c/palindrome.c: check if a word is a valid palindrome

c/palindrome.c

@@ -0,0 +1,21 @@
+int palindrome(const char *str, unsigned len) {
+  unsigned idx = 0;
+
+  for(; idx < (len - (len % 2)) / 2; idx += 1) {
+    if(str[idx] != str[len - idx - 1]) {
+      return 0;
+    }
+  }
+
+  return 1;
+}
+
+#include <string.h>
+
+int main(int argc, char **argv) {
+  if(argc < 2) {
+    return 2;
+  }
+
+  return !palindrome(argv[1], strlen(argv[1]));
+}