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Location: cpp/openttd-patchpack/source/src/fileio.cpp - annotation
r7128:5dd9e863c104
13.8 KiB
text/x-c
(svn r10402) -Update: WebTranslator2 update to 2007-06-30 21:32:39
bulgarian - 10 fixed by kokobongo (10)
french - 2 fixed by glx (2)
italian - 2 fixed, 2 changed by lorenzodv (4)
korean - 2 fixed, 2 changed by darkttd (4)
polish - 43 fixed, 1 changed by meush (44)
slovenian - 1 fixed by Necrolyte (1)
spanish - 5 changed by eusebio (5)
swedish - 2 fixed by giddorah (2)
bulgarian - 10 fixed by kokobongo (10)
french - 2 fixed by glx (2)
italian - 2 fixed, 2 changed by lorenzodv (4)
korean - 2 fixed, 2 changed by darkttd (4)
polish - 43 fixed, 1 changed by meush (44)
slovenian - 1 fixed by Necrolyte (1)
spanish - 5 changed by eusebio (5)
swedish - 2 fixed by giddorah (2)
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/** @file fileio.cpp Standard In/Out file operations */
#include "stdafx.h"
#include "openttd.h"
#include "fileio.h"
#include "functions.h"
#include "string.h"
#include "macros.h"
#include "variables.h"
#include "debug.h"
#include "fios.h"
#ifdef WIN32
#include <windows.h>
#else
#include <pwd.h>
#include <unistd.h>
#include <sys/stat.h>
#endif
/*************************************************/
/* FILE IO ROUTINES ******************************/
/*************************************************/
#define FIO_BUFFER_SIZE 512
#define MAX_HANDLES 64
struct Fio {
byte *buffer, *buffer_end; ///< position pointer in local buffer and last valid byte of buffer
uint32 pos; ///< current (system) position in file
FILE *cur_fh; ///< current file handle
const char *filename; ///< current filename
FILE *handles[MAX_HANDLES]; ///< array of file handles we can have open
byte buffer_start[FIO_BUFFER_SIZE]; ///< local buffer when read from file
const char *filenames[MAX_HANDLES]; ///< array of filenames we (should) have open
#if defined(LIMITED_FDS)
uint open_handles; ///< current amount of open handles
uint usage_count[MAX_HANDLES]; ///< count how many times this file has been opened
#endif /* LIMITED_FDS */
};
static Fio _fio;
/* Get current position in file */
uint32 FioGetPos()
{
return _fio.pos + (_fio.buffer - _fio.buffer_start) - FIO_BUFFER_SIZE;
}
const char *FioGetFilename()
{
return _fio.filename;
}
void FioSeekTo(uint32 pos, int mode)
{
if (mode == SEEK_CUR) pos += FioGetPos();
_fio.buffer = _fio.buffer_end = _fio.buffer_start + FIO_BUFFER_SIZE;
_fio.pos = pos;
fseek(_fio.cur_fh, _fio.pos, SEEK_SET);
}
#if defined(LIMITED_FDS)
static void FioRestoreFile(int slot)
{
/* Do we still have the file open, or should we reopen it? */
if (_fio.handles[slot] == NULL) {
DEBUG(misc, 6, "Restoring file '%s' in slot '%d' from disk", _fio.filename[slot], slot);
FioOpenFile(slot, _fio.filename[slot]);
}
_fio.usage_count[slot]++;
}
#endif /* LIMITED_FDS */
/* Seek to a file and a position */
void FioSeekToFile(uint32 pos)
{
FILE *f;
#if defined(LIMITED_FDS)
/* Make sure we have this file open */
FioRestoreFile(pos >> 24);
#endif /* LIMITED_FDS */
f = _fio.handles[pos >> 24];
assert(f != NULL);
_fio.cur_fh = f;
_fio.filename = _fio.filenames[pos >> 24];
FioSeekTo(GB(pos, 0, 24), SEEK_SET);
}
byte FioReadByte()
{
if (_fio.buffer == _fio.buffer_end) {
_fio.pos += FIO_BUFFER_SIZE;
fread(_fio.buffer = _fio.buffer_start, 1, FIO_BUFFER_SIZE, _fio.cur_fh);
}
