mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-08-21 08:45:06 +02:00
188 lines
4.2 KiB
C
188 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
|
|
* Copyright (c) 2007 Mans Rullgard
|
|
*
|
|
* This file is part of Libav.
|
|
*
|
|
* Libav 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.
|
|
*
|
|
* Libav 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 Libav; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include "avstring.h"
|
|
#include "mem.h"
|
|
|
|
int av_strstart(const char *str, const char *pfx, const char **ptr)
|
|
{
|
|
while (*pfx && *pfx == *str) {
|
|
pfx++;
|
|
str++;
|
|
}
|
|
if (!*pfx && ptr)
|
|
*ptr = str;
|
|
return !*pfx;
|
|
}
|
|
|
|
int av_stristart(const char *str, const char *pfx, const char **ptr)
|
|
{
|
|
while (*pfx && toupper((unsigned)*pfx) == toupper((unsigned)*str)) {
|
|
pfx++;
|
|
str++;
|
|
}
|
|
if (!*pfx && ptr)
|
|
*ptr = str;
|
|
return !*pfx;
|
|
}
|
|
|
|
char *av_stristr(const char *s1, const char *s2)
|
|
{
|
|
if (!*s2)
|
|
return s1;
|
|
|
|
do {
|
|
if (av_stristart(s1, s2, NULL))
|
|
return s1;
|
|
} while (*s1++);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
size_t av_strlcpy(char *dst, const char *src, size_t size)
|
|
{
|
|
size_t len = 0;
|
|
while (++len < size && *src)
|
|
*dst++ = *src++;
|
|
if (len <= size)
|
|
*dst = 0;
|
|
return len + strlen(src) - 1;
|
|
}
|
|
|
|
size_t av_strlcat(char *dst, const char *src, size_t size)
|
|
{
|
|
size_t len = strlen(dst);
|
|
if (size <= len + 1)
|
|
return len + strlen(src);
|
|
return len + av_strlcpy(dst + len, src, size - len);
|
|
}
|
|
|
|
size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
|
|
{
|
|
int len = strlen(dst);
|
|
va_list vl;
|
|
|
|
va_start(vl, fmt);
|
|
len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
|
|
va_end(vl);
|
|
|
|
return len;
|
|
}
|
|
|
|
char *av_d2str(double d)
|
|
{
|
|
char *str= av_malloc(16);
|
|
if(str) snprintf(str, 16, "%f", d);
|
|
return str;
|
|
}
|
|
|
|
#define WHITESPACES " \n\t"
|
|
|
|
char *av_get_token(const char **buf, const char *term)
|
|
{
|
|
char *out = av_malloc(strlen(*buf) + 1);
|
|
char *ret= out, *end= out;
|
|
const char *p = *buf;
|
|
if (!out) return NULL;
|
|
p += strspn(p, WHITESPACES);
|
|
|
|
while(*p && !strspn(p, term)) {
|
|
char c = *p++;
|
|
if(c == '\\' && *p){
|
|
*out++ = *p++;
|
|
end= out;
|
|
}else if(c == '\''){
|
|
while(*p && *p != '\'')
|
|
*out++ = *p++;
|
|
if(*p){
|
|
p++;
|
|
end= out;
|
|
}
|
|
}else{
|
|
*out++ = c;
|
|
}
|
|
}
|
|
|
|
do{
|
|
*out-- = 0;
|
|
}while(out >= end && strspn(out, WHITESPACES));
|
|
|
|
*buf = p;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef TEST
|
|
|
|
#undef printf
|
|
|
|
int main(void)
|
|
{
|
|
int i;
|
|
|
|
printf("Testing av_get_token()\n");
|
|
{
|
|
const char *strings[] = {
|
|
"''",
|
|
"",
|
|
":",
|
|
"\\",
|
|
"'",
|
|
" '' :",
|
|
" '' '' :",
|
|
"foo '' :",
|
|
"'foo'",
|
|
"foo ",
|
|
" ' foo ' ",
|
|
"foo\\",
|
|
"foo': blah:blah",
|
|
"foo\\: blah:blah",
|
|
"foo\'",
|
|
"'foo : ' :blahblah",
|
|
"\\ :blah",
|
|
" foo",
|
|
" foo ",
|
|
" foo \\ ",
|
|
"foo ':blah",
|
|
" foo bar : blahblah",
|
|
"\\f\\o\\o",
|
|
"'foo : \\ \\ ' : blahblah",
|
|
"'\\fo\\o:': blahblah",
|
|
"\\'fo\\o\\:': foo ' :blahblah"
|
|
};
|
|
|
|
for (i=0; i < FF_ARRAY_ELEMS(strings); i++) {
|
|
const char *p= strings[i];
|
|
printf("|%s|", p);
|
|
printf(" -> |%s|", av_get_token(&p, ":"));
|
|
printf(" + |%s|\n", p);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
#endif /* TEST */
|