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CATSFC/source/unzip/unz.h
Kitty Draper d40ae99422 first commit
2011-03-05 21:39:25 -05:00

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/*---------------------------------------------------------------------------
unzip.h
This header file is used by all of the unzip source files. Its contents
are divided into seven more-or-less separate sections: predefined macros,
OS-dependent includes, (mostly) OS-independent defines, typedefs, function
prototypes (or "prototypes," in the case of non-ANSI compilers), macros,
and global-variable declarations.
---------------------------------------------------------------------------*/
#include "zlib.h"
/*****************************************/
/* Predefined, Machine-specific Macros */
/*****************************************/
#if (defined(__GO32__) && defined(unix)) /* DOS extender */
# undef unix
#endif
#if defined(unix) || defined(__convexc__) || defined(M_XENIX)
# ifndef UNIX
# define UNIX
# endif /* !UNIX */
#endif /* unix || __convexc__ || M_XENIX */
/* Much of the following is swiped from zip's tailor.h: */
/* define MSDOS for Turbo C (unless OS/2) and Power C as well as Microsoft C */
#ifdef __POWERC
# define __TURBOC__
# define MSDOS
#endif /* __POWERC */
#if (defined(__TURBOC__) && defined(__MSDOS__) && !defined(MSDOS))
# define MSDOS
#endif
/* use prototypes and ANSI libraries if __STDC__, or Microsoft or Borland C,
* or Silicon Graphics, or Convex, or IBM C Set/2, or GNU gcc under emx, or
* or Watcom C, or Macintosh, or Windows NT.
*/
#if (__STDC__ || defined(MSDOS) || defined(sgi) || defined(CONVEX) || defined(__sun))
# ifndef PROTO
# define PROTO
# endif
# define MODERN
#endif
#if (defined(__IBMC__) || defined(__EMX__) || defined(__WATCOMC__))
# ifndef PROTO
# define PROTO
# endif
# define MODERN
#endif
#if (defined(THINK_C) || defined(MPW) || defined(WIN32))
# ifndef PROTO
# define PROTO
# endif
# define MODERN
#endif
/* turn off prototypes if requested */
#if (defined(NOPROTO) && defined(PROTO))
# undef PROTO
#endif
#if (defined(ultrix) || defined(bsd4_2) || defined(sun) || defined(pyr))
# if (!defined(BSD) && !defined(__SYSTEM_FIVE) && !defined(SYSV))
# define BSD
# endif /* !BSD && !__SYSTEM_FIVE && !SYSV */
#endif /* ultrix || bsd4_2 || sun || pyr */
#if (defined(CONVEX) || defined(CRAY) || defined(__SYSTEM_FIVE))
# ifndef TERMIO
# define TERMIO
# endif /* !TERMIO */
#endif /* CONVEX || CRAY || __SYSTEM_FIVE */
#ifdef pyr /* Pyramid */
# ifndef ZMEM
# define ZMEM
# endif /* !ZMEM */
#endif /* pyr */
#ifdef CRAY
# ifdef ZMEM
# undef ZMEM
# endif /* ZMEM */
#endif /* CRAY */
/* the i386 test below is to catch SCO Unix (which has redefinition
* warnings if param.h is included), but it probably doesn't hurt if
* other 386 Unixes get nailed, too...except now that 386BSD and BSDI
* exist. Sigh. <sys/param.h> is mostly included for "BSD", I think.
* [An alternate fix for SCO Unix is below.]
