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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
* This file is part of the LibreOffice project.
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* This file incorporates work covered by the following license notice:
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed
* with this work for additional information regarding copyright
* ownership. The ASF licenses this file to you under the Apache
* License, Version 2.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.apache.org/licenses/LICENSE-2.0 .
*/
#include <systools/win32/uwinapi.h>
#include <osl/file.h>
#include <o3tl/char16_t2wchar_t.hxx>
#include "file-impl.hxx"
#include "file_error.hxx"
#include "file_url.hxx"
#include "path_helper.hxx"
#include <malloc.h>
#include <cassert>
// Allocate n number of t's on the stack return a pointer to it in p
#define STACK_ALLOC(p, t, n) __try {(p) = static_cast<t*>(_alloca((n)*sizeof(t)));} \
__except(EXCEPTION_EXECUTE_HANDLER) {(p) = nullptr;}
// Temp file functions
static oslFileError osl_setup_base_directory_impl_(
rtl_uString* pustrDirectoryURL,
rtl_uString** ppustr_base_dir)
{
rtl_uString* dir_url = nullptr;
rtl_uString* dir = nullptr;
oslFileError error = osl_File_E_None;
if (pustrDirectoryURL)
rtl_uString_assign(&dir_url, pustrDirectoryURL);
else
error = osl_getTempDirURL(&dir_url);
if (error == osl_File_E_None)
{
error = osl_getSystemPathFromFileURL_(dir_url, &dir, false);
rtl_uString_release(dir_url);
}
if (error == osl_File_E_None)
{
rtl_uString_assign(ppustr_base_dir, dir);
rtl_uString_release(dir);
}
return error;
}
static oslFileError osl_setup_createTempFile_impl_(
rtl_uString* pustrDirectoryURL,
oslFileHandle* pHandle,
rtl_uString** ppustrTempFileURL,
rtl_uString** ppustr_base_dir,
sal_Bool* b_delete_on_close)
{
oslFileError osl_error;
OSL_PRECOND(((pHandle != nullptr) || (ppustrTempFileURL != nullptr)), "Invalid parameter!");
if ((pHandle == nullptr) && (ppustrTempFileURL == nullptr))
{
osl_error = osl_File_E_INVAL;
}
else
{
osl_error = osl_setup_base_directory_impl_(
pustrDirectoryURL, ppustr_base_dir);
*b_delete_on_close = (ppustrTempFileURL == nullptr);
}
return osl_error;
}
static oslFileError osl_win32_GetTempFileName_impl_(
rtl_uString* base_directory, LPWSTR temp_file_name)
{
oslFileError osl_error = osl_File_E_None;
if (GetTempFileNameW(
o3tl::toW(rtl_uString_getStr(base_directory)),
L"",
0,
temp_file_name) == 0)
{
osl_error = oslTranslateFileError(GetLastError());
}
return osl_error;
}
static bool osl_win32_CreateFile_impl_(
LPCWSTR file_name, bool b_delete_on_close, oslFileHandle* p_handle)
{
DWORD flags = FILE_ATTRIBUTE_NORMAL;
HANDLE hFile;
assert(p_handle);
if (b_delete_on_close)
flags |= FILE_FLAG_DELETE_ON_CLOSE;
hFile = CreateFileW(
file_name,
GENERIC_READ | GENERIC_WRITE,
0,
nullptr,
TRUNCATE_EXISTING,
flags,
nullptr);
// @@@ ERROR HANDLING @@@
if (IsValidHandle(hFile))
*p_handle = osl_createFileHandleFromOSHandle(hFile, osl_File_OpenFlag_Read | osl_File_OpenFlag_Write);
return IsValidHandle(hFile);
}
static oslFileError osl_createTempFile_impl_(
rtl_uString* base_directory,
LPWSTR tmp_name,
bool b_delete_on_close,
oslFileHandle* pHandle,
rtl_uString** ppustrTempFileURL)
{
oslFileError osl_error;
do
{
osl_error = osl_win32_GetTempFileName_impl_(base_directory, tmp_name);
/* if file could not be opened try again */
if ((osl_File_E_None != osl_error) || (nullptr == pHandle) ||
osl_win32_CreateFile_impl_(tmp_name, b_delete_on_close, pHandle))
break;
} while(true); // try until success
if ((osl_error == osl_File_E_None) && !b_delete_on_close)
{
rtl_uString* pustr = nullptr;
rtl_uString_newFromStr(&pustr, o3tl::toU(tmp_name));
osl_getFileURLFromSystemPath(pustr, ppustrTempFileURL);
rtl_uString_release(pustr);
}
return osl_error;
}
oslFileError SAL_CALL osl_createTempFile(
rtl_uString* pustrDirectoryURL,
oslFileHandle* pHandle,
rtl_uString** ppustrTempFileURL)
{
rtl_uString* base_directory = nullptr;
LPWSTR tmp_name;
sal_Bool b_delete_on_close;
oslFileError osl_error;
osl_error = osl_setup_createTempFile_impl_(
pustrDirectoryURL,
pHandle,
ppustrTempFileURL,
&base_directory,
&b_delete_on_close);
if (osl_error != osl_File_E_None)
return osl_error;
/* allocate enough space on the stack, the file name can not be longer than MAX_PATH */
STACK_ALLOC(tmp_name, WCHAR, (rtl_uString_getLength(base_directory) + MAX_PATH));
if (tmp_name)
{
osl_createTempFile_impl_(
base_directory,
tmp_name,
b_delete_on_close,
pHandle,
ppustrTempFileURL);
}
else // stack alloc failed
{
osl_error = osl_File_E_NOMEM;
}
if (base_directory)
rtl_uString_release(base_directory);
return osl_error;
}
oslFileError SAL_CALL osl_getTempDirURL(rtl_uString** pustrTempDir)
{
::osl::LongPathBuffer< sal_Unicode > aBuffer( MAX_LONG_PATH );
LPWSTR lpBuffer = o3tl::toW(aBuffer);
DWORD nBufferLength = aBuffer.getBufSizeInSymbols() - 1;
DWORD nLength;
oslFileError error;
nLength = GetTempPathW( aBuffer.getBufSizeInSymbols(), lpBuffer );
if ( nLength > nBufferLength )
{
// the provided path has invalid length
error = osl_File_E_NOENT;
}
else if ( nLength )
{
rtl_uString *ustrTempPath = nullptr;
if ( '\\' == lpBuffer[nLength-1] )
lpBuffer[nLength-1] = 0;
rtl_uString_newFromStr( &ustrTempPath, o3tl::toU(lpBuffer) );
error = osl_getFileURLFromSystemPath( ustrTempPath, pustrTempDir );
rtl_uString_release( ustrTempPath );
}
else
error = oslTranslateFileError( GetLastError() );
return error;
}
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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