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387722d41e
improvements from work: - no longer export classes; instead inline functions where it makes sense (e.g. the scope timers) or export the member functions directly - fix icc11 warnings - add some comments This was SVN commit r6531.
81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
/**
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* =========================================================================
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* File : vfs_lookup.cpp
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* Project : 0 A.D.
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* Description : look up directories/files by traversing path components.
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* =========================================================================
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*/
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// license: GPL; see lib/license.txt
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#include "precompiled.h"
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#include "vfs_lookup.h"
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#include "lib/path_util.h" // path_foreach_component
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#include "vfs.h" // error codes
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#include "vfs_tree.h"
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#include "vfs_populate.h"
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#include "lib/timer.h"
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LibError vfs_Lookup(const VfsPath& pathname, VfsDirectory* startDirectory, VfsDirectory*& directory, VfsFile** pfile, size_t flags)
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{
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// extract and validate flags (ensure no unknown bits are set)
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const bool addMissingDirectories = (flags & VFS_LOOKUP_ADD) != 0;
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const bool createMissingDirectories = (flags & VFS_LOOKUP_CREATE) != 0;
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debug_assert((flags & ~(VFS_LOOKUP_ADD|VFS_LOOKUP_CREATE)) == 0);
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if(pfile)
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*pfile = 0;
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directory = startDirectory;
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RETURN_ERR(vfs_Populate(directory));
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// early-out for pathname == "" when mounting into VFS root
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if(pathname.empty()) // (prevent iterator error in loop end condition)
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return INFO::OK;
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// for each directory component:
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VfsPath::iterator it; // (used outside of loop to get filename)
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for(it = pathname.begin(); it != --pathname.end(); ++it)
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{
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const std::string& subdirectoryName = *it;
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VfsDirectory* subdirectory = directory->GetSubdirectory(subdirectoryName);
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if(!subdirectory)
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{
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if(addMissingDirectories)
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subdirectory = directory->AddSubdirectory(subdirectoryName);
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else
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return ERR::VFS_DIR_NOT_FOUND; // NOWARN
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}
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if(createMissingDirectories && !subdirectory->AssociatedDirectory())
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{
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Path currentPath;
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if(directory->AssociatedDirectory()) // (is NULL when mounting into root)
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currentPath = directory->AssociatedDirectory()->GetPath()/subdirectoryName;
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if(mkdir(currentPath.external_directory_string().c_str(), S_IRWXO|S_IRWXU|S_IRWXG) == 0)
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{
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PRealDirectory realDirectory(new RealDirectory(currentPath, 0, 0));
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RETURN_ERR(vfs_Attach(subdirectory, realDirectory));
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}
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}
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RETURN_ERR(vfs_Populate(subdirectory));
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directory = subdirectory;
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}
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if(pfile)
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{
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const std::string& filename = *it;
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debug_assert(filename != "."); // asked for file but specified directory path
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*pfile = directory->GetFile(filename);
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if(!*pfile)
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return ERR::VFS_FILE_NOT_FOUND; // NOWARN
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}
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return INFO::OK;
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}
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