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100 lines
2.6 KiB
C++
100 lines
2.6 KiB
C++
/*
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* CArchiveLoader.h, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#pragma once
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#include "ISimpleResourceLoader.h"
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#include "ResourceID.h"
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VCMI_LIB_NAMESPACE_BEGIN
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class CFileInputStream;
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/**
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* A struct which holds information about the archive entry e.g. where it is located in space of the archive container.
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*/
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struct ArchiveEntry
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{
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/**
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* Default c-tor.
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*/
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ArchiveEntry();
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/** Entry name **/
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std::string name;
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/** Distance in bytes from beginning **/
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int offset;
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/** Size without compression in bytes **/
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int fullSize;
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/** Size with compression in bytes or 0 if not compressed **/
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int compressedSize;
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};
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/**
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* A class which can scan and load files of a LOD archive.
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*/
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class DLL_LINKAGE CArchiveLoader : public ISimpleResourceLoader
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{
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public:
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/**
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* Ctor.
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*
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* The file extension of the param archive determines the type of the Lod file.
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* These are valid extensions: .LOD, .SND, .VID
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*
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* @param archive Specifies the file path to the archive which should be indexed and loaded.
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*
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* @throws std::runtime_error if the archive wasn't found or if the archive isn't supported
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*/
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CArchiveLoader(std::string mountPoint, boost::filesystem::path archive);
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/// Interface implementation
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/// @see ISimpleResourceLoader
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std::unique_ptr<CInputStream> load(const ResourceID & resourceName) const override;
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bool existsResource(const ResourceID & resourceName) const override;
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std::string getMountPoint() const override;
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void updateFilteredFiles(std::function<bool(const std::string &)> filter) const override {}
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std::unordered_set<ResourceID> getFilteredFiles(std::function<bool(const ResourceID &)> filter) const override;
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private:
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/**
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* Initializes a LOD archive.
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*
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* @param fileStream File stream to the .lod archive
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*/
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void initLODArchive(const std::string &mountPoint, CFileInputStream & fileStream);
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/**
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* Initializes a VID archive.
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*
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* @param fileStream File stream to the .vid archive
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*/
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void initVIDArchive(const std::string &mountPoint, CFileInputStream & fileStream);
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/**
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* Initializes a SND archive.
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*
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* @param fileStream File stream to the .snd archive
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*/
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void initSNDArchive(const std::string &mountPoint, CFileInputStream & fileStream);
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/** The file path to the archive which is scanned and indexed. */
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boost::filesystem::path archive;
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std::string mountPoint;
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/** Holds all entries of the archive file. An entry can be accessed via the entry name. **/
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std::unordered_map<ResourceID, ArchiveEntry> entries;
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};
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VCMI_LIB_NAMESPACE_END
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