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/*
The code here is based on code by Mark Adler et al. which is
Copyright (c) 1990-2005 Info-ZIP. Specifically, it derives from zip
version 2.31. Modifications are by Allin Cottrell, March, 2006.
Please see the included file "LICENSE" which contains the Info-ZIP
license information.
*/
#ifndef ZUNZ_PRIVATE_H_
#define ZUNZ_PRIVATE_H_
#include "libgretl.h"
#include "version.h"
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <sys/stat.h>
#ifdef S_IFLNK
# define LSTAT lstat
#else
# define LSTAT stat
#endif
/* for recording "version made by" in zipfiles */
#define Z_MAJORVER 2
#define Z_MINORVER 3
/* include library's public header */
#include "zipunzip.h"
/* these OS codes are defined in pkzip appnote.txt */
#ifdef WIN32
# define OS_CODE 0xb00
#else
# define OS_CODE 0x300 /* assume unix */
#endif
/* option accessor macros */
#define recurse(o) (o & ZIP_RECURSE_DIRS)
#define delete_inputs(o) (o & ZIP_DELETE_INPUTS)
#define put_links(o) (o & ZIP_PUT_LINKS)
/* minimum and maximum match lengths */
#define MIN_MATCH 3
#define MAX_MATCH 258
/* window size = 32K */
#define WSIZE (0x8000)
/* Minimum amount of lookahead, except at the end of the input file.
* See deflate.c in zip-2.31 for comments about the MIN_MATCH + 1.
*/
#define MIN_LOOKAHEAD (MAX_MATCH + MIN_MATCH + 1)
/* Structure carrying extended timestamp information */
typedef struct iztimes_ iztimes;
struct iztimes_ {
time_t atime; /* new access time */
time_t mtime; /* new modification time */
time_t ctime; /* new creation time (!= Unix st.ctime) */
};
/* Lengths of headers after signatures in bytes */
#define LOCHEAD 26
#define CENHEAD 42
#define ENDHEAD 18
/* MSDOS file or directory attributes */
#define MSDOS_DIR_ATTR 0x10
enum {
MARK_NONE,
MARK_ZIP,
MARK_UNZIP,
MARK_DELETE
};
/* Structures for in-memory file information */
typedef struct zlist_ zlist;
/* See also zipfile structure info in zipfile.c */
struct zlist_ {
guint16 version_made; /* zip version by which file compressed */
guint16 version_extract; /* zip version required to extract */
guint16 flags; /* encrypt, deflate flags */
guint16 method; /* compression method */
guint32 time; /* last modified file time, DOS format */
guint32 crc; /* uncompressed crc-32 for file */
guint32 csize; /* compressed size */
guint32 usize; /* uncompressed size */
size_t namelen; /* length of filename */
size_t extlen; /* offset of extlen must be >= LOCHEAD */
size_t cextlen; /* extlen as in central directory */
size_t comlen; /* comment length */
guint16 dsk; /* disk number start */
guint16 att; /* file attributes */
guint16 lflags; /* offset of lflags must be >= LOCHEAD */
guint32 atx; /* extended attributes */
guint32 off; /* offset in file */
gchar *name; /* File name in zip file */
gchar *iname; /* Internal file name after cleanup */
gchar *zname; /* External version of internal name */
char *extra; /* Extra field (set only if ext != 0) */
char *cextra; /* Extra in central (set only if cext != 0) */
char *comment; /* Comment (set only if com != 0) */
int mark; /* Marker for files to operate on */
int dosflag; /* Set to force MSDOS file attributes */
zlist *nxt; /* Pointer to next header in list */
};
typedef struct flist_ flist;
struct flist_ {
gchar *name; /* Raw internal file name */
gchar *iname; /* Internal file name after cleanup */
gchar *zname; /* External version of internal name */
flist **lst; /* Pointer to link pointing here */
flist *nxt; /* Link to next name */
};
enum {
ZF_STATE_UNKNOWN,
ZF_STATE_OLD,
ZF_STATE_NEW
};
typedef struct zfile_ zfile;
struct zfile_ {
ZipOption opt; /* option flags */
int state; /* unknown, pre-existing file, or new file */
char *fname; /* file name */
FILE *fp; /* file pointer */
int method; /* compression method */
int level; /* compression level */
int zstart; /* starting offset of zip structures */
int zcount; /* number of files in zip file */
int zcomlen; /* length of zip file comment */
char *zcomment; /* zip file comment (not zero-terminated) */
int fcount; /* count of source files */
zlist **zsort; /* list of files sorted by name */
guint32 tempzn; /* count of bytes written to output file */
z_stream strm; /* stream for deflation/inflation */
int strm_initted; /* flag: is strm initialized yet? */
const char **wanted; /* array of filenames wanted for extraction */
const char *eprefix; /* path to prepend on extraction */
char *matches; /* array for recording matches of wanted files */
};
/* internal file attribute */
#define UNKNOWN (-1)
