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6fdacc74f

Aaron Lehmann
Aaron Lehmann
2002-08-21
FAILED Duration: 5s

Subject

vi inlining

Binary

No binary (build failed)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

—

Build Log

(log yok)

Commit Diff GitHub →

editors/vi.c +2870 -2870
editors/vi.c+2870 -2870
@@ -19,7 +19,7 @@
*/
static const char vi_Version[] =
- "$Id: vi.c,v 1.22 2002/07/31 21:22:21 sandman Exp $";
+ "$Id: vi.c,v 1.23 2002/08/21 13:02:24 aaronl Exp $";
/*
* To compile for standalone use:
@@ -202,7 +202,7 @@ static void do_cmd(Byte); // execute a command
static void sync_cursor(Byte *, int *, int *); // synchronize the screen cursor to dot
static Byte *begin_line(Byte *); // return pointer to cur line B-o-l
static Byte *end_line(Byte *); // return pointer to cur line E-o-l
-static Byte *dollar_line(Byte *); // return pointer to just before NL
+extern inline Byte *dollar_line(Byte *); // return pointer to just before NL
static Byte *prev_line(Byte *); // return pointer to prev line B-o-l
static Byte *next_line(Byte *); // return pointer to next line B-o-l
static Byte *end_screen(void); // get pointer to last char on screen
@@ -232,7 +232,7 @@ static Byte *text_hole_delete(Byte *, Byte *); // at "p", delete a 'size' byte h
static Byte *text_hole_make(Byte *, int); // at "p", make a 'size' byte hole
static Byte *yank_delete(Byte *, Byte *, int, int); // yank text[] into register then delete
static void show_help(void); // display some help info
-static void print_literal(Byte *, Byte *); // copy s to buf, convert unprintable
+extern inline void print_literal(Byte *, Byte *); // copy s to buf, convert unprintable
static void rawmode(void); // set "raw" mode on tty
static void cookmode(void); // return to "cooked" mode on tty
static int mysleep(int); // sleep for 'h' 1/100 seconds
@@ -296,7 +296,7 @@ static Byte *string_insert(Byte *, Byte *); // insert the string at 'p'
static Byte *text_yank(Byte *, Byte *, int); // save copy of "p" into a register
static Byte what_reg(void); // what is letter of current YDreg
static void check_context(Byte); // remember context for '' command
-static Byte *swap_context(Byte *); // goto new context for '' command
+extern inline Byte *swap_context(Byte *); // goto new context for '' command
#endif /* CONFIG_FEATURE_VI_YANKMARK */
#ifdef CONFIG_FEATURE_VI_CRASHME
static void crash_dummy();
@@ -758,3207 +758,3207 @@ static void crash_test()
}
#endif /* CONFIG_FEATURE_VI_CRASHME */
-//---------------------------------------------------------------------
-//----- the Ascii Chart -----------------------------------------------
-//
-// 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
-// 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
-// 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
-// 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
-// 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
-// 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
-// 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
-// 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
-// 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
-// 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
-// 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
-// 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
-// 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
-// 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
-// 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
-// 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
-//---------------------------------------------------------------------
-
-//----- Execute a Vi Command -----------------------------------
-static void do_cmd(Byte c)
+//----- The Colon commands -------------------------------------
+#ifdef CONFIG_FEATURE_VI_COLON
+static Byte *get_one_address(Byte * p, int *addr) // get colon addr, if present
{
- Byte c1, *p, *q, *msg, buf[9], *save_dot;
- int cnt, i, j, dir, yf;
-
- c1 = c; // quiet the compiler
- cnt = yf = dir = 0; // quiet the compiler
- p = q = save_dot = msg = buf; // quiet the compiler
- memset(buf, '\0', 9); // clear buf
+ int st;
+ Byte *q;
- /* if this is a cursor key, skip these checks */
- switch (c) {
- case VI_K_UP:
- case VI_K_DOWN:
- case VI_K_LEFT:
- case VI_K_RIGHT:
- case VI_K_HOME:
- case VI_K_END:
- case VI_K_PAGEUP:
- case VI_K_PAGEDOWN:
- goto key_cmd_mode;
- }
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ Byte c;
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+#ifdef CONFIG_FEATURE_VI_SEARCH
+ Byte *pat, buf[BUFSIZ];
+#endif /* CONFIG_FEATURE_VI_SEARCH */
- if (cmd_mode == 2) {
- // we are 'R'eplacing the current *dot with new char
- if (*dot == '\n') {
- // don't Replace past E-o-l
- cmd_mode = 1; // convert to insert
- } else {
- if (1 <= c && c <= 127) { // only ASCII chars
- if (c != 27)
- dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
- dot = char_insert(dot, c); // insert new char
+ *addr = -1; // assume no addr
+ if (*p == '.') { // the current line
+ p++;
+ q = begin_line(dot);
+ *addr = count_lines(text, q);
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ } else if (*p == '\'') { // is this a mark addr
+ p++;
+ c = tolower(*p);
+ p++;
+ if (c >= 'a' && c <= 'z') {
+ // we have a mark
+ c = c - 'a';
+ q = mark[(int) c];
+ if (q != NULL) { // is mark valid
+ *addr = count_lines(text, q); // count lines
}
- goto dc1;
}
- }
- if (cmd_mode == 1) {
- // hitting "Insert" twice means "R" replace mode
- if (c == VI_K_INSERT) goto dc5;
- // insert the char c at "dot"
- if (1 <= c && c <= 127) {
- dot = char_insert(dot, c); // only ASCII chars
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+#ifdef CONFIG_FEATURE_VI_SEARCH
+ } else if (*p == '/') { // a search pattern
+ q = buf;
+ for (p++; *p; p++) {
+ if (*p == '/')
+ break;
+ *q++ = *p;
+ *q = '\0';
}
- goto dc1;
+ pat = (Byte *) xstrdup((char *) buf); // save copy of pattern
+ if (*p == '/')
+ p++;
+ q = char_search(dot, pat, FORWARD, FULL);
+ if (q != NULL) {
+ *addr = count_lines(text, q);
+ }
+ free(pat);
+#endif /* CONFIG_FEATURE_VI_SEARCH */
+ } else if (*p == '$') { // the last line in file
+ p++;
+ q = begin_line(end - 1);
+ *addr = count_lines(text, q);
+ } else if (isdigit(*p)) { // specific line number
+ sscanf((char *) p, "%d%n", addr, &st);
+ p += st;
+ } else { // I don't reconise this
+ // unrecognised address- assume -1
+ *addr = -1;
}
+ return (p);
+}
-key_cmd_mode:
- switch (c) {
- //case 0x01: // soh
- //case 0x09: // ht
- //case 0x0b: // vt
- //case 0x0e: // so
- //case 0x0f: // si
- //case 0x10: // dle
- //case 0x11: // dc1
- //case 0x13: // dc3
-#ifdef CONFIG_FEATURE_VI_CRASHME
- case 0x14: // dc4 ctrl-T
- crashme = (crashme == 0) ? 1 : 0;
- break;
-#endif /* CONFIG_FEATURE_VI_CRASHME */
- //case 0x16: // syn
- //case 0x17: // etb
- //case 0x18: // can
- //case 0x1c: // fs
- //case 0x1d: // gs
- //case 0x1e: // rs
- //case 0x1f: // us
- //case '!': // !-
- //case '#': // #-
- //case '&': // &-
- //case '(': // (-
- //case ')': // )-
- //case '*': // *-
- //case ',': // ,-
- //case '=': // =-
- //case '@': // @-
- //case 'F': // F-
- //case 'K': // K-
- //case 'Q': // Q-
- //case 'S': // S-
- //case 'T': // T-
- //case 'V': // V-
- //case '[': // [-
- //case '\\': // \-
- //case ']': // ]-
- //case '_': // _-
- //case '`': // `-
- //case 'g': // g-
- //case 'u': // u- FIXME- there is no undo
- //case 'v': // v-
- default: // unrecognised command
- buf[0] = c;
- buf[1] = '\0';
- if (c <= ' ') {
- buf[0] = '^';
- buf[1] = c + '@';
- buf[2] = '\0';
- }
- ni((Byte *) buf);
- end_cmd_q(); // stop adding to q
- case 0x00: // nul- ignore
- break;
- case 2: // ctrl-B scroll up full screen
- case VI_K_PAGEUP: // Cursor Key Page Up
- dot_scroll(rows - 2, -1);
- break;
-#ifdef CONFIG_FEATURE_VI_USE_SIGNALS
- case 0x03: // ctrl-C interrupt
- longjmp(restart, 1);
- break;
- case 26: // ctrl-Z suspend
- suspend_sig(SIGTSTP);
- break;
-#endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
- case 4: // ctrl-D scroll down half screen
- dot_scroll((rows - 2) / 2, 1);
- break;
- case 5: // ctrl-E scroll down one line
- dot_scroll(1, 1);
- break;
- case 6: // ctrl-F scroll down full screen
- case VI_K_PAGEDOWN: // Cursor Key Page Down
- dot_scroll(rows - 2, 1);
- break;
- case 7: // ctrl-G show current status
- edit_status();
- break;
- case 'h': // h- move left
- case VI_K_LEFT: // cursor key Left
- case 8: // ctrl-H- move left (This may be ERASE char)
- case 127: // DEL- move left (This may be ERASE char)
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dot_left();
- break;
- case 10: // Newline ^J
- case 'j': // j- goto next line, same col
- case VI_K_DOWN: // cursor key Down
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dot_next(); // go to next B-o-l
- dot = move_to_col(dot, ccol + offset); // try stay in same col
- break;
- case 12: // ctrl-L force redraw whole screen
- case 18: // ctrl-R force redraw
- place_cursor(0, 0, FALSE); // put cursor in correct place
- clear_to_eos(); // tel terminal to erase display
- (void) mysleep(10);
- screen_erase(); // erase the internal screen buffer
- refresh(TRUE); // this will redraw the entire display
- break;
- case 13: // Carriage Return ^M
- case '+': // +- goto next line
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dot_next();
- dot_skip_over_ws();
- break;
- case 21: // ctrl-U scroll up half screen
- dot_scroll((rows - 2) / 2, -1);
- break;
- case 25: // ctrl-Y scroll up one line
- dot_scroll(1, -1);
- break;
- case 27: // esc
- if (cmd_mode == 0)
- indicate_error(c);
- cmd_mode = 0; // stop insrting
- end_cmd_q();
- *status_buffer = '\0'; // clear status buffer
- break;
- case ' ': // move right
- case 'l': // move right
- case VI_K_RIGHT: // Cursor Key Right
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dot_right();
- break;
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- case '"': // "- name a register to use for Delete/Yank
- c1 = get_one_char();
- c1 = tolower(c1);
- if (islower(c1)) {
- YDreg = c1 - 'a';
- } else {
- indicate_error(c);
- }
- break;
- case '\'': // '- goto a specific mark
- c1 = get_one_char();
- c1 = tolower(c1);
- if (islower(c1)) {
- c1 = c1 - 'a';
- // get the b-o-l
- q = mark[(int) c1];
- if (text <= q && q < end) {
- dot = q;
- dot_begin(); // go to B-o-l
- dot_skip_over_ws();
- }
- } else if (c1 == '\'') { // goto previous context
- dot = swap_context(dot); // swap current and previous context
- dot_begin(); // go to B-o-l
+static Byte *get_address(Byte *p, int *b, int *e) // get two colon addrs, if present
+{
+ //----- get the address' i.e., 1,3 'a,'b -----
+ // get FIRST addr, if present
+ while (isblnk(*p))
+ p++; // skip over leading spaces
+ if (*p == '%') { // alias for 1,$
+ p++;
+ *b = 1;
+ *e = count_lines(text, end-1);
+ goto ga0;
+ }
+ p = get_one_address(p, b);
+ while (isblnk(*p))
+ p++;
+ if (*p == ',') { // is there a address seperator
+ p++;
+ while (isblnk(*p))
+ p++;
+ // get SECOND addr, if present
+ p = get_one_address(p, e);
+ }
+ga0:
+ while (isblnk(*p))
+ p++; // skip over trailing spaces
+ return (p);
+}
+
+static void colon(Byte * buf)
+{
+ Byte c, *orig_buf, *buf1, *q, *r;
+ Byte *fn, cmd[BUFSIZ], args[BUFSIZ];
+ int i, l, li, ch, st, b, e;
+ int useforce, forced;
+ struct stat st_buf;
+
+ // :3154 // if (-e line 3154) goto it else stay put
+ // :4,33w! foo // write a portion of buffer to file "foo"
+ // :w // write all of buffer to current file
+ // :q // quit
+ // :q! // quit- dont care about modified file
+ // :'a,'z!sort -u // filter block through sort
+ // :'f // goto mark "f"
+ // :'fl // list literal the mark "f" line
+ // :.r bar // read file "bar" into buffer before dot
+ // :/123/,/abc/d // delete lines from "123" line to "abc" line
+ // :/xyz/ // goto the "xyz" line
+ // :s/find/replace/ // substitute pattern "find" with "replace"
+ // :!<cmd> // run <cmd> then return
+ //
+ if (strlen((char *) buf) <= 0)
+ goto vc1;
+ if (*buf == ':')
+ buf++; // move past the ':'
+
+ forced = useforce = FALSE;
+ li = st = ch = i = 0;
+ b = e = -1;
+ q = text; // assume 1,$ for the range
+ r = end - 1;
+ li = count_lines(text, end - 1);
+ fn = cfn; // default to current file
+ memset(cmd, '\0', BUFSIZ); // clear cmd[]
+ memset(args, '\0', BUFSIZ); // clear args[]
+
+ // look for optional address(es) :. :1 :1,9 :'q,'a :%
+ buf = get_address(buf, &b, &e);
+
+ // remember orig command line
+ orig_buf = buf;
+
+ // get the COMMAND into cmd[]
+ buf1 = cmd;
+ while (*buf != '\0') {
+ if (isspace(*buf))
+ break;
+ *buf1++ = *buf++;
+ }
+ // get any ARGuments
+ while (isblnk(*buf))
+ buf++;
+ strcpy((char *) args, (char *) buf);
+ buf1 = last_char_is((char *)cmd, '!');
+ if (buf1) {
+ useforce = TRUE;
+ *buf1 = '\0'; // get rid of !
+ }
+ if (b >= 0) {
+ // if there is only one addr, then the addr
+ // is the line number of the single line the
+ // user wants. So, reset the end
+ // pointer to point at end of the "b" line
+ q = find_line(b); // what line is #b
+ r = end_line(q);
+ li = 1;
+ }
+ if (e >= 0) {
+ // we were given two addrs. change the
+ // end pointer to the addr given by user.
+ r = find_line(e); // what line is #e
+ r = end_line(r);
+ li = e - b + 1;
+ }
+ // ------------ now look for the command ------------
+ i = strlen((char *) cmd);
+ if (i == 0) { // :123CR goto line #123
+ if (b >= 0) {
+ dot = find_line(b); // what line is #b
dot_skip_over_ws();
- } else {
- indicate_error(c);
}
- break;
- case 'm': // m- Mark a line
- // this is really stupid. If there are any inserts or deletes
- // between text[0] and dot then this mark will not point to the
- // correct location! It could be off by many lines!
- // Well..., at least its quick and dirty.
- c1 = get_one_char();
- c1 = tolower(c1);
- if (islower(c1)) {
- c1 = c1 - 'a';
- // remember the line
- mark[(int) c1] = dot;
- } else {
- indicate_error(c);
+ } else if (strncmp((char *) cmd, "!", 1) == 0) { // run a cmd
+ // :!ls run the <cmd>
+ (void) alarm(0); // wait for input- no alarms
+ place_cursor(rows - 1, 0, FALSE); // go to Status line
+ clear_to_eol(); // clear the line
+ cookmode();
+ system(orig_buf+1); // run the cmd
+ rawmode();
+ Hit_Return(); // let user see results
+ (void) alarm(3); // done waiting for input
+ } else if (strncmp((char *) cmd, "=", i) == 0) { // where is the address
+ if (b < 0) { // no addr given- use defaults
+ b = e = count_lines(text, dot);
}
- break;
- case 'P': // P- Put register before
- case 'p': // p- put register after
- p = reg[YDreg];
- if (p == 0) {
- psbs("Nothing in register %c", what_reg());
- break;
+ psb("%d", b);
+ } else if (strncasecmp((char *) cmd, "delete", i) == 0) { // delete lines
+ if (b < 0) { // no addr given- use defaults
+ q = begin_line(dot); // assume .,. for the range
+ r = end_line(dot);
}
- // are we putting whole lines or strings
- if (strchr((char *) p, '\n') != NULL) {
- if (c == 'P') {
- dot_begin(); // putting lines- Put above
+ dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
+ dot_skip_over_ws();
+ } else if (strncasecmp((char *) cmd, "edit", i) == 0) { // Edit a file
+ int sr;
+ sr= 0;
+ // don't edit, if the current file has been modified
+ if (file_modified && ! useforce) {
+ psbs("No write since last change (:edit! overrides)");
+ goto vc1;
+ }
+ if (strlen(args) > 0) {
+ // the user supplied a file name
+ fn= args;
+ } else if (cfn != 0 && strlen(cfn) > 0) {
+ // no user supplied name- use the current filename
+ fn= cfn;
+ goto vc5;
+ } else {
+ // no user file name, no current name- punt
+ psbs("No current filename");
+ goto vc1;
+ }
+
+ // see if file exists- if not, its just a new file request
+ if ((sr=stat((char*)fn, &st_buf)) < 0) {
+ // This is just a request for a new file creation.
+ // The file_insert below will fail but we get
+ // an empty buffer with a file name. Then the "write"
+ // command can do the create.
+ } else {
+ if ((st_buf.st_mode & (S_IFREG)) == 0) {
+ // This is not a regular file
+ psbs("\"%s\" is not a regular file", fn);
+ goto vc1;
}
- if (c == 'p') {
- // are we putting after very last line?
- if (end_line(dot) == (end - 1)) {
- dot = end; // force dot to end of text[]
- } else {
- dot_next(); // next line, then put before
- }
+ if ((st_buf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) {
+ // dont have any read permissions
+ psbs("\"%s\" is not readable", fn);
+ goto vc1;
}
- } else {
- if (c == 'p')
- dot_right(); // move to right, can move to NL
}
- dot = string_insert(dot, p); // insert the string
- end_cmd_q(); // stop adding to q
- break;
- case 'U': // U- Undo; replace current line with original version
- if (reg[Ureg] != 0) {
- p = begin_line(dot);
- q = end_line(dot);
- p = text_hole_delete(p, q); // delete cur line
- p = string_insert(p, reg[Ureg]); // insert orig line
- dot = p;
- dot_skip_over_ws();
+
+ // There is a read-able regular file
+ // make this the current file
+ q = (Byte *) xstrdup((char *) fn); // save the cfn
+ if (cfn != 0)
+ free(cfn); // free the old name
+ cfn = q; // remember new cfn
+
+ vc5:
+ // delete all the contents of text[]
+ new_text(2 * file_size(fn));
+ screenbegin = dot = end = text;
+
+ // insert new file
+ ch = file_insert(fn, text, file_size(fn));
+
+ if (ch < 1) {
+ // start empty buf with dummy line
+ (void) char_insert(text, '\n');
+ ch= 1;
}
- break;
+ file_modified = FALSE;
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
+ free(reg[Ureg]); // free orig line reg- for 'U'
+ reg[Ureg]= 0;
+ }
+ if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
+ free(reg[YDreg]); // free default yank/delete register
+ reg[YDreg]= 0;
+ }
+ for (li = 0; li < 28; li++) {
+ mark[li] = 0;
+ } // init the marks
#endif /* CONFIG_FEATURE_VI_YANKMARK */
- case '$': // $- goto end of line
- case VI_K_END: // Cursor Key End
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dot = end_line(dot + 1);
- break;
- case '%': // %- find matching char of pair () [] {}
- for (q = dot; q < end && *q != '\n'; q++) {
- if (strchr("()[]{}", *q) != NULL) {
- // we found half of a pair
- p = find_pair(q, *q);
- if (p == NULL) {
- indicate_error(c);
- } else {
- dot = p;
- }
- break;
- }
+ // how many lines in text[]?
+ li = count_lines(text, end - 1);
+ psb("\"%s\"%s"
+#ifdef CONFIG_FEATURE_VI_READONLY
+ "%s"
+#endif /* CONFIG_FEATURE_VI_READONLY */
+ " %dL, %dC", cfn,
+ (sr < 0 ? " [New file]" : ""),
+#ifdef CONFIG_FEATURE_VI_READONLY
+ ((vi_readonly || readonly) ? " [Read only]" : ""),
+#endif /* CONFIG_FEATURE_VI_READONLY */
+ li, ch);
+ } else if (strncasecmp((char *) cmd, "file", i) == 0) { // what File is this
+ if (b != -1 || e != -1) {
+ ni((Byte *) "No address allowed on this command");
+ goto vc1;
}
- if (*q == '\n')
- indicate_error(c);
- break;
- case 'f': // f- forward to a user specified char
- last_forward_char = get_one_char(); // get the search char
- //
- // dont seperate these two commands. 'f' depends on ';'
- //
- //**** fall thru to ... 'i'
- case ';': // ;- look at rest of line for last forward char
- if (cmdcnt-- > 1) {
- do_cmd(';');
- } // repeat cnt
- if (last_forward_char == 0) break;
- q = dot + 1;
- while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
- q++;
+ if (strlen((char *) args) > 0) {
+ // user wants a new filename
+ if (cfn != NULL)
+ free(cfn);
+ cfn = (Byte *) xstrdup((char *) args);
+ } else {
+ // user wants file status info
+ edit_status();
}
- if (*q == last_forward_char)
- dot = q;
- break;
- case '-': // -- goto prev line
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dot_prev();
- dot_skip_over_ws();
- break;
-#ifdef CONFIG_FEATURE_VI_DOT_CMD
- case '.': // .- repeat the last modifying command
- // Stuff the last_modifying_cmd back into stdin
- // and let it be re-executed.
- if (last_modifying_cmd != 0) {
- ioq = ioq_start = (Byte *) xstrdup((char *) last_modifying_cmd);
+ } else if (strncasecmp((char *) cmd, "features", i) == 0) { // what features are available
+ // print out values of all features
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
+ clear_to_eol(); // clear the line
+ cookmode();
+ show_help();
+ rawmode();
+ Hit_Return();
+ } else if (strncasecmp((char *) cmd, "list", i) == 0) { // literal print line
+ if (b < 0) { // no addr given- use defaults
+ q = begin_line(dot); // assume .,. for the range
+ r = end_line(dot);
}
- break;
-#endif /* CONFIG_FEATURE_VI_DOT_CMD */
-#ifdef CONFIG_FEATURE_VI_SEARCH
- case '?': // /- search for a pattern
- case '/': // /- search for a pattern
- buf[0] = c;
- buf[1] = '\0';
- q = get_input_line(buf); // get input line- use "status line"
- if (strlen((char *) q) == 1)
- goto dc3; // if no pat re-use old pat
- if (strlen((char *) q) > 1) { // new pat- save it and find
- // there is a new pat
- if (last_search_pattern != 0) {
- free(last_search_pattern);
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
+ clear_to_eol(); // clear the line
+ write(1, "\r\n", 2);
+ for (; q <= r; q++) {
+ c = *q;
+ if (c > '~')
+ standout_start();
+ if (c == '\n') {
+ write(1, "$\r", 2);
+ } else if (*q < ' ') {
+ write(1, "^", 1);
+ c += '@';
}
- last_search_pattern = (Byte *) xstrdup((char *) q);
- goto dc3; // now find the pattern
+ write(1, &c, 1);
+ if (c > '~')
+ standout_end();
}
- // user changed mind and erased the "/"- do nothing
- break;
- case 'N': // N- backward search for last pattern
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dir = BACK; // assume BACKWARD search
- p = dot - 1;
- if (last_search_pattern[0] == '?') {
- dir = FORWARD;
- p = dot + 1;
+#ifdef CONFIG_FEATURE_VI_SET
+ vc2:
+#endif /* CONFIG_FEATURE_VI_SET */
+ Hit_Return();
+ } else if ((strncasecmp((char *) cmd, "quit", i) == 0) || // Quit
+ (strncasecmp((char *) cmd, "next", i) == 0)) { // edit next file
+ if (useforce) {
+ // force end of argv list
+ if (*cmd == 'q') {
+ optind = save_argc;
+ }
+ editing = 0;
+ goto vc1;
}
- goto dc4; // now search for pattern
- break;
- case 'n': // n- repeat search for last pattern
- // search rest of text[] starting at next char
- // if search fails return orignal "p" not the "p+1" address
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dc3:
- if (last_search_pattern == 0) {
- msg = (Byte *) "No previous regular expression";
- goto dc2;
+ // don't exit if the file been modified
+ if (file_modified) {
+ psbs("No write since last change (:%s! overrides)",
+ (*cmd == 'q' ? "quit" : "next"));
+ goto vc1;
}
- if (last_search_pattern[0] == '/') {
- dir = FORWARD; // assume FORWARD search
- p = dot + 1;
+ // are there other file to edit
+ if (*cmd == 'q' && optind < save_argc - 1) {
+ psbs("%d more file to edit", (save_argc - optind - 1));
+ goto vc1;
}
- if (last_search_pattern[0] == '?') {
- dir = BACK;
- p = dot - 1;
+ if (*cmd == 'n' && optind >= save_argc - 1) {
+ psbs("No more files to edit");
+ goto vc1;
}
- dc4:
- q = char_search(p, last_search_pattern + 1, dir, FULL);
- if (q != NULL) {
- dot = q; // good search, update "dot"
- msg = (Byte *) "";
- goto dc2;
+ editing = 0;
+ } else if (strncasecmp((char *) cmd, "read", i) == 0) { // read file into text[]
+ fn = args;
+ if (strlen((char *) fn) <= 0) {
+ psbs("No filename given");
+ goto vc1;
}
- // no pattern found between "dot" and "end"- continue at top
- p = text;
- if (dir == BACK) {
- p = end - 1;
+ if (b < 0) { // no addr given- use defaults
+ q = begin_line(dot); // assume "dot"
}
- q = char_search(p, last_search_pattern + 1, dir, FULL);
- if (q != NULL) { // found something
- dot = q; // found new pattern- goto it
- msg = (Byte *) "search hit BOTTOM, continuing at TOP";
- if (dir == BACK) {
- msg = (Byte *) "search hit TOP, continuing at BOTTOM";
- }
- } else {
- msg = (Byte *) "Pattern not found";
+ // read after current line- unless user said ":0r foo"
+ if (b != 0)
+ q = next_line(q);
+#ifdef CONFIG_FEATURE_VI_READONLY
+ l= readonly; // remember current files' status
+#endif
+ ch = file_insert(fn, q, file_size(fn));
+#ifdef CONFIG_FEATURE_VI_READONLY
+ readonly= l;
+#endif
+ if (ch < 0)
+ goto vc1; // nothing was inserted
+ // how many lines in text[]?
