mirror of
https://github.com/cemu-project/Cemu.git
synced 2024-12-24 00:31:52 +01:00
FSC: Refactor FileTree and remove redundant path parser class
This commit is contained in:
Exzap
parent
b8462cec8b
commit
1ce629126a
@ -87,17 +87,14 @@ public:
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}
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// returns true if the node names match according to FSA case-insensitivity rules
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bool MatchNode(sint32 index, std::string_view name) const
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static bool MatchNodeName(std::string_view name1, std::string_view name2)
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{
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if (index < 0 || index >= (sint32)m_nodes.size())
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if (name1.size() != name2.size())
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return false;
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auto nodeName = GetNodeName(index);
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if (nodeName.size() != name.size())
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return false;
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for (size_t i = 0; i < nodeName.size(); i++)
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for (size_t i = 0; i < name1.size(); i++)
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{
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char c1 = nodeName[i];
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char c2 = name[i];
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char c1 = name1[i];
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char c2 = name2[i];
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if (c1 >= 'A' && c1 <= 'Z')
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c1 += ('a' - 'A');
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if (c2 >= 'A' && c2 <= 'Z')
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@ -107,191 +104,18 @@ public:
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}
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return true;
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}
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};
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class parsedPathW // todo - replaces this with FSCPath (using ascii/utf8 strings instead of wchar)
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{
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static const int MAX_NODES = 32;
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public:
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parsedPathW(std::wstring_view path)
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bool MatchNodeName(sint32 index, std::string_view name) const
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{
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// init vars
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this->numNodes = 0;
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// init parsed path data
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if (path.front() == '/')
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path.remove_prefix(1);
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pathData.assign(path.begin(), path.end());
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pathData.push_back('\0');
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// start parsing
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sint32 offset = 0;
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sint32 startOffset = 0;
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if (offset < pathData.size()-1)
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{
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this->nodeOffset[this->numNodes] = offset;
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this->numNodes++;
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}
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while (offset < pathData.size() - 1)
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{
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if (this->pathData[offset] == '/' || this->pathData[offset] == '\\')
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{
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this->pathData[offset] = '\0';
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offset++;
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// double slashes are ignored and instead are handled like a single slash
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if (this->pathData[offset] == '/' || this->pathData[offset] == '\\')
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{
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// if we're in the beginning and having a \\ it's a network path
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if (offset != 1)
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{
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this->pathData[offset] = '\0';
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offset++;
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}
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}
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// start new node
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if (this->numNodes < MAX_NODES)
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{
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if (offset < pathData.size() - 1)
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{
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this->nodeOffset[this->numNodes] = offset;
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this->numNodes++;
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}
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}
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continue;
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}
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offset++;
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}
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// handle special nodes like '.' or '..'
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sint32 nodeIndex = 0;
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while (nodeIndex < this->numNodes)
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{
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if (compareNodeName(nodeIndex, L".."))
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{
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assert(false);
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}
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else if (compareNodeName(nodeIndex, L"."))
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{
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removeNode(nodeIndex);
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continue;
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}
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nodeIndex++;
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}
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}
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// returns true if the names match (case sensitive)
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bool compareNodeName(sint32 index, std::wstring_view name)
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{
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if (index < 0 || index >= this->numNodes)
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if (index < 0 || index >= (sint32)m_nodes.size())
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return false;
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const wchar_t* nodeName = this->pathData.data() + this->nodeOffset[index];
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if (boost::iequals(nodeName, name))
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return true;
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return false;
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auto nodeName = GetNodeName(index);
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return MatchNodeName(nodeName, name);
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}
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static bool compareNodeName(std::wstring_view name1, std::wstring_view name2)
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{
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if (boost::iequals(name1, name2))
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return true;
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return false;
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}
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static bool compareNodeNameCaseInsensitive(std::wstring_view name1, std::wstring_view name2)
