+++ /dev/null
-/*
-Copyright (C) 2001-2006, William Joseph.
-All Rights Reserved.
-
-This file is part of GtkRadiant.
-
-GtkRadiant 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.
-
-GtkRadiant 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 GtkRadiant; if not, write to the Free Software
-Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-*/
-
-#if !defined(INCLUDED_PKZIP_H)
-#define INCLUDED_PKZIP_H
-
-#include "bytestreamutils.h"
-#include "idatastream.h"
-#include <algorithm>
-
-class zip_magic
-{
-public:
- bool operator==(const zip_magic& other) const
- {
- return m_value[0] == other.m_value[0]
- && m_value[1] == other.m_value[1]
- && m_value[2] == other.m_value[2]
- && m_value[3] == other.m_value[3];
- }
- bool operator!=(const zip_magic& other) const
- {
- return !(*this == other);
- }
- char m_value[4];
-};
-
-inline void istream_read_zip_magic(InputStream& istream, zip_magic& magic)
-{
- istream.read(reinterpret_cast<InputStream::byte_type*>(magic.m_value), 4);
-}
-
-struct zip_version
-{
- char version;
- char ostype;
-};
-
-inline void istream_read_zip_version(InputStream& istream, zip_version& version)
-{
- version.version = istream_read_byte(istream);
- version.ostype = istream_read_byte(istream);
-}
-
-struct zip_dostime
-{
- unsigned short time;
- unsigned short date;
-};
-
-inline void istream_read_zip_dostime(InputStream& istream, zip_dostime& dostime)
-{
- dostime.time = istream_read_int16_le(istream);
- dostime.date = istream_read_int16_le(istream);
-}
-
-const zip_magic zip_file_header_magic = { { 'P', 'K', 0x03, 0x04 } };
-
-/* A. Local file header */
-struct zip_file_header
-{
- zip_magic z_magic; /* local file header signature (0x04034b50) */
- zip_version z_extract; /* version needed to extract */
- unsigned short z_flags; /* general purpose bit flag */
- unsigned short z_compr; /* compression method */
- zip_dostime z_dostime; /* last mod file time (dos format) */
- unsigned int z_crc32; /* crc-32 */
- unsigned int z_csize; /* compressed size */
- unsigned int z_usize; /* uncompressed size */
- unsigned short z_namlen; /* filename length (null if stdin) */
- unsigned short z_extras; /* extra field length */
- /* followed by filename (of variable size) */
- /* followed by extra field (of variable size) */
-};
-
-inline void istream_read_zip_file_header(SeekableInputStream& istream, zip_file_header& file_header)
-{
- istream_read_zip_magic(istream, file_header.z_magic);
- istream_read_zip_version(istream, file_header.z_extract);
- file_header.z_flags = istream_read_uint16_le(istream);
- file_header.z_compr = istream_read_uint16_le(istream);
- istream_read_zip_dostime(istream, file_header.z_dostime);
- file_header.z_crc32 = istream_read_uint32_le(istream);
- file_header.z_csize = istream_read_uint32_le(istream);
- file_header.z_usize = istream_read_uint32_le(istream);
- file_header.z_namlen = istream_read_uint16_le(istream);
- file_header.z_extras = istream_read_uint16_le(istream);
- istream.seek(file_header.z_namlen + file_header.z_extras, SeekableInputStream::cur);
-};
-
-/* B. data descriptor
- * the data descriptor exists only if bit 3 of z_flags is set. It is byte aligned
- * and immediately follows the last byte of compressed data. It is only used if
- * the output media of the compressor was not seekable, eg. standard output.
- */
-const zip_magic zip_file_trailer_magic = { { 'P', 'K', 0x07, 0x08} };
-
-struct zip_file_trailer
-{
- zip_magic z_magic;
- unsigned int z_crc32; /* crc-32 */
- unsigned int z_csize; /* compressed size */
- unsigned int z_usize; /* uncompressed size */
-};
-
-inline void istream_read_zip_file_trailer(InputStream& istream, zip_file_trailer& file_trailer)
-{
- istream_read_zip_magic(istream, file_trailer.z_magic);
- file_trailer.z_crc32 = istream_read_uint32_le(istream);
- file_trailer.z_csize = istream_read_uint32_le(istream);
- file_trailer.z_usize = istream_read_uint32_le(istream);
-};
-
-
-/* C. central directory structure:
- [file header] . . . end of central dir record
-*/
-
-/* directory file header
- * - a single entry including filename, extras and comment may not exceed 64k.
