Annotation of embedaddon/sudo/zlib/gzguts.h, revision 1.1.1.2
1.1 misho 1: /* gzguts.h -- zlib internal header definitions for gz* operations
1.1.1.2 ! misho 2: * Copyright (C) 2004, 2005, 2010, 2011, 2012 Mark Adler
1.1 misho 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:
1.1.1.2 ! misho 30: #ifdef __TURBOC__
! 31: # include <io.h>
! 32: #endif
! 33:
1.1 misho 34: #ifdef NO_DEFLATE /* for compatibility with old definition */
35: # define NO_GZCOMPRESS
36: #endif
37:
1.1.1.2 ! misho 38: #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
! 39: # ifndef HAVE_VSNPRINTF
! 40: # define HAVE_VSNPRINTF
! 41: # endif
! 42: #endif
! 43:
! 44: #if defined(__CYGWIN__)
! 45: # ifndef HAVE_VSNPRINTF
! 46: # define HAVE_VSNPRINTF
! 47: # endif
! 48: #endif
! 49:
! 50: #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
! 51: # ifndef HAVE_VSNPRINTF
! 52: # define HAVE_VSNPRINTF
! 53: # endif
! 54: #endif
! 55:
! 56: #ifndef HAVE_VSNPRINTF
! 57: # ifdef MSDOS
! 58: /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
! 59: but for now we just assume it doesn't. */
! 60: # define NO_vsnprintf
! 61: # endif
! 62: # ifdef __TURBOC__
! 63: # define NO_vsnprintf
! 64: # endif
! 65: # ifdef WIN32
! 66: /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
! 67: # if !defined(vsnprintf) && !defined(NO_vsnprintf)
! 68: # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
! 69: # include <io.h>
! 70: # define vsnprintf _vsnprintf
! 71: # endif
! 72: # endif
! 73: # endif
! 74: # ifdef __SASC
! 75: # define NO_vsnprintf
! 76: # endif
! 77: # ifdef VMS
! 78: # define NO_vsnprintf
! 79: # endif
! 80: # ifdef __OS400__
! 81: # define NO_vsnprintf
! 82: # endif
! 83: # ifdef __MVS__
! 84: # define NO_vsnprintf
! 85: # endif
1.1 misho 86: #endif
87:
88: #ifndef local
89: # define local static
90: #endif
91: /* compile with -Dlocal if your debugger can't find static symbols */
92:
93: /* gz* functions always use library allocation functions */
94: #ifndef STDC
95: extern voidp malloc OF((uInt size));
96: extern void free OF((voidpf ptr));
97: #endif
98:
99: /* get errno and strerror definition */
100: #if defined UNDER_CE
101: # include <windows.h>
102: # define zstrerror() gz_strwinerror((DWORD)GetLastError())
103: #else
104: # ifdef STDC
105: # include <errno.h>
106: # define zstrerror() strerror(errno)
107: # else
108: # define zstrerror() "stdio error (consult errno)"
109: # endif
110: #endif
111:
112: /* provide prototypes for these when building zlib without LFS */
113: #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
114: ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
115: ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
116: ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
117: ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
118: #endif
119:
1.1.1.2 ! misho 120: /* default memLevel */
! 121: #if MAX_MEM_LEVEL >= 8
! 122: # define DEF_MEM_LEVEL 8
! 123: #else
! 124: # define DEF_MEM_LEVEL MAX_MEM_LEVEL
! 125: #endif
! 126:
1.1 misho 127: /* default i/o buffer size -- double this for output when reading */
128: #define GZBUFSIZE 8192
129:
130: /* gzip modes, also provide a little integrity check on the passed structure */
131: #define GZ_NONE 0
132: #define GZ_READ 7247
133: #define GZ_WRITE 31153
134: #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */
135:
136: /* values for gz_state how */
137: #define LOOK 0 /* look for a gzip header */
138: #define COPY 1 /* copy input directly */
139: #define GZIP 2 /* decompress a gzip stream */
140:
141: /* internal gzip file state data structure */
142: typedef struct {
1.1.1.2 ! misho 143: /* exposed contents for gzgetc() macro */
! 144: struct gzFile_s x; /* "x" for exposed */
! 145: /* x.have: number of bytes available at x.next */
! 146: /* x.next: next output data to deliver or write */
! 147: /* x.pos: current position in uncompressed data */
1.1 misho 148: /* used for both reading and writing */
149: int mode; /* see gzip modes above */
150: int fd; /* file descriptor */
151: char *path; /* path or fd for error messages */
152: unsigned size; /* buffer size, zero if not allocated yet */
153: unsigned want; /* requested buffer size, default is GZBUFSIZE */
154: unsigned char *in; /* input buffer */
155: unsigned char *out; /* output buffer (double-sized when reading) */
1.1.1.2 ! misho 156: int direct; /* 0 if processing gzip, 1 if transparent */
1.1 misho 157: /* just for reading */
158: int how; /* 0: get header, 1: copy, 2: decompress */
1.1.1.2 ! misho 159: z_off64_t start; /* where the gzip data started, for rewinding */
! 160: int eof; /* true if end of input file reached */
! 161: int past; /* true if read requested past end */
1.1 misho 162: /* just for writing */
163: int level; /* compression level */
164: int strategy; /* compression strategy */
165: /* seek request */
166: z_off64_t skip; /* amount to skip (already rewound if backwards) */
167: int seek; /* true if seek request pending */
168: /* error information */
169: int err; /* error code */
170: char *msg; /* error message */
171: /* zlib inflate or deflate stream */
172: z_stream strm; /* stream structure in-place (not a pointer) */
173: } gz_state;
174: typedef gz_state FAR *gz_statep;
175:
176: /* shared functions */
177: void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
178: #if defined UNDER_CE
179: char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
180: #endif
181:
182: /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
183: value -- needed when comparing unsigned to z_off64_t, which is signed
184: (possible z_off64_t types off_t, off64_t, and long are all signed) */
185: #ifdef INT_MAX
186: # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
187: #else
188: unsigned ZLIB_INTERNAL gz_intmax OF((void));
189: # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
190: #endif
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