+ li = count_lines(q, q + ch - 1);
+ psb("\"%s\""
+#ifdef CONFIG_FEATURE_VI_READONLY
+ "%s"
+#endif /* CONFIG_FEATURE_VI_READONLY */
+ " %dL, %dC", fn,
+#ifdef CONFIG_FEATURE_VI_READONLY
+ ((vi_readonly || readonly) ? " [Read only]" : ""),
+#endif /* CONFIG_FEATURE_VI_READONLY */
+ li, ch);
+ if (ch > 0) {
+ // if the insert is before "dot" then we need to update
+ if (q <= dot)
+ dot += ch;
+ file_modified = TRUE;
}
- dc2:
- psbs("%s", msg);
- break;
- case '{': // {- move backward paragraph
- q = char_search(dot, (Byte *) "\n\n", BACK, FULL);
- if (q != NULL) { // found blank line
- dot = next_line(q); // move to next blank line
+ } else if (strncasecmp((char *) cmd, "rewind", i) == 0) { // rewind cmd line args
+ if (file_modified && ! useforce) {
+ psbs("No write since last change (:rewind! overrides)");
+ } else {
+ // reset the filenames to edit
+ optind = fn_start - 1;
+ editing = 0;
}
- break;
- case '}': // }- move forward paragraph
- q = char_search(dot, (Byte *) "\n\n", FORWARD, FULL);
- if (q != NULL) { // found blank line
- dot = next_line(q); // move to next blank line
+#ifdef CONFIG_FEATURE_VI_SET
+ } else if (strncasecmp((char *) cmd, "set", i) == 0) { // set or clear features
+ i = 0; // offset into args
+ if (strlen((char *) args) == 0) {
+ // print out values of all options
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
+ clear_to_eol(); // clear the line
+ printf("----------------------------------------\r\n");
+#ifdef CONFIG_FEATURE_VI_SETOPTS
+ if (!autoindent)
+ printf("no");
+ printf("autoindent ");
+ if (!err_method)
+ printf("no");
+ printf("flash ");
+ if (!ignorecase)
+ printf("no");
+ printf("ignorecase ");
+ if (!showmatch)
+ printf("no");
+ printf("showmatch ");
+ printf("tabstop=%d ", tabstop);
+#endif /* CONFIG_FEATURE_VI_SETOPTS */
+ printf("\r\n");
+ goto vc2;
}
- break;
-#endif /* CONFIG_FEATURE_VI_SEARCH */
- case '0': // 0- goto begining of line
- case '1': // 1-
- case '2': // 2-
- case '3': // 3-
- case '4': // 4-
- case '5': // 5-
- case '6': // 6-
- case '7': // 7-
- case '8': // 8-
- case '9': // 9-
- if (c == '0' && cmdcnt < 1) {
- dot_begin(); // this was a standalone zero
- } else {
- cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
+ if (strncasecmp((char *) args, "no", 2) == 0)
+ i = 2; // ":set noautoindent"
+#ifdef CONFIG_FEATURE_VI_SETOPTS
+ if (strncasecmp((char *) args + i, "autoindent", 10) == 0 ||
+ strncasecmp((char *) args + i, "ai", 2) == 0) {
+ autoindent = (i == 2) ? 0 : 1;
}
- break;
- case ':': // :- the colon mode commands
- p = get_input_line((Byte *) ":"); // get input line- use "status line"
-#ifdef CONFIG_FEATURE_VI_COLON
- colon(p); // execute the command
-#else /* CONFIG_FEATURE_VI_COLON */
- if (*p == ':')
- p++; // move past the ':'
- cnt = strlen((char *) p);
- if (cnt <= 0)
- break;
- if (strncasecmp((char *) p, "quit", cnt) == 0 ||
- strncasecmp((char *) p, "q!", cnt) == 0) { // delete lines
- if (file_modified && p[1] != '!') {
- psbs("No write since last change (:quit! overrides)");
- } else {
- editing = 0;
- }
- } else if (strncasecmp((char *) p, "write", cnt) == 0 ||
- strncasecmp((char *) p, "wq", cnt) == 0 ||
- strncasecmp((char *) p, "x", cnt) == 0) {
- cnt = file_write(cfn, text, end - 1);
- file_modified = FALSE;
- psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt);
- if (p[0] == 'x' || p[1] == 'q') {
- editing = 0;
- }
- } else if (strncasecmp((char *) p, "file", cnt) == 0 ) {
- edit_status(); // show current file status
- } else if (sscanf((char *) p, "%d", &j) > 0) {
- dot = find_line(j); // go to line # j
- dot_skip_over_ws();
- } else { // unrecognised cmd
- ni((Byte *) p);
+ if (strncasecmp((char *) args + i, "flash", 5) == 0 ||
+ strncasecmp((char *) args + i, "fl", 2) == 0) {
+ err_method = (i == 2) ? 0 : 1;
}
-#endif /* CONFIG_FEATURE_VI_COLON */
- break;
- case '<': // <- Left shift something
- case '>': // >- Right shift something
- cnt = count_lines(text, dot); // remember what line we are on
- c1 = get_one_char(); // get the type of thing to delete
- find_range(&p, &q, c1);
- (void) yank_delete(p, q, 1, YANKONLY); // save copy before change
- p = begin_line(p);
- q = end_line(q);
- i = count_lines(p, q); // # of lines we are shifting
- for ( ; i > 0; i--, p = next_line(p)) {
- if (c == '<') {
- // shift left- remove tab or 8 spaces
- if (*p == '\t') {
- // shrink buffer 1 char
- (void) text_hole_delete(p, p);
- } else if (*p == ' ') {
- // we should be calculating columns, not just SPACE
- for (j = 0; *p == ' ' && j < tabstop; j++) {
- (void) text_hole_delete(p, p);
+ if (strncasecmp((char *) args + i, "ignorecase", 10) == 0 ||
+ strncasecmp((char *) args + i, "ic", 2) == 0) {
+ ignorecase = (i == 2) ? 0 : 1;
+ }
+ if (strncasecmp((char *) args + i, "showmatch", 9) == 0 ||
+ strncasecmp((char *) args + i, "sm", 2) == 0) {
+ showmatch = (i == 2) ? 0 : 1;
+ }
+ if (strncasecmp((char *) args + i, "tabstop", 7) == 0) {
+ sscanf(strchr((char *) args + i, '='), "=%d", &ch);
+ if (ch > 0 && ch < columns - 1)
+ tabstop = ch;
+ }
+#endif /* CONFIG_FEATURE_VI_SETOPTS */
+#endif /* CONFIG_FEATURE_VI_SET */
+#ifdef CONFIG_FEATURE_VI_SEARCH
+ } else if (strncasecmp((char *) cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
+ Byte *ls, *F, *R;
+ int gflag;
+
+ // F points to the "find" pattern
+ // R points to the "replace" pattern
+ // replace the cmd line delimiters "/" with NULLs
+ gflag = 0; // global replace flag
+ c = orig_buf[1]; // what is the delimiter
+ F = orig_buf + 2; // start of "find"
+ R = (Byte *) strchr((char *) F, c); // middle delimiter
+ if (!R) goto colon_s_fail;
+ *R++ = '\0'; // terminate "find"
+ buf1 = (Byte *) strchr((char *) R, c);
+ if (!buf1) goto colon_s_fail;
+ *buf1++ = '\0'; // terminate "replace"
+ if (*buf1 == 'g') { // :s/foo/bar/g
+ buf1++;
+ gflag++; // turn on gflag
+ }
+ q = begin_line(q);
+ if (b < 0) { // maybe :s/foo/bar/
+ q = begin_line(dot); // start with cur line
+ b = count_lines(text, q); // cur line number
+ }
+ if (e < 0)
+ e = b; // maybe :.s/foo/bar/
+ for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
+ ls = q; // orig line start
+ vc4:
+ buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
+ if (buf1 != NULL) {
+ // we found the "find" pattern- delete it
+ (void) text_hole_delete(buf1, buf1 + strlen((char *) F) - 1);
+ // inset the "replace" patern
+ (void) string_insert(buf1, R); // insert the string
+ // check for "global" :s/foo/bar/g
+ if (gflag == 1) {
+ if ((buf1 + strlen((char *) R)) < end_line(ls)) {
+ q = buf1 + strlen((char *) R);
+ goto vc4; // don't let q move past cur line
}
}
- } else if (c == '>') {
- // shift right -- add tab or 8 spaces
- (void) char_insert(p, '\t');
}
+ q = next_line(ls);
}
- dot = find_line(cnt); // what line were we on
- dot_skip_over_ws();
- end_cmd_q(); // stop adding to q
- break;
- case 'A': // A- append at e-o-l
- dot_end(); // go to e-o-l
- //**** fall thru to ... 'a'
- case 'a': // a- append after current char
- if (*dot != '\n')
- dot++;
- goto dc_i;
- break;
- case 'B': // B- back a blank-delimited Word
- case 'E': // E- end of a blank-delimited word
- case 'W': // W- forward a blank-delimited word
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dir = FORWARD;
- if (c == 'B')
- dir = BACK;
- if (c == 'W' || isspace(dot[dir])) {
- dot = skip_thing(dot, 1, dir, S_TO_WS);
- dot = skip_thing(dot, 2, dir, S_OVER_WS);
+#endif /* CONFIG_FEATURE_VI_SEARCH */
+ } else if (strncasecmp((char *) cmd, "version", i) == 0) { // show software version
+ psb("%s", vi_Version);
+ } else if ((strncasecmp((char *) cmd, "write", i) == 0) || // write text to file
+ (strncasecmp((char *) cmd, "wq", i) == 0) ||
+ (strncasecmp((char *) cmd, "x", i) == 0)) {
+ // is there a file name to write to?
+ if (strlen((char *) args) > 0) {
+ fn = args;
}
- if (c != 'W')
- dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
- break;
- case 'C': // C- Change to e-o-l
- case 'D': // D- delete to e-o-l
- save_dot = dot;
- dot = dollar_line(dot); // move to before NL
- // copy text into a register and delete
- dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
- if (c == 'C')
- goto dc_i; // start inserting
-#ifdef CONFIG_FEATURE_VI_DOT_CMD
- if (c == 'D')
- end_cmd_q(); // stop adding to q
-#endif /* CONFIG_FEATURE_VI_DOT_CMD */
- break;
- case 'G': // G- goto to a line number (default= E-O-F)
- dot = end - 1; // assume E-O-F
- if (cmdcnt > 0) {
- dot = find_line(cmdcnt); // what line is #cmdcnt
+#ifdef CONFIG_FEATURE_VI_READONLY
+ if ((vi_readonly || readonly) && ! useforce) {
+ psbs("\"%s\" File is read only", fn);
+ goto vc3;
}
- dot_skip_over_ws();
- break;
- case 'H': // H- goto top line on screen
- dot = screenbegin;
- if (cmdcnt > (rows - 1)) {
- cmdcnt = (rows - 1);
+#endif /* CONFIG_FEATURE_VI_READONLY */
+ // how many lines in text[]?
+ li = count_lines(q, r);
+ ch = r - q + 1;
+ // see if file exists- if not, its just a new file request
+ if (useforce) {
+ // if "fn" is not write-able, chmod u+w
+ // sprintf(syscmd, "chmod u+w %s", fn);
+ // system(syscmd);
+ forced = TRUE;
}
- if (cmdcnt-- > 1) {
- do_cmd('+');
- } // repeat cnt
- dot_skip_over_ws();
- break;
- case 'I': // I- insert before first non-blank
- dot_begin(); // 0
- dot_skip_over_ws();
- //**** fall thru to ... 'i'
- case 'i': // i- insert before current char
- case VI_K_INSERT: // Cursor Key Insert
- dc_i:
- cmd_mode = 1; // start insrting
- psb("-- Insert --");
- break;
- case 'J': // J- join current and next lines together
- if (cmdcnt-- > 2) {
- do_cmd(c);
- } // repeat cnt
- dot_end(); // move to NL
- if (dot < end - 1) { // make sure not last char in text[]
- *dot++ = ' '; // replace NL with space
- while (isblnk(*dot)) { // delete leading WS
- dot_delete();
- }
- }
- end_cmd_q(); // stop adding to q
- break;
- case 'L': // L- goto bottom line on screen
- dot = end_screen();
- if (cmdcnt > (rows - 1)) {
- cmdcnt = (rows - 1);
- }
- if (cmdcnt-- > 1) {
- do_cmd('-');
- } // repeat cnt
- dot_begin();
- dot_skip_over_ws();
- break;
- case 'M': // M- goto middle line on screen
- dot = screenbegin;
- for (cnt = 0; cnt < (rows-1) / 2; cnt++)
- dot = next_line(dot);
- break;
- case 'O': // O- open a empty line above
- // 0i\n ESC -i
- p = begin_line(dot);
- if (p[-1] == '\n') {
- dot_prev();
- case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
- dot_end();
- dot = char_insert(dot, '\n');
- } else {
- dot_begin(); // 0
- dot = char_insert(dot, '\n'); // i\n ESC
- dot_prev(); // -
- }
- goto dc_i;
- break;
- case 'R': // R- continuous Replace char
- dc5:
- cmd_mode = 2;
- psb("-- Replace --");
- break;
- case 'X': // X- delete char before dot
- case 'x': // x- delete the current char
- case 's': // s- substitute the current char
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dir = 0;
- if (c == 'X')
- dir = -1;
- if (dot[dir] != '\n') {
- if (c == 'X')
- dot--; // delete prev char
- dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
+ l = file_write(fn, q, r);
+ if (useforce && forced) {
+ // chmod u-w
+ // sprintf(syscmd, "chmod u-w %s", fn);
+ // system(syscmd);
+ forced = FALSE;
}
- if (c == 's')
- goto dc_i; // start insrting
- end_cmd_q(); // stop adding to q
- break;
- case 'Z': // Z- if modified, {write}; exit
- // ZZ means to save file (if necessary), then exit
- c1 = get_one_char();
- if (c1 != 'Z') {
- indicate_error(c);
- break;
+ psb("\"%s\" %dL, %dC", fn, li, l);
+ if (q == text && r == end - 1 && l == ch)
+ file_modified = FALSE;
+ if ((cmd[0] == 'x' || cmd[1] == 'q') && l == ch) {
+ editing = 0;
}
- if (file_modified
#ifdef CONFIG_FEATURE_VI_READONLY
- && ! vi_readonly
- && ! readonly
+ vc3:;
#endif /* CONFIG_FEATURE_VI_READONLY */
- ) {
- cnt = file_write(cfn, text, end - 1);
- if (cnt == (end - 1 - text + 1)) {
- editing = 0;
- }
- } else {
- editing = 0;
- }
- break;
- case '^': // ^- move to first non-blank on line
- dot_begin();
- dot_skip_over_ws();
- break;
- case 'b': // b- back a word
- case 'e': // e- end of word
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dir = FORWARD;
- if (c == 'b')
- dir = BACK;
- if ((dot + dir) < text || (dot + dir) > end - 1)
- break;
- dot += dir;
- if (isspace(*dot)) {
- dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
- }
- if (isalnum(*dot) || *dot == '_') {
- dot = skip_thing(dot, 1, dir, S_END_ALNUM);
- } else if (ispunct(*dot)) {
- dot = skip_thing(dot, 1, dir, S_END_PUNCT);
- }
- break;
- case 'c': // c- change something
- case 'd': // d- delete something
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- case 'y': // y- yank something
- case 'Y': // Y- Yank a line
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
- yf = YANKDEL; // assume either "c" or "d"
#ifdef CONFIG_FEATURE_VI_YANKMARK
- if (c == 'y' || c == 'Y')
- yf = YANKONLY;
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
- c1 = 'y';
- if (c != 'Y')
- c1 = get_one_char(); // get the type of thing to delete
- find_range(&p, &q, c1);
- if (c1 == 27) { // ESC- user changed mind and wants out
- c = c1 = 27; // Escape- do nothing
- } else if (strchr("wW", c1)) {
- if (c == 'c') {
- // don't include trailing WS as part of word
- while (isblnk(*q)) {
- if (q <= text || q[-1] == '\n')
- break;
- q--;
- }
- }
- dot = yank_delete(p, q, 0, yf); // delete word
- } else if (strchr("^0bBeEft$", c1)) {
- // single line copy text into a register and delete
- dot = yank_delete(p, q, 0, yf); // delete word
- } else if (strchr("cdykjHL%+-{}\r\n", c1)) {
- // multiple line copy text into a register and delete
- dot = yank_delete(p, q, 1, yf); // delete lines
- if (c == 'c') {
- dot = char_insert(dot, '\n');
- // on the last line of file don't move to prev line
- if (dot != (end-1)) {
- dot_prev();
- }
- } else if (c == 'd') {
- dot_begin();
- dot_skip_over_ws();
- }
- } else {
- // could not recognize object
- c = c1 = 27; // error-
- indicate_error(c);
+ } else if (strncasecmp((char *) cmd, "yank", i) == 0) { // yank lines
+ if (b < 0) { // no addr given- use defaults
+ q = begin_line(dot); // assume .,. for the range
+ r = end_line(dot);
}
- if (c1 != 27) {
- // if CHANGING, not deleting, start inserting after the delete
- if (c == 'c') {
- strcpy((char *) buf, "Change");
- goto dc_i; // start inserting
- }
- if (c == 'd') {
- strcpy((char *) buf, "Delete");
- }
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- if (c == 'y' || c == 'Y') {
- strcpy((char *) buf, "Yank");
- }
- p = reg[YDreg];
- q = p + strlen((char *) p);
- for (cnt = 0; p <= q; p++) {
- if (*p == '\n')
- cnt++;
- }
- psb("%s %d lines (%d chars) using [%c]",
- buf, cnt, strlen((char *) reg[YDreg]), what_reg());
+ text_yank(q, r, YDreg);
+ li = count_lines(q, r);
+ psb("Yank %d lines (%d chars) into [%c]",
+ li, strlen((char *) reg[YDreg]), what_reg());
#endif /* CONFIG_FEATURE_VI_YANKMARK */
- end_cmd_q(); // stop adding to q
+ } else {
+ // cmd unknown
+ ni((Byte *) cmd);
+ }
+ vc1:
+ dot = bound_dot(dot); // make sure "dot" is valid
+ return;
+#ifdef CONFIG_FEATURE_VI_SEARCH
+colon_s_fail:
+ psb(":s expression missing delimiters");
+ return;
+#endif
+
+}
+
+static void Hit_Return(void)
+{
+ char c;
+
+ standout_start(); // start reverse video
+ write(1, "[Hit return to continue]", 24);
+ standout_end(); // end reverse video
+ while ((c = get_one_char()) != '\n' && c != '\r') /*do nothing */
+ ;
+ redraw(TRUE); // force redraw all
+}
+#endif /* CONFIG_FEATURE_VI_COLON */
+
+//----- Synchronize the cursor to Dot --------------------------
+static void sync_cursor(Byte * d, int *row, int *col)
+{
+ Byte *beg_cur, *end_cur; // begin and end of "d" line
+ Byte *beg_scr, *end_scr; // begin and end of screen
+ Byte *tp;
+ int cnt, ro, co;
+
+ beg_cur = begin_line(d); // first char of cur line
+ end_cur = end_line(d); // last char of cur line
+
+ beg_scr = end_scr = screenbegin; // first char of screen
+ end_scr = end_screen(); // last char of screen
+
+ if (beg_cur < screenbegin) {
+ // "d" is before top line on screen
+ // how many lines do we have to move
+ cnt = count_lines(beg_cur, screenbegin);
+ sc1:
+ screenbegin = beg_cur;
+ if (cnt > (rows - 1) / 2) {
+ // we moved too many lines. put "dot" in middle of screen
+ for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
+ screenbegin = prev_line(screenbegin);
+ }
}
- break;
- case 'k': // k- goto prev line, same col
- case VI_K_UP: // cursor key Up
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- dot_prev();
- dot = move_to_col(dot, ccol + offset); // try stay in same col
- break;
- case 'r': // r- replace the current char with user input
- c1 = get_one_char(); // get the replacement char
- if (*dot != '\n') {
- *dot = c1;
- file_modified = TRUE; // has the file been modified
- }
- end_cmd_q(); // stop adding to q
- break;
- case 't': // t- move to char prior to next x
- last_forward_char = get_one_char();
- do_cmd(';');
- if (*dot == last_forward_char)
- dot_left();
- last_forward_char= 0;
- break;
- case 'w': // w- forward a word
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
- dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
- } else if (ispunct(*dot)) { // we are on PUNCT
- dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
- }
- if (dot < end - 1)
- dot++; // move over word
- if (isspace(*dot)) {
- dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
- }
- break;
- case 'z': // z-
- c1 = get_one_char(); // get the replacement char
- cnt = 0;
- if (c1 == '.')
- cnt = (rows - 2) / 2; // put dot at center
- if (c1 == '-')
- cnt = rows - 2; // put dot at bottom
- screenbegin = begin_line(dot); // start dot at top
- dot_scroll(cnt, -1);
- break;
- case '|': // |- move to column "cmdcnt"
- dot = move_to_col(dot, cmdcnt - 1); // try to move to column
- break;
- case '~': // ~- flip the case of letters a-z -> A-Z
- if (cmdcnt-- > 1) {
- do_cmd(c);
- } // repeat cnt
- if (islower(*dot)) {
- *dot = toupper(*dot);
- file_modified = TRUE; // has the file been modified
- } else if (isupper(*dot)) {
- *dot = tolower(*dot);
- file_modified = TRUE; // has the file been modified
+ } else if (beg_cur > end_scr) {
+ // "d" is after bottom line on screen
+ // how many lines do we have to move
+ cnt = count_lines(end_scr, beg_cur);
+ if (cnt > (rows - 1) / 2)
+ goto sc1; // too many lines
+ for (ro = 0; ro < cnt - 1; ro++) {
+ // move screen begin the same amount
+ screenbegin = next_line(screenbegin);
+ // now, move the end of screen
+ end_scr = next_line(end_scr);
+ end_scr = end_line(end_scr);
}
- dot_right();
- end_cmd_q(); // stop adding to q
- break;
- //----- The Cursor and Function Keys -----------------------------
- case VI_K_HOME: // Cursor Key Home
- dot_begin();
- break;
- // The Fn keys could point to do_macro which could translate them
- case VI_K_FUN1: // Function Key F1
- case VI_K_FUN2: // Function Key F2
- case VI_K_FUN3: // Function Key F3
- case VI_K_FUN4: // Function Key F4
- case VI_K_FUN5: // Function Key F5
- case VI_K_FUN6: // Function Key F6
- case VI_K_FUN7: // Function Key F7
- case VI_K_FUN8: // Function Key F8
- case VI_K_FUN9: // Function Key F9
- case VI_K_FUN10: // Function Key F10
- case VI_K_FUN11: // Function Key F11
- case VI_K_FUN12: // Function Key F12
- break;
+ }
+ // "d" is on screen- find out which row
+ tp = screenbegin;
+ for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
+ if (tp == beg_cur)
+ break;
+ tp = next_line(tp);
}
- dc1:
- // if text[] just became empty, add back an empty line
- if (end == text) {
- (void) char_insert(text, '\n'); // start empty buf with dummy line
- dot = text;
+ // find out what col "d" is on
+ co = 0;
+ do { // drive "co" to correct column
+ if (*tp == '\n' || *tp == '\0')
+ break;
+ if (*tp == '\t') {
+ // 7 - (co % 8 )
+ co += ((tabstop - 1) - (co % tabstop));
+ } else if (*tp < ' ') {
+ co++; // display as ^X, use 2 columns
+ }
+ } while (tp++ < d && ++co);
+
+ // "co" is the column where "dot" is.
+ // The screen has "columns" columns.
+ // The currently displayed columns are 0+offset -- columns+ofset
+ // |-------------------------------------------------------------|
+ // ^ ^ ^
+ // offset | |------- columns ----------------|
+ //
+ // If "co" is already in this range then we do not have to adjust offset
+ // but, we do have to subtract the "offset" bias from "co".
+ // If "co" is outside this range then we have to change "offset".
+ // If the first char of a line is a tab the cursor will try to stay
+ // in column 7, but we have to set offset to 0.
+
+ if (co < 0 + offset) {
+ offset = co;
}
- // it is OK for dot to exactly equal to end, otherwise check dot validity
- if (dot != end) {
- dot = bound_dot(dot); // make sure "dot" is valid
+ if (co >= columns + offset) {
+ offset = co - columns + 1;
}
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- check_context(c); // update the current context
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
+ // if the first char of the line is a tab, and "dot" is sitting on it
+ // force offset to 0.
