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/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file LICENSE.rst or https://cmake.org/licensing for details. */
#include <cm/string_view>
#include <stdio.h>
#include <cm_utf8.h>
using test_utf8_char = cm::string_view const;
static void byte_array_print(test_utf8_char s)
{
bool started = false;
printf("[");
for (char c : s) {
if (started) {
printf(",");
}
started = true;
printf("0x%02X", static_cast<unsigned char>(c));
}
printf("]");
}
struct test_utf8_entry
{
test_utf8_char str;
unsigned int chr;
};
static test_utf8_entry const good_entry[] = {
{ "\x20", 0x0020 }, /* Space. */
{ "\xC2\xA9", 0x00A9 }, /* Copyright. */
{ "\xE2\x80\x98", 0x2018 }, /* Open-single-quote. */
{ "\xE2\x80\x99", 0x2019 }, /* Close-single-quote. */
{ "\xF0\xA3\x8E\xB4", 0x233B4 }, /* Example from RFC 3629. */
{ "\xED\x80\x80", 0xD000 }, /* Valid 0xED prefixed codepoint. */
{ "\xF4\x8F\xBF\xBF", 0x10FFFF }, /* Highest valid RFC codepoint. */
{ {}, 0 }
};
static test_utf8_char const bad_chars[] = {
"\x80", /* Leading continuation byte. */
"\xC0\x80", /* Overlong encoding. */
"\xC1\x80", /* Overlong encoding. */
"\xC2", /* Missing continuation byte. */
"\xE0", /* Missing continuation bytes. */
"\xE0\x80\x80", /* Overlong encoding. */
"\xF0\x80\x80\x80", /* Overlong encoding. */
"\xED\xA0\x80", /* UTF-16 surrogate half. */
"\xED\xBF\xBF", /* UTF-16 surrogate half. */
"\xF4\x90\x80\x80", /* Lowest out-of-range codepoint. */
"\xF5\x80\x80\x80", /* Prefix forces out-of-range codepoints. */
{}
};
static char const* good_strings[] = { "", "ASCII", "\xC2\xA9 Kitware", 0 };
static char const* bad_strings[] = {
"\xC0\x80", /* Modified UTF-8 for embedded 0-byte. */
0
};
static void report_good(bool passed, test_utf8_char c)
{
printf("%s: decoding good ", passed ? "pass" : "FAIL");
byte_array_print(c);
printf(" (%s) ", c.data());
}
static void report_bad(bool passed, test_utf8_char c)
{
printf("%s: decoding bad ", passed ? "pass" : "FAIL");
byte_array_print(c);
printf(" ");
}
static bool decode_good(test_utf8_entry const& entry)
{
auto const& s = entry.str;
unsigned int uc;
if (char const* e =
cm_utf8_decode_character(s.data(), s.data() + s.size(), &uc)) {
int used = static_cast<int>(e - s.data());
if (uc != entry.chr) {
report_good(false, s);
printf("expected 0x%04X, got 0x%04X\n", entry.chr, uc);
return false;
}
if (used != int(s.size())) {
report_good(false, s);
printf("had %d bytes, used %d\n", int(s.size()), used);
return false;
}
report_good(true, s);
printf("got 0x%04X\n", uc);
return true;
}
report_good(false, s);
printf("failed\n");
return false;
}
static bool decode_bad(test_utf8_char s)
{
unsigned int uc = 0xFFFFu;
char const* e = cm_utf8_decode_character(s.data(), s.data() + s.size(), &uc);
if (e) {
report_bad(false, s);
printf("expected failure, got 0x%04X\n", uc);
return false;
}
report_bad(true, s);
printf("failed as expected\n");
return true;
}
static void report_valid(bool passed, test_utf8_char s)
{
printf("%s: validity good ", passed ? "pass" : "FAIL");
byte_array_print(s);
printf(" (%s) ", s.data());
}
static void report_invalid(bool passed, test_utf8_char s)
{
printf("%s: validity bad ", passed ? "pass" : "FAIL");
byte_array_print(s);
printf(" ");
}
static bool is_valid(test_utf8_char s)
{
bool valid = cm_utf8_is_valid(s.data()) != 0;
if (!valid) {
report_valid(false, s);
printf("expected valid, reported as invalid\n");
return false;
}
report_valid(true, s);
printf("valid as expected\n");
return true;
}
static bool is_invalid(test_utf8_char s)
{
bool valid = cm_utf8_is_valid(s.data()) != 0;
if (valid) {
report_invalid(false, s);
printf("expected invalid, reported as valid\n");
return false;
}
report_invalid(true, s);
printf("invalid as expected\n");
return true;
}
int testUTF8(int /*unused*/, char* /*unused*/[])
{
int result = 0;
for (test_utf8_entry const* e = good_entry; !e->str.empty(); ++e) {
if (!decode_good(*e)) {
result = 1;
}
if (!is_valid(e->str)) {
result = 1;
}
}
for (test_utf8_char* c = bad_chars; !(*c).empty(); ++c) {
if (!decode_bad(*c)) {
result = 1;
}
if (!is_invalid(*c)) {
result = 1;
}
}
for (char const** s = good_strings; *s; ++s) {
if (!is_valid(*s)) {
result = 1;
}
}
for (char const** s = bad_strings; *s; ++s) {
if (!is_invalid(*s)) {
result = 1;
}
}
return result;
}
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