*/
#if (defined(MINIX) || (defined(i386) && defined(unix)))
# define NO_PARAM_H
#endif /* MINIX || (i386 && unix) */
/***************************/
/* OS-Dependent Includes */
/***************************/
#ifndef MINIX /* Minix needs it after all the other includes (?) */
# include <stdio.h>
#endif
#include <ctype.h> /* skip for VMS, to use tolower() function? */
#include <errno.h> /* used in mapname() */
#ifndef NO_ERRNO
# define DECLARE_ERRNO /* everybody except MSC 6.0, SCO cc, Watcom C/386 */
#endif /* !NO_ERRNO */
#ifdef VMS
# include <types.h> /* (placed up here instead of in VMS section below */
# include <stat.h> /* because types.h is used in some other headers) */
#else /* !VMS */
# if !defined(THINK_C) && !defined(MPW)
# include <sys/types.h> /* off_t, time_t, dev_t, ... */
# include <sys/stat.h>
# endif /* !THINK_C && !MPW */
#endif /* ?VMS */
#ifdef MODERN
# if (!defined(M_XENIX) && !(defined(__GNUC__) && defined(sun)))
# include <stddef.h>
# endif
# if (!defined(__GNUC__) && !defined(apollo)) /* both define __STDC__ */
# include <stdlib.h> /* standard library prototypes, malloc(), etc. */
# else
# ifdef __EMX__
# include <stdlib.h> /* emx IS gcc but has stdlib.h */
# endif
# endif
# include <string.h> /* defines strcpy, strcmp, memcpy, etc. */
typedef size_t extent;
#else /* !MODERN */
char *malloc();
char *strchr(), *strrchr();
long lseek();
typedef unsigned int extent;
# define void int
#endif /* ?MODERN */
/* this include must be down here for SysV.4, for some reason... */
#include <signal.h> /* used in unzip.c, file_io.c */
/*---------------------------------------------------------------------------
Next, a word from our Unix (mostly) sponsors:
---------------------------------------------------------------------------*/
#ifdef UNIX
# ifdef AMIGA
# include <libraries/dos.h>
# else /* !AMIGA */
# ifndef NO_PARAM_H
#if 0 /* [GRR: this is an alternate fix for SCO's redefinition bug] */
# ifdef NGROUPS_MAX
# undef NGROUPS_MAX /* SCO bug: defined again in <param.h> */
# endif /* NGROUPS_MAX */
#endif /* 0 */
# include <sys/param.h> /* conflict with <sys/types.h>, some systems? */
# endif /* !NO_PARAM_H */
# endif /* ?AMIGA */
# ifndef BSIZE
# ifdef MINIX
# define BSIZE 1024
# else /* !MINIX */
# define BSIZE DEV_BSIZE /* assume common for all Unix systems */
# endif /* ?MINIX */
# endif
# ifndef BSD
# if (!defined(AMIGA) && !defined(MINIX))
# define NO_MKDIR /* for mapname() */
# endif /* !AMIGA && !MINIX */
# include <time.h>
struct tm *gmtime(), *localtime();
# else /* BSD */
# include <sys/time.h>
# include <sys/timeb.h>
# ifdef _AIX
# include <time.h>
# endif
# endif
#else /* !UNIX */
# define BSIZE 512 /* disk block size */
#endif /* ?UNIX */
#if (defined(V7) || defined(BSD))
# define strchr index
# define strrchr rindex
#endif
/*---------------------------------------------------------------------------
And now, our MS-DOS and OS/2 corner:
---------------------------------------------------------------------------*/
#ifdef __TURBOC__
# define DOS_OS2
# include <sys/timeb.h> /* for structure ftime */
# ifndef __BORLANDC__ /* there appears to be a bug (?) in Borland's */
# include <mem.h> /* MEM.H related to __STDC__ and far poin- */
# endif /* ters. (dpk) [mem.h included for memcpy] */
# include <dos.h> /* for REGS macro (at least for Turbo C 2.0) */
#else /* NOT Turbo C (or Power C)... */
# ifdef MSDOS /* but still MS-DOS, so we'll assume it's */
# ifndef MSC /* Microsoft's compiler and fake the ID, if */
# define MSC /* necessary (it is in 5.0; apparently not */
# endif /* in 5.1 and 6.0) */
# include <dos.h> /* for _dos_setftime() */
# endif
#endif
#if (defined(__IBMC__) && defined(__OS2__))
# define DOS_OS2
# define S_IFMT 0xF000
# define timezone _timezone
#endif
#ifdef __WATCOMC__
# define DOS_OS2
# define __32BIT__
# ifdef DECLARE_ERRNO
# undef DECLARE_ERRNO
# endif
# undef far
# define far
#endif
#ifdef __EMX__
# define DOS_OS2
# define __32BIT__
# define far
#endif /* __EMX__ */
#ifdef MSC /* defined for all versions of MSC now */
