COMMON: Make more members of Archive constant.

16 files changed, 96 insertions, 96 deletions

diff --git a/common/archive.cpp b/common/archive.cpp
index 954de8bcaa..1323f14805 100644
--- a/common/archive.cpp
+++ b/common/archive.cpp
@@ -27,7 +27,7 @@
 
 namespace Common {
 
-GenericArchiveMember::GenericArchiveMember(String name, Archive *parent)
+GenericArchiveMember::GenericArchiveMember(const String &name, const Archive *parent)
 	: _parent(parent), _name(name) {
 }
 
@@ -40,14 +40,14 @@ SeekableReadStream *GenericArchiveMember::createReadStream() const {
 }
 
 
-int Archive::listMatchingMembers(ArchiveMemberList &list, const String &pattern) {
+int Archive::listMatchingMembers(ArchiveMemberList &list, const String &pattern) const {
 	// Get all "names" (TODO: "files" ?)
 	ArchiveMemberList allNames;
 	listMembers(allNames);
 
 	int matches = 0;
 
-	ArchiveMemberList::iterator it = allNames.begin();
+	ArchiveMemberList::const_iterator it = allNames.begin();
 	for ( ; it != allNames.end(); ++it) {
 		// TODO: We match case-insenstivie for now, our API does not define whether that's ok or not though...
 		// For our use case case-insensitive is probably what we want to have though.
@@ -206,11 +206,11 @@ void SearchSet::setPriority(const String &name, int priority) {
 	insert(node);
 }
 
-bool SearchSet::hasFile(const String &name) {
+bool SearchSet::hasFile(const String &name) const {
 	if (name.empty())
 		return false;
 
-	ArchiveNodeList::iterator it = _list.begin();
+	ArchiveNodeList::const_iterator it = _list.begin();
 	for ( ; it != _list.end(); ++it) {
 		if (it->_arc->hasFile(name))
 			return true;
@@ -219,31 +219,31 @@ bool SearchSet::hasFile(const String &name) {
 	return false;
 }
 
-int SearchSet::listMatchingMembers(ArchiveMemberList &list, const String &pattern) {
+int SearchSet::listMatchingMembers(ArchiveMemberList &list, const String &pattern) const {
 	int matches = 0;
 
-	ArchiveNodeList::iterator it = _list.begin();
+	ArchiveNodeList::const_iterator it = _list.begin();
 	for ( ; it != _list.end(); ++it)
 		matches += it->_arc->listMatchingMembers(list, pattern);
 
 	return matches;
 }
 
-int SearchSet::listMembers(ArchiveMemberList &list) {
+int SearchSet::listMembers(ArchiveMemberList &list) const {
 	int matches = 0;
 
-	ArchiveNodeList::iterator it = _list.begin();
+	ArchiveNodeList::const_iterator it = _list.begin();
 	for ( ; it != _list.end(); ++it)
 		matches += it->_arc->listMembers(list);
 
 	return matches;
 }
 
-ArchiveMemberPtr SearchSet::getMember(const String &name) {
+const ArchiveMemberPtr SearchSet::getMember(const String &name) const {
 	if (name.empty())
 		return ArchiveMemberPtr();
 
-	ArchiveNodeList::iterator it = _list.begin();
+	ArchiveNodeList::const_iterator it = _list.begin();
 	for ( ; it != _list.end(); ++it) {
 		if (it->_arc->hasFile(name))
 			return it->_arc->getMember(name);
diff --git a/common/archive.h b/common/archive.h
index c8e78f9bc8..ffd86d786d 100644
--- a/common/archive.h
+++ b/common/archive.h
@@ -65,10 +65,10 @@ class Archive;
  * is destroyed.
  */
 class GenericArchiveMember : public ArchiveMember {
-	Archive *_parent;
-	String _name;
+	const Archive *_parent;
+	const String _name;
 public:
-	GenericArchiveMember(String name, Archive *parent);
+	GenericArchiveMember(const String &name, const Archive *parent);
 	String getName() const;
 	SeekableReadStream *createReadStream() const;
 };
@@ -88,7 +88,7 @@ public:
 	 * Patterns are not allowed, as this is meant to be a quick File::exists()
 	 * replacement.
 	 */
-	virtual bool hasFile(const String &name) = 0;
+	virtual bool hasFile(const String &name) const = 0;
 
