day 19

aoc/str.h

@@ -41,6 +41,7 @@ void str_print(str s);
 #ifdef STR_IMPLEMENTATION
 
 #include <stdio.h>
+#include <string.h>
 
 str make_str(uint8_t *data, size_t len) {
     return (str) { .data = data, .len = len };
@@ -108,25 +109,14 @@ bool str_starts_with(str s, str prefix) {
     if (prefix.len > s.len) {
         return false;
     }
-    for (size_t index = 0; index < prefix.len; ++index) {
-        if (s.data[index] != prefix.data[index]) {
-            return false;
-        }
-    }
-    return true;
+    return memcmp(s.data, prefix.data, prefix.len) == 0;
 }
 
 bool str_ends_with(str s, str suffix) {
     if (suffix.len > s.len) {
         return false;
     }
-    size_t offset = s.len - suffix.len;
-    for (size_t index = 0; index < suffix.len; ++index) {
-        if (s.data[offset + index] != suffix.data[index]) {
-            return false;
-        }
-    }
-    return true;
+    return memcmp(s.data + s.len - suffix.len, suffix.data, suffix.len) == 0;
 }
 
 bool str_empty(str s) {