Tokenizer Initial
This commit is contained in:
IlushaShurupov
Ilya Shurupov
parent
0ec44ee2d1
commit
1310bb78ad
11 changed files with 1848 additions and 3 deletions
510
Tokenizer/public/AutomataGraph.h
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510
Tokenizer/public/AutomataGraph.h
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#pragma once
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#include "List.hpp"
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#include "Buffer.hpp"
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#include "Buffer2D.hpp"
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#include "Mat.hpp"
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#include "Map.hpp"
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namespace tp {
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template <typename tAlphabetType, typename tStateType, tStateType tNoStateVal, tStateType tFailedStateVal>
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class TransitionMatrix;
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template <typename tAlphabetType, typename tStateType, tStateType tNoStateVal, tStateType tFailedStateVal>
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class DFA;
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// Non-Deterministic Finite-State Automata
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template <typename tAlphabetType, typename tStateType, tStateType tNoStateVal, tStateType tFailedStateVal>
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class NFA {
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static_assert(TypeTraits<tAlphabetType>::isIntegral, "tAlphabetType must be enumerable.");
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public:
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struct Vertex;
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private:
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struct Edge {
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Vertex* mVertex = nullptr;
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bool mConsumesSymbol = false;
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Range<tAlphabetType> mAcceptingRange;
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bool mAcceptsAll = false;
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bool mExclude = false;
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bool isTransition(const tAlphabetType& symbol) {
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if (symbol == nullptr) return false;
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if (!mConsumesSymbol || mAcceptsAll) return true;
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bool const in_range = (symbol >= mAcceptingRange.mBegin && symbol <= mAcceptingRange.mEnd);
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return in_range != mExclude;
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}
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};
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public:
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struct Vertex {
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List<Edge> edges;
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tStateType termination_state = tNoStateVal;
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#ifdef ENV_BUILD_DEBUG
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ualni debug_idx = 0;
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#endif
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ualni flag = 0;
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};
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private:
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friend DFA<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal>;
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List<Vertex> mVertices;
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Vertex* mStart = nullptr;
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public:
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NFA() = default;
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Vertex* addVertex() {
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auto node = mVertices.newNode();
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#ifdef ENV_BUILD_DEBUG
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node->data.debug_idx = mVertices.length() + 1;
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#endif
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mVertices.pushBack(node);
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return &node->data;
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}
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void addTransition(Vertex* from, Vertex* to, Range<tAlphabetType> range, bool consumes, bool accepts_all, bool exclude) {
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Edge edge;
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edge.mVertex = to;
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edge.mConsumesSymbol = consumes;
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edge.mAcceptingRange = range;
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edge.mExclude = exclude;
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edge.mAcceptsAll = accepts_all;
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from->edges.pushBack(edge);
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}
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void setStartVertex(Vertex* start) {
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mStart = start;
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}
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[[nodiscard]] Vertex* getStartVertex() const {
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return mStart;
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}
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void setVertexState(Vertex* vertex, tStateType state) {
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vertex->termination_state = state;
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}
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[[nodiscard]] bool isValid() const {
