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#include <asm/system.h>

#define CRCI(x) (crci = (crci << 5) | (x))

#define CRCO(x) (crco = (crco << 5) | (x))

unsigned long decompress (unsigned char *in, unsigned char *out)

{

  unsigned char hist[0x10000];

  unsigned long size;

  int b = 0, i;

  unsigned char *orig = in;

  unsigned char *mask;

  unsigned short hash = 0;

  unsigned long crci = 0, crco = 0;

  for (i = 0; i < 0x10000; i++) hist[i] = 0;

  CRCI(*in); size = (*in++) << 24;

  CRCI(*in); size |= (*in++) << 16;

  CRCI(*in); size |= (*in++) << 8;

  CRCI(*in); size |= (*in++) << 0;

  CRCI(*in); mask = in++;

_print("Size = %x\n", size);

  for (i = 0; i < size; i++) {

    unsigned char c;

    if ((*mask >> b) & 1) c = hist[hash];

    else CRCI(c = *in++);

    CRCO(*out++ = c);

    hist[hash] = c;

    hash <<= 8;

    hash |= c;

    hash &= 0xffff;

    if (++b == 8) {

      CRCI(*in);

      mask = in++;

      b = 0;

    }

  }

/*

  print_str ("compressed CRC = ");

  print_n (crci);

  print_str ("\ndecompressed CRC = ");

  print_n (crco);

  print_str ("\ndecompressed size = ");

  print_n (size);

  print_str (" end ");

  print_n (out);

  print_str ("\ncompressed  size = ");

  print_n (in - orig);

  print_str (" end ");

  print_n (in);

  print_str ("\n");

*/

  return size;

}