/* See LICENSE file for copyright and license details. */
#include "lib-common.h"


enum libcharconv_result
libcharconv_buginese(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
	uint_least32_t c, c2;
	*n = 0;
	for (; slen--; s++) {
		PLAIN_SELECT("kgGKpbmMtdnRcjYCyrlvs", 0x1A00);
		PLAIN_SINGLE('h', 0x1A16);
		switch (s[0]) {
		case 'a': c = UINT32_C(0x1A15); goto conv1;
		case 'i': c = UINT32_C(0x1A17); goto conv_vowel;
		case 'u': c = UINT32_C(0x1A18); goto conv_vowel;
		case 'e': c = UINT32_C(0x1A19); goto conv_vowel;
		case 'o': c = UINT32_C(0x1A1A); goto conv_vowel;
		case 'A': c = UINT32_C(0x1A1B); goto conv_vowel;
		case '.': c = UINT32_C(0x1A1E); goto conv1;
		case '|': c = UINT32_C(0x1A1F); goto conv1;
		case '^':
			if (!slen)
				return LIBCHARCONV_INDETERMINATE;
			switch (s[1]) {
			case 'i': c = UINT32_C(0x1A17); goto conv2;
			case 'u': c = UINT32_C(0x1A18); goto conv2;
			case 'e': c = UINT32_C(0x1A19); goto conv2;
			case 'o': c = UINT32_C(0x1A1A); goto conv2;
			case 'A': c = UINT32_C(0x1A1B); goto conv2;
			default:
				goto no_match;
			}
		default:
		no_match:
			*n += 1u;
			break;
		}
	}
no_conv:
	return LIBCHARCONV_NO_CONVERT;

conv:
	if (*n)
		goto no_conv;
	if (!slen)
		return LIBCHARCONV_INDETERMINATE;
	switch (s[1]) {
	case 'a': goto conv2;
	case 'i': c2 = UINT32_C(0x1A17); break;
	case 'u': c2 = UINT32_C(0x1A18); break;
	case 'e': c2 = UINT32_C(0x1A19); break;
	case 'o': c2 = UINT32_C(0x1A1A); break;
	case 'A': c2 = UINT32_C(0x1A1B); break;
	default:
		goto no_match;
	}
	if (*ncp >= 1u)
		cp[0] = c;
	if (*ncp >= 2u)
		cp[1] = c2;
	*n += 2u;
	*ncp = 2u;
	return LIBCHARCONV_CONVERTED;

conv1:
	if (*n)
		goto no_conv;
	if (*ncp)
		*cp = c;
	*n += 1u;
	*ncp = 1u;
	return LIBCHARCONV_CONVERTED;

conv2:
	if (*n)
		goto no_conv;
	if (*ncp)
		cp[0] = c;
	*n += 2u;
	*ncp = 1u;
	return LIBCHARCONV_CONVERTED;

conv_vowel:
	if (*n)
		goto no_conv;
	if (*ncp >= 1u)
		cp[0] = UINT32_C(0x1A15);
	if (*ncp >= 2u)
		cp[1] = c;
	*n += 1u;
	*ncp = 2u;
	return LIBCHARCONV_CONVERTED;
}