cannam@89: /* gzguts.h -- zlib internal header definitions for gz* operations cannam@89: * Copyright (C) 2004, 2005, 2010, 2011, 2012 Mark Adler cannam@89: * For conditions of distribution and use, see copyright notice in zlib.h cannam@89: */ cannam@89: cannam@89: #ifdef _LARGEFILE64_SOURCE cannam@89: # ifndef _LARGEFILE_SOURCE cannam@89: # define _LARGEFILE_SOURCE 1 cannam@89: # endif cannam@89: # ifdef _FILE_OFFSET_BITS cannam@89: # undef _FILE_OFFSET_BITS cannam@89: # endif cannam@89: #endif cannam@89: cannam@89: #ifdef HAVE_HIDDEN cannam@89: # define ZLIB_INTERNAL __attribute__((visibility ("hidden"))) cannam@89: #else cannam@89: # define ZLIB_INTERNAL cannam@89: #endif cannam@89: cannam@89: #include cannam@89: #include "zlib.h" cannam@89: #ifdef STDC cannam@89: # include cannam@89: # include cannam@89: # include cannam@89: #endif cannam@89: #include cannam@89: cannam@89: #ifdef _WIN32 cannam@89: # include cannam@89: #endif cannam@89: cannam@89: #if defined(__TURBOC__) || defined(_MSC_VER) || defined(_WIN32) cannam@89: # include cannam@89: #endif cannam@89: cannam@89: #ifdef NO_DEFLATE /* for compatibility with old definition */ cannam@89: # define NO_GZCOMPRESS cannam@89: #endif cannam@89: cannam@89: #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550) cannam@89: # ifndef HAVE_VSNPRINTF cannam@89: # define HAVE_VSNPRINTF cannam@89: # endif cannam@89: #endif cannam@89: cannam@89: #if defined(__CYGWIN__) cannam@89: # ifndef HAVE_VSNPRINTF cannam@89: # define HAVE_VSNPRINTF cannam@89: # endif cannam@89: #endif cannam@89: cannam@89: #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410) cannam@89: # ifndef HAVE_VSNPRINTF cannam@89: # define HAVE_VSNPRINTF cannam@89: # endif cannam@89: #endif cannam@89: cannam@89: #ifndef HAVE_VSNPRINTF cannam@89: # ifdef MSDOS cannam@89: /* vsnprintf may exist on some MS-DOS compilers (DJGPP?), cannam@89: but for now we just assume it doesn't. */ cannam@89: # define NO_vsnprintf cannam@89: # endif cannam@89: # ifdef __TURBOC__ cannam@89: # define NO_vsnprintf cannam@89: # endif cannam@89: # ifdef WIN32 cannam@89: /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */ cannam@89: # if !defined(vsnprintf) && !defined(NO_vsnprintf) cannam@89: # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 ) cannam@89: # define vsnprintf _vsnprintf cannam@89: # endif cannam@89: # endif cannam@89: # endif cannam@89: # ifdef __SASC cannam@89: # define NO_vsnprintf cannam@89: # endif cannam@89: # ifdef VMS cannam@89: # define NO_vsnprintf cannam@89: # endif cannam@89: # ifdef __OS400__ cannam@89: # define NO_vsnprintf cannam@89: # endif cannam@89: # ifdef __MVS__ cannam@89: # define NO_vsnprintf cannam@89: # endif cannam@89: #endif cannam@89: cannam@89: #ifndef local cannam@89: # define local static cannam@89: #endif cannam@89: /* compile with -Dlocal if your debugger can't find static symbols */ cannam@89: cannam@89: /* gz* functions always use library allocation functions */ cannam@89: #ifndef STDC cannam@89: extern voidp malloc OF((uInt size)); cannam@89: extern void free OF((voidpf ptr)); cannam@89: #endif cannam@89: cannam@89: /* get errno and strerror definition */ cannam@89: #if defined UNDER_CE cannam@89: # include cannam@89: # define zstrerror() gz_strwinerror((DWORD)GetLastError()) cannam@89: #else cannam@89: # ifndef NO_STRERROR cannam@89: # include cannam@89: # define zstrerror() strerror(errno) cannam@89: # else cannam@89: # define zstrerror() "stdio error (consult errno)" cannam@89: # endif cannam@89: #endif cannam@89: cannam@89: /* provide prototypes for these when building zlib without LFS */ cannam@89: #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0 