unzpriv.h

zip压缩

#ifdef SET_DIR_ATTRIB
   typedef struct dirtime {  /* temporary struct for holding directory info */
       struct dirtime *next; /*  until can be sorted and set at end */
       char *fn;             /* filename of directory */
       union {
           iztimes t3;       /* mtime, atime, ctime */
           ztimbuf t2;       /* modtime, actime */
       } u;
       unsigned perms;       /* same as min_info.file_attr */
       int have_uidgid;      /* flag */
       ush uidgid[2];
   } dirtime;
#endif /* SET_DIR_ATTRIB */

typedef struct min_info {
    long offset;
    ulg crc;                 /* crc (needed if extended header) */
    ulg compr_size;          /* compressed size (needed if extended header) */
    ulg uncompr_size;        /* uncompressed size (needed if extended header) */
    ush diskstart;           /* no of volume where this entry starts */
    uch hostver;
    uch hostnum;
    unsigned file_attr;      /* local flavor, as used by creat(), chmod()... */
    unsigned encrypted : 1;  /* file encrypted: decrypt before uncompressing */
    unsigned ExtLocHdr : 1;  /* use time instead of CRC for decrypt check */
    unsigned textfile : 1;   /* file is text (according to zip) */
    unsigned textmode : 1;   /* file is to be extracted as text */
    unsigned lcflag : 1;     /* convert filename to lowercase */
    unsigned vollabel : 1;   /* "file" is an MS-DOS volume (disk) label */
    unsigned HasUxAtt : 1;   /* crec ext_file_attr has Unix style mode bits */
} min_info;

typedef struct VMStimbuf {
    char *revdate;    /* (both roughly correspond to Unix modtime/st_mtime) */
    char *credate;
} VMStimbuf;

/*---------------------------------------------------------------------------
    Zipfile work area declarations.
  ---------------------------------------------------------------------------*/

#ifdef MALLOC_WORK
   union work {
     struct {                 /* unshrink(): */
       shrint *Parent;          /* pointer to (8192 * sizeof(shrint)) */
       uch *value;              /* pointer to 8KB char buffer */
       uch *Stack;              /* pointer to another 8KB char buffer */
     } shrink;
     uch *Slide;              /* explode(), inflate(), unreduce() */
   };
#else /* !MALLOC_WORK */
   union work {
     struct {                 /* unshrink(): */
       shrint Parent[HSIZE];    /* (8192 * sizeof(shrint)) == 16KB minimum */
       uch value[HSIZE];        /* 8KB */
       uch Stack[HSIZE];        /* 8KB */
     } shrink;                  /* total = 32KB minimum; 80KB on Cray/Alpha */
     uch Slide[WSIZE];        /* explode(), inflate(), unreduce() */
   };
#endif /* ?MALLOC_WORK */

#define slide  G.area.Slide

#if (defined(DLL) && !defined(NO_SLIDE_REDIR))
#  define redirSlide G.redirect_sldptr
#else
#  define redirSlide G.area.Slide
#endif

/*---------------------------------------------------------------------------
    Zipfile layout declarations.  If these headers ever change, make sure the
    xxREC_SIZE defines (above) change with them!
  ---------------------------------------------------------------------------*/

   typedef uch   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_DOS_DATETIME           6
#      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 uch   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_DOS_DATETIME           8
#      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 uch   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 */
       uch version_needed_to_extract[2];
       ush general_purpose_bit_flag;
       ush compression_method;
       ulg last_mod_dos_datetime;
       ulg crc32;
       ulg csize;
       ulg ucsize;
       ush filename_length;
       ush extra_field_length;
   } local_file_hdr;

#if 0
   typedef struct central_directory_file_header {     /* CENTRAL */
       uch version_made_by[2];
       uch version_needed_to_extract[2];
       ush general_purpose_bit_flag;
       ush compression_method;
       ulg last_mod_dos_datetime;
       ulg crc32;
       ulg csize;
       ulg ucsize;
       ush filename_length;
       ush extra_field_length;
       ush file_comment_length;
       ush disk_number_start;
       ush internal_file_attributes;
       ulg external_file_attributes;
       ulg relative_offset_local_header;
   } cdir_file_hdr;
#endif /* 0 */

   typedef struct end_central_dir_record {            /* END CENTRAL */
       ush number_this_disk;
       ush num_disk_start_cdir;
       ush num_entries_centrl_dir_ths_disk;
       ush total_entries_central_dir;
       ulg size_central_directory;
       ulg offset_start_central_directory;
       ush zipfile_comment_length;
   } ecdir_rec;


