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+/*
+ * Author:
+ * Guido Draheim <guidod@gmx.de>
+ *
+ * Copyright (c) 2000,2001,2002,2003 Guido Draheim
+ * All rights reserved
+ * use under the restrictions of the
+ * Lesser GNU General Public License
+ * or alternatively the restrictions
+ * of the Mozilla Public License 1.1
+ *
+ * The information was taken from appnote-981119-iz.zip
+ * at http://www.freesoftware.com/pub/infozip/doc/
+ * which in turn is based on PKWARE's appnote.txt
+ * (newer link: ftp://ftp.info-zip.org/pub/infozip/doc/)
+ */
+#ifndef _ZZIP_FORMAT_H /* zzipformat.h */
+#define _ZZIP_FORMAT_H
+
+#include <zzip/types.h>
+#include <zzip/__hints.h>
+/* we have ICO C 9X types defined */
+
+/*
+ * Overall zipfile format
+ * [local file header + file data stream + checksum descriptor] ...
+ * ... [disk central directory] [disk trailer record]
+ */
+
+# ifdef _MSC_VER
+# pragma pack(push, 1)
+# endif
+
+struct zzip_version
+{
+ zzip_byte_t version[1];
+ zzip_byte_t ostype[1];
+} ZZIP_GNUC_PACKED;
+
+struct zzip_dostime
+{
+ zzip_byte_t time[2];
+ zzip_byte_t date[2];
+} ZZIP_GNUC_PACKED;
+
+#ifdef ZZIP_NEED_PACKED
+/* if your compiler does interesting things about struct packing... */
+typedef zzip_byte_t zzip_version_t[2];
+typedef zzip_byte_t zzip_dostime_t[4];
+#else
+typedef struct zzip_version zzip_version_t;
+typedef struct zzip_dostime zzip_dostime_t;
+#endif
+
+#define ZZIP_CHECKMAGIC(__p,__A,__B,__C,__D) \
+ ( (((zzip_byte_t*)(__p))[0]==(__A)) && \
+ (((zzip_byte_t*)(__p))[1]==(__B)) && \
+ (((zzip_byte_t*)(__p))[2]==(__C)) && \
+ (((zzip_byte_t*)(__p))[3]==(__D)) )
+
+/* A. Local file header */
+struct zzip_file_header
+{
+# define ZZIP_FILE_HEADER_MAGIC 0x04034b50
+# define ZZIP_FILE_HEADER_CHECKMAGIC(__p) ZZIP_CHECKMAGIC(__p,'P','K','\3','\4')
+ zzip_byte_t z_magic[4]; /* local file header signature (0x04034b50) */
+ zzip_version_t z_extract; /* version needed to extract */
+ zzip_byte_t z_flags[2]; /* general purpose bit flag */
+ zzip_byte_t z_compr[2]; /* compression method */
+ zzip_dostime_t z_dostime; /* last mod file time (dos format) */
+ zzip_byte_t z_crc32[4]; /* crc-32 */
+ zzip_byte_t z_csize[4]; /* compressed size */
+ zzip_byte_t z_usize[4]; /* uncompressed size */
+ zzip_byte_t z_namlen[2]; /* filename length (null if stdin) */
+ zzip_byte_t z_extras[2]; /* extra field length */
+ /* followed by filename (of variable size) */
+ /* followed by extra field (of variable size) */
+} ZZIP_GNUC_PACKED;
+#define zzip_file_header_headerlength (4+2+2+2+4+4+4+4+2+2)
+
+/* 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.
+ */
+struct zzip_file_trailer
+{
+# define ZZIP_FILE_TRAILER_MAGIC 0x08074B50
+# define ZZIP_FILE_TRAILER_CHECKMAGIC(__p) ZZIP_CHECKMAGIC(__p,'P','K','\7','\8')
+ zzip_byte_t z_magic[4]; /* data descriptor signature (0x08074b50) */
+ zzip_byte_t z_crc32[4]; /* crc-32 */
+ zzip_byte_t z_csize[4]; /* compressed size */
+ zzip_byte_t z_usize[4]; /* uncompressed size */
+} ZZIP_GNUC_PACKED;
+#define zzip_file_trailer_headerlength (4+4+4+4)
+
+/* 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.
