Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
1 parent
4791bbb
commit a17b0f4
Showing
4 changed files
with
269 additions
and
2 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
|
@@ -7,6 +7,7 @@ gst_playd_SOURCES= \ | |
pubsub.c \ | ||
operations.c \ | ||
utility.c \ | ||
uuencode.c \ | ||
gst_playd.1 \ | ||
aclocal.m4 | ||
|
||
|
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,236 @@ | ||
/* vi: set sw=4 ts=4: */ | ||
/* | ||
* Copyright 2003, Glenn McGrath | ||
* Copyright 2006, Rob Landley <rob@landley.net> | ||
* Copyright 2010, Denys Vlasenko | ||
* Copyright 2012, Paul Betts | ||
* | ||
* Licensed under GPLv2 or later, see file LICENSE in this source tree. | ||
*/ | ||
|
||
#include <stdio.h> | ||
#include <sys/types.h> | ||
#include <sys/uio.h> | ||
#include <string.h> | ||
#include <glib.h> | ||
|
||
#include "uuencode.h" | ||
|
||
/* Conversion table. for base 64 */ | ||
const char uuenc_tbl_base64[65 + 1] = { | ||
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', | ||
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', | ||
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', | ||
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', | ||
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', | ||
'o', 'p', 'q', 'r', 's', 't', 'u', 'v', | ||
'w', 'x', 'y', 'z', '0', '1', '2', '3', | ||
'4', '5', '6', '7', '8', '9', '+', '/', | ||
'=' /* termination character */, | ||
'\0' /* needed for uudecode.c only */ | ||
}; | ||
|
||
const char uuenc_tbl_std[65] = { | ||
'`', '!', '"', '#', '$', '%', '&', '\'', | ||
'(', ')', '*', '+', ',', '-', '.', '/', | ||
'0', '1', '2', '3', '4', '5', '6', '7', | ||
'8', '9', ':', ';', '<', '=', '>', '?', | ||
'@', 'A', 'B', 'C', 'D', 'E', 'F', 'G', | ||
'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', | ||
'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', | ||
'X', 'Y', 'Z', '[', '\\', ']', '^', '_', | ||
'`' /* termination character */ | ||
}; | ||
|
||
int uuencode_get_length(int source_size) | ||
{ | ||
return (4 * ((source_size + 2) / 3)); | ||
} | ||
|
||
/* | ||
* Encode bytes at S of length LENGTH to uuencode or base64 format and place it | ||
* to STORE. STORE will be 0-terminated, and must point to a writable | ||
* buffer of at least 1+BASE64_LENGTH(length) bytes. | ||
* where BASE64_LENGTH(len) = (4 * ((LENGTH + 2) / 3)) | ||
*/ | ||
void uuencode(char *p, const void *src, int length, const char *tbl) | ||
{ | ||
const unsigned char *s = src; | ||
|
||
/* Transform the 3x8 bits to 4x6 bits */ | ||
while (length > 0) { | ||
unsigned s1, s2; | ||
|
||
/* Are s[1], s[2] valid or should be assumed 0? */ | ||
s1 = s2 = 0; | ||
length -= 3; /* can be >=0, -1, -2 */ | ||
if (length >= -1) { | ||
s1 = s[1]; | ||
if (length >= 0) | ||
s2 = s[2]; | ||
} | ||
*p++ = tbl[s[0] >> 2]; | ||
*p++ = tbl[((s[0] & 3) << 4) + (s1 >> 4)]; | ||
*p++ = tbl[((s1 & 0xf) << 2) + (s2 >> 6)]; | ||
*p++ = tbl[s2 & 0x3f]; | ||
s += 3; | ||
} | ||
/* Zero-terminate */ | ||
*p = '\0'; | ||
/* If length is -2 or -1, pad last char or two */ | ||
while (length) { | ||
*--p = tbl[64]; | ||
length++; | ||
} | ||
} | ||
|
||
/* | ||
* Decode base64 encoded string. Stops on '\0'. | ||
* | ||
* Returns: pointer to the undecoded part of source. | ||
* If points to '\0', then the source was fully decoded. | ||
* (*pp_dst): advanced past the last written byte. | ||
*/ | ||
const char* decode_base64(char **pp_dst, const char *src) | ||
{ | ||
char *dst = *pp_dst; | ||
const char *src_tail; | ||
|
||
while (1) { | ||
unsigned char six_bit[4]; | ||
int count = 0; | ||
|
||
/* Fetch up to four 6-bit values */ | ||
src_tail = src; | ||
while (count < 4) { | ||
char *table_ptr; | ||
int ch; | ||
|
||
/* Get next _valid_ character. | ||
* uuenc_tbl_base64[] contains this string: | ||
* 0 1 2 3 4 5 6 | ||
* 01234567890123456789012345678901234567890123456789012345678901234 | ||
* "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=" | ||
*/ | ||
do { | ||
ch = *src; | ||
if (ch == '\0') { | ||