# define DOS_OS2 /* Turbo C under DOS, MSC under DOS or OS/2 */
# if (defined(_MSC_VER) && (_MSC_VER >= 600)) /* new with 5.1 or 6.0 ... */
# undef DECLARE_ERRNO /* errno is now a function in a dynamic link */
# endif /* library (or something)--incompatible with */
#endif /* the usual "extern int errno" declaration */
#ifdef DOS_OS2 /* defined for all MS-DOS and OS/2 compilers */
# include <io.h> /* lseek(), open(), setftime(), dup(), creat() */
# include <time.h> /* localtime() */
#endif
#ifdef OS2 /* defined for all OS/2 compilers */
# ifdef isupper
# undef isupper
# endif
# ifdef tolower
# undef tolower
# endif
# define isupper(x) IsUpperNLS((unsigned char)(x))
# define tolower(x) ToLowerNLS((unsigned char)(x))
#endif
#ifdef WIN32
# include <io.h> /* read(), open(), etc. */
# include <time.h>
# include <memory.h>
# include <direct.h> /* mkdir() */
# ifdef FILE_IO_C
# include <fcntl.h>
# include <conio.h>
# include <sys\types.h>
# include <sys\utime.h>
# include <windows.h>
# define DOS_OS2
# define getch() getchar()
# endif
#endif
/*---------------------------------------------------------------------------
Followed by some VMS (mostly) stuff:
---------------------------------------------------------------------------*/
#ifdef VMS
# include <time.h> /* the usual non-BSD time functions */
# include <file.h> /* same things as fcntl.h has */
# include <rms.h>
# define _MAX_PATH NAM$C_MAXRSS /* to define FILNAMSIZ below */
# define UNIX /* can share most of same code from now on */
# define RETURN return_VMS /* VMS interprets return codes incorrectly */
#else /* !VMS */
# ifndef THINK_C
# define RETURN return /* only used in main() */
# else
# define RETURN(v) { int n;\
n = (v);\
fprintf(stderr, "\npress <return> to continue ");\
while (getc(stdin) != '\n');\
putc('\n', stderr);\
InitCursor();\
goto start;\
}
# endif
# ifdef V7
# define O_RDONLY 0
# define O_WRONLY 1
# define O_RDWR 2
# else /* !V7 */
# ifdef MTS
# include <sys/file.h> /* MTS uses this instead of fcntl.h */
# include <timeb.h>
# include <time.h>
# else /* !MTS */
# ifdef COHERENT /* Coherent 3.10/Mark Williams C */
# include <sys/fcntl.h>
# define SHORT_NAMES
# define tzset settz
# else /* !COHERENT */
# include <fcntl.h> /* O_BINARY for open() w/o CR/LF translation */
# endif /* ?COHERENT */
# endif /* ?MTS */
# endif /* ?V7 */
#endif /* ?VMS */
#if (defined(MSDOS) || defined(VMS))
# define DOS_VMS
#endif
/*---------------------------------------------------------------------------
And some Mac stuff for good measure:
---------------------------------------------------------------------------*/
#ifdef THINK_C
# define MACOS
# ifndef __STDC__ /* if Think C hasn't defined __STDC__ ... */
# define __STDC__ 1 /* make sure it's defined: it needs it */
# else /* __STDC__ defined */
# if !__STDC__ /* sometimes __STDC__ is defined as 0; */
# undef __STDC__ /* it needs to be 1 or required header */
# define __STDC__ 1 /* files are not properly included. */
# endif /* !__STDC__ */
# endif /* ?defined(__STDC__) */
#endif /* THINK_C */
#ifdef MPW
# define MACOS
# include <Errors.h>
# include <Files.h>
# include <Memory.h>
# include <Quickdraw.h>
# include <ToolUtils.h>
# define CtoPstr c2pstr
# define PtoCstr p2cstr
# ifdef CR
# undef CR
# endif
#endif /* MPW */
#ifdef MACOS
# define open(x,y) macopen(x,y, gnVRefNum, glDirID)
# define close macclose
# define read macread
# define write macwrite
# define lseek maclseek
# define creat(x,y) maccreat(x, gnVRefNum, glDirID, gostCreator, gostType)
# define stat(x,y) macstat(x,y,gnVRefNum, glDirID)
# ifndef isascii
# define isascii(c) ((unsigned char)(c) <= 0x3F)
# endif
# include "macstat.h"
typedef struct _ZipExtraHdr {
unsigned short header; /* 2 bytes */
unsigned short data; /* 2 bytes */
} ZIP_EXTRA_HEADER;
typedef struct _MacInfoMin {
unsigned short header; /* 2 bytes */
unsigned short data; /* 2 bytes */
unsigned long signature; /* 4 bytes */
FInfo finfo; /* 16 bytes */
unsigned long lCrDat; /* 4 bytes */
unsigned long lMdDat; /* 4 bytes */
unsigned long flags ; /* 4 bytes */
unsigned long lDirID; /* 4 bytes */
/*------------*/
