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  1. /*
  2. This Software is distributed with the following X11 License,
  3. sometimes also known as MIT license.
  4.  
  5. Copyright (c) 2010 Miguel A. Ballicora
  6.  
  7.  Permission is hereby granted, free of charge, to any person
  8.  obtaining a copy of this software and associated documentation
  9.  files (the "Software"), to deal in the Software without
  10.  restriction, including without limitation the rights to use,
  11.  copy, modify, merge, publish, distribute, sublicense, and/or sell
  12.  copies of the Software, and to permit persons to whom the
  13.  Software is furnished to do so, subject to the following
  14.  conditions:
  15.  
  16.  The above copyright notice and this permission notice shall be
  17.  included in all copies or substantial portions of the Software.
  18.  
  19.  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20.  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
  21.  OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22.  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  23.  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  24.  WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  25.  FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  26.  OTHER DEALINGS IN THE SOFTWARE.
  27. */
  28.  
  29. /*--------------------------------------------------------------------------*\
  30. |
  31. |                   Compressing wrapper functions
  32. |
  33. *---------------------------------------------------------------------------*/
  34. #define MAXBLOCK (1 << 16)
  35.  
  36. #include <stdlib.h>
  37. #include "gtb-dec.h"
  38. #ifdef HUFFMAN
  39. #include "hzip.h"
  40. #endif
  41. #include "wrap.h"
  42.  
  43. typedef int bool_t;
  44.  
  45. #ifndef TRUE
  46. #define TRUE 1
  47. #endif
  48. #ifndef FALSE
  49. #define FALSE 0;
  50. #endif
  51.  
  52. /*static unsigned char intermediate_block[MAXBLOCK] ;*/
  53.  
  54. static int DECODE_SCHEME = CP4;
  55. static int CP_SCHEME = CP4;
  56.  
  57. static int f_decode (size_t z, unsigned char *bz, size_t n, unsigned char *bp);
  58.  
  59. extern void
  60. set_decoding_scheme(int x)
  61. {
  62.         DECODE_SCHEME = x;
  63.         CP_SCHEME     = x;
  64. }
  65.  
  66. extern int decoding_scheme(void)
  67. {
  68.         return DECODE_SCHEME;
  69. }
  70.  
  71. extern int
  72. decode (size_t z, unsigned char *bz, size_t n, unsigned char *bp)
  73. {
  74.         return f_decode (z, bz, n, bp);
  75. }
  76.  
  77. /*======================== WRAPPERS ========================*/
  78.  
  79. static int
  80. f_decode (size_t z, unsigned char *bz, size_t n, unsigned char *bp)
  81. {
  82. /*      bp buffer provided
  83. |       bz buffer "zipped", compressed
  84. |       n  len of buffer provided
  85. |       z  len of buffer zipped
  86. \*---------------------------------------------------------------*/
  87.  
  88. /*
  89.         unsigned char *ib = intermediate_block;
  90.         unsigned int m;
  91.         return  huff_decode (bz, z, ib, &m, MAXBLOCK) && rle_decode (ib, m, bp, &n, MAXBLOCK);
  92. */
  93. #if defined(HUFFMAN)
  94.         if        (CP_SCHEME == CP1) {
  95.  
  96.                 /* HUFFMAN */
  97.                 return huff_decode (bz, z, bp, &n, MAXBLOCK);
  98.  
  99.         } else
  100. #endif
  101. #if defined(LIBLZF)
  102.         if (CP_SCHEME == CP2) {
  103.  
  104.                 /* LZF */
  105.                 return lzf_decode  (bz, z, bp, &n, MAXBLOCK);
  106.  
  107.         } else
  108. #endif
  109. #if defined (ZLIB)
  110.     if (CP_SCHEME == CP3) {
  111.  
  112.                 /* ZLIB */
  113.                 return zlib_decode (bz, z, bp, &n, MAXBLOCK);
  114.  
  115.         } else
  116. #endif
  117.     if (CP_SCHEME == CP4) {
  118.  
  119.                 /* LZMA86 */
  120.                 return lzma_decode (bz, z, bp, &n, n); /* maximum needs to be the exact number that it will produce */
  121.  
  122.         } else if (CP_SCHEME == CP7) {
  123.  
  124.                 /* RLE */
  125.                 return rle_decode (bz, z, bp, &n, MAXBLOCK);
  126.  
  127.         #if defined (LIBBZIP2)
  128.         } else if (CP_SCHEME == CP8) {
  129.  
  130.                 /* BZIP2 */
  131.                 return bzip2_decode (bz, z, bp, &n, MAXBLOCK);
  132.         #endif
  133.  
  134.         } else if (CP_SCHEME == CP9) {
  135.  
  136.                 return justcopy_decode (bz, z, bp, &n, MAXBLOCK);
  137.  
  138.         } else {
  139.  
  140.                 return FALSE;
  141.         }
  142. }
  143.  
  144.