C4Script: Allow executing strings from cmdline instead of only files

include/c4script/c4script.h

@@ -1,7 +1,7 @@
 /*
  * OpenClonk, http://www.openclonk.org
  *
- * Copyright (c) 2012-2013, The OpenClonk Team and contributors
+ * Copyright (c) 2012-2015, The OpenClonk Team and contributors
  *
  * Distributed under the terms of the ISC license; see accompanying file
  * "COPYING" for details.
@@ -20,7 +20,8 @@
 extern "C" {
 #endif
 
-int c4s_runscript(const char * filename);
+int c4s_runfile(const char *filename);
+int c4s_runstring(const char *script);
 
 #ifdef __cplusplus
 }

src/script/C4ScriptMain.cpp

@@ -1,7 +1,7 @@
 /*
  * OpenClonk, http://www.openclonk.org
  *
- * Copyright (c) 2012-2013, The OpenClonk Team and contributors
+ * Copyright (c) 2012-2015, The OpenClonk Team and contributors
  *
  * Distributed under the terms of the ISC license; see accompanying file
  * "COPYING" for details.
@@ -17,7 +17,30 @@
 // c4script.h is useable without that.
 #include "../../include/c4script/c4script.h"
 
+#include <stdio.h>
+#include <string.h>
+
+int usage(const char *argv0)
+{
+	fprintf(stderr, "Usage:\n%s -e <script>\n%s <file>\n", argv0, argv0);
+	return 1;
+}
+
 int main(int argc, const char * argv[])
 {
-	return c4s_runscript(argv[1]);
+	if (argc < 2)
+		return usage(argv[0]);
+
+	if (strcmp(argv[1], "-e") == 0)
+	{
+		if (argc != 3)
+			return usage(argv[0]);
+		return c4s_runstring(argv[2]);
+	}
+	else
+	{
+		if (argc != 2)
+			return usage(argv[0]);
+		return c4s_runfile(argv[1]);
+	}
 }

src/script/C4ScriptStandalone.cpp

@@ -1,7 +1,7 @@
 /*
  * OpenClonk, http://www.openclonk.org
  *
- * Copyright (c) 2011-2013, The OpenClonk Team and contributors
+ * Copyright (c) 2011-2015, The OpenClonk Team and contributors
  *
  * Distributed under the terms of the ISC license; see accompanying file
  * "COPYING" for details.
@@ -24,13 +24,29 @@
 #include "object/C4DefList.h"
 #include "script/C4ScriptHost.h"
 
-int c4s_runscript(const char * filename)
+void InitializeC4Script()
 {
 	InitCoreFunctionMap(&ScriptEngine);
 
 	// Seed PRNG
 	FixedRandom(time(NULL));
+}
 
+C4Value RunLoadedC4Script()
+{
+	// Link script engine (resolve includes/appends, generate code)
+	ScriptEngine.Link(&::Definitions);
+
+	// Set name list for globals
+	ScriptEngine.GlobalNamed.SetNameList(&ScriptEngine.GlobalNamedNames);
+	C4Value result = GameScript.Call("Main");
+	GameScript.Clear();
+	ScriptEngine.Clear();
+	return result;
+}
+
+int c4s_runfile(const char * filename)
+{
 	C4Group File;
 	if (!File.Open(GetWorkingDirectory()))
 	{
@@ -46,15 +62,17 @@ int c4s_runscript(const char * filename)
 		fprintf(stderr, "FindNextEntry failed: %s\n", File.GetError());
 		return 1;
 	}
+
+	InitializeC4Script();
 	GameScript.Load(File, fn.getData(), NULL, NULL);
-
-	// Link script engine (resolve includes/appends, generate code)
-	ScriptEngine.Link(&::Definitions);
-
-	// Set name list for globals
-	ScriptEngine.GlobalNamed.SetNameList(&ScriptEngine.GlobalNamedNames);
-	GameScript.Call("Main");
-	GameScript.Clear();
-	ScriptEngine.Clear();
+	RunLoadedC4Script();
+	return 0;
+}
+
+int c4s_runstring(const char *script)
+{
+	InitializeC4Script();
+	GameScript.LoadData("<memory>", script, NULL);
+	RunLoadedC4Script();
 	return 0;
 }