tt_int16 ReadInt16( InputStream *t )
{
register unsigned char *ptr = t->privateBase;
tt_uint32 pos = t->pos;
register tt_uint16 word;
#ifdef ENABLE_NON_RAM_STREAM
unsigned char base[2];
if ( ptr != NULL ) { /* ptr == t->privateBase */
ptr += pos; /* ptr == &t->privateBase[pos] */
#ifdef USE_PRE_CACHING
if ( t->ReadToRamFunc != NULL ) {
EnsureWeHaveDataInT2KInputStream( t, 2 );
ptr -= t->cachePosition; /* ptr = &t->privateBase[pos - t->cachePosition]; */
}
#endif
} else {
ptr = base;
t->ReadToRamFunc( t->nonRamID, ptr, pos, 2 );
}
#else
ptr += pos;
#endif
pos = pos + 2;
assert( pos <= t->maxPos );
t->pos = pos;
word = *ptr++;
word <<= 8;
word |= *ptr;
return (tt_int16)word; /*****/
}
int32 ReadInt32( InputStream *t )
{
register unsigned char *ptr = t->privateBase;
unsigned long pos = t->pos;
register uint32 lword;
#ifdef ENABLE_NON_RAM_STREAM
unsigned long delta;
unsigned char base[4];
if ( ptr != NULL ) { /* ptr == t->privateBase */
delta = pos; /* ptr == &t->privateBase[pos] */
#ifdef USE_PRE_CACHING
if ( t->ReadToRamFunc != NULL ) {
EnsureWeHaveDataInT2KInputStream( t, 4 );
/* Combine additions into one step wo we never have a pointer out of bounds. */
delta -= t->cachePosition; /* ptr = &t->privateBase[pos - t->cachePosition]; */
}
#endif
ptr += delta;
} else {
int ioCode;
ptr = base;
ioCode = t->ReadToRamFunc( t->nonRamID, ptr, pos, 4 );
tsi_Assert( t->mem, ioCode >= 0, T2K_EXT_IO_CALLBACK_ERR );
}
#else
ptr += pos;
#endif
pos = pos + 4;
assert( pos <= t->maxPos );
t->pos = pos;
lword = *ptr++;
lword <<= 8;
lword |= *ptr++;
lword <<= 8;
lword |= *ptr++;
lword <<= 8;
lword |= *ptr;
return (int32)lword; /*****/
}