} MACINFOMIN; /* = 40 bytes for size of data */
typedef struct _MacInfo {
unsigned short header; /* 2 bytes */
unsigned short data; /* 2 bytes */
unsigned long signature; /* 4 bytes */
FInfo finfo; /* 16 bytes */
unsigned long lCrDat; /* 4 bytes */
unsigned long lMdDat; /* 4 bytes */
unsigned long flags ; /* 4 bytes */
unsigned long lDirID; /* 4 bytes */
char rguchVolName[28]; /* 28 bytes */
/*------------*/
} MACINFO; /* = 68 bytes for size of data */
#endif /* MACOS */
/*---------------------------------------------------------------------------
And finally, some random extra stuff:
---------------------------------------------------------------------------*/
#ifdef MINIX
# include <stdio.h>
#endif
#ifdef SHORT_NAMES /* Mark Williams C, ...? */
# define extract_or_test_files xtr_or_tst_files
# define extract_or_test_member xtr_or_tst_member
#endif
#ifdef MTS
# include <unix.h> /* Some important non-ANSI routines */
# define mkdir(s,n) (-1) /* No "make directory" capability */
# define EBCDIC /* Set EBCDIC conversion on */
#endif
/*************/
/* Defines */
/*************/
#ifndef WSIZE
# define WSIZE 0x8000 /* window size--must be a power of two, and */
#endif /* !WSIZE */ /* at least 32K for zip's deflate method */
#define DIR_BLKSIZ 64 /* number of directory entries per block
* (should fit in 4096 bytes, usually) */
#ifndef INBUFSIZ
# define INBUFSIZ 2048 /* works for MS-DOS small model */
#endif /* !INBUFSIZ */
/*
* If <limits.h> exists on most systems, should include that, since it may
* define some or all of the following: NAME_MAX, PATH_MAX, _POSIX_NAME_MAX,
* _POSIX_PATH_MAX.
*/
#ifdef DOS_OS2
# include <limits.h>
#endif /* DOS_OS2 */
#ifdef _MAX_PATH
# define FILNAMSIZ (_MAX_PATH)
#else /* !_MAX_PATH */
# define FILNAMSIZ 1025
#endif /* ?_MAX_PATH */
#ifndef PATH_MAX
# ifdef MAXPATHLEN /* defined in <sys/param.h> some systems */
# define PATH_MAX MAXPATHLEN
# else
# if FILENAME_MAX > 255 /* used like PATH_MAX on some systems */
# define PATH_MAX FILENAME_MAX
# else
# define PATH_MAX (FILNAMSIZ - 1)
# endif
# endif /* ?MAXPATHLEN */
#endif /* !PATH_MAX */
#define OUTBUFSIZ INBUFSIZ
#define ZSUFX ".zip"
#define CENTRAL_HDR_SIG "\113\001\002" /* the infamous "PK" signature */
#define LOCAL_HDR_SIG "\113\003\004" /* bytes, sans "P" (so unzip */
#define END_CENTRAL_SIG "\113\005\006" /* executable not mistaken for */
#define EXTD_LOCAL_SIG "\113\007\010" /* zipfile itself) */
#define SKIP 0 /* choice of activities for do_string() */
#define DISPLAY 1
#define FILENAME 2
#define EXTRA_FIELD 3
#define DOES_NOT_EXIST -1 /* return values for check_for_newer() */
#define EXISTS_AND_OLDER 0
#define EXISTS_AND_NEWER 1
#define DOS_OS2_FAT_ 0 /* version_made_by codes (central dir) */
#define AMIGA_ 1
#define VMS_ 2 /* make sure these are not defined on */
#define UNIX_ 3 /* the respective systems!! (like, for */
#define VM_CMS_ 4 /* instance, "VMS", or "UNIX": CFLAGS = */
#define ATARI_ 5 /* -O -DUNIX) */
#define OS2_HPFS_ 6
#define MAC_ 7
#define Z_SYSTEM_ 8
#define CPM_ 9
/* #define TOPS20_ 10? (TOPS20_ is to be defined in PKZIP 2.0...) */
#define NUM_HOSTS 10 /* index of last system + 1 */
#define STORED 0 /* compression methods */
#define SHRUNK 1
#define REDUCED1 2
#define REDUCED2 3
#define REDUCED3 4
#define REDUCED4 5
#define IMPLODED 6
#define TOKENIZED 7
#define DEFLATED 8
#define NUM_METHODS 9 /* index of last method + 1 */
/* don't forget to update list_files() appropriately if NUM_METHODS changes */
#define DF_MDY 0 /* date format 10/26/91 (USA only) */
#define DF_DMY 1 /* date format 26/10/91 (most of the world) */
#define DF_YMD 2 /* date format 91/10/26 (a few countries) */
#define UNZIP_VERSION 20 /* compatible with PKUNZIP 2.0 */
#define VMS_VERSION 42 /* if OS-needed-to-extract is VMS: can do */
/*---------------------------------------------------------------------------
True sizes of the various headers, as defined by PKWare--so it is not
likely that these will ever change. But if they do, make sure both these
defines AND the typedefs below get updated accordingly.