if (count == 0) { | ||
/* Example: | ||
* If we decode "QUJD <NUL>", we want | ||
* to return ptr to NUL, not to ' ', | ||
* because we did fully decode | ||
* the string (to "ABC"). | ||
*/ | ||
src_tail = src; | ||
} | ||
goto ret; | ||
} | ||
src++; | ||
table_ptr = strchr(uuenc_tbl_base64, ch); | ||
//TODO: add BASE64_FLAG_foo to die on bad char? | ||
} while (!table_ptr); | ||
|
||
/* Convert encoded character to decimal */ | ||
ch = table_ptr - uuenc_tbl_base64; | ||
|
||
/* ch is 64 if char was '=', otherwise 0..63 */ | ||
if (ch == 64) | ||
break; | ||
six_bit[count] = ch; | ||
count++; | ||
} | ||
|
||
/* Transform 6-bit values to 8-bit ones. | ||
* count can be < 4 when we decode the tail: | ||
* "eQ==" -> "y", not "y NUL NUL". | ||
* Note that (count > 1) is always true, | ||
* "x===" encoding is not valid: | ||
* even a single zero byte encodes as "AA==". | ||
* However, with current logic we come here with count == 1 | ||
* when we decode "==" tail. | ||
*/ | ||
if (count > 1) | ||
*dst++ = six_bit[0] << 2 | six_bit[1] >> 4; | ||
if (count > 2) | ||
*dst++ = six_bit[1] << 4 | six_bit[2] >> 2; | ||
if (count > 3) | ||
*dst++ = six_bit[2] << 6 | six_bit[3]; | ||
/* Note that if we decode "AA==" and ate first '=', | ||
* we just decoded one char (count == 2) and now we'll | ||
* do the loop once more to decode second '='. | ||
*/ | ||
} /* while (1) */ | ||
ret: | ||
*pp_dst = dst; | ||
return src_tail; | ||
} | ||
|
||
/* | ||
* Decode base64 encoded stream. | ||
* Can stop on EOF, specified char, or on uuencode-style "====" line: | ||
* flags argument controls it. | ||
*/ | ||
int 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) | ||
|
||
/* uuencoded files have 61 byte lines. Use 64 byte buffer | ||
* to process line at a time. | ||
*/ | ||
enum { BUFFER_SIZE = 64 }; | ||
|
||
char in_buf[BUFFER_SIZE + 2]; | ||
char out_buf[BUFFER_SIZE / 4 * 3 + 2]; | ||
char *out_tail; | ||
const char *in_tail; | ||
int term_seen = 0; | ||
int in_count = 0; | ||
|
||
while (1) { | ||
while (in_count < BUFFER_SIZE) { | ||
int ch = fgetc(src_stream); | ||
if (ch == exit_char) { | ||
if (in_count == 0) | ||
return 1; | ||
term_seen = 1; | ||
break; | ||
} | ||
if (ch == EOF) { | ||
term_seen = 1; | ||
break; | ||
} | ||
/* Prevent "====" line to be split: stop if we see '\n'. | ||
* We can also skip other whitespace and skirt the problem | ||
* of files with NULs by stopping on any control char or space: | ||
*/ | ||
if (ch <= ' ') | ||
break; | ||
in_buf[in_count++] = ch; | ||
} | ||
in_buf[in_count] = '\0'; | ||
|
||
/* Did we encounter "====" line? */ | ||
if (uu_style_end && strcmp(in_buf, "====") == 0) | ||
return 1; | ||
|
||
out_tail = out_buf; | ||
in_tail = decode_base64(&out_tail, in_buf); | ||
|
||
fwrite(out_buf, (out_tail - out_buf), 1, dst_stream); | ||
|
||
if (term_seen) { | ||
/* Did we consume ALL characters? */ | ||
if (*in_tail == '\0') | ||
return 1; | ||
/* No */ | ||
return 0; | ||
} | ||
|
||
/* It was partial decode */ | ||
in_count = strlen(in_tail); | ||
memmove(in_buf, in_tail, in_count); | ||
} | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,27 @@ | ||
/* vi: set sw=4 ts=4: */ | ||
/* | ||
* Copyright 2003, Glenn McGrath | ||
* Copyright 2006, Rob Landley <rob@landley.net> | ||
* Copyright 2010, Denys Vlasenko | ||
* | ||
* Licensed under GPLv2 or later, see file LICENSE in this source tree. | ||
*/ | ||
|
||
#ifndef __UUENCODE_H | ||
#define __UUENCODE_H | ||
|
||
enum { | ||
BASE64_FLAG_UU_STOP = 0x100, | ||
/* Sign-extends to a value which never_uses_backup_flager matches fgetc result: */ | ||
BASE64_FLAG_NO_STOP_CHAR = 0x80, | ||
}; | ||
|
||
const char uuenc_tbl_base64[65 + 1]; | ||
const char uuenc_tbl_std[65]; | ||
|
||
void uuencode(char *p, const void *src, int length, const char *tbl); | ||
int uuencode_get_length(int source_size); | ||
const char* decode_base64(char **pp_dst, const char *src); | ||
int read_base64(FILE *src_stream, FILE *dst_stream, int flags); | ||
|
||
#endif |