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{
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if (boost::iequals(name1, name2))
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return true;
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return false;
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}
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const wchar_t* getNodeName(sint32 index)
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{
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if (index < 0 || index >= this->numNodes)
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return nullptr;
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return this->pathData.data() + this->nodeOffset[index];
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}
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void removeNode(sint32 index)
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{
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if (index < 0 || index >= numNodes)
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return;
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numNodes--;
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for (sint32 i = 0; i < numNodes; i++)
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{
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nodeOffset[i] = nodeOffset[i + 1];
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}
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// remove empty space
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if (numNodes > 0)
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updateOffsets(nodeOffset[0]);
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}
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void prependNode(wchar_t* newNode)
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{
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if (numNodes >= MAX_NODES)
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return;
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sint32 len = (sint32)wcslen(newNode);
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updateOffsets(-(len + 1));
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numNodes++;
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for (sint32 i = numNodes - 1; i >= 1; i--)
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{
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nodeOffset[i] = nodeOffset[i - 1];
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}
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nodeOffset[0] = 0;
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memcpy(pathData.data() + 0, newNode, (len + 1) * sizeof(wchar_t));
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}
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void buildPathString(std::wstring& pathStr, bool appendSlash = false)
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{
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pathStr.resize(0);
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for (sint32 i = 0; i < numNodes; i++)
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{
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if (numNodes > 1)
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pathStr.append(L"/");
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pathStr.append(pathData.data() + nodeOffset[i]);
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}
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if(appendSlash)
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pathStr.append(L"/");
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}
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private:
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void updateOffsets(sint32 newBaseOffset)
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{
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if (numNodes == 0 || newBaseOffset == 0)
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return;
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cemu_assert_debug(newBaseOffset <= nodeOffset[0]);
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if (newBaseOffset > 0)
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{
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// decrease size
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memmove(pathData.data(), pathData.data() + newBaseOffset, (pathData.size() - newBaseOffset) * sizeof(wchar_t));
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pathData.resize(pathData.size() - newBaseOffset);
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// update node offsets
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for (sint32 i = 0; i < numNodes; i++)
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{
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nodeOffset[i] -= newBaseOffset;
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}
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}
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else
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{
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// increase size
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newBaseOffset = -newBaseOffset;
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pathData.resize(pathData.size() + newBaseOffset);
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memmove(pathData.data() + newBaseOffset, pathData.data(), (pathData.size() - newBaseOffset) * sizeof(wchar_t));
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// update node offsets
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for (sint32 i = 0; i < numNodes; i++)
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{
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nodeOffset[i] += newBaseOffset;
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}
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}
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}
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private:
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//std::wstring pathData;
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std::vector<wchar_t> pathData;
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sint32 nodeOffset[MAX_NODES + 1];
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public:
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sint32 numNodes;
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};
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template<typename F, bool isCaseSensitive>
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class FileTree
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template<typename F>
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class FSAFileTree
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{
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public:
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@ -303,27 +127,27 @@ private:
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NODETYPE_FILE,
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};
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typedef struct _node_t
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struct node_t
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{
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std::wstring name;
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std::vector<_node_t*> subnodes;
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std::string name;
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std::vector<node_t*> subnodes;
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F* custom;
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NODETYPE type;
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}node_t;
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};
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node_t* getByNodePath(parsedPathW& p, sint32 numNodes, bool createAsDirectories)
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node_t* getByNodePath(FSCPath& p, sint32 numNodes, bool createAsDirectories)
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{
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node_t* currentNode = &rootNode;
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for (sint32 i = 0; i < numNodes; i++)
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{
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// find subnode by path
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node_t* foundSubnode = getSubnode(currentNode, p.getNodeName(i));
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node_t* foundSubnode = getSubnode(currentNode, p.GetNodeName(i));
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if (foundSubnode == nullptr)
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{