---------------------------------------------------------------------------*/
#define LREC_SIZE 26 /* lengths of local file headers, central */
#define CREC_SIZE 42 /* directory headers, and the end-of- */
#define ECREC_SIZE 18 /* central-dir record, respectively */
#define MAX_BITS 13 /* used in unShrink() */
#define HSIZE (1 << MAX_BITS) /* size of global work area */
#define LF 10 /* '\n' on ASCII machines. Must be 10 due to EBCDIC */
#define CR 13 /* '\r' on ASCII machines. Must be 13 due to EBCDIC */
#define CTRLZ 26 /* DOS & OS/2 EOF marker (used in file_io.c, vms.c) */
#ifdef EBCDIC
# define ascii_to_native(c) ebcdic[(c)]
# define NATIVE "EBCDIC"
#endif
#if MPW
# define FFLUSH putc('\n',stderr);
#else /* !MPW */
# define FFLUSH fflush(stderr);
#endif /* ?MPW */
#ifdef VMS
# define ENV_UNZIP "UNZIP_OPTS" /* name of environment variable */
# define ENV_ZIPINFO "ZIPINFO_OPTS"
#else /* !VMS */
# define ENV_UNZIP "UNZIP"
# define ENV_ZIPINFO "ZIPINFO"
#endif /* ?VMS */
#ifdef CRYPT
# define PWLEN 80
# define DECRYPT(b) (update_keys(t=((b)&0xff)^decrypt_byte()),t)
#endif /* CRYPT */
#ifdef QQ /* Newtware version */
# define QCOND (!quietflg) /* for no file comments with -vq or -vqq */
#else /* (original) Bill Davidsen version */
# define QCOND (which_hdr) /* no way to kill file comments with -v, -l */
#endif
#ifndef TRUE
# define TRUE 1 /* sort of obvious */
#endif
#ifndef FALSE
# define FALSE 0
#endif
#ifndef SEEK_SET /* These should all be declared in stdio.h! But */
# define SEEK_SET 0 /* since they're not (in many cases), do so here. */
# define SEEK_CUR 1
# define SEEK_END 2
#endif
#ifndef S_IRUSR
# define S_IRWXU 00700 /* read, write, execute: owner */
# define S_IRUSR 00400 /* read permission: owner */
# define S_IWUSR 00200 /* write permission: owner */
# define S_IXUSR 00100 /* execute permission: owner */
# define S_IRWXG 00070 /* read, write, execute: group */
# define S_IRGRP 00040 /* read permission: group */
# define S_IWGRP 00020 /* write permission: group */
# define S_IXGRP 00010 /* execute permission: group */
# define S_IRWXO 00007 /* read, write, execute: other */
# define S_IROTH 00004 /* read permission: other */
# define S_IWOTH 00002 /* write permission: other */
# define S_IXOTH 00001 /* execute permission: other */
#endif /* !S_IRUSR */
#ifdef ZIPINFO /* these are individually checked because SysV doesn't */
# ifndef S_IFBLK /* have some of them, Microsoft C others, etc. */
# define S_IFBLK 0060000 /* block special */
# endif
# ifndef S_IFIFO /* in Borland C, not MSC */
# define S_IFIFO 0010000 /* fifo */
# endif
# ifndef S_IFLNK /* in BSD, not SysV */
# define S_IFLNK 0120000 /* symbolic link */
# endif
# ifndef S_IFSOCK /* in BSD, not SysV */
# define S_IFSOCK 0140000 /* socket */
# endif
# ifndef S_ISUID
# define S_ISUID 04000 /* set user id on execution */
# endif
# ifndef S_ISGID
# define S_ISGID 02000 /* set group id on execution */
# endif
# ifndef S_ISVTX
# define S_ISVTX 01000 /* directory permissions control */
# endif
# ifndef S_ENFMT
# define S_ENFMT S_ISGID /* record locking enforcement flag */
# endif
#endif /* ZIPINFO */
/**************/
/* Typedefs */
/**************/
