/src/FreeImage/Source/ZLib/gzguts.h

https://bitbucket.org/cabalistic/ogredeps/ · C++ Header · 190 lines · 140 code · 20 blank · 30 comment · 16 complexity · 578eff4b035bbb23b6a45942eda19dee MD5 · raw file

  1. /* gzguts.h -- zlib internal header definitions for gz* operations
  2. * Copyright (C) 2004, 2005, 2010, 2011, 2012 Mark Adler
  3. * For conditions of distribution and use, see copyright notice in zlib.h
  4. */
  5. #ifdef _LARGEFILE64_SOURCE
  6. # ifndef _LARGEFILE_SOURCE
  7. # define _LARGEFILE_SOURCE 1
  8. # endif
  9. # ifdef _FILE_OFFSET_BITS
  10. # undef _FILE_OFFSET_BITS
  11. # endif
  12. #endif
  13. #if ((__GNUC__-0) * 10 + __GNUC_MINOR__-0 >= 33) && !defined(NO_VIZ)
  14. # define ZLIB_INTERNAL __attribute__((visibility ("hidden")))
  15. #else
  16. # define ZLIB_INTERNAL
  17. #endif
  18. #include <stdio.h>
  19. #include "zlib.h"
  20. #ifdef STDC
  21. # include <string.h>
  22. # include <stdlib.h>
  23. # include <limits.h>
  24. #endif
  25. #include <fcntl.h>
  26. #ifdef __TURBOC__
  27. # include <io.h>
  28. #endif
  29. #ifdef NO_DEFLATE /* for compatibility with old definition */
  30. # define NO_GZCOMPRESS
  31. #endif
  32. #if defined(STDC99) || (defined(__TURBOC__) && __TURBOC__ >= 0x550)
  33. # ifndef HAVE_VSNPRINTF
  34. # define HAVE_VSNPRINTF
  35. # endif
  36. #endif
  37. #if defined(__CYGWIN__)
  38. # ifndef HAVE_VSNPRINTF
  39. # define HAVE_VSNPRINTF
  40. # endif
  41. #endif
  42. #if defined(MSDOS) && defined(__BORLANDC__) && (BORLANDC > 0x410)
  43. # ifndef HAVE_VSNPRINTF
  44. # define HAVE_VSNPRINTF
  45. # endif
  46. #endif
  47. #ifndef HAVE_VSNPRINTF
  48. # ifdef MSDOS
  49. /* vsnprintf may exist on some MS-DOS compilers (DJGPP?),
  50. but for now we just assume it doesn't. */
  51. # define NO_vsnprintf
  52. # endif
  53. # ifdef __TURBOC__
  54. # define NO_vsnprintf
  55. # endif
  56. # ifdef WIN32
  57. /* In Win32, vsnprintf is available as the "non-ANSI" _vsnprintf. */
  58. # if !defined(vsnprintf) && !defined(NO_vsnprintf)
  59. # if !defined(_MSC_VER) || ( defined(_MSC_VER) && _MSC_VER < 1500 )
  60. # include <io.h>
  61. # define vsnprintf _vsnprintf
  62. # endif
  63. # endif
  64. # endif
  65. # ifdef __SASC
  66. # define NO_vsnprintf
  67. # endif
  68. # ifdef VMS
  69. # define NO_vsnprintf
  70. # endif
  71. # ifdef __OS400__
  72. # define NO_vsnprintf
  73. # endif
  74. # ifdef __MVS__
  75. # define NO_vsnprintf
  76. # endif
  77. #endif
  78. #ifndef local
  79. # define local static
  80. #endif
  81. /* compile with -Dlocal if your debugger can't find static symbols */
  82. /* gz* functions always use library allocation functions */
  83. #ifndef STDC
  84. extern voidp malloc OF((uInt size));
  85. extern void free OF((voidpf ptr));
  86. #endif
  87. /* get errno and strerror definition */
  88. #if defined UNDER_CE
  89. # include <windows.h>
  90. # define zstrerror() gz_strwinerror((DWORD)GetLastError())
  91. #else
  92. # ifdef STDC
  93. # include <errno.h>
  94. # define zstrerror() strerror(errno)
  95. # else
  96. # define zstrerror() "stdio error (consult errno)"
  97. # endif
  98. #endif
  99. /* provide prototypes for these when building zlib without LFS */
  100. #if !defined(_LARGEFILE64_SOURCE) || _LFS64_LARGEFILE-0 == 0
