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///////////////////////////////////////////////////////////////////////////// |
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// Name: src/common/fstream.cpp |
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// Purpose: "File stream" classes |
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// Author: Julian Smart |
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// Modified by: |
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// Created: 11/07/98 |
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// RCS-ID: $Id: wfstream.cpp 54418 2008-06-29 01:28:43Z VZ $ |
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// Copyright: (c) Guilhem Lavaux |
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// Licence: wxWindows licence |
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///////////////////////////////////////////////////////////////////////////// |
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|
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// For compilers that support precompilation, includes "wx.h". |
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#include "wx/wxprec.h" |
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|
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#ifdef __BORLANDC__ |
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#pragma hdrstop |
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#endif |
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|
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#if wxUSE_STREAMS |
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|
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#include "wx/wfstream.h" |
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|
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#ifndef WX_PRECOMP |
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#include "wx/stream.h" |
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#endif |
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|
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#include <stdio.h> |
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|
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#if wxUSE_FILE |
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|
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// ---------------------------------------------------------------------------- |
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// wxFileInputStream |
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// ---------------------------------------------------------------------------- |
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|
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wxFileInputStream::wxFileInputStream(const wxString& fileName) |
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: wxInputStream() |
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{ |
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m_file = new wxFile(fileName, wxFile::read); |
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m_file_destroy = true; |
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if ( !m_file->IsOpened() ) |
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m_lasterror = wxSTREAM_READ_ERROR; |
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} |
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|
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wxFileInputStream::wxFileInputStream() |
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: wxInputStream() |
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{ |
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m_file_destroy = false; |
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m_file = NULL; |
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} |
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|
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wxFileInputStream::wxFileInputStream(wxFile& file) |
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{ |
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m_file = &file; |
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m_file_destroy = false; |
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} |
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|
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wxFileInputStream::wxFileInputStream(int fd) |
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{ |
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m_file = new wxFile(fd); |
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m_file_destroy = true; |
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} |
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|
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wxFileInputStream::~wxFileInputStream() |
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{ |
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if (m_file_destroy) |
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delete m_file; |
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} |
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|
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wxFileOffset wxFileInputStream::GetLength() const |
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{ |
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return m_file->Length(); |
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} |
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|
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size_t wxFileInputStream::OnSysRead(void *buffer, size_t size) |
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{ |
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ssize_t ret = m_file->Read(buffer, size); |
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|
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// NB: we can't use a switch here because HP-UX CC doesn't allow |
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// switching over long long (which size_t is in 64bit mode) |
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|
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if ( !ret ) |
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{ |
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// nothing read, so nothing more to read |
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m_lasterror = wxSTREAM_EOF; |
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} |
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else if ( ret == wxInvalidOffset ) |
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{ |
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m_lasterror = wxSTREAM_READ_ERROR; |
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ret = 0; |
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} |
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else |
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{ |
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// normal case |
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m_lasterror = wxSTREAM_NO_ERROR; |
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} |
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|
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return ret; |
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} |
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|
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wxFileOffset wxFileInputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode) |
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{ |
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return m_file->Seek(pos, mode); |
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} |
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|
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wxFileOffset wxFileInputStream::OnSysTell() const |
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{ |
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return m_file->Tell(); |
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} |
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|
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bool wxFileInputStream::IsOk() const |
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{ |
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return (wxStreamBase::IsOk() && m_file->IsOpened()); |
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} |
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|
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// ---------------------------------------------------------------------------- |
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// wxFileOutputStream |
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// ---------------------------------------------------------------------------- |
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|
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wxFileOutputStream::wxFileOutputStream(const wxString& fileName) |
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{ |
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m_file = new wxFile(fileName, wxFile::write); |
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m_file_destroy = true; |
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|
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if (!m_file->IsOpened()) |
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m_lasterror = wxSTREAM_WRITE_ERROR; |
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} |
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|
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wxFileOutputStream::wxFileOutputStream(wxFile& file) |
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{ |
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m_file = &file; |
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m_file_destroy = false; |
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} |
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|
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wxFileOutputStream::wxFileOutputStream() |
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: wxOutputStream() |
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{ |
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m_file_destroy = false; |
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m_file = NULL; |
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} |
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|
