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getName() returns string size

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This commit is contained in:
Jeff Hill
2004-10-19 20:24:57 +00:00
parent 2d47ba27b1
commit 085b228c83
2 changed files with 32 additions and 13 deletions
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33
src/ca/hostNameCache.cpp
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@@ -29,8 +29,9 @@
#include "hostNameCache.h"
#include "epicsGuard.h"
hostNameCache::hostNameCache ( const osiSockAddr & addr, ipAddrToAsciiEngine & engine ) :
dnsTransaction ( engine.createTransaction() ), ioComplete ( false )
hostNameCache::hostNameCache (
const osiSockAddr & addr, ipAddrToAsciiEngine & engine ) :
dnsTransaction ( engine.createTransaction() ), nameLength ( 0 )
{
this->dnsTransaction.ipAddrToAscii ( addr, *this );
}
@@ -45,26 +46,38 @@ hostNameCache::~hostNameCache ()
this->dnsTransaction.release ();
}
void hostNameCache::transactionComplete ( const char *pHostNameIn )
void hostNameCache::transactionComplete ( const char * pHostNameIn )
{
epicsGuard < epicsMutex > guard ( this->mutex );
if ( ! this->ioComplete ) {
this->ioComplete = true;
if ( this->nameLength == 0u ) {
strncpy ( this->hostNameBuf, pHostNameIn, sizeof ( this->hostNameBuf ) );
this->hostNameBuf[ sizeof ( this->hostNameBuf ) - 1 ] = '\0';
this->nameLength = strlen ( this->hostNameBuf );
}
}
void hostNameCache::hostName ( char *pBuf, unsigned bufSize ) const
unsigned hostNameCache::getName (
char * pBuf, unsigned bufSize ) const
{
if ( bufSize == 0u ) {
return 0u;
}
epicsGuard < epicsMutex > guard ( this->mutex );
if ( this->ioComplete ) {
strncpy ( pBuf, this->hostNameBuf, bufSize);
pBuf [ bufSize - 1u ] = '\0';
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 ();
sockAddrToDottedIP ( &tmpAddr.sa, pBuf, bufSize );
return sockAddrToDottedIP ( &tmpAddr.sa, pBuf, bufSize );
}
}