+ if (d == beg_cur && *d == '\t') {
+ offset = 0;
+ }
+ co -= offset;
- if (!isdigit(c))
- cmdcnt = 0; // cmd was not a number, reset cmdcnt
- cnt = dot - begin_line(dot);
- // Try to stay off of the Newline
- if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
- dot--;
+ *row = ro;
+ *col = co;
}
-//----- The Colon commands -------------------------------------
-#ifdef CONFIG_FEATURE_VI_COLON
-static Byte *get_one_address(Byte * p, int *addr) // get colon addr, if present
+//----- Text Movement Routines ---------------------------------
+static Byte *begin_line(Byte * p) // return pointer to first char cur line
{
- int st;
- Byte *q;
-
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- Byte c;
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
-#ifdef CONFIG_FEATURE_VI_SEARCH
- Byte *pat, buf[BUFSIZ];
-#endif /* CONFIG_FEATURE_VI_SEARCH */
+ while (p > text && p[-1] != '\n')
+ p--; // go to cur line B-o-l
+ return (p);
+}
- *addr = -1; // assume no addr
- if (*p == '.') { // the current line
- p++;
- q = begin_line(dot);
- *addr = count_lines(text, q);
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- } else if (*p == '\'') { // is this a mark addr
- p++;
- c = tolower(*p);
- p++;
- if (c >= 'a' && c <= 'z') {
- // we have a mark
- c = c - 'a';
- q = mark[(int) c];
- if (q != NULL) { // is mark valid
- *addr = count_lines(text, q); // count lines
- }
- }
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
-#ifdef CONFIG_FEATURE_VI_SEARCH
- } else if (*p == '/') { // a search pattern
- q = buf;
- for (p++; *p; p++) {
- if (*p == '/')
- break;
- *q++ = *p;
- *q = '\0';
- }
- pat = (Byte *) xstrdup((char *) buf); // save copy of pattern
- if (*p == '/')
- p++;
- q = char_search(dot, pat, FORWARD, FULL);
- if (q != NULL) {
- *addr = count_lines(text, q);
- }
- free(pat);
-#endif /* CONFIG_FEATURE_VI_SEARCH */
- } else if (*p == '$') { // the last line in file
- p++;
- q = begin_line(end - 1);
- *addr = count_lines(text, q);
- } else if (isdigit(*p)) { // specific line number
- sscanf((char *) p, "%d%n", addr, &st);
- p += st;
- } else { // I don't reconise this
- // unrecognised address- assume -1
- *addr = -1;
- }
+static Byte *end_line(Byte * p) // return pointer to NL of cur line line
+{
+ while (p < end - 1 && *p != '\n')
+ p++; // go to cur line E-o-l
return (p);
}
-static Byte *get_address(Byte *p, int *b, int *e) // get two colon addrs, if present
+extern inline Byte *dollar_line(Byte * p) // return pointer to just before NL line
{
- //----- get the address' i.e., 1,3 'a,'b -----
- // get FIRST addr, if present
- while (isblnk(*p))
- p++; // skip over leading spaces
- if (*p == '%') { // alias for 1,$
- p++;
- *b = 1;
- *e = count_lines(text, end-1);
- goto ga0;
- }
- p = get_one_address(p, b);
- while (isblnk(*p))
- p++;
- if (*p == ',') { // is there a address seperator
- p++;
- while (isblnk(*p))
- p++;
- // get SECOND addr, if present
- p = get_one_address(p, e);
- }
-ga0:
- while (isblnk(*p))
- p++; // skip over trailing spaces
+ while (p < end - 1 && *p != '\n')
+ p++; // go to cur line E-o-l
+ // Try to stay off of the Newline
+ if (*p == '\n' && (p - begin_line(p)) > 0)
+ p--;
return (p);
}
-static void colon(Byte * buf)
+static Byte *prev_line(Byte * p) // return pointer first char prev line
{
- Byte c, *orig_buf, *buf1, *q, *r;
- Byte *fn, cmd[BUFSIZ], args[BUFSIZ];
- int i, l, li, ch, st, b, e;
- int useforce, forced;
- struct stat st_buf;
+ p = begin_line(p); // goto begining of cur line
+ if (p[-1] == '\n' && p > text)
+ p--; // step to prev line
+ p = begin_line(p); // goto begining of prev line
+ return (p);
+}
- // :3154 // if (-e line 3154) goto it else stay put
- // :4,33w! foo // write a portion of buffer to file "foo"
- // :w // write all of buffer to current file
- // :q // quit
- // :q! // quit- dont care about modified file
- // :'a,'z!sort -u // filter block through sort
- // :'f // goto mark "f"
- // :'fl // list literal the mark "f" line
- // :.r bar // read file "bar" into buffer before dot
- // :/123/,/abc/d // delete lines from "123" line to "abc" line
- // :/xyz/ // goto the "xyz" line
- // :s/find/replace/ // substitute pattern "find" with "replace"
- // :!<cmd> // run <cmd> then return
- //
- if (strlen((char *) buf) <= 0)
- goto vc1;
- if (*buf == ':')
- buf++; // move past the ':'
+static Byte *next_line(Byte * p) // return pointer first char next line
+{
+ p = end_line(p);
+ if (*p == '\n' && p < end - 1)
+ p++; // step to next line
+ return (p);
+}
- forced = useforce = FALSE;
- li = st = ch = i = 0;
- b = e = -1;
- q = text; // assume 1,$ for the range
- r = end - 1;
- li = count_lines(text, end - 1);
- fn = cfn; // default to current file
- memset(cmd, '\0', BUFSIZ); // clear cmd[]
- memset(args, '\0', BUFSIZ); // clear args[]
+//----- Text Information Routines ------------------------------
+static Byte *end_screen(void)
+{
+ Byte *q;
+ int cnt;
- // look for optional address(es) :. :1 :1,9 :'q,'a :%
- buf = get_address(buf, &b, &e);
+ // find new bottom line
+ q = screenbegin;
+ for (cnt = 0; cnt < rows - 2; cnt++)
+ q = next_line(q);
+ q = end_line(q);
+ return (q);
+}
- // remember orig command line
- orig_buf = buf;
+static int count_lines(Byte * start, Byte * stop) // count line from start to stop
+{
+ Byte *q;
+ int cnt;
- // get the COMMAND into cmd[]
- buf1 = cmd;
- while (*buf != '\0') {
- if (isspace(*buf))
- break;
- *buf1++ = *buf++;
- }
- // get any ARGuments
- while (isblnk(*buf))
- buf++;
- strcpy((char *) args, (char *) buf);
- buf1 = last_char_is((char *)cmd, '!');
- if (buf1) {
- useforce = TRUE;
- *buf1 = '\0'; // get rid of !
+ if (stop < start) { // start and stop are backwards- reverse them
+ q = start;
+ start = stop;
+ stop = q;
}
- if (b >= 0) {
- // if there is only one addr, then the addr
- // is the line number of the single line the
- // user wants. So, reset the end
- // pointer to point at end of the "b" line
- q = find_line(b); // what line is #b
- r = end_line(q);
- li = 1;
+ cnt = 0;
+ stop = end_line(stop); // get to end of this line
+ for (q = start; q <= stop && q <= end - 1; q++) {
+ if (*q == '\n')
+ cnt++;
}
- if (e >= 0) {
- // we were given two addrs. change the
- // end pointer to the addr given by user.
- r = find_line(e); // what line is #e
- r = end_line(r);
- li = e - b + 1;
+ return (cnt);
+}
+
+static Byte *find_line(int li) // find begining of line #li
+{
+ Byte *q;
+
+ for (q = text; li > 1; li--) {
+ q = next_line(q);
}
- // ------------ now look for the command ------------
- i = strlen((char *) cmd);
- if (i == 0) { // :123CR goto line #123
- if (b >= 0) {
- dot = find_line(b); // what line is #b
- dot_skip_over_ws();
- }
- } else if (strncmp((char *) cmd, "!", 1) == 0) { // run a cmd
- // :!ls run the <cmd>
- (void) alarm(0); // wait for input- no alarms
- place_cursor(rows - 1, 0, FALSE); // go to Status line
- clear_to_eol(); // clear the line
- cookmode();
- system(orig_buf+1); // run the cmd
- rawmode();
- Hit_Return(); // let user see results
- (void) alarm(3); // done waiting for input
- } else if (strncmp((char *) cmd, "=", i) == 0) { // where is the address
- if (b < 0) { // no addr given- use defaults
- b = e = count_lines(text, dot);
- }
- psb("%d", b);
- } else if (strncasecmp((char *) cmd, "delete", i) == 0) { // delete lines
- if (b < 0) { // no addr given- use defaults
- q = begin_line(dot); // assume .,. for the range
- r = end_line(dot);
- }
- dot = yank_delete(q, r, 1, YANKDEL); // save, then delete lines
- dot_skip_over_ws();
- } else if (strncasecmp((char *) cmd, "edit", i) == 0) { // Edit a file
- int sr;
- sr= 0;
- // don't edit, if the current file has been modified
- if (file_modified && ! useforce) {
- psbs("No write since last change (:edit! overrides)");
- goto vc1;
- }
- if (strlen(args) > 0) {
- // the user supplied a file name
- fn= args;
- } else if (cfn != 0 && strlen(cfn) > 0) {
- // no user supplied name- use the current filename
- fn= cfn;
- goto vc5;
- } else {
- // no user file name, no current name- punt
- psbs("No current filename");
- goto vc1;
- }
+ return (q);
+}
- // see if file exists- if not, its just a new file request
- if ((sr=stat((char*)fn, &st_buf)) < 0) {
- // This is just a request for a new file creation.
- // The file_insert below will fail but we get
- // an empty buffer with a file name. Then the "write"
- // command can do the create.
- } else {
- if ((st_buf.st_mode & (S_IFREG)) == 0) {
- // This is not a regular file
- psbs("\"%s\" is not a regular file", fn);
- goto vc1;
- }
- if ((st_buf.st_mode & (S_IRUSR | S_IRGRP | S_IROTH)) == 0) {
- // dont have any read permissions
- psbs("\"%s\" is not readable", fn);
- goto vc1;
- }
+//----- Dot Movement Routines ----------------------------------
+static void dot_left(void)
+{
+ if (dot > text && dot[-1] != '\n')
+ dot--;
+}
+
+static void dot_right(void)
+{
+ if (dot < end - 1 && *dot != '\n')
+ dot++;
+}
+
+static void dot_begin(void)
+{
+ dot = begin_line(dot); // return pointer to first char cur line
+}
+
+static void dot_end(void)
+{
+ dot = end_line(dot); // return pointer to last char cur line
+}
+
+static Byte *move_to_col(Byte * p, int l)
+{
+ int co;
+
+ p = begin_line(p);
+ co = 0;
+ do {
+ if (*p == '\n' || *p == '\0')
+ break;
+ if (*p == '\t') {
+ // 7 - (co % 8 )
+ co += ((tabstop - 1) - (co % tabstop));
+ } else if (*p < ' ') {
+ co++; // display as ^X, use 2 columns
}
+ } while (++co <= l && p++ < end);
+ return (p);
+}
- // There is a read-able regular file
- // make this the current file
- q = (Byte *) xstrdup((char *) fn); // save the cfn
- if (cfn != 0)
- free(cfn); // free the old name
- cfn = q; // remember new cfn
+static void dot_next(void)
+{
+ dot = next_line(dot);
+}
- vc5:
- // delete all the contents of text[]
- new_text(2 * file_size(fn));
- screenbegin = dot = end = text;
+static void dot_prev(void)
+{
+ dot = prev_line(dot);
+}
- // insert new file
- ch = file_insert(fn, text, file_size(fn));
+static void dot_scroll(int cnt, int dir)
+{
+ Byte *q;
- if (ch < 1) {
- // start empty buf with dummy line
- (void) char_insert(text, '\n');
- ch= 1;
+ for (; cnt > 0; cnt--) {
+ if (dir < 0) {
+ // scroll Backwards
+ // ctrl-Y scroll up one line
+ screenbegin = prev_line(screenbegin);
+ } else {
+ // scroll Forwards
+ // ctrl-E scroll down one line
+ screenbegin = next_line(screenbegin);
}
- file_modified = FALSE;
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- if (Ureg >= 0 && Ureg < 28 && reg[Ureg] != 0) {
- free(reg[Ureg]); // free orig line reg- for 'U'
- reg[Ureg]= 0;
- }
- if (YDreg >= 0 && YDreg < 28 && reg[YDreg] != 0) {
- free(reg[YDreg]); // free default yank/delete register
- reg[YDreg]= 0;
- }
- for (li = 0; li < 28; li++) {
- mark[li] = 0;
- } // init the marks
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
- // how many lines in text[]?
- li = count_lines(text, end - 1);
- psb("\"%s\"%s"
-#ifdef CONFIG_FEATURE_VI_READONLY
- "%s"
-#endif /* CONFIG_FEATURE_VI_READONLY */
- " %dL, %dC", cfn,
- (sr < 0 ? " [New file]" : ""),
-#ifdef CONFIG_FEATURE_VI_READONLY
- ((vi_readonly || readonly) ? " [Read only]" : ""),
-#endif /* CONFIG_FEATURE_VI_READONLY */
- li, ch);
- } else if (strncasecmp((char *) cmd, "file", i) == 0) { // what File is this
- if (b != -1 || e != -1) {
- ni((Byte *) "No address allowed on this command");
- goto vc1;
- }
- if (strlen((char *) args) > 0) {
- // user wants a new filename
- if (cfn != NULL)
- free(cfn);
- cfn = (Byte *) xstrdup((char *) args);
- } else {
- // user wants file status info
- edit_status();
- }
- } else if (strncasecmp((char *) cmd, "features", i) == 0) { // what features are available
- // print out values of all features
- place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
- clear_to_eol(); // clear the line
- cookmode();
- show_help();
- rawmode();
- Hit_Return();
- } else if (strncasecmp((char *) cmd, "list", i) == 0) { // literal print line
- if (b < 0) { // no addr given- use defaults
- q = begin_line(dot); // assume .,. for the range
- r = end_line(dot);
- }
- place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
- clear_to_eol(); // clear the line
- write(1, "\r\n", 2);
- for (; q <= r; q++) {
- c = *q;
- if (c > '~')
- standout_start();
- if (c == '\n') {
- write(1, "$\r", 2);
- } else if (*q < ' ') {
- write(1, "^", 1);
- c += '@';
+ }
+ // make sure "dot" stays on the screen so we dont scroll off
+ if (dot < screenbegin)
+ dot = screenbegin;
+ q = end_screen(); // find new bottom line
+ if (dot > q)
+ dot = begin_line(q); // is dot is below bottom line?
+ dot_skip_over_ws();
+}
+
+static void dot_skip_over_ws(void)
+{
+ // skip WS
+ while (isspace(*dot) && *dot != '\n' && dot < end - 1)
+ dot++;
+}
+
+static void dot_delete(void) // delete the char at 'dot'
+{
+ (void) text_hole_delete(dot, dot);
+}
+
+static Byte *bound_dot(Byte * p) // make sure text[0] <= P < "end"
+{
+ if (p >= end && end > text) {
+ p = end - 1;
+ indicate_error('1');
+ }
+ if (p < text) {
+ p = text;
+ indicate_error('2');
+ }
+ return (p);
+}
+
+//----- Helper Utility Routines --------------------------------
+
+//----------------------------------------------------------------
+//----- Char Routines --------------------------------------------
+/* Chars that are part of a word-
+ * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
+ * Chars that are Not part of a word (stoppers)
+ * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
+ * Chars that are WhiteSpace
+ * TAB NEWLINE VT FF RETURN SPACE
+ * DO NOT COUNT NEWLINE AS WHITESPACE
+ */
+
+static Byte *new_screen(int ro, int co)
+{
+ int li;
+
+ if (screen != 0)
+ free(screen);
+ screensize = ro * co + 8;
+ screen = (Byte *) xmalloc(screensize);
+ // initialize the new screen. assume this will be a empty file.
+ screen_erase();
+ // non-existant text[] lines start with a tilde (~).
+ for (li = 1; li < ro - 1; li++) {
+ screen[(li * co) + 0] = '~';
+ }
+ return (screen);
+}
+
+static Byte *new_text(int size)
+{
+ if (size < 10240)
+ size = 10240; // have a minimum size for new files
+ if (text != 0) {
+ //text -= 4;
+ free(text);
+ }
+ text = (Byte *) xmalloc(size + 8);
+ memset(text, '\0', size); // clear new text[]
+ //text += 4; // leave some room for "oops"
+ textend = text + size - 1;
+ //textend -= 4; // leave some root for "oops"
+ return (text);
+}
+
+#ifdef CONFIG_FEATURE_VI_SEARCH
+static int mycmp(Byte * s1, Byte * s2, int len)
+{
+ int i;
+
+ i = strncmp((char *) s1, (char *) s2, len);
+#ifdef CONFIG_FEATURE_VI_SETOPTS
+ if (ignorecase) {
+ i = strncasecmp((char *) s1, (char *) s2, len);
+ }
+#endif /* CONFIG_FEATURE_VI_SETOPTS */
+ return (i);
+}
+
+static Byte *char_search(Byte * p, Byte * pat, int dir, int range) // search for pattern starting at p
+{
+#ifndef REGEX_SEARCH
+ Byte *start, *stop;
+ int len;
+
+ len = strlen((char *) pat);
+ if (dir == FORWARD) {
+ stop = end - 1; // assume range is p - end-1
+ if (range == LIMITED)
+ stop = next_line(p); // range is to next line
+ for (start = p; start < stop; start++) {
+ if (mycmp(start, pat, len) == 0) {
+ return (start);
}
- write(1, &c, 1);
- if (c > '~')
- standout_end();
}
-#ifdef CONFIG_FEATURE_VI_SET
- vc2:
-#endif /* CONFIG_FEATURE_VI_SET */
- Hit_Return();
- } else if ((strncasecmp((char *) cmd, "quit", i) == 0) || // Quit
- (strncasecmp((char *) cmd, "next", i) == 0)) { // edit next file
- if (useforce) {
- // force end of argv list
- if (*cmd == 'q') {
- optind = save_argc;
+ } else if (dir == BACK) {
+ stop = text; // assume range is text - p
+ if (range == LIMITED)
+ stop = prev_line(p); // range is to prev line
+ for (start = p - len; start >= stop; start--) {
+ if (mycmp(start, pat, len) == 0) {
+ return (start);
}
- editing = 0;
- goto vc1;
- }
- // don't exit if the file been modified
- if (file_modified) {
- psbs("No write since last change (:%s! overrides)",
- (*cmd == 'q' ? "quit" : "next"));
- goto vc1;
- }
- // are there other file to edit
- if (*cmd == 'q' && optind < save_argc - 1) {
- psbs("%d more file to edit", (save_argc - optind - 1));
- goto vc1;
- }
- if (*cmd == 'n' && optind >= save_argc - 1) {
- psbs("No more files to edit");
- goto vc1;
- }
- editing = 0;
- } else if (strncasecmp((char *) cmd, "read", i) == 0) { // read file into text[]
- fn = args;
- if (strlen((char *) fn) <= 0) {
- psbs("No filename given");
- goto vc1;
- }
- if (b < 0) { // no addr given- use defaults
- q = begin_line(dot); // assume "dot"
- }
- // read after current line- unless user said ":0r foo"
- if (b != 0)
- q = next_line(q);
-#ifdef CONFIG_FEATURE_VI_READONLY
- l= readonly; // remember current files' status
-#endif
- ch = file_insert(fn, q, file_size(fn));
-#ifdef CONFIG_FEATURE_VI_READONLY
- readonly= l;
-#endif
- if (ch < 0)
- goto vc1; // nothing was inserted
- // how many lines in text[]?
- li = count_lines(q, q + ch - 1);
- psb("\"%s\""
-#ifdef CONFIG_FEATURE_VI_READONLY
- "%s"
-#endif /* CONFIG_FEATURE_VI_READONLY */
- " %dL, %dC", fn,
-#ifdef CONFIG_FEATURE_VI_READONLY
- ((vi_readonly || readonly) ? " [Read only]" : ""),
-#endif /* CONFIG_FEATURE_VI_READONLY */
- li, ch);
- if (ch > 0) {
- // if the insert is before "dot" then we need to update
- if (q <= dot)
- dot += ch;
- file_modified = TRUE;
- }
- } else if (strncasecmp((char *) cmd, "rewind", i) == 0) { // rewind cmd line args
- if (file_modified && ! useforce) {
- psbs("No write since last change (:rewind! overrides)");
- } else {
- // reset the filenames to edit
- optind = fn_start - 1;
- editing = 0;
}
-#ifdef CONFIG_FEATURE_VI_SET
- } else if (strncasecmp((char *) cmd, "set", i) == 0) { // set or clear features
- i = 0; // offset into args
- if (strlen((char *) args) == 0) {
- // print out values of all options
- place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
- clear_to_eol(); // clear the line
- printf("----------------------------------------\r\n");
-#ifdef CONFIG_FEATURE_VI_SETOPTS
- if (!autoindent)
- printf("no");
- printf("autoindent ");
- if (!err_method)
- printf("no");
- printf("flash ");
- if (!ignorecase)
- printf("no");
- printf("ignorecase ");
- if (!showmatch)
- printf("no");
- printf("showmatch ");
- printf("tabstop=%d ", tabstop);
-#endif /* CONFIG_FEATURE_VI_SETOPTS */
- printf("\r\n");
- goto vc2;
- }
- if (strncasecmp((char *) args, "no", 2) == 0)
- i = 2; // ":set noautoindent"
-#ifdef CONFIG_FEATURE_VI_SETOPTS
- if (strncasecmp((char *) args + i, "autoindent", 10) == 0 ||
- strncasecmp((char *) args + i, "ai", 2) == 0) {
- autoindent = (i == 2) ? 0 : 1;
- }
- if (strncasecmp((char *) args + i, "flash", 5) == 0 ||
- strncasecmp((char *) args + i, "fl", 2) == 0) {
- err_method = (i == 2) ? 0 : 1;
- }
- if (strncasecmp((char *) args + i, "ignorecase", 10) == 0 ||
- strncasecmp((char *) args + i, "ic", 2) == 0) {
- ignorecase = (i == 2) ? 0 : 1;
- }
- if (strncasecmp((char *) args + i, "showmatch", 9) == 0 ||
- strncasecmp((char *) args + i, "sm", 2) == 0) {
- showmatch = (i == 2) ? 0 : 1;
- }
- if (strncasecmp((char *) args + i, "tabstop", 7) == 0) {
- sscanf(strchr((char *) args + i, '='), "=%d", &ch);
- if (ch > 0 && ch < columns - 1)
- tabstop = ch;
- }
-#endif /* CONFIG_FEATURE_VI_SETOPTS */
-#endif /* CONFIG_FEATURE_VI_SET */
-#ifdef CONFIG_FEATURE_VI_SEARCH
- } else if (strncasecmp((char *) cmd, "s", 1) == 0) { // substitute a pattern with a replacement pattern
- Byte *ls, *F, *R;
- int gflag;
-
- // F points to the "find" pattern
- // R points to the "replace" pattern
- // replace the cmd line delimiters "/" with NULLs
- gflag = 0; // global replace flag
- c = orig_buf[1]; // what is the delimiter
- F = orig_buf + 2; // start of "find"
- R = (Byte *) strchr((char *) F, c); // middle delimiter
- if (!R) goto colon_s_fail;
- *R++ = '\0'; // terminate "find"
- buf1 = (Byte *) strchr((char *) R, c);
- if (!buf1) goto colon_s_fail;
- *buf1++ = '\0'; // terminate "replace"
- if (*buf1 == 'g') { // :s/foo/bar/g
- buf1++;
- gflag++; // turn on gflag
- }
- q = begin_line(q);
- if (b < 0) { // maybe :s/foo/bar/
- q = begin_line(dot); // start with cur line
- b = count_lines(text, q); // cur line number
- }
- if (e < 0)
- e = b; // maybe :.s/foo/bar/
- for (i = b; i <= e; i++) { // so, :20,23 s \0 find \0 replace \0
- ls = q; // orig line start
- vc4:
- buf1 = char_search(q, F, FORWARD, LIMITED); // search cur line only for "find"
- if (buf1 != NULL) {
- // we found the "find" pattern- delete it
- (void) text_hole_delete(buf1, buf1 + strlen((char *) F) - 1);
- // inset the "replace" patern
- (void) string_insert(buf1, R); // insert the string
- // check for "global" :s/foo/bar/g
- if (gflag == 1) {
- if ((buf1 + strlen((char *) R)) < end_line(ls)) {
- q = buf1 + strlen((char *) R);
- goto vc4; // don't let q move past cur line
- }
- }
- }
- q = next_line(ls);
- }
-#endif /* CONFIG_FEATURE_VI_SEARCH */
- } else if (strncasecmp((char *) cmd, "version", i) == 0) { // show software version
- psb("%s", vi_Version);
- } else if ((strncasecmp((char *) cmd, "write", i) == 0) || // write text to file
- (strncasecmp((char *) cmd, "wq", i) == 0) ||
- (strncasecmp((char *) cmd, "x", i) == 0)) {
- // is there a file name to write to?
- if (strlen((char *) args) > 0) {
- fn = args;
- }
-#ifdef CONFIG_FEATURE_VI_READONLY
- if ((vi_readonly || readonly) && ! useforce) {
- psbs("\"%s\" File is read only", fn);
- goto vc3;
- }
-#endif /* CONFIG_FEATURE_VI_READONLY */
- // how many lines in text[]?
