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@ r7883:349f8eeb6fdf
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Location: cpp/openttd-patchpack/source/src/fileio.cpp
r7883:349f8eeb6fdf
19.2 KiB
text/x-c
(svn r11434) -Fix: fixed a string in finnish (suggested by ln-)
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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>
#endif
#include <sys/stat.h>
/*************************************************/
/* FILE IO ROUTINES ******************************/
/*************************************************/
#define FIO_BUFFER_SIZE 512
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_FILE_SLOTS]; ///< array of file handles we can have open
byte buffer_start[FIO_BUFFER_SIZE]; ///< local buffer when read from file
const char *filenames[MAX_FILE_SLOTS]; ///< array of filenames we (should) have open
#if defined(LIMITED_FDS)
uint open_handles; ///< current amount of open handles
uint usage_count[MAX_FILE_SLOTS]; ///< 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.filenames[slot], slot);
FioOpenFile(slot, _fio.filenames[slot]);
}
_fio.usage_count[slot]++;
}
#endif /* LIMITED_FDS */
/* Seek to a file and a position */
void FioSeekToFile(uint8 slot, uint32 pos)
{
FILE *f;
#if defined(LIMITED_FDS)
/* Make sure we have this file open */
FioRestoreFile(slot);
#endif /* LIMITED_FDS */
f = _fio.handles[slot];
assert(f != NULL);
_fio.cur_fh = f;
_fio.filename = _fio.filenames[slot];
FioSeekTo(pos, 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.filenames[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);
uint32 pos = ftell(f);
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, pos);
}
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];
TarList _tar_list;
TarFileList _tar_filelist;
/**
* 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;
FioFCloseFile(f);
return true;
}
/**
* Close a file in a safe way.
*/
void FioFCloseFile(FILE *f)
{
fclose(f);
}
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, size_t *filesize)
{
#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);
}
#if defined(WIN32)
if (mode[0] == 'r' && GetFileAttributes(OTTD2FS(buf)) == INVALID_FILE_ATTRIBUTES) return NULL;
#endif
f = fopen(buf, mode);
#if !defined(WIN32)
if (f == NULL) {
strtolower(buf + strlen(_searchpaths[sp]) - 1);
f = fopen(buf, mode);
}
#endif
if (f != NULL && filesize != NULL) {
/* Find the size of the file */
fseek(f, 0, SEEK_END);
*filesize = ftell(f);
fseek(f, 0, SEEK_SET);
}
return f;
}
FILE *FioFOpenFileTar(TarFileListEntry *entry, size_t *filesize)
{
FILE *f = fopen(entry->tar->filename, "rb");
assert(f != NULL);
fseek(f, entry->position, SEEK_SET);
if (filesize != NULL) *filesize = entry->size;
return f;
}
/** Opens OpenTTD files somewhere in a personal or global directory */
FILE *FioFOpenFile(const char *filename, const char *mode, Subdirectory subdir, size_t *filesize)
{
FILE *f = NULL;
Searchpath sp;
assert(subdir < NUM_SUBDIRS || subdir == NO_DIRECTORY);
FOR_ALL_SEARCHPATHS(sp) {
f = FioFOpenFileSp(filename, mode, sp, subdir, filesize);
if (f != NULL || subdir == NO_DIRECTORY) break;
}
/* We can only use .tar in case of data-dir, and read-mode */
if (f == NULL && subdir == DATA_DIR && mode[0] == 'r') {
/* Filenames in tars are always forced to be lowercase */
char *lcfilename = strdup(filename);
strtolower(lcfilename);
TarFileList::iterator it = _tar_filelist.find(lcfilename);
free(lcfilename);
if (it != _tar_filelist.end()) {
f = FioFOpenFileTar(&((*it).second), filesize);
}
}
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;
}
static bool TarListAddFile(const char *filename)
{
/* The TAR-header, repeated for every file */
typedef struct TarHeader {
char name[100]; ///< Name of the file
char mode[8];
char uid[8];
char gid[8];
char size[12]; ///< Size of the file, in ASCII
char mtime[12];
char chksum[8];
char typeflag;
char linkname[100];
char magic[6];
char version[2];
char uname[32];
char gname[32];
