diff options
Diffstat (limited to 'gzguts.h')
| -rw-r--r-- | gzguts.h | 103 |
1 files changed, 90 insertions, 13 deletions
@@ -1,5 +1,5 @@ /* gzguts.h -- zlib internal header definitions for gz* operations - * Copyright (C) 2004, 2005, 2010 Mark Adler + * Copyright (C) 2004, 2005, 2010, 2011, 2012, 2013 Mark Adler * For conditions of distribution and use, see copyright notice in zlib.h */ @@ -12,7 +12,7 @@ # endif #endif -#if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ) +#ifdef HAVE_HIDDEN # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) #else # define ZLIB_INTERNAL @@ -27,13 +27,80 @@ #endif #include <fcntl.h> +#ifdef _WIN32 +# include <stddef.h> +#endif + +#if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32) +# include <io.h> +#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, yet still not supported by + Microsoft more than a decade later!), _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 */ #ifdef _MSC_VER -# include <io.h> -# define vsnprintf _vsnprintf +# define snprintf _snprintf #endif #ifndef local @@ -52,7 +119,7 @@ # include <windows.h> # define zstrerror() gz_strwinerror((DWORD)GetLastError()) #else -# ifdef STDC +# ifndef NO_STRERROR # include <errno.h> # define zstrerror() strerror(errno) # else @@ -68,7 +135,15 @@ ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); #endif -/* default i/o buffer size -- double this for output when reading */ +/* 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 */ @@ -84,23 +159,25 @@ /* 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 */ - z_off64_t pos; /* current position in uncompressed data */ 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) */ - unsigned char *next; /* next output data to deliver or write */ + int direct; /* 0 if processing gzip, 1 if transparent */ /* just for reading */ - unsigned have; /* amount of output data unused at next */ - int eof; /* true if end of input file reached */ - z_off64_t start; /* where the gzip data started, for rewinding */ - z_off64_t raw; /* where the raw data started, for seeking */ int how; /* 0: get header, 1: copy, 2: decompress */ - int direct; /* true if last read direct, false if gzip */ + 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 */ |