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authorKenneth Russel <[email protected]>2005-10-24 19:21:03 +0000
committerKenneth Russel <[email protected]>2005-10-24 19:21:03 +0000
commitd6f9dbc493df725d3d574403549de142c5e1222a (patch)
tree8eb152b0627f8d1897a27c5204d6ce2efb4963e4 /src/classes/com/sun/gluegen/cgram/CSymbolTable.java
parent42843c3290d64c41c9c8a18b93f5ad3c00d35ddc (diff)
Merged JSR-231 branch on to the main JOGL trunk. The main trunk now
contains the evolving JSR-231 Reference Implementation and the JSR-231 branch is permanently closed. git-svn-id: file:///usr/local/projects/SUN/JOGL/git-svn/svn-server-sync/jogl/trunk@401 232f8b59-042b-4e1e-8c03-345bb8c30851
Diffstat (limited to 'src/classes/com/sun/gluegen/cgram/CSymbolTable.java')
-rw-r--r--src/classes/com/sun/gluegen/cgram/CSymbolTable.java132
1 files changed, 132 insertions, 0 deletions
diff --git a/src/classes/com/sun/gluegen/cgram/CSymbolTable.java b/src/classes/com/sun/gluegen/cgram/CSymbolTable.java
new file mode 100644
index 000000000..51edf44c3
--- /dev/null
+++ b/src/classes/com/sun/gluegen/cgram/CSymbolTable.java
@@ -0,0 +1,132 @@
+package com.sun.gluegen.cgram;
+
+import java.util.Vector;
+import java.util.Hashtable;
+import java.util.Enumeration;
+
+
+
+public class CSymbolTable {
+
+ /** holds list of scopes */
+ private Vector scopeStack;
+
+ /** table where all defined names are mapped to TNode tree nodes */
+ private Hashtable symTable;
+
+ public CSymbolTable() {
+ scopeStack = new Vector(10);
+ symTable = new Hashtable(533);
+ }
+
+
+ /** push a new scope onto the scope stack.
+ */
+ public void pushScope(String s) {
+ //System.out.println("push scope:" + s);
+ scopeStack.addElement(s);
+ }
+
+ /** pop the last scope off the scope stack.
+ */
+ public void popScope() {
+ //System.out.println("pop scope");
+ int size = scopeStack.size();
+ if(size > 0)
+ scopeStack.removeElementAt(size - 1);
+ }
+
+ /** return the current scope as a string
+ */
+ public String currentScopeAsString() {
+ StringBuffer buf = new StringBuffer(100);
+ boolean first = true;
+ Enumeration e = scopeStack.elements();
+ while(e.hasMoreElements()) {
+ if(first)
+ first = false;
+ else
+ buf.append("::");
+ buf.append(e.nextElement().toString());
+ }
+ return buf.toString();
+ }
+
+ /** given a name for a type, append it with the
+ current scope.
+ */
+ public String addCurrentScopeToName(String name) {
+ String currScope = currentScopeAsString();
+ return addScopeToName(currScope, name);
+ }
+
+ /** given a name for a type, append it with the
+ given scope. MBZ
+ */
+ public String addScopeToName(String scope, String name) {
+ if(scope == null || scope.length() > 0)
+ return scope + "::" + name;
+ else
+ return name;
+ }
+
+ /** remove one level of scope from name MBZ*/
+ public String removeOneLevelScope(String scopeName) {
+ int index = scopeName.lastIndexOf("::");
+ if (index > 0) {
+ return scopeName.substring(0,index);
+ }
+ if (scopeName.length() > 0) {
+ return "";
+ }
+ return null;
+ }
+
+ /** add a node to the table with it's key as
+ the current scope and the name */
+ public TNode add(String name, TNode node) {
+ return (TNode)symTable.put(addCurrentScopeToName(name),node);
+ }
+
+
+ /** lookup a fully scoped name in the symbol table */
+ public TNode lookupScopedName(String scopedName) {
+ return (TNode)symTable.get(scopedName);
+ }
+
+ /** lookup an unscoped name in the table by prepending
+ the current scope.
+ MBZ -- if not found, pop scopes and look again
+ */
+ public TNode lookupNameInCurrentScope(String name) {
+ String scope = currentScopeAsString();
+ String scopedName;
+ TNode tnode = null;
+
+ //System.out.println( "\n"+ this.toString() );
+
+ while (tnode == null && scope != null) {
+ scopedName = addScopeToName(scope, name);
+ //System.out.println("lookup trying " + scopedName);
+ tnode = (TNode)symTable.get(scopedName);
+ scope = removeOneLevelScope(scope);
+ }
+ return tnode;
+ }
+
+ /** convert this table to a string */
+ public String toString() {
+ StringBuffer buff = new StringBuffer(300);
+ buff.append("CSymbolTable { \nCurrentScope: " + currentScopeAsString() +
+ "\nDefinedSymbols:\n");
+ Enumeration ke = symTable.keys();
+ Enumeration ve = symTable.elements();
+ while(ke.hasMoreElements()) {
+ buff.append(ke.nextElement().toString() + " (" +
+ TNode.getNameForType(((TNode)ve.nextElement()).getType()) + ")\n");
+ }
+ buff.append("}\n");
+ return buff.toString();
+ }
+
+};