initial commit

src/args.c

@@ -0,0 +1,53 @@
+#include "args.h"
+#include "config.h"
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+void print_help(int status_code) {
+  puts(PACKAGE " " VERSION "\n\n"
+               "usage: " PACKAGE " "
+               "[--help] "
+               "[-v] "
+               "\n\n"
+               "Fusion Of Real-time Generative Effects.\n\n"
+               "options:\n"
+               "  --help             show this help message and exit\n"
+               "  -v, --version      print version\n");
+  exit(status_code);
+}
+
+void invalid_arg(char *arg) {
+  fprintf(stderr, "invalid argument: '%s'\n\n", arg);
+  print_help(1);
+}
+
+bool is_arg(char *arg, char *ref) { return strcoll(arg, ref) == 0; }
+
+char *split_arg_value(char *arg) {
+  strtok(arg, "=");
+  return strtok(NULL, "=");
+}
+
+parameters parse_args(int argc, char **argv) {
+  parameters params;
+
+  int i;
+  char *arg;
+  char *value;
+  for (i = 1; i < argc; i++) {
+    arg = argv[i];
+    value = split_arg_value(arg);
+    if (is_arg(arg, "--help")) {
+      print_help(0);
+    } else if (is_arg(arg, "-v") || is_arg(arg, "--version")) {
+      puts(PACKAGE " " VERSION);
+      exit(0);
+    } else {
+      invalid_arg(arg);
+    }
+  }
+
+  return params;
+}