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#include "term/unicode/utf8.h"
#include <assert.h>
#include <stdio.h>
#include <string.h>
static void test_utf8_decode_one(void)
{
static const struct { const char *bytes; int len; uint32_t cp; } valid[] = {
{"\0", 1, 0}, {"\x7f", 1, 0x7f},
{"\xc2\x80", 2, 0x80}, {"\xdf\xbf", 2, 0x7ff},
{"\xe0\xa0\x80", 3, 0x800}, {"\xed\x9f\xbf", 3, 0xd7ff},
{"\xee\x80\x80", 3, 0xe000}, {"\xef\xbf\xbf", 3, 0xffff},
{"\xf0\x90\x80\x80", 4, 0x10000},
{"\xf4\x8f\xbf\xbf", 4, 0x10ffff},
};
for (size_t i = 0; i < sizeof(valid) / sizeof(*valid); i++) {
uint32_t cp = 0xdeadbeef;
for (int n = 0; n < valid[i].len; n++) {
int r = utf8_decode_one(valid[i].bytes, n, &cp);
assert(r == 0);
assert(cp == 0xdeadbeef);
}
int r = utf8_decode_one(valid[i].bytes, valid[i].len, &cp);
assert(r == valid[i].len);
assert(cp == valid[i].cp);
char followed[8];
memcpy(followed, valid[i].bytes, valid[i].len);
memcpy(followed + valid[i].len, "next", 4);
r = utf8_decode_one(followed, valid[i].len + 4, &cp);
assert(r == valid[i].len);
assert(cp == valid[i].cp);
}
static const char *const invalid[] = {
"\x80", "\xbf", "\xc0\x80", "\xc1\xbf", "\xc2X",
"\xe0\x9f\xbf", "\xed\xa0\x80", "\xed\xbf\xbf", "\xe1\x80X",
"\xf0\x8f\xbf\xbf", "\xf4\x90\x80\x80", "\xf5\x80\x80\x80",
"\xf8\x88\x80\x80\x80", "\xff", "\xf1\x80\x80X",
};
for (size_t i = 0; i < sizeof(invalid) / sizeof(*invalid); i++) {
uint32_t cp = 0xdeadbeef;
int r = utf8_decode_one(invalid[i], strlen(invalid[i]), &cp);
assert(r == 0);
assert(cp == 0xdeadbeef);
}
}
static void test_scalar_roundtrips(void)
{
for (uint32_t cp = 0; cp <= 0x10ffff; cp++) {
if (cp >= 0xd800 && cp <= 0xdfff) continue;
char bytes[UTF8_MAX_BYTES];
int len = utf8_encode(cp, bytes);
uint32_t scalar = 0, streamed = 0, state = UTF8_ACCEPT;
int r = utf8_decode_one(bytes, (size_t)len, &scalar);
assert(r == len);
assert(scalar == cp);
for (int i = 0; i < len; i++) {
utf8_decode(&state, &streamed, (unsigned char)bytes[i]);
if (i + 1 < len) assert(state != UTF8_ACCEPT && state != UTF8_REJECT);
}
assert(state == UTF8_ACCEPT && streamed == cp);
}
static const uint32_t invalid[] = {0xd800, 0xdfff, 0x110000, UINT32_MAX};
for (size_t i = 0; i < sizeof(invalid) / sizeof(*invalid); i++) {
char bytes[UTF8_MAX_BYTES];
int len = utf8_encode(invalid[i], bytes);
uint32_t cp = 0;
int r = utf8_decode_one(bytes, len, &cp);
assert(len == 3 && r == len && cp == 0xfffd);
}
}
static void test_utf8_sanitize(void)
{
char dst[64];
utf8_sanitize(dst, sizeof(dst), "hello \xe2\x82\xac\xf0\x9f\x98\x80");
assert(!strcmp(dst, "hello \xe2\x82\xac\xf0\x9f\x98\x80"));
utf8_sanitize(dst, sizeof(dst), "a\xff\x80" "b\xed\xa0\x80" "c\xe2\x82");
assert(!strcmp(dst, "abc"));
utf8_sanitize(dst, sizeof(dst), "");
assert(!strcmp(dst, ""));
utf8_sanitize(dst, sizeof(dst), "\xff\xfe");
assert(!strcmp(dst, ""));
utf8_sanitize(dst, 6, "ab\xe2\x82\xac" "cd");
assert(!strcmp(dst, "ab\xe2\x82\xac"));
utf8_sanitize(dst, 5, "ab\xe2\x82\xac" "cd");
assert(!strcmp(dst, "abcd"));
memset(dst, 'x', sizeof(dst));
utf8_sanitize(dst, 4, "abcdef");
assert(!strcmp(dst, "abc"));
memset(dst, 'x', sizeof(dst));
utf8_sanitize(dst, 0, "abc");
assert(dst[0] == 'x');
}
/* Each maximal invalid subpart gives U+FFFD. The byte that ends a subpart
* stays unused. */
static void test_ground_invalid_subparts(void)
{
uint32_t state = UTF8_ACCEPT, codep = 0, cp = 0xdead;
int n = utf8_decode_ground(&state, &codep, "\xe2\x80\x1b\xac", 4, &cp);
assert(n == 2);
assert(cp == 0xFFFD);
assert(state == UTF8_ACCEPT);
n = utf8_decode_ground(&state, &codep, "\xac", 1, &cp);
assert(n == 1);
assert(cp == 0xFFFD);
assert(state == UTF8_ACCEPT);
n = utf8_decode_ground(&state, &codep, "\xe2\x82z", 3, &cp);
assert(n == 2);
assert(cp == 0xFFFD);
assert(state == UTF8_ACCEPT);
n = utf8_decode_ground(&state, &codep, "\xe2\x82", 2, &cp);
assert(n == 2);
assert(cp == 0);
assert(state != UTF8_ACCEPT);
state = UTF8_ACCEPT;
codep = 0;
n = utf8_decode_ground(&state, &codep, "\xe2\x82\xac", 3, &cp);
assert(n == 3);
assert(cp == 0x20ac);
assert(state == UTF8_ACCEPT);
}
int main(void)
{
test_utf8_decode_one();
test_scalar_roundtrips();
test_utf8_sanitize();
test_ground_invalid_subparts();
puts("PASS: Unicode codec tests");
return 0;
}
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