525 lines
12 KiB
C++
525 lines
12 KiB
C++
// Copyright (C) 2003-2008 Dolphin Project.
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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 General Public License as published by
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// the Free Software Foundation, version 2.0.
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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 General Public License 2.0 for more details.
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// A copy of the GPL 2.0 should have been included with the program.
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// If not, see http://www.gnu.org/licenses/
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// Official SVN repository and contact information can be found at
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// http://code.google.com/p/dolphin-emu/
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#include "Common.h"
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#include "FileUtil.h"
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#ifdef _WIN32
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#include <windows.h>
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#include <shlobj.h> // for SHGetFolderPath
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#include <shellapi.h>
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#include <commdlg.h> // for GetSaveFileName
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#include <io.h>
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#include <direct.h> // getcwd
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#else
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#include <sys/types.h>
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#include <dirent.h>
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#include <errno.h>
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#include <stdlib.h>
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#endif
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#include <fstream>
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#include <sys/stat.h>
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#ifndef S_ISDIR
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#define S_ISDIR(m) (((m)&S_IFMT) == S_IFDIR)
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#endif
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/*
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This namespace has various generic functions related to files and paths.
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The code still needs a ton of cleanup.
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REMEMBER: strdup considered harmful!
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*/
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namespace File
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{
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// Remove any ending forward slashes from directory paths
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// Modifies argument.
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inline char *StripTailDirSlashes(char *fname)
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{
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int len = (int)strlen(fname);
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int i = len - 1;
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if (len > 1)
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while (fname[i] == DIR_SEP_CHR)
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fname[i--] = '\0';
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return fname;
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}
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// Returns true if file filename exists
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bool Exists(const char *filename)
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{
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struct stat file_info;
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char *copy = StripTailDirSlashes(strdup(filename));
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int result = stat(copy, &file_info);
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if (result < 0)
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{
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WARN_LOG(COMMON, "Exist: stat failed on %s: %s", filename,
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GetLastErrorMsg());
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}
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free(copy);
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return (result == 0);
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}
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// Returns true if filename is a directory
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bool IsDirectory(const char *filename)
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{
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struct stat file_info;
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char *copy = StripTailDirSlashes(strdup(filename));
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int result = stat(copy, &file_info);
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free(copy);
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if (result < 0) {
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WARN_LOG(COMMON, "IsDirectory: stat failed on %s: %s",
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filename, GetLastErrorMsg());
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return false;
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}
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return S_ISDIR(file_info.st_mode);
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}
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// Deletes a given filename, return true on success
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// Doesn't supports deleting a directory
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bool Delete(const char *filename)
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{
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INFO_LOG(COMMON, "Delete: file %s\n", filename);
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// Return true because we care about the file no
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// being there, not the actual delete.
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if (!Exists(filename)) {
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WARN_LOG(COMMON, "Delete: %s does not exists", filename);
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return true;
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}
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// We can't delete a directory
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if (IsDirectory(filename)) {
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WARN_LOG(COMMON, "Delete: %s is a directory", filename);
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return false;
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}
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#ifdef _WIN32
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if (!DeleteFile(filename)) {
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WARN_LOG(COMMON, "Delete: DeleteFile failed on %s: %s",
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filename, GetLastErrorMsg());
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return false;
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}
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#else
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if (unlink(filename) == -1) {
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WARN_LOG(COMMON, "Delete: DeleteFile failed on %s: %s",
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filename, GetLastErrorMsg());
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return false;
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}
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#endif
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return true;
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}
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// Returns true if successful, or path already exists.
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bool CreateDir(const char *path)
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{
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INFO_LOG(COMMON, "CreateDir: directory %s\n", path);
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#ifdef _WIN32
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if (::CreateDirectory(path, NULL))
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return true;
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DWORD error = GetLastError();
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if (error == ERROR_ALREADY_EXISTS) {
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WARN_LOG(COMMON, "CreateDir: CreateDirectory failed on %s: already exists", path);
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return true;
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}
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ERROR_LOG(COMMON, "CreateDir: CreateDirectory failed on %s: %i", path, error);
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return false;
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#else
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if (mkdir(path, 0755) == 0)
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return true;
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int err = errno;
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if (err == EEXIST) {
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WARN_LOG(COMMON, "CreateDir: mkdir failed on %s: already exists", path);
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return true;
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}
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ERROR_LOG(COMMON, "CreateDir: mkdir failed on %s: %s", path, strerror(err));
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return false;
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#endif
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}
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// Creates the full path of fullPath returns true on success
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bool CreateFullPath(const char *fullPath)
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{
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int panicCounter = 100;
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INFO_LOG(COMMON, "CreateFullPath: path %s\n", fullPath);
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const char *position = fullPath;
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while (true) {
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// Find next sub path, support both \ and / directory separators
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position = strchr(position, DIR_SEP_CHR);
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// we're done, yay!
