You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
218 lines
6.7 KiB
218 lines
6.7 KiB
/* gzguts.h -- zlib internal header definitions for gz* operations |
|
* Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013, 2016 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 |
|
|
|
#ifndef _POSIX_SOURCE |
|
# define _POSIX_SOURCE |
|
#endif |
|
#include <fcntl.h> |
|
|
|
#ifdef _WIN32 |
|
# include <stddef.h> |
|
#endif |
|
|
|
#if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32) |
|
# include <io.h> |
|
#endif |
|
|
|
#if defined(_WIN32) || defined(__CYGWIN__) |
|
# define WIDECHAR |
|
#endif |
|
|
|
#ifdef WINAPI_FAMILY |
|
# define open _open |
|
# define read _read |
|
# define write _write |
|
# define close _close |
|
#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 |
|
|
|
/* unlike snprintf (which is required in C99), _snprintf does not guarantee |
|
null termination of the result -- however this is only used in gzlib.c where |
|
the result is assured to fit in the space provided */ |
|
#if defined(_MSC_VER) && _MSC_VER < 1900 |
|
# define snprintf _snprintf |
|
#endif |
|
|
|
#ifndef local |
|
# define local static |
|
#endif |
|
/* since "static" is used to mean two completely different things in C, we |
|
define "local" for the non-static meaning of "static", for readability |
|
(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 (this and |
|
twice this must be able to fit in an unsigned type) */ |
|
#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 (double-sized when writing) */ |
|
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
|
|
|