UncompressedLoaderSize.c

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#include                "libFireBird.h"
#include                "FBLib_compression.h"
 
dword UncompressedLoaderSize(byte *pSrc)
{
  TRACEENTER();
 
  word                  compSize, uncompSize;
  dword                 outSize = 0;
 
  if(!pSrc)
  {
    TRACEEXIT();
    return 0;
  }
 
  uncompSize = LOAD_WORDLE(pSrc + 0);
  compSize   = LOAD_WORDLE(pSrc + 2);
 
  while(uncompSize != 0xfefe)
  {
    if(uncompSize > 0x8000)
    {
      //Uncompressed data block size too large
      TRACEEXIT();
 
      return 0;
    }
    pSrc += (4 + compSize);
    outSize += uncompSize;
 
    uncompSize = LOAD_WORDLE(pSrc + 0);
    compSize   = LOAD_WORDLE(pSrc + 2);
  }
 
  TRACEEXIT();
  return outSize;
}