/////////////////////////////////////////////////////////////////////////////
// Name: ffile.cpp
-// Purpose: wxFFile - encapsulates "FILE *" IO stream
+// Purpose: wxFFile encapsulates "FILE *" IO stream
// Author: Vadim Zeitlin
// Modified by:
// Created: 14.07.99
// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// ============================================================================
// headers
// ----------------------------------------------------------------------------
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
#pragma implementation "ffile.h"
#endif
#pragma hdrstop
#endif
-#if wxUSE_FILE
+#if wxUSE_FFILE
#ifndef WX_PRECOMP
#include "wx/intl.h"
// implementation
// ============================================================================
+// ----------------------------------------------------------------------------
+// seek and tell with large file support if available
+// ----------------------------------------------------------------------------
+
+#ifdef HAVE_FSEEKO
+# define wxFseek fseeko
+# define wxFtell ftello
+#else
+# define wxFseek fseek
+# define wxFtell ftell
+#endif
+
// ----------------------------------------------------------------------------
// opening the file
// ----------------------------------------------------------------------------
-wxFFile::wxFFile(const wxChar *filename, const char *mode)
+wxFFile::wxFFile(const wxChar *filename, const wxChar *mode)
{
Detach();
(void)Open(filename, mode);
}
-bool wxFFile::Open(const wxChar *filename, const char *mode)
+bool wxFFile::Open(const wxChar *filename, const wxChar *mode)
{
- wxASSERT_MSG( !m_fp, _T("should close or detach the old file first") );
+ wxASSERT_MSG( !m_fp, wxT("should close or detach the old file first") );
- m_fp = fopen(filename, mode);
+ m_fp = wxFopen(filename, mode);
if ( !m_fp )
{
wxLogSysError(_("can't open file '%s'"), filename);
- return FALSE;
+ return false;
}
m_name = filename;
- return TRUE;
+ return true;
}
bool wxFFile::Close()
{
wxLogSysError(_("can't close file '%s'"), m_name.c_str());
- return FALSE;
+ return false;
}
Detach();
}
- return TRUE;
+ return true;
}
// ----------------------------------------------------------------------------
// read/write
// ----------------------------------------------------------------------------
-bool wxFFile::ReadAll(wxString *str)
+bool wxFFile::ReadAll(wxString *str, wxMBConv& conv)
{
- wxCHECK_MSG( str, FALSE, _T("invalid parameter") );
- wxCHECK_MSG( IsOpened(), FALSE, _T("can't read from closed file") );
+ wxCHECK_MSG( str, false, wxT("invalid parameter") );
+ wxCHECK_MSG( IsOpened(), false, wxT("can't read from closed file") );
+ wxCHECK_MSG( Length() >= 0, false, wxT("invalid length") );
+ size_t length = (size_t)Length();
+ wxCHECK_MSG( (wxFileOffset)length == Length(), false, wxT("huge file not supported") );
clearerr(m_fp);
- str->Empty();
- str->Alloc(Length());
+ wxCharBuffer buf(length + 1);
- wxChar buf[1024];
- static const size_t nSize = WXSIZEOF(buf) - 1; // -1 for trailing '\0'
- while ( !Eof() )
- {
- size_t nRead = fread(buf, sizeof(wxChar), nSize, m_fp);
- if ( (nRead < nSize) && Error() )
- {
- wxLogSysError(_("Read error on file '%s'"), m_name.c_str());
+ // note that real length may be less than file length for text files with DOS EOLs
+ // ('\r's get dropped by CRT when reading which means that we have