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if (! position)
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return true;
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position++;
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// Create next sub path
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int sLen = (int)(position - fullPath);
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if (sLen > 0) {
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char *subPath = strndup(fullPath, sLen);
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if (!File::IsDirectory(subPath)) {
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File::CreateDir(subPath);
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}
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free(subPath);
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}
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// A safety check
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panicCounter--;
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if (panicCounter <= 0) {
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ERROR_LOG(COMMON, "CreateFullPath: directory stracture too deep");
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return false;
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}
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}
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}
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// Deletes a directory filename, returns true on success
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bool DeleteDir(const char *filename)
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{
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INFO_LOG(COMMON, "DeleteDir: directory %s", filename);
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// check if a directory
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if (!File::IsDirectory(filename)) {
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ERROR_LOG(COMMON, "DeleteDir: Not a directory %s",
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filename);
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return false;
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}
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#ifdef _WIN32
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if (::RemoveDirectory(filename))
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return true;
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#else
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if (rmdir(filename) == 0)
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return true;
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#endif
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ERROR_LOG(COMMON, "DeleteDir: %s: %s",
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filename, GetLastErrorMsg());
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return false;
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}
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// renames file srcFilename to destFilename, returns true on success
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bool Rename(const char *srcFilename, const char *destFilename)
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{
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INFO_LOG(COMMON, "Rename: %s --> %s",
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srcFilename, destFilename);
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if (rename(srcFilename, destFilename) == 0)
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return true;
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ERROR_LOG(COMMON, "Rename: failed %s --> %s: %s",
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srcFilename, destFilename, GetLastErrorMsg());
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return false;
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}
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// copies file srcFilename to destFilename, returns true on success
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bool Copy(const char *srcFilename, const char *destFilename)
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{
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INFO_LOG(COMMON, "Copy: %s --> %s",
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srcFilename, destFilename);
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#ifdef _WIN32
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if (CopyFile(srcFilename, destFilename, FALSE))
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return true;
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ERROR_LOG(COMMON, "Copy: failed %s --> %s: %s",
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srcFilename, destFilename, GetLastErrorMsg());
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return false;
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#else
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// buffer size
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#define BSIZE 1024
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char buffer[BSIZE];
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// Open input file
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FILE *input = fopen(srcFilename, "rb");
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if (!input)
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{
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ERROR_LOG(COMMON, "Copy: input failed %s --> %s: %s",
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srcFilename, destFilename, GetLastErrorMsg());
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return false;
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}
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// open output file
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FILE *output = fopen(destFilename, "wb");
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if (!output)
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{
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fclose(input);
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ERROR_LOG(COMMON, "Copy: output failed %s --> %s: %s",
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srcFilename, destFilename, GetLastErrorMsg());
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return false;
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}
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// copy loop
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while (!feof(input))
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{
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// read input
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int rnum = fread(buffer, sizeof(char), BSIZE, input);
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if (rnum != BSIZE)
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{
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if (ferror(input) != 0) {
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ERROR_LOG(COMMON,
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"Copy: failed reading from source, %s --> %s: %s",
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srcFilename, destFilename, GetLastErrorMsg());
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return false;
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}
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}
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// write output
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int wnum = fwrite(buffer, sizeof(char), rnum, output);
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if (wnum != rnum)
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{
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ERROR_LOG(COMMON,
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"Copy: failed writing to output, %s --> %s: %s",
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srcFilename, destFilename, GetLastErrorMsg());
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return false;
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}
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}
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// close flushs
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fclose(input);
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fclose(output);
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return true;
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#endif
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}
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// Returns a pointer to a string with a Dolphin data dir in the user's home directory.
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// To be used in "multi-user" mode (that is, installed).
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const char *GetUserDirectory()
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{
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// Make sure we only need to do it once
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static char path[MAX_PATH] = {0};
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if (strlen(path) > 0)
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return path;
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#ifdef WIN32
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char homedir[MAX_PATH];
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if (!SUCCEEDED(SHGetFolderPath(NULL, CSIDL_APPDATA, NULL, 0, path)))
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return NULL;
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#else
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char *homedir = getenv("HOME");
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if (!homedir)
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return NULL;
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#endif
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snprintf(path, sizeof(path), "%s" DIR_SEP DOLPHIN_DATA_DIR, homedir);
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INFO_LOG(COMMON, "GetUserDirectory: Setting to %s:", path);
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return path;
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}
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// Returns the size of filename (64bit)
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u64 GetSize(const char *filename)
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{
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if (!Exists(filename)) {
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WARN_LOG(COMMON, "GetSize: failed %s: No such file"
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,filename);
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return 0;
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}
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if (IsDirectory(filename)) {
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WARN_LOG(COMMON, "GetSize: failed %s: is a directory"
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,filename);
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return 0;
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}
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// on windows it's actually _stat64 defined in commonFuncs
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struct stat64 buf;
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if (stat64(filename, &buf) == 0) {
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return buf.st_size;
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}
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ERROR_LOG(COMMON, "GetSize: Stat failed %s: %s",
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filename, GetLastErrorMsg());
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return 0;
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}
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// creates an empty file filename, returns true on success
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bool CreateEmptyFile(const char *filename)
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{
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INFO_LOG(COMMON, "CreateEmptyFile: %s", filename);
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FILE *pFile = fopen(filename, "wb");
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if (!pFile) {
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ERROR_LOG(COMMON, "CreateEmptyFile: failed %s: %s",
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filename, GetLastErrorMsg());
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return false;
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}
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fclose(pFile);
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return true;
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}
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// Scans the directory tree gets, starting from _Directory and adds the
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// results into parentEntry. Returns the number of files+directories found
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u32 ScanDirectoryTree(const char *directory, FSTEntry& parentEntry)
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{
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INFO_LOG(COMMON, "ScanDirectoryTree: directory %s", directory);
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// How many files + directories we found
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u32 foundEntries = 0;
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char *virtualName;
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#ifdef _WIN32
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// Find the first file in the directory.
