docbook/libxml2/xmlIO.c

1205  * @buff:  Compressed memory buffer
1212 append_reverse_ulong( xmlZMemBuff * buff, unsigned long data ) {
1216     if ( buff == NULL )
1227 	*buff->zctrl.next_out = ( data & 0xff );
1229 	buff->zctrl.next_out++;
1238  * @buff:  The memory buffer context to clear
1243 xmlFreeZMemBuff( xmlZMemBuffPtr buff ) {
1249     if ( buff == NULL )
1252     xmlFree( buff->zbuff );
1254     z_err = deflateEnd( &buff->zctrl );
1260     deflateEnd( &buff->zctrl );
1263     xmlFree( buff );
1282     xmlZMemBuffPtr	buff = NULL;
1289     buff = xmlMalloc( sizeof( xmlZMemBuff ) );
1290     if ( buff == NULL ) {
1295     (void)memset( buff, 0, sizeof( xmlZMemBuff ) );
1296     buff->size = INIT_HTTP_BUFF_SIZE;
1297     buff->zbuff = xmlMalloc( buff->size );
1298     if ( buff->zbuff == NULL ) {
1299 	xmlFreeZMemBuff( buff );
1304     z_err = deflateInit2( &buff->zctrl, compression, Z_DEFLATED,
1308 	xmlFreeZMemBuff( buff );
1309 	buff = NULL;
1319     buff->crc = crc32( 0L, NULL, 0 );
1320     hdr_lgth = snprintf( (char *)buff->zbuff, buff->size,
1324     buff->zctrl.next_out  = buff->zbuff + hdr_lgth;
1325     buff->zctrl.avail_out = buff->size - hdr_lgth;
1327     return ( buff );
1332  * @buff:  Buffer used to compress and consolidate data.
1342 xmlZMemBuffExtend( xmlZMemBuffPtr buff, size_t ext_amt ) {
1350     if ( buff == NULL )
1356     cur_used = buff->zctrl.next_out - buff->zbuff;
1357     new_size = buff->size + ext_amt;
1368     tmp_ptr = xmlRealloc( buff->zbuff, new_size );
1371 	buff->size  = new_size;
1372 	buff->zbuff = tmp_ptr;
1373 	buff->zctrl.next_out  = tmp_ptr + cur_used;
1374 	buff->zctrl.avail_out = new_size - cur_used;
1390  * @buff:  Buffer used to compress and consolidate data
1400 xmlZMemBuffAppend( xmlZMemBuffPtr buff, const char * src, int len ) {
1405     if ( ( buff == NULL ) || ( src == NULL ) )
1408     buff->zctrl.avail_in = len;
1409     buff->zctrl.next_in  = (unsigned char *)src;
1410     while ( buff->zctrl.avail_in > 0 ) {
1415 	min_accept = buff->zctrl.avail_in / DFLT_ZLIB_RATIO;
1416 	if ( buff->zctrl.avail_out <= min_accept ) {
1417 	    if ( xmlZMemBuffExtend( buff, buff->size ) == -1 )
1421 	z_err = deflate( &buff->zctrl, Z_NO_FLUSH );
1433     buff->crc = crc32( buff->crc, (unsigned char *)src, len );
1440  * @buff:  Compressed memory content buffer
1450 xmlZMemBuffGetContent( xmlZMemBuffPtr buff, char ** data_ref ) {
1455     if ( ( buff == NULL ) || ( data_ref == NULL ) )
1462 	z_err = deflate( &buff->zctrl, Z_FINISH );
1466 	    if ( xmlZMemBuffExtend( buff, buff->size ) == -1 )
1478 	if ( buff->zctrl.avail_out < ( 2 * sizeof( unsigned long ) ) ) {
1479 	    if ( xmlZMemBuffExtend(buff, (2 * sizeof(unsigned long))) == -1 )
1488 	append_reverse_ulong( buff, buff->crc );
1489 	append_reverse_ulong( buff, buff->zctrl.total_in );
1491 	zlgth = buff->zctrl.next_out - buff->zbuff;
1492 	*data_ref = (char *)buff->zbuff;