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path: root/libcharconv_turned.c
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/* See LICENSE file for copyright and license details. */
#include "lib-common.h"


static struct {
	uint_least32_t a;
	uint_least32_t b;
} pairs[] = {
	{UINT32_C(0x0032), UINT32_C(0x218A)},
	{UINT32_C(0x0033), UINT32_C(0x218B)},
	{UINT32_C(0x2616), UINT32_C(0x26C9)},
	{UINT32_C(0x2617), UINT32_C(0x26CA)},
	{UINT32_C(0x0021), UINT32_C(0x00A1)},
	{UINT32_C(0x003F), UINT32_C(0x00BF)},
	{UINT32_C(0x2E35), UINT32_C(0x003B)},
	{UINT32_C(0x203D), UINT32_C(0x2E18)},
	{UINT32_C(0xA4EF), (uint_least32_t)'A'},
	{UINT32_C(0xA4ED), (uint_least32_t)'B'},
	{UINT32_C(0xA4DB), (uint_least32_t)'C'},
	{UINT32_C(0xA4F7), (uint_least32_t)'D'},
	{UINT32_C(0xA4F1), (uint_least32_t)'E'},
	{UINT32_C(0xA4DE), (uint_least32_t)'F'}, /* there is a letterlike alternative */
	{UINT32_C(0x2132), (uint_least32_t)'F'}, /* secondary alternative */
	{UINT32_C(0xA4E8), (uint_least32_t)'G'}, /* the one in letterlike is sans-serif */
	{UINT32_C(0xA4E9), (uint_least32_t)'J'},
	{UINT32_C(0xA4D8), (uint_least32_t)'K'},
	{UINT32_C(0xA4F6), (uint_least32_t)'L'}, /* the one in letterlike is sans-serif */
	{UINT32_C(0xA4D2), (uint_least32_t)'P'},
	{UINT32_C(0xA4E4), (uint_least32_t)'R'},
	{UINT32_C(0xA4D5), (uint_least32_t)'Y'}, /* the one in letterlike is sans-serif */
	{UINT32_C(0xA4F5), (uint_least32_t)'U'},
	{UINT32_C(0xA4E5), (uint_least32_t)'V'},
	{UINT32_C(0x1D5A6), UINT32_C(0x2141)},
	{UINT32_C(0x1D5AB), UINT32_C(0x2142)},
	{UINT32_C(0x1D5B8), UINT32_C(0x2144)},
	{UINT32_C(0x1F12F), UINT32_C(0x00A9)},
	{UINT32_C(0x230C), UINT32_C(0x230F)},
	{UINT32_C(0x230E), UINT32_C(0x230D)},
	{UINT32_C(0x268E), UINT32_C(0x268D)},
	{UINT32_C(0x1D301), UINT32_C(0x1D303)},
	{UINT32_C(0x1D302), UINT32_C(0x1D304)},
	{UINT32_C(0x23BE), UINT32_C(0x23CC)},
	{UINT32_C(0x23CB), UINT32_C(0x23BF)},
	{UINT32_C(0x23C9), UINT32_C(0x23CA)},
	{UINT32_C(0x23C1), UINT32_C(0x23C2)},
	{UINT32_C(0x23C7), UINT32_C(0x23C8)},
	{UINT32_C(0x238F), UINT32_C(0x2390)},
	{UINT32_C(0x2391), UINT32_C(0x2392)},
	{UINT32_C(0x169B), UINT32_C(0x169C)},
	{UINT32_C(0x1FBA0), UINT32_C(0x1FBA3)},
	{UINT32_C(0x1FBA2), UINT32_C(0x1FBA1)},
	{UINT32_C(0x1FBA4), UINT32_C(0x1FBA5)},
	{UINT32_C(0x1FBAA), UINT32_C(0x1FBAD)},
	{UINT32_C(0x1FBAC), UINT32_C(0x1FBAB)},
	{UINT32_C(0x250C), UINT32_C(0x2518)},
	{UINT32_C(0x250D), UINT32_C(0x2519)},
	{UINT32_C(0x250E), UINT32_C(0x251A)},
	{UINT32_C(0x250F), UINT32_C(0x251B)},
	{UINT32_C(0x2510), UINT32_C(0x2514)},
	{UINT32_C(0x2511), UINT32_C(0x2515)},
	{UINT32_C(0x2512), UINT32_C(0x2516)},
	{UINT32_C(0x2513), UINT32_C(0x2517)},
	{UINT32_C(0x251C), UINT32_C(0x2524)},
	{UINT32_C(0x251D), UINT32_C(0x2525)},
	{UINT32_C(0x251F), UINT32_C(0x2526)},
	{UINT32_C(0x2520), UINT32_C(0x2528)},
	{UINT32_C(0x2522), UINT32_C(0x2529)},
	{UINT32_C(0x2523), UINT32_C(0x252B)},
	{UINT32_C(0x2527), UINT32_C(0x251E)},
	{UINT32_C(0x252A), UINT32_C(0x2521)},
	{UINT32_C(0x252C), UINT32_C(0x2534)},
	{UINT32_C(0x252D), UINT32_C(0x2536)},
	{UINT32_C(0x252E), UINT32_C(0x2535)},
	{UINT32_C(0x252F), UINT32_C(0x2537)},
	{UINT32_C(0x2530), UINT32_C(0x2538)},
	{UINT32_C(0x2531), UINT32_C(0x253A)},
	{UINT32_C(0x2532), UINT32_C(0x2539)},
	{UINT32_C(0x2533), UINT32_C(0x253B)},
	{UINT32_C(0x253E), UINT32_C(0x253D)},
	{UINT32_C(0x2540), UINT32_C(0x2541)},
	{UINT32_C(0x2545), UINT32_C(0x2544)},
	{UINT32_C(0x2546), UINT32_C(0x2543)},
	{UINT32_C(0x2547), UINT32_C(0x2548)},
	{UINT32_C(0x254A), UINT32_C(0x2549)},
	{UINT32_C(0x2552), UINT32_C(0x255B)},
	{UINT32_C(0x2553), UINT32_C(0x255C)},
	{UINT32_C(0x2554), UINT32_C(0x255D)},
	{UINT32_C(0x2555), UINT32_C(0x2558)},
	{UINT32_C(0x2556), UINT32_C(0x2559)},
	{UINT32_C(0x2557), UINT32_C(0x255A)},
	{UINT32_C(0x255E), UINT32_C(0x2561)},
	{UINT32_C(0x255F), UINT32_C(0x2562)},
	{UINT32_C(0x2560), UINT32_C(0x2563)},
	{UINT32_C(0x2564), UINT32_C(0x2567)},
	{UINT32_C(0x2565), UINT32_C(0x2568)},
	{UINT32_C(0x2566), UINT32_C(0x2569)},
	{UINT32_C(0x256D), UINT32_C(0x256F)},
	{UINT32_C(0x256E), UINT32_C(0x2570)},
	{UINT32_C(0x2574), UINT32_C(0x2576)},
	{UINT32_C(0x2575), UINT32_C(0x2577)},
	{UINT32_C(0x2578), UINT32_C(0x257A)},
	{UINT32_C(0x2579), UINT32_C(0x257B)},
	{UINT32_C(0x257C), UINT32_C(0x257E)},
	{UINT32_C(0x257D), UINT32_C(0x257F)},
	{UINT32_C(0x2E34), UINT32_C(0x2E32)}
};