- li = count_lines(q, r);
- ch = r - q + 1;
- // see if file exists- if not, its just a new file request
- if (useforce) {
- // if "fn" is not write-able, chmod u+w
- // sprintf(syscmd, "chmod u+w %s", fn);
- // system(syscmd);
- forced = TRUE;
- }
- l = file_write(fn, q, r);
- if (useforce && forced) {
- // chmod u-w
- // sprintf(syscmd, "chmod u-w %s", fn);
- // system(syscmd);
- forced = FALSE;
- }
- psb("\"%s\" %dL, %dC", fn, li, l);
- if (q == text && r == end - 1 && l == ch)
- file_modified = FALSE;
- if ((cmd[0] == 'x' || cmd[1] == 'q') && l == ch) {
- editing = 0;
- }
-#ifdef CONFIG_FEATURE_VI_READONLY
- vc3:;
-#endif /* CONFIG_FEATURE_VI_READONLY */
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- } else if (strncasecmp((char *) cmd, "yank", i) == 0) { // yank lines
- if (b < 0) { // no addr given- use defaults
- q = begin_line(dot); // assume .,. for the range
- r = end_line(dot);
- }
- text_yank(q, r, YDreg);
- li = count_lines(q, r);
- psb("Yank %d lines (%d chars) into [%c]",
- li, strlen((char *) reg[YDreg]), what_reg());
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
- } else {
- // cmd unknown
- ni((Byte *) cmd);
}
- vc1:
- dot = bound_dot(dot); // make sure "dot" is valid
- return;
-#ifdef CONFIG_FEATURE_VI_SEARCH
-colon_s_fail:
- psb(":s expression missing delimiters");
- return;
-#endif
+ // pattern not found
+ return (NULL);
+#else /*REGEX_SEARCH */
+ char *q;
+ struct re_pattern_buffer preg;
+ int i;
+ int size, range;
-}
+ re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
+ preg.translate = 0;
+ preg.fastmap = 0;
+ preg.buffer = 0;
+ preg.allocated = 0;
-static void Hit_Return(void)
-{
- char c;
+ // assume a LIMITED forward search
+ q = next_line(p);
+ q = end_line(q);
+ q = end - 1;
+ if (dir == BACK) {
+ q = prev_line(p);
+ q = text;
+ }
+ // count the number of chars to search over, forward or backward
+ size = q - p;
+ if (size < 0)
+ size = p - q;
+ // RANGE could be negative if we are searching backwards
+ range = q - p;
- standout_start(); // start reverse video
- write(1, "[Hit return to continue]", 24);
- standout_end(); // end reverse video
- while ((c = get_one_char()) != '\n' && c != '\r') /*do nothing */
- ;
- redraw(TRUE); // force redraw all
+ q = (char *) re_compile_pattern(pat, strlen((char *) pat), &preg);
+ if (q != 0) {
+ // The pattern was not compiled
+ psbs("bad search pattern: \"%s\": %s", pat, q);
+ i = 0; // return p if pattern not compiled
+ goto cs1;
+ }
+
+ q = p;
+ if (range < 0) {
+ q = p - size;
+ if (q < text)
+ q = text;
+ }
+ // search for the compiled pattern, preg, in p[]
+ // range < 0- search backward
+ // range > 0- search forward
+ // 0 < start < size
+ // re_search() < 0 not found or error
+ // re_search() > 0 index of found pattern
+ // struct pattern char int int int struct reg
+ // re_search (*pattern_buffer, *string, size, start, range, *regs)
+ i = re_search(&preg, q, size, 0, range, 0);
+ if (i == -1) {
+ p = 0;
+ i = 0; // return NULL if pattern not found
+ }
+ cs1:
+ if (dir == FORWARD) {
+ p = p + i;
+ } else {
+ p = p - i;
+ }
+ return (p);
+#endif /*REGEX_SEARCH */
}
-#endif /* CONFIG_FEATURE_VI_COLON */
+#endif /* CONFIG_FEATURE_VI_SEARCH */
-//----- Synchronize the cursor to Dot --------------------------
-static void sync_cursor(Byte * d, int *row, int *col)
+static Byte *char_insert(Byte * p, Byte c) // insert the char c at 'p'
{
- Byte *beg_cur, *end_cur; // begin and end of "d" line
- Byte *beg_scr, *end_scr; // begin and end of screen
- Byte *tp;
- int cnt, ro, co;
-
- beg_cur = begin_line(d); // first char of cur line
- end_cur = end_line(d); // last char of cur line
-
- beg_scr = end_scr = screenbegin; // first char of screen
- end_scr = end_screen(); // last char of screen
-
- if (beg_cur < screenbegin) {
- // "d" is before top line on screen
- // how many lines do we have to move
- cnt = count_lines(beg_cur, screenbegin);
- sc1:
- screenbegin = beg_cur;
- if (cnt > (rows - 1) / 2) {
- // we moved too many lines. put "dot" in middle of screen
- for (cnt = 0; cnt < (rows - 1) / 2; cnt++) {
- screenbegin = prev_line(screenbegin);
- }
- }
- } else if (beg_cur > end_scr) {
- // "d" is after bottom line on screen
- // how many lines do we have to move
- cnt = count_lines(end_scr, beg_cur);
- if (cnt > (rows - 1) / 2)
- goto sc1; // too many lines
- for (ro = 0; ro < cnt - 1; ro++) {
- // move screen begin the same amount
- screenbegin = next_line(screenbegin);
- // now, move the end of screen
- end_scr = next_line(end_scr);
- end_scr = end_line(end_scr);
+ if (c == 22) { // Is this an ctrl-V?
+ p = stupid_insert(p, '^'); // use ^ to indicate literal next
+ p--; // backup onto ^
+ refresh(FALSE); // show the ^
+ c = get_one_char();
+ *p = c;
+ p++;
+ file_modified = TRUE; // has the file been modified
+ } else if (c == 27) { // Is this an ESC?
+ cmd_mode = 0;
+ cmdcnt = 0;
+ end_cmd_q(); // stop adding to q
+ strcpy((char *) status_buffer, " "); // clear the status buffer
+ if ((p[-1] != '\n') && (dot>text)) {
+ p--;
}
- }
- // "d" is on screen- find out which row
- tp = screenbegin;
- for (ro = 0; ro < rows - 1; ro++) { // drive "ro" to correct row
- if (tp == beg_cur)
- break;
- tp = next_line(tp);
- }
+ } else if (c == erase_char) { // Is this a BS
+ // 123456789
+ if ((p[-1] != '\n') && (dot>text)) {
+ p--;
+ p = text_hole_delete(p, p); // shrink buffer 1 char
+#ifdef CONFIG_FEATURE_VI_DOT_CMD
+ // also rmove char from last_modifying_cmd
+ if (strlen((char *) last_modifying_cmd) > 0) {
+ Byte *q;
- // find out what col "d" is on
- co = 0;
- do { // drive "co" to correct column
- if (*tp == '\n' || *tp == '\0')
- break;
- if (*tp == '\t') {
- // 7 - (co % 8 )
- co += ((tabstop - 1) - (co % tabstop));
- } else if (*tp < ' ') {
- co++; // display as ^X, use 2 columns
+ q = last_modifying_cmd;
+ q[strlen((char *) q) - 1] = '\0'; // erase BS
+ q[strlen((char *) q) - 1] = '\0'; // erase prev char
+ }
+#endif /* CONFIG_FEATURE_VI_DOT_CMD */
}
- } while (tp++ < d && ++co);
+ } else {
+ // insert a char into text[]
+ Byte *sp; // "save p"
- // "co" is the column where "dot" is.
- // The screen has "columns" columns.
- // The currently displayed columns are 0+offset -- columns+ofset
- // |-------------------------------------------------------------|
- // ^ ^ ^
- // offset | |------- columns ----------------|
- //
- // If "co" is already in this range then we do not have to adjust offset
- // but, we do have to subtract the "offset" bias from "co".
- // If "co" is outside this range then we have to change "offset".
- // If the first char of a line is a tab the cursor will try to stay
- // in column 7, but we have to set offset to 0.
+ if (c == 13)
+ c = '\n'; // translate \r to \n
+ sp = p; // remember addr of insert
+ p = stupid_insert(p, c); // insert the char
+#ifdef CONFIG_FEATURE_VI_SETOPTS
+ if (showmatch && strchr(")]}", *sp) != NULL) {
+ showmatching(sp);
+ }
+ if (autoindent && c == '\n') { // auto indent the new line
+ Byte *q;
- if (co < 0 + offset) {
- offset = co;
- }
- if (co >= columns + offset) {
- offset = co - columns + 1;
- }
- // if the first char of the line is a tab, and "dot" is sitting on it
- // force offset to 0.
- if (d == beg_cur && *d == '\t') {
- offset = 0;
+ q = prev_line(p); // use prev line as templet
+ for (; isblnk(*q); q++) {
+ p = stupid_insert(p, *q); // insert the char
+ }
+ }
+#endif /* CONFIG_FEATURE_VI_SETOPTS */
}
- co -= offset;
-
- *row = ro;
- *col = co;
-}
-
-//----- Text Movement Routines ---------------------------------
-static Byte *begin_line(Byte * p) // return pointer to first char cur line
-{
- while (p > text && p[-1] != '\n')
- p--; // go to cur line B-o-l
return (p);
}
-static Byte *end_line(Byte * p) // return pointer to NL of cur line line
+static Byte *stupid_insert(Byte * p, Byte c) // stupidly insert the char c at 'p'
{
- while (p < end - 1 && *p != '\n')
- p++; // go to cur line E-o-l
+ p = text_hole_make(p, 1);
+ if (p != 0) {
+ *p = c;
+ file_modified = TRUE; // has the file been modified
+ p++;
+ }
return (p);
}
-static Byte *dollar_line(Byte * p) // return pointer to just before NL line
+static Byte find_range(Byte ** start, Byte ** stop, Byte c)
{
- while (p < end - 1 && *p != '\n')
- p++; // go to cur line E-o-l
- // Try to stay off of the Newline
- if (*p == '\n' && (p - begin_line(p)) > 0)
- p--;
- return (p);
-}
+ Byte *save_dot, *p, *q;
+ int cnt;
-static Byte *prev_line(Byte * p) // return pointer first char prev line
-{
- p = begin_line(p); // goto begining of cur line
- if (p[-1] == '\n' && p > text)
- p--; // step to prev line
- p = begin_line(p); // goto begining of prev line
- return (p);
-}
+ save_dot = dot;
+ p = q = dot;
-static Byte *next_line(Byte * p) // return pointer first char next line
-{
- p = end_line(p);
- if (*p == '\n' && p < end - 1)
- p++; // step to next line
- return (p);
+ if (strchr("cdy><", c)) {
+ // these cmds operate on whole lines
+ p = q = begin_line(p);
+ for (cnt = 1; cnt < cmdcnt; cnt++) {
+ q = next_line(q);
+ }
+ q = end_line(q);
+ } else if (strchr("^%$0bBeEft", c)) {
+ // These cmds operate on char positions
+ do_cmd(c); // execute movement cmd
+ q = dot;
+ } else if (strchr("wW", c)) {
+ do_cmd(c); // execute movement cmd
+ if (dot > text)
+ dot--; // move back off of next word
+ if (dot > text && *dot == '\n')
+ dot--; // stay off NL
+ q = dot;
+ } else if (strchr("H-k{", c)) {
+ // these operate on multi-lines backwards
+ q = end_line(dot); // find NL
+ do_cmd(c); // execute movement cmd
+ dot_begin();
+ p = dot;
+ } else if (strchr("L+j}\r\n", c)) {
+ // these operate on multi-lines forwards
+ p = begin_line(dot);
+ do_cmd(c); // execute movement cmd
+ dot_end(); // find NL
+ q = dot;
+ } else {
+ c = 27; // error- return an ESC char
+ //break;
+ }
+ *start = p;
+ *stop = q;
+ if (q < p) {
+ *start = q;
+ *stop = p;
+ }
+ dot = save_dot;
+ return (c);
}
-//----- Text Information Routines ------------------------------
-static Byte *end_screen(void)
+static int st_test(Byte * p, int type, int dir, Byte * tested)
{
- Byte *q;
- int cnt;
-
- // find new bottom line
- q = screenbegin;
- for (cnt = 0; cnt < rows - 2; cnt++)
- q = next_line(q);
- q = end_line(q);
- return (q);
-}
+ Byte c, c0, ci;
+ int test, inc;
-static int count_lines(Byte * start, Byte * stop) // count line from start to stop
-{
- Byte *q;
- int cnt;
+ inc = dir;
+ c = c0 = p[0];
+ ci = p[inc];
+ test = 0;
- if (stop < start) { // start and stop are backwards- reverse them
- q = start;
- start = stop;
- stop = q;
+ if (type == S_BEFORE_WS) {
+ c = ci;
+ test = ((!isspace(c)) || c == '\n');
}
- cnt = 0;
- stop = end_line(stop); // get to end of this line
- for (q = start; q <= stop && q <= end - 1; q++) {
- if (*q == '\n')
- cnt++;
+ if (type == S_TO_WS) {
+ c = c0;
+ test = ((!isspace(c)) || c == '\n');
}
- return (cnt);
+ if (type == S_OVER_WS) {
+ c = c0;
+ test = ((isspace(c)));
+ }
+ if (type == S_END_PUNCT) {
+ c = ci;
+ test = ((ispunct(c)));
+ }
+ if (type == S_END_ALNUM) {
+ c = ci;
+ test = ((isalnum(c)) || c == '_');
+ }
+ *tested = c;
+ return (test);
}
-static Byte *find_line(int li) // find begining of line #li
+static Byte *skip_thing(Byte * p, int linecnt, int dir, int type)
{
- Byte *q;
+ Byte c;
- for (q = text; li > 1; li--) {
- q = next_line(q);
- }
- return (q);
+ while (st_test(p, type, dir, &c)) {
+ // make sure we limit search to correct number of lines
+ if (c == '\n' && --linecnt < 1)
+ break;
+ if (dir >= 0 && p >= end - 1)
+ break;
+ if (dir < 0 && p <= text)
+ break;
+ p += dir; // move to next char
+ }
+ return (p);
}
-//----- Dot Movement Routines ----------------------------------
-static void dot_left(void)
+// find matching char of pair () [] {}
+static Byte *find_pair(Byte * p, Byte c)
{
- if (dot > text && dot[-1] != '\n')
- dot--;
-}
+ Byte match, *q;
+ int dir, level;
-static void dot_right(void)
-{
- if (dot < end - 1 && *dot != '\n')
- dot++;
+ match = ')';
+ level = 1;
+ dir = 1; // assume forward
+ switch (c) {
+ case '(':
+ match = ')';
+ break;
+ case '[':
+ match = ']';
+ break;
+ case '{':
+ match = '}';
+ break;
+ case ')':
+ match = '(';
+ dir = -1;
+ break;
+ case ']':
+ match = '[';
+ dir = -1;
+ break;
+ case '}':
+ match = '{';
+ dir = -1;
+ break;
+ }
+ for (q = p + dir; text <= q && q < end; q += dir) {
+ // look for match, count levels of pairs (( ))
+ if (*q == c)
+ level++; // increase pair levels
+ if (*q == match)
+ level--; // reduce pair level
+ if (level == 0)
+ break; // found matching pair
+ }
+ if (level != 0)
+ q = NULL; // indicate no match
+ return (q);
}
-static void dot_begin(void)
+#ifdef CONFIG_FEATURE_VI_SETOPTS
+// show the matching char of a pair, () [] {}
+static void showmatching(Byte * p)
{
- dot = begin_line(dot); // return pointer to first char cur line
-}
+ Byte *q, *save_dot;
-static void dot_end(void)
-{
- dot = end_line(dot); // return pointer to last char cur line
+ // we found half of a pair
+ q = find_pair(p, *p); // get loc of matching char
+ if (q == NULL) {
+ indicate_error('3'); // no matching char
+ } else {
+ // "q" now points to matching pair
+ save_dot = dot; // remember where we are
+ dot = q; // go to new loc
+ refresh(FALSE); // let the user see it
+ (void) mysleep(40); // give user some time
+ dot = save_dot; // go back to old loc
+ refresh(FALSE);
+ }
}
+#endif /* CONFIG_FEATURE_VI_SETOPTS */
-static Byte *move_to_col(Byte * p, int l)
+// open a hole in text[]
+static Byte *text_hole_make(Byte * p, int size) // at "p", make a 'size' byte hole
{
- int co;
+ Byte *src, *dest;
+ int cnt;
- p = begin_line(p);
- co = 0;
- do {
- if (*p == '\n' || *p == '\0')
- break;
- if (*p == '\t') {
- // 7 - (co % 8 )
- co += ((tabstop - 1) - (co % tabstop));
- } else if (*p < ' ') {
- co++; // display as ^X, use 2 columns
- }
- } while (++co <= l && p++ < end);
+ if (size <= 0)
+ goto thm0;
+ src = p;
+ dest = p + size;
+ cnt = end - src; // the rest of buffer
+ if (memmove(dest, src, cnt) != dest) {
+ psbs("can't create room for new characters");
+ }
+ memset(p, ' ', size); // clear new hole
+ end = end + size; // adjust the new END
+ file_modified = TRUE; // has the file been modified
+ thm0:
return (p);
}
-static void dot_next(void)
+// close a hole in text[]
+static Byte *text_hole_delete(Byte * p, Byte * q) // delete "p" thru "q", inclusive
{
- dot = next_line(dot);
-}
+ Byte *src, *dest;
+ int cnt, hole_size;
-static void dot_prev(void)
-{
- dot = prev_line(dot);
+ // move forwards, from beginning
+ // assume p <= q
+ src = q + 1;
+ dest = p;
+ if (q < p) { // they are backward- swap them
+ src = p + 1;
+ dest = q;
+ }
+ hole_size = q - p + 1;
+ cnt = end - src;
+ if (src < text || src > end)
+ goto thd0;
+ if (dest < text || dest >= end)
+ goto thd0;
+ if (src >= end)
+ goto thd_atend; // just delete the end of the buffer
+ if (memmove(dest, src, cnt) != dest) {
+ psbs("can't delete the character");
+ }
+ thd_atend:
+ end = end - hole_size; // adjust the new END
+ if (dest >= end)
+ dest = end - 1; // make sure dest in below end-1
+ if (end <= text)
+ dest = end = text; // keep pointers valid
+ file_modified = TRUE; // has the file been modified
+ thd0:
+ return (dest);
}
-static void dot_scroll(int cnt, int dir)
+// copy text into register, then delete text.
+// if dist <= 0, do not include, or go past, a NewLine
+//
+static Byte *yank_delete(Byte * start, Byte * stop, int dist, int yf)
{
- Byte *q;
+ Byte *p;
- for (; cnt > 0; cnt--) {
- if (dir < 0) {
- // scroll Backwards
- // ctrl-Y scroll up one line
- screenbegin = prev_line(screenbegin);
- } else {
- // scroll Forwards
- // ctrl-E scroll down one line
- screenbegin = next_line(screenbegin);
+ // make sure start <= stop
+ if (start > stop) {
+ // they are backwards, reverse them
+ p = start;
+ start = stop;
+ stop = p;
+ }
+ if (dist <= 0) {
+ // we can not cross NL boundaries
+ p = start;
+ if (*p == '\n')
+ return (p);
+ // dont go past a NewLine
+ for (; p + 1 <= stop; p++) {
+ if (p[1] == '\n') {
+ stop = p; // "stop" just before NewLine
+ break;
+ }
}
}
- // make sure "dot" stays on the screen so we dont scroll off
- if (dot < screenbegin)
- dot = screenbegin;
- q = end_screen(); // find new bottom line
- if (dot > q)
- dot = begin_line(q); // is dot is below bottom line?
- dot_skip_over_ws();
-}
-
-static void dot_skip_over_ws(void)
-{
- // skip WS
- while (isspace(*dot) && *dot != '\n' && dot < end - 1)
- dot++;
+ p = start;
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ text_yank(start, stop, YDreg);
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+ if (yf == YANKDEL) {
+ p = text_hole_delete(start, stop);
+ } // delete lines
+ return (p);
}
-static void dot_delete(void) // delete the char at 'dot'
+static void show_help(void)
{
- (void) text_hole_delete(dot, dot);
+ puts("These features are available:"
+#ifdef CONFIG_FEATURE_VI_SEARCH
+ "\n\tPattern searches with / and ?"
+#endif /* CONFIG_FEATURE_VI_SEARCH */
+#ifdef CONFIG_FEATURE_VI_DOT_CMD
+ "\n\tLast command repeat with \'.\'"
+#endif /* CONFIG_FEATURE_VI_DOT_CMD */
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ "\n\tLine marking with 'x"
+ "\n\tNamed buffers with \"x"
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+#ifdef CONFIG_FEATURE_VI_READONLY
+ "\n\tReadonly if vi is called as \"view\""
+ "\n\tReadonly with -R command line arg"
+#endif /* CONFIG_FEATURE_VI_READONLY */
+#ifdef CONFIG_FEATURE_VI_SET
+ "\n\tSome colon mode commands with \':\'"
+#endif /* CONFIG_FEATURE_VI_SET */
+#ifdef CONFIG_FEATURE_VI_SETOPTS
+ "\n\tSettable options with \":set\""
+#endif /* CONFIG_FEATURE_VI_SETOPTS */
+#ifdef CONFIG_FEATURE_VI_USE_SIGNALS
+ "\n\tSignal catching- ^C"
+ "\n\tJob suspend and resume with ^Z"
+#endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
+#ifdef CONFIG_FEATURE_VI_WIN_RESIZE
+ "\n\tAdapt to window re-sizes"
+#endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
+ );
}
-static Byte *bound_dot(Byte * p) // make sure text[0] <= P < "end"
+extern inline void print_literal(Byte * buf, Byte * s) // copy s to buf, convert unprintable
{
- if (p >= end && end > text) {
- p = end - 1;
- indicate_error('1');
- }
- if (p < text) {
- p = text;
- indicate_error('2');
- }
- return (p);
-}
+ Byte c, b[2];
-//----- Helper Utility Routines --------------------------------
+ b[1] = '\0';
+ strcpy((char *) buf, ""); // init buf
+ if (strlen((char *) s) <= 0)
+ s = (Byte *) "(NULL)";
+ for (; *s > '\0'; s++) {
+ c = *s;
+ if (*s > '~') {
+ strcat((char *) buf, SOs);
+ c = *s - 128;
+ }
+ if (*s < ' ') {
+ strcat((char *) buf, "^");
+ c += '@';
+ }
+ b[0] = c;
+ strcat((char *) buf, (char *) b);
+ if (*s > '~')
+ strcat((char *) buf, SOn);
+ if (*s == '\n') {
+ strcat((char *) buf, "$");
+ }
+ }
+}
-//----------------------------------------------------------------
-//----- Char Routines --------------------------------------------
-/* Chars that are part of a word-
- * 0123456789_ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz
- * Chars that are Not part of a word (stoppers)
- * !"#$%&'()*+,-./:;<=>?@[\]^`{|}~
- * Chars that are WhiteSpace
- * TAB NEWLINE VT FF RETURN SPACE
- * DO NOT COUNT NEWLINE AS WHITESPACE
- */
+#ifdef CONFIG_FEATURE_VI_DOT_CMD
+static void start_new_cmd_q(Byte c)
+{
+ // release old cmd
+ if (last_modifying_cmd != 0)
+ free(last_modifying_cmd);
+ // get buffer for new cmd
+ last_modifying_cmd = (Byte *) xmalloc(BUFSIZ);
+ memset(last_modifying_cmd, '\0', BUFSIZ); // clear new cmd queue
+ // if there is a current cmd count put it in the buffer first
+ if (cmdcnt > 0)
+ sprintf((char *) last_modifying_cmd, "%d", cmdcnt);
+ // save char c onto queue
+ last_modifying_cmd[strlen((char *) last_modifying_cmd)] = c;
+ adding2q = 1;
+ return;
+}
-static Byte *new_screen(int ro, int co)
+static void end_cmd_q(void)
{
- int li;
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ YDreg = 26; // go back to default Yank/Delete reg
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+ adding2q = 0;
+ return;
+}
+#endif /* CONFIG_FEATURE_VI_DOT_CMD */
- if (screen != 0)
- free(screen);
- screensize = ro * co + 8;
- screen = (Byte *) xmalloc(screensize);
- // initialize the new screen. assume this will be a empty file.
- screen_erase();
- // non-existant text[] lines start with a tilde (~).
