Added command line option parsing, info bar is now visible by default

1 files changed, 58 insertions, 0 deletions

diff --git a/src/option.c b/src/option.c
new file mode 100644
index 0000000..66a99f0
--- /dev/null
+++ b/src/option.c
@@ -0,0 +1,58 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "option.h"
+
+static const char version[] = "qwe version 0.01";
+static const char usage[] =
+    "Usage: qwe [options...] <file>\n"
+    "\n"
+    "  -i              Hide info bar by default.\n"
+    "  -h              Show help message and quit.\n"
+    "  -v              Show the version number and quit.\n";
+
+void print_usage()
+{
+    printf("%s\n", usage);
+}
+
+void print_version()
+{
+    printf("%s\n", version);
+}
+
+struct option _options;
+const struct option *options = (const struct option *)&_options;
+
+void parse_options(int argc, char **argv)
+{
+    // default options
+    _options.fullscreen = false;
+    _options.show_info = true;
+
+    // override options from commandline parameters
+    int opt;
+    while ((opt = getopt(argc, argv, "hvi")) != -1) {
+        switch (opt) {
+        case '?':
+            print_usage();
+            exit(EXIT_FAILURE);
+        case 'h':
+            print_usage();
+            exit(EXIT_SUCCESS);
+        case 'v':
+            print_version();
+            exit(EXIT_SUCCESS);
+        case 'i':
+            _options.show_info = false;
+        }
+    }
+
+    if (optind >= argc) {
+        print_usage();
+        exit(EXIT_FAILURE);
+    }
+
+    _options.file_name = argv[optind];
+}