271 lines
6.9 KiB
C++
271 lines
6.9 KiB
C++
/*------------------------------------------------------------------------------
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Copyright (c) 2000 Tyrell Corporation. All rights reserved.
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Tyrell DarkIce
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File : FileSource.cpp
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Version : $Revision$
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Author : $Author$
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Location : $Source$
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Copyright notice:
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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------------------------------------------------------------------------------*/
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/* ============================================================ include files */
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#ifdef HAVE_CONFIG_H
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#include "configure.h"
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#else
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#error need unistd.h
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#endif
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#ifdef HAVE_SYS_TYPES_H
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#include <sys/types.h>
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#else
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#error need sys/types.h
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#endif
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#ifdef HAVE_SYS_STAT_H
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#include <sys/stat.h>
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#else
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#error need sys/stat.h
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#endif
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#ifdef HAVE_FCNTL_H
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#include <fcntl.h>
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#else
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#error need fcntl.h
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#endif
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#ifdef HAVE_SYS_TIME_H
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#include <sys/time.h>
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#else
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#error need sys/time.h
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#endif
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#include "Exception.h"
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#include "Util.h"
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#include "FileSource.h"
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/* =================================================== local data structures */
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/* ================================================ local constants & macros */
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/*------------------------------------------------------------------------------
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* File identity
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*----------------------------------------------------------------------------*/
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static const char fileid[] = "$Id$";
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/* =============================================== local function prototypes */
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/* ============================================================= module code */
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/*------------------------------------------------------------------------------
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* Initialize the object
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*----------------------------------------------------------------------------*/
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void
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FileSource :: init ( const char * name ) throw ( Exception )
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{
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fileName = Util::strDup( name);
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fileDescriptor = 0;
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}
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/*------------------------------------------------------------------------------
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* De-initialize the object
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*----------------------------------------------------------------------------*/
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void
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FileSource :: strip ( void ) throw ( Exception )
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{
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if ( isOpen() ) {
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close();
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}
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delete[] fileName;
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fileDescriptor = 0;
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}
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/*------------------------------------------------------------------------------
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* Copy Constructor
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*----------------------------------------------------------------------------*/
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FileSource :: FileSource ( const FileSource & fs ) throw ( Exception )
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{
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init( fs.fileName);
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fileDescriptor = fs.fileDescriptor ? dup( fs.fileDescriptor) : 0;
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if ( fileDescriptor == -1 ) {
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strip();
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throw Exception( __FILE__, __LINE__, "dup failure");
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}
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}
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/*------------------------------------------------------------------------------
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* Assignment operator
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*----------------------------------------------------------------------------*/
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FileSource &
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FileSource :: operator= ( const FileSource & fs ) throw ( Exception )
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{
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if ( this != &fs ) {
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init( fs.fileName);
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fileDescriptor = fs.fileDescriptor ? dup( fs.fileDescriptor) : 0;
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if ( fileDescriptor == -1 ) {
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strip();
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throw Exception( __FILE__, __LINE__, "dup failure");
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}
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}
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return *this;
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}
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/*------------------------------------------------------------------------------
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* Check wether a file exists
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*----------------------------------------------------------------------------*/
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bool
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FileSource :: exists ( void ) const throw ()
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{
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struct stat st;
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if ( stat( (const char*)fileName, &st) == -1 ) {
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return false;
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}
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return true;
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}
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/*------------------------------------------------------------------------------
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* Open the source
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*----------------------------------------------------------------------------*/
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bool
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FileSource :: open ( void ) throw ( Exception )
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{
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if ( isOpen() ) {
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return false;
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}
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if ( (fileDescriptor = ::open( fileName, O_RDONLY)) == -1 ) {
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fileDescriptor = 0;
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return false;
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}
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return true;
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}
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/*------------------------------------------------------------------------------
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* Check wether read() would return anything
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*----------------------------------------------------------------------------*/
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bool
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FileSource :: canRead ( unsigned int sec,
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unsigned int usec ) throw ( Exception )
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{
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fd_set fdset;
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struct timeval tv;
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int ret;
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if ( !isOpen() ) {
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return false;
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}
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FD_ZERO( &fdset);
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FD_SET( fileDescriptor, &fdset);
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tv.tv_sec = sec;
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tv.tv_usec = usec;
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ret = select( fileDescriptor + 1, &fdset, NULL, NULL, &tv);
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if ( ret == -1 ) {
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throw Exception( __FILE__, __LINE__, "select error");
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}
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return ret > 0;
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}
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/*------------------------------------------------------------------------------
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* Read from the audio source
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*----------------------------------------------------------------------------*/
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unsigned int
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FileSource :: read ( void * buf,
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unsigned int len ) throw ( Exception )
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{
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ssize_t ret;
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if ( !isOpen() ) {
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return 0;
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}
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ret = ::read( fileDescriptor, buf, len);
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if ( ret == -1 ) {
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throw Exception( __FILE__, __LINE__, "read error");
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}
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return ret;
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}
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/*------------------------------------------------------------------------------
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* Close the audio source
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*----------------------------------------------------------------------------*/
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void
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FileSource :: close ( void ) throw ( Exception )
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{
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if ( !isOpen() ) {
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return;
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}
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::close( fileDescriptor);
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fileDescriptor = 0;
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}
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/*------------------------------------------------------------------------------
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$Source$
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$Log$
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Revision 1.3 2000/11/12 13:31:40 darkeye
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added kdoc-style documentation comments
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Revision 1.2 2000/11/05 14:08:27 darkeye
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changed builting to an automake / autoconf environment
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Revision 1.1.1.1 2000/11/05 10:05:51 darkeye
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initial version
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------------------------------------------------------------------------------*/
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