meta: move photon/libc to root

libc/string/strcmp.c

@@ -0,0 +1,25 @@
+#include <stddef.h>
+
+int strcmp(const char *s1, const char *s2)
+{
+    int i;
+    for (i = 0; s1[i] == s2[i]; i++) {
+        if (s1[i] == '\0') {
+            return 0;
+        }
+    }
+
+    return s1[i] - s2[i];
+}
+
+int strncmp(const char *s1, const char *s2, size_t n)
+{
+    for (; n > 0; s1++, s2++, --n) {
+        if (*s1 != *s2) {
+            return ((*(unsigned char *)s1 < *(unsigned char *)s2) ? -1 : 1);
+        } else if (*s1 == '\0') {
+            return 0;
+        }
+    }
+    return 0;
+}