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if (!mStart) {
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return false;
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}
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return true;
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}
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Range<tAlphabetType> getAlphabetRange() const {
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tAlphabetType start = 0, end = 0;
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Range<tAlphabetType> all_range = { std::numeric_limits<tAlphabetType>::min(), std::numeric_limits<tAlphabetType>::max() };
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bool first = true;
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for (auto vertex : mVertices) {
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for (auto edge : vertex.data().edges) {
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if (!edge.data().mConsumesSymbol) continue;
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auto const& tran_range = edge.data().mAcceptingRange;
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if (edge.data().mAcceptsAll || edge.data().mExclude) return all_range;
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if (tran_range.mBegin < start || first) start = tran_range.mBegin;
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if (tran_range.mEnd > end || first) end = tran_range.mEnd;
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first = false;
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}
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}
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return { start, end + 1 };
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}
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// vertices that are reachable from initial set with no input consumption (E-transitions)
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// does not include initial set
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void closure(const List<Vertex*>& set, List<Vertex*>& closure, ualni unique_call_id) {
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List<Vertex*> marked;
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marked = set;
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while (marked.length()) {
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auto first = marked.first()->data;
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if (first->flag != unique_call_id) {
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first->flag = unique_call_id;
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closure.pushBack(first);
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}
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for (auto edge : first->edges) {
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if (!edge.data().mConsumesSymbol && edge.data().mVertex->flag != unique_call_id) {
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marked.pushBack(edge.data().mVertex);
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}
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}
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marked.popFront();
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}
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}
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// vertices that are reachable from initial set with symbol transition
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void move(const List<Vertex*>& set, List<Vertex*>& reachable, tAlphabetType symbol, ualni unique_call_id) {
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for (auto vertex : set) {
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for (auto edge : vertex->edges) {
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if (!edge.data().mConsumesSymbol) continue;
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bool transition = edge.data().isTransition(symbol);
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if (transition && edge.data().mVertex->flag != unique_call_id) {
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edge.data().mVertex->flag = unique_call_id;
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reachable.pushBack(edge.data().mVertex);
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}
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}
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}
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}
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};
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// Deterministic Finite-State Automata
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template <typename tAlphabetType, typename tStateType, tStateType tNoStateVal, tStateType tFailedStateVal>
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class DFA {
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static_assert(TypeTraits<tAlphabetType>::isIntegral, "tAlphabetType must be enumerable.");
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friend TransitionMatrix<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal>;
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struct Vertex {
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struct Edge {
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Vertex* vertex = nullptr;
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tAlphabetType transition_code = nullptr;
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};
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List<Edge> edges;
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tStateType termination_state = tNoStateVal;
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bool marked = false;
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};
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List<Vertex> mVertices;
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Vertex* mStart = nullptr;
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const Vertex* mIter = nullptr;
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Range<tAlphabetType> mAlphabetRange;
