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
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