unzip.h

另一个解zip文件的程序

#define UNZIP_VERSION     20   /* compatible with PKUNZIP 2.0 */
#define VMS_UNZIP_VERSION 42   /* if OS-needed-to-extract is VMS:  can do */

#if defined(MSDOS) || defined(NT) || defined(OS2)
#  define DOS_NT_OS2
#endif

#if defined(MSDOS) || defined(OS2)
#  define DOS_OS2
#endif

#if defined(MSDOS) || defined(OS2) || defined(ATARI_ST)
#  define DOS_OS2_TOS
#endif

#if defined(MSDOS) || defined(ATARI_ST)
#  define DOS_TOS
#endif

#if defined(MSDOS) || defined(TOPS20) || defined(VMS)
#  define DOS_T20_VMS
#endif

#if defined(TOPS20) || defined(VMS)
#  define T20_VMS
#endif

/* clean up with a few defaults */
#ifndef DIR_END
#  define DIR_END '/'       /* last char before program name (or filename) */
#endif
#ifndef RETURN
#  define RETURN  return    /* only used in main() */
#endif
#ifndef PRINTF
#  define PRINTF  printf
#endif
#ifndef FPRINTF
#  define FPRINTF fprintf
#endif
#ifndef PUTC
#  define PUTC    putc      /* putchar() not used: use PUTC(c,stdout) instead */
#endif

#define DIR_BLKSIZ  64      /* number of directory entries per block
                             *  (should fit in 4096 bytes, usually) */
#ifndef WSIZE
#  define WSIZE     0x8000  /* window size--must be a power of two, and */
#endif                      /*  at least 32K for zip's deflate method */

#ifndef INBUFSIZ
#  if (defined(MED_MEM) || defined(SMALL_MEM))
#    define INBUFSIZ  2048  /* works for MS-DOS small model */
#  else
#    define INBUFSIZ  8192  /* larger buffers for real OSes */
#  endif
#endif

/* GRR:  NT defines MSDOS?? */
#if (!defined(MSDOS) && !defined(__IBMC__)) || defined(NT)
#  define near
#  define far
#endif
#if defined(__GO32__) || defined(__EMX__)
#  define near
#  define far
#endif

/* Logic for case of small memory, length of EOL > 1:  if OUTBUFSIZ == 2048,
 * OUTBUFSIZ>>1 == 1024 and OUTBUFSIZ>>7 == 16; therefore rawbuf is 1008 bytes
 * and transbuf 1040 bytes.  Have room for 32 extra EOL chars; 1008/32 == 31.5
 * chars/line, smaller than estimated 35-70 characters per line for C source
 * and normal text.  Hence difference is sufficient for most "average" files.
 * (Argument scales for larger OUTBUFSIZ.)
 */
#ifdef SMALL_MEM          /* i.e., 16-bit OS's:  MS-DOS, OS/2 1.x, etc. */
#  ifndef Far
#    define Far far  /* __far only works for MSC 6.00, not 6.0a or Borland */
#  endif
#  define OUTBUFSIZ INBUFSIZ
#  if (lenEOL == 1)
#    define RAWBUFSIZ (OUTBUFSIZ>>1)
#  else
#    define RAWBUFSIZ ((OUTBUFSIZ>>1) - (OUTBUFSIZ>>7))
#  endif
#  define TRANSBUFSIZ (OUTBUFSIZ-RAWBUFSIZ)
#else
#  define LoadFarString(x)       x
#  define LoadFarStringSmall(x)  x
#  define LoadFarStringSmall2(x) x
#  ifdef MED_MEM
#    define OUTBUFSIZ 0xFF80     /* can't malloc arrays of 0xFFE8 or more */
#    define TRANSBUFSIZ 0xFF80
#  else
#    define OUTBUFSIZ (lenEOL*WSIZE)  /* more efficient text conversion */
#    define TRANSBUFSIZ (lenEOL*OUTBUFSIZ)
#    define NEW_UNSHRINK
#  endif
#  define RAWBUFSIZ OUTBUFSIZ
#endif /* ?SMALL_MEM */

#ifndef Far
#  define Far   /* GRR:  should combine this with near/far above */
#endif

#ifndef MAIN
#  define MAIN  main
#endif

#if (defined(SFX) && !defined(NO_ZIPINFO))
#  define NO_ZIPINFO
#endif

#ifndef O_BINARY
#  define O_BINARY  0
#endif

#ifndef PIPE_ERROR
#  define PIPE_ERROR (errno == EPIPE)
#endif

/* File operations--use "b" for binary if allowed or fixed length 512 on VMS */
#ifdef VMS
#  define FOPR  "r","ctx=stm"
#  define FOPM  "r+","ctx=stm","rfm=fix","mrs=512"
#  define FOPW  "w","ctx=stm","rfm=fix","mrs=512"
#else /* !VMS */
#  if defined(MODERN) || defined(AMIGA)
#    define FOPR "rb"
#    define FOPM "r+b"
#    ifdef TOPS20          /* TOPS-20 MODERN?  You kidding? */
#      define FOPW "w8"
#    else
#      define FOPW "wb"
#    endif
#  else /* !MODERN */
#    define FOPR "r"
#    define FOPM "r+"
#    define FOPW "w"
#  endif /* ?MODERN */
#endif /* VMS */

/*
 * 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_TOS
#  include <limits.h>
#endif

#ifndef PATH_MAX
#  ifdef MAXPATHLEN
#    define PATH_MAX      MAXPATHLEN    /* in <sys/param.h> on some systems */
#  else
#    ifdef _MAX_PATH
#      define PATH_MAX    _MAX_PATH
#    else
#      if FILENAME_MAX > 255
#        define PATH_MAX  FILENAME_MAX  /* used like PATH_MAX on some systems */
#      else
#        define PATH_MAX  1024
#      endif
#    endif /* ?_MAX_PATH */
#  endif /* ?MAXPATHLEN */
#endif /* !PATH_MAX */

