archive/*: convert to C++
This commit is contained in:
Max Kellermann
302
src/archive/Iso9660ArchivePlugin.cxx
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302
src/archive/Iso9660ArchivePlugin.cxx
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/*
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* Copyright (C) 2003-2013 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program 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
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/**
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* iso archive handling (requires cdio, and iso9660)
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*/
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#include "config.h"
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#include "Iso9660ArchivePlugin.hxx"
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#include "ArchiveInternal.hxx"
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#include "ArchivePlugin.hxx"
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#include "input_internal.h"
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#include "input_plugin.h"
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#include "refcount.h"
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#include <cdio/cdio.h>
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#include <cdio/iso9660.h>
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#include <glib.h>
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#include <string.h>
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#define CEILING(x, y) ((x+(y-1))/y)
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struct iso9660_archive_file {
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struct archive_file base;
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struct refcount ref;
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iso9660_t *iso;
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GSList *list;
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GSList *iter;
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};
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extern const struct input_plugin iso9660_input_plugin;
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static inline GQuark
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iso9660_quark(void)
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{
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return g_quark_from_static_string("iso9660");
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}
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/* archive open && listing routine */
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static void
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listdir_recur(const char *psz_path, struct iso9660_archive_file *context)
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{
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iso9660_t *iso = context->iso;
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CdioList_t *entlist;
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CdioListNode_t *entnode;
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iso9660_stat_t *statbuf;
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char pathname[4096];
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entlist = iso9660_ifs_readdir (iso, psz_path);
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if (!entlist) {
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return;
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}
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/* Iterate over the list of nodes that iso9660_ifs_readdir gives */
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_CDIO_LIST_FOREACH (entnode, entlist) {
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statbuf = (iso9660_stat_t *) _cdio_list_node_data (entnode);
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strcpy(pathname, psz_path);
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strcat(pathname, statbuf->filename);
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if (iso9660_stat_s::_STAT_DIR == statbuf->type ) {
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if (strcmp(statbuf->filename, ".") && strcmp(statbuf->filename, "..")) {
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strcat(pathname, "/");
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listdir_recur(pathname, context);
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}
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} else {
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//remove leading /
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context->list = g_slist_prepend( context->list,
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g_strdup(pathname + 1));
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}
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}
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_cdio_list_free (entlist, true);
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}
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static struct archive_file *
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iso9660_archive_open(const char *pathname, GError **error_r)
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{
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struct iso9660_archive_file *context =
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g_new(struct iso9660_archive_file, 1);
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archive_file_init(&context->base, &iso9660_archive_plugin);
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refcount_init(&context->ref);
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context->list = NULL;
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/* open archive */
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context->iso = iso9660_open (pathname);
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if (context->iso == NULL) {
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g_set_error(error_r, iso9660_quark(), 0,
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"Failed to open ISO9660 file %s", pathname);
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return NULL;
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}
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listdir_recur("/", context);
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return &context->base;
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}
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static void
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iso9660_archive_scan_reset(struct archive_file *file)
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{
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struct iso9660_archive_file *context =
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(struct iso9660_archive_file *)file;
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//reset iterator
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context->iter = context->list;
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}
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static char *
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iso9660_archive_scan_next(struct archive_file *file)
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{
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struct iso9660_archive_file *context =
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(struct iso9660_archive_file *)file;
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char *data = NULL;
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if (context->iter != NULL) {
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///fetch data and goto next
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data = (char *)context->iter->data;
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context->iter = g_slist_next(context->iter);
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}
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return data;
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}
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static void
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iso9660_archive_close(struct archive_file *file)
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{
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struct iso9660_archive_file *context =
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(struct iso9660_archive_file *)file;
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GSList *tmp;
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if (!refcount_dec(&context->ref))
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return;
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if (context->list) {
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//free list
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for (tmp = context->list; tmp != NULL; tmp = g_slist_next(tmp))
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g_free(tmp->data);
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g_slist_free(context->list);
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}
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//close archive
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iso9660_close(context->iso);
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g_free(context);
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}
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/* single archive handling */
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struct iso9660_input_stream {
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struct input_stream base;
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struct iso9660_archive_file *archive;
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iso9660_stat_t *statbuf;
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size_t max_blocks;
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};
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static struct input_stream *
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iso9660_archive_open_stream(struct archive_file *file, const char *pathname,
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GMutex *mutex, GCond *cond,
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GError **error_r)
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{
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struct iso9660_archive_file *context =
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(struct iso9660_archive_file *)file;
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struct iso9660_input_stream *iis;
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iis = g_new(struct iso9660_input_stream, 1);
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input_stream_init(&iis->base, &iso9660_input_plugin, pathname,
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mutex, cond);
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iis->archive = context;
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iis->statbuf = iso9660_ifs_stat_translate(context->iso, pathname);
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if (iis->statbuf == NULL) {
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g_free(iis);
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g_set_error(error_r, iso9660_quark(), 0,
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"not found in the ISO file: %s", pathname);
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return NULL;
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}
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iis->base.ready = true;
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//we are not seekable
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iis->base.seekable = false;
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iis->base.size = iis->statbuf->size;
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iis->max_blocks = CEILING(iis->statbuf->size, ISO_BLOCKSIZE);
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refcount_inc(&context->ref);
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return &iis->base;
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}
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static void
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iso9660_input_close(struct input_stream *is)
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{
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struct iso9660_input_stream *iis = (struct iso9660_input_stream *)is;
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g_free(iis->statbuf);
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iso9660_archive_close(&iis->archive->base);
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input_stream_deinit(&iis->base);
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g_free(iis);
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}
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static size_t
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iso9660_input_read(struct input_stream *is, void *ptr, size_t size, GError **error_r)
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{
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struct iso9660_input_stream *iis = (struct iso9660_input_stream *)is;
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int toread, readed = 0;
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int no_blocks, cur_block;
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size_t left_bytes = iis->statbuf->size - is->offset;
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size = (size * ISO_BLOCKSIZE) / ISO_BLOCKSIZE;
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if (left_bytes < size) {
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toread = left_bytes;
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no_blocks = CEILING(left_bytes,ISO_BLOCKSIZE);
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} else {
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toread = size;
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no_blocks = toread / ISO_BLOCKSIZE;
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}
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if (no_blocks > 0) {
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cur_block = is->offset / ISO_BLOCKSIZE;
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readed = iso9660_iso_seek_read (iis->archive->iso, ptr,
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iis->statbuf->lsn + cur_block, no_blocks);
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if (readed != no_blocks * ISO_BLOCKSIZE) {
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g_set_error(error_r, iso9660_quark(), 0,
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"error reading ISO file at lsn %lu",
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(long unsigned int) cur_block);
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return 0;
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}
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if (left_bytes < size) {
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readed = left_bytes;
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}
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is->offset += readed;
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}
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return readed;
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}
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static bool
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iso9660_input_eof(struct input_stream *is)
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{
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return is->offset == is->size;
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}
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/* exported structures */
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static const char *const iso9660_archive_extensions[] = {
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"iso",
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NULL
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};
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const struct input_plugin iso9660_input_plugin = {
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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iso9660_input_close,
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nullptr,
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nullptr,
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nullptr,
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nullptr,
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iso9660_input_read,
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iso9660_input_eof,
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nullptr,
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};
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const struct archive_plugin iso9660_archive_plugin = {
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"iso",
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nullptr,
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nullptr,
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iso9660_archive_open,
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iso9660_archive_scan_reset,
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iso9660_archive_scan_next,
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iso9660_archive_open_stream,
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iso9660_archive_close,
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iso9660_archive_extensions,
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};
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