53f5c0d5b
Eric Andersen
2004-07-26
Subject
Allow hex escape sequences
Binary
No binary (build failed)
Architecture & Compiler Flags
—
Build Log
(log yok)
Commit Diff GitHub →
libbb/process_escape_sequence.c+16 -23
| @@ -22,42 +22,35 @@ | |
| * | |
| */ | |
| - | #include <string.h> |
| #include <stdio.h> | |
| #include <limits.h> | |
| - | #include <ctype.h> |
| #include "libbb.h" | |
| - | #define isodigit(c) ((c) >= '0' && (c) <= '7') |
| - | #define hextobin(c) ((c)>='a'&&(c)<='f' ? (c)-'a'+10 : (c)>='A'&&(c)<='F' ? (c)-'A'+10 : (c)-'0') |
| - | #define octtobin(c) ((c) - '0') |
| char bb_process_escape_sequence(const char **ptr) | |
| { | |
| - | const char *p, *q; |
| - | unsigned int num_digits, r, n, hexescape; |
| static const char charmap[] = { | |
| 'a', 'b', 'f', 'n', 'r', 't', 'v', '\\', 0, | |
| '\a', '\b', '\f', '\n', '\r', '\t', '\v', '\\', '\\' }; | |
| - | n = r = hexescape = num_digits = 0; |
| - | q = *ptr; |
| + | const char *p; |
| + | const char *q; |
| + | unsigned int num_digits; |
| + | unsigned int r; |
| + | unsigned int n; |
| - | if (*q == 'x') { |
| - | hexescape++; |
| - | ++q; |
| - | } |
| + | n = 0; |
| + | q = *ptr; |
| + | num_digits = 0; |
| do { | |
| - | if (hexescape && isxdigit(*q)) { |
| - | r = n * 16 + hextobin(*q); |
| - | } else if (isodigit(*q)) { |
| - | r = n * 8 + octtobin(*q); |
| - | } |
| - | if (r <= UCHAR_MAX) { |
| - | n = r; |
| - | ++q; |
| - | if (++num_digits < 3) { |
| - | continue; |
| + | if (((unsigned int)(*q - '0')) <= 7) { |
| + | r = n * 8 + (*q - '0'); |
| + | if (r <= UCHAR_MAX) { |
| + | n = r; |
| + | ++q; |
| + | if (++num_digits < 3) { |
| + | continue; |
| + | } |
| } | |
| } | |
| break; | |