#define FILNAMSIZ  (PATH_MAX+1)

#ifdef SHORT_SYMS                   /* Mark Williams C, ...? */
#  define extract_or_test_files     xtr_or_tst_files
#  define extract_or_test_member    xtr_or_tst_member
#endif

#ifdef REALLY_SHORT_SYMS            /* TOPS-20 linker:  first 6 chars */
#  define process_cdir_file_hdr     XXpcdfh
#  define process_local_file_hdr    XXplfh
#  define extract_or_test_files     XXxotf  /* necessary? */
#  define extract_or_test_member    XXxotm  /* necessary? */
#  define check_for_newer           XXcfn
#  define overwrite_all             XXoa
#  define process_all_files         XXpaf
#  define extra_field               XXef
#  define explode_lit8              XXel8
#  define explode_lit4              XXel4
#  define explode_nolit8            XXnl8
#  define explode_nolit4            XXnl4
#  define cpdist8                   XXcpdist8
#  define inflate_codes             XXic
#  define inflate_stored            XXis
#  define inflate_fixed             XXif
#  define inflate_dynamic           XXid
#  define inflate_block             XXib
#  define maxcodemax                XXmax
#endif

#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 ROOT              0    /* checkdir() extract-to path:  called once */
#define INIT              1    /* allocate buildpath:  called once per member */
#define APPEND_DIR        2    /* append a dir comp.:  many times per member */
#define APPEND_NAME       3    /* append actual filename:  once per member */
#define GETPATH           4    /* retrieve the complete path and free it */
#define END               5    /* free root path prior to exiting program */

/* version_made_by codes (central dir):  make sure these */
/*  are not defined on their respective systems!! */
#define FS_FAT_           0    /* filesystem used by MS-DOS, OS/2, NT */
#define AMIGA_            1
#define VMS_              2
#define UNIX_             3
#define VM_CMS_           4
#define ATARI_            5    /* what if it's a minix filesystem? [cjh] */
#define FS_HPFS_          6    /* filesystem used by OS/2, NT */
#define MAC_              7
#define Z_SYSTEM_         8
#define CPM_              9
#define TOPS20_           10
#define FS_NTFS_          11   /* filesystem used by Windows NT */
#define QDOS_MAYBE_       12   /* a bit premature, but somebody once started */
#define ACORN_            13   /* Archimedes Acorn RISCOS */
#define NUM_HOSTS         14   /* 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 PK_OK             0    /* no error */
#define PK_COOL           0    /* no error */
#define PK_GNARLY         0    /* no error */
#define PK_WARN           1    /* warning error */
#define PK_ERR            2    /* error in zipfile */
#define PK_BADERR         3    /* severe error in zipfile */
#define PK_MEM            4    /* insufficient memory */
#define PK_MEM2           5    /* insufficient memory */
#define PK_MEM3           6    /* insufficient memory */
#define PK_MEM4           7    /* insufficient memory */
#define PK_MEM5           8    /* insufficient memory */
#define PK_NOZIP          9    /* zipfile not found */
#define PK_PARAM          10   /* bad or illegal parameters specified */
#define PK_FIND           11   /* no files found */
#define PK_DISK           50   /* disk full */
#define PK_EOF            51   /* unexpected EOF */

#define IZ_DIR            76   /* potential zipfile is a directory */
#define IZ_CREATED_DIR    77   /* directory created: set time and permissions */
#define IZ_VOL_LABEL      78   /* volume label, but can't set on hard disk */

#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) */

/*---------------------------------------------------------------------------
    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 old 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 native(c)   ebcdic[(c)]
#  define NATIVE      "EBCDIC"
#endif

#ifdef MPW
#  define FFLUSH(f)   PUTC('\n',f)
#else
#  define FFLUSH      fflush
#endif

#ifdef ZMEM     /* GRR:  THIS IS AN EXPERIMENT... (seems to work) */
#  undef ZMEM
#  define memcpy(dest,src,len)   bcopy(src,dest,len)
#  define memzero                bzero
#else
#  define memzero(dest,len)      memset(dest,0,len)
#endif

#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 */
#define ENV_UNZIP2      "UNZIPOPT"        /* alternate name for zip compat. */
#define ENV_ZIPINFO2    "ZIPINFOOPT"

#if !defined(QQ) && !defined(NOQQ)
#  define QQ
#endif

#ifdef QQ                         /* Newtware version:  no file */
#  define QCOND     (!qflag)      /*  comments with -vq or -vqq */
#else                             /* Bill Davidsen version:  no way to */
#  define QCOND     (which_hdr)   /*  kill file comments when listing */
#endif

#ifdef OLD_QQ
#  define QCOND2    (qflag < 2)
#else
#  define QCOND2    (!qflag)
#endif

#ifndef TRUE
#  define TRUE      1   /* sort of obvious */
#endif
#ifndef FALSE
#  define FALSE     0
#endif

#ifndef SEEK_SET
#  define SEEK_SET  0
#  define SEEK_CUR  1
#  define SEEK_END  2
#endif

#if (defined(UNIX) && defined(S_IFLNK) && !defined(MTS))
#  define SYMLINKS
#  ifndef S_ISLNK
#    define S_ISLNK(m)  (((m) & S_IFMT) == S_IFLNK)
#  endif
#endif /* UNIX && S_IFLNK && !MTS */

#ifndef S_ISDIR
#  define S_ISDIR(m)  (((m) & S_IFMT) == S_IFDIR)
#endif

#ifndef IS_VOLID
#  define IS_VOLID(m)  ((m) & 0x08)
#endif