MdeModulePkg: Apply uncrustify changes

[mirror_edk2.git] / MdeModulePkg / Library / LzmaCustomDecompressLib / Sdk / C / Bra86.c

/* Bra86.c -- Converter for x86 code (BCJ)\r
2017-04-03 : Igor Pavlov : Public domain */\r
\r
#include "Precomp.h"\r
\r
#include "Bra.h"\r
\r
#define Test86MSByte(b)  ((((b) + 1) & 0xFE) == 0)\r
\r
SizeT\r
x86_Convert (\r
  Byte    *data,\r
  SizeT   size,\r
  UInt32  ip,\r
  UInt32  *state,\r
  int     encoding\r
  )\r
{\r
  SizeT   pos  = 0;\r
  UInt32  mask = *state & 7;\r
\r
  if (size < 5) {\r
    return 0;\r
  }\r
\r
  size -= 4;\r
  ip   += 5;\r
\r
  for ( ; ;) {\r
    Byte        *p     = data + pos;\r
    const Byte  *limit = data + size;\r
    for ( ; p < limit; p++) {\r
      if ((*p & 0xFE) == 0xE8) {\r
        break;\r
      }\r
    }\r
\r
    {\r
      SizeT  d = (SizeT)(p - data - pos);\r
      pos = (SizeT)(p - data);\r
      if (p >= limit) {\r
        *state = (d > 2 ? 0 : mask >> (unsigned)d);\r
        return pos;\r
      }\r
\r
      if (d > 2) {\r
        mask = 0;\r
      } else {\r
        mask >>= (unsigned)d;\r
        if ((mask != 0) && ((mask > 4) || (mask == 3) || Test86MSByte (p[(size_t)(mask >> 1) + 1]))) {\r
          mask = (mask >> 1) | 4;\r
          pos++;\r
          continue;\r
        }\r
      }\r
    }\r
\r
    if (Test86MSByte (p[4])) {\r
      UInt32  v   = ((UInt32)p[4] << 24) | ((UInt32)p[3] << 16) | ((UInt32)p[2] << 8) | ((UInt32)p[1]);\r
      UInt32  cur = ip + (UInt32)pos;\r
      pos += 5;\r
      if (encoding) {\r
        v += cur;\r
      } else {\r
        v -= cur;\r
      }\r
\r
      if (mask != 0) {\r
        unsigned  sh = (mask & 6) << 2;\r
        if (Test86MSByte ((Byte)(v >> sh))) {\r
          v ^= (((UInt32)0x100 << sh) - 1);\r
          if (encoding) {\r
            v += cur;\r
          } else {\r
            v -= cur;\r
          }\r
        }\r
\r
        mask = 0;\r
      }\r
\r
      p[1] = (Byte)v;\r
      p[2] = (Byte)(v >> 8);\r
      p[3] = (Byte)(v >> 16);\r
      p[4] = (Byte)(0 - ((v >> 24) & 1));\r
    } else {\r
      mask = (mask >> 1) | 4;\r
      pos++;\r
    }\r
  }\r
}\r