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


enum libcharconv_result
libcharconv_scores(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 (*s == '1') {
			if (*n)
				goto no_conv;
			if (!slen)
				return LIBCHARCONV_INDETERMINATE;
			if (s[1] != '0')
				goto no_match;
			*n = 2u;
			c = UINT32_C(0x1F51F);
			if (slen == 1u)
				goto conv_if_end;
			if (s[2] == '0') {
				*n += 1u;
				c = UINT32_C(0x1F4AF);
			}
			goto conv;
		} else if (*s == '*') {
			if (*n)
				goto no_conv;
			*n = 1u;
			c = UINT32_C(0x1F4AE);
			goto conv;
		} else {
		no_match:
			*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;
}