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Use arc4random if available

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This commit is contained in:
David Baer
2021-11-23 21:47:15 -05:00
parent 00db3de911
commit 776def6948
4 changed files with 21 additions and 3 deletions
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13
lib/grid.c
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@@ -1,5 +1,6 @@
#include <stdlib.h>
#include "grid.h"
#include "config.h"
#define MAX_EDGE_WEIGHT 100
#define TOP_LEFT_CORNER "\xe2\x94\x8f"
@@ -18,6 +19,14 @@
#define HORIZONTAL_HALF_LEFT "\xe2\x95\xb8"
#define HORIZONTAL_HALF_RIGHT "\xe2\x95\xba"
static edgeweight_t random_edgeweight() {
#ifdef HAVE_ARC4RANDOM
return arc4random_uniform(MAX_EDGE_WEIGHT);
#else // HAVE_ARC4RANDOM
return random()%MAX_EDGE_WEIGHT;
#endif // HAVE_ARC4RANDOM
}
mazegrid_t mazegrid_new(size_t width, size_t height) {
mazeedges_t** grid = calloc(height, sizeof(mazeedges_t*));
for (size_t i = 0; i < height; i++) {
@@ -66,8 +75,8 @@ edgeweight_t mazegrid_get_edge(mazegrid_t const* g, size_t x, size_t y, mazeedge
void mazegrid_randomize(mazegrid_t* g) {
for (size_t i = 0; i < g->height; i++) {
for (size_t j = 0; j < g->width; j++) {
if (i < g->height - 1) g->grid[i][j].up = (edgeweight_t)(random()%MAX_EDGE_WEIGHT);
if (j < g->width - 1) g->grid[i][j].right = (edgeweight_t)(random()%MAX_EDGE_WEIGHT);
if (i < g->height - 1) g->grid[i][j].up = random_edgeweight();
if (j < g->width - 1) g->grid[i][j].right = random_edgeweight();
}
}
}