- for (li = 1; li < ro - 1; li++) {
- screen[(li * co) + 0] = '~';
+#if defined(CONFIG_FEATURE_VI_YANKMARK) || defined(CONFIG_FEATURE_VI_COLON) || defined(CONFIG_FEATURE_VI_CRASHME)
+static Byte *string_insert(Byte * p, Byte * s) // insert the string at 'p'
+{
+ int cnt, i;
+
+ i = strlen((char *) s);
+ p = text_hole_make(p, i);
+ strncpy((char *) p, (char *) s, i);
+ for (cnt = 0; *s != '\0'; s++) {
+ if (*s == '\n')
+ cnt++;
}
- return (screen);
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ psb("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+ return (p);
}
+#endif /* CONFIG_FEATURE_VI_YANKMARK || CONFIG_FEATURE_VI_COLON || CONFIG_FEATURE_VI_CRASHME */
-static Byte *new_text(int size)
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+static Byte *text_yank(Byte * p, Byte * q, int dest) // copy text into a register
{
- if (size < 10240)
- size = 10240; // have a minimum size for new files
- if (text != 0) {
- //text -= 4;
- free(text);
+ Byte *t;
+ int cnt;
+
+ if (q < p) { // they are backwards- reverse them
+ t = q;
+ q = p;
+ p = t;
}
- text = (Byte *) xmalloc(size + 8);
- memset(text, '\0', size); // clear new text[]
- //text += 4; // leave some room for "oops"
- textend = text + size - 1;
- //textend -= 4; // leave some root for "oops"
- return (text);
+ cnt = q - p + 1;
+ t = reg[dest];
+ if (t != 0) { // if already a yank register
+ free(t); // free it
+ }
+ t = (Byte *) xmalloc(cnt + 1); // get a new register
+ memset(t, '\0', cnt + 1); // clear new text[]
+ strncpy((char *) t, (char *) p, cnt); // copy text[] into bufer
+ reg[dest] = t;
+ return (p);
}
-#ifdef CONFIG_FEATURE_VI_SEARCH
-static int mycmp(Byte * s1, Byte * s2, int len)
+static Byte what_reg(void)
{
+ Byte c;
int i;
- i = strncmp((char *) s1, (char *) s2, len);
-#ifdef CONFIG_FEATURE_VI_SETOPTS
- if (ignorecase) {
- i = strncasecmp((char *) s1, (char *) s2, len);
- }
-#endif /* CONFIG_FEATURE_VI_SETOPTS */
- return (i);
+ i = 0;
+ c = 'D'; // default to D-reg
+ if (0 <= YDreg && YDreg <= 25)
+ c = 'a' + (Byte) YDreg;
+ if (YDreg == 26)
+ c = 'D';
+ if (YDreg == 27)
+ c = 'U';
+ return (c);
}
-static Byte *char_search(Byte * p, Byte * pat, int dir, int range) // search for pattern starting at p
+static void check_context(Byte cmd)
{
-#ifndef REGEX_SEARCH
- Byte *start, *stop;
- int len;
+ // A context is defined to be "modifying text"
+ // Any modifying command establishes a new context.
- len = strlen((char *) pat);
- if (dir == FORWARD) {
- stop = end - 1; // assume range is p - end-1
- if (range == LIMITED)
- stop = next_line(p); // range is to next line
- for (start = p; start < stop; start++) {
- if (mycmp(start, pat, len) == 0) {
- return (start);
- }
- }
- } else if (dir == BACK) {
- stop = text; // assume range is text - p
- if (range == LIMITED)
- stop = prev_line(p); // range is to prev line
- for (start = p - len; start >= stop; start--) {
- if (mycmp(start, pat, len) == 0) {
- return (start);
- }
+ if (dot < context_start || dot > context_end) {
+ if (strchr((char *) modifying_cmds, cmd) != NULL) {
+ // we are trying to modify text[]- make this the current context
+ mark[27] = mark[26]; // move cur to prev
+ mark[26] = dot; // move local to cur
+ context_start = prev_line(prev_line(dot));
+ context_end = next_line(next_line(dot));
+ //loiter= start_loiter= now;
}
}
- // pattern not found
- return (NULL);
-#else /*REGEX_SEARCH */
- char *q;
- struct re_pattern_buffer preg;
- int i;
- int size, range;
-
- re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
- preg.translate = 0;
- preg.fastmap = 0;
- preg.buffer = 0;
- preg.allocated = 0;
-
- // assume a LIMITED forward search
- q = next_line(p);
- q = end_line(q);
- q = end - 1;
- if (dir == BACK) {
- q = prev_line(p);
- q = text;
- }
- // count the number of chars to search over, forward or backward
- size = q - p;
- if (size < 0)
- size = p - q;
- // RANGE could be negative if we are searching backwards
- range = q - p;
+ return;
+}
- q = (char *) re_compile_pattern(pat, strlen((char *) pat), &preg);
- if (q != 0) {
- // The pattern was not compiled
- psbs("bad search pattern: \"%s\": %s", pat, q);
- i = 0; // return p if pattern not compiled
- goto cs1;
- }
+extern inline Byte *swap_context(Byte * p) // goto new context for '' command make this the current context
+{
+ Byte *tmp;
- q = p;
- if (range < 0) {
- q = p - size;
- if (q < text)
- q = text;
- }
- // search for the compiled pattern, preg, in p[]
- // range < 0- search backward
- // range > 0- search forward
- // 0 < start < size
- // re_search() < 0 not found or error
- // re_search() > 0 index of found pattern
- // struct pattern char int int int struct reg
- // re_search (*pattern_buffer, *string, size, start, range, *regs)
- i = re_search(&preg, q, size, 0, range, 0);
- if (i == -1) {
- p = 0;
- i = 0; // return NULL if pattern not found
- }
- cs1:
- if (dir == FORWARD) {
- p = p + i;
- } else {
- p = p - i;
+ // the current context is in mark[26]
+ // the previous context is in mark[27]
+ // only swap context if other context is valid
+ if (text <= mark[27] && mark[27] <= end - 1) {
+ tmp = mark[27];
+ mark[27] = mark[26];
+ mark[26] = tmp;
+ p = mark[26]; // where we are going- previous context
+ context_start = prev_line(prev_line(prev_line(p)));
+ context_end = next_line(next_line(next_line(p)));
}
return (p);
-#endif /*REGEX_SEARCH */
}
-#endif /* CONFIG_FEATURE_VI_SEARCH */
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
-static Byte *char_insert(Byte * p, Byte c) // insert the char c at 'p'
+static int isblnk(Byte c) // is the char a blank or tab
{
- if (c == 22) { // Is this an ctrl-V?
- p = stupid_insert(p, '^'); // use ^ to indicate literal next
- p--; // backup onto ^
- refresh(FALSE); // show the ^
- c = get_one_char();
- *p = c;
- p++;
- file_modified = TRUE; // has the file been modified
- } else if (c == 27) { // Is this an ESC?
- cmd_mode = 0;
- cmdcnt = 0;
- end_cmd_q(); // stop adding to q
- strcpy((char *) status_buffer, " "); // clear the status buffer
- if ((p[-1] != '\n') && (dot>text)) {
- p--;
- }
- } else if (c == erase_char) { // Is this a BS
- // 123456789
- if ((p[-1] != '\n') && (dot>text)) {
- p--;
- p = text_hole_delete(p, p); // shrink buffer 1 char
-#ifdef CONFIG_FEATURE_VI_DOT_CMD
- // also rmove char from last_modifying_cmd
- if (strlen((char *) last_modifying_cmd) > 0) {
- Byte *q;
-
- q = last_modifying_cmd;
- q[strlen((char *) q) - 1] = '\0'; // erase BS
- q[strlen((char *) q) - 1] = '\0'; // erase prev char
- }
-#endif /* CONFIG_FEATURE_VI_DOT_CMD */
- }
- } else {
- // insert a char into text[]
- Byte *sp; // "save p"
-
- if (c == 13)
- c = '\n'; // translate \r to \n
- sp = p; // remember addr of insert
- p = stupid_insert(p, c); // insert the char
-#ifdef CONFIG_FEATURE_VI_SETOPTS
- if (showmatch && strchr(")]}", *sp) != NULL) {
- showmatching(sp);
- }
- if (autoindent && c == '\n') { // auto indent the new line
- Byte *q;
-
- q = prev_line(p); // use prev line as templet
- for (; isblnk(*q); q++) {
- p = stupid_insert(p, *q); // insert the char
- }
- }
-#endif /* CONFIG_FEATURE_VI_SETOPTS */
- }
- return (p);
+ return (c == ' ' || c == '\t');
}
-static Byte *stupid_insert(Byte * p, Byte c) // stupidly insert the char c at 'p'
+//----- Set terminal attributes --------------------------------
+static void rawmode(void)
{
- p = text_hole_make(p, 1);
- if (p != 0) {
- *p = c;
- file_modified = TRUE; // has the file been modified
- p++;
- }
- return (p);
+ tcgetattr(0, &term_orig);
+ term_vi = term_orig;
+ term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
+ term_vi.c_iflag &= (~IXON & ~ICRNL);
+ term_vi.c_oflag &= (~ONLCR);
+#ifndef linux
+ term_vi.c_cc[VMIN] = 1;
+ term_vi.c_cc[VTIME] = 0;
+#endif
+ erase_char = term_vi.c_cc[VERASE];
+ tcsetattr(0, TCSANOW, &term_vi);
}
-static Byte find_range(Byte ** start, Byte ** stop, Byte c)
+static void cookmode(void)
{
- Byte *save_dot, *p, *q;
- int cnt;
-
- save_dot = dot;
- p = q = dot;
-
- if (strchr("cdy><", c)) {
- // these cmds operate on whole lines
- p = q = begin_line(p);
- for (cnt = 1; cnt < cmdcnt; cnt++) {
- q = next_line(q);
- }
- q = end_line(q);
- } else if (strchr("^%$0bBeEft", c)) {
- // These cmds operate on char positions
- do_cmd(c); // execute movement cmd
- q = dot;
- } else if (strchr("wW", c)) {
- do_cmd(c); // execute movement cmd
- if (dot > text)
- dot--; // move back off of next word
- if (dot > text && *dot == '\n')
- dot--; // stay off NL
- q = dot;
- } else if (strchr("H-k{", c)) {
- // these operate on multi-lines backwards
- q = end_line(dot); // find NL
- do_cmd(c); // execute movement cmd
- dot_begin();
- p = dot;
- } else if (strchr("L+j}\r\n", c)) {
- // these operate on multi-lines forwards
- p = begin_line(dot);
- do_cmd(c); // execute movement cmd
- dot_end(); // find NL
- q = dot;
- } else {
- c = 27; // error- return an ESC char
- //break;
- }
- *start = p;
- *stop = q;
- if (q < p) {
- *start = q;
- *stop = p;
- }
- dot = save_dot;
- return (c);
+ tcsetattr(0, TCSANOW, &term_orig);
}
-static int st_test(Byte * p, int type, int dir, Byte * tested)
+#ifdef CONFIG_FEATURE_VI_WIN_RESIZE
+//----- See what the window size currently is --------------------
+static void window_size_get(int sig)
{
- Byte c, c0, ci;
- int test, inc;
-
- inc = dir;
- c = c0 = p[0];
- ci = p[inc];
- test = 0;
+ int i;
- if (type == S_BEFORE_WS) {
- c = ci;
- test = ((!isspace(c)) || c == '\n');
- }
- if (type == S_TO_WS) {
- c = c0;
- test = ((!isspace(c)) || c == '\n');
- }
- if (type == S_OVER_WS) {
- c = c0;
- test = ((isspace(c)));
+ i = ioctl(0, TIOCGWINSZ, &winsize);
+ if (i != 0) {
+ // force 24x80
+ winsize.ws_row = 24;
+ winsize.ws_col = 80;
}
- if (type == S_END_PUNCT) {
- c = ci;
- test = ((ispunct(c)));
+ if (winsize.ws_row <= 1) {
+ winsize.ws_row = 24;
}
- if (type == S_END_ALNUM) {
- c = ci;
- test = ((isalnum(c)) || c == '_');
+ if (winsize.ws_col <= 1) {
+ winsize.ws_col = 80;
}
- *tested = c;
- return (test);
+ rows = (int) winsize.ws_row;
+ columns = (int) winsize.ws_col;
}
+#endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
-static Byte *skip_thing(Byte * p, int linecnt, int dir, int type)
+//----- Come here when we get a window resize signal ---------
+#ifdef CONFIG_FEATURE_VI_USE_SIGNALS
+static void winch_sig(int sig)
{
- Byte c;
-
- while (st_test(p, type, dir, &c)) {
- // make sure we limit search to correct number of lines
- if (c == '\n' && --linecnt < 1)
- break;
- if (dir >= 0 && p >= end - 1)
- break;
- if (dir < 0 && p <= text)
- break;
- p += dir; // move to next char
- }
- return (p);
+ signal(SIGWINCH, winch_sig);
+#ifdef CONFIG_FEATURE_VI_WIN_RESIZE
+ window_size_get(0);
+#endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
+ new_screen(rows, columns); // get memory for virtual screen
+ redraw(TRUE); // re-draw the screen
}
-// find matching char of pair () [] {}
-static Byte *find_pair(Byte * p, Byte c)
+//----- Come here when we get a continue signal -------------------
+static void cont_sig(int sig)
{
- Byte match, *q;
- int dir, level;
+ rawmode(); // terminal to "raw"
+ *status_buffer = '\0'; // clear the status buffer
+ redraw(TRUE); // re-draw the screen
- match = ')';
- level = 1;
- dir = 1; // assume forward
- switch (c) {
- case '(':
- match = ')';
- break;
- case '[':
- match = ']';
- break;
- case '{':
- match = '}';
- break;
- case ')':
- match = '(';
- dir = -1;
- break;
- case ']':
- match = '[';
- dir = -1;
- break;
- case '}':
- match = '{';
- dir = -1;
- break;
- }
- for (q = p + dir; text <= q && q < end; q += dir) {
- // look for match, count levels of pairs (( ))
- if (*q == c)
- level++; // increase pair levels
- if (*q == match)
- level--; // reduce pair level
- if (level == 0)
- break; // found matching pair
- }
- if (level != 0)
- q = NULL; // indicate no match
- return (q);
+ signal(SIGTSTP, suspend_sig);
+ signal(SIGCONT, SIG_DFL);
+ kill(getpid(), SIGCONT);
}
-#ifdef CONFIG_FEATURE_VI_SETOPTS
-// show the matching char of a pair, () [] {}
-static void showmatching(Byte * p)
+//----- Come here when we get a Suspend signal -------------------
+static void suspend_sig(int sig)
{
- Byte *q, *save_dot;
+ place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
+ clear_to_eol(); // Erase to end of line
+ cookmode(); // terminal to "cooked"
- // we found half of a pair
- q = find_pair(p, *p); // get loc of matching char
- if (q == NULL) {
- indicate_error('3'); // no matching char
- } else {
- // "q" now points to matching pair
- save_dot = dot; // remember where we are
- dot = q; // go to new loc
- refresh(FALSE); // let the user see it
- (void) mysleep(40); // give user some time
- dot = save_dot; // go back to old loc
- refresh(FALSE);
- }
+ signal(SIGCONT, cont_sig);
+ signal(SIGTSTP, SIG_DFL);
+ kill(getpid(), SIGTSTP);
}
-#endif /* CONFIG_FEATURE_VI_SETOPTS */
-// open a hole in text[]
-static Byte *text_hole_make(Byte * p, int size) // at "p", make a 'size' byte hole
+//----- Come here when we get a signal ---------------------------
+static void catch_sig(int sig)
{
- Byte *src, *dest;
- int cnt;
-
- if (size <= 0)
- goto thm0;
- src = p;
- dest = p + size;
- cnt = end - src; // the rest of buffer
- if (memmove(dest, src, cnt) != dest) {
- psbs("can't create room for new characters");
- }
- memset(p, ' ', size); // clear new hole
- end = end + size; // adjust the new END
- file_modified = TRUE; // has the file been modified
- thm0:
- return (p);
+ signal(SIGHUP, catch_sig);
+ signal(SIGINT, catch_sig);
+ signal(SIGTERM, catch_sig);
+ longjmp(restart, sig);
}
-// close a hole in text[]
-static Byte *text_hole_delete(Byte * p, Byte * q) // delete "p" thru "q", inclusive
+static void alarm_sig(int sig)
{
- Byte *src, *dest;
- int cnt, hole_size;
-
- // move forwards, from beginning
- // assume p <= q
- src = q + 1;
- dest = p;
- if (q < p) { // they are backward- swap them
- src = p + 1;
- dest = q;
- }
- hole_size = q - p + 1;
- cnt = end - src;
- if (src < text || src > end)
- goto thd0;
- if (dest < text || dest >= end)
- goto thd0;
- if (src >= end)
- goto thd_atend; // just delete the end of the buffer
- if (memmove(dest, src, cnt) != dest) {
- psbs("can't delete the character");
- }
- thd_atend:
- end = end - hole_size; // adjust the new END
- if (dest >= end)
- dest = end - 1; // make sure dest in below end-1
- if (end <= text)
- dest = end = text; // keep pointers valid
- file_modified = TRUE; // has the file been modified
- thd0:
- return (dest);
+ signal(SIGALRM, catch_sig);
+ longjmp(restart, sig);
}
-// copy text into register, then delete text.
-// if dist <= 0, do not include, or go past, a NewLine
-//
-static Byte *yank_delete(Byte * start, Byte * stop, int dist, int yf)
+//----- Come here when we get a core dump signal -----------------
+static void core_sig(int sig)
{
- Byte *p;
+ signal(SIGQUIT, core_sig);
+ signal(SIGILL, core_sig);
+ signal(SIGTRAP, core_sig);
+ signal(SIGIOT, core_sig);
+ signal(SIGABRT, core_sig);
+ signal(SIGFPE, core_sig);
+ signal(SIGBUS, core_sig);
+ signal(SIGSEGV, core_sig);
+#ifdef SIGSYS
+ signal(SIGSYS, core_sig);
+#endif
- // make sure start <= stop
- if (start > stop) {
- // they are backwards, reverse them
- p = start;
- start = stop;
- stop = p;
- }
- if (dist <= 0) {
- // we can not cross NL boundaries
- p = start;
- if (*p == '\n')
- return (p);
- // dont go past a NewLine
- for (; p + 1 <= stop; p++) {
- if (p[1] == '\n') {
- stop = p; // "stop" just before NewLine
- break;
- }
- }
- }
- p = start;
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- text_yank(start, stop, YDreg);
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
- if (yf == YANKDEL) {
- p = text_hole_delete(start, stop);
- } // delete lines
- return (p);
-}
+ dot = bound_dot(dot); // make sure "dot" is valid
-static void show_help(void)
-{
- puts("These features are available:"
-#ifdef CONFIG_FEATURE_VI_SEARCH
- "\n\tPattern searches with / and ?"
-#endif /* CONFIG_FEATURE_VI_SEARCH */
-#ifdef CONFIG_FEATURE_VI_DOT_CMD
- "\n\tLast command repeat with \'.\'"
-#endif /* CONFIG_FEATURE_VI_DOT_CMD */
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- "\n\tLine marking with 'x"
- "\n\tNamed buffers with \"x"
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
-#ifdef CONFIG_FEATURE_VI_READONLY
- "\n\tReadonly if vi is called as \"view\""
- "\n\tReadonly with -R command line arg"
-#endif /* CONFIG_FEATURE_VI_READONLY */
-#ifdef CONFIG_FEATURE_VI_SET
- "\n\tSome colon mode commands with \':\'"
-#endif /* CONFIG_FEATURE_VI_SET */
-#ifdef CONFIG_FEATURE_VI_SETOPTS
- "\n\tSettable options with \":set\""
-#endif /* CONFIG_FEATURE_VI_SETOPTS */
-#ifdef CONFIG_FEATURE_VI_USE_SIGNALS
- "\n\tSignal catching- ^C"
- "\n\tJob suspend and resume with ^Z"
-#endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
-#ifdef CONFIG_FEATURE_VI_WIN_RESIZE
- "\n\tAdapt to window re-sizes"
-#endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
- );
+ longjmp(restart, sig);
}
+#endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
-static void print_literal(Byte * buf, Byte * s) // copy s to buf, convert unprintable
+static int mysleep(int hund) // sleep for 'h' 1/100 seconds
{
- Byte c, b[2];
-
- b[1] = '\0';
- strcpy((char *) buf, ""); // init buf
- if (strlen((char *) s) <= 0)
- s = (Byte *) "(NULL)";
- for (; *s > '\0'; s++) {
- c = *s;
- if (*s > '~') {
- strcat((char *) buf, SOs);
- c = *s - 128;
- }
- if (*s < ' ') {
- strcat((char *) buf, "^");
- c += '@';
- }
- b[0] = c;
- strcat((char *) buf, (char *) b);
- if (*s > '~')
- strcat((char *) buf, SOn);
- if (*s == '\n') {
- strcat((char *) buf, "$");
- }
- }
+ // Don't hang- Wait 5/100 seconds- 1 Sec= 1000000
+ FD_ZERO(&rfds);
+ FD_SET(0, &rfds);
+ tv.tv_sec = 0;
+ tv.tv_usec = hund * 10000;
+ select(1, &rfds, NULL, NULL, &tv);
+ return (FD_ISSET(0, &rfds));
}
-#ifdef CONFIG_FEATURE_VI_DOT_CMD
-static void start_new_cmd_q(Byte c)
+//----- IO Routines --------------------------------------------
+static Byte readit(void) // read (maybe cursor) key from stdin
{
- // release old cmd
- if (last_modifying_cmd != 0)
- free(last_modifying_cmd);
- // get buffer for new cmd
- last_modifying_cmd = (Byte *) xmalloc(BUFSIZ);
- memset(last_modifying_cmd, '\0', BUFSIZ); // clear new cmd queue
- // if there is a current cmd count put it in the buffer first
- if (cmdcnt > 0)
- sprintf((char *) last_modifying_cmd, "%d", cmdcnt);
- // save char c onto queue
- last_modifying_cmd[strlen((char *) last_modifying_cmd)] = c;
- adding2q = 1;
- return;
-}
+ Byte c;
+ int i, bufsiz, cnt, cmdindex;
+ struct esc_cmds {
+ Byte *seq;
+ Byte val;
+ };
-static void end_cmd_q(void)
-{
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- YDreg = 26; // go back to default Yank/Delete reg
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
- adding2q = 0;
- return;
-}
-#endif /* CONFIG_FEATURE_VI_DOT_CMD */
+ static struct esc_cmds esccmds[] = {
+ {(Byte *) "OA", (Byte) VI_K_UP}, // cursor key Up
+ {(Byte *) "OB", (Byte) VI_K_DOWN}, // cursor key Down
+ {(Byte *) "OC", (Byte) VI_K_RIGHT}, // Cursor Key Right
+ {(Byte *) "OD", (Byte) VI_K_LEFT}, // cursor key Left
+ {(Byte *) "OH", (Byte) VI_K_HOME}, // Cursor Key Home
+ {(Byte *) "OF", (Byte) VI_K_END}, // Cursor Key End
+ {(Byte *) "", (Byte) VI_K_UP}, // cursor key Up
+ {(Byte *) "", (Byte) VI_K_DOWN}, // cursor key Down
+ {(Byte *) "", (Byte) VI_K_RIGHT}, // Cursor Key Right
+ {(Byte *) "", (Byte) VI_K_LEFT}, // cursor key Left
+ {(Byte *) "", (Byte) VI_K_HOME}, // Cursor Key Home
+ {(Byte *) "", (Byte) VI_K_END}, // Cursor Key End
+ {(Byte *) "[2~", (Byte) VI_K_INSERT}, // Cursor Key Insert
+ {(Byte *) "[5~", (Byte) VI_K_PAGEUP}, // Cursor Key Page Up
+ {(Byte *) "[6~", (Byte) VI_K_PAGEDOWN}, // Cursor Key Page Down
+ {(Byte *) "OP", (Byte) VI_K_FUN1}, // Function Key F1
+ {(Byte *) "OQ", (Byte) VI_K_FUN2}, // Function Key F2
+ {(Byte *) "OR", (Byte) VI_K_FUN3}, // Function Key F3
+ {(Byte *) "OS", (Byte) VI_K_FUN4}, // Function Key F4
+ {(Byte *) "[15~", (Byte) VI_K_FUN5}, // Function Key F5
+ {(Byte *) "[17~", (Byte) VI_K_FUN6}, // Function Key F6
+ {(Byte *) "[18~", (Byte) VI_K_FUN7}, // Function Key F7
+ {(Byte *) "[19~", (Byte) VI_K_FUN8}, // Function Key F8
+ {(Byte *) "[20~", (Byte) VI_K_FUN9}, // Function Key F9
+ {(Byte *) "[21~", (Byte) VI_K_FUN10}, // Function Key F10
+ {(Byte *) "[23~", (Byte) VI_K_FUN11}, // Function Key F11
+ {(Byte *) "[24~", (Byte) VI_K_FUN12}, // Function Key F12
+ {(Byte *) "[11~", (Byte) VI_K_FUN1}, // Function Key F1
+ {(Byte *) "[12~", (Byte) VI_K_FUN2}, // Function Key F2
+ {(Byte *) "[13~", (Byte) VI_K_FUN3}, // Function Key F3
+ {(Byte *) "[14~", (Byte) VI_K_FUN4}, // Function Key F4
+ };
-#if defined(CONFIG_FEATURE_VI_YANKMARK) || defined(CONFIG_FEATURE_VI_COLON) || defined(CONFIG_FEATURE_VI_CRASHME)
-static Byte *string_insert(Byte * p, Byte * s) // insert the string at 'p'
-{
- int cnt, i;
+#define ESCCMDS_COUNT (sizeof(esccmds)/sizeof(struct esc_cmds))
- i = strlen((char *) s);
- p = text_hole_make(p, i);
- strncpy((char *) p, (char *) s, i);
- for (cnt = 0; *s != '\0'; s++) {
- if (*s == '\n')
- cnt++;
+ (void) alarm(0); // turn alarm OFF while we wait for input
+ // get input from User- are there already input chars in Q?
+ bufsiz = strlen((char *) readbuffer);
+ if (bufsiz <= 0) {
+ ri0:
+ // the Q is empty, wait for a typed char
+ bufsiz = read(0, readbuffer, BUFSIZ - 1);
+ if (bufsiz < 0) {
+ if (errno == EINTR)
+ goto ri0; // interrupted sys call
+ if (errno == EBADF)
+ editing = 0;
+ if (errno == EFAULT)
+ editing = 0;
+ if (errno == EINVAL)
+ editing = 0;
+ if (errno == EIO)
+ editing = 0;
+ errno = 0;
+ bufsiz = 0;
+ }
+ readbuffer[bufsiz] = '\0';
}
-#ifdef CONFIG_FEATURE_VI_YANKMARK
- psb("Put %d lines (%d chars) from [%c]", cnt, i, what_reg());
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
- return (p);
-}
-#endif /* CONFIG_FEATURE_VI_YANKMARK || CONFIG_FEATURE_VI_COLON || CONFIG_FEATURE_VI_CRASHME */
+ // return char if it is not part of ESC sequence
+ if (readbuffer[0] != 27)
+ goto ri1;
-#ifdef CONFIG_FEATURE_VI_YANKMARK
-static Byte *text_yank(Byte * p, Byte * q, int dest) // copy text into a register
-{
- Byte *t;
- int cnt;
+ // This is an ESC char. Is this Esc sequence?
