ZRef<ZStreamerRPos> ZAssetRep_FS::OpenRPos()
{
if (fData)
return new StreamerMemory(this, fData, fDataSize);
if (fComps.empty())
return fSpec.OpenRPos();
string leaf = fComps.back();
if (leaf == "!binary" || leaf == "!string" || leaf == "!stringtable")
{
ZFileSpec branchSpec = fSpec.Trail(ZTrail(fComps.begin(), fComps.end() - 1));
if (branchSpec.IsFile())
{
// And the branch is a file, so we pretend that our specially named leaf exists.
return branchSpec.OpenRPos();
}
}
return fSpec.Trail(ZTrail(fComps.begin(), fComps.end())).OpenRPos();
}
ZRef<ZAssetRep> ZAssetRep_FS::ResolvePath(const char* iPath)
{
const char* pathStart = iPath;
if (pathStart == nullptr || pathStart[0] == 0)
{
// An empty path means us.
return this;
}
vector<string> newComps;
if (pathStart[0] == '|')
{
// A | prefix means we want our root, which is fSpec with an empty component vector.
++pathStart;
}
else
{
newComps = fComps;
}
const char* iter = pathStart;
for (;;)
{
switch (*iter)
{
case 0:
case '^':
case '|':
{
if (iter > pathStart)
newComps.push_back(string(pathStart, iter - pathStart));
pathStart = iter + 1;
if (*iter == '^')
{
if (newComps.empty())
{
// We're trying to get the parent of the root,
// which is an illegal asset reference.
return ZRef<ZAssetRep>();
}
newComps.pop_back();
}
}
}
if (*iter == 0)
break;
++iter;
}
if (newComps.empty())
{
if (fSpec.Exists())
return new ZAssetRep_FS(fSpec);
return ZRef<ZAssetRep>();
}
ZFileSpec branchSpec = fSpec.Trail(ZTrail(newComps.begin(), newComps.end() - 1));
if (!branchSpec.Exists())
{
// The branch doesn't exist, so neither can the full path.
return ZRef<ZAssetRep>();
}
// We know the branch exists.
string leaf = newComps.back();
if (leaf == "!binary" || leaf == "!string" || leaf == "!stringtable")
{
// We've got a leaf with a special name.
if (branchSpec.IsFile())
{
// And the branch is a file, so we pretend that our specially named leaf exists.
return new ZAssetRep_FS(fSpec, newComps);
}
}
if (fSpec.Trail(ZTrail(newComps.begin(), newComps.end())).Exists())
{
// Our spec plus the new components is an extant entity.
return new ZAssetRep_FS(fSpec, newComps);
}
return ZRef<ZAssetRep>();
}