- */
-
-const zip_magic zip_root_dirent_magic = { { 'P', 'K', 0x01, 0x02 } };
-
-struct zip_root_dirent
-{
- zip_magic z_magic;
- zip_version z_encoder; /* version made by */
- zip_version z_extract; /* version need to extract */
- unsigned short z_flags; /* general purpose bit flag */
- unsigned short z_compr; /* compression method */
- zip_dostime z_dostime; /* last mod file time&date (dos format) */
- unsigned int z_crc32; /* crc-32 */
- unsigned int z_csize; /* compressed size */
- unsigned int z_usize; /* uncompressed size */
- unsigned short z_namlen; /* filename length (null if stdin) */
- unsigned short z_extras; /* extra field length */
- unsigned short z_comment; /* file comment length */
- unsigned short z_diskstart; /* disk number of start (if spanning zip over multiple disks) */
- unsigned short z_filetype; /* internal file attributes, bit0 = ascii */
- unsigned int z_filemode; /* extrnal file attributes, eg. msdos attrib byte */
- unsigned int z_off; /* relative offset of local file header, seekval if singledisk */
- /* followed by filename (of variable size) */
- /* followed by extra field (of variable size) */
- /* followed by file comment (of variable size) */
-};
-
-inline void istream_read_zip_root_dirent(SeekableInputStream& istream, zip_root_dirent& root_dirent)
-{
- istream_read_zip_magic(istream, root_dirent.z_magic);
- istream_read_zip_version(istream, root_dirent.z_encoder);
- istream_read_zip_version(istream, root_dirent.z_extract);
- root_dirent.z_flags = istream_read_uint16_le(istream);
- root_dirent.z_compr = istream_read_uint16_le(istream);
- istream_read_zip_dostime(istream, root_dirent.z_dostime);
- root_dirent.z_crc32 = istream_read_uint32_le(istream);
- root_dirent.z_csize = istream_read_uint32_le(istream);
- root_dirent.z_usize = istream_read_uint32_le(istream);
- root_dirent.z_namlen = istream_read_uint16_le(istream);
- root_dirent.z_extras = istream_read_uint16_le(istream);
- root_dirent.z_comment = istream_read_uint16_le(istream);
- root_dirent.z_diskstart = istream_read_uint16_le(istream);
- root_dirent.z_filetype = istream_read_uint16_le(istream);
- root_dirent.z_filemode = istream_read_uint32_le(istream);
- root_dirent.z_off = istream_read_uint32_le(istream);
- istream.seek(root_dirent.z_namlen + root_dirent.z_extras + root_dirent.z_comment, SeekableInputStream::cur);
-}
-
- /* end of central dir record */
-const zip_magic zip_disk_trailer_magic = { { 'P', 'K', 0x05, 0x06 } };
-const unsigned int disk_trailer_length = 22;
-struct zip_disk_trailer
-{
- zip_magic z_magic;
- unsigned short z_disk; /* number of this disk */
- unsigned short z_finaldisk; /* number of the disk with the start of the central dir */
- unsigned short z_entries; /* total number of entries in the central dir on this disk */
- unsigned short z_finalentries; /* total number of entries in the central dir */
- unsigned int z_rootsize; /* size of the central directory */
- unsigned int z_rootseek; /* offset of start of central directory with respect to *
- * the starting disk number */
- unsigned short z_comment; /* zipfile comment length */
- /* followed by zipfile comment (of variable size) */
-};
-
-inline void istream_read_zip_disk_trailer(SeekableInputStream& istream, zip_disk_trailer& disk_trailer)
-{
- istream_read_zip_magic(istream, disk_trailer.z_magic);
- disk_trailer.z_disk = istream_read_uint16_le(istream);
- disk_trailer.z_finaldisk = istream_read_uint16_le(istream);
- disk_trailer.z_entries = istream_read_uint16_le(istream);
- disk_trailer.z_finalentries = istream_read_uint16_le(istream);
- disk_trailer.z_rootsize = istream_read_uint32_le(istream);
- disk_trailer.z_rootseek = istream_read_uint32_le(istream);
- disk_trailer.z_comment = istream_read_uint16_le(istream);
- istream.seek(disk_trailer.z_comment, SeekableInputStream::cur);
-}
-
-inline SeekableStream::position_type pkzip_find_disk_trailer(SeekableInputStream& istream)
-{
- istream.seek(0, SeekableInputStream::end);
- SeekableStream::position_type start_position = istream.tell();
- if(start_position < disk_trailer_length)
- return 0;
- start_position -= disk_trailer_length;
-
- zip_magic magic;
- istream.seek(start_position);
- istream_read_zip_magic(istream, magic);
-
- if(magic == zip_disk_trailer_magic)
- return start_position;
- else
- {
- const SeekableStream::position_type max_comment = 0x10000;
- const SeekableStream::position_type bufshift = 6;
- const SeekableStream::position_type bufsize = max_comment >> bufshift;
- unsigned char buffer[bufsize];
-
- SeekableStream::position_type search_end = (max_comment < start_position) ? start_position - max_comment : 0;
- SeekableStream::position_type position = start_position;
- while(position != search_end)
- {
- StreamBase::size_type to_read = std::min(bufsize, position - search_end);
- position -= to_read;
-
- istream.seek(position);
- StreamBase::size_type size = istream.read(buffer, to_read);
-
- unsigned char* p = buffer + size;
- while(p != buffer)
- {
- --p;
- magic.m_value[3] = magic.m_value[2];
- magic.m_value[2] = magic.m_value[1];
- magic.m_value[1] = magic.m_value[0];
- magic.m_value[0] = *p;
- if(magic == zip_disk_trailer_magic)
- {
- return position + (p - buffer);
- }
- }
- }
- return 0;
- }
-}
-
-#endif
projects / voretournament / voretournament.git / blobdiff