+ // Could be bare Esc key. See if there are any
+ // more chars to read after the ESC. This would
+ // be a Function or Cursor Key sequence.
+ FD_ZERO(&rfds);
+ FD_SET(0, &rfds);
+ tv.tv_sec = 0;
+ tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000
- if (q < p) { // they are backwards- reverse them
- t = q;
- q = p;
- p = t;
+ // keep reading while there are input chars and room in buffer
+ while (select(1, &rfds, NULL, NULL, &tv) > 0 && bufsiz <= (BUFSIZ - 5)) {
+ // read the rest of the ESC string
+ i = read(0, (void *) (readbuffer + bufsiz), BUFSIZ - bufsiz);
+ if (i > 0) {
+ bufsiz += i;
+ readbuffer[bufsiz] = '\0'; // Terminate the string
+ }
}
- cnt = q - p + 1;
- t = reg[dest];
- if (t != 0) { // if already a yank register
- free(t); // free it
+ // Maybe cursor or function key?
+ for (cmdindex = 0; cmdindex < ESCCMDS_COUNT; cmdindex++) {
+ cnt = strlen((char *) esccmds[cmdindex].seq);
+ i = strncmp((char *) esccmds[cmdindex].seq, (char *) readbuffer, cnt);
+ if (i == 0) {
+ // is a Cursor key- put derived value back into Q
+ readbuffer[0] = esccmds[cmdindex].val;
+ // squeeze out the ESC sequence
+ for (i = 1; i < cnt; i++) {
+ memmove(readbuffer + 1, readbuffer + 2, BUFSIZ - 2);
+ readbuffer[BUFSIZ - 1] = '\0';
+ }
+ break;
+ }
}
- t = (Byte *) xmalloc(cnt + 1); // get a new register
- memset(t, '\0', cnt + 1); // clear new text[]
- strncpy((char *) t, (char *) p, cnt); // copy text[] into bufer
- reg[dest] = t;
- return (p);
-}
-
-static Byte what_reg(void)
-{
- Byte c;
- int i;
-
- i = 0;
- c = 'D'; // default to D-reg
- if (0 <= YDreg && YDreg <= 25)
- c = 'a' + (Byte) YDreg;
- if (YDreg == 26)
- c = 'D';
- if (YDreg == 27)
- c = 'U';
+ ri1:
+ c = readbuffer[0];
+ // remove one char from Q
+ memmove(readbuffer, readbuffer + 1, BUFSIZ - 1);
+ readbuffer[BUFSIZ - 1] = '\0';
+ (void) alarm(3); // we are done waiting for input, turn alarm ON
return (c);
}
-static void check_context(Byte cmd)
+//----- IO Routines --------------------------------------------
+static Byte get_one_char()
{
- // A context is defined to be "modifying text"
- // Any modifying command establishes a new context.
+ static Byte c;
- if (dot < context_start || dot > context_end) {
- if (strchr((char *) modifying_cmds, cmd) != NULL) {
- // we are trying to modify text[]- make this the current context
- mark[27] = mark[26]; // move cur to prev
- mark[26] = dot; // move local to cur
- context_start = prev_line(prev_line(dot));
- context_end = next_line(next_line(dot));
- //loiter= start_loiter= now;
+#ifdef CONFIG_FEATURE_VI_DOT_CMD
+ // ! adding2q && ioq == 0 read()
+ // ! adding2q && ioq != 0 *ioq
+ // adding2q *last_modifying_cmd= read()
+ if (!adding2q) {
+ // we are not adding to the q.
+ // but, we may be reading from a q
+ if (ioq == 0) {
+ // there is no current q, read from STDIN
+ c = readit(); // get the users input
+ } else {
+ // there is a queue to get chars from first
+ c = *ioq++;
+ if (c == '\0') {
+ // the end of the q, read from STDIN
+ free(ioq_start);
+ ioq_start = ioq = 0;
+ c = readit(); // get the users input
+ }
+ }
+ } else {
+ // adding STDIN chars to q
+ c = readit(); // get the users input
+ if (last_modifying_cmd != 0) {
+ // add new char to q
+ last_modifying_cmd[strlen((char *) last_modifying_cmd)] = c;
}
}
- return;
+#else /* CONFIG_FEATURE_VI_DOT_CMD */
+ c = readit(); // get the users input
+#endif /* CONFIG_FEATURE_VI_DOT_CMD */
+ return (c); // return the char, where ever it came from
}
-static Byte *swap_context(Byte * p) // goto new context for '' command make this the current context
+static Byte *get_input_line(Byte * prompt) // get input line- use "status line"
{
- Byte *tmp;
+ Byte buf[BUFSIZ];
+ Byte c;
+ int i;
+ static Byte *obufp = NULL;
- // the current context is in mark[26]
- // the previous context is in mark[27]
- // only swap context if other context is valid
- if (text <= mark[27] && mark[27] <= end - 1) {
- tmp = mark[27];
- mark[27] = mark[26];
- mark[26] = tmp;
- p = mark[26]; // where we are going- previous context
- context_start = prev_line(prev_line(prev_line(p)));
- context_end = next_line(next_line(next_line(p)));
- }
- return (p);
-}
-#endif /* CONFIG_FEATURE_VI_YANKMARK */
+ strcpy((char *) buf, (char *) prompt);
+ *status_buffer = '\0'; // clear the status buffer
+ place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
+ clear_to_eol(); // clear the line
+ write(1, prompt, strlen((char *) prompt)); // write out the :, /, or ? prompt
-static int isblnk(Byte c) // is the char a blank or tab
-{
- return (c == ' ' || c == '\t');
+ for (i = strlen((char *) buf); i < BUFSIZ;) {
+ c = get_one_char(); // read user input
+ if (c == '\n' || c == '\r' || c == 27)
+ break; // is this end of input
+ if (c == erase_char) { // user wants to erase prev char
+ i--; // backup to prev char
+ buf[i] = '\0'; // erase the char
+ buf[i + 1] = '\0'; // null terminate buffer
+ write(1, " ", 3); // erase char on screen
+ if (i <= 0) { // user backs up before b-o-l, exit
+ break;
+ }
+ } else {
+ buf[i] = c; // save char in buffer
+ buf[i + 1] = '\0'; // make sure buffer is null terminated
+ write(1, buf + i, 1); // echo the char back to user
+ i++;
+ }
+ }
+ refresh(FALSE);
+ if (obufp != NULL)
+ free(obufp);
+ obufp = (Byte *) xstrdup((char *) buf);
+ return (obufp);
}
-//----- Set terminal attributes --------------------------------
-static void rawmode(void)
+static int file_size(Byte * fn) // what is the byte size of "fn"
{
- tcgetattr(0, &term_orig);
- term_vi = term_orig;
- term_vi.c_lflag &= (~ICANON & ~ECHO); // leave ISIG ON- allow intr's
- term_vi.c_iflag &= (~IXON & ~ICRNL);
- term_vi.c_oflag &= (~ONLCR);
-#ifndef linux
- term_vi.c_cc[VMIN] = 1;
- term_vi.c_cc[VTIME] = 0;
-#endif
- erase_char = term_vi.c_cc[VERASE];
- tcsetattr(0, TCSANOW, &term_vi);
-}
+ struct stat st_buf;
+ int cnt, sr;
-static void cookmode(void)
-{
- tcsetattr(0, TCSANOW, &term_orig);
+ if (fn == 0 || strlen(fn) <= 0)
+ return (-1);
+ cnt = -1;
+ sr = stat((char *) fn, &st_buf); // see if file exists
+ if (sr >= 0) {
+ cnt = (int) st_buf.st_size;
+ }
+ return (cnt);
}
-#ifdef CONFIG_FEATURE_VI_WIN_RESIZE
-//----- See what the window size currently is --------------------
-static void window_size_get(int sig)
+static int file_insert(Byte * fn, Byte * p, int size)
{
- int i;
+ int fd, cnt;
- i = ioctl(0, TIOCGWINSZ, &winsize);
- if (i != 0) {
- // force 24x80
- winsize.ws_row = 24;
- winsize.ws_col = 80;
+ cnt = -1;
+#ifdef CONFIG_FEATURE_VI_READONLY
+ readonly = FALSE;
+#endif /* CONFIG_FEATURE_VI_READONLY */
+ if (fn == 0 || strlen((char*) fn) <= 0) {
+ psbs("No filename given");
+ goto fi0;
}
- if (winsize.ws_row <= 1) {
- winsize.ws_row = 24;
+ if (size == 0) {
+ // OK- this is just a no-op
+ cnt = 0;
+ goto fi0;
}
- if (winsize.ws_col <= 1) {
- winsize.ws_col = 80;
+ if (size < 0) {
+ psbs("Trying to insert a negative number (%d) of characters", size);
+ goto fi0;
}
- rows = (int) winsize.ws_row;
- columns = (int) winsize.ws_col;
+ if (p < text || p > end) {
+ psbs("Trying to insert file outside of memory");
+ goto fi0;
+ }
+
+ // see if we can open the file
+#ifdef CONFIG_FEATURE_VI_READONLY
+ if (vi_readonly) goto fi1; // do not try write-mode
+#endif
+ fd = open((char *) fn, O_RDWR); // assume read & write
+ if (fd < 0) {
+ // could not open for writing- maybe file is read only
+#ifdef CONFIG_FEATURE_VI_READONLY
+ fi1:
+#endif
+ fd = open((char *) fn, O_RDONLY); // try read-only
+ if (fd < 0) {
+ psbs("\"%s\" %s", fn, "could not open file");
+ goto fi0;
+ }
+#ifdef CONFIG_FEATURE_VI_READONLY
+ // got the file- read-only
+ readonly = TRUE;
+#endif /* CONFIG_FEATURE_VI_READONLY */
+ }
+ p = text_hole_make(p, size);
+ cnt = read(fd, p, size);
+ close(fd);
+ if (cnt < 0) {
+ cnt = -1;
+ p = text_hole_delete(p, p + size - 1); // un-do buffer insert
+ psbs("could not read file \"%s\"", fn);
+ } else if (cnt < size) {
+ // There was a partial read, shrink unused space text[]
+ p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
+ psbs("could not read all of file \"%s\"", fn);
+ }
+ if (cnt >= size)
+ file_modified = TRUE;
+ fi0:
+ return (cnt);
}
-#endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
-//----- Come here when we get a window resize signal ---------
-#ifdef CONFIG_FEATURE_VI_USE_SIGNALS
-static void winch_sig(int sig)
+static int file_write(Byte * fn, Byte * first, Byte * last)
{
- signal(SIGWINCH, winch_sig);
-#ifdef CONFIG_FEATURE_VI_WIN_RESIZE
- window_size_get(0);
-#endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
- new_screen(rows, columns); // get memory for virtual screen
- redraw(TRUE); // re-draw the screen
+ int fd, cnt, charcnt;
+
+ if (fn == 0) {
+ psbs("No current filename");
+ return (-1);
+ }
+ charcnt = 0;
+ // FIXIT- use the correct umask()
+ fd = open((char *) fn, (O_WRONLY | O_CREAT | O_TRUNC), 0664);
+ if (fd < 0)
+ return (-1);
+ cnt = last - first + 1;
+ charcnt = write(fd, first, cnt);
+ if (charcnt == cnt) {
+ // good write
+ //file_modified= FALSE; // the file has not been modified
+ } else {
+ charcnt = 0;
+ }
+ close(fd);
+ return (charcnt);
}
-//----- Come here when we get a continue signal -------------------
-static void cont_sig(int sig)
+//----- Terminal Drawing ---------------------------------------
+// The terminal is made up of 'rows' line of 'columns' columns.
+// classicly this would be 24 x 80.
+// screen coordinates
+// 0,0 ... 0,79
+// 1,0 ... 1,79
+// . ... .
+// . ... .
+// 22,0 ... 22,79
+// 23,0 ... 23,79 status line
+//
+
+//----- Move the cursor to row x col (count from 0, not 1) -------
+static void place_cursor(int row, int col, int opti)
{
- rawmode(); // terminal to "raw"
- *status_buffer = '\0'; // clear the status buffer
- redraw(TRUE); // re-draw the screen
+ char cm1[BUFSIZ];
+ char *cm;
+ int l;
+#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
+ char cm2[BUFSIZ];
+ Byte *screenp;
+ // char cm3[BUFSIZ];
+ int Rrow= last_row;
+#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
+
+ memset(cm1, '\0', BUFSIZ - 1); // clear the buffer
- signal(SIGTSTP, suspend_sig);
- signal(SIGCONT, SIG_DFL);
- kill(getpid(), SIGCONT);
+ if (row < 0) row = 0;
+ if (row >= rows) row = rows - 1;
+ if (col < 0) col = 0;
+ if (col >= columns) col = columns - 1;
+
+ //----- 1. Try the standard terminal ESC sequence
+ sprintf((char *) cm1, CMrc, row + 1, col + 1);
+ cm= cm1;
+ if (! opti) goto pc0;
+
+#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
+ //----- find the minimum # of chars to move cursor -------------
+ //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
+ memset(cm2, '\0', BUFSIZ - 1); // clear the buffer
+
+ // move to the correct row
+ while (row < Rrow) {
+ // the cursor has to move up
+ strcat(cm2, CMup);
+ Rrow--;
+ }
+ while (row > Rrow) {
+ // the cursor has to move down
+ strcat(cm2, CMdown);
+ Rrow++;
+ }
+
+ // now move to the correct column
+ strcat(cm2, "\r"); // start at col 0
+ // just send out orignal source char to get to correct place
+ screenp = &screen[row * columns]; // start of screen line
+ strncat(cm2, screenp, col);
+
+ //----- 3. Try some other way of moving cursor
+ //---------------------------------------------
+
+ // pick the shortest cursor motion to send out
+ cm= cm1;
+ if (strlen(cm2) < strlen(cm)) {
+ cm= cm2;
+ } /* else if (strlen(cm3) < strlen(cm)) {
+ cm= cm3;
+ } */
+#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
+ pc0:
+ l= strlen(cm);
+ if (l) write(1, cm, l); // move the cursor
}
-//----- Come here when we get a Suspend signal -------------------
-static void suspend_sig(int sig)
+//----- Erase from cursor to end of line -----------------------
+static void clear_to_eol()
{
- place_cursor(rows - 1, 0, FALSE); // go to bottom of screen
- clear_to_eol(); // Erase to end of line
- cookmode(); // terminal to "cooked"
+ write(1, Ceol, strlen(Ceol)); // Erase from cursor to end of line
+}
- signal(SIGCONT, cont_sig);
- signal(SIGTSTP, SIG_DFL);
- kill(getpid(), SIGTSTP);
+//----- Erase from cursor to end of screen -----------------------
+static void clear_to_eos()
+{
+ write(1, Ceos, strlen(Ceos)); // Erase from cursor to end of screen
}
-//----- Come here when we get a signal ---------------------------
-static void catch_sig(int sig)
+//----- Start standout mode ------------------------------------
+static void standout_start() // send "start reverse video" sequence
{
- signal(SIGHUP, catch_sig);
- signal(SIGINT, catch_sig);
- signal(SIGTERM, catch_sig);
- longjmp(restart, sig);
+ write(1, SOs, strlen(SOs)); // Start reverse video mode
}
-static void alarm_sig(int sig)
+//----- End standout mode --------------------------------------
+static void standout_end() // send "end reverse video" sequence
{
- signal(SIGALRM, catch_sig);
- longjmp(restart, sig);
+ write(1, SOn, strlen(SOn)); // End reverse video mode
}
-//----- Come here when we get a core dump signal -----------------
-static void core_sig(int sig)
+//----- Flash the screen --------------------------------------
+static void flash(int h)
{
- signal(SIGQUIT, core_sig);
- signal(SIGILL, core_sig);
- signal(SIGTRAP, core_sig);
- signal(SIGIOT, core_sig);
- signal(SIGABRT, core_sig);
- signal(SIGFPE, core_sig);
- signal(SIGBUS, core_sig);
- signal(SIGSEGV, core_sig);
-#ifdef SIGSYS
- signal(SIGSYS, core_sig);
-#endif
+ standout_start(); // send "start reverse video" sequence
+ redraw(TRUE);
+ (void) mysleep(h);
+ standout_end(); // send "end reverse video" sequence
+ redraw(TRUE);
+}
- dot = bound_dot(dot); // make sure "dot" is valid
+static void beep()
+{
+ write(1, bell, strlen(bell)); // send out a bell character
+}
- longjmp(restart, sig);
+static void indicate_error(char c)
+{
+#ifdef CONFIG_FEATURE_VI_CRASHME
+ if (crashme > 0)
+ return; // generate a random command
+#endif /* CONFIG_FEATURE_VI_CRASHME */
+ if (err_method == 0) {
+ beep();
+ } else {
+ flash(10);
+ }
}
-#endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
-static int mysleep(int hund) // sleep for 'h' 1/100 seconds
+//----- Screen[] Routines --------------------------------------
+//----- Erase the Screen[] memory ------------------------------
+static void screen_erase()
{
- // Don't hang- Wait 5/100 seconds- 1 Sec= 1000000
- FD_ZERO(&rfds);
- FD_SET(0, &rfds);
- tv.tv_sec = 0;
- tv.tv_usec = hund * 10000;
- select(1, &rfds, NULL, NULL, &tv);
- return (FD_ISSET(0, &rfds));
+ memset(screen, ' ', screensize); // clear new screen
}
-//----- IO Routines --------------------------------------------
-static Byte readit(void) // read (maybe cursor) key from stdin
+//----- Draw the status line at bottom of the screen -------------
+static void show_status_line(void)
{
- Byte c;
- int i, bufsiz, cnt, cmdindex;
- struct esc_cmds {
- Byte *seq;
- Byte val;
- };
+ static int last_cksum;
+ int l, cnt, cksum;
- static struct esc_cmds esccmds[] = {
- {(Byte *) "OA", (Byte) VI_K_UP}, // cursor key Up
- {(Byte *) "OB", (Byte) VI_K_DOWN}, // cursor key Down
- {(Byte *) "OC", (Byte) VI_K_RIGHT}, // Cursor Key Right
- {(Byte *) "OD", (Byte) VI_K_LEFT}, // cursor key Left
- {(Byte *) "OH", (Byte) VI_K_HOME}, // Cursor Key Home
- {(Byte *) "OF", (Byte) VI_K_END}, // Cursor Key End
- {(Byte *) "", (Byte) VI_K_UP}, // cursor key Up
- {(Byte *) "", (Byte) VI_K_DOWN}, // cursor key Down
- {(Byte *) "", (Byte) VI_K_RIGHT}, // Cursor Key Right
- {(Byte *) "", (Byte) VI_K_LEFT}, // cursor key Left
- {(Byte *) "", (Byte) VI_K_HOME}, // Cursor Key Home
- {(Byte *) "", (Byte) VI_K_END}, // Cursor Key End
- {(Byte *) "[2~", (Byte) VI_K_INSERT}, // Cursor Key Insert
- {(Byte *) "[5~", (Byte) VI_K_PAGEUP}, // Cursor Key Page Up
- {(Byte *) "[6~", (Byte) VI_K_PAGEDOWN}, // Cursor Key Page Down
- {(Byte *) "OP", (Byte) VI_K_FUN1}, // Function Key F1
- {(Byte *) "OQ", (Byte) VI_K_FUN2}, // Function Key F2
- {(Byte *) "OR", (Byte) VI_K_FUN3}, // Function Key F3
- {(Byte *) "OS", (Byte) VI_K_FUN4}, // Function Key F4
- {(Byte *) "[15~", (Byte) VI_K_FUN5}, // Function Key F5
- {(Byte *) "[17~", (Byte) VI_K_FUN6}, // Function Key F6
- {(Byte *) "[18~", (Byte) VI_K_FUN7}, // Function Key F7
- {(Byte *) "[19~", (Byte) VI_K_FUN8}, // Function Key F8
- {(Byte *) "[20~", (Byte) VI_K_FUN9}, // Function Key F9
- {(Byte *) "[21~", (Byte) VI_K_FUN10}, // Function Key F10
- {(Byte *) "[23~", (Byte) VI_K_FUN11}, // Function Key F11
- {(Byte *) "[24~", (Byte) VI_K_FUN12}, // Function Key F12
- {(Byte *) "[11~", (Byte) VI_K_FUN1}, // Function Key F1
- {(Byte *) "[12~", (Byte) VI_K_FUN2}, // Function Key F2
- {(Byte *) "[13~", (Byte) VI_K_FUN3}, // Function Key F3
- {(Byte *) "[14~", (Byte) VI_K_FUN4}, // Function Key F4
- };
-
-#define ESCCMDS_COUNT (sizeof(esccmds)/sizeof(struct esc_cmds))
-
- (void) alarm(0); // turn alarm OFF while we wait for input
- // get input from User- are there already input chars in Q?
- bufsiz = strlen((char *) readbuffer);
- if (bufsiz <= 0) {
- ri0:
- // the Q is empty, wait for a typed char
- bufsiz = read(0, readbuffer, BUFSIZ - 1);
- if (bufsiz < 0) {
- if (errno == EINTR)
- goto ri0; // interrupted sys call
- if (errno == EBADF)
- editing = 0;
- if (errno == EFAULT)
- editing = 0;
- if (errno == EINVAL)
- editing = 0;
- if (errno == EIO)
- editing = 0;
- errno = 0;
- bufsiz = 0;
- }
- readbuffer[bufsiz] = '\0';
+ cnt = strlen((char *) status_buffer);
+ for (cksum= l= 0; l < cnt; l++) { cksum += (int)(status_buffer[l]); }
+ // don't write the status line unless it changes
+ if (cnt > 0 && last_cksum != cksum) {
+ last_cksum= cksum; // remember if we have seen this line
+ place_cursor(rows - 1, 0, FALSE); // put cursor on status line
+ write(1, status_buffer, cnt);
+ clear_to_eol();
+ place_cursor(crow, ccol, FALSE); // put cursor back in correct place
}
- // return char if it is not part of ESC sequence
- if (readbuffer[0] != 27)
- goto ri1;
+}
- // This is an ESC char. Is this Esc sequence?
- // Could be bare Esc key. See if there are any
- // more chars to read after the ESC. This would
- // be a Function or Cursor Key sequence.
- FD_ZERO(&rfds);
- FD_SET(0, &rfds);
- tv.tv_sec = 0;
- tv.tv_usec = 50000; // Wait 5/100 seconds- 1 Sec=1000000
+//----- format the status buffer, the bottom line of screen ------
+// print status buffer, with STANDOUT mode
+static void psbs(char *format, ...)
+{
+ va_list args;
- // keep reading while there are input chars and room in buffer
- while (select(1, &rfds, NULL, NULL, &tv) > 0 && bufsiz <= (BUFSIZ - 5)) {
- // read the rest of the ESC string
- i = read(0, (void *) (readbuffer + bufsiz), BUFSIZ - bufsiz);
- if (i > 0) {
- bufsiz += i;
- readbuffer[bufsiz] = '\0'; // Terminate the string
- }
- }
- // Maybe cursor or function key?
- for (cmdindex = 0; cmdindex < ESCCMDS_COUNT; cmdindex++) {
- cnt = strlen((char *) esccmds[cmdindex].seq);
- i = strncmp((char *) esccmds[cmdindex].seq, (char *) readbuffer, cnt);
- if (i == 0) {
- // is a Cursor key- put derived value back into Q
- readbuffer[0] = esccmds[cmdindex].val;
- // squeeze out the ESC sequence
- for (i = 1; i < cnt; i++) {
- memmove(readbuffer + 1, readbuffer + 2, BUFSIZ - 2);
- readbuffer[BUFSIZ - 1] = '\0';
- }
- break;
- }
- }
- ri1:
- c = readbuffer[0];
- // remove one char from Q
- memmove(readbuffer, readbuffer + 1, BUFSIZ - 1);
- readbuffer[BUFSIZ - 1] = '\0';
- (void) alarm(3); // we are done waiting for input, turn alarm ON
- return (c);
+ va_start(args, format);
+ strcpy((char *) status_buffer, SOs); // Terminal standout mode on
+ vsprintf((char *) status_buffer + strlen((char *) status_buffer), format,
+ args);
+ strcat((char *) status_buffer, SOn); // Terminal standout mode off
+ va_end(args);
+
+ return;
}
-//----- IO Routines --------------------------------------------
-static Byte get_one_char()
+// print status buffer
+static void psb(char *format, ...)
{
- static Byte c;
+ va_list args;
-#ifdef CONFIG_FEATURE_VI_DOT_CMD
- // ! adding2q && ioq == 0 read()
- // ! adding2q && ioq != 0 *ioq
- // adding2q *last_modifying_cmd= read()
- if (!adding2q) {
- // we are not adding to the q.
