Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtinfo/dtinfogen/infolib/etc/AttributeStore.C

@@ -0,0 +1,111 @@
+/* $XConsortium: AttributeStore.C /main/3 1996/08/21 15:46:08 drk $ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <iostream.h>
+
+#include "List.h"
+#include "AttributeRec.h"
+#include "AttributeStore.h"
+#include "HashBucketEntry.h"
+
+// Debugging macro
+#ifdef DEBUG
+#define DBG(level) if ( dbgLevel >= level)
+#else
+#define DBG(level) if (0)
+#endif
+
+//---------------------------------------------------------
+// AttributeStore : Constructor
+
+AttributeStore::AttributeStore( int sz ):NumBuckets(sz)
+{
+
+  char *dbgStr;
+  dbgStr = getenv("OL_DEBUG");
+  dbgLevel = ( dbgStr ? atoi(dbgStr):0);
+
+  HashTable = new HashBucketEntry * [ NumBuckets ];
+  if ( !HashTable ) {
+    cerr << "(ERROR) Unable to allocate memory for HashTable\n";
+    exit(1);
+  }
+
+  for ( int i=0; i < sz; i++) {
+    HashTable[i] = NULL;
+  }
+  
+}
+
+//---------------------------------------------------------
+// AttributeStore : Destructor
+
+AttributeStore::~AttributeStore()
+{
+  for ( int i=0; i < NumBuckets; i++ ) {
+    delete HashTable[i];
+  }
+}
+
+//---------------------------------------------------------
+// AttributeStore::hash()
+int AttributeStore::hash( char *HashKeyStr )
+{
+  DBG(10) cerr << "(DEBUG) Invoking hash function with HashKeyStr = "
+               << HashKeyStr << endl;
+  
+  int sum=0;
+
+  // This is a simple hash function
+  for ( char *ptr=HashKeyStr; *ptr; ptr++ ) {
+    sum += *ptr;
+  }
+
+  sum = sum % NumBuckets;
+
+  DBG(10) cerr << "(DEBUG) returning value for hash function = "
+	       << sum << endl;
+  return ( sum );
+}
+  
+    
+//---------------------------------------------------------
+// AttributeStore::lookup
+char *AttributeStore::lookup( Token *ThisToken, char *aName )
+{
+  int HashValue;
+  AttributeRec *aRecPtr;
+  
+  HashValue=hash( aName );
+  aRecPtr = HashTable[ HashValue ]->lookup( aName );
+
+  return ( aRecPtr->GetAttributeValue( ThisToken ) );
+}
+
+//---------------------------------------------------------
+// AttributeStore::add
+
+int AttributeStore::insert ( AttributeRec *att )
+{
+
+  int HashValue;
+  HashBucketEntry *BucketEntry;
+
+  HashValue = hash ( att->name );
+  
+  BucketEntry = HashTable [ HashValue ];
+  
+  if ( BucketEntry->lookup ( att->name ) ) {
+    return(0);
+  }
+  else {
+    BucketEntry->insert( att );
+    return(1);
+  }
+
+}
+
+
+