Reorganize code into library for reuse

utils/mazemaker.c

@@ -0,0 +1,43 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <popt.h>
+#include <mazemaker.h>
+
+int main(int argc, char* argv[]) {
+    char c;
+    int width = 0, height = 0;
+    char const *filename = NULL;
+    struct poptOption options_table[] = {
+        { "width", 'w', POPT_ARG_INT, &width, 0,
+          "Width of the maze", "BLOCKS" },
+        { "height", 'h', POPT_ARG_INT, &height, 0,
+          "Height of the maze", "BLOCKS" },
+        POPT_AUTOHELP
+        { NULL, 0, 0, NULL, 0 }
+    };
+    poptContext ctx = poptGetContext(NULL, argc, (const char**) argv, options_table, 0);
+    poptSetOtherOptionHelp(ctx, "OUTPUT");
+    if (argc < 2) {
+        poptPrintUsage(ctx, stderr, 0);
+        exit(1);
+    }
+    while ((c = poptGetNextOpt(ctx)) >= 0) /* noop */ ;
+    if (c < -1) {
+        fprintf(stderr, "%s: %s\n", poptBadOption(ctx, POPT_BADOPTION_NOALIAS), poptStrerror(c));
+        return 1;
+    }
+    filename = poptGetArg(ctx);
+    if ((width == 0) || (height == 0)) {
+        fprintf(stderr, "Positive values for width (-w) and height (-h) are required.\n");
+        return 1;
+    }
+    if (filename == NULL) {
+        fprintf(stderr, "An output filename is required.\n");
+        return 1;
+    }
+    mazegrid_t maze;
+    mazemaker_generate_maze(width, height, &maze);
+    mazemaker_maze_to_png(&maze, filename);
+    mazemaker_free_maze(&maze);
+    poptFreeContext(ctx);
+}