0,0 → 1,180 |
/* |
* Copyright (c) 2012 Stefano Sabatini |
* |
* This file is part of FFmpeg. |
* |
* FFmpeg is free software; you can redistribute it and/or |
* modify it under the terms of the GNU Lesser General Public |
* License as published by the Free Software Foundation; either |
* version 2.1 of the License, or (at your option) any later version. |
* |
* FFmpeg is distributed in the hope that it will be useful, |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
* Lesser General Public License for more details. |
* |
* You should have received a copy of the GNU Lesser General Public |
* License along with FFmpeg; if not, write to the Free Software |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
*/ |
|
#include "config.h" |
#if HAVE_UNISTD_H |
#include <unistd.h> /* getopt */ |
#endif |
|
#include "libavutil/log.h" |
#include "libavutil/bprint.h" |
|
#if !HAVE_GETOPT |
#include "compat/getopt.c" |
#endif |
|
/** |
* @file |
* escaping utility |
*/ |
|
static void usage(void) |
{ |
printf("Escape an input string, adopting the av_get_token() escaping logic\n"); |
printf("usage: ffescape [OPTIONS]\n"); |
printf("\n" |
"Options:\n" |
"-e echo each input line on output\n" |
"-f flag select an escape flag, can assume the values 'whitespace' and 'strict'\n" |
"-h print this help\n" |
"-i INFILE set INFILE as input file, stdin if omitted\n" |
"-l LEVEL set the number of escaping levels, 1 if omitted\n" |
"-m ESCAPE_MODE select escape mode between 'auto', 'backslash', 'quote'\n" |
"-o OUTFILE set OUTFILE as output file, stdout if omitted\n" |
"-p PROMPT set output prompt, is '=> ' by default\n" |
"-s SPECIAL_CHARS set the list of special characters\n"); |
} |
|
int main(int argc, char **argv) |
{ |
AVBPrint src; |
char *src_buf, *dst_buf; |
const char *outfilename = NULL, *infilename = NULL; |
FILE *outfile = NULL, *infile = NULL; |
const char *prompt = "=> "; |
enum AVEscapeMode escape_mode = AV_ESCAPE_MODE_AUTO; |
int escape_flags = 0; |
int level = 1; |
int echo = 0; |
char *special_chars = NULL; |
int c; |
|
while ((c = getopt(argc, argv, "ef:hi:l:o:m:p:s:")) != -1) { |
switch (c) { |
case 'e': |
echo = 1; |
break; |
case 'h': |
usage(); |
return 0; |
case 'i': |
infilename = optarg; |
break; |
case 'f': |
if (!strcmp(optarg, "whitespace")) escape_flags |= AV_ESCAPE_FLAG_WHITESPACE; |
else if (!strcmp(optarg, "strict")) escape_flags |= AV_ESCAPE_FLAG_STRICT; |
else { |
av_log(NULL, AV_LOG_ERROR, |
"Invalid value '%s' for option -f, " |
"valid arguments are 'whitespace', and 'strict'\n", optarg); |
return 1; |
} |
break; |
case 'l': |
{ |
char *tail; |
long int li = strtol(optarg, &tail, 10); |
if (*tail || li > INT_MAX || li < 0) { |
av_log(NULL, AV_LOG_ERROR, |
"Invalid value '%s' for option -l, argument must be a non negative integer\n", |
optarg); |
return 1; |
} |
level = li; |
break; |
} |
case 'm': |
if (!strcmp(optarg, "auto")) escape_mode = AV_ESCAPE_MODE_AUTO; |
else if (!strcmp(optarg, "backslash")) escape_mode = AV_ESCAPE_MODE_BACKSLASH; |
else if (!strcmp(optarg, "quote")) escape_mode = AV_ESCAPE_MODE_QUOTE; |
else { |
av_log(NULL, AV_LOG_ERROR, |
"Invalid value '%s' for option -m, " |
"valid arguments are 'backslash', and 'quote'\n", optarg); |
return 1; |
} |
break; |
case 'o': |
outfilename = optarg; |
break; |
case 'p': |
prompt = optarg; |
break; |
case 's': |
special_chars = optarg; |
break; |
case '?': |
return 1; |
} |
} |
|
if (!infilename || !strcmp(infilename, "-")) { |
infilename = "stdin"; |
infile = stdin; |
} else { |
infile = fopen(infilename, "r"); |
} |
if (!infile) { |
av_log(NULL, AV_LOG_ERROR, "Impossible to open input file '%s': %s\n", infilename, strerror(errno)); |
return 1; |
} |
|
if (!outfilename || !strcmp(outfilename, "-")) { |
outfilename = "stdout"; |
outfile = stdout; |
} else { |
outfile = fopen(outfilename, "w"); |
} |
if (!outfile) { |
av_log(NULL, AV_LOG_ERROR, "Impossible to open output file '%s': %s\n", outfilename, strerror(errno)); |
return 1; |
} |
|
/* grab the input and store it in src */ |
av_bprint_init(&src, 1, AV_BPRINT_SIZE_UNLIMITED); |
while ((c = fgetc(infile)) != EOF) |
av_bprint_chars(&src, c, 1); |
av_bprint_chars(&src, 0, 1); |
|
if (!av_bprint_is_complete(&src)) { |
av_log(NULL, AV_LOG_ERROR, "Could not allocate a buffer for the source string\n"); |
av_bprint_finalize(&src, NULL); |
return 1; |
} |
av_bprint_finalize(&src, &src_buf); |
|
if (echo) |
fprintf(outfile, "%s", src_buf); |
|
/* escape */ |
dst_buf = src_buf; |
while (level--) { |
if (av_escape(&dst_buf, src_buf, special_chars, escape_mode, escape_flags) < 0) { |
av_log(NULL, AV_LOG_ERROR, "Could not escape string\n"); |
return 1; |
} |
av_free(src_buf); |
src_buf = dst_buf; |
} |
|
fprintf(outfile, "%s%s", prompt, dst_buf); |
av_free(dst_buf); |
return 0; |
} |