From 4206d6dee581dd9571324e1c07bac60171f03cd4 Mon Sep 17 00:00:00 2001
From: dtb <trinity@trinity.moe>
Date: Sun, 18 Sep 2022 10:53:17 -0400
Subject: [PATCH] strlen(3) strnlen(3)

---
 cstdlib/string.c | 17 +++++++++++++++++
 cstdlib/string.h |  5 +++++
 2 files changed, 22 insertions(+)
 create mode 100644 cstdlib/string.c
 create mode 100644 cstdlib/string.h

diff --git a/cstdlib/string.c b/cstdlib/string.c
new file mode 100644
index 0000000..7101922
--- /dev/null
+++ b/cstdlib/string.c
@@ -0,0 +1,17 @@
+size_t
+strlen(const char *s){
+	size_t r;
+
+	for(r = 0; s[r] != '\0'; ++r);
+
+	return r;
+}
+
+size_t
+strnlen(const char *s, size_t maxlen){
+	size_t r;
+
+	for(r = 0; s[r] != '\0' && r < maxlen; ++r);
+
+	return r;
+}
diff --git a/cstdlib/string.h b/cstdlib/string.h
new file mode 100644
index 0000000..50353f6
--- /dev/null
+++ b/cstdlib/string.h
@@ -0,0 +1,5 @@
+#ifndef _STRING_H
+#	define _STRING_H
+size_t strlen(const char *s);
+size_t strnlen(const char *s, size_t maxlen);
+#endif /* ifndef _STRING_H */