move read_base64 to libbb/uuencode.c
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—
(log yok)
| @@ -1,78 +0,0 @@ | |
| - | /* vi: set sw=4 ts=4: */ |
| - | /* |
| - | * Utility routines. |
| - | * |
| - | * Copyright 2003, Glenn McGrath |
| - | * Copyright 2010, Denys Vlasenko |
| - | * |
| - | * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| - | */ |
| - | #include "libbb.h" |
| - | |
| - | //kbuild:lib-y += base64.o |
| - | |
| - | void FAST_FUNC read_base64(FILE *src_stream, FILE *dst_stream, int flags) |
| - | { |
| - | /* Note that EOF _can_ be passed as exit_char too */ |
| - | #define exit_char ((int)(signed char)flags) |
| - | #define uu_style_end (flags & BASE64_FLAG_UUEND) |
| - | |
| - | int term_count = 0; |
| - | |
| - | while (1) { |
| - | unsigned char translated[4]; |
| - | int count = 0; |
| - | |
| - | /* Process one group of 4 chars */ |
| - | while (count < 4) { |
| - | char *table_ptr; |
| - | int ch; |
| - | |
| - | /* Get next _valid_ character. |
| - | * bb_uuenc_tbl_base64[] contains this string: |
| - | * 0 1 2 3 4 5 6 |
| - | * 012345678901234567890123456789012345678901234567890123456789012345 |
| - | * "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n" |
| - | */ |
| - | do { |
| - | ch = fgetc(src_stream); |
| - | if (ch == exit_char && count == 0) |
| - | return; |
| - | if (ch == EOF) |
| - | bb_error_msg_and_die("truncated base64 input"); |
| - | table_ptr = strchr(bb_uuenc_tbl_base64, ch); |
| - | //TODO: add BASE64_FLAG_foo to die on bad char? |
| - | //Note that then we may need to still allow '\r' (for mail processing) |
| - | } while (!table_ptr); |
| - | |
| - | /* Convert encoded character to decimal */ |
| - | ch = table_ptr - bb_uuenc_tbl_base64; |
| - | |
| - | if (ch == 65 /* '\n' */) { |
| - | /* Terminating "====" line? */ |
| - | if (uu_style_end && term_count == 4) |
| - | return; /* yes */ |
| - | continue; |
| - | } |
| - | /* ch is 64 if char was '=', otherwise 0..63 */ |
| - | translated[count] = ch & 63; /* 64 -> 0 */ |
| - | if (ch == 64) { |
| - | term_count++; |
| - | break; |
| - | } |
| - | term_count = 0; |
| - | count++; |
| - | } |
| - | |
| - | /* Merge 6 bit chars to 8 bit. |
| - | * count can be < 4 when we decode the tail: |
| - | * "eQ==" -> "y", not "y NUL NUL" |
| - | */ |
| - | if (count > 1) |
| - | fputc(translated[0] << 2 | translated[1] >> 4, dst_stream); |
| - | if (count > 2) |
| - | fputc(translated[1] << 4 | translated[2] >> 2, dst_stream); |
| - | if (count > 3) |
| - | fputc(translated[2] << 6 | translated[3], dst_stream); |
| - | } /* while (1) */ |
| - | } |
| @@ -1,6 +1,8 @@ | |
| /* vi: set sw=4 ts=4: */ | |
| /* | |
| - | * Copyright 2006 Rob Landley <[email protected]> |
| + | * Copyright 2003, Glenn McGrath |
| + | * Copyright 2006, Rob Landley <[email protected]> |
| + | * Copyright 2010, Denys Vlasenko |
| * | |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. | |
| */ | |
| @@ -69,3 +71,75 @@ void FAST_FUNC bb_uuencode(char *p, const void *src, int length, const char *tbl | |
| length++; | |
| } | |
| } | |