#ifndef _BULL_SOURCE /* Bull has it defined somewhere already */
typedef unsigned char byte; /* code assumes UNSIGNED bytes */
#endif /* !_BULL_SOURCE */
typedef char boolean;
typedef long longint;
typedef unsigned short UWORD;
typedef unsigned long ULONG;
typedef unsigned char uch;
typedef unsigned short ush;
typedef unsigned long ulg;
typedef struct min_info {
unsigned unix_attr;
unsigned dos_attr;
int hostnum;
longint offset;
ULONG compr_size; /* compressed size (needed if extended header) */
ULONG crc; /* crc (needed if extended header) */
unsigned encrypted : 1; /* file encrypted: decrypt before uncompressing */
unsigned ExtLocHdr : 1; /* use time instead of CRC for decrypt check */
unsigned text : 1; /* file is text or binary */
unsigned lcflag : 1; /* convert filename to lowercase */
} min_info;
typedef struct VMStimbuf {
char *revdate; /* (both correspond to Unix modtime/st_mtime) */
char *credate;
} VMStimbuf;
/*---------------------------------------------------------------------------
Zipfile layout declarations. If these headers ever change, make sure the
xxREC_SIZE defines (above) change with them!
---------------------------------------------------------------------------*/
typedef byte local_byte_hdr[ LREC_SIZE ];
# define L_VERSION_NEEDED_TO_EXTRACT_0 0
# define L_VERSION_NEEDED_TO_EXTRACT_1 1
# define L_GENERAL_PURPOSE_BIT_FLAG 2
# define L_COMPRESSION_METHOD 4
# define L_LAST_MOD_FILE_TIME 6
# define L_LAST_MOD_FILE_DATE 8
# define L_CRC32 10
# define L_COMPRESSED_SIZE 14
# define L_UNCOMPRESSED_SIZE 18
# define L_FILENAME_LENGTH 22
# define L_EXTRA_FIELD_LENGTH 24
typedef byte cdir_byte_hdr[ CREC_SIZE ];
# define C_VERSION_MADE_BY_0 0
# define C_VERSION_MADE_BY_1 1
# define C_VERSION_NEEDED_TO_EXTRACT_0 2
# define C_VERSION_NEEDED_TO_EXTRACT_1 3
# define C_GENERAL_PURPOSE_BIT_FLAG 4
# define C_COMPRESSION_METHOD 6
# define C_LAST_MOD_FILE_TIME 8
# define C_LAST_MOD_FILE_DATE 10
# define C_CRC32 12
# define C_COMPRESSED_SIZE 16
# define C_UNCOMPRESSED_SIZE 20
# define C_FILENAME_LENGTH 24
# define C_EXTRA_FIELD_LENGTH 26
# define C_FILE_COMMENT_LENGTH 28
# define C_DISK_NUMBER_START 30
# define C_INTERNAL_FILE_ATTRIBUTES 32
# define C_EXTERNAL_FILE_ATTRIBUTES 34
# define C_RELATIVE_OFFSET_LOCAL_HEADER 38
typedef byte ec_byte_rec[ ECREC_SIZE+4 ];
/* define SIGNATURE 0 space-holder only */
# define NUMBER_THIS_DISK 4
# define NUM_DISK_WITH_START_CENTRAL_DIR 6
# define NUM_ENTRIES_CENTRL_DIR_THS_DISK 8
# define TOTAL_ENTRIES_CENTRAL_DIR 10
# define SIZE_CENTRAL_DIRECTORY 12
# define OFFSET_START_CENTRAL_DIRECTORY 16
# define ZIPFILE_COMMENT_LENGTH 20
typedef struct local_file_header { /* LOCAL */
byte version_needed_to_extract[2];
UWORD general_purpose_bit_flag;
UWORD compression_method;
UWORD last_mod_file_time;
UWORD last_mod_file_date;
ULONG crc32;
ULONG compressed_size;
ULONG uncompressed_size;
UWORD filename_length;
UWORD extra_field_length;
} local_file_hdr;
typedef struct central_directory_file_header { /* CENTRAL */
byte version_made_by[2];
byte version_needed_to_extract[2];
UWORD general_purpose_bit_flag;
UWORD compression_method;
UWORD last_mod_file_time;
UWORD last_mod_file_date;
