1 files changed, 69 insertions, 0 deletions
diff --git a/libcharconv_rumi.c b/libcharconv_rumi.c
new file mode 100644
index 0000000..ccd9203
--- /dev/null
+++ b/libcharconv_rumi.c
@@ -0,0 +1,69 @@
+/* See LICENSE file for copyright and license details. */
+#include "lib-common.h"
+
+
+enum libcharconv_result
+libcharconv_rumi(const char *s, size_t slen, size_t *n, uint_least32_t *cp, size_t *ncp)
+{
+	uint_least32_t c;
+	*n = 0;
+	for (; slen--; s++) {
+		if ('1' <= *s && *s <= '9') {
+			if (*n)
+				goto no_conv;
+			c = UINT32_C(0x10E60) + (uint_least32_t)(*s - '1');
+			*n = 1u;
+			if (slen == 0u)
+				goto conv_if_end;
+			if (s[0] == '1' && s[1] == '/') {
+				if (slen == 1u)
+					return LIBCHARCONV_INDETERMINATE;
+				if (s[2] == '2') {
+					*n += 2u;
+					c = UINT32_C(0x10E7B);
+				} else if (s[2] == '4') {
+					*n += 2u;
+					c = UINT32_C(0x10E7C);
+				} else if (s[2] == '3') {
+					*n += 2u;
+					c = UINT32_C(0x10E7D);
+				}
+				goto conv;
+			} else if (s[0] == '2' && s[1] == '/') {
+				if (slen == 1u)
+					return LIBCHARCONV_INDETERMINATE;
+				if (s[2] == '3') {
+					*n += 2u;
+					c = UINT32_C(0x10E7E);
+				}
+				goto conv;
+			}
+			if (s[1] != '0')
+				goto conv;
+			c += 9u;
+			*n += 1u;
+			if (slen == 1u)
+				goto conv_if_end;
+			if (s[2] == '0') {
+				c += 9u;
+				*n += 1u;
+			}
+			goto conv;
+		} else {
+			*n += 1u;
+		}
+	}
+no_conv:
+	return LIBCHARCONV_NO_CONVERT;
+
+conv:
+	if (*ncp)
+		*cp = c;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERTED;
+conv_if_end:
+	if (*ncp)
+		*cp = c;
+	*ncp = 1u;
+	return LIBCHARCONV_CONVERT_IF_END;
+}