1 files changed, 43 insertions, 0 deletions
diff --git a/src/u8c/str.h.d/strfndpat.c b/src/u8c/str.h.d/strfndpat.c
new file mode 100644
index 0000000..1091238
--- /dev/null
+++ b/src/u8c/str.h.d/strfndpat.c
@@ -0,0 +1,43 @@
+/*
+	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/SIZE_C.h>
+# include <u8c/err.h>
+# include <u8c/str.h>
+struct u8c_strfndpat_tuple u8c_strfndpat(char32_t const * const restrict _in,char32_t const * const restrict _pat) {
+	struct u8c_strfndpat_tuple ret = {
+		.stat = false,
+	};
+	size_t insz  = u8c_strsz(_in).sz;
+	size_t patsz = u8c_strsz(_pat).sz;
+	if(insz == SIZE_C(0x1) || insz < patsz) {
+		ret.pos = SIZE_C(-0x1);
+		return ret;
+	}
+	for(register size_t n = SIZE_C(0x0);n < insz - patsz;n += SIZE_C(0x1)) {
+		char32_t const *    str    = u8c_strsubstr(n,patsz - SIZE_C(0x1),_in).str;
+		uint_least8_t const cmpres = u8c_strcmp(str,_pat).res;
+		u8c_strfree(str);
+		if(cmpres == UINT8_C(0x1)) {
+			ret.pos = n;
+			return ret;
+		}
+	}
+	ret.pos = SIZE_C(-0x1);
+	return ret;
+}