third_party/lzma_sdk/Bra.h

   1 /* Bra.h -- Branch converters for executables
   2 2009-02-07 : Igor Pavlov : Public domain */
   3
   4 #ifndef __BRA_H
   5 #define __BRA_H
   6
   7 #include "Types.h"
   8
   9 #ifdef __cplusplus
  10 extern "C" {
  11 #endif
  12
  13 /*
  14 These functions convert relative addresses to absolute addresses
  15 in CALL instructions to increase the compression ratio.
  16
  17   In:
  18     data     - data buffer
  19     size     - size of data
  20     ip       - current virtual Instruction Pinter (IP) value
  21     state    - state variable for x86 converter
  22     encoding - 0 (for decoding), 1 (for encoding)
  23
  24   Out:
  25     state    - state variable for x86 converter
  26
  27   Returns:
  28     The number of processed bytes. If you call these functions with multiple calls,
  29     you must start next call with first byte after block of processed bytes.
  30
  31   Type   Endian  Alignment  LookAhead
  32
  33   x86    little      1          4
  34   ARMT   little      2          2
  35   ARM    little      4          0
  36   PPC     big        4          0
  37   SPARC   big        4          0
  38   IA64   little     16          0
  39
  40   size must be >= Alignment + LookAhead, if it's not last block.
  41   If (size < Alignment + LookAhead), converter returns 0.
  42
  43   Example:
  44
  45     UInt32 ip = 0;
  46     for ()
  47     {
  48       ; size must be >= Alignment + LookAhead, if it's not last block
  49       SizeT processed = Convert(data, size, ip, 1);
  50       data += processed;
  51       size -= processed;
  52       ip += processed;
  53     }
  54 */
  55
  56 #define x86_Convert_Init(state) { state = 0; }
  57 SizeT x86_Convert(Byte *data, SizeT size, UInt32 ip, UInt32 *state, int encoding);
  58 SizeT ARM_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);
  59 SizeT ARMT_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);
  60 SizeT PPC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);
  61 SizeT SPARC_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);
  62 SizeT IA64_Convert(Byte *data, SizeT size, UInt32 ip, int encoding);
  63
  64 #ifdef __cplusplus
  65 }
  66 #endif
  67
  68 #endif