DIRECTOR: Lingo: Implement MCI command parsing

scummvm · Aug 3, 2016 · 75d759c · 75d759c
1 parent df50e60
commit 75d759c
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Showing 2 changed files with 98 additions and 2 deletions.
diff --git a/engines/director/director.cpp b/engines/director/director.cpp
@@ -70,7 +70,8 @@ Common::Error DirectorEngine::run() {
 
 	_lingo = new Lingo();
 
-	_lingo->parse("mci \"open MM\\T005045a.wav type WaveAudio alias T005045a\"");
+	_lingo->parse("mci \"open MM\\T005045a.wav type WaveAudio alias T005045a\"\n\
+	mci \"play T005045a from 22710 to 32872\"");
 
 #if 0
 	_lingo->parse("set x = 1\n\

diff --git a/engines/director/lingo/lingo-funcs.cpp b/engines/director/lingo/lingo-funcs.cpp
@@ -24,8 +24,103 @@
 
 namespace Director {
 
+enum MCITokenType {
+	kMCITokenNone,
+
+	kMCITokenOpen,
+	kMCITokenWait,
+	kMCITokenPlay,
+
+	kMCITokenType,
+	kMCITokenAlias,
+	kMCITokenBuffer,
+	kMCITokenFrom,
+	kMCITokenTo
+};
+
+struct MCIToken {
+	MCITokenType command;
+	MCITokenType flag;
+	const char *token;
+	int pos;
+} MCITokens[] = {
+	{ kMCITokenNone, kMCITokenOpen,   "open", 0 },
+	{ kMCITokenOpen, kMCITokenType,   "type", 1 },
+	{ kMCITokenOpen, kMCITokenAlias,  "alias", 2 },
+	{ kMCITokenOpen, kMCITokenBuffer, "buffer", 3 },
+
+	{ kMCITokenNone, kMCITokenPlay,   "play", 0 },
+	{ kMCITokenPlay, kMCITokenFrom,   "from", 1 },
+	{ kMCITokenPlay, kMCITokenTo,     "to", 2 },
+
+	{ kMCITokenNone, kMCITokenWait,   "wait", 0 },
+
+	{ kMCITokenNone, kMCITokenNone,   0, 0 }
+};
+
 int Lingo::func_mci(Common::String *s) {
-	warning("STUB: mci(\"%s\")", s->c_str());
+	Common::String params[5];
+	MCITokenType command = kMCITokenNone;
+
+	s->trim();
+	s->toLowercase();
+
+	MCITokenType state = kMCITokenNone;
+	Common::String token;
+	const char *ptr = s->c_str();
+	int respos = -1;
+
+	while (*ptr) {
+		while (*ptr && *ptr == ' ')
+			ptr++;
+
+		token.clear();
+
+		while (*ptr && *ptr != ' ')
+			token += *ptr++;
+
+		switch (state) {
+		case kMCITokenNone:
+			{
+				MCIToken *f = MCITokens;
+
+				while (f->token) {
+					if (command == f->command && token == f->token)
+						break;
+
+					f++;
+				}
+
+				if (command == kMCITokenNone) { // We caught command
+					command = f->flag; // Switching to processing this command parameters
+				} else if (f->flag == kMCITokenNone) { // Unmatched token, parsing as filename
+					if (!params[0].empty())
+						warning("Duplicate filename in MCI command: %s -> %s", params[0].c_str(), token.c_str());
+					params[0] = token;
+				} else {
+					state = f->flag;
+					respos = f->pos;
+				}
+				break;
+			}
+		default:
+			params[respos] = token;
+			state = kMCITokenNone;
+			break;
+		}
+
+	}
+
+	switch (command) {
+	case kMCITokenOpen:
+		warning("MCI open file: %s, type: %s, alias: %s buffer: %s", params[0].c_str(), params[1].c_str(), params[2].c_str(), params[3].c_str());
+		break;
+	case kMCITokenPlay:
+		warning("MCI play file: %s, from: %s, to: %s", params[0].c_str(), params[1].c_str(), params[2].c_str());
+		break;
+	default:
+		warning("Unhandled MCI command: %s", s->c_str());
+	}
 
 	return 0;
 }