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Add option to set random seed for deterministic behavior

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Bump version to 1.6
This commit is contained in:
David Baer
2022-01-15 14:40:21 -05:00
parent 476aa4bce6
commit 0272fd726d
10 changed files with 58 additions and 12 deletions
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29
lib/grid.c
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@@ -1,5 +1,6 @@
#include <stdlib.h>
#include "grid.h"
#include "options.h"
#include "config.h"
#define MAX_EDGE_WEIGHT 100
@@ -19,14 +20,25 @@
#define HORIZONTAL_HALF_LEFT "\xe2\x95\xb8"
#define HORIZONTAL_HALF_RIGHT "\xe2\x95\xba"
static edgeweight_t random_edgeweight() {
static edgeweight_t random_edgeweight(mazeoptions_t const* options) {
if (!options->seed_set) {
#ifdef HAVE_ARC4RANDOM
return arc4random_uniform(MAX_EDGE_WEIGHT);
return arc4random_uniform(MAX_EDGE_WEIGHT);
#else // HAVE_ARC4RANDOM
return random()%MAX_EDGE_WEIGHT;
return random()%MAX_EDGE_WEIGHT;
#endif // HAVE_ARC4RANDOM
} else {
// use deterministic random number generator
return rand()%MAX_EDGE_WEIGHT;
}
}
#ifdef HAVE_SRAND_DETERMINISTIC
#define SRAND(x) (srand_deterministic(x))
#else
#define SRAND(x) (srand(x))
#endif // defined(HAVE_SRAND_DETERMINISTIC)
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++) {
@@ -72,11 +84,16 @@ edgeweight_t mazegrid_get_edge(mazegrid_t const* g, size_t x, size_t y, mazeedge
else return g->grid[y][x].up;
}
void mazegrid_randomize(mazegrid_t* g) {
void mazegrid_randomize(mazegrid_t* g, mazeoptions_t const* options) {
// initialize random system
if (options->seed_set) {
SRAND(options->seed);
}
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 = random_edgeweight();
if (j < g->width - 1) g->grid[i][j].right = random_edgeweight();
if (i < g->height - 1) g->grid[i][j].up = random_edgeweight(options);
if (j < g->width - 1) g->grid[i][j].right = random_edgeweight(options);
}
}
}