+ */
+
+struct zzip_disk_entry
+{
+# define ZZIP_DISK_ENTRY_MAGIC 0x02014b50
+# define ZZIP_DISK_ENTRY_CHECKMAGIC(__p) ZZIP_CHECKMAGIC(__p,'P','K','\1','\2')
+ zzip_byte_t z_magic[4]; /* central file header signature (0x02014b50) */
+ zzip_version_t z_encoder; /* version made by */
+ zzip_version_t z_extract; /* version need to extract */
+ zzip_byte_t z_flags[2]; /* general purpose bit flag */
+ zzip_byte_t z_compr[2]; /* compression method */
+ zzip_dostime_t z_dostime; /* last mod file time&date (dos format) */
+ zzip_byte_t z_crc32[4]; /* crc-32 */
+ zzip_byte_t z_csize[4]; /* compressed size */
+ zzip_byte_t z_usize[4]; /* uncompressed size */
+ zzip_byte_t z_namlen[2]; /* filename length (null if stdin) */
+ zzip_byte_t z_extras[2]; /* extra field length */
+ zzip_byte_t z_comment[2]; /* file comment length */
+ zzip_byte_t z_diskstart[2]; /* disk number of start (if spanning zip over multiple disks) */
+ zzip_byte_t z_filetype[2]; /* internal file attributes, bit0 = ascii */
+ zzip_byte_t z_filemode[4]; /* extrnal file attributes, eg. msdos attrib byte */
+ zzip_byte_t z_offset[4]; /* 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) */
+} ZZIP_GNUC_PACKED;
+#define zzip_disk_entry_headerlength (4+2+2+2+2+4+4+4+4+2+2+2+2+2+4+4)
+
+
+struct zzip_root_dirent
+{ /* the old name of the structure above */
+# define ZZIP_ROOT_DIRENT_MAGIC 0x02014b50
+# define ZZIP_ROOT_DIRENT_CHECKMAGIC(__p) ZZIP_DISK_ENTRY_CHECKMAGIC(__p)
+ zzip_byte_t z_magic[4];
+ zzip_version_t z_encoder;
+ zzip_version_t z_extract;
+ zzip_byte_t z_flags[2];
+ zzip_byte_t z_compr[2];
+ zzip_dostime_t z_dostime;
+ zzip_byte_t z_crc32[4];
+ zzip_byte_t z_csize[4];
+ zzip_byte_t z_usize[4];
+ zzip_byte_t z_namlen[2];
+ zzip_byte_t z_extras[2];
+ zzip_byte_t z_comment[2];
+ zzip_byte_t z_diskstart[2];
+ zzip_byte_t z_filetype[2];
+ zzip_byte_t z_filemode[4];
+ zzip_byte_t z_off[4];
+} ZZIP_GNUC_PACKED;
+
+
+/* end of central dir record */
+struct zzip_disk_trailer
+{
+# define ZZIP_DISK_TRAILER_MAGIC 0x06054b50
+# define ZZIP_DISK_TRAILER_CHECKMAGIC(__p) ZZIP_CHECKMAGIC(__p,'P','K','\5','\6')
+ zzip_byte_t z_magic[4]; /* end of central dir signature (0x06054b50) */
+ zzip_byte_t z_disk[2]; /* number of this disk */
+ zzip_byte_t z_finaldisk[2]; /* number of the disk with the start of the central dir */
+ zzip_byte_t z_entries[2]; /* total number of entries in the central dir on this disk */
+ zzip_byte_t z_finalentries[2]; /* total number of entries in the central dir */
+ zzip_byte_t z_rootsize[4]; /* size of the central directory */
