Add flipping and turning for yijing n-grams, and add invisible

Signed-off-by: Mattias Andrée <m@maandree.se>

1 files changed, 44 insertions, 2 deletions

diff --git a/libcharconv_flipped.c b/libcharconv_flipped.c
index fd47f99..f015c99 100644
--- a/libcharconv_flipped.c
+++ b/libcharconv_flipped.c
@@ -2,6 +2,18 @@
 #include "lib-common.h"
 
 
+static unsigned char yijing_hexagrams[] = {
+	0xC0, 0xEB, 0xCC, 0xE0, 0xC9, 0xC5, 0xD8, 0xCB,
+	0xC8, 0xF8, 0xE4, 0xF4, 0xFC, 0xFA, 0xE9, 0xD3,
+	0xCD, 0xF1, 0xDD, 0xF7, 0xE5, 0xFF, 0xD4, 0xE2,
+	0xD9, 0xD1, 0xD5, 0xF3, 0xE8, 0xC3, 0xDA, 0xD6,
+	0xEA, 0xDB, 0xF0, 0xDE, 0xF9, 0xEE, 0xD0, 0xEC,
+	0xC4, 0xEF, 0xFE, 0xE6, 0xFB, 0xDC, 0xC2, 0xC7,
+	0xE1, 0xDF, 0xF6, 0xFD, 0xF5, 0xE7, 0xF2, 0xCF,
+	0xCA, 0xED, 0xE3, 0xCE, 0xD2, 0xC6, 0xD7, 0xC1
+};
+
+
 static struct {
 	uint_least32_t a;
 	uint_least32_t b;
@@ -13,14 +25,17 @@ static struct {
 	{UINT32_C(0xA4E5), (uint_least32_t)'V'},
 	{UINT32_C(0x1D5B8), UINT32_C(0x2144)},
 	{UINT32_C(0x230D), UINT32_C(0x230F)},
-	{UINT32_C(0x230C), UINT32_C(0x230E)}
+	{UINT32_C(0x230C), UINT32_C(0x230E)},
+	{UINT32_C(0x268E), UINT32_C(0x268D)},
+	{UINT32_C(0x1D301), UINT32_C(0x1D303)},
+	{UINT32_C(0x1D302), UINT32_C(0x1D304)}
 };
 
 
 enum libcharconv_result
 libcharconv_flipped(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
 {
-	uint_least32_t c;
+	uint_least32_t c, x1, x2, x3, x4;
 	size_t i, clen;
 	*n = 0;
 	while (slen) {
@@ -42,6 +57,33 @@ libcharconv_flipped(const char *s, size_t slen, size_t *n, uint_least32_t *cp, s
 			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) == 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) | yijing_hexagrams[c];
+			goto conv;
 		} else {
 			for (i = 0u; i < sizeof(pairs) / sizeof(*pairs); i++) {
 				if (c == pairs[i].a) {