 	/**
 	 * Add all members of the Archive matching the specified pattern to list.
@@ -96,7 +96,7 @@ public:
 	 *
 	 * @return the number of members added to list
 	 */
-	virtual int listMatchingMembers(ArchiveMemberList &list, const String &pattern);
+	virtual int listMatchingMembers(ArchiveMemberList &list, const String &pattern) const;
 
 	/**
 	 * Add all members of the Archive to list.
@@ -104,12 +104,12 @@ public:
 	 *
 	 * @return the number of names added to list
 	 */
-	virtual int listMembers(ArchiveMemberList &list) = 0;
+	virtual int listMembers(ArchiveMemberList &list) const = 0;
 
 	/**
 	 * Returns a ArchiveMember representation of the given file.
 	 */
-	virtual ArchiveMemberPtr getMember(const String &name) = 0;
+	virtual const ArchiveMemberPtr getMember(const String &name) const = 0;
 
 	/**
 	 * Create a stream bound to a member with the specified name in the
@@ -230,11 +230,11 @@ public:
 	 */
 	void setPriority(const String& name, int priority);
 
-	virtual bool hasFile(const String &name);
-	virtual int listMatchingMembers(ArchiveMemberList &list, const String &pattern);
-	virtual int listMembers(ArchiveMemberList &list);
+	virtual bool hasFile(const String &name) const;
+	virtual int listMatchingMembers(ArchiveMemberList &list, const String &pattern) const;
+	virtual int listMembers(ArchiveMemberList &list) const;
 
-	virtual ArchiveMemberPtr getMember(const String &name);
+	virtual const ArchiveMemberPtr getMember(const String &name) const;
 
 	/**
 	 * Implements createReadStreamForMember from Archive base class. The current policy is
diff --git a/common/fs.cpp b/common/fs.cpp
index 4b56cc4594..8ea96e458a 100644
--- a/common/fs.cpp
+++ b/common/fs.cpp
@@ -197,7 +197,7 @@ FSNode *FSDirectory::lookupCache(NodeCache &cache, const String &name) const {
 	return 0;
 }
 
-bool FSDirectory::hasFile(const String &name) {
+bool FSDirectory::hasFile(const String &name) const {
 	if (name.empty() || !_node.isDirectory())
 		return false;
 
@@ -205,7 +205,7 @@ bool FSDirectory::hasFile(const String &name) {
 	return node && node->exists();
 }
 
-ArchiveMemberPtr FSDirectory::getMember(const String &name) {
+const ArchiveMemberPtr FSDirectory::getMember(const String &name) const {
 	if (name.empty() || !_node.isDirectory())
 		return ArchiveMemberPtr();
 
@@ -295,7 +295,7 @@ void FSDirectory::ensureCached() const  {
 	_cached = true;
 }
 
-int FSDirectory::listMatchingMembers(ArchiveMemberList &list, const String &pattern) {
+int FSDirectory::listMatchingMembers(ArchiveMemberList &list, const String &pattern) const {
 	if (!_node.isDirectory())
 		return 0;
 
@@ -308,7 +308,7 @@ int FSDirectory::listMatchingMembers(ArchiveMemberList &list, const String &patt
 	lowercasePattern.toLowercase();
 
 	int matches = 0;
-	NodeCache::iterator it = _fileCache.begin();
+	NodeCache::const_iterator it = _fileCache.begin();
 	for ( ; it != _fileCache.end(); ++it) {
 		if (it->_key.matchString(lowercasePattern, false, true)) {
 			list.push_back(ArchiveMemberPtr(new FSNode(it->_value)));
@@ -318,7 +318,7 @@ int FSDirectory::listMatchingMembers(ArchiveMemberList &list, const String &patt
 	return matches;
 }
 
-int FSDirectory::listMembers(ArchiveMemberList &list) {
+int FSDirectory::listMembers(ArchiveMemberList &list) const {
 	if (!_node.isDirectory())
 		return 0;
 
