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#include "mem.h" 28 29int av_strstart(const char *str, const char *pfx, const char **ptr) 30{ 31 while (*pfx && *pfx == *str) { 32 pfx++; 33 str++; 34 } 35 if (!*pfx && ptr) 36 *ptr = str; 37 return !*pfx; 38} 39 40int av_stristart(const char *str, const char *pfx, const char **ptr) 41{ 42 while (*pfx && toupper((unsigned)*pfx) == toupper((unsigned)*str)) { 43 pfx++; 44 str++; 45 } 46 if (!*pfx && ptr) 47 *ptr = str; 48 return !*pfx; 49} 50 51char *av_stristr(const char *s1, const char *s2) 52{ 53 if (!*s2) 54 return s1; 55 56 do { 57 if (av_stristart(s1, s2, NULL)) 58 return s1; 59 } while (*s1++); 60 61 return NULL; 62} 63 64size_t av_strlcpy(char *dst, const char *src, size_t size) 65{ 66 size_t len = 0; 67 while (++len < size && *src) 68 *dst++ = *src++; 69 if (len <= size) 70 *dst = 0; 71 return len + strlen(src) - 1; 72} 73 74size_t av_strlcat(char *dst, const char *src, size_t size) 75{ 76 size_t len = strlen(dst); 77 if (size <= len + 1) 78 return len + strlen(src); 79 return len + av_strlcpy(dst + len, src, size - len); 80} 81 82size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) 83{ 84 int len = strlen(dst); 85 va_list vl; 86 87 va_start(vl, fmt); 88 len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl); 89 va_end(vl); 90 91 return len; 92} 93 94char *av_d2str(double d) 95{ 96 char *str= av_malloc(16); 97 if(str) snprintf(str, 16, "%f", d); 98 return str; 99} 100