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extmod/modwebsocket: Save a few bytes of text by using bit checks.

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.. at least on x86_64 (unix standard build).  Size was unchanged on
RPI_PICO_W.

Signed-off-by: Jeff Epler <jepler@unpythonic.net>
This commit is contained in:
Jeff Epler
2025-10-04 19:03:47 -05:00
committed by Damien George
parent b94162b5df
commit 8013ef44db
1 changed files with 3 additions and 3 deletions
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6
extmod/modwebsocket.c
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@@ -143,13 +143,13 @@ static mp_uint_t websocket_read(mp_obj_t self_in, void *buf, mp_uint_t size, int
}
case FRAME_OPT: {
if ((self->buf_pos & 3) == 2) {
// First two bytes are message length
if (self->buf_pos & 2) { // to_recv was 2 or 6
assert(self->buf_pos == 2 || self->buf_pos == 6);
// First two bytes are message length. Technically the size must be at least 126 per RFC6455
// but MicroPython skips checking that.
self->msg_sz = (self->buf[0] << 8) | self->buf[1];
}
if (self->buf_pos >= 4) {
if (self->buf_pos & 4) {
// Last 4 bytes is mask
memcpy(self->mask, self->buf + self->buf_pos - 4, 4);
}