@@ -326,7 +326,7 @@ int FSDirectory::listMembers(ArchiveMemberList &list) {
 	ensureCached();
 
 	int files = 0;
-	for (NodeCache::iterator it = _fileCache.begin(); it != _fileCache.end(); ++it) {
+	for (NodeCache::const_iterator it = _fileCache.begin(); it != _fileCache.end(); ++it) {
 		list.push_back(ArchiveMemberPtr(new FSNode(it->_value)));
 		++files;
 	}
diff --git a/common/fs.h b/common/fs.h
index aeaa14718e..fadd672bb1 100644
--- a/common/fs.h
+++ b/common/fs.h
@@ -318,23 +318,23 @@ public:
 	 * Checks for existence in the cache. A full match of relative path and filename is needed
 	 * for success.
 	 */
-	virtual bool hasFile(const String &name);
+	virtual bool hasFile(const String &name) const;
 
 	/**
 	 * Returns a list of matching file names. Pattern can use GLOB wildcards.
 	 */
-	virtual int listMatchingMembers(ArchiveMemberList &list, const String &pattern);
+	virtual int listMatchingMembers(ArchiveMemberList &list, const String &pattern) const;
 
 	/**
 	 * Returns a list of all the files in the cache.
 	 */
-	virtual int listMembers(ArchiveMemberList &list);
+	virtual int listMembers(ArchiveMemberList &list) const;
 
 	/**
 	 * Get a ArchiveMember representation of the specified file. A full match of relative
 	 * path and filename is needed for success.
 	 */
-	virtual ArchiveMemberPtr getMember(const String &name);
+	virtual const ArchiveMemberPtr getMember(const String &name) const;
 
 	/**
 	 * Open the specified file. A full match of relative path and filename is needed
diff --git a/common/unarj.cpp b/common/unarj.cpp
index cccc330bb5..fe3c17a2ac 100644
--- a/common/unarj.cpp
+++ b/common/unarj.cpp
@@ -701,9 +701,9 @@ public:
 	virtual ~ArjArchive();
 
 	// Archive implementation
-	virtual bool hasFile(const String &name);
-	virtual int listMembers(ArchiveMemberList &list);
-	virtual ArchiveMemberPtr getMember(const String &name);
+	virtual bool hasFile(const String &name) const;
+	virtual int listMembers(ArchiveMemberList &list) const;
+	virtual const ArchiveMemberPtr getMember(const String &name) const;
 	virtual SeekableReadStream *createReadStreamForMember(const String &name) const;
 };
 
@@ -745,14 +745,14 @@ ArjArchive::~ArjArchive() {
 	}
 }
 
-bool ArjArchive::hasFile(const String &name) {
+bool ArjArchive::hasFile(const String &name) const {
 	return _headers.contains(name);
 }
 
-int ArjArchive::listMembers(ArchiveMemberList &list) {
+int ArjArchive::listMembers(ArchiveMemberList &list) const {
 	int matches = 0;
 
-	ArjHeadersMap::iterator it = _headers.begin();
+	ArjHeadersMap::const_iterator it = _headers.begin();
 	for ( ; it != _headers.end(); ++it) {
 		list.push_back(ArchiveMemberList::value_type(new GenericArchiveMember(it->_value->filename, this)));
 		matches++;
@@ -761,7 +761,7 @@ int ArjArchive::listMembers(ArchiveMemberList &list) {
 	return matches;
 }
 
-ArchiveMemberPtr ArjArchive::getMember(const String &name) {
+const ArchiveMemberPtr ArjArchive::getMember(const String &name) const {
 	if (!hasFile(name))
 		return ArchiveMemberPtr();
 
diff --git a/common/unzip.cpp b/common/unzip.cpp
index 8650c91866..8061f712d4 100644
--- a/common/unzip.cpp
+++ b/common/unzip.cpp
@@ -1426,9 +1426,9 @@ public:
 
 	~ZipArchive();
 
-	virtual bool hasFile(const String &name);
-	virtual int listMembers(ArchiveMemberList &list);
-	virtual ArchiveMemberPtr getMember(const String &name);
+	virtual bool hasFile(const String &name) const;
+	virtual int listMembers(ArchiveMemberList &list) const;
+	virtual const ArchiveMemberPtr getMember(const String &name) const;
 	virtual SeekableReadStream *createReadStreamForMember(const String &name) const;
 };
 