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WIN32_FIND_DATA ffd;
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char searchName[MAX_PATH + 3];
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strncpy(searchName, directory, MAX_PATH);
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strcat(searchName, "\\*");
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HANDLE hFind = FindFirstFile(searchName, &ffd);
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if (hFind == INVALID_HANDLE_VALUE) {
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FindClose(hFind);
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return foundEntries;
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}
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// windows loop
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do {
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FSTEntry entry;
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virtualName = ffd.cFileName;
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#else
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struct dirent dirent, *result = NULL;
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DIR *dirp = opendir(directory);
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if (!dirp)
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return 0;
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// non windows loop
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while (!readdir_r(dirp, &dirent, &result) && result) {
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FSTEntry entry;
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virtualName = result->d_name;
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#endif
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// check for "." and ".."
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if (((virtualName[0] == '.') && (virtualName[1] == '\0')) ||
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((virtualName[0] == '.') && (virtualName[1] == '.') &&
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(virtualName[2] == '\0')))
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continue;
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entry.virtualName = virtualName;
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entry.physicalName = directory;
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entry.physicalName += DIR_SEP + entry.virtualName;
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if (IsDirectory(entry.physicalName.c_str())) {
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entry.isDirectory = true;
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// is a directory, lets go inside
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entry.size = ScanDirectoryTree(entry.physicalName.c_str(), entry);
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foundEntries += (u32)entry.size;
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} else { // is a file
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entry.isDirectory = false;
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entry.size = GetSize(entry.physicalName.c_str());
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}
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++foundEntries;
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// Push into the tree
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parentEntry.children.push_back(entry);
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#ifdef _WIN32
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} while (FindNextFile(hFind, &ffd) != 0);
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FindClose(hFind);
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#else
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}
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closedir(dirp);
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#endif
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// Return number of entries found.
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return foundEntries;
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}
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// deletes the given directory and anything under it. Returns true on
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// success.
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bool DeleteDirRecursively(const char *directory)
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{
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INFO_LOG(COMMON, "DeleteDirRecursively: %s", directory);
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#ifdef _WIN32
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// Find the first file in the directory.
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WIN32_FIND_DATA ffd;
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char searchName[MAX_PATH + 3] = {0};
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strncpy(searchName, directory, MAX_PATH);
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strcat(searchName, "\\*");
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HANDLE hFind = FindFirstFile(searchName, &ffd);
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if (hFind == INVALID_HANDLE_VALUE) {
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FindClose(hFind);
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return false;
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}
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// windows loop
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do {
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char *virtualName = ffd.cFileName;
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#else
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struct dirent dirent, *result = NULL;
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DIR *dirp = opendir(directory);
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if (!dirp)
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return false;
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// non windows loop
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while (!readdir_r(dirp, &dirent, &result) && result) {
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char *virtualName = result->d_name;
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#endif
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// check for "." and ".."
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if (((virtualName[0] == '.') && (virtualName[1] == '\0')) ||
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((virtualName[0] == '.') && (virtualName[1] == '.') &&
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(virtualName[2] == '\0')))
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continue;
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char newPath[MAX_PATH];
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sprintf(newPath, "%s%c%s", directory, DIR_SEP_CHR, virtualName);
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if (IsDirectory(newPath)) {
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if (!DeleteDirRecursively(newPath))
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return false;
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} else {
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if (!File::Delete(newPath))
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return false;
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}
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#ifdef _WIN32
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} while (FindNextFile(hFind, &ffd) != 0);
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FindClose(hFind);
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#else
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}
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#endif
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File::DeleteDir(directory);
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return true;
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}
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// Returns the current directory, caller should free
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const char *GetCurrentDirectory()
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{
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const char *dir;
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// Get the current working directory (getcwd uses malloc)
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if (!(dir = getcwd(NULL, 0))) {
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ERROR_LOG(COMMON, "GetCurrentDirectory failed: %s",
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GetLastErrorMsg());
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return NULL;
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}
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return dir;
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}
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// Sets the current directory to the given directory
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bool SetCurrentDirectory(const char *_rDirectory)
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{
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return chdir(_rDirectory) == 0;
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}
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} // namespace
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