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ARCHIVE: Allow creating InstallShieldV3 archives with FSNode

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This commit is contained in:
Kaloyan Chehlarski 2023-08-17 16:05:17 +03:00 committed by Eugene Sandulenko
parent c598e60e5e
commit 1a08bcc08f
2 changed files with 63 additions and 42 deletions

102
common/compression/installshieldv3_archive.cpp

@ -42,6 +42,65 @@ bool InstallShieldV3::open(const Common::String &filename) {
if (!_stream)
return false;
return read();
}
bool InstallShieldV3::open(const Common::FSNode &node) {
close();
_stream = node.createReadStream();
if (!_stream)
return false;
return read();
}
void InstallShieldV3::close() {
delete _stream; _stream = nullptr;
_map.clear();
}
bool InstallShieldV3::hasFile(const Common::Path &path) const {
Common::String name = path.toString();
return _map.contains(name);
}
int InstallShieldV3::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();
}
const Common::ArchiveMemberPtr InstallShieldV3::getMember(const Common::Path &path) const {
Common::String name = path.toString();
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, *this));
}
Common::SeekableReadStream *InstallShieldV3::createReadStreamForMember(const Common::Path &path) const {
Common::String name = path.toString();
// Make sure "/" is converted to "\"
while (name.contains("/"))
Common::replace(name, "/", "\\");
if (!_stream || !_map.contains(name))
return nullptr;
const FileEntry &entry = _map[name];
// Seek to our offset and then send it off to the decompressor
_stream->seek(entry.offset);
return Common::decompressDCL(_stream, entry.compressedSize, entry.uncompressedSize);
}
char InstallShieldV3::getPathSeparator() const {
return '\\';
}
bool InstallShieldV3::read() {
assert(_stream);
// Check for the magic uint32
// No idea what it means, but it's how "file" recognizes them
if (_stream->readUint32BE() != 0x135D658C) {
@ -112,49 +171,8 @@ bool InstallShieldV3::open(const Common::String &filename) {
entry.offset, entry.compressedSize, entry.uncompressedSize);
}
}
return true;
}
void InstallShieldV3::close() {
delete _stream; _stream = nullptr;
_map.clear();
}
bool InstallShieldV3::hasFile(const Common::Path &path) const {
Common::String name = path.toString();
return _map.contains(name);
}
int InstallShieldV3::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();
}
const Common::ArchiveMemberPtr InstallShieldV3::getMember(const Common::Path &path) const {
Common::String name = path.toString();
return Common::ArchiveMemberPtr(new Common::GenericArchiveMember(name, *this));
}
Common::SeekableReadStream *InstallShieldV3::createReadStreamForMember(const Common::Path &path) const {
Common::String name = path.toString();
// Make sure "/" is converted to "\"
while (name.contains("/"))
Common::replace(name, "/", "\\");
if (!_stream || !_map.contains(name))
return nullptr;
const FileEntry &entry = _map[name];
// Seek to our offset and then send it off to the decompressor
_stream->seek(entry.offset);
return Common::decompressDCL(_stream, entry.compressedSize, entry.uncompressedSize);
}
char InstallShieldV3::getPathSeparator() const {
return '\\';
}
} // End of namespace Common

3
common/compression/installshieldv3_archive.h

@ -38,6 +38,7 @@ public:
~InstallShieldV3() override;
bool open(const Common::String &filename);
bool open(const Common::FSNode &node);
void close();
bool isOpen() const { return _stream != nullptr; }
@ -55,6 +56,8 @@ private:
uint32 offset;
};
bool read();
Common::SeekableReadStream *_stream;
typedef Common::HashMap<Common::String, FileEntry, Common::IgnoreCase_Hash, Common::IgnoreCase_EqualTo> FileMap;