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ffmpeg / libavutil / avstring.c @ d370e3e9

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1 fc78ce80 Måns Rullgård
/*
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 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
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 * Copyright (c) 2007 Mans Rullgard
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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22 1e7f3638 Luca Abeni
#include <stdarg.h>
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#include <stdio.h>
24 fc78ce80 Måns Rullgård
#include <string.h>
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#include <ctype.h>
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#include "avstring.h"
27 64b12fc3 Michael Niedermayer
#include "mem.h"
28 fc78ce80 Måns Rullgård
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int av_strstart(const char *str, const char *pfx, const char **ptr)
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{
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    while (*pfx && *pfx == *str) {
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        pfx++;
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        str++;
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    }
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    if (!*pfx && ptr)
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        *ptr = str;
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    return !*pfx;
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}
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int av_stristart(const char *str, const char *pfx, const char **ptr)
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{
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    while (*pfx && toupper((unsigned)*pfx) == toupper((unsigned)*str)) {
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        pfx++;
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        str++;
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    }
46 fc78ce80 Måns Rullgård
    if (!*pfx && ptr)
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        *ptr = str;
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    return !*pfx;
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}
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51 ac6ef868 Måns Rullgård
char *av_stristr(const char *s1, const char *s2)
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{
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    if (!*s2)
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        return s1;
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    do {
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        if (av_stristart(s1, s2, NULL))
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            return s1;
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    } while (*s1++);
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    return NULL;
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}
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64 fc78ce80 Måns Rullgård
size_t av_strlcpy(char *dst, const char *src, size_t size)
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{
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    size_t len = 0;
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    while (++len < size && *src)
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        *dst++ = *src++;
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    if (len <= size)
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        *dst = 0;
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    return len + strlen(src) - 1;
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}
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size_t av_strlcat(char *dst, const char *src, size_t size)
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{
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    size_t len = strlen(dst);
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    if (size <= len + 1)
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        return len + strlen(src);
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    return len + av_strlcpy(dst + len, src, size - len);
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}
81 1e7f3638 Luca Abeni
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size_t av_strlcatf(char *dst, size_t size, const char *fmt, ...)
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{
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    int len = strlen(dst);
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    va_list vl;
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    va_start(vl, fmt);
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    len += vsnprintf(dst + len, size > len ? size - len : 0, fmt, vl);
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    va_end(vl);
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    return len;
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}
93 277c7332 Michael Niedermayer
94 b3e88ae8 Michael Niedermayer
char *av_d2str(double d)
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{
96 277c7332 Michael Niedermayer
    char *str= av_malloc(16);
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    if(str) snprintf(str, 16, "%f", d);
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    return str;
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}
100 372e2884 Stefano Sabatini
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#define WHITESPACES " \n\t"
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char *av_get_token(const char **buf, const char *term)
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{
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    char *out = av_malloc(strlen(*buf) + 1);
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    char *ret= out, *end= out;
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    const char *p = *buf;
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    if (!out) return NULL;
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    p += strspn(p, WHITESPACES);
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    while(*p && !strspn(p, term)) {
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        char c = *p++;
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        if(c == '\\' && *p){
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            *out++ = *p++;
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            end= out;
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        }else if(c == '\''){
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            while(*p && *p != '\'')
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                *out++ = *p++;
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            if(*p){
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                p++;
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                end= out;
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            }
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        }else{
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            *out++ = c;
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        }
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    }
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    do{
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        *out-- = 0;
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    }while(out >= end && strspn(out, WHITESPACES));
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    *buf = p;
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    return ret;
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}
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#ifdef TEST
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#undef printf
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int main(void)
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{
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    int i;
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    printf("Testing av_get_token()\n");
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    {
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        const char *strings[] = {
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            "''",
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            "",
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            ":",
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            "\\",
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            "'",
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            "    ''    :",
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            "    ''  ''  :",
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            "foo   '' :",
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            "'foo'",
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            "foo     ",
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            "  '  foo  '  ",
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            "foo\\",
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            "foo':  blah:blah",
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            "foo\\:  blah:blah",
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            "foo\'",
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            "'foo :  '  :blahblah",
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            "\\ :blah",
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            "     foo",
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            "      foo       ",
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            "      foo     \\ ",
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            "foo ':blah",
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            " foo   bar    :   blahblah",
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            "\\f\\o\\o",
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            "'foo : \\ \\  '   : blahblah",
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            "'\\fo\\o:': blahblah",
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            "\\'fo\\o\\:':  foo  '  :blahblah"
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        };
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        for (i=0; i < FF_ARRAY_ELEMS(strings); i++) {
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            const char *p= strings[i];
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            printf("|%s|", p);
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            printf(" -> |%s|", av_get_token(&p, ":"));
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            printf(" + |%s|\n", p);
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        }
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    }
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    return 0;
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}
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#endif /* TEST */