/////////////////////////////////////////////////////////////////////////////
-// Name: file.cpp
+// Name: src/common/file.cpp
// Purpose: wxFile - encapsulates low-level "file descriptor"
// wxTempFile
// Author: Vadim Zeitlin
// Modified by:
// Created: 29/01/98
-// RCS-ID: $Id$
// Copyright: (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// headers
// ----------------------------------------------------------------------------
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
- #pragma implementation "file.h"
-#endif
-
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#if wxUSE_FILE
// standard
-#if defined(__WXMSW__) && !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
-
-#ifndef __SALFORDC__
- #define WIN32_LEAN_AND_MEAN
- #define NOSERVICE
- #define NOIME
- #define NOATOM
- #define NOGDI
- #define NOGDICAPMASKS
- #define NOMETAFILE
- #define NOMINMAX
- #define NOMSG
- #define NOOPENFILE
- #define NORASTEROPS
- #define NOSCROLL
- #define NOSOUND
- #define NOSYSMETRICS
- #define NOTEXTMETRIC
- #define NOWH
- #define NOCOMM
- #define NOKANJI
- #define NOCRYPT
- #define NOMCX
-#endif
-
-#elif defined(__WXMSW__) && defined(__WXWINCE__)
+#if defined(__WINDOWS__) && !defined(__GNUWIN32__) && !defined(__WXMICROWIN__) && !defined(__WXWINCE__)
+
+#define WIN32_LEAN_AND_MEAN
+#define NOSERVICE
+#define NOIME
+#define NOATOM
+#define NOGDI
+#define NOGDICAPMASKS
+#define NOMETAFILE
+#define NOMINMAX
+#define NOMSG
+#define NOOPENFILE
+#define NORASTEROPS
+#define NOSCROLL
+#define NOSOUND
+#define NOSYSMETRICS
+#define NOTEXTMETRIC
+#define NOWH
+#define NOCOMM
+#define NOKANJI
+#define NOCRYPT
+#define NOMCX
+
+#elif defined(__WINDOWS__) && defined(__WXWINCE__)
#include "wx/msw/missing.h"
#elif (defined(__OS2__))
#include <io.h>
#include <stdio.h> // SEEK_xxx constants
+#ifndef __WXWINCE__
+ #include <errno.h>
+#endif
+
// Windows compilers don't have these constants
#ifndef W_OK
enum
};
#endif // W_OK
-// there is no distinction between text and binary files under Unix, so define
-// O_BINARY as 0 if the system headers don't do it already
-#if defined(__UNIX__) && !defined(O_BINARY)
- #define O_BINARY (0)
-#endif //__UNIX__
-
-#ifdef __SALFORDC__
- #include <unix.h>
-#endif
-
-#ifndef MAX_PATH
- #define MAX_PATH 512
-#endif
-
-// some broken compilers don't have 3rd argument in open() and creat()
-#ifdef __SALFORDC__
- #define ACCESS(access)
- #define stat _stat
-#else // normal compiler
- #define ACCESS(access) , (access)
-#endif // Salford C
-
// wxWidgets
#ifndef WX_PRECOMP
#include "wx/string.h"
#include "wx/intl.h"
#include "wx/log.h"
+ #include "wx/crt.h"
#endif // !WX_PRECOMP
#include "wx/filename.h"
#include "wx/file.h"
#include "wx/filefn.h"
-#ifdef __WXMSW__
+// there is no distinction between text and binary files under Unix, so define
+// O_BINARY as 0 if the system headers don't do it already
+#if defined(__UNIX__) && !defined(O_BINARY)
+ #define O_BINARY (0)
+#endif //__UNIX__
+
+#ifdef __WINDOWS__
#include "wx/msw/mslu.h"
#endif
#include "wx/msw/private.h"
#endif
+#ifndef MAX_PATH
+ #define MAX_PATH 512
+#endif
+
// ============================================================================
// implementation of wxFile
// ============================================================================
