unzpriv.h

完整的解压zip文件的源码。包含密码功能

#endif
#if (defined(AOS_VS) || defined(ATARI) || defined(__BEOS__)) /* GRR: others? */
#  ifndef HAVE_UNLINK
#    define HAVE_UNLINK
#  endif
#endif

/* OS-specific exceptions to the "ANSI <--> INT_SPRINTF" rule */

#if (!defined(PCHAR_SPRINTF) && !defined(INT_SPRINTF))
#  if (defined(SYSV) || defined(CONVEX) || defined(NeXT) || defined(BSD4_4))
#    define INT_SPRINTF      /* sprintf() returns int:  SysVish/Posix */
#  endif
#  if (defined(DOS_FLX_OS2_W32) || defined(VMS) || defined(AMIGA))
#    define INT_SPRINTF      /* sprintf() returns int:  ANSI */
#  endif
#  if (defined(ultrix) || defined(__ultrix)) /* Ultrix 4.3 and newer */
#    if (defined(POSIX) || defined(__POSIX))
#      define INT_SPRINTF    /* sprintf() returns int:  ANSI/Posix */
#    endif
#    ifdef __GNUC__
#      define PCHAR_SPRINTF  /* undetermined actual return value */
#    endif
#  endif
#  if (defined(__osf__) || defined(_AIX) || defined(CMS_MVS))
#    define INT_SPRINTF      /* sprintf() returns int:  ANSI/Posix */
#  endif
#  if defined(sun)
#    define PCHAR_SPRINTF    /* sprintf() returns char *:  SunOS cc *and* gcc */
#  endif
#endif

/* defaults that we hope will take care of most machines in the future */

#if (!defined(PCHAR_SPRINTF) && !defined(INT_SPRINTF))
#  ifdef __STDC__
#    define INT_SPRINTF      /* sprintf() returns int:  ANSI */
#  endif
#  ifndef INT_SPRINTF
#    define PCHAR_SPRINTF    /* sprintf() returns char *:  BSDish */
#  endif
#endif

#define MSG_STDERR(f)  (f & 1)        /* bit 0:  0 = stdout, 1 = stderr */
#define MSG_INFO(f)    ((f & 6) == 0) /* bits 1 and 2:  0 = info */
#define MSG_WARN(f)    ((f & 6) == 2) /* bits 1 and 2:  1 = warning */
#define MSG_ERROR(f)   ((f & 6) == 4) /* bits 1 and 2:  2 = error */
#define MSG_FATAL(f)   ((f & 6) == 6) /* bits 1 and 2:  (3 = fatal error) */
#define MSG_ZFN(f)     (f & 0x0008)   /* bit 3:  1 = print zipfile name */
#define MSG_FN(f)      (f & 0x0010)   /* bit 4:  1 = print filename */
#define MSG_LNEWLN(f)  (f & 0x0020)   /* bit 5:  1 = leading newline if !SOL */
#define MSG_TNEWLN(f)  (f & 0x0040)   /* bit 6:  1 = trailing newline if !SOL */
#define MSG_MNEWLN(f)  (f & 0x0080)   /* bit 7:  1 = trailing NL for prompts */
/* the following are subject to change */
#define MSG_NO_WGUI(f) (f & 0x0100)   /* bit 8:  1 = skip if Windows GUI */
#define MSG_NO_AGUI(f) (f & 0x0200)   /* bit 9:  1 = skip if Acorn GUI */
#define MSG_NO_DLL2(f) (f & 0x0400)   /* bit 10:  1 = skip if OS/2 DLL */
#define MSG_NO_NDLL(f) (f & 0x0800)   /* bit 11:  1 = skip if WIN32 DLL */
#define MSG_NO_WDLL(f) (f & 0x1000)   /* bit 12:  1 = skip if Windows DLL */

#if (defined(MORE) && !defined(SCREENLINES))
#  ifdef DOS_FLX_OS2_W32
#    define SCREENLINES 25  /* can be (should be) a function instead */
#  else
#    define SCREENLINES 24  /* VT-100s are assumed to be minimal hardware */
#  endif
#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

#ifndef __16BIT__
#  define nearmalloc  malloc
#  define nearfree    free
#  if (!defined(__IBMC__) || !defined(OS2))
#    ifndef near
#      define near
#    endif
#    ifndef far
#      define far
#    endif
#  endif
#endif

#if (defined(DYNALLOC_CRCTAB) && !defined(DYNAMIC_CRC_TABLE))
#  undef DYNALLOC_CRCTAB
#endif

#if (defined(DYNALLOC_CRCTAB) && defined(REENTRANT))
#  undef DYNALLOC_CRCTAB   /* not safe with reentrant code */
#endif

#if (defined(USE_ZLIB) && !defined(USE_OWN_CRCTAB))
#  ifdef DYNALLOC_CRCTAB
#    undef DYNALLOC_CRCTAB
#  endif
#endif