enum libcharconv_result
libcharconv_turned(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
{
	uint_least32_t c, x1, x2, x3, x4;
	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;
		}

		PLAIN_RANGE_SWAP(0x1FA00, 0x1FA1D, 0x1FA2A, 0x1FA47);
		PLAIN_RANGE_SWAP(0x1FA1E, 0x1FA29, 0x2654, 0x265F);
		if (UINT32_C(0x1F031) <= c && c <= UINT32_C(0x1F061)) {
			c -= UINT32_C(0x1F031);
			c = c % 7u * 7u + c / 7u;
			c += UINT32_C(0x1F031);
			goto conv;
		} else if (UINT32_C(0x1F063) <= c && c <= UINT32_C(0x1F093)) {
			c -= UINT32_C(0x1F063);
			c = c % 7u * 7u + c / 7u;
			c += UINT32_C(0x1F063);
			goto conv;
		} else if (UINT32_C(0x2630) <= c && c <= UINT32_C(0x2637)) {
			c = ((c & 1u) << 2) | ((c & 4u) >> 2) | (c & ~5u);
			goto conv;
		} else if (UINT32_C(0x1D306) <= c && c <= UINT32_C(0x1D356)) {
			c -= UINT32_C(0x1D306);
			x1 = c /  1u % 3u;
			x2 = c /  3u % 3u;
			x3 = c /  9u % 3u;
			x4 = c / 27u % 3u;
			c = UINT32_C(0x1D306);
			c += x4 *  1u;
			c += x3 *  3u;
			c += x2 *  9u;
			c += x1 * 27u;
			goto conv;
		} else if (UINT32_C(0x4DC0) <= c && c <= UINT32_C(0x4DFF)) {
			for (i = 0u;; i++)
				if ((c & 0xFFu) == libcharconv_yijing_hexagrams_[i])
					break;
			c =  (i & 32u) ?  1u : 0u;
			c |= (i & 16u) ?  2u : 0u;
			c |= (i &  8u) ?  4u : 0u;
			c |= (i &  4u) ?  8u : 0u;
			c |= (i &  2u) ? 16u : 0u;
			c |= (i &  1u) ? 32u : 0u;
			c = UINT32_C(0x4D00) | libcharconv_yijing_hexagrams_[c];
			goto conv;
		} else if (UINT32_C(0x2800) <= c && c <= UINT32_C(0x28FF)) {
			c = ((c & 0x01u) << 7) | ((c & 0x80u) >> 7)
			  | ((c & 0x02u) << 4) | ((c & 0x20u) >> 4)
			  | ((c & 0x04u) << 2) | ((c & 0x10u) >> 2)
			  | ((c & 0x08u) << 3) | ((c & 0x40u) >> 3)
			  | UINT32_C(0x2800);
			goto conv;
		} else if (UINT32_C(0x1681) <= c && c <= UINT32_C(0x1685)) {
			c += 5u;
			goto conv;
		} else if (UINT32_C(0x1686) <= c && c <= UINT32_C(0x168A)) {
			c -= 5u;
			goto conv;
		} else {
			for (i = 0u; i < sizeof(pairs) / sizeof(*pairs); i++) {
				if (c == pairs[i].a) {
					c = pairs[i].b;
					goto conv;
				}
				if (c == pairs[i].b) {
					c = pairs[i].a;
					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;
}