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


static struct {
	uint_least32_t cp;
	const char *s;
} symbols[] = {
	{UINT32_C(0x269E), "->"},
	{UINT32_C(0x269F), "<-"},
	{UINT32_C(0x2120), "SM"},
	{UINT32_C(0x2122), "TM"},
	{UINT32_C(0x00A9), "(C)"},
	{UINT32_C(0x1F1AD), "(M)"},
	{UINT32_C(0x2117), "(P)"},
	{UINT32_C(0x00AE), "(R)"},
	{UINT32_C(0x1F10D), "(0)"},
	{UINT32_C(0x1F10F), "\\($)"},
	{UINT32_C(0x1F10F), "(\\$)"},
	{UINT32_C(0x1F10F), "($\\)"},
	{UINT32_C(0x1F10F), "($)\\"},
	{UINT32_C(0x1F16E), "\\(C)"},
	{UINT32_C(0x1F16E), "(\\C)"},
	{UINT32_C(0x1F16E), "(C\\)"},
	{UINT32_C(0x1F16E), "(C)\\"},
	{UINT32_C(0x1F16D), "(CC)"},
	{UINT32_C(0x212E), "e"},
	{UINT32_C(0x2139), "i"},
	{UINT32_C(0x212A), "K"},
	{UINT32_C(0x213B), "FAX"},
	{UINT32_C(0x213B), "Fax"},
	{UINT32_C(0x2121), "TEL"},
	{UINT32_C(0x2121), "Tel"},
	{UINT32_C(0x212B), "A"},
	{UINT32_C(0x2100), "ac"},
	{UINT32_C(0x2100), "a/c"},
	{UINT32_C(0x214D), "AS"},
	{UINT32_C(0x214D), "A/S"},
	{UINT32_C(0x2101), "as"},
	{UINT32_C(0x2101), "a/s"},
	{UINT32_C(0x00AA), "a"},
	{UINT32_C(0x00BA), "o"},
	{UINT32_C(0x2300), "/o"},
	{UINT32_C(0x2300), "o/"},
	{UINT32_C(0x2116), "No"},
	{UINT32_C(0x2118), "p"},
	{UINT32_C(0x2118), "P"},
	{UINT32_C(0x214A), "PL"},
	{UINT32_C(0x211E), "Px"},
	{UINT32_C(0x211F), "R/"},
	{UINT32_C(0x211F), "/R"},
	{UINT32_C(0x2123), "V/"},
	{UINT32_C(0x2123), "/V"},
	{UINT32_C(0x2125), "z"},
	{UINT32_C(0x23E8), "10"},
	{UINT32_C(0x2104), "CL"},
	{UINT32_C(0x2105), "c/o"},
	{UINT32_C(0x2105), "co"},
	{UINT32_C(0x2105), "C/O"},
	{UINT32_C(0x2105), "CO"},
	{UINT32_C(0x2106), "c/u"},
	{UINT32_C(0x2106), "cu"},
	{UINT32_C(0x2106), "C/U"},
	{UINT32_C(0x2106), "CU"},
	{UINT32_C(0x2113), "l"},
	{UINT32_C(0x2114), "lb"},
	{UINT32_C(0x1F19B), "[3D]"},
	{UINT32_C(0x1F19B), "3D"},
	{UINT32_C(0x1F19C), "[2ND SCR]"},
	{UINT32_C(0x1F19C), "2ND SCR"},
	{UINT32_C(0x1F1A7), "[HDR]"},
	{UINT32_C(0x1F1A7), "HDR"},
	{UINT32_C(0x1F1A6), "[HC]"},
	{UINT32_C(0x1F1A6), "HC"},
	{UINT32_C(0x1F1AC), "[VOD]"},
	{UINT32_C(0x1F1AC), "VOD"},
	{UINT32_C(0x1F1A3), "[60P]"},
	{UINT32_C(0x1F1A3), "60P"},
	{UINT32_C(0x1F1A8), "[HI-RES]"},
	{UINT32_C(0x1F1A8), "HI-RES"},
	{UINT32_C(0x1F1A4), "[120P]"},
	{UINT32_C(0x1F1A4), "120P"},
	{UINT32_C(0x1F19D), "[2K]"},
	{UINT32_C(0x1F19D), "2K"},
	{UINT32_C(0x1F19E), "[4K]"},
	{UINT32_C(0x1F19E), "4K"},
	{UINT32_C(0x1F19F), "[8K]"},
	{UINT32_C(0x1F19F), "8K"},
	{UINT32_C(0x1F1AB), "[UHD]"},
	{UINT32_C(0x1F1AB), "UHD"},
	{UINT32_C(0x1F1AA), "[SHV]"},
	{UINT32_C(0x1F1AA), "SHV"},
	{UINT32_C(0x1F1A9), "[LOSSLESS]"},
	{UINT32_C(0x1F1A9), "LOSSLESS"},
	{UINT32_C(0x1F1A0), "[5.1]"},
	{UINT32_C(0x1F1A0), "5.1"},
	{UINT32_C(0x1F1A1), "[7.1]"},
	{UINT32_C(0x1F1A1), "7.1"},
	{UINT32_C(0x1F1A2), "[22.2]"},
	{UINT32_C(0x1F1A2), "22.2"},
	{UINT32_C(0x2141), "G"},
	{UINT32_C(0x2142), "L"},
	{UINT32_C(0x2144), "Y"},
	{UINT32_C(0x213A), "Q"}
};


enum libcharconv_result
libcharconv_symbols(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
	size_t i, len, found, found_len;
	int indeterminate;
	*n = 0;
	for (; slen; s++, slen--, ++*n) {
		indeterminate = 0;
		found = SIZE_MAX;
		found_len = 0u;
		for (i = 0u; i < sizeof(symbols) / sizeof(*symbols); i++) {
			len = strlen(symbols[i].s);
			if (strncmp(s, symbols[i].s, len < slen ? len : slen))
				continue;
			if (slen < len) {
				indeterminate = 1;
				continue;
			}
			if (len > found_len) {
				found = i;
				found_len = len;
			}
		}
		if (found_len)
			goto conv;
		if (*n)
			goto no_conv;
		if (indeterminate)
			return LIBCHARCONV_INDETERMINATE;
	}
no_conv:
	return LIBCHARCONV_NO_CONVERT;

conv:
	if (*n)
		goto no_conv;
	if (*ncp)
		*cp = symbols[found].cp;
	*n += found_len;
	*ncp = 1u;
	return indeterminate ? LIBCHARCONV_CONVERT_IF_END : LIBCHARCONV_CONVERTED;
}