Page MenuHomePhabricator (Chris)
Files F632892

directory.cpp
No OneTemporary
Actions

Authored By
Unknown
Size
4 KB
Referenced Files
None
Subscribers
None

directory.cpp
View Options

#include "file-system.h"
#include <string>
using std::string;
namespace Storage{
Directory::Directory(){
}
Directory::~Directory(){
}
/* Used to signal .. in a path */
class UpDirectory: public std::exception {
public:
UpDirectory(Path::AbsolutePath path):
path(path){
}
virtual ~UpDirectory() throw () {
}
Path::AbsolutePath path;
};
class Traverser{
public:
Traverser(){
}
virtual void traverseFile(Directory & directory, const string & file) = 0;
virtual void traverseDirectory(Directory & directory, const string & path) = 0;
virtual ~Traverser(){
}
};
void Directory::doTraverse(const Path::AbsolutePath & path, Traverser & traverser){
if (path.isFile()){
traverser.traverseFile(*this, path.path());
} else {
string name = path.firstDirectory();
if (name == "."){
try{
return doTraverse(path.removeFirstDirectory(), traverser);
} catch (const UpDirectory & up){
return doTraverse(up.path, traverser);
}
} else if (name == ".."){
throw UpDirectory(path.removeFirstDirectory());
}
traverser.traverseDirectory(*this, path.firstDirectory());
Util::ReferenceCount<Directory> directory = directories[path.firstDirectory()];
if (directory != NULL){
try{
return directory->doTraverse(path.removeFirstDirectory(), traverser);
} catch (const UpDirectory & up){
return doTraverse(up.path, traverser);
}
}
}
}
void Directory::traverse(const Path::AbsolutePath & path, Traverser & traverser){
Path::AbsolutePath use = path;
/* The path might contain .. paths that would go out of this directory
* so just ignore those paths and use the rest of the path.
*/
while (true){
try{
return doTraverse(use, traverser);
} catch (const UpDirectory & up){
use = up.path;
}
}
}
/*
Util::ReferenceCount<File> Directory::doLookup(const Path::AbsolutePath & path){
if (path.isFile()){
if (files[path.path()] != NULL){
return files[path.path()];
} else {
return Util::ReferenceCount<File>(NULL);
}
} else {
string name = path.firstDirectory();
if (name == "."){
try{
return doLookup(path.removeFirstDirectory());
} catch (const UpDirectory & up){
return doLookup(up.path);
}
} else if (name == ".."){
throw UpDirectory(path.removeFirstDirectory());
}
Util::ReferenceCount<Directory> directory = directories[path.firstDirectory()];
if (directory != NULL){
try{
return directory->doLookup(path.removeFirstDirectory());
} catch (const UpDirectory & up){
return doLookup(up.path);
}
}
}
return Util::ReferenceCount<File>(NULL);
}
*/
/* Might return NULL if the path can't be found */
Util::ReferenceCount<Descriptor> Directory::lookup(const Path::AbsolutePath & path){
class FindIt: public Traverser {
public:
virtual void traverseFile(Directory & directory, const string & file){
found = directory.files[file];
}
virtual void traverseDirectory(Directory & directory, const string & path){
}
Util::ReferenceCount<Descriptor> found;
};
FindIt find;
traverse(path, find);
return find.found;
#if 0
Path::AbsolutePath use = path;
/* The path might contain .. paths that would go out of this directory
* so just ignore those paths and use the rest of the path.
*/
while (true){
try{
return doLookup(use);
} catch (const UpDirectory & up){
use = up.path;
}
}
#endif
}
void Directory::addFile(const Path::AbsolutePath & path, const Util::ReferenceCount<Descriptor> & file){
class AddPath: public Traverser {
public:
AddPath(const Util::ReferenceCount<Descriptor> & file):
file(file){
}
const Util::ReferenceCount<Descriptor> & file;
virtual void traverseFile(Directory & directory, const string & path){
directory.files[path] = file;
}
virtual void traverseDirectory(Directory & directory, const string & path){
if (directory.directories[path] == NULL){
directory.directories[path] = Util::ReferenceCount<Directory>(new Directory());
}
}
};
AddPath adder(file);
traverse(path, adder);
}
void Directory::removeFile(const Path::AbsolutePath & path){
addFile(path, Util::ReferenceCount<Descriptor>(NULL));
}
}

File Metadata

Mime Type
text/x-c++
Expires
Sun, Nov 15, 3:33 PM (1 d, 21 h)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
152445
Default Alt Text
directory.cpp (4 KB)

Event Timeline