input output

1 files changed, 42 insertions, 1 deletions

diff --git a/src/main.c b/src/main.c
index e6173ef043..b54205ce3f 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1,5 +1,46 @@
+#include "config.h"
 #include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+static int usage(char *arg0) {
+    fprintf(stderr, "Usage: %s --output outfile code.zig\n"
+        "Other options:\n"
+        "--version      print version number and exit\n"
+    , arg0);
+    return EXIT_FAILURE;
+}
 
 int main(int argc, char **argv) {
-    return 0;
+    char *arg0 = argv[0];
+    char *in_file = NULL;
+    char *out_file = NULL;
+    for (int i = 1; i < argc; i += 1) {
+        char *arg = argv[i];
+        if (arg[0] == '-' && arg[1] == '-') {
+            if (strcmp(arg, "--version") == 0) {
+                printf("%s\n", ZIG_VERSION_STRING);
+                return EXIT_SUCCESS;
+            } else if (i + 1 >= argc) {
+                return usage(arg0);
+            } else {
+                i += 1;
+                if (strcmp(arg, "--output") == 0) {
+                    out_file = argv[i];
+                } else {
+                    return usage(arg0);
+                }
+            }
+        } else if (!in_file) {
+            in_file = arg;
+        } else {
+            return usage(arg0);
+        }
+    }
+
+    if (!in_file || !out_file)
+        return usage(arg0);
+
+    fprintf(stderr, "in: %s out: %s\n", in_file, out_file);
+    return EXIT_SUCCESS;
 }