PeerStreamer

/*

 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard

 * Copyright (c) 2007 Mans Rullgard

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg 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.

 *

 * FFmpeg 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 FFmpeg; 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"

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;

}

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;

}