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


static struct {
#ifndef REVERSED
# define FUNC_NAME libcharconv_rotated_90deg_cw
	uint_least32_t from;
	uint_least32_t to;
#else
# define FUNC_NAME libcharconv_rotated_90deg_ccw
	uint_least32_t to;
	uint_least32_t from;
#endif
} pairs[] = {
	CYCLE_4(0x230E, 0x230C, 0x230D, 0x230F),
	CYCLE_4(0x1FA04, 0x1FA19, 0x1FA2E, 0x1FA43),
	CYCLE_4(0x02658, 0x1FA0D, 0x1FA22, 0x1FA37),
	CYCLE_4(0x0265E, 0x1FA13, 0x1FA28, 0x1FA3D),
	CYCLE_4(0x1FA08, 0x1FA1D, 0x1FA32, 0x1FA47),
	CYCLE_4(0x1FA06, 0x1FA1B, 0x1FA30, 0x1FA45),
	CYCLE_4(0x1FA07, 0x1FA1C, 0x1FA31, 0x1FA46),
	CYCLE_2(0x1FA48, 0x1FA4B),
	CYCLE_2(0x1FA49, 0x1FA4C),
	CYCLE_2(0x1FA4A, 0x1FA4D),
	CYCLE_4(0x1FA00, 0x1FA15, 0x1FA2A, 0x1FA3F),
	CYCLE_4(0x1FA01, 0x1FA16, 0x1FA2B, 0x1FA40),
	CYCLE_4(0x1FA02, 0x1FA17, 0x1FA2C, 0x1FA41),
	CYCLE_4(0x1FA03, 0x1FA18, 0x1FA2D, 0x1FA42),
	CYCLE_4(0x1FA05, 0x1FA1A, 0x1FA2F, 0x1FA44),
	CYCLE_4(0x2654, 0x1FA09, 0x1FA1E, 0x1FA33),
	CYCLE_4(0x2655, 0x1FA0A, 0x1FA1F, 0x1FA34),
	CYCLE_4(0x2656, 0x1FA0B, 0x1FA20, 0x1FA35),
	CYCLE_4(0x2657, 0x1FA0C, 0x1FA21, 0x1FA36),
	CYCLE_4(0x2659, 0x1FA0E, 0x1FA23, 0x1FA38),
	CYCLE_4(0x265A, 0x1FA0F, 0x1FA24, 0x1FA39),
	CYCLE_4(0x265B, 0x1FA10, 0x1FA25, 0x1FA3A),
	CYCLE_4(0x265C, 0x1FA11, 0x1FA26, 0x1FA3B),
	CYCLE_4(0x265D, 0x1FA12, 0x1FA27, 0x1FA3C),
	CYCLE_4(0x265F, 0x1FA14, 0x1FA29, 0x1FA3E),
	{UINT32_C(0x213A), (uint_least32_t)'Q'},
	CYCLE_4(0x1FBA0, 0x1FBA1, 0x1FBA3, 0x1FBA2),
	CYCLE_4(0x1FBAA, 0x1FBAB, 0x1FBAD, 0x1FBAC),
	CYCLE_4(0x1FBA4, 0x1FBA7, 0x1FBA5, 0x1FBA6),
	CYCLE_2(0x1FBA8, 0x1FBA9),
	CYCLE_2(0x2500, 0x2502),
	CYCLE_2(0x2501, 0x2503),
	CYCLE_2(0x2504, 0x2506),
	CYCLE_2(0x2505, 0x2507),
	CYCLE_2(0x2508, 0x250A),
	CYCLE_2(0x2509, 0x250B),
	CYCLE_4(0x250C, 0x2510, 0x2518, 0x2514),
	CYCLE_4(0x250D, 0x2511, 0x2519, 0x2515),
	CYCLE_4(0x250E, 0x2512, 0x251A, 0x2516),
	CYCLE_4(0x250F, 0x2513, 0x251B, 0x2517),
	CYCLE_4(0x251F, 0x252D, 0x2526, 0x2536),
	CYCLE_4(0x2522, 0x2531, 0x2529, 0x253A),
	CYCLE_4(0x2527, 0x2535, 0x251E, 0x252E),
	CYCLE_4(0x252A, 0x2539, 0x2521, 0x2532),
	CYCLE_4(0x2534, 0x251C, 0x252C, 0x2524),
	CYCLE_4(0x2537, 0x251D, 0x252F, 0x2525),
	CYCLE_4(0x2538, 0x2520, 0x2530, 0x2528),
	CYCLE_4(0x253B, 0x2523, 0x2533, 0x252B),
	CYCLE_2(0x253F, 0x2542),
	CYCLE_4(0x2541, 0x253D, 0x2540, 0x253E),
	CYCLE_4(0x2546, 0x2545, 0x2543, 0x2544),
	CYCLE_4(0x2548, 0x2549, 0x2547, 0x254A),
	CYCLE_2(0x254C, 0x254E),
	CYCLE_2(0x254D, 0x254F),
	CYCLE_2(0x2550, 0x2551),
	CYCLE_4(0x2552, 0x2556, 0x255B, 0x2559),
	CYCLE_4(0x2553, 0x2555, 0x255C, 0x2558),
	CYCLE_4(0x2554, 0x2557, 0x255D, 0x255A),
	CYCLE_4(0x255E, 0x2565, 0x2561, 0x2568),
	CYCLE_4(0x2564, 0x2562, 0x2567, 0x255F),
	CYCLE_4(0x2566, 0x2563, 0x2569, 0x2560),
	CYCLE_2(0x256A, 0x256B),
	CYCLE_4(0x256D, 0x256E, 0x256F, 0x2570),
	CYCLE_4(0x2574, 0x2575, 0x2576, 0x2577),
	CYCLE_4(0x2578, 0x2579, 0x257A, 0x257B),
	CYCLE_4(0x257C, 0x257D, 0x257E, 0x257F),
};


enum libcharconv_result
FUNC_NAME(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
	uint_least32_t c;
	size_t i, clen;
	*n = 0;
	while (slen) {
		clen = libcharconv_decode_utf8_(s, slen, &c);
		if (clen > slen) {
			if (*n)
				goto no_conv;
			return LIBCHARCONV_INDETERMINATE;
		}
		if (!clen) {
			*n += 1u;
			slen -= 1u;
			s = &s[1];
			continue;
		}

		for (i = 0u; i < sizeof(pairs) / sizeof(*pairs); i++) {
			if (c == pairs[i].from) {
				c = pairs[i].to;
				goto conv;
			}
		}

		*n += clen;
		s = &s[clen];
		slen -= clen;
	}
no_conv:
	return LIBCHARCONV_NO_CONVERT;

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