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bool mTrapState = false;
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typedef typename NFA<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal>::Vertex NState;
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public:
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explicit DFA(NFA<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal>& nfa) {
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if (!nfa.isValid()) {
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return;
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}
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mAlphabetRange = nfa.getAlphabetRange();
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struct DStateKey {
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const List<NState*>* nStates;
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bool operator==(const DStateKey& in) {
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if (nStates->length() != in.nStates->length()) {
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return false;
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}
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// FIXME : make linear time
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for (auto state : *nStates) {
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bool found = false;
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for (auto in_state : *in.nStates) {
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if (state.data() == in_state.data()) {
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found = true;
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break;
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}
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}
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if (!found) {
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return false;
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}
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}
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return true;
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}
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static ualni dStateHashFunc(DStateKey key) {
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alni out = 0;
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for (auto state : *key.nStates) {
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out += alni(state.data());
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}
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return out;
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};
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};
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// all NFA states that are reachable from initial DFA State for specific symbol in alphabet
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struct DState {
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struct DTransition {
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DState* state = nullptr;
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tAlphabetType accepting_code;
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};
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List<NState*> nStates;
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List<DTransition> transitions;
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Vertex* dVertex = nullptr; // relevant DFA vertex
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#ifdef ENV_BUILD_DEBUG
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ualni debug_idx = 0;
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#endif
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};
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// includes closure of NFA start state by definition
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auto start_state = new DState();
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nfa.closure({ nfa.getStartVertex() }, start_state->nstates, ualni(start_state));
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Map<DStateKey, DState*, DefaultAllocator, DStateKey::dStateHashFunc, 256> dStates;
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dStates.put({ &start_state->nstates }, start_state);
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List<DState*> working_set = { start_state };
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// while there is items to work with
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auto currentDState = working_set.first();
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while (currentDState) {
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// check all possible transitions for any symbol
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for (auto symbol : mAlphabetRange) {
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List<NState*> reachableNStates;
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nfa.move(currentDState->data->nstates, reachableNStates, symbol, ualni(currentDState + symbol));
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nfa.closure(reachableNStates, reachableNStates, ualni(currentDState + symbol));
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if (!reachableNStates.length()) {
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continue;
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}
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DState* targetDState = nullptr;
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// check if set of all reachable NFA states already forms existing DFA state
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auto idx = dStates.presents({ &reachableNStates});
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if (idx) {
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targetDState = dStates.getSlotVal(idx);
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}
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if (!targetDState) {
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// register new DFA state
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targetDState = new DState();
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#ifdef ENV_BUILD_DEBUG
