TFDSize.c

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#include                "libFireBird.h"
#include                "FBLib_compression.h"
 
dword TFDSize(byte *pTFD)
{
  TRACEENTER();
 
  word                  NrBlocks = 0;
  dword                 i;
  byte                  *p = pTFD;
 
  if(!pTFD)
  {
    TRACEEXIT();
    return 0;
  }
 
  if(LOAD_WORD(p) != 8)
  {
    //Invalid header
    TRACEEXIT();
    return 0;
  }
 
  if(CRC16 (0, p + 4, 6) != LOAD_WORD(p + 2))
  {
    //Invalid header CRC
    TRACEEXIT();
    return 0;
  }
 
  if(LOAD_WORD(p + 6) != 1)
  {
    //Invalid file version
    TRACEEXIT();
    return 0;
  }
 
  NrBlocks = LOAD_WORD(p + 8);
  p += 10;
  for(i = 0; i < NrBlocks; i++)
    p += LOAD_WORD(p) + 2;
 
  TRACEEXIT();
  return p - pTFD;
}