const char *PamGetProxy( const char *pszOriginal )
{
InitProxyDB();
if( poProxyDB == NULL )
return NULL;
CPLMutexHolderD( &hProxyDBLock );
poProxyDB->CheckLoadDB();
for( unsigned int i = 0; i < poProxyDB->aosOriginalFiles.size(); i++ )
{
if( strcmp( poProxyDB->aosOriginalFiles[i], pszOriginal ) == 0 )
return poProxyDB->aosProxyFiles[i];
}
return NULL;
}
const char *PamAllocateProxy( const char *pszOriginal )
{
InitProxyDB();
if( poProxyDB == NULL )
return NULL;
CPLMutexHolderD( &hProxyDBLock );
poProxyDB->CheckLoadDB();
/* -------------------------------------------------------------------- */
/* Form the proxy filename based on the original path if */
/* possible, but dummy out any questionable characters, path */
/* delimiters and such. This is intended to make the proxy */
/* name be identifiable by folks digging around in the proxy */
/* database directory. */
/* */
/* We also need to be careful about length. */
/* -------------------------------------------------------------------- */
CPLString osRevProxyFile;
int i;
i = strlen(pszOriginal) - 1;
while( i >= 0 && osRevProxyFile.size() < 220 )
{
if( i > 6 && EQUALN(pszOriginal+i-5,":::OVR",6) )
i -= 6;
// make some effort to break long names at path delimiters.
if( (pszOriginal[i] == '/' || pszOriginal[i] == '\\')
&& osRevProxyFile.size() > 200 )
break;
if( (pszOriginal[i] >= 'A' && pszOriginal[i] <= 'Z')
|| (pszOriginal[i] >= 'a' && pszOriginal[i] <= 'z')
|| (pszOriginal[i] >= '0' && pszOriginal[i] <= '9')
|| pszOriginal[i] == '.' )
osRevProxyFile += pszOriginal[i];
else
osRevProxyFile += '_';
i--;
}
CPLString osOriginal = pszOriginal;
CPLString osProxy;
CPLString osCounter;
osProxy = poProxyDB->osProxyDBDir + "/";
osCounter.Printf( "%06d_", poProxyDB->nUpdateCounter++ );
osProxy += osCounter;
for( i = osRevProxyFile.size()-1; i >= 0; i-- )
osProxy += osRevProxyFile[i];
if( osOriginal.find(":::OVR") != CPLString::npos )
osProxy += ".ovr";
else
osProxy += ".aux.xml";
/* -------------------------------------------------------------------- */
/* Add the proxy and the original to the proxy list and resave */
/* the database. */
/* -------------------------------------------------------------------- */
poProxyDB->aosOriginalFiles.push_back( osOriginal );
poProxyDB->aosProxyFiles.push_back( osProxy );
poProxyDB->SaveDB();
return PamGetProxy( pszOriginal );
}