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targetDState->debug_idx = dStates.size();
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#endif
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targetDState->nstates = reachableNStates;
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// append to working stack
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working_set.pushBack(targetDState);
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dStates.put({ &targetDState->nstates }, targetDState);
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}
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// add transition to DFA state
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currentDState->data->transitions.pushBack({targetDState, symbol });
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}
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working_set.popFront();
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currentDState = working_set.first();
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}
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// create own vertices
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for (auto node : dStates) {
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tStateType state = tNoStateVal;
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for (auto iter : node->val->nStates) {
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if (iter->termination_state != tNoStateVal) {
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state = iter->termination_state;
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break;
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}
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}
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node->val->dvertex = addVertex(state);
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}
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// connect all vertices
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for (auto node : dStates) {
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for (auto edge : node->val->transitions) {
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addTransition(node->val->dvertex, edge.data().state->dvertex, edge.data().accepting_code);
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}
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}
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// set the starting vertex
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mStart = start_state->dvertex;
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// cleanup
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for (auto node : dStates) {
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delete node->val;
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}
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collapseEquivalentVertices();
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mAlphabetRange = getAlphabetRange();
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}
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tStateType move(tAlphabetType symbol) {
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if (mTrapState || !mIter) {
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return tNoStateVal;
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}
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for (auto edge : mIter->edges) {
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if (edge.data().transition_code == symbol) {
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mIter = edge.data().vertex;
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return mIter->termination_state;
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}
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}
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mTrapState = true;
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return tNoStateVal;
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}
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void start() {
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mIter = mStart;
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mTrapState = false;
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}
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[[nodiscard]] uhalni nVertices() const {
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return (uhalni) mVertices.length();
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}
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[[nodiscard]] Range<tAlphabetType> getRange() const {
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return mAlphabetRange;
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}
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private:
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[[nodiscard]] Range<tAlphabetType> getAlphabetRange() const {
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Range<tAlphabetType> out;
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for (auto vertex : mVertices) {
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vertex.data().marked = false;
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}
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bool first = true;
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getAlphabetRangeUtil(mStart, &out, first);
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out.mEnd++;
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return out;
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}
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void getAlphabetRangeUtil(Vertex* vert, Range<tAlphabetType>* out, bool& first) const {
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vert->marked = true;
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for (auto edge : vert->edges) {
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auto const code = edge.data().transition_code;
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if (first) {
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*out = { code, code };
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first = false;
