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ffmpeg / libavutil / string.c @ b76e3424

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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>
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#include <string.h>
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#include <ctype.h>
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#include "avstring.h"
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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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    }
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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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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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}
67 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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}