/*
 * Copyright (c) 2001, 2008, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code 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
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */
#include <stdint.h>
typedef unsigned short ushort;
typedef unsigned int uint32_t;
typedef unsigned char uchar;

struct unpacker;

struct jar
{
	// JAR file writer
	FILE *jarfp;
	int default_modtime;

	// Used by unix2dostime:
	int modtime_cache;
	uint32_t dostime_cache;

	// Private members
	fillbytes central_directory;
	ushort central_directory_count;
	uint32_t output_file_offset;
	fillbytes deflated; // temporary buffer

	// pointer to outer unpacker, for error checks etc.
	unpacker *u;

	// Public Methods
	void openJarFile(const char *fname);
	void addJarEntry(const char *fname, bool deflate_hint, int modtime, bytes &head,
					 bytes &tail);
	void addDirectoryToJarFile(const char *dir_name);
	void closeJarFile(bool central);

	void init(unpacker *u_);

	void free()
	{
		central_directory.free();
		deflated.free();
	}

	void reset()
	{
		free();
		init(u);
	}

	// Private Methods
	void write_data(void *ptr, int len);
	void write_data(bytes &b)
	{
		write_data(b.ptr, (int)b.len);
	}
	void add_to_jar_directory(const char *fname, bool store, int modtime, int len, int clen,
							  uint32_t crc);
	void write_jar_header(const char *fname, bool store, int modtime, int len, int clen,
						  unsigned int crc);
	void write_central_directory();
	uint32_t dostime(int y, int n, int d, int h, int m, int s);
	uint32_t get_dostime(int modtime);

	// The definitions of these depend on the NO_ZLIB option:
	bool deflate_bytes(bytes &head, bytes &tail);
	static uint32_t get_crc32(uint32_t c, unsigned char *ptr, uint32_t len);
};

struct gunzip
{
	// optional gzip input stream control block

	// pointer to outer unpacker, for error checks etc.
	unpacker *u;

	void *read_input_fn; // underlying \bchar\b stream
	void *zstream;	   // inflater state
	char inbuf[1 << 14]; // input buffer

	void init(unpacker *u_); // pushes new value on u->read_input_fn

	void free();

	void start(int magic);

	// private stuff
	void read_fixed_field(char *buf, size_t buflen);
};