From 8aa76b5b7f2d283295b9e5c6acfa1dd424ed5b14 Mon Sep 17 00:00:00 2001
From: Max Wash <mbswash@gmail.com>
Date: Sun, 19 Jul 2026 13:29:14 +0100
Subject: [PATCH] libc: core: implement strrchr

---
 lib/libc/core/string/strrchr.c | 14 ++++++++++++++
 lib/libc/include/string.h      |  1 +
 2 files changed, 15 insertions(+)
 create mode 100644 lib/libc/core/string/strrchr.c

diff --git a/lib/libc/core/string/strrchr.c b/lib/libc/core/string/strrchr.c
new file mode 100644
index 0000000..192de54
--- /dev/null
+++ b/lib/libc/core/string/strrchr.c
@@ -0,0 +1,14 @@
+#include <string.h>
+
+char *strrchr(const char *str, int c)
+{
+	size_t len = strlen(str);
+
+	for (int i = len - 1; i > 0; i--) {
+		if (str[i] == c) {
+			return (char *)&str[i];
+		}
+	}
+
+	return NULL;
+}
diff --git a/lib/libc/include/string.h b/lib/libc/include/string.h
index 22ae8ce..4951bc2 100644
--- a/lib/libc/include/string.h
+++ b/lib/libc/include/string.h
@@ -11,6 +11,7 @@ extern size_t strlen(const char *s);
 extern size_t strcspn(const char *dest, const char *src);
 
 extern char *strchr(const char *str, int c);
+extern char *strrchr(const char *str, int ch);
 
 extern int strcmp(const char *s1, const char *s2);
 extern int strncmp(const char *s1, const char *s2, unsigned long n);