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// no subnode found -> create new directory node (if requested)
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if (createAsDirectories == false)
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return nullptr; // path not found
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currentNode = newNode(currentNode, NODETYPE_DIRECTORY, p.getNodeName(i));
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currentNode = newNode(currentNode, NODETYPE_DIRECTORY, p.GetNodeName(i));
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}
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else
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{
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@ -333,28 +157,20 @@ private:
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return currentNode;
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}
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node_t* getSubnode(node_t* parentNode, std::wstring_view name)
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node_t* getSubnode(node_t* parentNode, std::string_view name)
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{
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for (auto& sn : parentNode->subnodes)
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{
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if constexpr (isCaseSensitive)
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{
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if (parsedPathW::compareNodeName(sn->name.c_str(), name))
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return sn;
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}
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else
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{
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if (parsedPathW::compareNodeNameCaseInsensitive(sn->name.c_str(), name))
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return sn;
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}
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if (FSCPath::MatchNodeName(sn->name, name))
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return sn;
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}
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return nullptr;
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}
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node_t* newNode(node_t* parentNode, NODETYPE type, std::wstring_view name)
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node_t* newNode(node_t* parentNode, NODETYPE type, std::string_view name)
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{
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node_t* newNode = new node_t;
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newNode->name = std::wstring(name);
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newNode->name.assign(name);
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newNode->type = type;
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newNode->custom = nullptr;
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parentNode->subnodes.push_back(newNode);
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@ -362,32 +178,32 @@ private:
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}
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public:
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FileTree()
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FSAFileTree()
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{
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rootNode.type = NODETYPE_DIRECTORY;
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}
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bool addFile(const wchar_t* path, F* custom)
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bool addFile(std::string_view path, F* custom)
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{
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parsedPathW p(path);
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if (p.numNodes == 0)
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FSCPath p(path);
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if (p.GetNodeCount() == 0)
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return false;
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node_t* directoryNode = getByNodePath(p, p.numNodes - 1, true);
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node_t* directoryNode = getByNodePath(p, p.GetNodeCount() - 1, true);
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// check if a node with same name already exists
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if (getSubnode(directoryNode, p.getNodeName(p.numNodes - 1)) != nullptr)
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if (getSubnode(directoryNode, p.GetNodeName(p.GetNodeCount() - 1)) != nullptr)
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return false; // node already exists
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// add file node
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node_t* fileNode = newNode(directoryNode, NODETYPE_FILE, p.getNodeName(p.numNodes - 1));
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node_t* fileNode = newNode(directoryNode, NODETYPE_FILE, p.GetNodeName(p.GetNodeCount() - 1));
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fileNode->custom = custom;
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return true;
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}
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bool getFile(std::wstring_view path, F* &custom)
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bool getFile(std::string_view path, F* &custom)
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{
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parsedPathW p(path);
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if (p.numNodes == 0)
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FSCPath p(path);
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if (p.GetNodeCount() == 0)
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return false;
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node_t* node = getByNodePath(p, p.numNodes, false);
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node_t* node = getByNodePath(p, p.GetNodeCount(), false);
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if (node == nullptr)
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return false;
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if (node->type != NODETYPE_FILE)
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@ -396,16 +212,16 @@ public:
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return true;
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}
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bool removeFile(std::wstring_view path)
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bool removeFile(std::string_view path)
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{
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parsedPathW p(path);
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if (p.numNodes == 0)
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FSCPath p(path);
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if (p.GetNodeCount() == 0)
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return false;
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node_t* directoryNode = getByNodePath(p, p.numNodes - 1, false);
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node_t* directoryNode = getByNodePath(p, p.GetNodeCount() - 1, false);
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if (directoryNode == nullptr)
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return false;
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// find node
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node_t* fileNode = getSubnode(directoryNode, p.getNodeName(p.numNodes - 1));
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node_t* fileNode = getSubnode(directoryNode, p.GetNodeName(p.GetNodeCount() - 1));
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if (fileNode == nullptr)
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return false;
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if (fileNode->type != NODETYPE_FILE)
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@ -423,10 +239,10 @@ public:
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}
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template<typename TFunc>
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bool listDirectory(const wchar_t* path, TFunc fn)
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bool listDirectory(std::string_view path, TFunc fn)
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{
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parsedPathW p(path);