@@ -1458,11 +1458,11 @@ ZipArchive::~ZipArchive() {
 	unzClose(_zipFile);
 }
 
-bool ZipArchive::hasFile(const String &name) {
+bool ZipArchive::hasFile(const String &name) const {
 	return (unzLocateFile(_zipFile, name.c_str(), 2) == UNZ_OK);
 }
 
-int ZipArchive::listMembers(ArchiveMemberList &list) {
+int ZipArchive::listMembers(ArchiveMemberList &list) const {
 	int matches = 0;
 	int err = unzGoToFirstFile(_zipFile);
 
@@ -1481,7 +1481,7 @@ int ZipArchive::listMembers(ArchiveMemberList &list) {
 	return matches;
 }
 
-ArchiveMemberPtr ZipArchive::getMember(const String &name) {
+const ArchiveMemberPtr ZipArchive::getMember(const String &name) const {
 	if (!hasFile(name))
 		return ArchiveMemberPtr();
 
diff --git a/engines/agos/installshield_cab.cpp b/engines/agos/installshield_cab.cpp
index ac4e40d1d1..d4e636f7b3 100644
--- a/engines/agos/installshield_cab.cpp
+++ b/engines/agos/installshield_cab.cpp
@@ -60,9 +60,9 @@ public:
 	~InstallShieldCabinet();
 
 	// Common::Archive API implementation
-	bool hasFile(const Common::String &name);
-	int listMembers(Common::ArchiveMemberList &list);
-	Common::ArchiveMemberPtr getMember(const Common::String &name);
+	bool hasFile(const Common::String &name) const;
+	int listMembers(Common::ArchiveMemberList &list) const;
+	const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
 	Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
 
 private:
@@ -161,18 +161,18 @@ InstallShieldCabinet::InstallShieldCabinet(const Common::String &filename) : _in
 	delete[] fileTableOffsets;
 }
 
-bool InstallShieldCabinet::hasFile(const Common::String &name) {
+bool InstallShieldCabinet::hasFile(const Common::String &name) const {
 	return _map.contains(name);
 }
 
-int InstallShieldCabinet::listMembers(Common::ArchiveMemberList &list) {
+int InstallShieldCabinet::listMembers(Common::ArchiveMemberList &list) const {
 	for (FileMap::const_iterator it = _map.begin(); it != _map.end(); it++)
 		list.push_back(getMember(it->_key));
 
 	return _map.size();
 }
 
-Common::ArchiveMemberPtr InstallShieldCabinet::getMember(const Common::String &name) {
+const Common::ArchiveMemberPtr InstallShieldCabinet::getMember(const Common::String &name) const {
 	return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
 }
 
diff --git a/engines/kyra/resource_intern.cpp b/engines/kyra/resource_intern.cpp
index 482bd1a5d6..f9aae2c550 100644
--- a/engines/kyra/resource_intern.cpp
+++ b/engines/kyra/resource_intern.cpp
@@ -37,11 +37,11 @@ PlainArchive::PlainArchive(Common::ArchiveMemberPtr file)
 	: _file(file), _files() {
 }
 
-bool PlainArchive::hasFile(const Common::String &name) {
+bool PlainArchive::hasFile(const Common::String &name) const {
 	return (_files.find(name) != _files.end());
 }
 
-int PlainArchive::listMembers(Common::ArchiveMemberList &list) {
+int PlainArchive::listMembers(Common::ArchiveMemberList &list) const {
 	int count = 0;
 
 	for (FileMap::const_iterator i = _files.begin(); i != _files.end(); ++i) {
@@ -52,7 +52,7 @@ int PlainArchive::listMembers(Common::ArchiveMemberList &list) {
 	return count;
 }
 
-Common::ArchiveMemberPtr PlainArchive::getMember(const Common::String &name) {
+const Common::ArchiveMemberPtr PlainArchive::getMember(const Common::String &name) const {
 	if (!hasFile(name))
 		return Common::ArchiveMemberPtr();
 