return *_fio.buffer++;
}
void FioSkipBytes(int n)
{
for (;;) {
int m = min(_fio.buffer_end - _fio.buffer, n);
_fio.buffer += m;
n -= m;
if (n == 0) break;
FioReadByte();
n--;
}
}
uint16 FioReadWord()
{
byte b = FioReadByte();
return (FioReadByte() << 8) | b;
}
uint32 FioReadDword()
{
uint b = FioReadWord();
return (FioReadWord() << 16) | b;
}
void FioReadBlock(void *ptr, uint size)
{
FioSeekTo(FioGetPos(), SEEK_SET);
_fio.pos += size;
fread(ptr, 1, size, _fio.cur_fh);
}
static inline void FioCloseFile(int slot)
{
if (_fio.handles[slot] != NULL) {
fclose(_fio.handles[slot]);
_fio.handles[slot] = NULL;
#if defined(LIMITED_FDS)
_fio.open_handles--;
#endif /* LIMITED_FDS */
}
}
void FioCloseAll()
{
int i;
for (i = 0; i != lengthof(_fio.handles); i++)
FioCloseFile(i);
}
#if defined(LIMITED_FDS)
static void FioFreeHandle()
{
/* If we are about to open a file that will exceed the limit, close a file */
if (_fio.open_handles + 1 == LIMITED_FDS) {
uint i, count;
int slot;
count = UINT_MAX;
slot = -1;
/* Find the file that is used the least */
for (i = 0; i < lengthof(_fio.handles); i++) {
if (_fio.handles[i] != NULL && _fio.usage_count[i] < count) {
count = _fio.usage_count[i];
slot = i;
}
}
assert(slot != -1);
DEBUG(misc, 6, "Closing filehandler '%s' in slot '%d' because of fd-limit", _fio.filename[slot], slot);
FioCloseFile(slot);
}
}
#endif /* LIMITED_FDS */
void FioOpenFile(int slot, const char *filename)
{
FILE *f;
#if defined(LIMITED_FDS)
FioFreeHandle();
#endif /* LIMITED_FDS */
f = FioFOpenFile(filename);
if (f == NULL) error("Cannot open file '%s'", filename);
FioCloseFile(slot); // if file was opened before, close it
_fio.handles[slot] = f;
_fio.filenames[slot] = filename;
#if defined(LIMITED_FDS)
_fio.usage_count[slot] = 0;
_fio.open_handles++;
#endif /* LIMITED_FDS */
FioSeekToFile(slot << 24);
}
const char *_subdirs[NUM_SUBDIRS] = {
"",
"save" PATHSEP,
"save" PATHSEP "autosave" PATHSEP,
"scenario" PATHSEP,
"scenario" PATHSEP "heightmap" PATHSEP,
"gm" PATHSEP,
"data" PATHSEP,
"lang" PATHSEP
};
const char *_searchpaths[NUM_SEARCHPATHS];
/**
* Check whether the given file exists
* @param filename the file to try for existance
* @param subdir the subdirectory to look in
* @return true if and only if the file can be opened
*/
bool FioCheckFileExists(const char *filename, Subdirectory subdir)
{
FILE *f = FioFOpenFile(filename, "rb", subdir);
if (f == NULL) return false;
fclose(f);
return true;
}
char *FioGetFullPath(char *buf, size_t buflen, Searchpath sp, Subdirectory subdir, const char *filename)
{
assert(subdir < NUM_SUBDIRS);
assert(sp < NUM_SEARCHPATHS);
snprintf(buf, buflen, "%s%s%s", _searchpaths[sp], _subdirs[subdir], filename);
return buf;
}
char *FioFindFullPath(char *buf, size_t buflen, Subdirectory subdir, const char *filename)
{
Searchpath sp;
assert(subdir < NUM_SUBDIRS);
FOR_ALL_SEARCHPATHS(sp) {
FioGetFullPath(buf, buflen, sp, subdir, filename);
if (FileExists(buf)) break;
}
return buf;
}
char *FioAppendDirectory(char *buf, size_t buflen, Searchpath sp, Subdirectory subdir)
{
assert(subdir < NUM_SUBDIRS);
assert(sp < NUM_SEARCHPATHS);
snprintf(buf, buflen, "%s%s", _searchpaths[sp], _subdirs[subdir]);
return buf;
}
char *FioGetDirectory(char *buf, size_t buflen, Subdirectory subdir)
{
Searchpath sp;
/* Find and return the first valid directory */
FOR_ALL_SEARCHPATHS(sp) {