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}
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if (code < out->mBegin) {
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out->mBegin = code;
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}
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if (code > out->mEnd) {
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out->mEnd = code;
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}
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if (!edge.data().vertex->marked) {
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getAlphabetRangeUtil(edge.data().vertex, out, first);
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}
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}
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}
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void collapseEquivalentVertices() {
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// TODO
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}
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Vertex* addVertex(tStateType state) {
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auto node = mVertices.addNodeBack();
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node->data.termination_state = state;
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return &node->data;
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}
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void addTransition(Vertex* from, Vertex* to, tAlphabetType transition_symbol) {
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from->edges.pushBack({ to, transition_symbol });
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}
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};
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template <typename tAlphabetType, typename tStateType, tStateType tNoStateVal, tStateType tFailedStateVal>
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class TransitionMatrix {
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static_assert(TypeTraits<tAlphabetType>::isIntegral, "tAlphabetType must be enumerable.");
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Buffer2D<ualni> mTransitions{};
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Buffer<tStateType> mStates{};
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Range<tAlphabetType> mSymbolRange = nullptr;
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ualni mIter = 0;
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ualni mIterPrev = 0;
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ualni mStart = 0;
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public:
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TransitionMatrix() = default;
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void construct(const DFA<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal>& dfa) {
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mSymbolRange = dfa.getRange();
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auto range_len = uhalni(mSymbolRange.mEnd - mSymbolRange.mBegin);
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Vec2<uhalni> dim = { range_len ? range_len : 1, (uhalni) (dfa.nVertices() + 1) };
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mTransitions.reserve(dim);
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mTransitions.assign(dfa.nVertices());
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mStates.reserve(dim.y);
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for (auto vertex : dfa.mVertices) {
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auto state = vertex.data().termination_state;
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mStates[vertex.idx()] = state;
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}
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mStates[dfa.nVertices()] = tFailedStateVal;
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for (auto vertex : dfa.mVertices) {
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if (&vertex.data() == dfa.mStart) {
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mStart = mIter = mIterPrev = vertex.idx();
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}
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}
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for (auto vertex : dfa.mVertices) {
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for (auto edge : vertex.data().edges) {
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ualni idx = 0;
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for (auto vertex : dfa.mVertices) {
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if (edge.data().vertex == &vertex.data()) {
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idx = vertex.idx();
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break;
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}
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}
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auto const code = edge.data().transition_code;
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mTransitions.set(code - mSymbolRange.mBegin, (uhalni) vertex.idx(), idx);
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}
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}
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}
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bool isTrapped() {
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return mStates[mIter] == tFailedStateVal;
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}
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tStateType move(tAlphabetType symbol) {
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if (symbol >= mSymbolRange.mBegin && symbol < mSymbolRange.mEnd) {
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mIter = mTransitions.get((uhalni) (symbol - mSymbolRange.mBegin), (uhalni) mIter);
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}
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else {
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mIter = mStates.length() - 1;
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}
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if (mIterPrev == mStart) {
