From 4e09bca9e34c226b6d7e34b4fa11248405fd988e Mon Sep 17 00:00:00 2001
From: Anton Kling <anton@kling.gg>
Date: Sun, 22 Oct 2023 19:50:38 +0200
Subject: Move everything into a new repo.
---
userland/libc/string/strstr.c | 21 +++++++++++++++++++++
1 file changed, 21 insertions(+)
create mode 100644 userland/libc/string/strstr.c
(limited to 'userland/libc/string/strstr.c')
diff --git a/userland/libc/string/strstr.c b/userland/libc/string/strstr.c
new file mode 100644
index 0000000..20b9dc2
--- /dev/null
+++ b/userland/libc/string/strstr.c
@@ -0,0 +1,21 @@
+#include <string.h>
+
+char *strstr(const char *s1, const char *s2) {
+ // If s2 points to a string with zero length, the function shall return s1.
+ if ('\0' == *s2)
+ return s1;
+ for (; *s1; s1++) {
+ const char *t1 = s1;
+ const char *t2 = s2;
+ int is_dif = 0;
+ for (; *t2 && *t1; t1++, t2++) {
+ if (*t2 != *t1) {
+ is_dif = 1;
+ break;
+ }
+ }
+ if (!is_dif)
+ return s1;
+ }
+ return NULL;
+}
--
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