Initial commit

engines/glk/alan3/syntax.cpp

@@ -0,0 +1,94 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "glk/alan3/syntax.h"
+#include "glk/alan3/word.h"
+#include "glk/alan3/msg.h"
+#include "glk/alan3/lists.h"
+#include "glk/alan3/compatibility.h"
+
+namespace Glk {
+namespace Alan3 {
+
+/* PUBLIC DATA */
+SyntaxEntry *stxs;      /* Syntax table pointer */
+
+
+/* PRIVATE TYPES & DATA */
+
+
+/*+++++++++++++++++++++++++++++++++++++++++++++++++++*/
+
+/*======================================================================*/
+ElementEntry *elementTreeOf(SyntaxEntry *stx) {
+	return (ElementEntry *) pointerTo(stx->elms);
+}
+
+
+/*----------------------------------------------------------------------*/
+static SyntaxEntry *findSyntaxEntryForPreBeta2(int verbCode, SyntaxEntry *foundStx) {
+	SyntaxEntryPreBeta2 *stx;
+	for (stx = (SyntaxEntryPreBeta2 *)stxs; !isEndOfArray(stx); stx++)
+		if (stx->code == verbCode) {
+			foundStx = (SyntaxEntry *)stx;
+			break;
+		}
+	return (foundStx);
+}
+
+
+/*----------------------------------------------------------------------*/
+static SyntaxEntry *findSyntaxEntry(int verbCode) {
+	SyntaxEntry *stx;
+	for (stx = stxs; !isEndOfArray(stx); stx++)
+		if (stx->code == verbCode) {
+			return stx;
+			break;
+		}
+	return nullptr;
+}
+
+
+/*======================================================================*/
+SyntaxEntry *findSyntaxTreeForVerb(CONTEXT, int verbCode) {
+	SyntaxEntry *foundStx = nullptr;
+	if (isPreBeta2(header->version)) {
+		foundStx = findSyntaxEntryForPreBeta2(verbCode, foundStx);
+	} else {
+		foundStx = findSyntaxEntry(verbCode);
+	}
+	if (foundStx == nullptr)
+		// No matching syntax
+		R0CALL1(error, M_WHAT)
+	return foundStx;
+}
+
+
+/*======================================================================*/
+char *parameterNameInSyntax(int syntaxNumber, int parameterNumber) {
+	Aaddr adr = addressAfterTable(header->parameterMapAddress, sizeof(ParameterMapEntry));
+	Aaddr *syntaxParameterNameTable = (Aaddr *)pointerTo(memory[adr]);
+	Aaddr *parameterNameTable = (Aaddr *)pointerTo(syntaxParameterNameTable[syntaxNumber - 1]);
+	return stringAt(parameterNameTable[parameterNumber - 1]);
+}
+
+} // End of namespace Alan3
+} // End of namespace Glk