char devmajor[8];
char devminor[8];
char prefix[155]; ///< Path of the file
char unused[12];
} TarHeader;
/* Check if we already seen this file */
TarList::iterator it = _tar_list.find(filename);
if (it != _tar_list.end()) return false;
FILE *f = fopen(filename, "rb");
assert(f != NULL);
TarListEntry *tar_entry = MallocT<TarListEntry>(1);
tar_entry->filename = strdup(filename);
_tar_list.insert(TarList::value_type(filename, tar_entry));
TarHeader th;
char buf[sizeof(th.name) + 1], *end;
char name[sizeof(th.prefix) + 1 + sizeof(th.name) + 1];
int num = 0, pos = 0;
/* Make a char of 512 empty bytes */
char empty[512];
memset(&empty[0], 0, sizeof(empty));
while (!feof(f)) {
fread(&th, 1, 512, f);
pos += 512;
/* Check if we have the new tar-format (ustar) or the old one (a lot of zeros after 'link' field) */
if (strncmp(th.magic, "ustar", 5) != 0 && memcmp(&th.magic, &empty[0], 512 - offsetof(TarHeader, magic)) != 0) {
/* If we have only zeros in the block, it can be an end-of-file indicator */
if (memcmp(&th, &empty[0], 512) == 0) continue;
DEBUG(misc, 0, "The file '%s' isn't a valid tar-file", filename);
return false;
}
name[0] = '\0';
int len = 0;
/* The prefix contains the directory-name */
if (th.prefix[0] != '\0') {
memcpy(name, th.prefix, sizeof(th.prefix));
name[sizeof(th.prefix)] = '\0';
len = strlen(name);
name[len] = PATHSEPCHAR;
len++;
}
/* Copy the name of the file in a safe way at the end of 'name' */
memcpy(&name[len], th.name, sizeof(th.name));
name[len + sizeof(th.name)] = '\0';
/* Calculate the size of the file.. for some strange reason this is stored as a string */
memcpy(buf, th.size, sizeof(th.size));
buf[sizeof(th.size)] = '\0';
int skip = strtol(buf, &end, 8);
/* 0 byte sized files can be skipped (dirs, symlinks, ..) */
if (skip == 0) continue;
/* Store this entry in the list */
TarFileListEntry entry;
entry.tar = tar_entry;
entry.size = skip;
entry.position = pos;
/* Force lowercase */
strtolower(name);
/* Tar-files always have '/' path-seperator, but we want our PATHSEPCHAR */
#if (PATHSEPCHAR != '/')
for (char *n = name; *n != '\0'; n++) if (*n == '/') *n = PATHSEPCHAR;
#endif
DEBUG(misc, 6, "Found file in tar: %s (%d bytes, %d offset)", name, skip, pos);
if (_tar_filelist.insert(TarFileList::value_type(name, entry)).second) num++;
/* Skip to the next block.. */
skip = ALIGN(skip, 512);
fseek(f, skip, SEEK_CUR);
pos += skip;
}
DEBUG(misc, 1, "Found tar '%s' with %d new files", filename, num);
fclose(f);
return true;
}
static int ScanPathForTarFiles(const char *path, int basepath_length)
{
extern bool FiosIsValidFile(const char *path, const struct dirent *ent, struct stat *sb);
uint num = 0;
struct stat sb;
struct dirent *dirent;
DIR *dir;
if (path == NULL || (dir = ttd_opendir(path)) == NULL) return 0;
while ((dirent = readdir(dir)) != NULL) {
const char *d_name = FS2OTTD(dirent->d_name);
char filename[MAX_PATH];
if (!FiosIsValidFile(path, dirent, &sb)) continue;
snprintf(filename, lengthof(filename), "%s%s", path, d_name);
if (sb.st_mode & S_IFDIR) {
/* Directory */
if (strcmp(d_name, ".") == 0 || strcmp(d_name, "..") == 0) continue;
AppendPathSeparator(filename, lengthof(filename));
num += ScanPathForTarFiles(filename, basepath_length);
} else if (sb.st_mode & S_IFREG) {
/* File */
char *ext = strrchr(filename, '.');
/* If no extension or extension isn't .tar, skip the file */
if (ext == NULL) continue;
if (strcasecmp(ext, ".tar") != 0) continue;
if (TarListAddFile(filename)) num++;
}
}
closedir(dir);
return num;
}
void ScanForTarFiles()
{
Searchpath sp;
char path[MAX_PATH];
uint num = 0;
DEBUG(misc, 1, "Scanning for tars");
FOR_ALL_SEARCHPATHS(sp) {
FioAppendDirectory(path, MAX_PATH, sp, DATA_DIR);
num += ScanPathForTarFiles(path, strlen(path));
}
DEBUG(misc, 1, "Scan complete, found %d files", num);
}
#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
ScanForTarFiles();
}
#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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