/* Huffman code lookup table entry--this entry is four bytes for machines
   that have 16-bit pointers (e.g. PC's in the small or medium model).
   Valid extra bits are 0..16.  e == 31 is EOB (end of block), e == 32
   means that v is a literal, 32 < e < 64 means that v is a pointer to
   the next table, which codes (e & 31)  bits, and lastly e == 99 indicates
   an unused code.  If a code with e == 99 is looked up, this implies an
   error in the data. */

struct huft {
    uch e;                /* number of extra bits or operation */
    uch b;                /* number of bits in this code or subcode */
    union {
        ush n;            /* literal, length base, or distance base */
        struct huft *t;   /* pointer to next level of table */
    } v;
};


typedef struct _APIDocStruct {
    char *compare;
    char *function;
    char *syntax;
    char *purpose;
} APIDocStruct;




/*************/
/*  Globals  */
/*************/

#if (defined(OS2) && !defined(FUNZIP))
#  include "os2/os2data.h"
#endif

#include "globals.h"



/*************************/
/*  Function Prototypes  */
/*************************/

/*---------------------------------------------------------------------------
    Functions in unzip.c (initialization routines):
  ---------------------------------------------------------------------------*/

#ifndef WINDLL
   int    MAIN                   OF((int argc, char **argv));
   int    unzip                  OF((__GPRO__ int argc, char **argv));
   int    uz_opts                OF((__GPRO__ int *pargc, char ***pargv));
   int    usage                  OF((__GPRO__ int error));
#endif /* !WINDLL */

/*---------------------------------------------------------------------------
    Functions in process.c (main driver routines):
  ---------------------------------------------------------------------------*/

int      process_zipfiles        OF((__GPRO));
void     free_G_buffers          OF((__GPRO));
/* static int    do_seekable     OF((__GPRO__ int lastchance)); */
/* static int    find_ecrec      OF((__GPRO__ long searchlen)); */
int      uz_end_central          OF((__GPRO));
int      process_cdir_file_hdr   OF((__GPRO));
int      get_cdir_ent            OF((__GPRO));
int      process_local_file_hdr  OF((__GPRO));
unsigned ef_scan_for_izux        OF((ZCONST uch *ef_buf, unsigned ef_len,
                                     int ef_is_c, ulg dos_mdatetime,
                                     iztimes *z_utim, ush *z_uidgid));
#if (defined(RISCOS) || defined(ACORN_FTYPE_NFS))
   zvoid *getRISCOSexfield       OF((ZCONST uch *ef_buf, unsigned ef_len));
#endif

#ifndef SFX

/*---------------------------------------------------------------------------
    Functions in zipinfo.c (`zipinfo-style' listing routines):
  ---------------------------------------------------------------------------*/

#ifndef NO_ZIPINFO
#ifndef WINDLL
   int   zi_opts                 OF((__GPRO__ int *pargc, char ***pargv));
#endif
int      zi_end_central          OF((__GPRO));
int      zipinfo                 OF((__GPRO));
/* static int      zi_long       OF((__GPRO__ ulg *pEndprev)); */
/* static int      zi_short      OF((__GPRO)); */
/* static char    *zi_time       OF((__GPRO__ ZCONST ulg *datetimez,
                                     ZCONST time_t *modtimez, char *d_t_str));*/
#endif /* !NO_ZIPINFO */

/*---------------------------------------------------------------------------
    Functions in list.c (generic zipfile-listing routines):
  ---------------------------------------------------------------------------*/

int      list_files              OF((__GPRO));
#ifdef TIMESTAMP
   int   get_time_stamp          OF((__GPRO__  time_t *last_modtime,
                                     ulg *nmember));
#endif
int      ratio                   OF((ulg uc, ulg c));
void     fnprint                 OF((__GPRO));

#endif /* !SFX */

/*---------------------------------------------------------------------------
    Functions in fileio.c:
  ---------------------------------------------------------------------------*/

