/* * Copyright (c) 2000, 2001, 2002 Fabrice Bellard * Copyright (c) 2007 Mans Rullgard * * This file is part of Libav. * * Libav 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 2.1 of the License, or (at your option) any later version. * * Libav 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 Libav; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include <stdarg.h>#include <stdio.h>#include <string.h>#include <ctype.h>#include "avstring.h"#include "mem.h" int av_strstart(const char *str, const char *pfx, const char **ptr){    while (*pfx && *pfx == *str) {        pfx++;        str++;    }    if (!*pfx && ptr)        *ptr = str;    return !*pfx;} int av_stristart(const char *str, const char *pfx, const char **ptr){    while (*pfx && toupper((unsigned)*pfx) == toupper((unsigned)*str)) {        pfx++;        str++;    }    if (!*pfx && ptr)        *ptr = str;    return !*pfx;} char *av_stristr(const char *s1, const char *s2){    if (!*s2)        return s1;     do {        if (av_stristart(s1, s2, NULL))            return s1;    } while (*s1++);     return NULL;} size_t av_strlcpy(char *dst, const char *src, size_t size){    size_t len = 0;    while (++len < size && *src)        *dst++ = *src++;    if (len <= size)        *dst = 0;    return len + strlen(src) - 1;} size_t av_strlcat(char *dst, const char *src, size_t size){    size_t len = strlen(dst);    if (size <= len + 1)        return len + strlen(src);    return len + av_strlcpy(dst + len, src, size - len);} size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...){    int len = strlen(dst);    va_list vl;     va_start(vl, fmt);    len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);    va_end(vl);     return len;} char *av_d2str(double d){    char *str= av_malloc(16);    if(str) snprintf(str, 16, "%f", d);    return str;} #define WHITESPACES " \n\t" char *av_get_token(const char **buf, const char *term){    char *out = av_malloc(strlen(*buf) + 1);    char *ret= out, *end= out;    const char *p = *buf;    if (!out) return NULL;    p += strspn(p, WHITESPACES);     while(*p && !strspn(p, term)) {        char c = *p++;        if(c == '\\' && *p){            *out++ = *p++;            end= out;        }else if(c == '\''){            while(*p && *p != '\'')                *out++ = *p++;            if(*p){                p++;                end= out;            }        }else{            *out++ = c;        }    }     do{        *out-- = 0;    }while(out >= end && strspn(out, WHITESPACES));     *buf = p;     return ret;} int av_strcasecmp(const char *a, const char *b){    uint8_t c1, c2;    do {        c1 = av_tolower(*a++);        c2 = av_tolower(*b++);    } while (c1 && c1 == c2);    return c1 - c2;} int av_strncasecmp(const char *a, const char *b, size_t n){    const char *end = a + n;    uint8_t c1, c2;    do {        c1 = av_tolower(*a++);        c2 = av_tolower(*b++);    } while (a < end && c1 && c1 == c2);    return c1 - c2;} #ifdef TEST #undef printf int main(void){    int i;     printf("Testing av_get_token()\n");    {        const char *strings[] = {            "''",            "",            ":",            "\\",            "'",            "    ''    :",            "    ''  ''  :",            "foo   '' :",            "'foo'",            "foo     ",            "  '  foo  '  ",            "foo\\",            "foo':  blah:blah",            "foo\\:  blah:blah",            "foo\'",            "'foo :  '  :blahblah",            "\\ :blah",            "     foo",            "      foo       ",            "      foo     \\ ",            "foo ':blah",            " foo   bar    :   blahblah",            "\\f\\o\\o",            "'foo : \\ \\  '   : blahblah",            "'\\fo\\o:': blahblah",            "\\'fo\\o\\:':  foo  '  :blahblah"        };         for (i=0; i < FF_ARRAY_ELEMS(strings); i++) {            const char *p= strings[i];            printf("|%s|", p);            printf(" -> |%s|", av_get_token(&p, ":"));            printf(" + |%s|\n", p);        }    }     return 0;} #endif /* TEST */