/* * 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