// static functions
// ----------------------------------------------------------------------------
-bool wxFile::Exists(const wxChar *name)
+bool wxFile::Exists(const wxString& name)
{
return wxFileExists(name);
}
-bool wxFile::Access(const wxChar *name, OpenMode mode)
+bool wxFile::Access(const wxString& name, OpenMode mode)
{
int how;
// ----------------------------------------------------------------------------
// ctors
-wxFile::wxFile(const wxChar *szFileName, OpenMode mode)
+wxFile::wxFile(const wxString& fileName, OpenMode mode)
{
m_fd = fd_invalid;
- m_error = false;
+ m_lasterror = 0;
+
+ Open(fileName, mode);
+}
+
+bool wxFile::CheckForError(wxFileOffset rc) const
+{
+ if ( rc != -1 )
+ return false;
- Open(szFileName, mode);
+ const_cast<wxFile *>(this)->m_lasterror =
+#ifndef __WXWINCE__
+ errno
+#else
+ ::GetLastError()
+#endif
+ ;
+
+ return true;
}
// create the file, fail if it already exists and bOverwrite
-bool wxFile::Create(const wxChar *szFileName, bool bOverwrite, int accessMode)
+bool wxFile::Create(const wxString& fileName, bool bOverwrite, int accessMode)
{
// if bOverwrite we create a new file or truncate the existing one,
// otherwise we only create the new file and fail if it already exists
-#if defined(__WXMAC__) && !defined(__UNIX__) && !wxUSE_UNICODE
- // Dominic Mazzoni [dmazzoni+@cs.cmu.edu] reports that open is still broken on the mac, so we replace
- // int fd = open( szFileName , O_CREAT | (bOverwrite ? O_TRUNC : O_EXCL), access);
- int fd = creat( szFileName , accessMode);
-#else
- int fd = wxOpen( szFileName,
+ int fildes = wxOpen( fileName,
O_BINARY | O_WRONLY | O_CREAT |
- (bOverwrite ? O_TRUNC : O_EXCL)
- ACCESS(accessMode) );
-#endif
- if ( fd == -1 )
+ (bOverwrite ? O_TRUNC : O_EXCL),
+ accessMode );
+ if ( CheckForError(fildes) )
{
- wxLogSysError(_("can't create file '%s'"), szFileName);
+ wxLogSysError(_("can't create file '%s'"), fileName);
return false;
}
- else
- {
- Attach(fd);
- return true;
- }
+
+ Attach(fildes);
+ return true;
}
// open the file
-bool wxFile::Open(const wxChar *szFileName, OpenMode mode, int accessMode)
+bool wxFile::Open(const wxString& fileName, OpenMode mode, int accessMode)
{
int flags = O_BINARY;
break;
case write_append:
- if ( wxFile::Exists(szFileName) )
+ if ( wxFile::Exists(fileName) )
{
flags |= O_WRONLY | O_APPEND;
break;
accessMode &= wxS_IRUSR | wxS_IWUSR;
#endif // __WINDOWS__
- int fd = wxOpen( szFileName, flags ACCESS(accessMode));
+ int fildes = wxOpen( fileName, flags, accessMode);
- if ( fd == -1 )
+ if ( CheckForError(fildes) )
{
- wxLogSysError(_("can't open file '%s'"), szFileName);
+ wxLogSysError(_("can't open file '%s'"), fileName);
return false;
}
- else {
- Attach(fd);
- return true;
- }
+
+ Attach(fildes);
+ return true;
}
// close
bool wxFile::Close()
{
if ( IsOpened() ) {
- if (wxClose(m_fd) == -1)
+ if ( CheckForError(wxClose(m_fd)) )
{
wxLogSysError(_("can't close file descriptor %d"), m_fd);
m_fd = fd_invalid;
// read/write
// ----------------------------------------------------------------------------
+bool wxFile::ReadAll(wxString *str, const wxMBConv& conv)
+{
+ wxCHECK_MSG( str, false, wxS("Output string must be non-NULL") );
+
+ ssize_t length = Length();
+ wxCHECK_MSG( (wxFileOffset)length == Length(), false, wxT("huge file not supported") );