- // but, we may be reading from a q
- if (ioq == 0) {
- // there is no current q, read from STDIN
- c = readit(); // get the users input
- } else {
- // there is a queue to get chars from first
- c = *ioq++;
- if (c == '\0') {
- // the end of the q, read from STDIN
- free(ioq_start);
- ioq_start = ioq = 0;
- c = readit(); // get the users input
- }
- }
- } else {
- // adding STDIN chars to q
- c = readit(); // get the users input
- if (last_modifying_cmd != 0) {
- // add new char to q
- last_modifying_cmd[strlen((char *) last_modifying_cmd)] = c;
- }
- }
-#else /* CONFIG_FEATURE_VI_DOT_CMD */
- c = readit(); // get the users input
-#endif /* CONFIG_FEATURE_VI_DOT_CMD */
- return (c); // return the char, where ever it came from
+ va_start(args, format);
+ vsprintf((char *) status_buffer, format, args);
+ va_end(args);
+ return;
}
-static Byte *get_input_line(Byte * prompt) // get input line- use "status line"
+static void ni(Byte * s) // display messages
{
Byte buf[BUFSIZ];
- Byte c;
- int i;
- static Byte *obufp = NULL;
-
- strcpy((char *) buf, (char *) prompt);
- *status_buffer = '\0'; // clear the status buffer
- place_cursor(rows - 1, 0, FALSE); // go to Status line, bottom of screen
- clear_to_eol(); // clear the line
- write(1, prompt, strlen((char *) prompt)); // write out the :, /, or ? prompt
- for (i = strlen((char *) buf); i < BUFSIZ;) {
- c = get_one_char(); // read user input
- if (c == '\n' || c == '\r' || c == 27)
- break; // is this end of input
- if (c == erase_char) { // user wants to erase prev char
- i--; // backup to prev char
- buf[i] = '\0'; // erase the char
- buf[i + 1] = '\0'; // null terminate buffer
- write(1, " ", 3); // erase char on screen
- if (i <= 0) { // user backs up before b-o-l, exit
- break;
- }
- } else {
- buf[i] = c; // save char in buffer
- buf[i + 1] = '\0'; // make sure buffer is null terminated
- write(1, buf + i, 1); // echo the char back to user
- i++;
- }
- }
- refresh(FALSE);
- if (obufp != NULL)
- free(obufp);
- obufp = (Byte *) xstrdup((char *) buf);
- return (obufp);
+ print_literal(buf, s);
+ psbs("\'%s\' is not implemented", buf);
}
-static int file_size(Byte * fn) // what is the byte size of "fn"
+static void edit_status(void) // show file status on status line
{
- struct stat st_buf;
- int cnt, sr;
+ int cur, tot, percent;
- if (fn == 0 || strlen(fn) <= 0)
- return (-1);
- cnt = -1;
- sr = stat((char *) fn, &st_buf); // see if file exists
- if (sr >= 0) {
- cnt = (int) st_buf.st_size;
+ cur = count_lines(text, dot);
+ tot = count_lines(text, end - 1);
+ // current line percent
+ // ------------- ~~ ----------
+ // total lines 100
+ if (tot > 0) {
+ percent = (100 * cur) / tot;
+ } else {
+ cur = tot = 0;
+ percent = 100;
}
- return (cnt);
+ psb("\"%s\""
+#ifdef CONFIG_FEATURE_VI_READONLY
+ "%s"
+#endif /* CONFIG_FEATURE_VI_READONLY */
+ "%s line %d of %d --%d%%--",
+ (cfn != 0 ? (char *) cfn : "No file"),
+#ifdef CONFIG_FEATURE_VI_READONLY
+ ((vi_readonly || readonly) ? " [Read only]" : ""),
+#endif /* CONFIG_FEATURE_VI_READONLY */
+ (file_modified ? " [modified]" : ""),
+ cur, tot, percent);
}
-static int file_insert(Byte * fn, Byte * p, int size)
+//----- Force refresh of all Lines -----------------------------
+static void redraw(int full_screen)
{
- int fd, cnt;
+ place_cursor(0, 0, FALSE); // put cursor in correct place
+ clear_to_eos(); // tel terminal to erase display
+ screen_erase(); // erase the internal screen buffer
+ refresh(full_screen); // this will redraw the entire display
+}
- cnt = -1;
-#ifdef CONFIG_FEATURE_VI_READONLY
- readonly = FALSE;
-#endif /* CONFIG_FEATURE_VI_READONLY */
- if (fn == 0 || strlen((char*) fn) <= 0) {
- psbs("No filename given");
- goto fi0;
- }
- if (size == 0) {
- // OK- this is just a no-op
- cnt = 0;
- goto fi0;
- }
- if (size < 0) {
- psbs("Trying to insert a negative number (%d) of characters", size);
- goto fi0;
- }
- if (p < text || p > end) {
- psbs("Trying to insert file outside of memory");
- goto fi0;
- }
-
- // see if we can open the file
-#ifdef CONFIG_FEATURE_VI_READONLY
- if (vi_readonly) goto fi1; // do not try write-mode
-#endif
- fd = open((char *) fn, O_RDWR); // assume read & write
- if (fd < 0) {
- // could not open for writing- maybe file is read only
-#ifdef CONFIG_FEATURE_VI_READONLY
- fi1:
-#endif
- fd = open((char *) fn, O_RDONLY); // try read-only
- if (fd < 0) {
- psbs("\"%s\" %s", fn, "could not open file");
- goto fi0;
+//----- Format a text[] line into a buffer ---------------------
+static void format_line(Byte *dest, Byte *src, int li)
+{
+ int co;
+ Byte c;
+
+ for (co= 0; co < MAX_SCR_COLS; co++) {
+ c= ' '; // assume blank
+ if (li > 0 && co == 0) {
+ c = '~'; // not first line, assume Tilde
}
-#ifdef CONFIG_FEATURE_VI_READONLY
- // got the file- read-only
- readonly = TRUE;
-#endif /* CONFIG_FEATURE_VI_READONLY */
- }
- p = text_hole_make(p, size);
- cnt = read(fd, p, size);
- close(fd);
- if (cnt < 0) {
- cnt = -1;
- p = text_hole_delete(p, p + size - 1); // un-do buffer insert
- psbs("could not read file \"%s\"", fn);
- } else if (cnt < size) {
- // There was a partial read, shrink unused space text[]
- p = text_hole_delete(p + cnt, p + (size - cnt) - 1); // un-do buffer insert
- psbs("could not read all of file \"%s\"", fn);
+ // are there chars in text[] and have we gone past the end
+ if (text < end && src < end) {
+ c = *src++;
+ }
+ if (c == '\n')
+ break;
+ if (c < ' ' || c > '~') {
+ if (c == '\t') {
+ c = ' ';
+ // co % 8 != 7
+ for (; (co % tabstop) != (tabstop - 1); co++) {
+ dest[co] = c;
+ }
+ } else {
+ dest[co++] = '^';
+ c |= '@'; // make it visible
+ c &= 0x7f; // get rid of hi bit
+ }
+ }
+ // the co++ is done here so that the column will
+ // not be overwritten when we blank-out the rest of line
+ dest[co] = c;
+ if (src >= end)
+ break;
}
- if (cnt >= size)
- file_modified = TRUE;
- fi0:
- return (cnt);
}
-static int file_write(Byte * fn, Byte * first, Byte * last)
+//----- Refresh the changed screen lines -----------------------
+// Copy the source line from text[] into the buffer and note
+// if the current screenline is different from the new buffer.
+// If they differ then that line needs redrawing on the terminal.
+//
+static void refresh(int full_screen)
{
- int fd, cnt, charcnt;
+ static int old_offset;
+ int li, changed;
+ Byte buf[MAX_SCR_COLS];
+ Byte *tp, *sp; // pointer into text[] and screen[]
+#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
+ int last_li= -2; // last line that changed- for optimizing cursor movement
+#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
- if (fn == 0) {
- psbs("No current filename");
- return (-1);
- }
- charcnt = 0;
- // FIXIT- use the correct umask()
- fd = open((char *) fn, (O_WRONLY | O_CREAT | O_TRUNC), 0664);
- if (fd < 0)
- return (-1);
- cnt = last - first + 1;
- charcnt = write(fd, first, cnt);
- if (charcnt == cnt) {
- // good write
- //file_modified= FALSE; // the file has not been modified
- } else {
- charcnt = 0;
- }
- close(fd);
- return (charcnt);
-}
+#ifdef CONFIG_FEATURE_VI_WIN_RESIZE
+ window_size_get(0);
+#endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
+ sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
+ tp = screenbegin; // index into text[] of top line
-//----- Terminal Drawing ---------------------------------------
-// The terminal is made up of 'rows' line of 'columns' columns.
-// classicly this would be 24 x 80.
-// screen coordinates
-// 0,0 ... 0,79
-// 1,0 ... 1,79
-// . ... .
-// . ... .
-// 22,0 ... 22,79
-// 23,0 ... 23,79 status line
-//
+ // compare text[] to screen[] and mark screen[] lines that need updating
+ for (li = 0; li < rows - 1; li++) {
+ int cs, ce; // column start & end
+ memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer
+ buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer
+ // format current text line into buf
+ format_line(buf, tp, li);
-//----- Move the cursor to row x col (count from 0, not 1) -------
-static void place_cursor(int row, int col, int opti)
-{
- char cm1[BUFSIZ];
- char *cm;
- int l;
+ // skip to the end of the current text[] line
+ while (tp < end && *tp++ != '\n') /*no-op*/ ;
+
+ // see if there are any changes between vitual screen and buf
+ changed = FALSE; // assume no change
+ cs= 0;
+ ce= columns-1;
+ sp = &screen[li * columns]; // start of screen line
+ if (full_screen) {
+ // force re-draw of every single column from 0 - columns-1
+ goto re0;
+ }
+ // compare newly formatted buffer with virtual screen
+ // look forward for first difference between buf and screen
+ for ( ; cs <= ce; cs++) {
+ if (buf[cs + offset] != sp[cs]) {
+ changed = TRUE; // mark for redraw
+ break;
+ }
+ }
+
+ // look backward for last difference between buf and screen
+ for ( ; ce >= cs; ce--) {
+ if (buf[ce + offset] != sp[ce]) {
+ changed = TRUE; // mark for redraw
+ break;
+ }
+ }
+ // now, cs is index of first diff, and ce is index of last diff
+
+ // if horz offset has changed, force a redraw
+ if (offset != old_offset) {
+ re0:
+ changed = TRUE;
+ }
+
+ // make a sanity check of columns indexes
+ if (cs < 0) cs= 0;
+ if (ce > columns-1) ce= columns-1;
+ if (cs > ce) { cs= 0; ce= columns-1; }
+ // is there a change between vitual screen and buf
+ if (changed) {
+ // copy changed part of buffer to virtual screen
+ memmove(sp+cs, buf+(cs+offset), ce-cs+1);
+
+ // move cursor to column of first change
+ if (offset != old_offset) {
+ // opti_cur_move is still too stupid
+ // to handle offsets correctly
+ place_cursor(li, cs, FALSE);
+ } else {
#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
- char cm2[BUFSIZ];
- Byte *screenp;
- // char cm3[BUFSIZ];
- int Rrow= last_row;
+ // if this just the next line
+ // try to optimize cursor movement
+ // otherwise, use standard ESC sequence
+ place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE);
+ last_li= li;
+#else /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
+ place_cursor(li, cs, FALSE); // use standard ESC sequence
#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
-
- memset(cm1, '\0', BUFSIZ - 1); // clear the buffer
-
- if (row < 0) row = 0;
- if (row >= rows) row = rows - 1;
- if (col < 0) col = 0;
- if (col >= columns) col = columns - 1;
-
- //----- 1. Try the standard terminal ESC sequence
- sprintf((char *) cm1, CMrc, row + 1, col + 1);
- cm= cm1;
- if (! opti) goto pc0;
+ }
+ // write line out to terminal
+ write(1, sp+cs, ce-cs+1);
#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
- //----- find the minimum # of chars to move cursor -------------
- //----- 2. Try moving with discreet chars (Newline, [back]space, ...)
- memset(cm2, '\0', BUFSIZ - 1); // clear the buffer
-
- // move to the correct row
- while (row < Rrow) {
- // the cursor has to move up
- strcat(cm2, CMup);
- Rrow--;
- }
- while (row > Rrow) {
- // the cursor has to move down
- strcat(cm2, CMdown);
- Rrow++;
+ last_row = li;
+#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
+ }
}
-
- // now move to the correct column
- strcat(cm2, "\r"); // start at col 0
- // just send out orignal source char to get to correct place
- screenp = &screen[row * columns]; // start of screen line
- strncat(cm2, screenp, col);
-
- //----- 3. Try some other way of moving cursor
- //---------------------------------------------
- // pick the shortest cursor motion to send out
- cm= cm1;
- if (strlen(cm2) < strlen(cm)) {
- cm= cm2;
- } /* else if (strlen(cm3) < strlen(cm)) {
- cm= cm3;
- } */
+#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
+ place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE);
+ last_row = crow;
+#else
+ place_cursor(crow, ccol, FALSE);
#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
- pc0:
- l= strlen(cm);
- if (l) write(1, cm, l); // move the cursor
+
+ if (offset != old_offset)
+ old_offset = offset;
}
-//----- Erase from cursor to end of line -----------------------
-static void clear_to_eol()
-{
- write(1, Ceol, strlen(Ceol)); // Erase from cursor to end of line
-}
-
-//----- Erase from cursor to end of screen -----------------------
-static void clear_to_eos()
-{
- write(1, Ceos, strlen(Ceos)); // Erase from cursor to end of screen
-}
-
-//----- Start standout mode ------------------------------------
-static void standout_start() // send "start reverse video" sequence
-{
- write(1, SOs, strlen(SOs)); // Start reverse video mode
-}
-
-//----- End standout mode --------------------------------------
-static void standout_end() // send "end reverse video" sequence
-{
- write(1, SOn, strlen(SOn)); // End reverse video mode
-}
+//---------------------------------------------------------------------
+//----- the Ascii Chart -----------------------------------------------
+//
+// 00 nul 01 soh 02 stx 03 etx 04 eot 05 enq 06 ack 07 bel
+// 08 bs 09 ht 0a nl 0b vt 0c np 0d cr 0e so 0f si
+// 10 dle 11 dc1 12 dc2 13 dc3 14 dc4 15 nak 16 syn 17 etb
+// 18 can 19 em 1a sub 1b esc 1c fs 1d gs 1e rs 1f us
+// 20 sp 21 ! 22 " 23 # 24 $ 25 % 26 & 27 '
+// 28 ( 29 ) 2a * 2b + 2c , 2d - 2e . 2f /
+// 30 0 31 1 32 2 33 3 34 4 35 5 36 6 37 7
+// 38 8 39 9 3a : 3b ; 3c < 3d = 3e > 3f ?
+// 40 @ 41 A 42 B 43 C 44 D 45 E 46 F 47 G
+// 48 H 49 I 4a J 4b K 4c L 4d M 4e N 4f O
+// 50 P 51 Q 52 R 53 S 54 T 55 U 56 V 57 W
+// 58 X 59 Y 5a Z 5b [ 5c \ 5d ] 5e ^ 5f _
+// 60 ` 61 a 62 b 63 c 64 d 65 e 66 f 67 g
+// 68 h 69 i 6a j 6b k 6c l 6d m 6e n 6f o
+// 70 p 71 q 72 r 73 s 74 t 75 u 76 v 77 w
+// 78 x 79 y 7a z 7b { 7c | 7d } 7e ~ 7f del
+//---------------------------------------------------------------------
-//----- Flash the screen --------------------------------------
-static void flash(int h)
+//----- Execute a Vi Command -----------------------------------
+static void do_cmd(Byte c)
{
- standout_start(); // send "start reverse video" sequence
- redraw(TRUE);
- (void) mysleep(h);
- standout_end(); // send "end reverse video" sequence
- redraw(TRUE);
-}
+ Byte c1, *p, *q, *msg, buf[9], *save_dot;
+ int cnt, i, j, dir, yf;
-static void beep()
-{
- write(1, bell, strlen(bell)); // send out a bell character
-}
+ c1 = c; // quiet the compiler
+ cnt = yf = dir = 0; // quiet the compiler
+ p = q = save_dot = msg = buf; // quiet the compiler
+ memset(buf, '\0', 9); // clear buf
-static void indicate_error(char c)
-{
-#ifdef CONFIG_FEATURE_VI_CRASHME
- if (crashme > 0)
- return; // generate a random command
-#endif /* CONFIG_FEATURE_VI_CRASHME */
- if (err_method == 0) {
- beep();
- } else {
- flash(10);
+ /* if this is a cursor key, skip these checks */
+ switch (c) {
+ case VI_K_UP:
+ case VI_K_DOWN:
+ case VI_K_LEFT:
+ case VI_K_RIGHT:
+ case VI_K_HOME:
+ case VI_K_END:
+ case VI_K_PAGEUP:
+ case VI_K_PAGEDOWN:
+ goto key_cmd_mode;
}
-}
-
-//----- Screen[] Routines --------------------------------------
-//----- Erase the Screen[] memory ------------------------------
-static void screen_erase()
-{
- memset(screen, ' ', screensize); // clear new screen
-}
-
-//----- Draw the status line at bottom of the screen -------------
-static void show_status_line(void)
-{
- static int last_cksum;
- int l, cnt, cksum;
- cnt = strlen((char *) status_buffer);
- for (cksum= l= 0; l < cnt; l++) { cksum += (int)(status_buffer[l]); }
- // don't write the status line unless it changes
- if (cnt > 0 && last_cksum != cksum) {
- last_cksum= cksum; // remember if we have seen this line
- place_cursor(rows - 1, 0, FALSE); // put cursor on status line
- write(1, status_buffer, cnt);
- clear_to_eol();
- place_cursor(crow, ccol, FALSE); // put cursor back in correct place
+ if (cmd_mode == 2) {
+ // we are 'R'eplacing the current *dot with new char
+ if (*dot == '\n') {
+ // don't Replace past E-o-l
+ cmd_mode = 1; // convert to insert
+ } else {
+ if (1 <= c && c <= 127) { // only ASCII chars
+ if (c != 27)
+ dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
+ dot = char_insert(dot, c); // insert new char
+ }
+ goto dc1;
+ }
}
-}
-
-//----- format the status buffer, the bottom line of screen ------
-// print status buffer, with STANDOUT mode
-static void psbs(char *format, ...)
-{
- va_list args;
-
- va_start(args, format);
- strcpy((char *) status_buffer, SOs); // Terminal standout mode on
- vsprintf((char *) status_buffer + strlen((char *) status_buffer), format,
- args);
- strcat((char *) status_buffer, SOn); // Terminal standout mode off
- va_end(args);
-
- return;
-}
-
-// print status buffer
-static void psb(char *format, ...)
-{
- va_list args;
-
- va_start(args, format);
- vsprintf((char *) status_buffer, format, args);
- va_end(args);
- return;
-}
-
-static void ni(Byte * s) // display messages
-{
- Byte buf[BUFSIZ];
-
- print_literal(buf, s);
- psbs("\'%s\' is not implemented", buf);
-}
-
-static void edit_status(void) // show file status on status line
-{
- int cur, tot, percent;
-
- cur = count_lines(text, dot);
- tot = count_lines(text, end - 1);
- // current line percent
- // ------------- ~~ ----------
- // total lines 100
- if (tot > 0) {
- percent = (100 * cur) / tot;
- } else {
- cur = tot = 0;
- percent = 100;
+ if (cmd_mode == 1) {
+ // hitting "Insert" twice means "R" replace mode
+ if (c == VI_K_INSERT) goto dc5;
+ // insert the char c at "dot"
+ if (1 <= c && c <= 127) {
+ dot = char_insert(dot, c); // only ASCII chars
+ }
+ goto dc1;
}
- psb("\"%s\""
-#ifdef CONFIG_FEATURE_VI_READONLY
- "%s"
-#endif /* CONFIG_FEATURE_VI_READONLY */
- "%s line %d of %d --%d%%--",
- (cfn != 0 ? (char *) cfn : "No file"),
+
+key_cmd_mode:
+ switch (c) {
+ //case 0x01: // soh
+ //case 0x09: // ht
+ //case 0x0b: // vt
+ //case 0x0e: // so
+ //case 0x0f: // si
+ //case 0x10: // dle
+ //case 0x11: // dc1
+ //case 0x13: // dc3
+#ifdef CONFIG_FEATURE_VI_CRASHME
+ case 0x14: // dc4 ctrl-T
+ crashme = (crashme == 0) ? 1 : 0;
+ break;
+#endif /* CONFIG_FEATURE_VI_CRASHME */
+ //case 0x16: // syn
+ //case 0x17: // etb
+ //case 0x18: // can
+ //case 0x1c: // fs
+ //case 0x1d: // gs
+ //case 0x1e: // rs
+ //case 0x1f: // us
+ //case '!': // !-
+ //case '#': // #-
+ //case '&': // &-
+ //case '(': // (-
+ //case ')': // )-
+ //case '*': // *-
+ //case ',': // ,-
+ //case '=': // =-
+ //case '@': // @-
+ //case 'F': // F-
+ //case 'K': // K-
+ //case 'Q': // Q-
+ //case 'S': // S-
+ //case 'T': // T-
+ //case 'V': // V-
+ //case '[': // [-
+ //case '\\': // \-
+ //case ']': // ]-
+ //case '_': // _-
+ //case '`': // `-
+ //case 'g': // g-
+ //case 'u': // u- FIXME- there is no undo
+ //case 'v': // v-
+ default: // unrecognised command
+ buf[0] = c;
+ buf[1] = '\0';
+ if (c <= ' ') {
+ buf[0] = '^';
+ buf[1] = c + '@';
+ buf[2] = '\0';
+ }
+ ni((Byte *) buf);
+ end_cmd_q(); // stop adding to q
+ case 0x00: // nul- ignore
+ break;
+ case 2: // ctrl-B scroll up full screen
+ case VI_K_PAGEUP: // Cursor Key Page Up
+ dot_scroll(rows - 2, -1);
+ break;
+#ifdef CONFIG_FEATURE_VI_USE_SIGNALS
+ case 0x03: // ctrl-C interrupt
+ longjmp(restart, 1);
+ break;
+ case 26: // ctrl-Z suspend
+ suspend_sig(SIGTSTP);
+ break;
+#endif /* CONFIG_FEATURE_VI_USE_SIGNALS */
+ case 4: // ctrl-D scroll down half screen
+ dot_scroll((rows - 2) / 2, 1);
+ break;
+ case 5: // ctrl-E scroll down one line
+ dot_scroll(1, 1);
+ break;
+ case 6: // ctrl-F scroll down full screen
+ case VI_K_PAGEDOWN: // Cursor Key Page Down
+ dot_scroll(rows - 2, 1);
+ break;
+ case 7: // ctrl-G show current status
+ edit_status();
+ break;
+ case 'h': // h- move left
+ case VI_K_LEFT: // cursor key Left
+ case 8: // ctrl-H- move left (This may be ERASE char)
+ case 127: // DEL- move left (This may be ERASE char)
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dot_left();
+ break;
+ case 10: // Newline ^J
+ case 'j': // j- goto next line, same col
+ case VI_K_DOWN: // cursor key Down
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dot_next(); // go to next B-o-l
+ dot = move_to_col(dot, ccol + offset); // try stay in same col
+ break;
+ case 12: // ctrl-L force redraw whole screen
+ case 18: // ctrl-R force redraw
+ place_cursor(0, 0, FALSE); // put cursor in correct place
+ clear_to_eos(); // tel terminal to erase display
+ (void) mysleep(10);
+ screen_erase(); // erase the internal screen buffer
+ refresh(TRUE); // this will redraw the entire display
+ break;
+ case 13: // Carriage Return ^M
+ case '+': // +- goto next line
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dot_next();
+ dot_skip_over_ws();
+ break;
+ case 21: // ctrl-U scroll up half screen
+ dot_scroll((rows - 2) / 2, -1);
+ break;
+ case 25: // ctrl-Y scroll up one line
+ dot_scroll(1, -1);
+ break;
+ case 27: // esc
+ if (cmd_mode == 0)
+ indicate_error(c);
+ cmd_mode = 0; // stop insrting
+ end_cmd_q();
+ *status_buffer = '\0'; // clear status buffer
+ break;
+ case ' ': // move right
+ case 'l': // move right
+ case VI_K_RIGHT: // Cursor Key Right
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dot_right();
+ break;
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ case '"': // "- name a register to use for Delete/Yank
+ c1 = get_one_char();
+ c1 = tolower(c1);
+ if (islower(c1)) {
+ YDreg = c1 - 'a';
+ } else {
+ indicate_error(c);
+ }
+ break;
+ case '\'': // '- goto a specific mark
+ c1 = get_one_char();
+ c1 = tolower(c1);
+ if (islower(c1)) {
+ c1 = c1 - 'a';
+ // get the b-o-l
+ q = mark[(int) c1];
+ if (text <= q && q < end) {
+ dot = q;
+ dot_begin(); // go to B-o-l
+ dot_skip_over_ws();
+ }
+ } else if (c1 == '\'') { // goto previous context
+ dot = swap_context(dot); // swap current and previous context
+ dot_begin(); // go to B-o-l
+ dot_skip_over_ws();
+ } else {
+ indicate_error(c);
+ }
+ break;
+ case 'm': // m- Mark a line
+ // this is really stupid. If there are any inserts or deletes
+ // between text[0] and dot then this mark will not point to the
+ // correct location! It could be off by many lines!
+ // Well..., at least its quick and dirty.
+ c1 = get_one_char();
+ c1 = tolower(c1);
+ if (islower(c1)) {
+ c1 = c1 - 'a';
+ // remember the line
+ mark[(int) c1] = dot;
+ } else {
+ indicate_error(c);
+ }
+ break;
+ case 'P': // P- Put register before
+ case 'p': // p- put register after
+ p = reg[YDreg];
+ if (p == 0) {
+ psbs("Nothing in register %c", what_reg());
+ break;
+ }
+ // are we putting whole lines or strings
+ if (strchr((char *) p, '\n') != NULL) {
+ if (c == 'P') {
+ dot_begin(); // putting lines- Put above
+ }
+ if (c == 'p') {
+ // are we putting after very last line?