ULONG crc32;
ULONG compressed_size;
ULONG uncompressed_size;
UWORD filename_length;
UWORD extra_field_length;
UWORD file_comment_length;
UWORD disk_number_start;
UWORD internal_file_attributes;
ULONG external_file_attributes;
ULONG relative_offset_local_header;
} cdir_file_hdr;
typedef struct end_central_dir_record { /* END CENTRAL */
UWORD number_this_disk;
UWORD num_disk_with_start_central_dir;
UWORD num_entries_centrl_dir_ths_disk;
UWORD total_entries_central_dir;
ULONG size_central_directory;
ULONG offset_start_central_directory;
UWORD zipfile_comment_length;
} ecdir_rec;
/*************************/
/* Function Prototypes */
/*************************/
#ifndef __
# define __ OF
#endif
/*---------------------------------------------------------------------------
Decompression functions:
---------------------------------------------------------------------------*/
int explode ();
void unReduce ();
void unShrink ();
/*---------------------------------------------------------------------------
Functions in file_io.c and crypt.c:
---------------------------------------------------------------------------*/
int FillBitBuffer ();
int ReadByte __((UWORD *x)); /* file_io.c */
/************/
/* Macros */
/************/
#ifndef MAX
# define MAX(a,b) ((a) > (b) ? (a) : (b))
#endif
#ifndef MIN
# define MIN(a,b) ((a) < (b) ? (a) : (b))
#endif
#define LSEEK(abs_offset) {longint request=(abs_offset)+extra_bytes,\
inbuf_offset=request%INBUFSIZ, bufstart=request-inbuf_offset;\
if(request<0) {fprintf(stderr, SeekMsg, ReportMsg); return(3);}\
else if(bufstart!=cur_zipfile_bufstart)\
{cur_zipfile_bufstart=lseek(zipfd,bufstart,SEEK_SET);\
if((incnt=read(zipfd,(char *)inbuf,INBUFSIZ))<=0) return(51);\
inptr=inbuf+(int)inbuf_offset; incnt-=(int)inbuf_offset;} else\
{incnt+=(inptr-inbuf)-(int)inbuf_offset; inptr=inbuf+(int)inbuf_offset;}}
/*
* Seek to the block boundary of the block which includes abs_offset,
* then read block into input buffer and set pointers appropriately.
* If block is already in the buffer, just set the pointers. This macro
* is used by process_end_central_dir (unzip.c) and do_string (misc.c).
* A slightly modified version is embedded within extract_or_test_files
* (unzip.c). ReadByte and readbuf (file_io.c) are compatible.
*
* macro LSEEK(abs_offset)
* ULONG abs_offset;
* {
* longint request = abs_offset + extra_bytes;
* longint inbuf_offset = request % INBUFSIZ;
* longint bufstart = request - inbuf_offset;
*
* if (request < 0) {
* fprintf(stderr, SeekMsg, ReportMsg);
* return(3); /-* 3: severe error in zipfile *-/
* } else if (bufstart != cur_zipfile_bufstart) {
* cur_zipfile_bufstart = lseek(zipfd, bufstart, SEEK_SET);
* if ((incnt = read(zipfd,inbuf,INBUFSIZ)) <= 0)
* return(51); /-* 51: unexpected EOF *-/
* inptr = inbuf + (int)inbuf_offset;
* incnt -= (int)inbuf_offset;
* } else {
* incnt += (inptr-inbuf) - (int)inbuf_offset;
* inptr = inbuf + (int)inbuf_offset;
* }
* }
*
*/
#define SKIP_(length) if(length&&((error=do_string(length,SKIP))!=0))\
{error_in_archive=error; if(error>1) return error;}
/*
* Skip a variable-length field, and report any errors. Used in zipinfo.c
* and unzip.c in several functions.