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wxFileOutputStream::wxFileOutputStream(int fd) |
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{ |
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m_file = new wxFile(fd); |
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m_file_destroy = true; |
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} |
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|
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wxFileOutputStream::~wxFileOutputStream() |
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{ |
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if (m_file_destroy) |
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{ |
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Sync(); |
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delete m_file; |
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} |
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} |
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|
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size_t wxFileOutputStream::OnSysWrite(const void *buffer, size_t size) |
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{ |
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size_t ret = m_file->Write(buffer, size); |
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|
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m_lasterror = m_file->Error() ? wxSTREAM_WRITE_ERROR : wxSTREAM_NO_ERROR; |
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|
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return ret; |
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} |
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|
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wxFileOffset wxFileOutputStream::OnSysTell() const |
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{ |
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return m_file->Tell(); |
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} |
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|
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wxFileOffset wxFileOutputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode) |
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{ |
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return m_file->Seek(pos, mode); |
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} |
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|
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void wxFileOutputStream::Sync() |
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{ |
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wxOutputStream::Sync(); |
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m_file->Flush(); |
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} |
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|
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wxFileOffset wxFileOutputStream::GetLength() const |
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{ |
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return m_file->Length(); |
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} |
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|
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bool wxFileOutputStream::IsOk() const |
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{ |
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return (wxStreamBase::IsOk() && m_file->IsOpened()); |
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} |
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|
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// ---------------------------------------------------------------------------- |
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// wxTempFileOutputStream |
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// ---------------------------------------------------------------------------- |
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|
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wxTempFileOutputStream::wxTempFileOutputStream(const wxString& fileName) |
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{ |
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m_file = new wxTempFile(fileName); |
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|
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if (!m_file->IsOpened()) |
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m_lasterror = wxSTREAM_WRITE_ERROR; |
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} |
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|
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wxTempFileOutputStream::~wxTempFileOutputStream() |
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{ |
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if (m_file->IsOpened()) |
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Discard(); |
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delete m_file; |
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} |
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|
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size_t wxTempFileOutputStream::OnSysWrite(const void *buffer, size_t size) |
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{ |
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if (IsOk() && m_file->Write(buffer, size)) |
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return size; |
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m_lasterror = wxSTREAM_WRITE_ERROR; |
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return 0; |
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} |
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|
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// ---------------------------------------------------------------------------- |
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// wxFileStream |
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// ---------------------------------------------------------------------------- |
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|
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wxFileStream::wxFileStream(const wxString& fileName) |
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: wxFileInputStream(), |
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wxFileOutputStream() |
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{ |
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wxFileOutputStream::m_file = |
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wxFileInputStream::m_file = new wxFile(fileName, wxFile::read_write); |
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|
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// this is a bit ugly as streams are symmetric but we still have to delete |
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// the file we created above exactly once so we decide to (arbitrarily) do |
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// it in wxFileInputStream |
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wxFileInputStream::m_file_destroy = true; |
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} |
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|
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#endif //wxUSE_FILE |
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|
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#if wxUSE_FFILE |
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|
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// ---------------------------------------------------------------------------- |
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// wxFFileInputStream |
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// ---------------------------------------------------------------------------- |
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|
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wxFFileInputStream::wxFFileInputStream(const wxString& fileName, |
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const wxChar *mode) |
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: wxInputStream() |
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{ |
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m_file = new wxFFile(fileName, mode); |
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m_file_destroy = true; |
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|
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if (!m_file->IsOpened()) |
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m_lasterror = wxSTREAM_WRITE_ERROR; |
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} |
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|
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wxFFileInputStream::wxFFileInputStream() |
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: wxInputStream() |
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{ |
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m_file = NULL; |
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m_file_destroy = false; |
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} |
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|
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wxFFileInputStream::wxFFileInputStream(wxFFile& file) |
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{ |
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m_file = &file; |
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m_file_destroy = false; |
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} |
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|
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wxFFileInputStream::wxFFileInputStream(FILE *file) |
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{ |
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m_file = new wxFFile(file); |
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m_file_destroy = true; |
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} |
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|
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wxFFileInputStream::~wxFFileInputStream() |
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{ |
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if (m_file_destroy) |
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delete m_file; |
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} |
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|
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wxFileOffset wxFFileInputStream::GetLength() const |
