1 files changed, 156 insertions, 0 deletions
diff --git a/src/backend/access/transam/xid.c b/src/backend/access/transam/xid.c
new file mode 100644
index 00000000000..faeeb623d58
--- /dev/null
+++ b/src/backend/access/transam/xid.c
@@ -0,0 +1,156 @@
+/*-------------------------------------------------------------------------
+ *
+ * xid.c--
+ *    POSTGRES transaction identifier code.
+ *
+ * Copyright (c) 1994, Regents of the University of California
+ *
+ *
+ * IDENTIFICATION
+ *    $Header: /cvsroot/pgsql/src/backend/access/transam/Attic/xid.c,v 1.1.1.1 1996/07/09 06:21:14 scrappy Exp $
+ *
+ * OLD COMMENTS
+ * XXX WARNING
+ *	Much of this file will change when we change our representation
+ *	of transaction ids -cim 3/23/90
+ *
+ * It is time to make the switch from 5 byte to 4 byte transaction ids
+ * This file was totally reworked. -mer 5/22/92
+ *
+ *-------------------------------------------------------------------------
+ */
+#include <stdio.h>
+#include "postgres.h"
+#include "utils/palloc.h"
+#include "utils/elog.h"
+#include "utils/memutils.h"
+#include "utils/nabstime.h"
+
+extern TransactionId NullTransactionId;
+extern TransactionId DisabledTransactionId;
+extern TransactionId AmiTransactionId;
+extern TransactionId FirstTransactionId;
+
+/* ----------------------------------------------------------------
+ * 	TransactionIdIsValid
+ *
+ *	Macro-ize me.
+ * ----------------------------------------------------------------
+ */
+bool
+TransactionIdIsValid(TransactionId transactionId)
+{
+    return ((bool) (transactionId != NullTransactionId) );
+}
+
+/* XXX char16 name for catalogs */
+TransactionId
+xidin(char *representation)
+{
+    return (atol(representation));
+}
+
+/* XXX char16 name for catalogs */
+char*
+xidout(TransactionId transactionId)
+{
+/*    return(TransactionIdFormString(transactionId)); */
+    char 			*representation;
+    
+    /* maximum 32 bit unsigned integer representation takes 10 chars */
+    representation = palloc(11);
+    
+    (void)sprintf(representation, "%u", transactionId);
+    
+    return (representation);
+
+}
+
+/* ----------------------------------------------------------------
+ *	StoreInvalidTransactionId
+ *
+ *	Maybe do away with Pointer types in these routines.
+ *      Macro-ize this one.
+ * ----------------------------------------------------------------
+ */
+void
+StoreInvalidTransactionId(TransactionId *destination)
+{
+    *destination = NullTransactionId;
+}
+
+/* ----------------------------------------------------------------
+ *	TransactionIdStore
+ *
+ *      Macro-ize this one.
+ * ----------------------------------------------------------------
+ */
+void
+TransactionIdStore(TransactionId transactionId,
+		   TransactionId *destination)
+{
+    *destination = transactionId;
+}
+
+/* ----------------------------------------------------------------
+ *	TransactionIdEquals
+ * ----------------------------------------------------------------
+ */
+bool
+TransactionIdEquals(TransactionId id1, TransactionId id2)
+{
+    return ((bool) (id1 == id2));
+}
+
+/* ----------------------------------------------------------------
+ *	TransactionIdIsLessThan
+ * ----------------------------------------------------------------
+ */
+bool
+TransactionIdIsLessThan(TransactionId id1, TransactionId id2)
+{
+    return ((bool)(id1 < id2));
+}
+
+/* ----------------------------------------------------------------
+ *	xideq
+ * ----------------------------------------------------------------
+ */
+
+/*
+ *	xideq		- returns 1, iff xid1 == xid2
+ *				  0  else;
+ */
+bool
+xideq(TransactionId xid1, TransactionId xid2)
+{
+    return( (bool) (xid1 == xid2) );
+}
+
+
+
+/* ----------------------------------------------------------------
+ *	TransactionIdIncrement
+ * ----------------------------------------------------------------
+ */
+void
+TransactionIdIncrement(TransactionId *transactionId)
+{
+    
+    (*transactionId)++;
+    if (*transactionId == DisabledTransactionId)
+	elog(FATAL, "TransactionIdIncrement: exhausted XID's");
+    return;
+}
+
+/* ----------------------------------------------------------------
+ *	TransactionIdAdd
+ * ----------------------------------------------------------------
+ */
+void
+TransactionIdAdd(TransactionId *xid, int value)
+{
+    *xid += value;
+    return;
+}
+