void test_tolower() {
uint32_t u;
const char *map = 0;
map = nu_tolower(0x0041); /* A */
assert(map != 0);
nu_casemap_read(map, &u);
assert(u == 0x0061); /* a */
map = nu_tolower(0x0401); /* Ё */
assert(map != 0);
nu_casemap_read(map, &u);
assert(u == 0x0451); /* ё */
map = nu_tolower(0x00D4); /* Ô */
assert(map != 0);
nu_casemap_read(map, &u);
assert(u == 0x00F4); /* ô */
map = nu_tolower(0x00C6); /* Æ */
assert(map != 0);
nu_casemap_read(map, &u);
assert(u == 0x00E6); /* æ */
assert(nu_tolower(0x00A0) == 0);
assert(nu_tolower(0x0061) == 0);
}
const char* _nu_tolower(const char *encoded, const char *limit, nu_read_iterator_t read,
uint32_t *u, const char **transform,
void *context) {
(void)(context);
uint32_t _u = 0;
const char *np = read(encoded, &_u);
if (u != 0) {
*u = _u;
}
/* handling of 0x03A3 ('Σ')
*
* this is the only language-independent exception described in
* SpecialCasing.txt (Unicode 7.0) */
assert(nu_casemap_read == nu_utf8_read);
if (_u == 0x03A3) {
if (np >= limit) {
*transform = __nu_final_sigma;
return np;
}
uint32_t nu = 0;
read(np, &nu);
if (nu == 0) {
*transform = __nu_final_sigma;
return np;
}
}
*transform = nu_tolower(_u);
return np;
}
