1 files changed, 47 insertions, 0 deletions
diff --git a/src/main.c b/src/main.c
index 7b3bd26..bd303e6 100644
--- a/src/main.c
+++ b/src/main.c
@@ -5,15 +5,62 @@
 #include <lauxlib.h>
 #include <lualib.h>
 
+#define OPTPARSE_IMPLEMENTATION
+#define OPTPARSE_API static
+#include "optparse.h"
+
 int luaopen_hpdf(lua_State *L);
 
 extern const char mkpdf_lua[];
 extern const unsigned long mkpdf_lua_size;
 
+void usage(const char *program)
+{
+    fprintf(stderr, "%s [--version] [--help] <script-path>\n", program);
+}
+
 int main(int argc, char **argv)
 {
     lua_State *L;
     int rc = 0;
+    int option = 0;
+    struct optparse optparse;
+    const char *script;
+
+    const struct optparse_long options[] =
+    {
+        { "version", 'v', OPTPARSE_NONE },
+        { "help", 'h', OPTPARSE_NONE },
+        { NULL }
+    };
+
+    optparse_init(&optparse, argv);
+
+    while ((option = optparse_long(&optparse, options, NULL)) != -1)
+    {
+        switch (option)
+        {
+            case 'v':
+                printf("%s\n", MKPDF_VERSION);
+                return 0;
+
+            case 'h':
+                usage(argv[0]);
+                return 1;
+
+            case '?':
+                fprintf(stderr, "%s\n", optparse.errmsg);
+                usage(argv[0]);
+                return 1;
+        }
+    }
+
+    if ((script = optparse_arg(&optparse)) == NULL)
+    {
+        fprintf(stderr, "error: no script given\n\n");
+        usage(argv[0]);
+        return 1;
+    }
 
     L = luaL_newstate();