int      open_input_file      OF((__GPRO));
int      open_outfile         OF((__GPRO));                    /* also vms.c */
void     undefer_input        OF((__GPRO));
void     defer_leftover_input OF((__GPRO));
unsigned readbuf              OF((__GPRO__ char *buf, register unsigned len));
int      readbyte             OF((__GPRO));
int      fillinbuf            OF((__GPRO));
int      seek_zipf            OF((__GPRO__ LONGINT abs_offset));
#ifdef FUNZIP
   int   flush                OF((__GPRO__ ulg size));  /* actually funzip.c */
#else
   int   flush                OF((__GPRO__ uch *buf, ulg size, int unshrink));
#endif
/* static int  disk_error     OF((__GPRO)); */
void     handler              OF((int signal));
time_t   dos_to_unix_time     OF((ulg dos_datetime));
int      check_for_newer      OF((__GPRO__ char *filename)); /* os2,vmcms,vms */
int      do_string            OF((__GPRO__ unsigned int length, int option));
ush      makeword             OF((ZCONST uch *b));
ulg      makelong             OF((ZCONST uch *sig));
#if (!defined(STR_TO_ISO) || defined(NEED_STR2ISO))
   char *str2iso              OF((char *dst, ZCONST char *src));
#endif
#if (!defined(STR_TO_OEM) || defined(NEED_STR2OEM))
   char *str2oem              OF((char *dst, ZCONST char *src));
#endif
#ifdef NO_STRNICMP
   int   zstrnicmp            OF((register ZCONST char *s1,
                                  register ZCONST char *s2,
                                  register unsigned n));
#endif
#ifdef REGULUS
   int   zstat                OF((ZCONST char *p, struct stat *s));
#endif
#ifdef ZMEM   /* MUST be ifdef'd because of conflicts with the standard def. */
   zvoid *memset OF((register zvoid *, register int, register unsigned int));
   int    memcmp OF((register ZCONST zvoid*, register ZCONST zvoid *,
                     register unsigned int));
   zvoid *memcpy OF((register zvoid *, register ZCONST zvoid *,
                     register unsigned int));
#endif
#ifdef NEED_UZMBSCHR
   unsigned char *uzmbschr  OF((ZCONST unsigned char *str, unsigned int c));
#endif
#ifdef NEED_UZMBSRCHR
   unsigned char *uzmbsrchr OF((ZCONST unsigned char *str, unsigned int c));
#endif
#ifdef SMALL_MEM
   char *fLoadFarString       OF((__GPRO__ const char Far *sz));
   char *fLoadFarStringSmall  OF((__GPRO__ const char Far *sz));
   char *fLoadFarStringSmall2 OF((__GPRO__ const char Far *sz));
   #ifndef zfstrcpy
     char Far * Far zfstrcpy  OF((char Far *s1, const char Far *s2));
   #endif
#endif


/*---------------------------------------------------------------------------
    Functions in extract.c:
  ---------------------------------------------------------------------------*/

int    extract_or_test_files     OF((__GPRO));
/* static int   store_info          OF((void)); */
/* static int   extract_or_test_member   OF((__GPRO)); */
/* static int   TestExtraField   OF((__GPRO__ uch *ef, unsigned ef_len)); */
/* static int   test_OS2         OF((__GPRO__ uch *eb, unsigned eb_size)); */
/* static int   test_NT          OF((__GPRO__ uch *eb, unsigned eb_size)); */
int    memextract                OF((__GPRO__ uch *tgt, ulg tgtsize,
                                     ZCONST uch *src, ulg srcsize));
int    memflush                  OF((__GPRO__ ZCONST uch *rawbuf, ulg size));
#if (defined(VMS) || defined(VMS_TEXT_CONV))
   uch   *extract_izvms_block    OF((__GPRO__ ZCONST uch *ebdata,
                                     unsigned size, unsigned *retlen,
                                     ZCONST uch *init, unsigned needlen));
#endif
char  *fnfilter                  OF((ZCONST char *raw, uch *space));

/*---------------------------------------------------------------------------
    Decompression functions:
  ---------------------------------------------------------------------------*/

#if (!defined(SFX) && !defined(FUNZIP))
int    explode                   OF((__GPRO));                  /* explode.c */
#endif
int    huft_free                 OF((struct huft *t));          /* inflate.c */
int    huft_build                OF((__GPRO__ ZCONST unsigned *b, unsigned n,
                                     unsigned s, ZCONST ush *d, ZCONST uch *e,
                                     struct huft **t, int *m));
#ifdef USE_ZLIB
   int    UZinflate              OF((__GPRO__ int is_defl64));  /* inflate.c */
#  define inflate_free(x)        inflateEnd(&((Uz_Globs *)(&G))->dstrm)
#else
   int    inflate                OF((__GPRO__ int is_defl64));  /* inflate.c */
   int    inflate_free           OF((__GPRO));                  /* inflate.c */
#endif /* ?USE_ZLIB */
#if (!defined(SFX) && !defined(FUNZIP))
#ifndef COPYRIGHT_CLEAN
   int    unreduce               OF((__GPRO));                 /* unreduce.c */
/* static void  LoadFollowers    OF((__GPRO__ f_array *follower, uch *Slen));
                                                                * unreduce.c */
#endif /* !COPYRIGHT_CLEAN */