Function ha_utf8_sequence_length

src/cli/hook_augment.c:224–263

}

static size_t ha_utf8_sequence_length(const unsigned char *input, size_t remaining) {
    if (!input || remaining == 0U) {
        return 0U;
    }
    unsigned char first = input[0];
    if (first < 0x80U) {
        return 1U;
    }
    if (first >= 0xc2U && first <= 0xdfU) {
        return remaining >= 2U && ha_is_utf8_continuation(input[1]) ? 2U : 0U;
    }
    if (first >= 0xe0U && first <= 0xefU) {
        if (remaining < 3U || !ha_is_utf8_continuation(input[2])) {
            return 0U;
        }
        unsigned char second = input[1];
        if (first == 0xe0U) {
            return second >= 0xa0U && second <= 0xbfU ? 3U : 0U;
        }
        if (first == 0xedU) {
            return second >= 0x80U && second <= 0x9fU ? 3U : 0U;
        }
        return ha_is_utf8_continuation(second) ? 3U : 0U;
    }
    if (first >= 0xf0U && first <= 0xf4U) {
        if (remaining < 4U || !ha_is_utf8_continuation(input[2]) ||
            !ha_is_utf8_continuation(input[3])) {
            return 0U;
        }
        unsigned char second = input[1];
        if (first == 0xf0U) {
            return second >= 0x90U && second <= 0xbfU ? 4U : 0U;
        }
        if (first == 0xf4U) {
            return second >= 0x80U && second <= 0x8fU ? 4U : 0U;
        }
        return ha_is_utf8_continuation(second) ? 4U : 0U;
    }
    return 0U;
}

/* Graph names and paths originate in the repository/index and are data, never
 * hook instructions. Keep valid UTF-8 sequences, collapse ASCII controls to a