1 files changed, 44 insertions, 0 deletions
diff --git a/src/u8c/chk.h.d/isdigit.c b/src/u8c/chk.h.d/isdigit.c
new file mode 100644
index 0000000..61665cf
--- /dev/null
+++ b/src/u8c/chk.h.d/isdigit.c
@@ -0,0 +1,44 @@
+/*
+	Copyright 2021 Gabriel Jensen
+
+	This file is part of u8c.
+
+	u8c is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+
+	u8c is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+	See the	GNU Affero General Public License for more details.
+
+	You should have received a copy of the GNU Affero General Public License along with u8c.
+
+	If not, see <https://www.gnu.org/licenses/>.
+*/
+# include <stdbool.h>
+# include <stddef.h>
+# include <stdint.h>
+# include <u8c/chk.h>
+struct u8c_isdigit_tuple u8c_isdigit(char32_t const _chr) {
+	struct u8c_isdigit_tuple ret = {
+		.stat = false,
+	};
+	switch(_chr) {
+	default:
+		ret.res = false;
+		break;
+	case U'0':      /* DIGIT ZERO */
+	case U'1':      /* DIGIT ONE */
+	case U'2':      /* DIGIT TWO */
+	case U'3':      /* DIGIT THREE */
+	case U'4':      /* DIGIT FOUR */
+	case U'5':      /* DIGIT FIVE */
+	case U'6':      /* DIGIT SIX */
+	case U'7':      /* DIGIT SEVEN */
+	case U'8':      /* DIGIT EIGHT */
+	case U'9':      /* DIGIT NINE */
+	case U'\u218A': /* TURNED DIGIT TWO */
+	case U'\u218B': /* TURNED DIGIT THREE */
+		ret.res = true;
+		break;
+	}
+	return ret;
+}