X-Git-Url: https://pd.if.org/git/?p=pccts;a=blobdiff_plain;f=h%2FATokPtr.cpp;fp=h%2FATokPtr.cpp;h=d60e44625e89289bead6556329769d4efd4663a3;hp=0000000000000000000000000000000000000000;hb=cb15b978c765a661bf3154d865fa3e2401d649f5;hpb=c4e55222e892b8762e11f2425a64611e898ef20e

diff --git a/h/ATokPtr.cpp b/h/ATokPtr.cpp
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+++ b/h/ATokPtr.cpp
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+/* ATokPtr.C
+ *
+ * ANTLRToken MUST be defined before entry to this file.
+ *
+ * SOFTWARE RIGHTS
+ *
+ * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
+ * Set (PCCTS) -- PCCTS is in the public domain.  An individual or
+ * company may do whatever they wish with source code distributed with
+ * PCCTS or the code generated by PCCTS, including the incorporation of
+ * PCCTS, or its output, into commerical software.
+ * 
+ * We encourage users to develop software with PCCTS.  However, we do ask
+ * that credit is given to us for developing PCCTS.  By "credit",
+ * we mean that if you incorporate our source code into one of your
+ * programs (commercial product, research project, or otherwise) that you
+ * acknowledge this fact somewhere in the documentation, research report,
+ * etc...  If you like PCCTS and have developed a nice tool with the
+ * output, please mention that you developed it using PCCTS.  In
+ * addition, we ask that this header remain intact in our source code.
+ * As long as these guidelines are kept, we expect to continue enhancing
+ * this system and expect to make other tools available as they are
+ * completed.
+ *
+ * ANTLR 1.33
+ * Written by Russell Quong June 30, 1995
+ * Adapted by Terence Parr to ANTLR stuff
+ * Parr Research Corporation
+ * with Purdue University and AHPCRC, University of Minnesota
+ * 1989-1995
+ */
+
+#include "ATokPtr.h"
+
+void ANTLRTokenPtr::ref() const
+{
+    if (ptr_ != NULL) {
+		ptr_->ref();
+	}
+}
+
+#include <stdio.h>
+
+void ANTLRTokenPtr::deref()
+{
+    if (ptr_ != NULL)
+    {
+		ptr_->deref();
+		if ( ptr_->nref()==0 )
+		{
+		    delete ptr_;
+			ptr_ = NULL;
+		}
+    }
+}
+
+ANTLRTokenPtr::~ANTLRTokenPtr()
+{
+    deref();
+}
+
+void ANTLRTokenPtr::operator = (const ANTLRTokenPtr lhs)
+{
+    lhs.ref();	// protect against "xp = xp"; ie same underlying object
+    deref();
+    ptr_ = lhs.ptr_;
+}
+
+void ANTLRTokenPtr::operator = (ANTLRAbstractToken *addr)
+{
+    if (addr != NULL) {
+	addr->ref();
+    }
+    deref();
+    ptr_ = addr;
+}