| /* gzguts.h -- zlib internal header definitions for gz* operations |
| * Copyright (C) 2004, 2005, 2010, 2011, 2012 Mark Adler |
| * For conditions of distribution and use, see copyright notice in zlib.h |
| */ |
| |
| #ifdef _LARGEFILE64_SOURCE |
| # ifndef _LARGEFILE_SOURCE |
| # define _LARGEFILE_SOURCE 1 |
| # endif |
| # ifdef _FILE_OFFSET_BITS |
| # undef _FILE_OFFSET_BITS |
| # endif |
| #endif |
| |
| #ifdef HAVE_HIDDEN |
| # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) |
| #else |
| # define ZLIB_INTERNAL |
| #endif |
| |
| #include <stdio.h> |
| #include "zlib.h" |
| #ifdef STDC |
| # include <string.h> |
| # include <stdlib.h> |
| # include <limits.h> |
| #endif |
| #include <fcntl.h> |
| |
| #ifdef _WIN32 |
| # include <stddef.h> |
| #endif |
| |
| #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32) |
| # include <io.h> |
| #endif |
| |
| #ifdef NO_DEFLATE /* for compatibility with old definition */ |
| # define NO_GZCOMPRESS |
| #endif |
| |
| #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) |
| # ifndef HAVE_VSNPRINTF |
| # define HAVE_VSNPRINTF |
| # endif |
| #endif |
| |
| #if defined(__CYGWIN__) |
| # ifndef HAVE_VSNPRINTF |
| # define HAVE_VSNPRINTF |
| # endif |
| #endif |
| |
| #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410) |
| # ifndef HAVE_VSNPRINTF |
| # define HAVE_VSNPRINTF |
| # endif |
| #endif |
| |
| #ifndef HAVE_VSNPRINTF |
| # ifdef MSDOS |
| /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), |
| but for now we just assume it doesn't. */ |
| # define NO_vsnprintf |
| # endif |
| # ifdef __TURBOC__ |
| # define NO_vsnprintf |
| # endif |
| # ifdef WIN32 |
| /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ |
| # if !defined(vsnprintf) && !defined(NO_vsnprintf) |
| # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) |
| # define vsnprintf _vsnprintf |
| # endif |
| # endif |
| # endif |
| # ifdef __SASC |
| # define NO_vsnprintf |
| # endif |
| # ifdef VMS |
| # define NO_vsnprintf |
| # endif |
| # ifdef __OS400__ |
| # define NO_vsnprintf |
| # endif |
| # ifdef __MVS__ |
| # define NO_vsnprintf |
| # endif |
| #endif |
| |
| #ifndef local |
| # define local static |
| #endif |
| /* compile with -Dlocal if your debugger can't find static symbols */ |
| |
| /* gz* functions always use library allocation functions */ |
| #ifndef STDC |
| extern voidp malloc OF((uInt size)); |
| extern void free OF((voidpf ptr)); |
| #endif |
| |
| /* get errno and strerror definition */ |
| #if defined UNDER_CE |
| # include <windows.h> |
| # define zstrerror() gz_strwinerror((DWORD)GetLastError()) |
| #else |
| # ifndef NO_STRERROR |
| # include <errno.h> |
| # define zstrerror() strerror(errno) |
| # else |
| # define zstrerror() "stdio error (consult errno)" |
| # endif |
| #endif |
| |
| /* provide prototypes for these when building zlib without LFS */ |
| #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 |
| ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); |
| ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); |
| ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); |
| ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); |
| #endif |
| |
| /* default memLevel */ |
| #if MAX_MEM_LEVEL >= 8 |
| # define DEF_MEM_LEVEL 8 |
| #else |
| # define DEF_MEM_LEVEL MAX_MEM_LEVEL |
| #endif |
| |
| /* default i/o buffer size -- double this for output when reading */ |
| #define GZBUFSIZE 8192 |
| |
| /* gzip modes, also provide a little integrity check on the passed structure */ |
| #define GZ_NONE 0 |
| #define GZ_READ 7247 |
| #define GZ_WRITE 31153 |
| #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */ |
| |
| /* values for gz_state how */ |
| #define LOOK 0 /* look for a gzip header */ |
| #define COPY 1 /* copy input directly */ |
| #define GZIP 2 /* decompress a gzip stream */ |
| |
| /* internal gzip file state data structure */ |
| typedef struct { |
| /* exposed contents for gzgetc() macro */ |
| struct gzFile_s x; /* "x" for exposed */ |
| /* x.have: number of bytes available at x.next */ |
| /* x.next: next output data to deliver or write */ |
| /* x.pos: current position in uncompressed data */ |
| /* used for both reading and writing */ |
| int mode; /* see gzip modes above */ |
| int fd; /* file descriptor */ |
| char *path; /* path or fd for error messages */ |
| unsigned size; /* buffer size, zero if not allocated yet */ |
| unsigned want; /* requested buffer size, default is GZBUFSIZE */ |
| unsigned char *in; /* input buffer */ |
| unsigned char *out; /* output buffer (double-sized when reading) */ |
| int direct; /* 0 if processing gzip, 1 if transparent */ |
| /* just for reading */ |
| int how; /* 0: get header, 1: copy, 2: decompress */ |
| z_off64_t start; /* where the gzip data started, for rewinding */ |
| int eof; /* true if end of input file reached */ |
| int past; /* true if read requested past end */ |
| /* just for writing */ |
| int level; /* compression level */ |
| int strategy; /* compression strategy */ |
| /* seek request */ |
| z_off64_t skip; /* amount to skip (already rewound if backwards) */ |
| int seek; /* true if seek request pending */ |
| /* error information */ |
| int err; /* error code */ |
| char *msg; /* error message */ |
| /* zlib inflate or deflate stream */ |
| z_stream strm; /* stream structure in-place (not a pointer) */ |
| } gz_state; |
| typedef gz_state FAR *gz_statep; |
| |
| /* shared functions */ |
| void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *)); |
| #if defined UNDER_CE |
| char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error)); |
| #endif |
| |
| /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t |
| value -- needed when comparing unsigned to z_off64_t, which is signed |
| (possible z_off64_t types off_t, off64_t, and long are all signed) */ |
| #ifdef INT_MAX |
| # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX) |
| #else |
| unsigned ZLIB_INTERNAL gz_intmax OF((void)); |
| # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax()) |
| #endif |