1/* 2 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard 3 * Copyright (c) 2007 Mans Rullgard 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include <stdarg.h> 23#include <stdio.h> 24#include <string.h> 25#include <ctype.h> 26#include "avstring.h" 27 28int av_strstart(const char *str, const char *pfx, const char **ptr) 29{ 30 while (*pfx && *pfx == *str) { 31 pfx++; 32 str++; 33 } 34 if (!*pfx && ptr) 35 *ptr = str; 36 return !*pfx; 37} 38 39int av_stristart(const char *str, const char *pfx, const char **ptr) 40{ 41 while (*pfx && toupper((unsigned)*pfx) == toupper((unsigned)*str)) { 42 pfx++; 43 str++; 44 } 45 if (!*pfx && ptr) 46 *ptr = str; 47 return !*pfx; 48} 49 50size_t av_strlcpy(char *dst, const char *src, size_t size) 51{ 52 size_t len = 0; 53 while (++len < size && *src) 54 *dst++ = *src++; 55 if (len <= size) 56 *dst = 0; 57 return len + strlen(src) - 1; 58} 59 60size_t av_strlcat(char *dst, const char *src, size_t size) 61{ 62 size_t len = strlen(dst); 63 if (size <= len + 1) 64 return len + strlen(src); 65 return len + av_strlcpy(dst + len, src, size - len); 66} 67 68size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) 69{ 70 int len = strlen(dst); 71 va_list vl; 72 73 va_start(vl, fmt); 74 len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl); 75 va_end(vl); 76 77 return len; 78} 79