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py/binary: Do zero extension when storing a value larger than word size.

pull/1/head
Damien George 2016-12-12 15:00:06 +11:00
parent aee13ef3f2
commit a3c61004c2
1 changed files with 4 additions and 3 deletions
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7
py/binary.c
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@ -294,9 +294,10 @@ void mp_binary_set_val(char struct_type, char val_type, mp_obj_t val_in, byte **
#endif
{
val = mp_obj_get_int(val_in);
// sign extend if needed
if (BYTES_PER_WORD < 8 && size > sizeof(val) && is_signed(val_type) && (mp_int_t)val < 0) {
memset(p + sizeof(val), 0xff, size - sizeof(val));
// zero/sign extend if needed
if (BYTES_PER_WORD < 8 && size > sizeof(val)) {
int c = (is_signed(val_type) && (mp_int_t)val < 0) ? 0xff : 0x00;
memset(p + sizeof(val), c, size - sizeof(val));
}
}
}