gzguts.h

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#ifdef _LARGEFILE64_SOURCE
#  ifndef _LARGEFILE_SOURCE
#    define _LARGEFILE_SOURCE 1
#  endif
#  undef _FILE_OFFSET_BITS
#  undef _TIME_BITS
#endif
 
#ifdef HAVE_HIDDEN
#  define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
#else
#  define ZLIB_INTERNAL
#endif
 
#include <stdio.h>
#include <zlib/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)
#  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(uInt size);
  extern void   free(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 (const char *, const char *);
    ZEXTERN z_off64_t ZEXPORT gzseek64 (gzFile, z_off64_t, int);
    ZEXTERN z_off64_t ZEXPORT gztell64 (gzFile);
    ZEXTERN z_off64_t ZEXPORT gzoffset64 (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 */
 
typedef struct {
    struct gzFile_s x;
 
    int mode;               
    int fd;                 
    char *path;             
    unsigned size;          
    unsigned want;          
    unsigned char *in;      
    unsigned char *out;     
    int direct;             
    int how;                
    z_off64_t start;        
    int eof;                
    int past;               
    int level;              
    int strategy;           
    int reset;              
    z_off64_t skip;         
    int seek;               
    int err;                
    char *msg;              
    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 (gz_statep, int, const char *);
#if defined UNDER_CE
char ZLIB_INTERNAL *gz_strwinerror (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(void);
#  define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
#endif