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Location: cpp/openttd-patchpack/source/src/ini.cpp - annotation
r17167:68f47a8db1b5
10.8 KiB
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(svn r21916) -Fix [FS#4442]: the minimum speed needed for (realistic) acceleration to work properly can sometimes be more than the (temporary) maximum speed causing Clamp to "fail". Make sure that the minimum speed always overrules the maximum speed
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r11352:9d18ed6156c5 r11352:9d18ed6156c5 r11352:9d18ed6156c5 r11352:9d18ed6156c5 r11352:9d18ed6156c5 r11352:9d18ed6156c5 r11352:9d18ed6156c5 r11352:9d18ed6156c5 r11352:9d18ed6156c5 r11331:1af5419c9807 r11352:9d18ed6156c5 r11352:9d18ed6156c5 r9996:3fee1f809309 r9996:3fee1f809309 | /* $Id$ */
/*
* 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 "core/alloc_func.hpp"
#include "core/mem_func.hpp"
#include "debug.h"
#include "ini_type.h"
#include "string_func.h"
#include "fileio_func.h"
#if (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199309L) || (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE >= 500)
# define WITH_FDATASYNC
# include <unistd.h>
#endif
#ifdef WIN32
# include <shellapi.h>
#endif
/**
* Construct a new in-memory item of an Ini file.
* @param parent the group we belong to
* @param name the name of the item
* @param len the length of the name of the item
*/
IniItem::IniItem(IniGroup *parent, const char *name, size_t len) : next(NULL), value(NULL), comment(NULL)
{
if (len == 0) len = strlen(name);
this->name = strndup(name, len);
*parent->last_item = this;
parent->last_item = &this->next;
}
/** Free everything we loaded. */
IniItem::~IniItem()
{
free(this->name);
free(this->value);
free(this->comment);
delete this->next;
}
/**
* Replace the current value with another value.
* @param value the value to replace with.
*/
void IniItem::SetValue(const char *value)
{
free(this->value);
this->value = strdup(value);
}
/**
* Construct a new in-memory group of an Ini file.
* @param parent the file we belong to
* @param name the name of the group
* @param len the length of the name of the group
*/
IniGroup::IniGroup(IniFile *parent, const char *name, size_t len) : next(NULL), type(IGT_VARIABLES), item(NULL), comment(NULL)
{
if (len == 0) len = strlen(name);
this->name = strndup(name, len);
this->last_item = &this->item;
*parent->last_group = this;
parent->last_group = &this->next;
if (parent->list_group_names == NULL) return;
for (uint i = 0; parent->list_group_names[i] != NULL; i++) {
if (strcmp(this->name, parent->list_group_names[i]) == 0) {
this->type = IGT_LIST;
return;
}
}
}
/** Free everything we loaded. */
IniGroup::~IniGroup()
{
free(this->name);
free(this->comment);
delete this->item;
delete this->next;
}
/**
* Get the item with the given name, and if it doesn't exist
* and create is true it creates a new item.
* @param name name of the item to find.
* @param create whether to create an item when not found or not.
* @return the requested item or NULL if not found.
*/
IniItem *IniGroup::GetItem(const char *name, bool create)
{
for (IniItem *item = this->item; item != NULL; item = item->next) {
if (strcmp(item->name, name) == 0) return item;
}
if (!create) return NULL;
/* otherwise make a new one */
return new IniItem(this, name, strlen(name));
}
/**
* Clear all items in the group
*/
void IniGroup::Clear()
{
delete this->item;
this->item = NULL;
this->last_item = &this->item;
}
/**
* Construct a new in-memory Ini file representation.
* @param list_group_names A NULL terminated list with groups that should be
* loaded as lists instead of variables.
*/
IniFile::IniFile(const char * const *list_group_names) : group(NULL), comment(NULL), list_group_names(list_group_names)
{
this->last_group = &this->group;
}
/** Free everything we loaded. */
IniFile::~IniFile()
{
free(this->comment);
delete this->group;
}
/**
* Get the group with the given name, and if it doesn't exist
* create a new group.
* @param name name of the group to find.
* @param len the maximum length of said name.
* @return the requested group.
*/
IniGroup *IniFile::GetGroup(const char *name, size_t len)
{
if (len == 0) len = strlen(name);
/* does it exist already? */
for (IniGroup *group = this->group; group != NULL; group = group->next) {
if (!strncmp(group->name, name, len) && group->name[len] == 0) {
return group;
}
}
/* otherwise make a new one */
IniGroup *group = new IniGroup(this, name, len);
group->comment = strdup("\n");
return group;
}
/**
* Remove the group with the given name.
* @param name name of the group to remove.
*/
void IniFile::RemoveGroup(const char *name)
{
size_t len = strlen(name);
IniGroup *prev = NULL;
IniGroup *group;
/* does it exist already? */
for (group = this->group; group != NULL; prev = group, group = group->next) {
if (strncmp(group->name, name, len) == 0) {
break;
}
}
if (group == NULL) return;
if (prev != NULL) {
prev->next = prev->next->next;
if (this->last_group == &group->next) this->last_group = &prev->next;
} else {
this->group = this->group->next;
if (this->last_group == &group->next) this->last_group = &this->group;
}
group->next = NULL;
delete group;
}
/**
* Load the Ini file's data from the disk.