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if (mStates[mIter] == tFailedStateVal) {
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reset();
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return tFailedStateVal;
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}
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else {
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mIterPrev = mIter;
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return tNoStateVal;
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}
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}
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else {
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if (mStates[mIter] == tFailedStateVal) {
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if (mStates[mIterPrev] != tNoStateVal) {
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auto out = mStates[mIterPrev];
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reset();
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return out;
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}
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else {
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reset();
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return tFailedStateVal;
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}
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}
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else {
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mIterPrev = mIter;
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return tNoStateVal;
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}
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}
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mIterPrev = mIter;
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return mStates[mIter];
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}
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void reset() {
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mIter = mStart;
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mIterPrev = mStart;
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}
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};
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}
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97
Tokenizer/public/CmdArgParser.h
Normal file
97
Tokenizer/public/CmdArgParser.h
Normal file
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@ -0,0 +1,97 @@
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#pragma once
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#include "Tokenizer.hpp"
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namespace tp {
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struct CmdArgParser {
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struct IntArg {
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alni mVal = 0;
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alni mDefault = 0;
|
||||
Range<alni> mAcceptingRange = { ENV_ALNI_MIN, ENV_ALNI_MAX };
|
||||
};
|
||||
|
||||
struct FloatArg {
|
||||
alnf mVal = 0.f;
|
||||
alnf mDefault = 0.f;
|
||||
Range<alnf> mAcceptingRange = { ENV_ALNF_MIN, ENV_ALNF_MAX };
|
||||
};
|
||||
|
||||
struct BoolArg {
|
||||
bool mFlag = false;
|
||||
bool mDefault = false;
|
||||
};
|
||||
|
||||
struct StringArg {
|
||||
String mStr;
|
||||
String mDefault;
|
||||
};
|
||||
|
||||
struct FileInputArg {
|
||||
String mFilepath;
|
||||
File mFile;
|
||||
};
|
||||
|
||||
struct Arg {
|
||||
string mId;
|
||||
enum Type { INT, FLOAT, BOOL, STR, FILE_IN } mType;
|
||||
union {
|
||||
IntArg mInt;
|
||||
FloatArg mFloat;
|
||||
BoolArg mBool;
|
||||
StringArg mStr;
|
||||
FileInputArg mFile;
|
||||
};
|
||||
|
||||
bool mOptional = true;
|
||||
|
||||
Arg(const Arg& arg);
|
||||
Arg(string id, Type type);
|
||||
Arg(string id, Range<alni> aAcceptingRange);
|
||||
Arg(string id, Range<alnf> aAcceptingRange);
|
||||
Arg(string id, Range<alni> aAcceptingRange, alni aDefault);
|
||||
Arg(string id, Range<alnf> aAcceptingRange, alnf aDefault);
|
||||
Arg(string id, bool aDefault);
|
||||
Arg(string id, const char* aDefault);
|
||||
~Arg();
|
||||
};
|
||||
|
||||
struct Error {
|
||||
const char* mDescr = nullptr;
|
||||
Arg* mArg = nullptr;
|
||||
operator bool() { return mDescr != nullptr; }
|
||||
} mError;
|
||||
|
||||
CmdArgParser(init_list<Arg> args);
|
||||
~CmdArgParser();
|
||||
|
||||
bool parse(char argc, const char* argv[], bool logError = false);
|
||||
|
||||
alni getInt(string id);
|
||||
alnf getFloat(string id);
|
||||
bool getBool(string id);
|
||||
string getString(string id);
|
||||
File& getFile(string id);
|
||||
|
||||
private:
|
||||
enum class TokType { SPACE, INT, FLOAT, BOOL_FALSE, BOOL_TRUE, STR, NONE, FAILURE, END, } mType;
|
||||
typedef SimpleTokenizer<char, TokType, TokType::NONE, TokType::FAILURE, TokType::END> Tokenizer;
|
||||
|
||||
Tokenizer mTokenizer;
|
||||
HashMap<Arg*, string> mArgs;
|
||||
List<Arg*> mArgsOrder;
|
||||
ualni mOptionals = 0;
|
||||
|
||||
Arg& getArg(string id, Arg::Type type);
|
||||
void ErrInvalidArgCount();
|
||||
void ErrInvalidArgSyntax(Arg* arg);
|
||||
void ErrInvalidArgType(Arg* arg);
|
||||
void ErrFileNotExists(Arg* arg);
|
||||
void ErrFileCouldNotOpen(Arg* arg);
|
||||
void ErrValNotinRange(Arg* arg);
|
||||
void ErrLog();
|
||||
void ArgLog(Arg& arg);
|
||||
void initDefault(Arg& arg);
|
||||
void parseArg(Arg& arg, const char* src);
|
||||
};
|
||||
};
|
||||
498
Tokenizer/public/RegularExpression.h
Normal file
498
Tokenizer/public/RegularExpression.h
Normal file
|
|
@ -0,0 +1,498 @@
|
|||
|
||||
#pragma once
|
||||
|
||||
#include "AutomataGraph.h"
|
||||
|
||||
namespace tp::RegEx {
|
||||
|
||||
struct AstNode {
|
||||
enum Type {
|
||||
NONE,
|
||||
ANY,
|
||||
OR,
|
||||
IF,
|
||||
CLASS,
|
||||
COMPOUND,
|
||||
REPEAT,
|
||||
VAL,
|
||||
} mType = NONE;
|
||||
};
|
||||
|
||||
template <typename tAlphabetType>
|
||||
struct AstVal : public AstNode {
|
||||
explicit AstVal(tAlphabetType val) : mVal(val) { mType = VAL; }
|
||||
tAlphabetType mVal;
|
||||
};
|
||||
|
||||
struct AstCompound : public AstNode {
|
||||
AstCompound() { mType = COMPOUND; }
|