@@ -92,11 +92,11 @@ TlkArchive::~TlkArchive() {
 	delete[] _fileEntries;
 }
 
-bool TlkArchive::hasFile(const Common::String &name) {
+bool TlkArchive::hasFile(const Common::String &name) const {
 	return (findFile(name) != 0);
 }
 
-int TlkArchive::listMembers(Common::ArchiveMemberList &list) {
+int TlkArchive::listMembers(Common::ArchiveMemberList &list) const {
 	uint count = 0;
 
 	for (; count < _entryCount; ++count) {
@@ -107,7 +107,7 @@ int TlkArchive::listMembers(Common::ArchiveMemberList &list) {
 	return count;
 }
 
-Common::ArchiveMemberPtr TlkArchive::getMember(const Common::String &name) {
+const Common::ArchiveMemberPtr TlkArchive::getMember(const Common::String &name) const {
 	if (!hasFile(name))
 		return Common::ArchiveMemberPtr();
 
@@ -186,11 +186,11 @@ CachedArchive::~CachedArchive() {
 	_files.clear();
 }
 
-bool CachedArchive::hasFile(const Common::String &name) {
+bool CachedArchive::hasFile(const Common::String &name) const {
 	return (_files.find(name) != _files.end());
 }
 
-int CachedArchive::listMembers(Common::ArchiveMemberList &list) {
+int CachedArchive::listMembers(Common::ArchiveMemberList &list) const {
 	int count = 0;
 
 	for (FileMap::const_iterator i = _files.begin(); i != _files.end(); ++i) {
@@ -201,7 +201,7 @@ int CachedArchive::listMembers(Common::ArchiveMemberList &list) {
 	return count;
 }
 
-Common::ArchiveMemberPtr CachedArchive::getMember(const Common::String &name) {
+const Common::ArchiveMemberPtr CachedArchive::getMember(const Common::String &name) const {
 	if (!hasFile(name))
 		return Common::ArchiveMemberPtr();
 
diff --git a/engines/kyra/resource_intern.h b/engines/kyra/resource_intern.h
index 03c9d871e8..9d9574d823 100644
--- a/engines/kyra/resource_intern.h
+++ b/engines/kyra/resource_intern.h
@@ -49,9 +49,9 @@ public:
 	Entry getFileEntry(const Common::String &name) const;
 
 	// Common::Archive API implementation
-	bool hasFile(const Common::String &name);
-	int listMembers(Common::ArchiveMemberList &list);
-	Common::ArchiveMemberPtr getMember(const Common::String &name);
+	bool hasFile(const Common::String &name) const;
+	int listMembers(Common::ArchiveMemberList &list) const;
+	const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
 	Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
 private:
 	typedef Common::HashMap<Common::String, Entry, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> FileMap;
@@ -65,9 +65,9 @@ public:
 	TlkArchive(Common::ArchiveMemberPtr file, uint16 entryCount, const uint32 *fileEntries);
 	~TlkArchive();
 
-	bool hasFile(const Common::String &name);
-	int listMembers(Common::ArchiveMemberList &list);
-	Common::ArchiveMemberPtr getMember(const Common::String &name);
+	bool hasFile(const Common::String &name) const;
+	int listMembers(Common::ArchiveMemberList &list) const;
+	const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
 	Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
 private:
 	Common::ArchiveMemberPtr _file;
@@ -92,9 +92,9 @@ public:
 	CachedArchive(const FileInputList &files);
 	~CachedArchive();
 
-	bool hasFile(const Common::String &name);
-	int listMembers(Common::ArchiveMemberList &list);
-	Common::ArchiveMemberPtr getMember(const Common::String &name);
+	bool hasFile(const Common::String &name) const;
+	int listMembers(Common::ArchiveMemberList &list) const;
+	const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
 	Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
 private:
 	struct Entry {
diff --git a/engines/lastexpress/data/archive.cpp b/engines/lastexpress/data/archive.cpp
index 3aa5584ca4..908d58254a 100644
--- a/engines/lastexpress/data/archive.cpp
+++ b/engines/lastexpress/data/archive.cpp
@@ -74,11 +74,11 @@ HPFArchive::HPFArchive(const Common::String &path) {
 	delete archive;
 }
 
