archive/*: move to archive/plugins/
This commit is contained in:
Max Kellermann
275
src/archive/plugins/Iso9660ArchivePlugin.cxx
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275
src/archive/plugins/Iso9660ArchivePlugin.cxx
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/*
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* Copyright (C) 2003-2014 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 "../ArchivePlugin.hxx"
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#include "../ArchiveFile.hxx"
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#include "../ArchiveVisitor.hxx"
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#include "InputStream.hxx"
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#include "InputPlugin.hxx"
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#include "util/RefCount.hxx"
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#include "util/Error.hxx"
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#include "util/Domain.hxx"
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#include <cdio/iso9660.h>
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#include <stdlib.h>
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#include <string.h>
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#define CEILING(x, y) ((x+(y-1))/y)
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class Iso9660ArchiveFile final : public ArchiveFile {
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RefCount ref;
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iso9660_t *iso;
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public:
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Iso9660ArchiveFile(iso9660_t *_iso)
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:ArchiveFile(iso9660_archive_plugin), iso(_iso) {}
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~Iso9660ArchiveFile() {
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iso9660_close(iso);
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}
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void Ref() {
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ref.Increment();
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}
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void Unref() {
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if (ref.Decrement())
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delete this;
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}
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long SeekRead(void *ptr, lsn_t start, long int i_size) const {
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return iso9660_iso_seek_read(iso, ptr, start, i_size);
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}
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void Visit(const char *path, ArchiveVisitor &visitor);
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virtual void Close() override {
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Unref();
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}
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virtual void Visit(ArchiveVisitor &visitor) override;
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virtual InputStream *OpenStream(const char *path,
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Mutex &mutex, Cond &cond,
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Error &error) override;
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};
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extern const InputPlugin iso9660_input_plugin;
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static constexpr Domain iso9660_domain("iso9660");
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/* archive open && listing routine */
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inline void
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Iso9660ArchiveFile::Visit(const char *psz_path, ArchiveVisitor &visitor)
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{
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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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Visit(pathname, visitor);
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}
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} else {
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//remove leading /
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visitor.VisitArchiveEntry(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 ArchiveFile *
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iso9660_archive_open(const char *pathname, Error &error)
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{
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/* open archive */
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auto iso = iso9660_open(pathname);
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if (iso == nullptr) {
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error.Format(iso9660_domain,
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"Failed to open ISO9660 file %s", pathname);
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return nullptr;
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}
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return new Iso9660ArchiveFile(iso);
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}
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void
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Iso9660ArchiveFile::Visit(ArchiveVisitor &visitor)
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{
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Visit("/", visitor);
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}
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/* single archive handling */
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class Iso9660InputStream {
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InputStream base;
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Iso9660ArchiveFile &archive;
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iso9660_stat_t *statbuf;
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public:
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Iso9660InputStream(Iso9660ArchiveFile &_archive, const char *uri,
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Mutex &mutex, Cond &cond,
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iso9660_stat_t *_statbuf)
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:base(iso9660_input_plugin, uri, mutex, cond),
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archive(_archive), statbuf(_statbuf) {
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base.ready = true;
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base.size = statbuf->size;
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archive.Ref();
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}
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~Iso9660InputStream() {
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free(statbuf);
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archive.Unref();
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}
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InputStream *Get() {
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return &base;
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}
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size_t Read(void *ptr, size_t size, Error &error);
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};
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InputStream *
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Iso9660ArchiveFile::OpenStream(const char *pathname,
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Mutex &mutex, Cond &cond,
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Error &error)
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{
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auto statbuf = iso9660_ifs_stat_translate(iso, pathname);
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if (statbuf == nullptr) {
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error.Format(iso9660_domain,
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"not found in the ISO file: %s", pathname);
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return nullptr;
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}
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Iso9660InputStream *iis =
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new Iso9660InputStream(*this, pathname, mutex, cond,
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statbuf);
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return iis->Get();
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}
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static void
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iso9660_input_close(InputStream *is)
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{
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Iso9660InputStream *iis = (Iso9660InputStream *)is;
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delete iis;
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}
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inline size_t
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Iso9660InputStream::Read(void *ptr, size_t size, Error &error)
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{
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int readed = 0;
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int no_blocks, cur_block;
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size_t left_bytes = statbuf->size - base.offset;
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if (left_bytes < size) {
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no_blocks = CEILING(left_bytes,ISO_BLOCKSIZE);
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} else {
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no_blocks = size / ISO_BLOCKSIZE;
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}
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if (no_blocks == 0)
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return 0;
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cur_block = base.offset / ISO_BLOCKSIZE;
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readed = archive.SeekRead(ptr, statbuf->lsn + cur_block,
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no_blocks);
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if (readed != no_blocks * ISO_BLOCKSIZE) {
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error.Format(iso9660_domain,
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"error reading ISO file at lsn %lu",
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(unsigned long)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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base.offset += readed;
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return readed;
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}
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static size_t
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iso9660_input_read(InputStream *is, void *ptr, size_t size,
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Error &error)
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{
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Iso9660InputStream *iis = (Iso9660InputStream *)is;
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return iis->Read(ptr, size, error);
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}
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static bool
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iso9660_input_eof(InputStream *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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nullptr
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};
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const InputPlugin 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_extensions,
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};
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