From 1d554f3161e7bcf76a180c9280a53cd0f5927591 Mon Sep 17 00:00:00 2001
From: Andrew Kelley <superjoe30@gmail.com>
Date: Wed, 5 Aug 2015 15:46:40 -0700
Subject: [PATCH] input output

---
 CMakeLists.txt |  7 ++++++-
 src/main.c     | 43 ++++++++++++++++++++++++++++++++++++++++++-
 test/add.h     |  1 +
 test/add.zig   |  3 +++
 test/hello.zig |  6 ++++++
 5 files changed, 58 insertions(+), 2 deletions(-)
 create mode 100644 test/add.h
 create mode 100644 test/add.zig
 create mode 100644 test/hello.zig

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f044e0bd4c..4ec8834460 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -6,7 +6,7 @@ set(CMAKE_BUILD_TYPE "Debug" CACHE STRING
 project(zig C)
 set(CMAKE_MODULE_PATH ${CMAKE_SOURCE_DIR}/cmake ${CMAKE_MODULE_PATH})
 
-set(ZIG_VERSION_MAJOR 1)
+set(ZIG_VERSION_MAJOR 0)
 set(ZIG_VERSION_MINOR 0)
 set(ZIG_VERSION_PATCH 0)
 set(ZIG_VERSION "${ZIG_VERSION_MAJOR}.${ZIG_VERSION_MINOR}.${ZIG_VERSION_PATCH}")
@@ -15,6 +15,11 @@ message("Configuring zig version ${ZIG_VERSION}")
 find_package(llvm)
 include_directories(${LLVM_INCLUDE_DIR})
 
+include_directories(
+    ${CMAKE_SOURCE_DIR}
+    ${CMAKE_BINARY_DIR}
+)
+
 set(ZIG_SOURCES
     "${CMAKE_SOURCE_DIR}/src/main.c"
 )
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;
 }
diff --git a/test/add.h b/test/add.h
new file mode 100644
index 0000000000..6295ab95cd
--- /dev/null
+++ b/test/add.h
@@ -0,0 +1 @@
+int add(int a, int b);
diff --git a/test/add.zig b/test/add.zig
new file mode 100644
index 0000000000..59aab49836
--- /dev/null
+++ b/test/add.zig
@@ -0,0 +1,3 @@
+int add(int a, int b) {
+    return a + b;
+}
diff --git a/test/hello.zig b/test/hello.zig
new file mode 100644
index 0000000000..f18ba2558b
--- /dev/null
+++ b/test/hello.zig
@@ -0,0 +1,6 @@
+#include <stdio.h>
+#include "add.h"
+
+int main(int argc, char **argv) {
+    fprintf(stderr, "hello: %d", add(1, 2));
+}