  101. ZEXTERN gzFile ZEXPORT gzopen64 OF((const char *, const char *));
  102. ZEXTERN z_off64_t ZEXPORT gzseek64 OF((gzFile, z_off64_t, int));
  103. ZEXTERN z_off64_t ZEXPORT gztell64 OF((gzFile));
  104. ZEXTERN z_off64_t ZEXPORT gzoffset64 OF((gzFile));
  105. #endif
  106. /* default memLevel */
  107. #if MAX_MEM_LEVEL >= 8
  108. # define DEF_MEM_LEVEL 8
  109. #else
  110. # define DEF_MEM_LEVEL MAX_MEM_LEVEL
  111. #endif
  112. /* default i/o buffer size -- double this for output when reading */
  113. #define GZBUFSIZE 8192
  114. /* gzip modes, also provide a little integrity check on the passed structure */
  115. #define GZ_NONE 0
  116. #define GZ_READ 7247
  117. #define GZ_WRITE 31153
  118. #define GZ_APPEND 1 /* mode set to GZ_WRITE after the file is opened */
  119. /* values for gz_state how */
  120. #define LOOK 0 /* look for a gzip header */
  121. #define COPY 1 /* copy input directly */
  122. #define GZIP 2 /* decompress a gzip stream */
  123. /* internal gzip file state data structure */
  124. typedef struct {
  125. /* exposed contents for gzgetc() macro */
  126. struct gzFile_s x; /* "x" for exposed */
  127. /* x.have: number of bytes available at x.next */
  128. /* x.next: next output data to deliver or write */
  129. /* x.pos: current position in uncompressed data */
  130. /* used for both reading and writing */
  131. int mode; /* see gzip modes above */
  132. int fd; /* file descriptor */
  133. char *path; /* path or fd for error messages */
  134. unsigned size; /* buffer size, zero if not allocated yet */
  135. unsigned want; /* requested buffer size, default is GZBUFSIZE */
  136. unsigned char *in; /* input buffer */
  137. unsigned char *out; /* output buffer (double-sized when reading) */
  138. int direct; /* 0 if processing gzip, 1 if transparent */
  139. /* just for reading */
  140. int how; /* 0: get header, 1: copy, 2: decompress */
  141. z_off64_t start; /* where the gzip data started, for rewinding */
  142. int eof; /* true if end of input file reached */
  143. int past; /* true if read requested past end */
  144. /* just for writing */
  145. int level; /* compression level */
  146. int strategy; /* compression strategy */
  147. /* seek request */
  148. z_off64_t skip; /* amount to skip (already rewound if backwards) */
  149. int seek; /* true if seek request pending */
  150. /* error information */
  151. int err; /* error code */
  152. char *msg; /* error message */
  153. /* zlib inflate or deflate stream */
  154. z_stream strm; /* stream structure in-place (not a pointer) */
  155. } gz_state;
  156. typedef gz_state FAR *gz_statep;
  157. /* shared functions */
  158. void ZLIB_INTERNAL gz_error OF((gz_statep, int, const char *));
  159. #if defined UNDER_CE
  160. char ZLIB_INTERNAL *gz_strwinerror OF((DWORD error));
  161. #endif
  162. /* GT_OFF(x), where x is an unsigned value, is true if x > maximum z_off64_t
  163. value -- needed when comparing unsigned to z_off64_t, which is signed
  164. (possible z_off64_t types off_t, off64_t, and long are all signed) */
  165. #ifdef INT_MAX
  166. # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > INT_MAX)
  167. #else
  168. unsigned ZLIB_INTERNAL gz_intmax OF((void));
  169. # define GT_OFF(x) (sizeof(int) == sizeof(z_off64_t) && (x) > gz_intmax())
  170. #endif