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node_t* node = getByNodePath(p, p.numNodes, false);
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FSCPath p(path);
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node_t* node = getByNodePath(p, p.GetNodeCount(), false);
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if (node == nullptr)
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return false;
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if (node->type != NODETYPE_DIRECTORY)
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@ -454,28 +270,28 @@ static void FSTPathUnitTest()
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// test 1
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FSCPath p1("/vol/content");
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cemu_assert_debug(p1.GetNodeCount() == 2);
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cemu_assert_debug(p1.MatchNode(0, "tst") == false);
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cemu_assert_debug(p1.MatchNode(0, "vol"));
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cemu_assert_debug(p1.MatchNode(1, "CONTENT"));
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cemu_assert_debug(p1.MatchNodeName(0, "tst") == false);
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cemu_assert_debug(p1.MatchNodeName(0, "vol"));
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cemu_assert_debug(p1.MatchNodeName(1, "CONTENT"));
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// test 2
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FSCPath p2("/vol/content/");
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cemu_assert_debug(p2.GetNodeCount() == 2);
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cemu_assert_debug(p2.MatchNode(0, "vol"));
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cemu_assert_debug(p2.MatchNode(1, "content"));
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cemu_assert_debug(p2.MatchNodeName(0, "vol"));
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cemu_assert_debug(p2.MatchNodeName(1, "content"));
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// test 3
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FSCPath p3("/vol//content/\\/");
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cemu_assert_debug(p3.GetNodeCount() == 2);
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cemu_assert_debug(p3.MatchNode(0, "vol"));
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cemu_assert_debug(p3.MatchNode(1, "content"));
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cemu_assert_debug(p3.MatchNodeName(0, "vol"));
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cemu_assert_debug(p3.MatchNodeName(1, "content"));
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// test 4
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FSCPath p4("vol/content/");
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cemu_assert_debug(p4.GetNodeCount() == 2);
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// test 5
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FSCPath p5("/vol/content/test.bin");
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cemu_assert_debug(p5.GetNodeCount() == 3);
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cemu_assert_debug(p5.MatchNode(0, "vol"));
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cemu_assert_debug(p5.MatchNode(1, "content"));
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cemu_assert_debug(p5.MatchNode(2, "TEST.BIN"));
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cemu_assert_debug(p5.MatchNodeName(0, "vol"));
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cemu_assert_debug(p5.MatchNodeName(1, "content"));
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cemu_assert_debug(p5.MatchNodeName(2, "TEST.BIN"));
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// test 6 - empty paths
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FSCPath p6("");
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cemu_assert_debug(p6.GetNodeCount() == 0);
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@ -86,7 +86,7 @@ FSCMountPathNode* fsc_createMountPath(const FSCPath& mountPath, sint32 priority)
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FSCMountPathNode* nodeSub = nullptr; // set if we found a subnode with a matching name, else this is used to store the new nodes
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for (auto& nodeItr : nodeParent->subnodes)
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{
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if (mountPath.MatchNode(i, nodeItr->path))
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if (mountPath.MatchNodeName(i, nodeItr->path))
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{
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// subnode found
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nodeSub = nodeItr;
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@ -195,7 +195,7 @@ bool fsc_lookupPath(const char* path, std::wstring& devicePathOut, fscDeviceC**
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FSCMountPathNode* nodeSub = nullptr;
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for(auto& nodeItr : nodeParent->subnodes)
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{
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if (parsedPath.MatchNode(i, nodeItr->path))
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if (parsedPath.MatchNodeName(i, nodeItr->path))
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{
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nodeSub = nodeItr;
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break;
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@ -246,7 +246,7 @@ FSCMountPathNode* fsc_lookupPathVirtualNode(const char* path, sint32 priority)
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FSCMountPathNode* nodeSub = nullptr;
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for (auto& nodeItr : nodeCurrentDir->subnodes)
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{
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if (parsedPath.MatchNode(i, nodeItr->path))
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if (parsedPath.MatchNodeName(i, nodeItr->path))
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{
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nodeSub = nodeItr;
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break;
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@ -9,23 +9,22 @@ struct RedirectEntry
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sint32 priority;
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};
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FileTree<RedirectEntry, false> redirectTree;
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FSAFileTree<RedirectEntry> redirectTree;
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void fscDeviceRedirect_add(std::string_view virtualSourcePath, const fs::path& targetFilePath, sint32 priority)
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{
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std::wstring virtualSourcePathW = boost::nowide::widen(std::string(virtualSourcePath));
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// check if source already has a redirection
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RedirectEntry* existingEntry;
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if (redirectTree.getFile(virtualSourcePathW, existingEntry))
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if (redirectTree.getFile(virtualSourcePath, existingEntry))
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{
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if (existingEntry->priority >= priority)
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return; // dont replace entries with equal or higher priority
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||||
// unregister existing entry
|
||||
redirectTree.removeFile(virtualSourcePathW.c_str());
|
||||
redirectTree.removeFile(virtualSourcePath);
|
||||
delete existingEntry;
|
||||
}
|
||||
RedirectEntry* entry = new RedirectEntry(targetFilePath, priority);
|
||||
redirectTree.addFile(virtualSourcePathW.c_str(), entry);
|
||||
redirectTree.addFile(virtualSourcePath, entry);
|
||||
}
|
||||
|
||||
class fscDeviceTypeRedirect : public fscDeviceC
|
||||
@ -33,7 +32,8 @@ class fscDeviceTypeRedirect : public fscDeviceC
|
||||
FSCVirtualFile* fscDeviceOpenByPath(std::wstring_view pathW, FSC_ACCESS_FLAG accessFlags, void* ctx, sint32* fscStatus) override
|
||||
{
|
||||
RedirectEntry* redirectionEntry;
|
||||
if (redirectTree.getFile(pathW, redirectionEntry))
|
||||
std::string pathTmp = boost::nowide::narrow(pathW);
|
||||
if (redirectTree.getFile(pathTmp, redirectionEntry))
|
||||
return FSCVirtualFile_Host::OpenFile(redirectionEntry->dstPath, accessFlags, *fscStatus);
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user