day 16

aoc/aoc.h

@@ -28,6 +28,10 @@ grid_at(Grid *grid, i32 x, i32 y) {
     return grid->grid[y * grid->width + x];
 }
 
+static inline bool
+grid_contains(Grid *grid, i32 x, i32 y) {
+    return x >= 0 && y >= 0 && x < grid->width && y < grid->height;
+}
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 #include <stdio.h>
@@ -53,6 +57,12 @@ typedef double f64;
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #define CLAMP(x, lo, hi) ((x) < (lo) ? (lo) : (x) > (hi) ? (hi) : (x))
 
+#define MIN3(a, b, c) MIN(MIN(a, b), c)
+#define MAX3(a, b, c) MAX(MAX(a, b), c)
+
+#define MIN4(a, b, c, d) MIN(MIN(a, b), MIN(c, d))
+#define MAX4(a, b, c, d) MAX(MAX(a, b), MAX(c, d))
+
 #define Kilobytes(x) ((u64) (x) << 10)
 #define Megabytes(x) ((u64) (x) << 20)
 #define Gigabytes(x) ((u64) (x) << 30)