+ // realLen = fileLen - numOfLinesInTheFile)
+ length = fread(buf.data(), sizeof(char), length, m_fp);
- return FALSE;
- }
- //else: just EOF
+ if ( Error() )
+ {
+ wxLogSysError(_("Read error on file '%s'"), m_name.c_str());
- buf[nRead] = 0;
- *str += buf;
+ return false;
}
- return TRUE;
+ buf.data()[length] = 0;
+ *str = wxString(buf, conv);
+
+ return true;
}
size_t wxFFile::Read(void *pBuf, size_t nCount)
{
- wxCHECK_MSG( pBuf, FALSE, _T("invalid parameter") );
- wxCHECK_MSG( IsOpened(), FALSE, _T("can't read from closed file") );
+ wxCHECK_MSG( pBuf, 0, wxT("invalid parameter") );
+ wxCHECK_MSG( IsOpened(), 0, wxT("can't read from closed file") );
size_t nRead = fread(pBuf, 1, nCount, m_fp);
if ( (nRead < nCount) && Error() )
size_t wxFFile::Write(const void *pBuf, size_t nCount)
{
- wxCHECK_MSG( pBuf, FALSE, _T("invalid parameter") );
- wxCHECK_MSG( IsOpened(), FALSE, _T("can't write to closed file") );
+ wxCHECK_MSG( pBuf, 0, wxT("invalid parameter") );
+ wxCHECK_MSG( IsOpened(), 0, wxT("can't write to closed file") );
size_t nWritten = fwrite(pBuf, 1, nCount, m_fp);
if ( nWritten < nCount )
{
if ( IsOpened() )
{
- if ( !fflush(m_fp) )
+ // fflush returns non-zero on error
+ //
+ if ( fflush(m_fp) )
{
wxLogSysError(_("failed to flush the file '%s'"), m_name.c_str());
- return FALSE;
+ return false;
}
}
- return TRUE;
+ return true;
}
// ----------------------------------------------------------------------------
// seeking
// ----------------------------------------------------------------------------
-bool wxFFile::Seek(long ofs, wxSeekMode mode)
+bool wxFFile::Seek(wxFileOffset ofs, wxSeekMode mode)
{
- wxCHECK_MSG( IsOpened(), FALSE, _T("can't seek on closed file") );
+ wxCHECK_MSG( IsOpened(), false, wxT("can't seek on closed file") );
int origin;
switch ( mode )
{
default:
- wxFAIL_MSG(_T("unknown seek mode"));
+ wxFAIL_MSG(wxT("unknown seek mode"));
// still fall through
case wxFromStart:
break;
}
- if ( fseek(m_fp, ofs, origin) != 0 )
+#ifndef HAVE_FSEEKO
+ if ((long)ofs != ofs)
+ {
+ wxLogError(_("Seek error on file '%s' (large files not supported by stdio)"), m_name.c_str());
+
+ return false;
+ }
+
+ if ( wxFseek(m_fp, (long)ofs, origin) != 0 )
+#else
+ if ( wxFseek(m_fp, ofs, origin) != 0 )
+#endif
{
wxLogSysError(_("Seek error on file '%s'"), m_name.c_str());
- return FALSE;
+ return false;
}
- return TRUE;
+ return true;
}
-size_t wxFFile::Tell() const
+wxFileOffset wxFFile::Tell() const
{
- long rc = ftell(m_fp);
- if ( rc == -1 )
+ wxCHECK_MSG( IsOpened(), wxInvalidOffset,
+ _T("wxFFile::Tell(): file is closed!") );
+
+ wxFileOffset rc = wxFtell(m_fp);
+ if ( rc == wxInvalidOffset )
{
wxLogSysError(_("Can't find current position in file '%s'"),
m_name.c_str());
}
- return (size_t)rc;
+ return rc;
}
-size_t wxFFile::Length() const
+wxFileOffset wxFFile::Length() const
{
+ wxCHECK_MSG( IsOpened(), wxInvalidOffset,
+ _T("wxFFile::Length(): file is closed!") );
+
wxFFile& self = *(wxFFile *)this; // const_cast
- size_t posOld = Tell();
- if ( posOld != (size_t)-1 )
+ wxFileOffset posOld = Tell();
+ if ( posOld != wxInvalidOffset )
{
if ( self.SeekEnd() )
{
- size_t len = Tell();
+ wxFileOffset len = Tell();
(void)self.Seek(posOld);
}
}
- return (size_t)-1;
+ return wxInvalidOffset;
}
-#endif // wxUSE_FILE
+#endif // wxUSE_FFILE
projects / wxWidgets.git / blobdiff