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{ |
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return m_file->Length(); |
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} |
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|
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size_t wxFFileInputStream::OnSysRead(void *buffer, size_t size) |
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{ |
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ssize_t ret = m_file->Read(buffer, size); |
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|
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// It is not safe to call Eof() if the file is not opened. |
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if (!m_file->IsOpened() || m_file->Eof()) |
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m_lasterror = wxSTREAM_EOF; |
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if (ret == wxInvalidOffset) |
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{ |
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m_lasterror = wxSTREAM_READ_ERROR; |
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ret = 0; |
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} |
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|
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return ret; |
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} |
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|
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wxFileOffset wxFFileInputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode) |
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{ |
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return m_file->Seek(pos, mode) ? m_file->Tell() : wxInvalidOffset; |
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} |
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|
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wxFileOffset wxFFileInputStream::OnSysTell() const |
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{ |
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return m_file->Tell(); |
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} |
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|
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bool wxFFileInputStream::IsOk() const |
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{ |
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return (wxStreamBase::IsOk() && m_file->IsOpened()); |
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} |
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|
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// ---------------------------------------------------------------------------- |
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// wxFFileOutputStream |
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// ---------------------------------------------------------------------------- |
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|
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wxFFileOutputStream::wxFFileOutputStream(const wxString& fileName, |
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const wxChar *mode) |
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{ |
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m_file = new wxFFile(fileName, mode); |
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m_file_destroy = true; |
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|
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if (!m_file->IsOpened()) |
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{ |
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m_lasterror = wxSTREAM_WRITE_ERROR; |
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} |
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else |
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{ |
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if (m_file->Error()) |
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m_lasterror = wxSTREAM_WRITE_ERROR; |
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} |
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} |
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|
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wxFFileOutputStream::wxFFileOutputStream(wxFFile& file) |
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{ |
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m_file = &file; |
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m_file_destroy = false; |
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} |
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|
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wxFFileOutputStream::wxFFileOutputStream() |
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: wxOutputStream() |
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{ |
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m_file = NULL; |
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m_file_destroy = false; |
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} |
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|
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wxFFileOutputStream::wxFFileOutputStream(FILE *file) |
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{ |
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m_file = new wxFFile(file); |
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m_file_destroy = true; |
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} |
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|
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wxFFileOutputStream::~wxFFileOutputStream() |
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{ |
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if (m_file_destroy) |
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{ |
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Sync(); |
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delete m_file; |
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} |
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} |
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|
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size_t wxFFileOutputStream::OnSysWrite(const void *buffer, size_t size) |
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{ |
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size_t ret = m_file->Write(buffer, size); |
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// It is not safe to call Error() if the file is not opened. |
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if (!m_file->IsOpened() || m_file->Error()) |
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m_lasterror = wxSTREAM_WRITE_ERROR; |
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else |
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m_lasterror = wxSTREAM_NO_ERROR; |
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return ret; |
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} |
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|
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wxFileOffset wxFFileOutputStream::OnSysTell() const |
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{ |
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return m_file->Tell(); |
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} |
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|
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wxFileOffset wxFFileOutputStream::OnSysSeek(wxFileOffset pos, wxSeekMode mode) |
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{ |
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return m_file->Seek(pos, mode) ? m_file->Tell() : wxInvalidOffset; |
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} |
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|
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void wxFFileOutputStream::Sync() |
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{ |
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wxOutputStream::Sync(); |
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m_file->Flush(); |
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} |
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|
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wxFileOffset wxFFileOutputStream::GetLength() const |
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{ |
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return m_file->Length(); |
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} |
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|
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bool wxFFileOutputStream::IsOk() const |
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{ |
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return (wxStreamBase::IsOk() && m_file->IsOpened()); |
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} |
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|
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// ---------------------------------------------------------------------------- |
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// wxFFileStream |
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// ---------------------------------------------------------------------------- |
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|
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wxFFileStream::wxFFileStream(const wxString& fileName) |
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: wxFFileInputStream(), |
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wxFFileOutputStream() |
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{ |
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wxFFileOutputStream::m_file = |
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wxFFileInputStream::m_file = new wxFFile(fileName, _T("w+b")); |
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|
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// see comment in wxFileStream ctor |
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wxFFileInputStream::m_file_destroy = true; |
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} |
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|
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#endif //wxUSE_FFILE |
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|
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#endif // wxUSE_STREAMS |
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