Libav
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00001 /* 00002 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard 00003 * Copyright (c) 2007 Mans Rullgard 00004 * 00005 * This file is part of FFmpeg. 00006 * 00007 * FFmpeg is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Lesser General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2.1 of the License, or (at your option) any later version. 00011 * 00012 * FFmpeg is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Lesser General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Lesser General Public 00018 * License along with FFmpeg; if not, write to the Free Software 00019 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 00020 */ 00021 00022 #include <stdarg.h> 00023 #include <stdio.h> 00024 #include <string.h> 00025 #include <ctype.h> 00026 #include "avstring.h" 00027 #include "mem.h" 00028 00029 int av_strstart(const char *str, const char *pfx, const char **ptr) 00030 { 00031 while (*pfx && *pfx == *str) { 00032 pfx++; 00033 str++; 00034 } 00035 if (!*pfx && ptr) 00036 *ptr = str; 00037 return !*pfx; 00038 } 00039 00040 int av_stristart(const char *str, const char *pfx, const char **ptr) 00041 { 00042 while (*pfx && toupper((unsigned)*pfx) == toupper((unsigned)*str)) { 00043 pfx++; 00044 str++; 00045 } 00046 if (!*pfx && ptr) 00047 *ptr = str; 00048 return !*pfx; 00049 } 00050 00051 char *av_stristr(const char *s1, const char *s2) 00052 { 00053 if (!*s2) 00054 return s1; 00055 00056 do { 00057 if (av_stristart(s1, s2, NULL)) 00058 return s1; 00059 } while (*s1++); 00060 00061 return NULL; 00062 } 00063 00064 size_t av_strlcpy(char *dst, const char *src, size_t size) 00065 { 00066 size_t len = 0; 00067 while (++len < size && *src) 00068 *dst++ = *src++; 00069 if (len <= size) 00070 *dst = 0; 00071 return len + strlen(src) - 1; 00072 } 00073 00074 size_t av_strlcat(char *dst, const char *src, size_t size) 00075 { 00076 size_t len = strlen(dst); 00077 if (size <= len + 1) 00078 return len + strlen(src); 00079 return len + av_strlcpy(dst + len, src, size - len); 00080 } 00081 00082 size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...) 00083 { 00084 int len = strlen(dst); 00085 va_list vl; 00086 00087 va_start(vl, fmt); 00088 len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl); 00089 va_end(vl); 00090 00091 return len; 00092 } 00093 00094 char *av_d2str(double d) 00095 { 00096 char *str= av_malloc(16); 00097 if(str) snprintf(str, 16, "%f", d); 00098 return str; 00099 }