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#include "mbstring.h"
#include "unicode/prop.h"
#include "unicode/string.h"
size_t
u8upper(char8_t *restrict dst, size_t dstn, const char8_t *src, size_t srcn,
enum caseflags flags)
{
struct ucctx ctx = {
.az_or_tr = flags & CF_LANG_AZ,
.lt = flags & CF_LANG_LT,
.ẞ = flags & CF_ẞ,
};
rune ch;
size_t n = 0;
while (u8next(&ch, &src, &srcn)) {
struct rview rv = uprop_get_uc(ch, ctx);
for (size_t i = 0; i < rv.len; i++) {
if (n >= dstn) {
char8_t buf[U8_LEN_MAX];
n += rtou8(buf, sizeof(buf), rv.p[i]);
} else
n += rtou8(dst + n, dstn - n, rv.p[i]);
}
ctx.after_i = ch == 'i';
}
return n;
}
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