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Annotation of embedaddon/sudo/zlib/gzguts.h, revision 1.1

1.1     ! misho       1: /* gzguts.h -- zlib internal header definitions for gz* operations
        !             2:  * Copyright (C) 2004, 2005, 2010 Mark Adler
        !             3:  * For conditions of distribution and use, see copyright notice in zlib.h
        !             4:  */
        !             5: 
        !             6: #ifdef _LARGEFILE64_SOURCE
        !             7: #  ifndef _LARGEFILE_SOURCE
        !             8: #    define _LARGEFILE_SOURCE 1
        !             9: #  endif
        !            10: #  ifdef _FILE_OFFSET_BITS
        !            11: #    undef _FILE_OFFSET_BITS
        !            12: #  endif
        !            13: #endif
        !            14: 
        !            15: #if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ)
        !            16: #  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
        !            17: #else
        !            18: #  define ZLIB_INTERNAL
        !            19: #endif
        !            20: 
        !            21: #include "zlib.h"
        !            22: #include <stdio.h>
        !            23: #ifdef STDC
        !            24: #  include <string.h>
        !            25: #  include <stdlib.h>
        !            26: #  include <limits.h>
        !            27: #endif
        !            28: #include <fcntl.h>
        !            29: 
        !            30: #ifdef NO_DEFLATE       /* for compatibility with old definition */
        !            31: #  define NO_GZCOMPRESS
        !            32: #endif
        !            33: 
        !            34: #ifdef _MSC_VER
        !            35: #  include <io.h>
        !            36: #  define vsnprintf _vsnprintf
        !            37: #endif
        !            38: 
        !            39: #ifndef local
        !            40: #  define local static
        !            41: #endif
        !            42: /* compile with -Dlocal if your debugger can't find static symbols */
        !            43: 
        !            44: /* gz* functions always use library allocation functions */
        !            45: #ifndef STDC
        !            46:   extern voidp  malloc OF((uInt size));
        !            47:   extern void   free   OF((voidpf ptr));
        !            48: #endif
        !            49: 
        !            50: /* get errno and strerror definition */
        !            51: #if defined UNDER_CE
        !            52: #  include <windows.h>
        !            53: #  define zstrerror() gz_strwinerror((DWORD)GetLastError())
        !            54: #else
        !            55: #  ifdef STDC
        !            56: #    include <errno.h>
        !            57: #    define zstrerror() strerror(errno)
        !            58: #  else
        !            59: #    define zstrerror() "stdio error (consult errno)"
        !            60: #  endif
        !            61: #endif
        !            62: 
        !            63: /* provide prototypes for these when building zlib without LFS */
        !            64: #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
        !            65:     ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
        !            66:     ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
        !            67:     ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
        !            68:     ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
        !            69: #endif
        !            70: 
        !            71: /* default i/o buffer size -- double this for output when reading */
        !            72: #define GZBUFSIZE 8192
        !            73: 
        !            74: /* gzip modes, also provide a little integrity check on the passed structure */
        !            75: #define GZ_NONE 0
        !            76: #define GZ_READ 7247
        !            77: #define GZ_WRITE 31153
        !            78: #define GZ_APPEND 1     /* mode set to GZ_WRITE after the file is opened */
        !            79: 
        !            80: /* values for gz_state how */
        !            81: #define LOOK 0      /* look for a gzip header */
        !            82: #define COPY 1      /* copy input directly */
        !            83: #define GZIP 2      /* decompress a gzip stream */
        !            84: 
        !            85: /* internal gzip file state data structure */
        !            86: typedef struct {
        !            87:         /* used for both reading and writing */
        !            88:     int mode;               /* see gzip modes above */
        !            89:     int fd;                 /* file descriptor */
        !            90:     char *path;             /* path or fd for error messages */
        !            91:     z_off64_t pos;          /* current position in uncompressed data */
        !            92:     unsigned size;          /* buffer size, zero if not allocated yet */
        !            93:     unsigned want;          /* requested buffer size, default is GZBUFSIZE */
        !            94:     unsigned char *in;      /* input buffer */
        !            95:     unsigned char *out;     /* output buffer (double-sized when reading) */
        !            96:     unsigned char *next;    /* next output data to deliver or write */
        !            97:         /* just for reading */
        !            98:     unsigned have;          /* amount of output data unused at next */
        !            99:     int eof;                /* true if end of input file reached */
        !           100:     z_off64_t start;        /* where the gzip data started, for rewinding */
        !           101:     z_off64_t raw;          /* where the raw data started, for seeking */
        !           102:     int how;                /* 0: get header, 1: copy, 2: decompress */
        !           103:     int direct;             /* true if last read direct, false if gzip */
        !           104:         /* just for writing */
        !           105:     int level;              /* compression level */
        !           106:     int strategy;           /* compression strategy */
        !           107:         /* seek request */
        !           108:     z_off64_t skip;         /* amount to skip (already rewound if backwards) */
        !           109:     int seek;               /* true if seek request pending */
        !           110:         /* error information */
        !           111:     int err;                /* error code */
        !           112:     char *msg;              /* error message */
        !           113:         /* zlib inflate or deflate stream */
        !           114:     z_stream strm;          /* stream structure in-place (not a pointer) */
        !           115: } gz_state;
        !           116: typedef gz_state FAR *gz_statep;
        !           117: 
        !           118: /* shared functions */
        !           119: void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
        !           120: #if defined UNDER_CE
        !           121: char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
        !           122: #endif
        !           123: 
        !           124: /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
        !           125:    value -- needed when comparing unsigned to z_off64_t, which is signed
        !           126:    (possible z_off64_t types off_t, off64_t, and long are all signed) */
        !           127: #ifdef INT_MAX
        !           128: #  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
        !           129: #else
        !           130: unsigned ZLIB_INTERNAL gz_intmax OF((void));
        !           131: #  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
        !           132: #endif