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Diffstat (limited to 'src/input_archive.c')
| -rw-r--r-- | src/input_archive.c | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/input_archive.c b/src/input_archive.c new file mode 100644 index 000000000..4f573bd78 --- /dev/null +++ b/src/input_archive.c @@ -0,0 +1,154 @@ +/* the Music Player Daemon (MPD) + * Copyright (C) 2008 Viliam Mateicka <viliam.mateicka@gmail.com> + * This project's homepage is: http://www.musicpd.org + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program 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 General Public License for more details. + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "archive_api.h" +#include "archive_list.h" +#include "input_archive.h" +#include "input_stream.h" +#include "gcc.h" +#include "log.h" +#include "ls.h" +#include "utils.h" + +#include <stdbool.h> +#include <sys/stat.h> +#include <fcntl.h> +#include <unistd.h> +#include <errno.h> +#include <string.h> +#include <assert.h> +#include <glib.h> + +typedef struct { + const struct archive_plugin *aplugin; + const struct input_plugin *iplugin; + struct archive_file *file; +} archive_context; + +/** + * select correct archive plugin to handle the input stream + * may allow stacking of archive plugins. for example for handling + * tar.gz a gzip handler opens file (through inputfile stream) + * then it opens a tar handler and sets gzip inputstream as + * parent_stream so tar plugin fetches file data from gzip + * plugin and gzip fetches file from disk + */ +static bool +input_archive_open(struct input_stream *is, const char *pathname) +{ + archive_context *arch_ctx; + const struct archive_plugin *arplug; + char *archive, *filename, *suffix, *pname; + bool opened; + + if (pathname[0] != '/') + return false; + + pname = g_strdup(pathname); + // archive_lookup will modify pname when true is returned + if (!archive_lookup(pname, &archive, &filename, &suffix)) { + g_debug("not an archive, lookup %s failed\n", pname); + g_free(pname); + return false; + } + + //check which archive plugin to use (by ext) + arplug = archive_plugin_from_suffix(suffix); + if (!arplug) { + g_warning("can't handle archive %s\n",archive); + g_free(pname); + return false; + } + + arch_ctx = (archive_context *) g_malloc(sizeof(archive_context)); + + //setup archive plugin pointer + arch_ctx->aplugin = arplug; + //open archive file + arch_ctx->file = arplug->open(archive); + //setup fileops + arplug->setup_stream(arch_ctx->file, is); + //setup input plugin backup + arch_ctx->iplugin = is->plugin; + is->plugin = &input_plugin_archive; + + //internal handle + is->data = arch_ctx; + + //open archive + opened = arch_ctx->iplugin->open(is, filename); + + if (!opened) { + g_warning("open inarchive file %s failed\n\n",filename); + } else { + is->ready = true; + } + g_free(pname); + return opened; +} + +static void +input_archive_close(struct input_stream *is) +{ + archive_context *arch_ctx = (archive_context *)is->data; + //close archive infile ops + arch_ctx->iplugin->close(is); + //close archive + arch_ctx->aplugin->close(arch_ctx->file); + //free private data + g_free(arch_ctx); +} + +static bool +input_archive_seek(struct input_stream *is, off_t offset, int whence) +{ + archive_context *arch_ctx = (archive_context *)is->data; + return arch_ctx->iplugin->seek(is, offset, whence); +} + +static size_t +input_archive_read(struct input_stream *is, void *ptr, size_t size) +{ + archive_context *arch_ctx = (archive_context *)is->data; + assert(ptr != NULL); + assert(size > 0); + return arch_ctx->iplugin->read(is, ptr, size); +} + +static bool +input_archive_eof(struct input_stream *is) +{ + archive_context *arch_ctx = (archive_context *)is->data; + return arch_ctx->iplugin->eof(is); +} + +static int +input_archive_buffer(struct input_stream *is) +{ + archive_context *arch_ctx = (archive_context *)is->data; + return arch_ctx->iplugin->buffer(is); +} + +const struct input_plugin input_plugin_archive = { + .open = input_archive_open, + .close = input_archive_close, + .buffer = input_archive_buffer, + .read = input_archive_read, + .eof = input_archive_eof, + .seek = input_archive_seek, +}; |