Function appendBitsToBuffer

modules/data/qrcode/qrcodegen.c:184–188

Appends the given sequence of bits to the given byte-based bit buffer, increasing the bit length.

// Appends the given sequence of bits to the given byte-based bit buffer, increasing the bit length.
testable void appendBitsToBuffer(unsigned int val, int numBits, uint8_t buffer[], int *bitLen) {
	assert(0 <= numBits && numBits <= 16 && (unsigned long)val >> numBits == 0);
	for (int i = numBits - 1; i >= 0; i--, (*bitLen)++)
		buffer[*bitLen >> 3] |= ((val >> i) & 1) << (7 - (*bitLen & 7));
}