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da082cb8e0
introduced in libmt32emu version 2.3.0 Since it is not really necessary in majority of cases but may nevertheless update global C and C++ locale settings, it must now be explicitly enabled with the new Cmake option libmt32emu_INSTALL_DEFAULT_LOCALE. Also, it no longer touches the global C++ locale even if enabled, since that appears to have no positive effect. So far, it has been found useful for building shared library with some old versions of MS VC when linking C runtime statically. Also, mt32emu-qt now only initialises C locale upon startup.
104 lines
2.6 KiB
C++
104 lines
2.6 KiB
C++
/* Copyright (C) 2003, 2004, 2005, 2006, 2008, 2009 Dean Beeler, Jerome Fisher
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* Copyright (C) 2011-2020 Dean Beeler, Jerome Fisher, Sergey V. Mikayev
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 2.1 of the License, or
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* (at your option) any later version.
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*
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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 Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef MT32EMU_SHARED
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#include <locale>
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#endif
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#include "internals.h"
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#include "FileStream.h"
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namespace MT32Emu {
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// This initialises C locale with the user-preferred system locale once facilitating access
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// to ROM files with localised pathnames. This is only necessary in rare cases e.g. when building
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// shared library statically linked with C runtime with old MS VC versions, so that the C locale
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// set by the client application does not have effect, and thus such ROM files cannot be opened.
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static inline void configureSystemLocale() {
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#if defined MT32EMU_SHARED && defined MT32EMU_INSTALL_DEFAULT_LOCALE
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static bool configured = false;
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if (configured) return;
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configured = true;
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setlocale(LC_ALL, "");
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#endif
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}
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using std::ios_base;
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FileStream::FileStream() : ifsp(*new std::ifstream), data(NULL), size(0)
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{}
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FileStream::~FileStream() {
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// destructor closes ifsp
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delete &ifsp;
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delete[] data;
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}
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size_t FileStream::getSize() {
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if (size != 0) {
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return size;
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}
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if (!ifsp.is_open()) {
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return 0;
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}
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ifsp.seekg(0, ios_base::end);
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size = size_t(ifsp.tellg());
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return size;
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}
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const Bit8u *FileStream::getData() {
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if (data != NULL) {
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return data;
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}
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if (!ifsp.is_open()) {
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return NULL;
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}
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if (getSize() == 0) {
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return NULL;
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}
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Bit8u *fileData = new Bit8u[size];
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if (fileData == NULL) {
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return NULL;
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}
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ifsp.seekg(0);
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ifsp.read(reinterpret_cast<char *>(fileData), std::streamsize(size));
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if (size_t(ifsp.tellg()) != size) {
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delete[] fileData;
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return NULL;
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}
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data = fileData;
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close();
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return data;
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}
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bool FileStream::open(const char *filename) {
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configureSystemLocale();
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ifsp.clear();
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ifsp.open(filename, ios_base::in | ios_base::binary);
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return !ifsp.fail();
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}
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void FileStream::close() {
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ifsp.close();
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ifsp.clear();
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}
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} // namespace MT32Emu
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