mirror of
https://github.com/nyanmisaka/ffmpeg-rockchip.git
synced 2025-10-31 20:42:49 +08:00
111 lines
2.8 KiB
C
111 lines
2.8 KiB
C
/*
|
|
* Various simple utilities for ffmpeg system
|
|
* Copyright (c) 2000, 2001, 2002 Fabrice Bellard
|
|
*
|
|
* This library 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 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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 this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include "avformat.h"
|
|
#include <ctype.h>
|
|
|
|
#if !defined(CONFIG_NOCUTILS)
|
|
/**
|
|
* Return TRUE if val is a prefix of str. If it returns TRUE, ptr is
|
|
* set to the next character in 'str' after the prefix.
|
|
*
|
|
* @param str input string
|
|
* @param val prefix to test
|
|
* @param ptr updated after the prefix in str in there is a match
|
|
* @return TRUE if there is a match
|
|
*/
|
|
int strstart(const char *str, const char *val, const char **ptr)
|
|
{
|
|
const char *p, *q;
|
|
p = str;
|
|
q = val;
|
|
while (*q != '\0') {
|
|
if (*p != *q)
|
|
return 0;
|
|
p++;
|
|
q++;
|
|
}
|
|
if (ptr)
|
|
*ptr = p;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Return TRUE if val is a prefix of str (case independent). If it
|
|
* returns TRUE, ptr is set to the next character in 'str' after the
|
|
* prefix.
|
|
*
|
|
* @param str input string
|
|
* @param val prefix to test
|
|
* @param ptr updated after the prefix in str in there is a match
|
|
* @return TRUE if there is a match */
|
|
int stristart(const char *str, const char *val, const char **ptr)
|
|
{
|
|
const char *p, *q;
|
|
p = str;
|
|
q = val;
|
|
while (*q != '\0') {
|
|
if (toupper(*(unsigned char *)p) != toupper(*(unsigned char *)q))
|
|
return 0;
|
|
p++;
|
|
q++;
|
|
}
|
|
if (ptr)
|
|
*ptr = p;
|
|
return 1;
|
|
}
|
|
|
|
/**
|
|
* Copy the string str to buf. If str length is bigger than buf_size -
|
|
* 1 then it is clamped to buf_size - 1.
|
|
* NOTE: this function does what strncpy should have done to be
|
|
* useful. NEVER use strncpy.
|
|
*
|
|
* @param buf destination buffer
|
|
* @param buf_size size of destination buffer
|
|
* @param str source string
|
|
*/
|
|
void pstrcpy(char *buf, int buf_size, const char *str)
|
|
{
|
|
int c;
|
|
char *q = buf;
|
|
|
|
if (buf_size <= 0)
|
|
return;
|
|
|
|
for(;;) {
|
|
c = *str++;
|
|
if (c == 0 || q >= buf + buf_size - 1)
|
|
break;
|
|
*q++ = c;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
|
|
/* strcat and truncate. */
|
|
char *pstrcat(char *buf, int buf_size, const char *s)
|
|
{
|
|
int len;
|
|
len = strlen(buf);
|
|
if (len < buf_size)
|
|
pstrcpy(buf + len, buf_size - len, s);
|
|
return buf;
|
|
}
|
|
|
|
#endif
|