char *ret = FioAppendDirectory(buf, buflen, sp, subdir);
if (FileExists(buf)) return ret;
}
/* Could not find the directory, fall back to a base path */
ttd_strlcpy(buf, _personal_dir, buflen);
return buf;
}
FILE *FioFOpenFileSp(const char *filename, const char *mode, Searchpath sp, Subdirectory subdir)
{
#if defined(WIN32) && defined(UNICODE)
/* fopen is implemented as a define with ellipses for
* Unicode support (prepend an L). As we are not sending
* a string, but a variable, it 'renames' the variable,
* so make that variable to makes it compile happily */
wchar_t Lmode[5];
MultiByteToWideChar(CP_ACP, 0, mode, -1, Lmode, lengthof(Lmode));
#endif
FILE *f = NULL;
char buf[MAX_PATH];
if (subdir == NO_DIRECTORY) {
ttd_strlcpy(buf, filename, lengthof(buf));
} else {
snprintf(buf, lengthof(buf), "%s%s%s", _searchpaths[sp], _subdirs[subdir], filename);
}
f = fopen(buf, mode);
#if !defined(WIN32)
if (f == NULL) {
strtolower(buf + strlen(_searchpaths[sp]) - 1);
f = fopen(buf, mode);
}
#endif
return f;
}
/** Opens OpenTTD files somewhere in a personal or global directory */
FILE *FioFOpenFile(const char *filename, const char *mode, Subdirectory subdir)
{
FILE *f = NULL;
Searchpath sp;
assert(subdir < NUM_SUBDIRS || subdir == NO_DIRECTORY);
FOR_ALL_SEARCHPATHS(sp) {
f = FioFOpenFileSp(filename, mode, sp, subdir);
if (f != NULL || subdir == NO_DIRECTORY) break;
}
return f;
}
/**
* Create a directory with the given name
* @param name the new name of the directory
*/
void FioCreateDirectory(const char *name)
{
#if defined(WIN32) || defined(WINCE)
CreateDirectory(OTTD2FS(name), NULL);
#elif defined(OS2) && !defined(__INNOTEK_LIBC__)
mkdir(OTTD2FS(name));
#else
mkdir(OTTD2FS(name), 0755);
#endif
}
/**
* Appends, if necessary, the path separator character to the end of the string.
* It does not add the path separator to zero-sized strings.
* @param buf string to append the separator to
* @param buflen the length of the buf
*/
void AppendPathSeparator(char *buf, size_t buflen)
{
size_t s = strlen(buf);
/* Length of string + path separator + '\0' */
if (s != 0 && buf[s - 1] != PATHSEPCHAR && s + 2 < buflen) {
buf[s] = PATHSEPCHAR;
buf[s + 1] = '\0';
}
}
/**
* Allocates and files a variable with the full path
* based on the given directory.
* @param dir the directory to base the path on
* @return the malloced full path
*/
char *BuildWithFullPath(const char *dir)
{
char *dest = MallocT<char>(MAX_PATH);
ttd_strlcpy(dest, dir, MAX_PATH);
/* Check if absolute or relative path */
const char *s = strchr(dest, PATHSEPCHAR);
/* Add absolute path */
if (s == NULL || dest != s) {
getcwd(dest, MAX_PATH);
AppendPathSeparator(dest, MAX_PATH);
ttd_strlcat(dest, dir, MAX_PATH);
}
AppendPathSeparator(dest, MAX_PATH);
return dest;
}
#if defined(WIN32) || defined(WINCE)
/**
* Determine the base (personal dir and game data dir) paths
* @param exe the path from the current path to the executable
* @note defined in the OS related files (os2.cpp, win32.cpp, unix.cpp etc)
*/
extern void DetermineBasePaths(const char *exe);
#else /* defined(WIN32) || defined(WINCE) */
/**
* Changes the working directory to the path of the give executable.
* For OSX application bundles '.app' is the required extension of the bundle,
* so when we crop the path to there, when can remove the name of the bundle
* in the same way we remove the name from the executable name.
