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#include "VFS.ns.h"
#include <VFS/FileNode.class.h>
#include <Vector.class.h>
FileSystem::~FileSystem() { delete m_rootNode; }
namespace VFS {
DirectoryNode *rootNode = 0;
Vector<FileSystem*> filesystems;
DirectoryNode* getRootNode() {
return rootNode;
}
void registerFilesystem(FileSystem* fs) {
unregisterFilesystem(fs);
filesystems.push(fs);
if (rootNode == 0) rootNode = fs->getRootNode();
}
void unregisterFilesystem(FileSystem* fs) {
for (u32int i = 0; i < filesystems.size(); i++) {
if (filesystems[i] == fs) {
filesystems[i] = filesystems.back();
filesystems.pop();
break;
}
}
}
bool unmount(FileSystem* fs) {
if (!fs->getRootNode()->unmountable()) return false;
if (fs->getRootNode() == rootNode) return false;
if (!fs->unmount()) return false;
delete fs; //Will automatically delete the root node (destructor is in this file);
return true;
}
FSNode* find(const String& path, FSNode* start) {
if (start == 0) start = rootNode;
Vector<String> p = path.split("/");
FSNode* node = start;
if (p[0].empty()) node = rootNode; //Empty first element means string starts with "/"
for (u32int i = 0; i < p.size(); i++) {
if (p[i] == "..") {
node = node->getParent();
} else if (!p[i].empty() and p[i] != ".") {
if (node->type() == NT_DIRECTORY) {
node = ((DirectoryNode*)node)->getChild(p[i]);
} else {
node = NULL;
}
}
if (node == NULL) return node;
}
return node;
}
FSNode* createFile(const String& path, FSNode* start, bool vrfyperm) {
if (find(path, start) != NULL) return NULL; //Something already has that name.
if (start == 0) start = rootNode;
Vector<String> p = path.split("/");
String name = p.back();
p.pop();
FSNode* node = start;
if (!path.empty()) {
if (p[0].empty()) node = rootNode;
for (u32int i = 0; i < p.size(); i++) {
if (p[i] == "..") {
node = node->getParent();
} else if (!p[i].empty() and p[i] != ".") {
if (node->type() == NT_DIRECTORY) {
node = ((DirectoryNode*)node)->getChild(p[i]);
} else {
node = NULL;
}
}
if (node == NULL) return node;
}
}
if (node->type() == NT_DIRECTORY) {
if ((vrfyperm && node->writable()) or !vrfyperm) return ((DirectoryNode*)node)->createFile(name);
}
return NULL;
}
FSNode* createDirectory(const String& path, FSNode* start, bool vrfyperm) {
if (find(path, start) != NULL) return NULL; //Something already has that name.
if (start == 0) start = rootNode;
Vector<String> p = path.split("/");
String name = p.back();
p.pop();
FSNode* node = start;
if (!path.empty()) {
if (p[0].empty()) node = rootNode;
for (u32int i = 0; i < p.size(); i++) {
if (p[i] == "..") {
node = node->getParent();
} else if (!p[i].empty() and p[i] != ".") {
if (node->type() == NT_DIRECTORY) {
node = ((DirectoryNode*)node)->getChild(p[i]);
} else {
node = NULL;
}
}
if (node == NULL) return node;
}
}
if (node->type() == NT_DIRECTORY) {
if ((vrfyperm && node->writable()) or !vrfyperm) return ((DirectoryNode*)node)->createDirectory(name);
}
return NULL;
}
bool remove(FSNode* node) {
FSNode* parent = node->getParent();
if (parent == NULL) return false;
if (parent->type() == NT_DIRECTORY) {
return ((DirectoryNode*)parent)->remove(node);
} else {
return false; //Something wierd happenned
}
}
bool remove(const String& path, FSNode* start) {
FSNode* node = find(path, start);
if (node == NULL) return false;
return remove(node);
}
String path(FSNode* node) {
String path;
while (node != NULL) {
String t = "/";
t += node->getName();
if (t != "//") {
t += path;
path = t;
}
node = node->getParent();
}
if (path.empty()) path = "/";
return path;
}
}
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