HDD_Write.c

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#include "libFireBird.h"
 
bool HDD_Write(void *data, dword length, TYPE_File *f)
{
  TRACEENTER();
 
  static byte           block[512];
  static byte           *b = block;
  bool                  success = TRUE;
  dword                 blen;
 
  // flush buffer
  if(length == 0)
  {
    if(b > block)
    {
      success = (TAP_Hdd_Fwrite(block, sizeof(block), 1, f) == 1);
      b = block;
    }
  }
  // can't buffer data
  else if(length > sizeof(block)) success = (TAP_Hdd_Fwrite(data, length, 1, f) == 1);
  else
  {
    blen = sizeof(block) - (b - block);
 
    // not enough space in buffer
    if(length > blen)
    {
      // fill rest of buffer
      memcpy(b, data, blen);
      success = (TAP_Hdd_Fwrite(block, sizeof(block), 1, f) == 1);
 
      //(byte *) data += blen;
      data = (byte*)data + blen;
 
      length -= blen;
      b = block;
    }
 
    // new buffer
    if(b == block) memset(block, 0, sizeof(block));
 
    // enough space in buffer
    memcpy(b, data, length);
    b += length;
  }
 
  TRACEEXIT();
  return success;
}