lzmatest.c

Compress and decompress algorithm in C for vxWorks.

/* 
LzmaTest.c
Test application for LZMA Decoder
LZMA SDK 4.02 Copyright (c) 1999-2004 Igor Pavlov (2004-06-10)
*/


#include "LzmaDecode.h"


int decompressImage(unsigned char *ComSrcAddr, unsigned char *UncomSrcAddr, int nbytes);

/*modified by claire*/
#if 1

int decompressImage(unsigned char *ComSrcAddr, unsigned char *UncomSrcAddr, int nbytes)
{
  unsigned int processedSize;
  unsigned int compressedSize, outSize, outSizeProcessed, lzmaInternalSize;
  void *lzmaInternalData;
  unsigned char properties[5];
  unsigned char prop0;
  int ii;
  int lc, lp, pb;
  int res;
  
  memcpy(properties, ComSrcAddr, 5);
 
  outSize = 0;
  for(ii = 0; ii < 4; ii++)  
  {
     	unsigned char b;       
      	memcpy(&b, ComSrcAddr+5+ii, 1);      
     	outSize += (unsigned int)(b) << (ii * 8);    
  }
  
  #if 0
   printf("outSize = %d \r\n", outSize);
  #endif
  
  if(outSize == 0xFFFFFFFF)
  {   
  	#if 0
    		printf("\n stream version is not supported \r\n");
    	#endif
    return ERROR;
  }
  
  for(ii = 0; ii <4; ii++)  
  {
      unsigned char b;

      memcpy(&b, ComSrcAddr+4+5+ii, 1);
    
      if(b != 0)
      {
      	#if 0
        printf("\n too long file");
        #endif
        return ERROR;
      }
  }

  ComSrcAddr = ComSrcAddr + 5 + 4 + 4;
  
  prop0 = properties[0];
  if(prop0 >= (9*5*5))
  {
  	#if 0
    	printf("\n Properties error");
    	#endif
    	return ERROR;
  }
  for(pb = 0; prop0 >= (9 * 5); 
    pb++, prop0 -= (9 * 5));
    
  for(lp = 0; prop0 >= 9; 
    lp++, prop0 -= 9);
    
  lc = prop0;

  lzmaInternalSize = 
    (LZMA_BASE_SIZE + (LZMA_LIT_SIZE << (lc + lp)))* sizeof(CProb);
 
 #ifdef MEMORY_32  
  lzmaInternalData =  (unsigned char *)(RAM_HIGH_ADRS+(8*1024*1024));
 #else
  lzmaInternalData =  (unsigned char *)(RAM_HIGH_ADRS+(3*1024*1024));
 #endif

  if(UncomSrcAddr == 0 || lzmaInternalData == 0)
  {
 	#if 0
    printf("\n can't allocate");
    	#endif
    return ERROR;
  }

  #if 0
  printf("LzmaTest: LzmaDecode, lzmaInternalSize = %d ...\r\n", lzmaInternalSize);
  #endif
  
  res = LzmaDecode((unsigned char *)lzmaInternalData, lzmaInternalSize,
      	lc, lp, pb,
      	ComSrcAddr, nbytes,
      	UncomSrcAddr, outSize, &outSizeProcessed);
  	
  	outSize = outSizeProcessed;
  	
  #if 0
  printf("LzmaTest: LzmaDecode done ...\r\n");
  #endif  

  if (res != 0)
  {  
    #if 0
    printf("\nerror = %d\n", res);
    #endif
    
    return ERROR;
  }
  
  #if 0
  printf("Loading image \r\n");  
  #endif
  		  	
  return OK;  	

}

#endif