//<"LSCH"><CeHeader><CacheKey><ResponseHeader><ResponseBody>
int DirHashCacheEntry::loadCeHeader()
{
int fd = getFdStore();
if ( fd == -1 )
{
errno = EBADF;
return -1;
}
if ( nio_lseek( fd, getStartOffset(), SEEK_SET ) == -1 )
return -1;
char achBuf[4 + sizeof( CeHeader ) ];
if ( (size_t)nio_read( fd, achBuf, 4 + sizeof( CeHeader ) )
< 4 + sizeof( CeHeader ) )
return -1;
// if ( *( uint32_t *)achBuf != CE_ID )
// return -1;
if (memcmp(achBuf, CE_ID, 4) != 0)
return -1;
memmove( &getHeader(), &achBuf[4], sizeof( CeHeader ) );
int len = getHeader().m_keyLen;
if ( len > 0 )
{
char * p = getKey().prealloc( len+1 );
if ( !p )
return -1;
if ( nio_read( fd, p, len ) < len )
return -1;
*(p+len) = 0;
}
char tmpBUf[4096];
#ifdef CACHE_RESP_HEADER
if (getHeader().m_valPart1Len < 4096 ) //< 4K
{
if ( nio_read( fd, tmpBUf, getHeader().m_valPart1Len ) < getHeader().m_valPart1Len )
return -1;
m_sRespHeader.append(tmpBUf, getHeader().m_valPart1Len);
}
#endif
//load part3 to buffer
int part3offset = getHeaderSize() + getContentTotalLen();
if ( nio_lseek( fd, part3offset, SEEK_SET ) != -1 )
{
while((len = nio_read( fd, tmpBUf, 4096 )) > 0)
m_sPart3Buf.append(tmpBUf, len);
}
return 0;
}
const char * FileCacheDataEx::getCacheData(
off_t offset, off_t& wanted, char *pBuf, long len )
{
if ( isCached() )
{
if ( offset > m_lSize )
{
wanted = 0;
return pBuf;
}
if ( wanted > m_lSize - offset )
wanted = m_lSize - offset;
return m_pCache + offset;
}
else
{
assert( m_fd != -1 );
off_t off = nio_lseek( m_fd, offset, SEEK_SET );
/* if ( D_ENABLED( DL_MORE ))
LOG_D(( "lseek() return %d", (int)off ));*/
if ( off == offset )
{
wanted = nio_read( m_fd, pBuf, len );
}
else
{
wanted = -1;
}
return pBuf;
}
}
int DirHashCacheEntry::saveCeHeader()
{
int fd = getFdStore();
if ( fd == -1 )
{
errno = EBADF;
return -1;
}
if ( nio_lseek( fd, getStartOffset(), SEEK_SET ) == -1 )
return -1;
char achBuf[4 + sizeof( CeHeader ) ];
//*( int *)achBuf = CE_ID;
memcpy(achBuf, CE_ID, 4);
memmove( &achBuf[4], &getHeader(), sizeof( CeHeader ) );
if ( (size_t)nio_write( fd, achBuf, 4 + sizeof( CeHeader ) ) <
4 + sizeof( CeHeader ) )
return -1;
if ( getHeader().m_keyLen > 0 )
{
if ( nio_write( fd, getKey().c_str(), getHeader().m_keyLen ) <
getHeader().m_keyLen )
return -1;
}
return 0;
}
