add version

src/args.c

@@ -1,4 +1,5 @@
 #include "args.h"
+#include "const.h"
 #include "rand.h"
 #include <stdio.h>
 #include <stdlib.h>
@@ -6,8 +7,9 @@
 #include <time.h>
 
 void print_help(int status_code) {
-  puts("usage: margen "
+  puts("usage: " NAME " "
        "[--help] "
+       "[-v] "
        "[-q] "
        "[-w=WIDTH] "
        "[-h=HEIGHT] "
@@ -16,7 +18,7 @@ void print_help(int status_code) {
        "[-p=PIXEL_SIZE] "
        "[-s=SLOPE] "
        "[-c=R,G,B] "
-       "[-v=R,G,B] "
+       "[--var=R,G,B] "
        "[-m]\n\n"
        "generates a marble-like pattern bitmap image.\n\n"
        "options:\n"
@@ -132,6 +134,9 @@ parameters parse_args(int argc, char **argv) {
       print_help(0);
     } else if (is_arg(arg, "-q") || is_arg(arg, "--quiet")) {
       params.quiet = true;
+    } else if (is_arg(arg, "-v") || is_arg(arg, "--version")) {
+      puts(NAME " " VERSION);
+      exit(0);
     } else if (is_arg(arg, "-w") || is_arg(arg, "--width")) {
       params.width = parse_ushort(arg, value);
       if (params.width == 0) {

src/const.h

@@ -0,0 +1,7 @@
+#ifndef CONST_H
+#define CONST_H
+
+#define NAME "margen"
+#define VERSION "v1.0.0"
+
+#endif

src/generator.c

@@ -1,5 +1,6 @@
 #include "args.h"
 #include "bmp.h"
+#include "const.h"
 #include "rand.h"
 #include <math.h>
 #include <stdio.h>
@@ -63,7 +64,8 @@ void debug_parameters(parameters params) {
     } else {
       printf("  color   %u,%u,%u\n", params.start[0], params.start[1],
              params.start[2]);
-      printf("var.    %u,%u,%u\n", params.var[0], params.var[1], params.var[2]);
+      printf("  var.    %u,%u,%u\n", params.var[0], params.var[1],
+             params.var[2]);
     }
   }
 }
@@ -90,6 +92,9 @@ void clean() {
 }
 
 void generate(parameters params) {
+  if (!params.quiet) {
+    puts(NAME " " VERSION);
+  }
   init(params);
   bmp_generate(params.width, params.height, color_depth, params.file_path,
                generate_bmp_line);