#define BINARY 0
#define ASCII 1
/* extra field definitions */
#define EF_IZUNIX 0x5855 /* UNIX Extra Field ID ("UX") */
#define EF_IZUNIX2 0x7855 /* Info-ZIP's new Unix ("Ux") */
#define EF_TIME 0x5455 /* universal timestamp ("UT") */
#define EF_OS2EA 0x0009 /* OS/2 Extra Field ID (extended attributes) */
#define EF_ACL 0x4C41 /* ACL Extra Field ID (access control list, "AL") */
#define EF_NTSD 0x4453 /* NT Security Descriptor Extra Field ID, ("SD") */
/* Definitions for extra field handling: */
#define EF_SIZE_MAX ((unsigned)0xFFFF) /* hard limit of total e.f. length */
#define EB_HEADSIZE 4 /* length of a extra field block header */
#define EB_ID 0 /* offset of block ID in header */
#define EB_LEN 2 /* offset of data length field in header */
#define EB_MEMCMPR_HSIZ 6 /* header length for memcompressed data */
#define EB_DEFLAT_EXTRA 10 /* overhead for 64kByte "undeflatable" data */
#define EB_UX_MINLEN 8 /* minimal "UX" field contains atime, mtime */
#define EB_UX_ATIME 0 /* offset of atime in "UX" extra field data */
#define EB_UX_MTIME 4 /* offset of mtime in "UX" extra field data */
#define EB_UX_FULLSIZE 12 /* full "UX" field (atime, mtime, uid, gid) */
#define EB_UX_UID 8 /* byte offset of UID in "UX" field data */
#define EB_UX_GID 10 /* byte offset of GID in "UX" field data */
#define EB_UT_MINLEN 1 /* minimal UT field contains Flags byte */
#define EB_UT_FLAGS 0 /* byte offset of Flags field */
#define EB_UT_TIME1 1 /* byte offset of 1st time value */
#define EB_UT_FL_MTIME (1 << 0) /* mtime present */
#define EB_UT_FL_ATIME (1 << 1) /* atime present */
#define EB_UT_FL_CTIME (1 << 2) /* ctime present */
#define EB_UT_LEN(n) (EB_UT_MINLEN + 4 * (n))
#define EB_UX2_MINLEN 4 /* minimal Ux field contains UID/GID */
#define EB_UX2_UID 0 /* byte offset of UID in "Ux" field data */
#define EB_UX2_GID 2 /* byte offset of GID in "Ux" field data */
#define EB_UX2_VALID (1 << 8) /* UID/GID present */
/* Error return codes */
#include "ziperr.h"
#define DOSTIME_MINIMUM ((guint32)0x00210000L)
#define DOSTIME_2038_01_18 ((guint32)0x74320000L)
#define BEST -1 /* Use best method (deflation or store) */
#define STORE 0 /* Store method */
#define DEFLATE 8 /* Deflation method */
/* global vars, in main.c */
extern zlist *zfiles; /* Pointer to list of files in zip file */
extern flist *found; /* List of names found */
extern flist **fnxt; /* Where to put next in found list */
/* end globals */
enum {
ZIP_DO_CHECK,
ZIP_DO_NEW,
ZIP_DO_ZIP,
ZIP_DO_LIST,
ZIP_DO_UNZIP,
ZIP_DO_DELETE
};
/* function prototypes */
/* main.c */
int ziperr (int err, const char *format, ...);
void trace (int level, const char *format, ...);
/* zipwork.c */
int zipup (zfile *zf, zlist *z);
void zlib_deflate_free (zfile *zf);
int decompress_to_file (zfile *zf, zlist *z, long offset);
/* zipfile.c */
int get_ef_ut_ztime (zlist *, iztimes *);
int get_ef_mode (zlist *z);
int delete_input_files (void);
int read_zipfile (zfile *zf, int task);
int put_local_header (zlist *z, FILE *fp);
int put_extended_header (zlist *z, FILE *fp);
int put_central_header (zlist *z, FILE *fp);
int put_end_dir (int nentries, guint32 dirsize, guint32 offset, size_t zcomlen,
const char *comment, FILE *fp);
int zipcopy (zfile *zf, zlist *z, FILE *fp, FILE *fq);
/* fileio.c */
flist *flist_expel (flist *f, int *fcount);
int newname (const char *name, zfile *zf);
time_t dos2unixtime (guint32 dost);
guint32 dostime (int yr, int mon, int day, int hr, int min, int sec);
guint32 unix2dostime (time_t *);
int is_symlink (guint32 attr);
#ifdef S_IFLNK
# define read_symlink(p,b,n) readlink(p,b,n)
#else /* !S_IFLNK */
# define read_symlink(p,b,n) (0)
#endif /* !S_IFLNK */
int replace_file (char *dest, char *src);
int get_file_attributes (const char *fname);
int fcopy (FILE *f, FILE *g, guint32 n);
/* system.c */
char *internal_to_external (const char *iname);
char *external_to_internal (const char *xname, zfile *zf, GError **gerr);
int add_filenames (const char *fname, zfile *zf);
void time_stamp_file (const char *fname, guint32 dost);
guint32 file_mod_time (const char *fname, guint32 *attr, long *fsize, iztimes *t,
zfile *zf);
int set_extra_field (zfile *zf, zlist *z, iztimes *z_utim);
/* filename comparisons */
#ifdef WIN32
# define fnamecmp(a,b) (g_strcasecmp((a),(b)))
/* system.c */
int wanted_namecmp (const char *fname, const char *zname);
#else
# define fnamecmp(a,b) (strcmp((a),(b)))
# define wanted_namecmp(a,b) (strcmp((a),(b)))
#endif
#endif /* ZUNZ_PRIVATE_H_ */
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