-bool HPFArchive::hasFile(const Common::String &name) {
+bool HPFArchive::hasFile(const Common::String &name) const {
 	return (_files.find(name) != _files.end());
 }
 
-int HPFArchive::listMembers(Common::ArchiveMemberList &list) {
+int HPFArchive::listMembers(Common::ArchiveMemberList &list) const {
 	int numMembers = 0;
 
 	for (FileMap::const_iterator i = _files.begin(); i != _files.end(); ++i) {
@@ -89,7 +89,7 @@ int HPFArchive::listMembers(Common::ArchiveMemberList &list) {
 	return numMembers;
 }
 
-Common::ArchiveMemberPtr HPFArchive::getMember(const Common::String &name) {
+const Common::ArchiveMemberPtr HPFArchive::getMember(const Common::String &name) const {
 	if (!hasFile(name))
 		return Common::ArchiveMemberPtr();
 
diff --git a/engines/lastexpress/data/archive.h b/engines/lastexpress/data/archive.h
index 8e0c46f183..011c830668 100644
--- a/engines/lastexpress/data/archive.h
+++ b/engines/lastexpress/data/archive.h
@@ -46,9 +46,9 @@ class HPFArchive : public Common::Archive {
 public:
 	HPFArchive(const Common::String &path);
 
-	bool hasFile(const Common::String &name);
-	int listMembers(Common::ArchiveMemberList &list);
-	Common::ArchiveMemberPtr getMember(const Common::String &name);
+	bool hasFile(const Common::String &name) const;
+	int listMembers(Common::ArchiveMemberList &list) const;
+	const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
 	Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
 
 	int count() { return _files.size(); }
diff --git a/engines/lastexpress/resource.cpp b/engines/lastexpress/resource.cpp
index 3910aaa010..ee4885e34e 100644
--- a/engines/lastexpress/resource.cpp
+++ b/engines/lastexpress/resource.cpp
@@ -148,8 +148,8 @@ Common::SeekableReadStream *ResourceManager::getFileStream(const Common::String
 //////////////////////////////////////////////////////////////////////////
 // Archive functions
 //////////////////////////////////////////////////////////////////////////
-bool ResourceManager::hasFile(const Common::String &name) {
-	for (Common::Array<HPFArchive *>::iterator it = _archives.begin(); it != _archives.end(); ++it) {
+bool ResourceManager::hasFile(const Common::String &name) const {
+	for (Common::Array<HPFArchive *>::const_iterator it = _archives.begin(); it != _archives.end(); ++it) {
 		if ((*it)->hasFile(name))
 			return true;
 	}
@@ -157,10 +157,10 @@ bool ResourceManager::hasFile(const Common::String &name) {
 	return false;
 }
 
-int ResourceManager::listMembers(Common::ArchiveMemberList &list) {
+int ResourceManager::listMembers(Common::ArchiveMemberList &list) const {
 	int count = 0;
 
-	for (Common::Array<HPFArchive *>::iterator it = _archives.begin(); it != _archives.end(); ++it) {
+	for (Common::Array<HPFArchive *>::const_iterator it = _archives.begin(); it != _archives.end(); ++it) {
 
 		Common::ArchiveMemberList members;
 		count += (*it)->listMembers(members);
@@ -171,7 +171,7 @@ int ResourceManager::listMembers(Common::ArchiveMemberList &list) {
 	return count;
 }
 
-Common::ArchiveMemberPtr ResourceManager::getMember(const Common::String &name) {
+const Common::ArchiveMemberPtr ResourceManager::getMember(const Common::String &name) const {
 	if (!hasFile(name))
 		return Common::ArchiveMemberPtr();
 
diff --git a/engines/lastexpress/resource.h b/engines/lastexpress/resource.h
index 9e05a90399..f2f5d63bce 100644
--- a/engines/lastexpress/resource.h
+++ b/engines/lastexpress/resource.h
@@ -45,9 +45,9 @@ public:
 	Common::SeekableReadStream *getFileStream(const Common::String &name);
 