+
+ wxCharBuffer buf(length);
+ char* p = buf.data();
+ for ( ;; )
+ {
+ static const ssize_t READSIZE = 4096;
+
+ ssize_t nread = Read(p, length > READSIZE ? READSIZE : length);
+ if ( nread == wxInvalidOffset )
+ return false;
+
+ p += nread;
+ if ( length <= nread )
+ break;
+
+ length -= nread;
+ }
+
+ *p = 0;
+
+ wxString strTmp(buf, conv);
+ str->swap(strTmp);
+
+ return true;
+}
+
// read
-size_t wxFile::Read(void *pBuf, size_t nCount)
+ssize_t wxFile::Read(void *pBuf, size_t nCount)
{
wxCHECK( (pBuf != NULL) && IsOpened(), 0 );
- int iRc = wxRead(m_fd, pBuf, nCount);
+ ssize_t iRc = wxRead(m_fd, pBuf, nCount);
- if ( iRc == -1 ) {
+ if ( CheckForError(iRc) )
+ {
wxLogSysError(_("can't read from file descriptor %d"), m_fd);
- return (size_t)wxInvalidOffset;
+ return wxInvalidOffset;
}
- else
- return (size_t)iRc;
+
+ return iRc;
}
// write
{
wxCHECK( (pBuf != NULL) && IsOpened(), 0 );
- int iRc = wxWrite(m_fd, pBuf, nCount);
+ ssize_t iRc = wxWrite(m_fd, pBuf, nCount);
- if ( iRc == -1 ) {
+ if ( CheckForError(iRc) )
+ {
wxLogSysError(_("can't write to file descriptor %d"), m_fd);
- m_error = true;
- return 0;
+ iRc = 0;
}
- else
- return iRc;
+
+ return iRc;
+}
+
+bool wxFile::Write(const wxString& s, const wxMBConv& conv)
+{
+ const wxWX2MBbuf buf = s.mb_str(conv);
+ if ( !buf )
+ return false;
+
+#if wxUSE_UNICODE
+ const size_t size = buf.length();
+#else
+ const size_t size = s.length();
+#endif
+
+ return Write(buf, size) == size;
}
// flush
bool wxFile::Flush()
{
- if ( IsOpened() ) {
-#if defined(__VISUALC__) || wxHAVE_FSYNC
- if ( wxFsync(m_fd) == -1 )
+#ifdef HAVE_FSYNC
+ // fsync() only works on disk files and returns errors for pipes, don't
+ // call it then
+ if ( IsOpened() && GetKind() == wxFILE_KIND_DISK )
+ {
+ if ( CheckForError(wxFsync(m_fd)) )
{
wxLogSysError(_("can't flush file descriptor %d"), m_fd);
return false;
}
-#else // no fsync
- // just do nothing
-#endif // fsync
}
+#endif // HAVE_FSYNC
return true;
}
// seek
wxFileOffset wxFile::Seek(wxFileOffset ofs, wxSeekMode mode)
{
- wxASSERT( IsOpened() );
+ wxASSERT_MSG( IsOpened(), wxT("can't seek on closed file") );
+ wxCHECK_MSG( ofs != wxInvalidOffset || mode != wxFromStart,
+ wxInvalidOffset,
+ wxT("invalid absolute file offset") );
int origin;
switch ( mode ) {
default:
- wxFAIL_MSG(_("unknown seek origin"));
+ wxFAIL_MSG(wxT("unknown seek origin"));
case wxFromStart:
origin = SEEK_SET;
break;
}
- if (ofs == wxInvalidOffset)
- {
- wxLogSysError(_("can't seek on file descriptor %d, large files support is not enabled."), m_fd);
- return wxInvalidOffset;
- }
wxFileOffset iRc = wxSeek(m_fd, ofs, origin);
- if ( iRc == -1 ) {
+ if ( CheckForError(iRc) )
+ {
wxLogSysError(_("can't seek on file descriptor %d"), m_fd);
- return wxInvalidOffset;
}
- else
- return iRc;
+
+ return iRc;
}
-// get current wxFileOffset
+// get current file offset
wxFileOffset wxFile::Tell() const
{
wxASSERT( IsOpened() );
wxFileOffset iRc = wxTell(m_fd);
- if ( iRc == -1 ) {
+ if ( CheckForError(iRc) )
+ {
wxLogSysError(_("can't get seek position on file descriptor %d"), m_fd);
- return wxInvalidOffset;
}
- else
- return iRc;
+
+ return iRc;
}
// get current file length
{
wxASSERT( IsOpened() );
+ // we use a special method for Linux systems where files in sysfs (i.e.
