DIRECTOR: Lingo: Initial code for c_call()

scummvm · Aug 3, 2016 · 3d543c6 · 3d543c6
1 parent 6dc858a
commit 3d543c6
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Showing 3 changed files with 43 additions and 3 deletions.
diff --git a/engines/director/lingo/lingo-code.cpp b/engines/director/lingo/lingo-code.cpp
@@ -397,6 +397,7 @@ void Lingo::define(Common::String &name, int start, int end, int nargs) {
 	}
 
 	sym->u.defn = new ScriptData(&(*_currentScript)[start], end - start + 1);
+	sym->nargs = nargs;
 }
 
 void Lingo::codeArg(Common::String &s) {
@@ -412,7 +413,7 @@ int Lingo::codeId(Common::String &s) {
 int Lingo::codeId_(Common::String &name) {
 	int ret;
 
-	if (!_handlers.contains(name)) { // This is a call
+	if (_handlers.contains(name)) { // This is a call
 		ret = code1(c_call);
 		codeString(name.c_str());
 		code1((inst)0);	// Zero arguments
@@ -428,7 +429,36 @@ int Lingo::codeId_(Common::String &name) {
 
 
 void Lingo::c_call() {
-	warning("STUB: c_call()");
+	Common::String name((char *)&(*g_lingo->_currentScript)[g_lingo->_pc]);
+	g_lingo->_pc += g_lingo->calcStringAlignment(name.c_str());
+
+	if (!g_lingo->_handlers.contains(name)) {
+		error("Call to undefined handler '%s'", name.c_str());
+	}
+
+	Symbol *sym = g_lingo->_handlers[name];
+
+	int nargs = READ_UINT32(&(*g_lingo->_currentScript)[g_lingo->_pc++]);
+
+	for (int i = nargs; i < sym->nargs; i++) {
+		Datum d;
+
+		d.val = 0; // TODO, FIXME: Must be VOID
+		g_lingo->push(d);
+	}
+
+	CFrame *fp = new CFrame;
+
+	fp->sp = sym;
+	fp->retpc = g_lingo->_pc;
+	fp->retscript = g_lingo->_currentScript;
+
+	g_lingo->_callstack.push_back(fp);
+
+	g_lingo->_currentScript = sym->u.defn;
+	g_lingo->execute(0);
+
+	g_lingo->_returning = 0;
 }
 
 void Lingo::c_procret() {

diff --git a/engines/director/lingo/lingo.cpp b/engines/director/lingo/lingo.cpp
@@ -71,6 +71,7 @@ Symbol::Symbol() {
 	name = NULL;
 	type = VOID;
 	u.str = NULL;
+	nargs = 0;
 }
 
 Lingo::Lingo(DirectorEngine *vm) : _vm(vm) {

diff --git a/engines/director/lingo/lingo.h b/engines/director/lingo/lingo.h
@@ -81,9 +81,10 @@ typedef struct Symbol {	/* symbol table entry */
 	union {
 		int		val;		/* VAR */
 		float	fval;		/* FLOAT */
-		ScriptData	*defn;		/* FUNCTION, PROCEDURE */
+		ScriptData	*defn;	/* FUNCTION, PROCEDURE */
 		char	*str;		/* STRING */
 	} u;
+	int nargs;
 
 	Symbol();
 } Symbol;
@@ -95,6 +96,12 @@ typedef union Datum {	/* interpreter stack type */
 	Datum() { val = 0; sym = NULL; }
 } Datum;
 
+typedef struct CFrame {	/* proc/func call stack frame */
+	Symbol	*sp;	/* symbol table entry */
+	int		retpc;	/* where to resume after return */
+	ScriptData	*retscript;	 /* which script to resume after return */
+} CFrame;
+
 typedef Common::HashMap<int32, ScriptData *> ScriptHash;
 typedef Common::Array<Datum> StackData;
 typedef Common::HashMap<Common::String, Symbol *, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> SymbolHash;
@@ -168,6 +175,8 @@ class Lingo {
 	bool _returning;
 	bool _indef;
 
+	Common::Array<CFrame *> _callstack;
+
 private:
 	int parse(const char *code);
 	void push(Datum d);