Function UTF8StartCodepoint

src/string.cpp:487–498

Finds the byte index of the front of a codepoint by reversing until a non-continuation byte is found. */

/** Finds the byte index of the front of a codepoint by reversing until a non-continuation byte is found. */
static size_t UTF8StartCodepoint(const std::string& s8, size_t pos) {
	// Check out of bounds
	if (pos >= s8.size())
		return s8.size();
	while (pos > 0) {
		// Check for continuation byte 0b10xxxxxx
		if ((s8[pos] & 0xc0) != 0x80)
			break;
		pos--;
	}
	return pos;
}


size_t UTF8PrevCodepoint(const std::string& s8, size_t pos) {