X-Git-Url: https://gerrit.simantics.org/r/gitweb?p=simantics%2Fplatform.git;a=blobdiff_plain;f=bundles%2Forg.simantics.graph.compiler%2Fsrc%2Forg%2Fsimantics%2Fgraph%2Fcompiler%2Finternal%2Fltk%2Fantlr%2FANTLRUtils.java;fp=bundles%2Forg.simantics.graph.compiler%2Fsrc%2Forg%2Fsimantics%2Fgraph%2Fcompiler%2Finternal%2Fltk%2Fantlr%2FANTLRUtils.java;h=7793473be1cf92a90754eeff39e81fe7d7114694;hp=0000000000000000000000000000000000000000;hb=6b5821ad728bf2f127091cb36d57b87749a6532f;hpb=c2ab38c94029486a379c79a7b38604f1c03afa44

diff --git a/bundles/org.simantics.graph.compiler/src/org/simantics/graph/compiler/internal/ltk/antlr/ANTLRUtils.java b/bundles/org.simantics.graph.compiler/src/org/simantics/graph/compiler/internal/ltk/antlr/ANTLRUtils.java
new file mode 100644
index 000000000..7793473be
--- /dev/null
+++ b/bundles/org.simantics.graph.compiler/src/org/simantics/graph/compiler/internal/ltk/antlr/ANTLRUtils.java
@@ -0,0 +1,97 @@
+package org.simantics.graph.compiler.internal.ltk.antlr;
+
+import java.io.IOException;
+
+import org.antlr.runtime.ANTLRInputStream;
+import org.antlr.runtime.CharStream;
+import org.antlr.runtime.CommonToken;
+import org.antlr.runtime.CommonTokenStream;
+import org.antlr.runtime.Lexer;
+import org.antlr.runtime.Parser;
+import org.antlr.runtime.RecognitionException;
+import org.antlr.runtime.Token;
+import org.antlr.runtime.tree.CommonTree;
+import org.antlr.runtime.tree.Tree;
+import org.simantics.graph.compiler.internal.ltk.ISource;
+import org.simantics.graph.compiler.internal.ltk.Location;
+import org.simantics.graph.compiler.internal.ltk.Problem;
+
+public class ANTLRUtils {
+
+	public static void setUpParser(ISource source, Lexer lexer, Parser parser) throws IOException {
+		CharStream stream = new ANTLRInputStream(source.open());
+		lexer.setCharStream(stream);
+		parser.setTokenStream(new CommonTokenStream(lexer));
+	}
+	
+	public static Location location(ISource source, Tree tree) {
+		return new Location(source, 
+				getStartLine(tree), 
+				getStartIndex(tree), 
+				getStopIndex(tree)+1
+			);
+	}
+	
+	public static int getStartLine(Tree tree) {
+		Token payload = ((CommonTree)tree).token;
+		int startLine = payload != null && payload.getTokenIndex() >= 0 ?
+				((CommonToken)payload).getLine()
+				: Integer.MAX_VALUE;
+		int count = tree.getChildCount();
+		for(int i=0;i<count;++i) {
+			Tree child = tree.getChild(i);
+			int temp = getStartLine(child);
+			if(temp < startLine)
+				startLine = temp;
+		}
+		return startLine;
+	}
+	
+	public static int getStartIndex(Tree tree) {
+		Token payload = ((CommonTree)tree).token;
+		int startIndex = payload != null && payload.getTokenIndex() >= 0 ?
+				((CommonToken)payload).getStartIndex()
+				: Integer.MAX_VALUE;
+		int count = tree.getChildCount();
+		for(int i=0;i<count;++i) {
+			Tree child = tree.getChild(i);
+			int temp = getStartIndex(child);
+			if(temp < startIndex)
+				startIndex = temp;
+		}
+		return startIndex;
+	}
+	
+	public static int getStopIndex(Tree tree) {
+		Token payload = ((CommonTree)tree).token;
+		int stopIndex =  payload != null && payload.getTokenIndex() >= 0 ?
+				((CommonToken)payload).getStopIndex()
+				: 0;
+		int count = tree.getChildCount();
+		for(int i=0;i<count;++i) {
+			Tree child = tree.getChild(i);
+			int temp = getStopIndex(child);
+			if(temp > stopIndex)
+				stopIndex = temp;
+		}
+		return stopIndex;
+	}
+	
+	public static Location location(ISource source, Token token) {
+		return new Location(source, 
+				token.getLine(),
+				((CommonToken) token).getStartIndex(), 
+				((CommonToken) token).getStopIndex()+1
+			);
+	}
+
+	public static Problem error(ISource source, RecognitionException e, Parser parser) {
+		return new Problem(location(source, e.token),
+				parser.getErrorMessage(e, parser.getTokenNames()));
+	}
+
+	public static Problem error(ISource source, RecognitionException e,	Lexer lexer) {
+		return new Problem(new Location(source, e.line, e.index, e.index+1),
+				lexer.getErrorMessage(e, lexer.getTokenNames()));
+	}	
+}