| + | |
| + | /* |
| + | * Decode base64 encoded stream. |
| + | * Can stop on EOF, specified char, or on uuencode-style "====" line: |
| + | * flags argument controls it. |
| + | */ |
| + | void FAST_FUNC read_base64(FILE *src_stream, FILE *dst_stream, int flags) |
| + | { |
| + | /* Note that EOF _can_ be passed as exit_char too */ |
| + | #define exit_char ((int)(signed char)flags) |
| + | #define uu_style_end (flags & BASE64_FLAG_UU_STOP) |
| + | |
| + | int term_count = 0; |
| + | |
| + | while (1) { |
| + | unsigned char translated[4]; |
| + | int count = 0; |
| + | |
| + | /* Process one group of 4 chars */ |
| + | while (count < 4) { |
| + | char *table_ptr; |
| + | int ch; |
| + | |
| + | /* Get next _valid_ character. |
| + | * bb_uuenc_tbl_base64[] contains this string: |
| + | * 0 1 2 3 4 5 6 |
| + | * 012345678901234567890123456789012345678901234567890123456789012345 |
| + | * "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n" |
| + | */ |
| + | do { |
| + | ch = fgetc(src_stream); |
| + | if (ch == exit_char && count == 0) |
| + | return; |
| + | if (ch == EOF) |
| + | bb_error_msg_and_die("truncated base64 input"); |
| + | table_ptr = strchr(bb_uuenc_tbl_base64, ch); |
| + | //TODO: add BASE64_FLAG_foo to die on bad char? |
| + | //Note that then we may need to still allow '\r' (for mail processing) |
| + | } while (!table_ptr); |
| + | |
| + | /* Convert encoded character to decimal */ |
| + | ch = table_ptr - bb_uuenc_tbl_base64; |
| + | |
| + | if (ch == 65 /* '\n' */) { |
| + | /* Terminating "====" line? */ |
| + | if (uu_style_end && term_count == 4) |
| + | return; /* yes */ |
| + | term_count = 0; |
| + | continue; |
| + | } |
| + | /* ch is 64 if char was '=', otherwise 0..63 */ |
| + | translated[count] = ch & 63; /* 64 -> 0 */ |
| + | if (ch == 64) { |
| + | term_count++; |
| + | break; |
| + | } |
| + | count++; |
| + | term_count = 0; |
| + | } |
| + | |
| + | /* Merge 6 bit chars to 8 bit. |
| + | * count can be < 4 when we decode the tail: |
| + | * "eQ==" -> "y", not "y NUL NUL" |
| + | */ |
| + | if (count > 1) |
| + | fputc(translated[0] << 2 | translated[1] >> 4, dst_stream); |
| + | if (count > 2) |
| + | fputc(translated[1] << 4 | translated[2] >> 2, dst_stream); |
| + | if (count > 3) |
| + | fputc(translated[2] << 6 | translated[3], dst_stream); |
| + | } /* while (1) */ |
| + | } |
| @@ -116,16 +116,15 @@ void FAST_FUNC encode_base64(char *fname, const char *text, const char *eol) | |
| SRC_BUF_SIZE = 45, /* This *MUST* be a multiple of 3 */ | |
| DST_BUF_SIZE = 4 * ((SRC_BUF_SIZE + 2) / 3), | |
| }; | |
| - | |
| #define src_buf text | |
| + | char src[SRC_BUF_SIZE]; |
| FILE *fp = fp; | |
| ssize_t len = len; | |
| char dst_buf[DST_BUF_SIZE + 1]; | |
| if (fname) { | |
| fp = (NOT_LONE_DASH(fname)) ? xfopen_for_read(fname) : (FILE *)text; | |
| - | src_buf = bb_common_bufsiz1; |
| - | // N.B. strlen(NULL) segfaults! |
| + | src_buf = src; |
| } else if (text) { | |
| // though we do not call uuencode(NULL, NULL) explicitly | |
| // still we do not want to break things suddenly | |