Move all under modules/ca

modules/ca/src/client/hostNameCache.cpp

@@ -0,0 +1,92 @@
+/*************************************************************************\
+* Copyright (c) 2002 The University of Chicago, as Operator of Argonne
+*     National Laboratory.
+* Copyright (c) 2002 The Regents of the University of California, as
+*     Operator of Los Alamos National Laboratory.
+* EPICS BASE Versions 3.13.7
+* and higher are distributed subject to a Software License Agreement found
+* in file LICENSE that is included with this distribution. 
+\*************************************************************************/
+
+/*  
+ *
+ *                              
+ *                    L O S  A L A M O S
+ *              Los Alamos National Laboratory
+ *               Los Alamos, New Mexico 87545
+ *                                  
+ *  Copyright, 1986, The Regents of the University of California.
+ *                                  
+ *           
+ *	Author Jeffrey O. Hill
+ *	johill@lanl.gov
+ */
+
+#include <algorithm>
+#include <cstring>
+
+#define epicsAssertAuthor "Jeff Hill johill@lanl.gov"
+#include "hostNameCache.h"
+#include "epicsGuard.h"
+
+hostNameCache::hostNameCache ( 
+    const osiSockAddr & addr, ipAddrToAsciiEngine & engine ) :
+    dnsTransaction ( engine.createTransaction() ), nameLength ( 0 )
+{
+    sockAddrToDottedIP ( &addr.sa, hostNameBuf, sizeof ( hostNameBuf ) );
+    hostNameBuf[ sizeof ( hostNameBuf ) - 1 ] = '\0';
+    nameLength = strlen ( hostNameBuf );
+    this->dnsTransaction.ipAddrToAscii ( addr, *this );
+}
+
+void hostNameCache::destroy ()
+{
+    delete this;
+}
+
+hostNameCache::~hostNameCache ()
+{
+    this->dnsTransaction.release ();
+}
+
+void hostNameCache::transactionComplete ( const char * pHostNameIn )
+{
+    epicsGuard < epicsMutex > guard ( this->mutex );
+    // a few legacy clients have a direct pointer to this buffer so we
+    // set the entrire string to nill terminators before we start copying
+    // in the name (this reduces the chance that another thread will see
+    // garbage characters).
+    size_t newNameLen = strlen ( pHostNameIn );
+    if ( newNameLen > sizeof ( this->hostNameBuf ) - 1u ) {
+        newNameLen = sizeof ( this->hostNameBuf ) - 1u;
+    }
+    strncpy ( this->hostNameBuf, "", sizeof ( this->hostNameBuf ) );
+    strncpy ( this->hostNameBuf, pHostNameIn, sizeof ( this->hostNameBuf ) - 1 );
+    this->nameLength = newNameLen;
+}
+
+unsigned hostNameCache::getName ( 
+    char * pBuf, unsigned bufSize ) const
+{
+    if ( bufSize == 0u ) {
+        return 0u;
+    }
+    epicsGuard < epicsMutex > guard ( this->mutex );
+    if ( this->nameLength > 0u ) {
+        if ( this->nameLength < bufSize ) {
+            strcpy ( pBuf, this->hostNameBuf );
+            return this->nameLength;
+        }
+        else {
+            unsigned reducedSize = bufSize - 1u;
+            strncpy ( pBuf, this->hostNameBuf, reducedSize );
+            pBuf [ reducedSize ] = '\0';
+            return reducedSize;
+        }
+    }
+    else {
+        osiSockAddr tmpAddr = this->dnsTransaction.address ();
+        return sockAddrToDottedIP ( &tmpAddr.sa, pBuf, bufSize );
+    }
+}
+