+ // those under /sys typically) return length of 4096 bytes even when
+ // they're much smaller -- this is a problem as it results in errors later
+ // when we try reading 4KB from them
+#ifdef __LINUX__
+ struct stat st;
+ if ( fstat(m_fd, &st) == 0 )
+ {
+ // returning 0 for the special files indicates to the caller that they
+ // are not seekable
+ return st.st_blocks ? st.st_size : 0;
+ }
+ //else: failed to stat, try the normal method
+#endif // __LINUX__
+
wxFileOffset iRc = Tell();
- if ( iRc != -1 ) {
- // @ have to use const_cast :-(
- wxFileOffset iLen = ((wxFile *)this)->SeekEnd();
- if ( iLen != -1 ) {
+ if ( iRc != wxInvalidOffset ) {
+ wxFileOffset iLen = const_cast<wxFile *>(this)->SeekEnd();
+ if ( iLen != wxInvalidOffset ) {
// restore old position
- if ( ((wxFile *)this)->Seek(iRc) == -1 ) {
+ if ( ((wxFile *)this)->Seek(iRc) == wxInvalidOffset ) {
// error
- iLen = -1;
+ iLen = wxInvalidOffset;
}
}
iRc = iLen;
}
- if ( iRc == -1 ) {
+ if ( iRc == wxInvalidOffset )
+ {
+ // last error was already set by Tell()
wxLogSysError(_("can't find length of file on file descriptor %d"), m_fd);
- return wxInvalidOffset;
}
- else
- return iRc;
+
+ return iRc;
}
// is end of file reached?
{
wxASSERT( IsOpened() );
- int iRc;
+ wxFileOffset iRc;
-#if defined(__DOS__) || defined(__UNIX__) || defined(__GNUWIN32__) || defined( __MWERKS__ ) || defined(__SALFORDC__)
+#if defined(__DOS__) || defined(__UNIX__) || defined(__GNUWIN32__)
// @@ this doesn't work, of course, on unseekable file descriptors
wxFileOffset ofsCur = Tell(),
ofsMax = Length();
if ( ofsCur == wxInvalidOffset || ofsMax == wxInvalidOffset )
- iRc = -1;
+ iRc = wxInvalidOffset;
else
iRc = ofsCur == ofsMax;
#else // Windows and "native" compiler
iRc = wxEof(m_fd);
#endif // Windows/Unix
- switch ( iRc ) {
- case 1:
- break;
-
- case 0:
- return false;
-
- case -1:
- wxLogSysError(_("can't determine if the end of file is reached on descriptor %d"), m_fd);
- break;
+ if ( iRc == 0 )
+ return false;
- default:
- wxFAIL_MSG(_("invalid eof() return value."));
+ if ( iRc == wxInvalidOffset )
+ {
+ wxLogSysError(_("can't determine if the end of file is reached on descriptor %d"), m_fd);
}
return true;
{
m_file.Close();
if ( wxRemove(m_strTemp) != 0 )
+ {
wxLogSysError(_("can't remove temporary file '%s'"), m_strTemp.c_str());
+ }
}
#endif // wxUSE_FILE
projects / wxWidgets.git / blobdiff