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added TransientFilePack

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svn-id: r48314
This commit is contained in:
Vladimir Menshakov 2010-03-20 13:52:08 +00:00
parent e117783379
commit 23f63e7531
2 changed files with 94 additions and 2 deletions
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80
engines/teenagent/pack.cpp
View File

@ -77,11 +77,87 @@ uint32 FilePack::read(uint32 id, byte *dst, uint32 size) const {
Common::SeekableReadStream *FilePack::getStream(uint32 id) const {
if (id < 1 || id > _fileCount)
return 0;
return NULL;
//debug(0, "stream: %04x-%04x", offsets[id - 1], offsets[id]);
return new Common::SeekableSubReadStream(&file, offsets[id - 1], offsets[id], DisposeAfterUse::NO);
file.seek(offsets[id - 1]);
uint32 size = offsets[id] - offsets[id - 1];
byte *ptr = (byte *)malloc(size);
if (ptr == NULL)
return NULL;
uint32 r = file.read(ptr, size);
return new Common::MemoryReadStream(ptr, r, DisposeAfterUse::YES);
}
TransientFilePack::TransientFilePack() : offsets(0) {}
TransientFilePack::~TransientFilePack() {
close();
}
void TransientFilePack::close() {
delete[] offsets;
offsets = NULL;
_filename.clear();
}
bool TransientFilePack::open(const Common::String &filename) {
_filename = filename;
Common::File file;
if (!file.open(filename))
return false;
_fileCount = file.readUint32LE();
debug(0, "opened %s, found %u entries", filename.c_str(), _fileCount);
offsets = new uint32[_fileCount + 1];
for (uint32 i = 0; i <= _fileCount; ++i) {
offsets[i] = file.readUint32LE();
}
return true;
}
uint32 TransientFilePack::getSize(uint32 id) const {
if (id < 1 || id > _fileCount)
return 0;
return offsets[id] - offsets[id - 1];
}
uint32 TransientFilePack::read(uint32 id, byte *dst, uint32 size) const {
if (id < 1 || id > _fileCount)
return 0;
Common::File file;
if (!file.open(_filename))
return 0;
file.seek(offsets[id - 1]);
uint32 rsize = offsets[id] - offsets[id - 1];
uint32 r = file.read(dst, MIN(rsize, size));
file.close();
//debug(0, "read(%u, %u) = %u", id, size, r);
return r;
}
Common::SeekableReadStream *TransientFilePack::getStream(uint32 id) const {
if (id < 1 || id > _fileCount)
return NULL;
//debug(0, "stream: %04x-%04x", offsets[id - 1], offsets[id]);
Common::File file;
if (!file.open(_filename))
return NULL;
file.seek(offsets[id - 1]);
uint32 size = offsets[id] - offsets[id - 1];
byte *ptr = (byte *)malloc(size);
if (ptr == NULL)
return NULL;
uint32 r = file.read(ptr, size);
file.close();
return new Common::MemoryReadStream(ptr, r, DisposeAfterUse::YES);
}
void MemoryPack::close() {
chunks.clear();
}

16
engines/teenagent/pack.h
View File

@ -62,6 +62,22 @@ public:
virtual Common::SeekableReadStream *getStream(uint32 id) const;
};
class TransientFilePack : public Pack {
uint32 *offsets;
Common::String _filename;
public:
TransientFilePack();
~TransientFilePack();
virtual bool open(const Common::String &filename);
virtual void close();
virtual uint32 getSize(uint32 id) const;
virtual uint32 read(uint32 id, byte *dst, uint32 size) const;
virtual Common::SeekableReadStream *getStream(uint32 id) const;
};
class MemoryPack : public Pack {
struct Chunk {
byte *data;