static void
test_back_utf8_char(TestBatchRunner *runner) {
char buffer[4];
char *buf = buffer + 1;
uint32_t len = Str_encode_utf8_char(0x263A, buffer);
char *end = buffer + len;
TEST_TRUE(runner, StrHelp_back_utf8_char(end, buffer) == buffer,
"back_utf8_char");
TEST_TRUE(runner, StrHelp_back_utf8_char(end, buf) == NULL,
"back_utf8_char returns NULL rather than back up beyond start");
TEST_TRUE(runner, StrHelp_back_utf8_char(buffer, buffer) == NULL,
"back_utf8_char returns NULL when end == start");
int32_t code_point;
for (code_point = 0; code_point <= 0x10FFFF; code_point++) {
uint32_t size = Str_encode_utf8_char(code_point, buffer);
char *start = buffer;
char *end = start + size;
if (StrHelp_back_utf8_char(end, start) != start) {
break;
}
}
if (code_point == 0x110000) {
PASS(runner, "back_utf8_char works for code points 0 - 0x10FFFF");
}
else {
FAIL(runner, "Failed back_utf8_char at 0x%.1X", (unsigned)code_point);
}
}
static void
test_back_utf8_char(TestBatchRunner *runner) {
char buffer[4];
char *buf = buffer + 1;
uint32_t len = StrHelp_encode_utf8_char(0x263A, buffer);
char *end = buffer + len;
TEST_TRUE(runner, StrHelp_back_utf8_char(end, buffer) == buffer,
"back_utf8_char");
TEST_TRUE(runner, StrHelp_back_utf8_char(end, buf) == NULL,
"back_utf8_char returns NULL rather than back up beyond start");
TEST_TRUE(runner, StrHelp_back_utf8_char(buffer, buffer) == NULL,
"back_utf8_char returns NULL when end == start");
}
static void
S_set_error(CharBuf *mess, char *json, char *limit, int line,
const char *func) {
if (func) {
CB_catf(mess, " at %s %s line %i32 near ", func, __FILE__,
(int32_t)line);
}
else {
CB_catf(mess, " at %s line %i32 near ", __FILE__, (int32_t)line);
}
// Append escaped text.
int64_t len = limit - json;
if (len > 32) {
const char *end = StrHelp_back_utf8_char(json + 32, json);
len = end - json;
}
ZombieCharBuf *snippet = ZCB_WRAP_STR(json, len);
S_append_json_string((Obj*)snippet, mess);
// Set Err_error.
Err_set_error(Err_new(mess));
}
static void
test_utf8_round_trip(TestBatchRunner *runner) {
int32_t code_point;
for (code_point = 0; code_point <= 0x10FFFF; code_point++) {
char buffer[4];
uint32_t size = StrHelp_encode_utf8_char(code_point, buffer);
char *start = buffer;
char *end = start + size;
// Verify length returned by encode_utf8_char().
if (size != StrHelp_UTF8_COUNT[(unsigned char)buffer[0]]) {
break;
}
// Verify that utf8_valid() agrees with alternate implementation.
if (!!StrHelp_utf8_valid(start, size)
!= !!S_utf8_valid_alt(start, size)
) {
break;
}
// Verify back_utf8_char().
if (StrHelp_back_utf8_char(end, start) != start) {
break;
}
// Verify round trip of encode/decode.
if (StrHelp_decode_utf8_char(buffer) != code_point) {
break;
}
}
if (code_point == 0x110000) {
PASS(runner, "Successfully round tripped 0 - 0x10FFFF");
}
else {
FAIL(runner, "Failed round trip at 0x%.1X", (unsigned)code_point);
}
}
