Libav 0.7.1
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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 Libav. 00006 * 00007 * Libav 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 * Libav 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 Libav; 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 } 00100 00101 #define WHITESPACES " \n\t" 00102 00103 char *av_get_token(const char **buf, const char *term) 00104 { 00105 char *out = av_malloc(strlen(*buf) + 1); 00106 char *ret= out, *end= out; 00107 const char *p = *buf; 00108 if (!out) return NULL; 00109 p += strspn(p, WHITESPACES); 00110 00111 while(*p && !strspn(p, term)) { 00112 char c = *p++; 00113 if(c == '\\' && *p){ 00114 *out++ = *p++; 00115 end= out; 00116 }else if(c == '\''){ 00117 while(*p && *p != '\'') 00118 *out++ = *p++; 00119 if(*p){ 00120 p++; 00121 end= out; 00122 } 00123 }else{ 00124 *out++ = c; 00125 } 00126 } 00127 00128 do{ 00129 *out-- = 0; 00130 }while(out >= end && strspn(out, WHITESPACES)); 00131 00132 *buf = p; 00133 00134 return ret; 00135 } 00136 00137 #ifdef TEST 00138 00139 #undef printf 00140 00141 int main(void) 00142 { 00143 int i; 00144 00145 printf("Testing av_get_token()\n"); 00146 { 00147 const char *strings[] = { 00148 "''", 00149 "", 00150 ":", 00151 "\\", 00152 "'", 00153 " '' :", 00154 " '' '' :", 00155 "foo '' :", 00156 "'foo'", 00157 "foo ", 00158 " ' foo ' ", 00159 "foo\\", 00160 "foo': blah:blah", 00161 "foo\\: blah:blah", 00162 "foo\'", 00163 "'foo : ' :blahblah", 00164 "\\ :blah", 00165 " foo", 00166 " foo ", 00167 " foo \\ ", 00168 "foo ':blah", 00169 " foo bar : blahblah", 00170 "\\f\\o\\o", 00171 "'foo : \\ \\ ' : blahblah", 00172 "'\\fo\\o:': blahblah", 00173 "\\'fo\\o\\:': foo ' :blahblah" 00174 }; 00175 00176 for (i=0; i < FF_ARRAY_ELEMS(strings); i++) { 00177 const char *p= strings[i]; 00178 printf("|%s|", p); 00179 printf(" -> |%s|", av_get_token(&p, ":")); 00180 printf(" + |%s|\n", p); 00181 } 00182 } 00183 00184 return 0; 00185 } 00186 00187 #endif /* TEST */