 	// Archive functions
-	bool hasFile(const Common::String &name);
-	int listMembers(Common::ArchiveMemberList &list);
-	Common::ArchiveMemberPtr getMember(const Common::String &name);
+	bool hasFile(const Common::String &name) const;
+	int listMembers(Common::ArchiveMemberList &list) const;
+	const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
 	Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
 
 	// Resource loading
diff --git a/engines/mohawk/installer_archive.cpp b/engines/mohawk/installer_archive.cpp
index 83796158a6..636b7ae476 100644
--- a/engines/mohawk/installer_archive.cpp
+++ b/engines/mohawk/installer_archive.cpp
@@ -107,18 +107,18 @@ void InstallerArchive::close() {
 	_map.clear();
 }
 
-bool InstallerArchive::hasFile(const Common::String &name) {
+bool InstallerArchive::hasFile(const Common::String &name) const {
 	return _map.contains(name);
 }
 
-int InstallerArchive::listMembers(Common::ArchiveMemberList &list) {
+int InstallerArchive::listMembers(Common::ArchiveMemberList &list) const {
 	for (FileMap::const_iterator it = _map.begin(); it != _map.end(); it++)
 		list.push_back(getMember(it->_key));
 
 	return _map.size();
 }
 
-Common::ArchiveMemberPtr InstallerArchive::getMember(const Common::String &name) {
+const Common::ArchiveMemberPtr InstallerArchive::getMember(const Common::String &name) const {
 	return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, this));
 }
 
diff --git a/engines/mohawk/installer_archive.h b/engines/mohawk/installer_archive.h
index 27877d69f9..89d2d85f8d 100644
--- a/engines/mohawk/installer_archive.h
+++ b/engines/mohawk/installer_archive.h
@@ -43,9 +43,9 @@ public:
 	bool isOpen() const { return _stream != 0; }
 
 	// Common::Archive API implementation
-	bool hasFile(const Common::String &name);
-	int listMembers(Common::ArchiveMemberList &list);
-	Common::ArchiveMemberPtr getMember(const Common::String &name);
+	bool hasFile(const Common::String &name) const;
+	int listMembers(Common::ArchiveMemberList &list) const;
+	const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
 	Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
 
 private:
diff --git a/engines/parallaction/disk_ns.cpp b/engines/parallaction/disk_ns.cpp
index 05ea60f510..e145743f09 100644
--- a/engines/parallaction/disk_ns.cpp
+++ b/engines/parallaction/disk_ns.cpp
@@ -73,9 +73,9 @@ public:
 	~NSArchive();
 
 	Common::SeekableReadStream *createReadStreamForMember(const Common::String &name) const;
-	bool hasFile(const Common::String &name);
-	int listMembers(Common::ArchiveMemberList &list);
-	Common::ArchiveMemberPtr getMember(const Common::String &name);
+	bool hasFile(const Common::String &name) const;
+	int listMembers(Common::ArchiveMemberList &list) const;
+	const Common::ArchiveMemberPtr getMember(const Common::String &name) const;
 };
 
 
@@ -137,23 +137,23 @@ Common::SeekableReadStream *NSArchive::createReadStreamForMember(const Common::S
 	return new Common::SeekableSubReadStream(_stream, offset, endOffset, DisposeAfterUse::NO);
 }
 
-bool NSArchive::hasFile(const Common::String &name) {
+bool NSArchive::hasFile(const Common::String &name) const {
 	if (name.empty())
 		return false;
 	return lookup(name.c_str()) != _numFiles;
 }
 
-int NSArchive::listMembers(Common::ArchiveMemberList &list) {
+int NSArchive::listMembers(Common::ArchiveMemberList &list) const {
 	for (uint32 i = 0; i < _numFiles; i++) {
 		list.push_back(Common::SharedPtr<Common::GenericArchiveMember>(new Common::GenericArchiveMember(_archiveDir[i], this)));
 	}
 	return _numFiles;
 }
 
-Common::ArchiveMemberPtr NSArchive::getMember(const Common::String &name) {
+const Common::ArchiveMemberPtr NSArchive::getMember(const Common::String &name) const {
 	uint32 index = lookup(name.c_str());
 
-	char *item = 0;
+	const char *item = 0;
 	if (index < _numFiles) {
 		item = _archiveDir[index];
 	}