+ zzip_byte_t z_rootseek[4]; /* offset of start of central directory with respect to *
+ * the starting disk number */
+ zzip_byte_t z_comment[2]; /* zipfile comment length */
+ /* followed by zipfile comment (of variable size) */
+} ZZIP_GNUC_PACKED;
+#define zzip_disk_trailer_headerlength (4+2+2+2+2+4+4+2)
+
+/* extra field should be type + size + data + type + size + data ... */
+struct zzip_extra_block
+{ /* fetch.h macros do not need this struct */
+ zzip_byte_t z_datatype[2]; /* as input type - a mere <char*> is okay */
+ zzip_byte_t z_datasize[2]; /* being returned by xx_to_extras usually */
+} ZZIP_GNUC_PACKED;
+#define zzip_extra_block_headerlength (2+2)
+
+/* Zip64 end of central dir record */
+struct zzip_disk64_trailer
+{
+# define ZZIP_DISK64_TRAILER_MAGIC 0x06064b50
+# define ZZIP_DISK64_TRAILER_CHECKMAGIC(__p) ZZIP_CHECKMAGIC(__p,'P','K','\6','\6')
+ zzip_byte_t z_magic[4]; /* end of central dir signature (0x06054b50) */
+ zzip_byte_t z_size[8]; /* size of this central directory record */
+ zzip_version_t z_encoder; /* version made by */
+ zzip_version_t z_extract; /* version need to extract */
+ zzip_byte_t z_disk[4]; /* number of this disk */
+ zzip_byte_t z_finaldisk[4]; /* number of the disk with the start of the central dir */
+ zzip_byte_t z_entries[8]; /* total number of entries in the central dir on this disk */
+ zzip_byte_t z_finalentries[8]; /* total number of entries in the central dir */
+ zzip_byte_t z_rootsize[8]; /* size of the central directory */
+ zzip_byte_t z_rootseek[8]; /* offset of start of central directory with respect to *
+ * the starting disk number */
+ /* followed by zip64 extensible data sector (of variable size) */
+} ZZIP_GNUC_PACKED;
+#define zzip_disk64_trailer_headerlength (4+8+2+2+4+4+8+8+8+8)
+
+/* z_flags */
+#define ZZIP_IS_ENCRYPTED(p) ((*(zzip_byte_t*)p)&1)
+#define ZZIP_IS_COMPRLEVEL(p) (((*(zzip_byte_t*)p)>>1)&3)
+#define ZZIP_IS_STREAMED(p) (((*(zzip_byte_t*)p)>>3)&1)
+#define ZZIP_IS_PATCHED(p) (((*(zzip_byte_t*)p)>>5)&1)
+
+/* z_compr */
+#define ZZIP_IS_STORED 0
+#define ZZIP_IS_SHRUNK 1
+#define ZZIP_IS_REDUCEDx1 2
+#define ZZIP_IS_REDUCEDx2 3
+#define ZZIP_IS_REDUCEDx3 4
+#define ZZIP_IS_REDUCEDx4 5
+#define ZZIP_IS_IMPLODED 6
+#define ZZIP_IS_TOKENIZED 7
+#define ZZIP_IS_DEFLATED 8
+#define ZZIP_IS_DEFLATED_BETTER 9
+#define ZZIP_IS_IMPLODED_BETTER 10
+
+/* deflated comprlevel */
+#define ZZIP_DEFLATED_STD_COMPR 0
+#define ZZIP_DEFLATED_MAX_COMPR 1
+#define ZZIP_DEFLATED_LOW_COMPR 2
+#define ZZIP_DEFLATED_MIN_COMPR 3
+
+# ifdef _MSC_VER
+# pragma pack(pop)
+# endif
+
+#endif /* _ZZIPFORMAT_H */
+
+
+
+