1 files changed, 238 insertions, 0 deletions
diff --git a/src/archive/plugins/Iso9660ArchivePlugin.cxx b/src/archive/plugins/Iso9660ArchivePlugin.cxx
new file mode 100644
index 000000000..ba415d3c5
--- /dev/null
+++ b/src/archive/plugins/Iso9660ArchivePlugin.cxx
@@ -0,0 +1,238 @@
+/*
+ * Copyright (C) 2003-2014 The Music Player Daemon Project
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+/**
+  * iso archive handling (requires cdio, and iso9660)
+  */
+
+#include "config.h"
+#include "Iso9660ArchivePlugin.hxx"
+#include "../ArchivePlugin.hxx"
+#include "../ArchiveFile.hxx"
+#include "../ArchiveVisitor.hxx"
+#include "input/InputStream.hxx"
+#include "input/InputPlugin.hxx"
+#include "fs/Path.hxx"
+#include "util/RefCount.hxx"
+#include "util/Error.hxx"
+#include "util/Domain.hxx"
+
+#include <cdio/iso9660.h>
+
+#include <stdlib.h>
+#include <string.h>
+
+#define CEILING(x, y) ((x+(y-1))/y)
+
+class Iso9660ArchiveFile final : public ArchiveFile {
+	RefCount ref;
+
+	iso9660_t *iso;
+
+public:
+	Iso9660ArchiveFile(iso9660_t *_iso)
+		:ArchiveFile(iso9660_archive_plugin), iso(_iso) {}
+
+	~Iso9660ArchiveFile() {
+		iso9660_close(iso);
+	}
+
+	void Ref() {
+		ref.Increment();
+	}
+
+	void Unref() {
+		if (ref.Decrement())
+			delete this;
+	}
+
+	long SeekRead(void *ptr, lsn_t start, long int i_size) const {
+		return iso9660_iso_seek_read(iso, ptr, start, i_size);
+	}
+
+	void Visit(const char *path, ArchiveVisitor &visitor);
+
+	virtual void Close() override {
+		Unref();
+	}
+
+	virtual void Visit(ArchiveVisitor &visitor) override;
+
+	virtual InputStream *OpenStream(const char *path,
+					Mutex &mutex, Cond &cond,
+					Error &error) override;
+};
+
+static constexpr Domain iso9660_domain("iso9660");
+
+/* archive open && listing routine */
+
+inline void
+Iso9660ArchiveFile::Visit(const char *psz_path, ArchiveVisitor &visitor)
+{
+	CdioList_t *entlist;
+	CdioListNode_t *entnode;
+	iso9660_stat_t *statbuf;
+	char pathname[4096];
+
+	entlist = iso9660_ifs_readdir (iso, psz_path);
+	if (!entlist) {
+		return;
+	}
+	/* Iterate over the list of nodes that iso9660_ifs_readdir gives  */
+	_CDIO_LIST_FOREACH (entnode, entlist) {
+		statbuf = (iso9660_stat_t *) _cdio_list_node_data (entnode);
+
+		strcpy(pathname, psz_path);
+		strcat(pathname, statbuf->filename);
+
+		if (iso9660_stat_s::_STAT_DIR == statbuf->type ) {
+			if (strcmp(statbuf->filename, ".") && strcmp(statbuf->filename, "..")) {
+				strcat(pathname, "/");
+				Visit(pathname, visitor);
+			}
+		} else {
+			//remove leading /
+			visitor.VisitArchiveEntry(pathname + 1);
+		}
+	}
+	_cdio_list_free (entlist, true);
+}
+
+static ArchiveFile *
+iso9660_archive_open(Path pathname, Error &error)
+{
+	/* open archive */
+	auto iso = iso9660_open(pathname.c_str());
+	if (iso == nullptr) {
+		error.Format(iso9660_domain,
+			     "Failed to open ISO9660 file %s",
+			     pathname.c_str());
+		return nullptr;
+	}
+
+	return new Iso9660ArchiveFile(iso);
+}
+
+void
+Iso9660ArchiveFile::Visit(ArchiveVisitor &visitor)
+{
+	Visit("/", visitor);
+}
+
+/* single archive handling */
+
+class Iso9660InputStream final : public InputStream {
+	Iso9660ArchiveFile &archive;
+
+	iso9660_stat_t *statbuf;
+
+public:
+	Iso9660InputStream(Iso9660ArchiveFile &_archive, const char *_uri,
+			   Mutex &_mutex, Cond &_cond,
+			   iso9660_stat_t *_statbuf)
+		:InputStream(_uri, _mutex, _cond),
+		 archive(_archive), statbuf(_statbuf) {
+		size = statbuf->size;
+		SetReady();
+
+		archive.Ref();
+	}
+
+	~Iso9660InputStream() {
+		free(statbuf);
+		archive.Unref();
+	}
+
+	/* virtual methods from InputStream */
+	bool IsEOF() override;
+	size_t Read(void *ptr, size_t size, Error &error) override;
+};
+
+InputStream *
+Iso9660ArchiveFile::OpenStream(const char *pathname,
+			       Mutex &mutex, Cond &cond,
+			       Error &error)
+{
+	auto statbuf = iso9660_ifs_stat_translate(iso, pathname);
+	if (statbuf == nullptr) {
+		error.Format(iso9660_domain,
+			     "not found in the ISO file: %s", pathname);
+		return nullptr;
+	}
+
+	return new Iso9660InputStream(*this, pathname, mutex, cond,
+				      statbuf);
+}
+
+size_t
+Iso9660InputStream::Read(void *ptr, size_t read_size, Error &error)
+{
+	int readed = 0;
+	int no_blocks, cur_block;
+	size_t left_bytes = statbuf->size - offset;
+
+	if (left_bytes < read_size) {
+		no_blocks = CEILING(left_bytes, ISO_BLOCKSIZE);
+	} else {
+		no_blocks = read_size / ISO_BLOCKSIZE;
+	}
+
+	if (no_blocks == 0)
+		return 0;
+
+	cur_block = offset / ISO_BLOCKSIZE;
+
+	readed = archive.SeekRead(ptr, statbuf->lsn + cur_block,
+				  no_blocks);
+
+	if (readed != no_blocks * ISO_BLOCKSIZE) {
+		error.Format(iso9660_domain,
+			     "error reading ISO file at lsn %lu",
+			     (unsigned long)cur_block);
+		return 0;
+	}
+	if (left_bytes < read_size) {
+		readed = left_bytes;
+	}
+
+	offset += readed;
+	return readed;
+}
+
+bool
+Iso9660InputStream::IsEOF()
+{
+	return offset == size;
+}
+
+/* exported structures */
+
+static const char *const iso9660_archive_extensions[] = {
+	"iso",
+	nullptr
+};
+
+const ArchivePlugin iso9660_archive_plugin = {
+	"iso",
+	nullptr,
+	nullptr,
+	iso9660_archive_open,
+	iso9660_archive_extensions,
+};