168 lines
4.0 KiB
C++
168 lines
4.0 KiB
C++
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/* REminiscence - Flashback interpreter
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* Copyright (C) 2005-2015 Gregory Montoir
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*
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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, either version 3 of the License, or
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* (at your option) any later version.
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*
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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 for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifdef _WIN32
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#define WIN32_LEAN_AND_MEAN
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#include <windows.h>
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#else
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#include <dirent.h>
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#include <sys/stat.h>
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#endif
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#include "fs.h"
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struct FileName {
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char *name;
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int dir;
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};
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struct FileSystem_impl {
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char **_dirsList;
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int _dirsCount;
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FileName *_filesList;
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int _filesCount;
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FileSystem_impl() :
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_dirsList(0), _dirsCount(0), _filesList(0), _filesCount(0) {
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}
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~FileSystem_impl() {
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for (int i = 0; i < _dirsCount; ++i) {
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free(_dirsList[i]);
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}
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free(_dirsList);
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for (int i = 0; i < _filesCount; ++i) {
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free(_filesList[i].name);
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}
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free(_filesList);
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}
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void setRootDirectory(const char *dir) {
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getPathListFromDirectory(dir);
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debug(DBG_FILE, "Found %d files and %d directories", _filesCount, _dirsCount);
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}
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char *findPath(const char *name) const {
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for (int i = 0; i < _filesCount; ++i) {
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if (strcasecmp(_filesList[i].name, name) == 0) {
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const char *dir = _dirsList[_filesList[i].dir];
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const int len = strlen(dir) + 1 + strlen(_filesList[i].name) + 1;
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char *p = (char *)malloc(len);
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if (p) {
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snprintf(p, len, "%s/%s", dir, _filesList[i].name);
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}
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return p;
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}
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}
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return 0;
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}
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void addPath(const char *dir, const char *name) {
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int index = -1;
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for (int i = 0; i < _dirsCount; ++i) {
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if (strcmp(_dirsList[i], dir) == 0) {
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index = i;
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break;
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}
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}
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if (index == -1) {
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_dirsList = (char **)realloc(_dirsList, (_dirsCount + 1) * sizeof(char *));
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if (_dirsList) {
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_dirsList[_dirsCount] = strdup(dir);
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index = _dirsCount;
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++_dirsCount;
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}
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}
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_filesList = (FileName *)realloc(_filesList, (_filesCount + 1) * sizeof(FileName));
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if (_filesList) {
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_filesList[_filesCount].name = strdup(name);
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_filesList[_filesCount].dir = index;
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++_filesCount;
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}
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}
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void getPathListFromDirectory(const char *dir);
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};
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#ifdef _WIN32
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void FileSystem_impl::getPathListFromDirectory(const char *dir) {
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WIN32_FIND_DATA findData;
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char searchPath[MAX_PATH];
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snprintf(searchPath, sizeof(searchPath), "%s/*", dir);
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HANDLE h = FindFirstFile(searchPath, &findData);
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if (h) {
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do {
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if (findData.cFileName[0] == '.') {
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continue;
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}
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char filePath[MAX_PATH];
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snprintf(filePath, sizeof(filePath), "%s/%s", dir, findData.cFileName);
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if (findData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) {
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getPathListFromDirectory(filePath);
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} else {
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addPath(dir, findData.cFileName);
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}
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} while (FindNextFile(h, &findData));
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FindClose(h);
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}
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}
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#else
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void FileSystem_impl::getPathListFromDirectory(const char *dir) {
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DIR *d = opendir(dir);
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if (d) {
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dirent *de;
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while ((de = readdir(d)) != NULL) {
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if (de->d_name[0] == '.') {
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continue;
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}
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char filePath[512];
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snprintf(filePath, sizeof(filePath), "%s/%s", dir, de->d_name);
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struct stat st;
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if (stat(filePath, &st) == 0) {
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if (S_ISDIR(st.st_mode)) {
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getPathListFromDirectory(filePath);
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} else {
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addPath(dir, de->d_name);
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}
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}
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}
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closedir(d);
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}
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}
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#endif
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FileSystem::FileSystem(const char *dataPath) {
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_impl = new FileSystem_impl;
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_impl->setRootDirectory(dataPath);
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}
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FileSystem::~FileSystem() {
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delete _impl;
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}
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char *FileSystem::findPath(const char *filename) const {
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return _impl->findPath(filename);
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}
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bool FileSystem::exists(const char *filename) const {
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char *path = findPath(filename);
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if (path) {
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free(path);
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}
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return path != 0;
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}
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