+ if (end_line(dot) == (end - 1)) {
+ dot = end; // force dot to end of text[]
+ } else {
+ dot_next(); // next line, then put before
+ }
+ }
+ } else {
+ if (c == 'p')
+ dot_right(); // move to right, can move to NL
+ }
+ dot = string_insert(dot, p); // insert the string
+ end_cmd_q(); // stop adding to q
+ break;
+ case 'U': // U- Undo; replace current line with original version
+ if (reg[Ureg] != 0) {
+ p = begin_line(dot);
+ q = end_line(dot);
+ p = text_hole_delete(p, q); // delete cur line
+ p = string_insert(p, reg[Ureg]); // insert orig line
+ dot = p;
+ dot_skip_over_ws();
+ }
+ break;
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+ case '$': // $- goto end of line
+ case VI_K_END: // Cursor Key End
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dot = end_line(dot + 1);
+ break;
+ case '%': // %- find matching char of pair () [] {}
+ for (q = dot; q < end && *q != '\n'; q++) {
+ if (strchr("()[]{}", *q) != NULL) {
+ // we found half of a pair
+ p = find_pair(q, *q);
+ if (p == NULL) {
+ indicate_error(c);
+ } else {
+ dot = p;
+ }
+ break;
+ }
+ }
+ if (*q == '\n')
+ indicate_error(c);
+ break;
+ case 'f': // f- forward to a user specified char
+ last_forward_char = get_one_char(); // get the search char
+ //
+ // dont seperate these two commands. 'f' depends on ';'
+ //
+ //**** fall thru to ... 'i'
+ case ';': // ;- look at rest of line for last forward char
+ if (cmdcnt-- > 1) {
+ do_cmd(';');
+ } // repeat cnt
+ if (last_forward_char == 0) break;
+ q = dot + 1;
+ while (q < end - 1 && *q != '\n' && *q != last_forward_char) {
+ q++;
+ }
+ if (*q == last_forward_char)
+ dot = q;
+ break;
+ case '-': // -- goto prev line
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dot_prev();
+ dot_skip_over_ws();
+ break;
+#ifdef CONFIG_FEATURE_VI_DOT_CMD
+ case '.': // .- repeat the last modifying command
+ // Stuff the last_modifying_cmd back into stdin
+ // and let it be re-executed.
+ if (last_modifying_cmd != 0) {
+ ioq = ioq_start = (Byte *) xstrdup((char *) last_modifying_cmd);
+ }
+ break;
+#endif /* CONFIG_FEATURE_VI_DOT_CMD */
+#ifdef CONFIG_FEATURE_VI_SEARCH
+ case '?': // /- search for a pattern
+ case '/': // /- search for a pattern
+ buf[0] = c;
+ buf[1] = '\0';
+ q = get_input_line(buf); // get input line- use "status line"
+ if (strlen((char *) q) == 1)
+ goto dc3; // if no pat re-use old pat
+ if (strlen((char *) q) > 1) { // new pat- save it and find
+ // there is a new pat
+ if (last_search_pattern != 0) {
+ free(last_search_pattern);
+ }
+ last_search_pattern = (Byte *) xstrdup((char *) q);
+ goto dc3; // now find the pattern
+ }
+ // user changed mind and erased the "/"- do nothing
+ break;
+ case 'N': // N- backward search for last pattern
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dir = BACK; // assume BACKWARD search
+ p = dot - 1;
+ if (last_search_pattern[0] == '?') {
+ dir = FORWARD;
+ p = dot + 1;
+ }
+ goto dc4; // now search for pattern
+ break;
+ case 'n': // n- repeat search for last pattern
+ // search rest of text[] starting at next char
+ // if search fails return orignal "p" not the "p+1" address
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dc3:
+ if (last_search_pattern == 0) {
+ msg = (Byte *) "No previous regular expression";
+ goto dc2;
+ }
+ if (last_search_pattern[0] == '/') {
+ dir = FORWARD; // assume FORWARD search
+ p = dot + 1;
+ }
+ if (last_search_pattern[0] == '?') {
+ dir = BACK;
+ p = dot - 1;
+ }
+ dc4:
+ q = char_search(p, last_search_pattern + 1, dir, FULL);
+ if (q != NULL) {
+ dot = q; // good search, update "dot"
+ msg = (Byte *) "";
+ goto dc2;
+ }
+ // no pattern found between "dot" and "end"- continue at top
+ p = text;
+ if (dir == BACK) {
+ p = end - 1;
+ }
+ q = char_search(p, last_search_pattern + 1, dir, FULL);
+ if (q != NULL) { // found something
+ dot = q; // found new pattern- goto it
+ msg = (Byte *) "search hit BOTTOM, continuing at TOP";
+ if (dir == BACK) {
+ msg = (Byte *) "search hit TOP, continuing at BOTTOM";
+ }
+ } else {
+ msg = (Byte *) "Pattern not found";
+ }
+ dc2:
+ psbs("%s", msg);
+ break;
+ case '{': // {- move backward paragraph
+ q = char_search(dot, (Byte *) "\n\n", BACK, FULL);
+ if (q != NULL) { // found blank line
+ dot = next_line(q); // move to next blank line
+ }
+ break;
+ case '}': // }- move forward paragraph
+ q = char_search(dot, (Byte *) "\n\n", FORWARD, FULL);
+ if (q != NULL) { // found blank line
+ dot = next_line(q); // move to next blank line
+ }
+ break;
+#endif /* CONFIG_FEATURE_VI_SEARCH */
+ case '0': // 0- goto begining of line
+ case '1': // 1-
+ case '2': // 2-
+ case '3': // 3-
+ case '4': // 4-
+ case '5': // 5-
+ case '6': // 6-
+ case '7': // 7-
+ case '8': // 8-
+ case '9': // 9-
+ if (c == '0' && cmdcnt < 1) {
+ dot_begin(); // this was a standalone zero
+ } else {
+ cmdcnt = cmdcnt * 10 + (c - '0'); // this 0 is part of a number
+ }
+ break;
+ case ':': // :- the colon mode commands
+ p = get_input_line((Byte *) ":"); // get input line- use "status line"
+#ifdef CONFIG_FEATURE_VI_COLON
+ colon(p); // execute the command
+#else /* CONFIG_FEATURE_VI_COLON */
+ if (*p == ':')
+ p++; // move past the ':'
+ cnt = strlen((char *) p);
+ if (cnt <= 0)
+ break;
+ if (strncasecmp((char *) p, "quit", cnt) == 0 ||
+ strncasecmp((char *) p, "q!", cnt) == 0) { // delete lines
+ if (file_modified && p[1] != '!') {
+ psbs("No write since last change (:quit! overrides)");
+ } else {
+ editing = 0;
+ }
+ } else if (strncasecmp((char *) p, "write", cnt) == 0 ||
+ strncasecmp((char *) p, "wq", cnt) == 0 ||
+ strncasecmp((char *) p, "x", cnt) == 0) {
+ cnt = file_write(cfn, text, end - 1);
+ file_modified = FALSE;
+ psb("\"%s\" %dL, %dC", cfn, count_lines(text, end - 1), cnt);
+ if (p[0] == 'x' || p[1] == 'q') {
+ editing = 0;
+ }
+ } else if (strncasecmp((char *) p, "file", cnt) == 0 ) {
+ edit_status(); // show current file status
+ } else if (sscanf((char *) p, "%d", &j) > 0) {
+ dot = find_line(j); // go to line # j
+ dot_skip_over_ws();
+ } else { // unrecognised cmd
+ ni((Byte *) p);
+ }
+#endif /* CONFIG_FEATURE_VI_COLON */
+ break;
+ case '<': // <- Left shift something
+ case '>': // >- Right shift something
+ cnt = count_lines(text, dot); // remember what line we are on
+ c1 = get_one_char(); // get the type of thing to delete
+ find_range(&p, &q, c1);
+ (void) yank_delete(p, q, 1, YANKONLY); // save copy before change
+ p = begin_line(p);
+ q = end_line(q);
+ i = count_lines(p, q); // # of lines we are shifting
+ for ( ; i > 0; i--, p = next_line(p)) {
+ if (c == '<') {
+ // shift left- remove tab or 8 spaces
+ if (*p == '\t') {
+ // shrink buffer 1 char
+ (void) text_hole_delete(p, p);
+ } else if (*p == ' ') {
+ // we should be calculating columns, not just SPACE
+ for (j = 0; *p == ' ' && j < tabstop; j++) {
+ (void) text_hole_delete(p, p);
+ }
+ }
+ } else if (c == '>') {
+ // shift right -- add tab or 8 spaces
+ (void) char_insert(p, '\t');
+ }
+ }
+ dot = find_line(cnt); // what line were we on
+ dot_skip_over_ws();
+ end_cmd_q(); // stop adding to q
+ break;
+ case 'A': // A- append at e-o-l
+ dot_end(); // go to e-o-l
+ //**** fall thru to ... 'a'
+ case 'a': // a- append after current char
+ if (*dot != '\n')
+ dot++;
+ goto dc_i;
+ break;
+ case 'B': // B- back a blank-delimited Word
+ case 'E': // E- end of a blank-delimited word
+ case 'W': // W- forward a blank-delimited word
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dir = FORWARD;
+ if (c == 'B')
+ dir = BACK;
+ if (c == 'W' || isspace(dot[dir])) {
+ dot = skip_thing(dot, 1, dir, S_TO_WS);
+ dot = skip_thing(dot, 2, dir, S_OVER_WS);
+ }
+ if (c != 'W')
+ dot = skip_thing(dot, 1, dir, S_BEFORE_WS);
+ break;
+ case 'C': // C- Change to e-o-l
+ case 'D': // D- delete to e-o-l
+ save_dot = dot;
+ dot = dollar_line(dot); // move to before NL
+ // copy text into a register and delete
+ dot = yank_delete(save_dot, dot, 0, YANKDEL); // delete to e-o-l
+ if (c == 'C')
+ goto dc_i; // start inserting
+#ifdef CONFIG_FEATURE_VI_DOT_CMD
+ if (c == 'D')
+ end_cmd_q(); // stop adding to q
+#endif /* CONFIG_FEATURE_VI_DOT_CMD */
+ break;
+ case 'G': // G- goto to a line number (default= E-O-F)
+ dot = end - 1; // assume E-O-F
+ if (cmdcnt > 0) {
+ dot = find_line(cmdcnt); // what line is #cmdcnt
+ }
+ dot_skip_over_ws();
+ break;
+ case 'H': // H- goto top line on screen
+ dot = screenbegin;
+ if (cmdcnt > (rows - 1)) {
+ cmdcnt = (rows - 1);
+ }
+ if (cmdcnt-- > 1) {
+ do_cmd('+');
+ } // repeat cnt
+ dot_skip_over_ws();
+ break;
+ case 'I': // I- insert before first non-blank
+ dot_begin(); // 0
+ dot_skip_over_ws();
+ //**** fall thru to ... 'i'
+ case 'i': // i- insert before current char
+ case VI_K_INSERT: // Cursor Key Insert
+ dc_i:
+ cmd_mode = 1; // start insrting
+ psb("-- Insert --");
+ break;
+ case 'J': // J- join current and next lines together
+ if (cmdcnt-- > 2) {
+ do_cmd(c);
+ } // repeat cnt
+ dot_end(); // move to NL
+ if (dot < end - 1) { // make sure not last char in text[]
+ *dot++ = ' '; // replace NL with space
+ while (isblnk(*dot)) { // delete leading WS
+ dot_delete();
+ }
+ }
+ end_cmd_q(); // stop adding to q
+ break;
+ case 'L': // L- goto bottom line on screen
+ dot = end_screen();
+ if (cmdcnt > (rows - 1)) {
+ cmdcnt = (rows - 1);
+ }
+ if (cmdcnt-- > 1) {
+ do_cmd('-');
+ } // repeat cnt
+ dot_begin();
+ dot_skip_over_ws();
+ break;
+ case 'M': // M- goto middle line on screen
+ dot = screenbegin;
+ for (cnt = 0; cnt < (rows-1) / 2; cnt++)
+ dot = next_line(dot);
+ break;
+ case 'O': // O- open a empty line above
+ // 0i\n ESC -i
+ p = begin_line(dot);
+ if (p[-1] == '\n') {
+ dot_prev();
+ case 'o': // o- open a empty line below; Yes, I know it is in the middle of the "if (..."
+ dot_end();
+ dot = char_insert(dot, '\n');
+ } else {
+ dot_begin(); // 0
+ dot = char_insert(dot, '\n'); // i\n ESC
+ dot_prev(); // -
+ }
+ goto dc_i;
+ break;
+ case 'R': // R- continuous Replace char
+ dc5:
+ cmd_mode = 2;
+ psb("-- Replace --");
+ break;
+ case 'X': // X- delete char before dot
+ case 'x': // x- delete the current char
+ case 's': // s- substitute the current char
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dir = 0;
+ if (c == 'X')
+ dir = -1;
+ if (dot[dir] != '\n') {
+ if (c == 'X')
+ dot--; // delete prev char
+ dot = yank_delete(dot, dot, 0, YANKDEL); // delete char
+ }
+ if (c == 's')
+ goto dc_i; // start insrting
+ end_cmd_q(); // stop adding to q
+ break;
+ case 'Z': // Z- if modified, {write}; exit
+ // ZZ means to save file (if necessary), then exit
+ c1 = get_one_char();
+ if (c1 != 'Z') {
+ indicate_error(c);
+ break;
+ }
+ if (file_modified
#ifdef CONFIG_FEATURE_VI_READONLY
- ((vi_readonly || readonly) ? " [Read only]" : ""),
+ && ! vi_readonly
+ && ! readonly
#endif /* CONFIG_FEATURE_VI_READONLY */
- (file_modified ? " [modified]" : ""),
- cur, tot, percent);
-}
-
-//----- Force refresh of all Lines -----------------------------
-static void redraw(int full_screen)
-{
- place_cursor(0, 0, FALSE); // put cursor in correct place
- clear_to_eos(); // tel terminal to erase display
- screen_erase(); // erase the internal screen buffer
- refresh(full_screen); // this will redraw the entire display
-}
-
-//----- Format a text[] line into a buffer ---------------------
-static void format_line(Byte *dest, Byte *src, int li)
-{
- int co;
- Byte c;
-
- for (co= 0; co < MAX_SCR_COLS; co++) {
- c= ' '; // assume blank
- if (li > 0 && co == 0) {
- c = '~'; // not first line, assume Tilde
- }
- // are there chars in text[] and have we gone past the end
- if (text < end && src < end) {
- c = *src++;
+ ) {
+ cnt = file_write(cfn, text, end - 1);
+ if (cnt == (end - 1 - text + 1)) {
+ editing = 0;
+ }
+ } else {
+ editing = 0;
}
- if (c == '\n')
+ break;
+ case '^': // ^- move to first non-blank on line
+ dot_begin();
+ dot_skip_over_ws();
+ break;
+ case 'b': // b- back a word
+ case 'e': // e- end of word
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dir = FORWARD;
+ if (c == 'b')
+ dir = BACK;
+ if ((dot + dir) < text || (dot + dir) > end - 1)
break;
- if (c < ' ' || c > '~') {
- if (c == '\t') {
- c = ' ';
- // co % 8 != 7
- for (; (co % tabstop) != (tabstop - 1); co++) {
- dest[co] = c;
+ dot += dir;
+ if (isspace(*dot)) {
+ dot = skip_thing(dot, (c == 'e') ? 2 : 1, dir, S_OVER_WS);
+ }
+ if (isalnum(*dot) || *dot == '_') {
+ dot = skip_thing(dot, 1, dir, S_END_ALNUM);
+ } else if (ispunct(*dot)) {
+ dot = skip_thing(dot, 1, dir, S_END_PUNCT);
+ }
+ break;
+ case 'c': // c- change something
+ case 'd': // d- delete something
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ case 'y': // y- yank something
+ case 'Y': // Y- Yank a line
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+ yf = YANKDEL; // assume either "c" or "d"
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ if (c == 'y' || c == 'Y')
+ yf = YANKONLY;
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+ c1 = 'y';
+ if (c != 'Y')
+ c1 = get_one_char(); // get the type of thing to delete
+ find_range(&p, &q, c1);
+ if (c1 == 27) { // ESC- user changed mind and wants out
+ c = c1 = 27; // Escape- do nothing
+ } else if (strchr("wW", c1)) {
+ if (c == 'c') {
+ // don't include trailing WS as part of word
+ while (isblnk(*q)) {
+ if (q <= text || q[-1] == '\n')
+ break;
+ q--;
+ }
+ }
+ dot = yank_delete(p, q, 0, yf); // delete word
+ } else if (strchr("^0bBeEft$", c1)) {
+ // single line copy text into a register and delete
+ dot = yank_delete(p, q, 0, yf); // delete word
+ } else if (strchr("cdykjHL%+-{}\r\n", c1)) {
+ // multiple line copy text into a register and delete
+ dot = yank_delete(p, q, 1, yf); // delete lines
+ if (c == 'c') {
+ dot = char_insert(dot, '\n');
+ // on the last line of file don't move to prev line
+ if (dot != (end-1)) {
+ dot_prev();
}
- } else {
- dest[co++] = '^';
- c |= '@'; // make it visible
- c &= 0x7f; // get rid of hi bit
+ } else if (c == 'd') {
+ dot_begin();
+ dot_skip_over_ws();
}
+ } else {
+ // could not recognize object
+ c = c1 = 27; // error-
+ indicate_error(c);
}
- // the co++ is done here so that the column will
- // not be overwritten when we blank-out the rest of line
- dest[co] = c;
- if (src >= end)
- break;
- }
-}
-
-//----- Refresh the changed screen lines -----------------------
-// Copy the source line from text[] into the buffer and note
-// if the current screenline is different from the new buffer.
-// If they differ then that line needs redrawing on the terminal.
-//
-static void refresh(int full_screen)
-{
- static int old_offset;
- int li, changed;
- Byte buf[MAX_SCR_COLS];
- Byte *tp, *sp; // pointer into text[] and screen[]
-#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
- int last_li= -2; // last line that changed- for optimizing cursor movement
-#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
-
-#ifdef CONFIG_FEATURE_VI_WIN_RESIZE
- window_size_get(0);
-#endif /* CONFIG_FEATURE_VI_WIN_RESIZE */
- sync_cursor(dot, &crow, &ccol); // where cursor will be (on "dot")
- tp = screenbegin; // index into text[] of top line
-
- // compare text[] to screen[] and mark screen[] lines that need updating
- for (li = 0; li < rows - 1; li++) {
- int cs, ce; // column start & end
- memset(buf, ' ', MAX_SCR_COLS); // blank-out the buffer
- buf[MAX_SCR_COLS-1] = 0; // NULL terminate the buffer
- // format current text line into buf
- format_line(buf, tp, li);
-
- // skip to the end of the current text[] line
- while (tp < end && *tp++ != '\n') /*no-op*/ ;
-
- // see if there are any changes between vitual screen and buf
- changed = FALSE; // assume no change
- cs= 0;
- ce= columns-1;
- sp = &screen[li * columns]; // start of screen line
- if (full_screen) {
- // force re-draw of every single column from 0 - columns-1
- goto re0;
- }
- // compare newly formatted buffer with virtual screen
- // look forward for first difference between buf and screen
- for ( ; cs <= ce; cs++) {
- if (buf[cs + offset] != sp[cs]) {
- changed = TRUE; // mark for redraw
- break;
+ if (c1 != 27) {
+ // if CHANGING, not deleting, start inserting after the delete
+ if (c == 'c') {
+ strcpy((char *) buf, "Change");
+ goto dc_i; // start inserting
}
- }
-
- // look backward for last difference between buf and screen
- for ( ; ce >= cs; ce--) {
- if (buf[ce + offset] != sp[ce]) {
- changed = TRUE; // mark for redraw
- break;
+ if (c == 'd') {
+ strcpy((char *) buf, "Delete");
+ }
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ if (c == 'y' || c == 'Y') {
+ strcpy((char *) buf, "Yank");
+ }
+ p = reg[YDreg];
+ q = p + strlen((char *) p);
+ for (cnt = 0; p <= q; p++) {
+ if (*p == '\n')
+ cnt++;
}
+ psb("%s %d lines (%d chars) using [%c]",
+ buf, cnt, strlen((char *) reg[YDreg]), what_reg());
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+ end_cmd_q(); // stop adding to q
}
- // now, cs is index of first diff, and ce is index of last diff
-
- // if horz offset has changed, force a redraw
- if (offset != old_offset) {
- re0:
- changed = TRUE;
+ break;
+ case 'k': // k- goto prev line, same col
+ case VI_K_UP: // cursor key Up
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ dot_prev();
+ dot = move_to_col(dot, ccol + offset); // try stay in same col
+ break;
+ case 'r': // r- replace the current char with user input
+ c1 = get_one_char(); // get the replacement char
+ if (*dot != '\n') {
+ *dot = c1;
+ file_modified = TRUE; // has the file been modified
}
-
- // make a sanity check of columns indexes
- if (cs < 0) cs= 0;
- if (ce > columns-1) ce= columns-1;
- if (cs > ce) { cs= 0; ce= columns-1; }
- // is there a change between vitual screen and buf
- if (changed) {
- // copy changed part of buffer to virtual screen
- memmove(sp+cs, buf+(cs+offset), ce-cs+1);
-
- // move cursor to column of first change
- if (offset != old_offset) {
- // opti_cur_move is still too stupid
- // to handle offsets correctly
- place_cursor(li, cs, FALSE);
- } else {
-#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
- // if this just the next line
- // try to optimize cursor movement
- // otherwise, use standard ESC sequence
- place_cursor(li, cs, li == (last_li+1) ? TRUE : FALSE);
- last_li= li;
-#else /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
- place_cursor(li, cs, FALSE); // use standard ESC sequence
-#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
- }
-
- // write line out to terminal
- write(1, sp+cs, ce-cs+1);
-#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
- last_row = li;
-#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
+ end_cmd_q(); // stop adding to q
+ break;
+ case 't': // t- move to char prior to next x
+ last_forward_char = get_one_char();
+ do_cmd(';');
+ if (*dot == last_forward_char)
+ dot_left();
+ last_forward_char= 0;
+ break;
+ case 'w': // w- forward a word
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ if (isalnum(*dot) || *dot == '_') { // we are on ALNUM
+ dot = skip_thing(dot, 1, FORWARD, S_END_ALNUM);
+ } else if (ispunct(*dot)) { // we are on PUNCT
+ dot = skip_thing(dot, 1, FORWARD, S_END_PUNCT);
+ }
+ if (dot < end - 1)
+ dot++; // move over word
+ if (isspace(*dot)) {
+ dot = skip_thing(dot, 2, FORWARD, S_OVER_WS);
+ }
+ break;
+ case 'z': // z-
+ c1 = get_one_char(); // get the replacement char
+ cnt = 0;
+ if (c1 == '.')
+ cnt = (rows - 2) / 2; // put dot at center
+ if (c1 == '-')
+ cnt = rows - 2; // put dot at bottom
+ screenbegin = begin_line(dot); // start dot at top
+ dot_scroll(cnt, -1);
+ break;
+ case '|': // |- move to column "cmdcnt"
+ dot = move_to_col(dot, cmdcnt - 1); // try to move to column
+ break;
+ case '~': // ~- flip the case of letters a-z -> A-Z
+ if (cmdcnt-- > 1) {
+ do_cmd(c);
+ } // repeat cnt
+ if (islower(*dot)) {
+ *dot = toupper(*dot);
+ file_modified = TRUE; // has the file been modified
+ } else if (isupper(*dot)) {
+ *dot = tolower(*dot);
+ file_modified = TRUE; // has the file been modified
}
+ dot_right();
+ end_cmd_q(); // stop adding to q
+ break;
+ //----- The Cursor and Function Keys -----------------------------
+ case VI_K_HOME: // Cursor Key Home
+ dot_begin();
+ break;
+ // The Fn keys could point to do_macro which could translate them
+ case VI_K_FUN1: // Function Key F1
+ case VI_K_FUN2: // Function Key F2
+ case VI_K_FUN3: // Function Key F3
+ case VI_K_FUN4: // Function Key F4
+ case VI_K_FUN5: // Function Key F5
+ case VI_K_FUN6: // Function Key F6
+ case VI_K_FUN7: // Function Key F7
+ case VI_K_FUN8: // Function Key F8
+ case VI_K_FUN9: // Function Key F9
+ case VI_K_FUN10: // Function Key F10
+ case VI_K_FUN11: // Function Key F11
+ case VI_K_FUN12: // Function Key F12
+ break;
}
-#ifdef CONFIG_FEATURE_VI_OPTIMIZE_CURSOR
- place_cursor(crow, ccol, (crow == last_row) ? TRUE : FALSE);
- last_row = crow;
-#else
- place_cursor(crow, ccol, FALSE);
-#endif /* CONFIG_FEATURE_VI_OPTIMIZE_CURSOR */
-
- if (offset != old_offset)
- old_offset = offset;
+ dc1:
+ // if text[] just became empty, add back an empty line
+ if (end == text) {
+ (void) char_insert(text, '\n'); // start empty buf with dummy line
+ dot = text;
+ }
+ // it is OK for dot to exactly equal to end, otherwise check dot validity
+ if (dot != end) {
+ dot = bound_dot(dot); // make sure "dot" is valid
+ }
+#ifdef CONFIG_FEATURE_VI_YANKMARK
+ check_context(c); // update the current context
+#endif /* CONFIG_FEATURE_VI_YANKMARK */
+
+ if (!isdigit(c))
+ cmdcnt = 0; // cmd was not a number, reset cmdcnt
+ cnt = dot - begin_line(dot);
+ // Try to stay off of the Newline
+ if (*dot == '\n' && cnt > 0 && cmd_mode == 0)
+ dot--;
}