cannam@89: ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *)); cannam@89: ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int)); cannam@89: ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile)); cannam@89: ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile)); cannam@89: #endif cannam@89: cannam@89: /* default memLevel */ cannam@89: #if MAX_MEM_LEVEL >= 8 cannam@89: # define DEF_MEM_LEVEL 8 cannam@89: #else cannam@89: # define DEF_MEM_LEVEL MAX_MEM_LEVEL cannam@89: #endif cannam@89: cannam@89: /* default i/o buffer size -- double this for output when reading */ cannam@89: #define GZBUFSIZE 8192 cannam@89: cannam@89: /* gzip modes, also provide a little integrity check on the passed structure */ cannam@89: #define GZ_NONE 0 cannam@89: #define GZ_READ 7247 cannam@89: #define GZ_WRITE 31153 cannam@89: #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */ cannam@89: cannam@89: /* values for gz_state how */ cannam@89: #define LOOK 0 /* look for a gzip header */ cannam@89: #define COPY 1 /* copy input directly */ cannam@89: #define GZIP 2 /* decompress a gzip stream */ cannam@89: cannam@89: /* internal gzip file state data structure */ cannam@89: typedef struct { cannam@89: /* exposed contents for gzgetc() macro */ cannam@89: struct gzFile_s x; /* "x" for exposed */ cannam@89: /* x.have: number of bytes available at x.next */ cannam@89: /* x.next: next output data to deliver or write */ cannam@89: /* x.pos: current position in uncompressed data */ cannam@89: /* used for both reading and writing */ cannam@89: int mode; /* see gzip modes above */ cannam@89: int fd; /* file descriptor */ cannam@89: char *path; /* path or fd for error messages */ cannam@89: unsigned size; /* buffer size, zero if not allocated yet */ cannam@89: unsigned want; /* requested buffer size, default is GZBUFSIZE */ cannam@89: unsigned char *in; /* input buffer */ cannam@89: unsigned char *out; /* output buffer (double-sized when reading) */ cannam@89: int direct; /* 0 if processing gzip, 1 if transparent */ cannam@89: /* just for reading */ cannam@89: int how; /* 0: get header, 1: copy, 2: decompress */ cannam@89: z_off64_t start; /* where the gzip data started, for rewinding */ cannam@89: int eof; /* true if end of input file reached */ cannam@89: int past; /* true if read requested past end */ cannam@89: /* just for writing */ cannam@89: int level; /* compression level */ cannam@89: int strategy; /* compression strategy */ cannam@89: /* seek request */ cannam@89: z_off64_t skip; /* amount to skip (already rewound if backwards) */ cannam@89: int seek; /* true if seek request pending */ cannam@89: /* error information */ cannam@89: int err; /* error code */ cannam@89: char *msg; /* error message */ cannam@89: /* zlib inflate or deflate stream */ cannam@89: z_stream strm; /* stream structure in-place (not a pointer) */ cannam@89: } gz_state; cannam@89: typedef gz_state FAR *gz_statep; cannam@89: cannam@89: /* shared functions */ cannam@89: void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *)); cannam@89: #if defined UNDER_CE cannam@89: char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error)); cannam@89: #endif cannam@89: cannam@89: /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t cannam@89: value -- needed when comparing unsigned to z_off64_t, which is signed cannam@89: (possible z_off64_t types off_t, off64_t, and long are all signed) */ cannam@89: #ifdef INT_MAX cannam@89: # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX) cannam@89: #else cannam@89: unsigned ZLIB_INTERNAL gz_intmax OF((void)); cannam@89: # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax()) cannam@89: #endif