* @param filename the file to load.
* @pre nothing has been loaded yet.
*/
void IniFile::LoadFromDisk(const char *filename)
{
assert(this->last_group == &this->group);
char buffer[1024];
IniGroup *group = NULL;
char *comment = NULL;
uint comment_size = 0;
uint comment_alloc = 0;
size_t end;
/*
* Now we are going to open a file that contains no more than simple
* plain text. That would raise the question: "why open the file as
* if it is a binary file?". That's simple... Microsoft, in all
* their greatness and wisdom decided it would be useful if ftell
* is aware of '\r\n' and "sees" that as a single character. The
* easiest way to test for that situation is by searching for '\n'
* and decrease the value every time you encounter a '\n'. This will
* thus also make ftell "see" the '\r' when it is not there, so the
* result of ftell will be highly unreliable. So to work around this
* marvel of wisdom we have to open in as a binary file.
*/
FILE *in = FioFOpenFile(filename, "rb", DATA_DIR, &end);
if (in == NULL) return;
end += ftell(in);
/* for each line in the file */
while ((size_t)ftell(in) < end && fgets(buffer, sizeof(buffer), in)) {
char c, *s;
/* trim whitespace from the left side */
for (s = buffer; *s == ' ' || *s == '\t'; s++) {}
/* trim whitespace from right side. */
char *e = s + strlen(s);
while (e > s && ((c = e[-1]) == '\n' || c == '\r' || c == ' ' || c == '\t')) e--;
*e = '\0';
/* skip comments and empty lines */
if (*s == '#' || *s == ';' || *s == '\0') {
uint ns = comment_size + (e - s + 1);
uint a = comment_alloc;
/* add to comment */
if (ns > a) {
a = max(a, 128U);
do a *= 2; while (a < ns);
comment = ReallocT(comment, comment_alloc = a);
}
uint pos = comment_size;
comment_size += (e - s + 1);
comment[pos + e - s] = '\n'; // comment newline
memcpy(comment + pos, s, e - s); // copy comment contents
continue;
}
/* it's a group? */
if (s[0] == '[') {
if (e[-1] != ']') {
ShowInfoF("ini: invalid group name '%s'", buffer);
} else {
e--;
}
s++; // skip [
group = new IniGroup(this, s, e - s);
if (comment_size) {
group->comment = strndup(comment, comment_size);
comment_size = 0;
}
} else if (group) {
char *t;
/* find end of keyname */
if (*s == '\"') {
s++;
for (t = s; *t != '\0' && *t != '\"'; t++) {}
if (*t == '\"') *t = ' ';
} else {
for (t = s; *t != '\0' && *t != '=' && *t != '\t' && *t != ' '; t++) {}
}
/* it's an item in an existing group */
IniItem *item = new IniItem(group, s, t - s);
if (comment_size) {
item->comment = strndup(comment, comment_size);
comment_size = 0;
}
/* find start of parameter */
while (*t == '=' || *t == ' ' || *t == '\t') t++;
bool quoted = (*t == '\"');
/* remove starting quotation marks */
if (*t == '\"') t++;
/* remove ending quotation marks */
e = t + strlen(t);
if (e > t && e[-1] == '\"') e--;
*e = '\0';
/* If the value was not quoted and empty, it must be NULL */
item->value = (!quoted && e == t) ? NULL : strndup(t, e - t);
} else {
/* it's an orphan item */
ShowInfoF("ini: '%s' outside of group", buffer);
}
}
if (comment_size > 0) {
this->comment = strndup(comment, comment_size);
comment_size = 0;
}
free(comment);
fclose(in);
}
/**
* 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.
*/
char file_new[MAX_PATH];
strecpy(file_new, filename, lastof(file_new));
strecat(file_new, ".new", lastof(file_new));
FILE *f = fopen(file_new, "w");
if (f == NULL) return false;
for (const IniGroup *group = this->group; group != NULL; group = group->next) {
if (group->comment) fputs(group->comment, f);
fprintf(f, "[%s]\n", group->name);
for (const IniItem *item = group->item; item != NULL; item = item->next) {
if (item->comment != NULL) fputs(item->comment, f);
/* protect item->name with quotes if needed */
if (strchr(item->name, ' ') != NULL ||
item->name[0] == '[') {
fprintf(f, "\"%s\"", item->name);
} else {
fprintf(f, "%s", item->name);
}
fprintf(f, " = %s\n", item->value == NULL ? "" : item->value);
}
}
if (this->comment) fputs(this->comment, f);
/*
* 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.
*/
#ifdef WITH_FDATASYNC
int ret = fdatasync(fileno(f));
fclose(f);
if (ret != 0) return false;
#else
fclose(f);
#endif
#if defined(WIN32) || defined(WIN64)
/* 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), 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
rename(file_new, filename);
#endif
return true;
}
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