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


enum libcharconv_result
libcharconv_rumi(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
	uint_least32_t c;
	*n = 0;
	for (; slen--; s++) {
		if ('1' <= *s && *s <= '9') {
			if (*n)
				goto no_conv;
			c = UINT32_C(0x10E60) + (uint_least32_t)(*s - '1');
			*n = 1u;
			if (slen == 0u)
				goto conv_if_end;
			if (s[0] == '1' && s[1] == '/') {
				if (slen == 1u)
					return LIBCHARCONV_INDETERMINATE;
				if (s[2] == '2') {
					*n += 2u;
					c = UINT32_C(0x10E7B);
				} else if (s[2] == '4') {
					*n += 2u;
					c = UINT32_C(0x10E7C);
				} else if (s[2] == '3') {
					*n += 2u;
					c = UINT32_C(0x10E7D);
				}
				goto conv;
			} else if (s[0] == '2' && s[1] == '/') {
				if (slen == 1u)
					return LIBCHARCONV_INDETERMINATE;
				if (s[2] == '3') {
					*n += 2u;
					c = UINT32_C(0x10E7E);
				}
				goto conv;
			}
			if (s[1] != '0')
				goto conv;
			c += 9u;
			*n += 1u;
			if (slen == 1u)
				goto conv_if_end;
			if (s[2] == '0') {
				c += 9u;
				*n += 1u;
			}
			goto conv;
		} else {
			*n += 1u;
		}
	}
no_conv:
	return LIBCHARCONV_NO_CONVERT;

conv:
	if (*ncp)
		*cp = c;
	*ncp = 1u;
	return LIBCHARCONV_CONVERTED;
conv_if_end:
	if (*ncp)
		*cp = c;
	*ncp = 1u;
	return LIBCHARCONV_CONVERT_IF_END;
}