1 files changed, 91 insertions, 0 deletions
diff --git a/libcharconv_gothic.c b/libcharconv_gothic.c
new file mode 100644
index 0000000..61ec9a9
--- /dev/null
+++ b/libcharconv_gothic.c
@@ -0,0 +1,91 @@
+/* See LICENSE file for copyright and license details. */
+#include "lib-common.h"
+
+
+static struct {
+	unsigned char cp_low;
+	char latin;
+} gothic[] = {
+	{0x30, 'a'},
+	{0x31, 'b'},
+	{0x32, 'g'},
+	{0x32, 'G'},
+	{0x33, 'd'},
+	{0x33, 'D'},
+	{0x34, 'e'},
+	{0x35, 'q'},
+	{0x36, 'z'},
+	{0x37, 'h'},
+	{0x38, 'T'},
+	{0x39, 'i'},
+	{0x3A, 'k'},
+	{0x3B, 'l'},
+	{0x3C, 'm'},
+	{0x3D, 'n'},
+	{0x3E, 'j'},
+	{0x3F, 'u'},
+	{0x40, 'p'},
+	{0x42, 'r'},
+	{0x43, 's'},
+	{0x44, 't'},
+	{0x45, 'w'},
+	{0x45, 'y'},
+	{0x46, 'f'},
+	{0x47, 'x'},
+	{0x48, 'v'},
+	{0x48, 'W'},
+	{0x49, 'o'}
+};
+
+
+enum libcharconv_result
+libcharconv_gothic(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
+{
+	uint_least32_t c;
+	size_t i;
+	*n = 0;
+	for (; slen--; s++) {
+		if ('1' <= *s && *s <= '9') {
+			if (*n)
+				goto no_conv;
+			c = UINT32_C(0x10330) + (uint_least32_t)(*s - '1');
+			*n = 1u;
+			if (slen == 0u)
+				goto convn_if_end;
+			if (s[1] != '0')
+				goto convn;
+			c += 9u;
+			*n += 1u;
+			if (slen == 1u)
+				goto convn_if_end;
+			if (s[2] == '0') {
+				c += 9u;
+				*n += 1u;
+			}
+			goto convn;
+		} else {
+			for (i = 0u; i < sizeof(gothic) / sizeof(*gothic); i++)
+				if (*s == gothic[i].latin)
+					goto conv;
+			*n += 1u;
+		}
+	}
+no_conv:
+	return LIBCHARCONV_NO_CONVERT;
+
+conv:
+	if (*n)
+		goto no_conv;
+	*n += 1u;
+	c = (uint_least32_t)(UINT32_C(0x10300) | gothic[i].cp_low);
+convn:
+	if (*ncp)
+		*cp = c;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERTED;
+convn_if_end:
+	if (*ncp)
+		*cp = c;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERT_IF_END;
+}