*
* macro SKIP_(length)
* UWORD length;
* {
* if (length && ((error = do_string(length, SKIP)) != 0)) {
* error_in_archive = error; /-* might be warning *-/
* if (error > 1) /-* fatal *-/
* return (error);
* }
* }
*
*/
#define READBIT(nbits,zdest) {if(nbits>bits_left) FillBitBuffer();\
zdest=(int)((UWORD)bitbuf&mask_bits[nbits]);bitbuf>>=nbits;bits_left-=nbits;}
/*
* macro READBIT(nbits,zdest)
* {
* if (nbits > bits_left)
* FillBitBuffer();
* zdest = (int)((UWORD)bitbuf & mask_bits[nbits]);
* bitbuf >>= nbits;
* bits_left -= nbits;
* }
*
*/
#define PEEKBIT(nbits) (nbits>bits_left? (FillBitBuffer(),\
(UWORD)bitbuf & mask_bits[nbits]) : (UWORD)bitbuf & mask_bits[nbits])
#define NUKE_CRs(buf,len) {register int i,j; for (i=j=0; j<len;\
(buf)[i++]=(buf)[j++]) if ((buf)[j]=='\r') ++j; len=i;}
/*
* Remove all the ASCII carriage returns from buffer buf (length len),
* shortening as necessary (note that len gets modified in the process,
* so it CANNOT be an expression). This macro is intended to be used
* BEFORE A_TO_N(); hence the check for CR instead of '\r'. NOTE: The
* if-test gets performed one time too many, but it doesn't matter.
*
* macro NUKE_CRs(buf,len)
* {
* register int i, j;
*
* for (i = j = 0; j < len; (buf)[i++] = (buf)[j++])
* if ((buf)[j] == CR)
* ++j;
* len = i;
* }
*
*/
#define TOLOWER(str1,str2) {char *ps1,*ps2; ps1=(str1)-1; ps2=(str2);\
while(*++ps1) *ps2++=(char)(isupper((int)(*ps1))?tolower((int)(*ps1)):*ps1);\
*ps2='\0';}
/*
* Copy the zero-terminated string in str1 into str2, converting any
* uppercase letters to lowercase as we go. str2 gets zero-terminated
* as well, of course. str1 and str2 may be the same character array.
*
* macro TOLOWER( str1, str2 )
* {
* char *ps1, *ps2;
*
* ps1 = (str1) - 1;
* ps2 = (str2);
* while (*++ps1)
* *ps2++ = (char)(isupper((int)(*ps1))? tolower((int)(*ps1)) : *ps1);
* *ps2='\0';
* }
*
* NOTES: This macro makes no assumptions about the characteristics of
* the tolower() function or macro (beyond its existence), nor does it
* make assumptions about the structure of the character set (i.e., it
* should work on EBCDIC machines, too). The fact that either or both
* of isupper() and tolower() may be macros has been taken into account;
* watch out for "side effects" (in the C sense) when modifying this
* macro.
*/
#ifndef ascii_to_native
# define ascii_to_native(c) (c)
# define A_TO_N(str1)
#else
# ifndef NATIVE
# define NATIVE "native chars"
# endif
# define A_TO_N(str1) {register unsigned char *ps1;\
for (ps1=str1; *ps1; ps1++) *ps1=ascii_to_native(*ps1);}
#endif
/*
* Translate the zero-terminated string in str1 from ASCII to the native
* character set. The translation is performed in-place and uses the
* ascii_to_native macro to translate each character.
*
* macro A_TO_N( str1 )
* {
* register unsigned char *ps1;
*
* for (ps1 = str1; *ps1; ++ps1)
* *ps1 = ascii_to_native(*ps1);
* }
*
* NOTE: Using the ascii_to_native macro means that is it the only part of
* unzip which knows which translation table (if any) is actually in use
* to produce the native character set. This makes adding new character
* set translation tables easy, insofar as all that is needed is an
* appropriate ascii_to_native macro definition and the translation
* table itself. Currently, the only non-ASCII native character set
* implemented is EBCDIC, but this may not always be so.
*/
/*************/
/* Globals */
/*************/
#ifdef MACOS
union work {
struct {
short *Prefix_of; /* (8193 * sizeof(short)) */
byte *Suffix_of;
byte *Stack;
} shrink;
byte *Slide;
};
#else
union work {
struct {
short Prefix_of[HSIZE + 2]; /* (8194 * sizeof(short)) */
byte Suffix_of[HSIZE + 2]; /* also s-f length_nodes (smaller) */
byte Stack[HSIZE + 2]; /* also s-f distance_nodes (smaller) */
} shrink;
byte Slide[WSIZE];
};
#endif
extern union work area;
# define prefix_of area.shrink.Prefix_of
# define suffix_of area.shrink.Suffix_of
# define stack area.shrink.Stack
# define slide area.Slide
extern ULONG crc32val;
extern UWORD mask_bits[];
extern int bits_left;
extern ULONG bitbuf;
extern boolean zipeof;
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