88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
/* Copyright (C) 2010 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. 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 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef INCLUDED_PS_FILESYSTEM
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#define INCLUDED_PS_FILESYSTEM
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#include "lib/path_util.h"
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#include "lib/file/file.h"
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#include "lib/file/io/io.h"
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#include "lib/file/vfs/vfs.h"
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#include "lib/file/file_system_util.h"
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#include "lib/file/io/write_buffer.h"
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#include "ps/CStr.h"
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#include "ps/Errors.h"
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extern PIVFS g_VFS;
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extern bool VfsFileExists(const PIVFS& vfs, const VfsPath& pathname);
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extern bool VfsFileExists(const VfsPath& pathname);
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/**
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* callback function type for file change notifications
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*/
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typedef LibError (*FileReloadFunc)(void* param, const VfsPath& path);
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/**
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* register a callback function to be called by ReloadChangedFiles
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*/
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void RegisterFileReloadFunc(FileReloadFunc func, void* obj);
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/**
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* delete a callback function registered with RegisterFileReloadFunc
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* (removes any with the same func and obj)
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*/
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void UnregisterFileReloadFunc(FileReloadFunc func, void* obj);
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/**
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* poll for directory change notifications and reload all affected files.
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* must be called regularly (e.g. once a frame), else notifications
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* may be lost.
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* note: polling is much simpler than asynchronous notifications.
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**/
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extern LibError ReloadChangedFiles();
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ERROR_GROUP(CVFSFile);
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ERROR_TYPE(CVFSFile, LoadFailed);
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ERROR_TYPE(CVFSFile, AlreadyLoaded);
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ERROR_TYPE(CVFSFile, InvalidBufferAccess);
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// Reads a file, then gives read-only access to the contents
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class CVFSFile
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{
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public:
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CVFSFile();
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~CVFSFile();
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// Returns either PSRETURN_OK or PSRETURN_CVFSFile_LoadFailed.
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// Dies if a file has already been successfully loaded.
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PSRETURN Load(const PIVFS& vfs, const VfsPath& filename);
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// These die if called when no file has been successfully loaded.
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const u8* GetBuffer() const;
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size_t GetBufferSize() const;
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CStr GetAsString() const;
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private:
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shared_ptr<u8> m_Buffer;
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size_t m_BufferSize;
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};
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#endif // #ifndef INCLUDED_PS_FILESYSTEM
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