Index: aoc2024.c
==================================================================
--- aoc2024.c
+++ aoc2024.c
@@ -16,10 +16,15 @@
 TODO: I don't like my `linearize2d` thing! Thinking of a replacement
 ===================================================================== */
 
 void aoc202408(char *data, size_t len) {
     (void)len; // unused argument
+    struct TextGrid tg;
+    tg.data = data;
+    tg.cols = strchr(data, '\n') - data + 1;
+    tg.rows = tg.cols - 1; // rows includes the '\n'
+    #if 0
     unsigned anti[256][2]; // locations of antinodes
     unsigned nanti = 0;
     unsigned size = 1 + strchr(data, '\n') - data;
     for (unsigned row = 0; row < size-1; row++) {
         for (unsigned col = 0; col < size-1; col++) {
@@ -47,10 +52,11 @@
                 }
             }
         }
     }
     printf("There are %u antinodes within the map.\n", nanti);
+    #endif
 }
 
 /* === aoc202407 =======================================================
    Part one looks easy
    Part two also easy

Index: aocutils.h
==================================================================
--- aocutils.h
+++ aocutils.h
@@ -1,7 +1,9 @@
 #ifndef AOCUTILS_H_INCLUDED
 #define AOCUTILS_H_INCLUDED
+
+#include <stdbool.h>
 
 struct TextGrid {
     unsigned rows, cols;
     char *data; // may have '\n' at end of rows
 };