* @param exe the path to the executable
*/
void ChangeWorkingDirectory(const char *exe)
{
#ifdef WITH_COCOA
char *app_bundle = strchr(exe, '.');
while (app_bundle != NULL && strncasecmp(app_bundle, ".app", 4) != 0) app_bundle = strchr(&app_bundle[1], '.');
if (app_bundle != NULL) app_bundle[0] = '\0';
#endif /* WITH_COCOA */
char *s = strrchr(exe, PATHSEPCHAR);
if (s != NULL) {
*s = '\0';
chdir(exe);
*s = PATHSEPCHAR;
}
#ifdef WITH_COCOA
if (app_bundle != NULL) app_bundle[0] = '.';
#endif /* WITH_COCOA */
}
/**
* Determine the base (personal dir and game data dir) paths
* @param exe the path to the executable
*/
void DetermineBasePaths(const char *exe)
{
char tmp[MAX_PATH];
#if defined(__MORPHOS__) || defined(__AMIGA__) || !defined(WITH_PERSONAL_DIR)
_searchpaths[SP_PERSONAL_DIR] = NULL;
#else
const char *homedir = getenv("HOME");
if (homedir == NULL) {
const struct passwd *pw = getpwuid(getuid());
homedir = (pw == NULL) ? "" : pw->pw_dir;
}
snprintf(tmp, MAX_PATH, "%s" PATHSEP "%s", homedir, PERSONAL_DIR);
AppendPathSeparator(tmp, MAX_PATH);
_searchpaths[SP_PERSONAL_DIR] = strdup(tmp);
#endif
_searchpaths[SP_SHARED_DIR] = NULL;
#if defined(__MORPHOS__) || defined(__AMIGA__)
_searchpaths[SP_WORKING_DIR] = NULL;
#else
getcwd(tmp, MAX_PATH);
AppendPathSeparator(tmp, MAX_PATH);
_searchpaths[SP_WORKING_DIR] = strdup(tmp);
#endif
/* Change the working directory to that one of the executable */
ChangeWorkingDirectory((char*)exe);
getcwd(tmp, MAX_PATH);
AppendPathSeparator(tmp, MAX_PATH);
_searchpaths[SP_BINARY_DIR] = strdup(tmp);
#if defined(__MORPHOS__) || defined(__AMIGA__)
_searchpaths[SP_INSTALLATION_DIR] = NULL;
#else
snprintf(tmp, MAX_PATH, "%s", GLOBAL_DATA_DIR);
AppendPathSeparator(tmp, MAX_PATH);
_searchpaths[SP_INSTALLATION_DIR] = strdup(tmp);
#endif
#ifdef WITH_COCOA
extern void cocoaSetApplicationBundleDir();
cocoaSetApplicationBundleDir();
#else
_searchpaths[SP_APPLICATION_BUNDLE_DIR] = NULL;
#endif
}
#endif /* defined(WIN32) || defined(WINCE) */
char *_personal_dir;
/**
* Acquire the base paths (personal dir and game data dir),
* fill all other paths (save dir, autosave dir etc) and
* make the save and scenario directories.
* @param exe the path from the current path to the executable
*/
void DeterminePaths(const char *exe)
{
DetermineBasePaths(exe);
Searchpath sp;
FOR_ALL_SEARCHPATHS(sp) DEBUG(misc, 4, "%s added as search path", _searchpaths[sp]);
if (_config_file != NULL) {
_personal_dir = strdup(_config_file);
char *end = strrchr(_personal_dir , PATHSEPCHAR);
if (end == NULL) {
_personal_dir[0] = '\0';
} else {
end[1] = '\0';
}
} else {
char personal_dir[MAX_PATH];
FioFindFullPath(personal_dir, lengthof(personal_dir), BASE_DIR, "openttd.cfg");
if (FileExists(personal_dir)) {
char *end = strrchr(personal_dir, PATHSEPCHAR);
if (end != NULL) end[1] = '\0';
_personal_dir = strdup(personal_dir);
_config_file = str_fmt("%sopenttd.cfg", _personal_dir);
} else {
static const Searchpath new_openttd_cfg_order[] = {
SP_PERSONAL_DIR, SP_BINARY_DIR, SP_WORKING_DIR, SP_SHARED_DIR, SP_INSTALLATION_DIR
};
for (uint i = 0; i < lengthof(new_openttd_cfg_order); i++) {
if (IsValidSearchPath(new_openttd_cfg_order[i])) {
_personal_dir = strdup(_searchpaths[new_openttd_cfg_order[i]]);
_config_file = str_fmt("%sopenttd.cfg", _personal_dir);
break;
}
}
}
}
DEBUG(misc, 3, "%s found as personal directory", _personal_dir);
_highscore_file = str_fmt("%shs.dat", _personal_dir);
_log_file = str_fmt("%sopenttd.log", _personal_dir);
char *save_dir = str_fmt("%s%s", _personal_dir, FioGetSubdirectory(SAVE_DIR));
char *autosave_dir = str_fmt("%s%s", _personal_dir, FioGetSubdirectory(AUTOSAVE_DIR));
/* Make the necessary folders */
FioCreateDirectory(_personal_dir);
FioCreateDirectory(save_dir);
FioCreateDirectory(autosave_dir);
free(save_dir);
free(autosave_dir);
}
/**
* Sanitizes a filename, i.e. removes all illegal characters from it.
* @param filename the "\0" terminated filename
*/
void SanitizeFilename(char *filename)
{
for (; *filename != '\0'; filename++) {
switch (*filename) {
/* The following characters are not allowed in filenames
* on at least one of the supported operating systems: */
case ':': case '\\': case '*': case '?': case '/':
case '<': case '>': case '|': case '"':
*filename = '_';
break;
}
}
}
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