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Location: cpp/openttd-patchpack/source/src/ini.cpp - annotation
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* This file is part of OpenTTD.
* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file ini.cpp Definition of the IniItem class, related to reading/writing '*.ini' files. */
#include "stdafx.h"
#include "debug.h"
#include "ini_type.h"
#include "string_func.h"
#include "fileio_func.h"
#include <fstream>
#if (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309L) || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 500)
# include <unistd.h>
# include <fcntl.h>
#endif
#ifdef _WIN32
# include <windows.h>
# include <shellapi.h>
# include "core/mem_func.hpp"
#endif
#include "safeguards.h"
/**
* Create a new ini file with given group names.
* @param list_group_names A \c nullptr terminated list with group names that should be loaded as lists instead of variables. @see IGT_LIST
*/
IniFile::IniFile(const char * const *list_group_names) : IniLoadFile(list_group_names)
{
}
/**
* Save the Ini file's data to the disk.
* @param filename the file to save to.
* @return true if saving succeeded.
*/
bool IniFile::SaveToDisk(const char *filename)
{
/*
* First write the configuration to a (temporary) file and then rename
* that file. This to prevent that when OpenTTD crashes during the save
* you end up with a truncated configuration file.
*/
std::string file_new{ filename };
file_new.append(".new");
std::ofstream os(OTTD2FS(file_new.c_str()));
if (os.fail()) return false;
for (const IniGroup *group = this->group; group != nullptr; group = group->next) {
os << group->comment << "[" << group->name << "]\n";
for (const IniItem *item = group->item; item != nullptr; item = item->next) {
os << item->comment;
/* protect item->name with quotes if needed */
if (item->name.find(' ') != std::string::npos ||
item->name[0] == '[') {
os << "\"" << item->name << "\"";
} else {
os << item->name;
}
os << " = " << item->value.value_or("") << "\n";
}
}
os << this->comment;
os.flush();
os.close();
if (os.fail()) return false;
/*
* POSIX (and friends) do not guarantee that when a file is closed it is
* flushed to the disk. So we manually flush it do disk if we have the
* APIs to do so. We only need to flush the data as the metadata itself
* (modification date etc.) is not important to us; only the real data is.
*/
#if defined(_POSIX_SYNCHRONIZED_IO) && _POSIX_SYNCHRONIZED_IO > 0
int f = open(file_new.c_str(), O_RDWR);
int ret = fdatasync(f);
close(f);
if (ret != 0) return false;
#endif
#if defined(_WIN32)
/* _tcsncpy = strcpy is TCHAR is char, but isn't when TCHAR is wchar. */
#undef strncpy
/* Allocate space for one more \0 character. */
TCHAR tfilename[MAX_PATH + 1], tfile_new[MAX_PATH + 1];
_tcsncpy(tfilename, OTTD2FS(filename), MAX_PATH);
_tcsncpy(tfile_new, OTTD2FS(file_new.c_str()), MAX_PATH);
/* SHFileOperation wants a double '\0' terminated string. */
tfilename[MAX_PATH - 1] = '\0';
tfile_new[MAX_PATH - 1] = '\0';
tfilename[_tcslen(tfilename) + 1] = '\0';
tfile_new[_tcslen(tfile_new) + 1] = '\0';
/* Rename file without any user confirmation. */
SHFILEOPSTRUCT shfopt;
MemSetT(&shfopt, 0);
shfopt.wFunc = FO_MOVE;
shfopt.fFlags = FOF_NOCONFIRMATION | FOF_NOCONFIRMMKDIR | FOF_NOERRORUI | FOF_SILENT;
shfopt.pFrom = tfile_new;
shfopt.pTo = tfilename;
SHFileOperation(&shfopt);
#else
if (rename(file_new.c_str(), filename) < 0) {
DEBUG(misc, 0, "Renaming %s to %s failed; configuration not saved", file_new.c_str(), filename);
}
#endif
return true;
}
/* virtual */ FILE *IniFile::OpenFile(const char *filename, Subdirectory subdir, size_t *size)
{
/* Open the text file in binary mode to prevent end-of-line translations
* done by ftell() and friends, as defined by K&R. */
return FioFOpenFile(filename, "rb", subdir, size);
}
/* virtual */ void IniFile::ReportFileError(const char * const pre, const char * const buffer, const char * const post)
{
ShowInfoF("%s%s%s", pre, buffer, post);
}
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