#if (defined(USE_ZLIB) && defined(ASM_CRC))
#  undef ASM_CRC
#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 OSes:  MS-DOS, OS/2 1.x, etc. */
#  define LoadFarString(x)       fLoadFarString(__G__ (x))
#  define LoadFarStringSmall(x)  fLoadFarStringSmall(__G__ (x))
#  define LoadFarStringSmall2(x) fLoadFarStringSmall2(__G__ (x))
#  if (defined(_MSC_VER) && (_MSC_VER >= 600))
#    define zfstrcpy(dest, src)  _fstrcpy((dest), (src))
#  endif
#  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)
   typedef short  shrint;            /* short/int or "shrink int" (unshrink) */
#else
#  define zfstrcpy(dest, src)       strcpy((dest), (src))
#  ifdef QDOS
#    define LoadFarString(x)        Qstrfix(x)   /* fix up _ for '.' */
#    define LoadFarStringSmall(x)   Qstrfix(x)
#    define LoadFarStringSmall2(x)  Qstrfix(x)
#  else
#    define LoadFarString(x)        x
#    define LoadFarStringSmall(x)   x
#    define LoadFarStringSmall2(x)  x
#  endif
#  ifdef MED_MEM
#    define OUTBUFSIZ 0xFF80         /* can't malloc arrays of 0xFFE8 or more */
#    define TRANSBUFSIZ 0xFF80
     typedef short  shrint;
#  else
#    define OUTBUFSIZ (lenEOL*WSIZE) /* more efficient text conversion */
#    define TRANSBUFSIZ (lenEOL*OUTBUFSIZ)
#    ifdef AMIGA
       typedef short shrint;
#    else
       typedef int  shrint;          /* for efficiency/speed, we hope... */
#    endif
#  endif /* ?MED_MEM */
#  define RAWBUFSIZ OUTBUFSIZ
#endif /* ?SMALL_MEM */

#ifndef Far
#  define Far
#endif

#ifndef MAIN
#  define MAIN  main
#endif

#ifdef SFX      /* disable some unused features for SFX executables */
#  ifndef NO_ZIPINFO
#    define NO_ZIPINFO
#  endif
#  ifdef TIMESTAMP
#    undef TIMESTAMP
#  endif
#endif

/* user may have defined both by accident...  NOTIMESTAMP takes precedence */
#if (defined(TIMESTAMP) && defined(NOTIMESTAMP))
#  undef TIMESTAMP
#endif

#if (!defined(COPYRIGHT_CLEAN) && !defined(USE_SMITH_CODE))
#  define COPYRIGHT_CLEAN
#endif

#if (!defined(LZW_CLEAN) && !defined(USE_UNSHRINK))
#  define LZW_CLEAN
#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"
#endif /* VMS */

#ifdef CMS_MVS
/* Binary files must be RECFM=F,LRECL=1 for ftell() to get correct pos */
/* ...unless byteseek is used.  Let's try that for a while.            */
#  define FOPR "rb,byteseek"
#  define FOPM "r+b,byteseek"
#  define FOPW "wb,recfm=v,lrecl=32760"
#  ifdef MVS
#    define FOPWT "w,lrecl=133"
#  else
#    define FOPWT "w"
#  endif
#endif /* CMS_MVS */

#ifdef TOPS20          /* TOPS-20 MODERN?  You kidding? */
#  define FOPW "w8"
#endif /* TOPS20 */

/* Defaults when nothing special has been defined previously. */
#ifdef MODERN
#  ifndef FOPR
#    define FOPR "rb"
#  endif
#  ifndef FOPM
#    define FOPM "r+b"
#  endif
#  ifndef FOPW
#    define FOPW "wb"
#  endif
#  ifndef FOPWT
#    define FOPWT "wt"
#  endif
#else /* !MODERN */
#  ifndef FOPR
#    define FOPR "r"
#  endif
#  ifndef FOPM
#    define FOPM "r+"
#  endif
#  ifndef FOPW
#    define FOPW "w"
#  endif
#  ifndef FOPWT
#    define FOPWT "w"
#  endif
#endif /* ?MODERN */

/*
 * 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_FLX_OS2
#  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

#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

#ifndef S_TIME_T_MAX            /* max value of signed (>= 32-bit) time_t */
#  define S_TIME_T_MAX  ((time_t)(ulg)0x7fffffffL)
#endif
#ifndef U_TIME_T_MAX            /* max value of unsigned (>= 32-bit) time_t */
#  define U_TIME_T_MAX  ((time_t)(ulg)0xffffffffL)
#endif
#ifdef DOSTIME_MINIMUM          /* min DOSTIME value (1980-01-01) */
#  undef DOSTIME_MINIMUM
#endif
#define DOSTIME_MINIMUM ((ulg)0x00210000L)
#ifdef DOSTIME_2038_01_18       /* approximate DOSTIME equivalent of */
#  undef DOSTIME_2038_01_18     /*  the signed-32-bit time_t limit */
#endif
#define DOSTIME_2038_01_18 ((ulg)0x74320000L)

#ifdef QDOS
#  define ZSUFX         "_zip"
#  define ALT_ZSUFX     ".zip"
#else
#  ifdef RISCOS
#    define ZSUFX       "/zip"
#  else
#    define ZSUFX       ".zip"
#  endif
#  define ALT_ZSUFX     ".ZIP"   /* Unix-only so far (only case-sensitive fs) */
#endif

#define CENTRAL_HDR_SIG   "\001\002"   /* the infamous "PK" signature bytes, */
#define LOCAL_HDR_SIG     "\003\004"   /*  sans "PK" (so unzip executable not */
#define END_CENTRAL_SIG   "\005\006"   /*  mistaken for zipfile itself) */
#define EXTD_LOCAL_SIG    "\007\010"   /* [ASCII "\113" == EBCDIC "\080" ??] */

/* choice of activities for do_string() */
#define SKIP              0             /* skip header block */
#define DISPLAY           1             /* display archive comment (ASCII) */
#define DISPL_8           5             /* display file comment (ext. ASCII) */
#define DS_FN             2             /* read filename (ext. ASCII) */
#define EXTRA_FIELD       3             /* copy extra field into buffer */
#define DS_EF             3
#ifdef AMIGA
#  define FILENOTE        4
#endif

#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!! */