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several wayland fixes, new util function MwIsUTF8 so that both backends can consistently check if something is a valid utf8
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IoIxD 2026-03-27 15:14:04 -07:00
commit 4d694bba49
5 changed files with 182 additions and 66 deletions
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62
src/string.c
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@ -37,3 +37,65 @@ void MwStringTime(char* out, time_t t) {
sprintf(out, "%s %2d %02d:%02d %d", months[tm->tm_mon], tm->tm_mday, tm->tm_hour, tm->tm_min, 1900 + tm->tm_year);
}
}
MWDECL MwBool MwIsKeyUTF8(MwU32 key) {
unsigned char bytes[sizeof(MwU32)];
memcpy(bytes, &key, sizeof(MwU32));
int i = 0;
for(i = 0; i < sizeof(MwU32); i++) {
if(( // ASCII
// use bytes[0] <= 0x7F to allow ASCII control characters
bytes[0] == 0x09 ||
bytes[0] == 0x0A ||
bytes[0] == 0x0D ||
(0x20 <= bytes[0] && bytes[0] <= 0x7E))) {
continue;
}
if(( // non-overlong 2-byte
(0xC2 <= bytes[0] && bytes[0] <= 0xDF) &&
(0x80 <= bytes[1] && bytes[1] <= 0xBF))) {
continue;
}
if(( // excluding overlongs
bytes[0] == 0xE0 &&
(0xA0 <= bytes[1] && bytes[1] <= 0xBF) &&
(0x80 <= bytes[2] && bytes[2] <= 0xBF)) ||
( // straight 3-byte
((0xE1 <= bytes[0] && bytes[0] <= 0xEC) ||
bytes[0] == 0xEE ||
bytes[0] == 0xEF) &&
(0x80 <= bytes[1] && bytes[1] <= 0xBF) &&
(0x80 <= bytes[2] && bytes[2] <= 0xBF)) ||
( // excluding surrogates
bytes[0] == 0xED &&
(0x80 <= bytes[1] && bytes[1] <= 0x9F) &&
(0x80 <= bytes[2] && bytes[2] <= 0xBF))) {
continue;
}
if(( // planes 1-3
bytes[0] == 0xF0 &&
(0x90 <= bytes[1] && bytes[1] <= 0xBF) &&
(0x80 <= bytes[2] && bytes[2] <= 0xBF) &&
(0x80 <= bytes[3] && bytes[3] <= 0xBF)) ||
( // planes 4-15
(0xF1 <= bytes[0] && bytes[0] <= 0xF3) &&
(0x80 <= bytes[1] && bytes[1] <= 0xBF) &&
(0x80 <= bytes[2] && bytes[2] <= 0xBF) &&
(0x80 <= bytes[3] && bytes[3] <= 0xBF)) ||
( // plane 16
bytes[0] == 0xF4 &&
(0x80 <= bytes[1] && bytes[1] <= 0x8F) &&
(0x80 <= bytes[2] && bytes[2] <= 0xBF) &&
(0x80 <= bytes[3] && bytes[3] <= 0xBF))) {
continue;
}
return 0;
}
return 1;
}