~ppsspp/ppsspp/ffmpeg-upstream

/*

 * URL utility functions

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

 *

 * 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 "avformat.h"

#include "config.h"

#include "url.h"

#if CONFIG_NETWORK

#include "network.h"

#endif

#include "libavutil/avstring.h"

/**

 * @file

 * URL utility functions.

 */

int ff_url_join(char *str, int size, const char *proto,

                const char *authorization, const char *hostname,

                int port, const char *fmt, ...)

{

#if CONFIG_NETWORK

    struct addrinfo hints = { 0 }, *ai;

#endif

    str[0] = '\0';

    if (proto)

        av_strlcatf(str, size, "%s://", proto);

    if (authorization && authorization[0])

        av_strlcatf(str, size, "%s@", authorization);

#if CONFIG_NETWORK && defined(AF_INET6)

    /* Determine if hostname is a numerical IPv6 address,

     * properly escape it within [] in that case. */

    hints.ai_flags = AI_NUMERICHOST;

    if (!getaddrinfo(hostname, NULL, &hints, &ai)) {

        if (ai->ai_family == AF_INET6) {

            av_strlcat(str, "[", size);

            av_strlcat(str, hostname, size);

            av_strlcat(str, "]", size);

        } else {

            av_strlcat(str, hostname, size);

        }

        freeaddrinfo(ai);

    } else

#endif

        /* Not an IPv6 address, just output the plain string. */

        av_strlcat(str, hostname, size);

    if (port >= 0)

        av_strlcatf(str, size, ":%d", port);

    if (fmt) {

        va_list vl;

        size_t len = strlen(str);

        va_start(vl, fmt);

        vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);

        va_end(vl);

    }

    return strlen(str);

}

void ff_make_absolute_url(char *buf, int size, const char *base,

                          const char *rel)

{

    char *sep, *path_query;

    /* Absolute path, relative to the current server */

    if (base && strstr(base, "://") && rel[0] == '/') {

        if (base != buf)

            av_strlcpy(buf, base, size);

        sep = strstr(buf, "://");

        if (sep) {

            /* Take scheme from base url */

            if (rel[1] == '/') {

                sep[1] = '\0';

            } else {

                /* Take scheme and host from base url */

                sep += 3;

                sep = strchr(sep, '/');

                if (sep)

                    *sep = '\0';

            }

        }

        av_strlcat(buf, rel, size);

        return;

    }

    /* If rel actually is an absolute url, just copy it */

    if (!base || strstr(rel, "://") || rel[0] == '/') {

        av_strlcpy(buf, rel, size);

        return;

    }

    if (base != buf)

        av_strlcpy(buf, base, size);

    /* Strip off any query string from base */

    path_query = strchr(buf, '?');

    if (path_query)

        *path_query = '\0';

    /* Is relative path just a new query part? */

    if (rel[0] == '?') {

        av_strlcat(buf, rel, size);

        return;

    }

    /* Remove the file name from the base url */

    sep = strrchr(buf, '/');

    if (sep)

        sep[1] = '\0';

    else

        buf[0] = '\0';

    while (av_strstart(rel, "../", NULL) && sep) {

        /* Remove the path delimiter at the end */

        sep[0] = '\0';

        sep = strrchr(buf, '/');

        /* If the next directory name to pop off is "..", break here */

        if (!strcmp(sep ? &sep[1] : buf, "..")) {

            /* Readd the slash we just removed */

            av_strlcat(buf, "/", size);

            break;

        }

        /* Cut off the directory name */

        if (sep)

            sep[1] = '\0';

        else

            buf[0] = '\0';

        rel += 3;

    }

    av_strlcat(buf, rel, size);

}

AVIODirEntry *ff_alloc_dir_entry(void)

{

    AVIODirEntry *entry = av_mallocz(sizeof(AVIODirEntry));

    if (entry) {

        entry->type = AVIO_ENTRY_UNKNOWN;

        entry->size = -1;

        entry->modification_timestamp = -1;

        entry->access_timestamp = -1;

        entry->status_change_timestamp = -1;

        entry->user_id = -1;

        entry->group_id = -1;

        entry->filemode = -1;

    }

    return entry;

}