||||
List<AstNode*> mChilds;
|
||||
};
|
||||
|
||||
struct AstAlternation : public AstNode {
|
||||
AstAlternation() { mType = OR; }
|
||||
AstNode* mFirst = nullptr;
|
||||
AstNode* mSecond = nullptr;
|
||||
};
|
||||
|
||||
struct AstIf : public AstNode {
|
||||
AstIf() { mType = IF; }
|
||||
AstNode* mNode = nullptr;
|
||||
};
|
||||
|
||||
struct AstAny : public AstNode {
|
||||
AstAny() { mType = ANY; }
|
||||
};
|
||||
|
||||
struct AstRepetition : public AstNode {
|
||||
AstRepetition() { mType = REPEAT; }
|
||||
AstNode* mNode = nullptr;
|
||||
bool mPlus = false;
|
||||
};
|
||||
|
||||
template <typename tAlphabetType>
|
||||
struct AstClass : public AstNode {
|
||||
AstClass() { mType = CLASS; }
|
||||
List<Range<tAlphabetType>> mRanges;
|
||||
bool mExclude{};
|
||||
};
|
||||
|
||||
struct ParseError {
|
||||
const char* description = nullptr;
|
||||
uhalni offset = 0;
|
||||
[[nodiscard]] bool isError() const { return description != nullptr; }
|
||||
};
|
||||
|
||||
template <typename tAlphabetType, typename tStateType, tStateType tNoStateVal>
|
||||
class Parser {
|
||||
|
||||
enum TokType : uint1 {
|
||||
TOK_COMPOUND_START = 0,
|
||||
TOK_COMPOUND_END,
|
||||
TOK_CLASS_START,
|
||||
TOK_CLASS_END,
|
||||
TOK_CLASS_START_EXCLUDE,
|
||||
TOK_CLASS_END_EXCLUDE,
|
||||
TOK_OR,
|
||||
TOK_IF,
|
||||
TOK_ANY,
|
||||
TOK_REPEAT,
|
||||
TOK_REPEAT_PLUS,
|
||||
TOK_HYPHEN,
|
||||
TOK_SPECIALS_END_,
|
||||
TOK_VAL,
|
||||
TOK_NONE,
|
||||
};
|
||||
|
||||
tAlphabetType SpecialSymbols[TOK_SPECIALS_END_] = {
|
||||
'(', ')', '[', ']', '{', '}', '|', '?', '.', '*', '+', '-',
|
||||
};
|
||||
|
||||
tAlphabetType mEscapeSymbol = '\\';
|
||||
|
||||
struct Token {
|
||||
TokType type;
|
||||
tAlphabetType val;
|
||||
};
|
||||
|
||||
const tAlphabetType* mSource = nullptr;
|
||||
uhalni mOffset = 0;
|
||||
Token mCurToken;
|
||||
uhalni mTokLength = 0;
|
||||
|
||||
public:
|
||||
|
||||
ParseError mError;
|
||||
|
||||
// regular expression must be a zero termination string
|
||||
AstCompound* parse(const tAlphabetType* regex) {
|
||||
mSource = regex;
|
||||
return parseRegEx();
|
||||
}
|
||||
|
||||
private:
|
||||
|
||||
AstCompound* parseRegEx() {
|
||||
auto out = new AstCompound();
|
||||
for (AstNode* node = parseElement(); node; node = parseElement()) {
|
||||
out->mChilds.pushBack(node);
|
||||
}
|
||||
if (!out->mChilds.length()) {
|
||||
genError("Expected A Expression");
|
||||
}
|
||||
if (mError.description) {
|
||||
delete out;
|
||||
return nullptr;
|
||||
}
|
||||
return out;
|
||||
}
|
||||
|
||||
AstNode* parseElement() {
|
||||
AstNode* out = nullptr;
|
||||
switch (readTok().type) {
|
||||
case TOK_COMPOUND_START: out = parseCompound(); break;
|
||||
case TOK_CLASS_START: out = parseClass(); break;
|
||||
case TOK_CLASS_START_EXCLUDE: out = parseClass(true); break;
|
||||
case TOK_ANY: out = parseAny(); break;
|
||||
case TOK_VAL: out = parseVal(); break;
|
||||
case TOK_NONE: { discardTok(); return nullptr; };
|
||||
}
|
||||
if (!out) {
|
||||
discardTok();
|
||||
return nullptr;
|
||||
}
|
||||
switch (readTok().type) {
|
||||
case TOK_OR: out = parseAlternation(out); break;
|
||||
case TOK_REPEAT: out = parseRepetition(out); break;
|
||||
case TOK_REPEAT_PLUS: out = parseRepetition(out, true); break;
|
||||
case TOK_IF: out = parseIf(out); break;
|
||||
case TOK_NONE: break;
|
||||
default: { discardTok(); }
|
||||
}
|
||||
return out;
|
||||
}
|
||||
|
||||
AstCompound* parseCompound() {
|
||||
auto out = new AstCompound();
|
||||
for (AstNode* node = parseElement(); node; node = parseElement()) {
|
||||
out->mChilds.pushBack(node);
|
||||
}
|
||||
if (readTok().type != TOK_COMPOUND_END) {
|
||||
genError("Expected Compound End");
|
||||
}
|
||||
if (mError.description) {
|
||||
delete out;
|
||||
return nullptr;
|
||||
}
|
||||
return out;
|
||||
}
|
||||
|
||||
AstClass<tAlphabetType>* parseClass(bool exclude = false) {
|
||||
auto out = new AstClass<tAlphabetType>();
|
||||
out->mExclude = exclude;
|
||||
auto& ranges = out->mRanges;
|
||||
|
||||
readTok();
|
||||
|
||||
READ_VAL:
|
||||
if (mCurToken.type != TOK_VAL) {
|
||||
delete out;
|
||||
genError("Expected A Value");
|
||||
return nullptr;
|
||||
}
|
||||
char range_start = mCurToken.val;
|
||||
|
||||
readTok();
|
||||
if (mCurToken.type != TOK_HYPHEN) {
|
||||
delete out;
|
||||
genError("Expected A Range");
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
readTok();
|
||||
if (mCurToken.type != TOK_VAL) {
|
||||
delete out;
|
||||
genError("Expected A Value");
|
||||
return nullptr;
|
||||
}
|
||||
char range_end = mCurToken.val;
|
||||
|
||||
ranges.pushBack({ range_start, range_end });
|
||||
|
||||
readTok();
|
||||
if ((mCurToken.type == TOK_CLASS_END && !exclude) || (mCurToken.type == TOK_CLASS_END_EXCLUDE && exclude)) {
|
||||
return out;
|
||||
}
|
||||
else {
|
||||
goto READ_VAL;
|
||||
}
|
||||
}
|
||||
|
||||
AstAny* parseAny() {
|
||||
return new AstAny();
|
||||
}
|
||||
|
||||
AstVal<tAlphabetType>* parseVal() {
|
||||
auto out = new AstVal<tAlphabetType>(mCurToken.val);
|
||||
return out;
|
||||
}
|
||||
|
||||
AstAlternation* parseAlternation(AstNode* left) {
|
||||
auto right = parseElement();
|
||||
if (!right) {
|
||||
genError("Expected Alternation right Side");
|
||||
delete left;
|
||||
return nullptr;
|
||||
}
|
||||
|
||||
auto out = new AstAlternation();
|
||||
|
||||
out->mFirst = left;
|
||||
out->mSecond = right;
|
||||
|
||||
return out;
|
||||
}
|
||||
|
||||
AstRepetition* parseRepetition(AstNode* left, bool plus = false) {
|
||||
auto out = new AstRepetition();
|
||||
out->mNode = left;
|
||||
out->mPlus = plus;
|
||||
return out;
|
||||
}
|
||||
|
||||
AstIf* parseIf(AstNode* left) {
|
||||
auto out = new AstIf();
|
||||
out->mNode = left;
|
||||
return out;
|
||||
}
|
||||
|
||||
void genError(const char* desc) {
|
||||
mError = { desc, mOffset };
|
||||
}
|
||||
|
||||
Token& readTok() {
|
||||
|
||||
const tAlphabetType* crs = mSource + mOffset;
|
||||
|
||||
// zero termination string
|
||||
if (*crs == 0) {
|
||||
mCurToken.type = TOK_NONE;
|
||||
return mCurToken;
|
||||
}
|
||||
|
||||
mTokLength = 1;
|
||||
mCurToken.type = TOK_VAL;
|
||||
mCurToken.val = crs[0];
|
||||
|
||||
if (crs[0] == mEscapeSymbol) {
|
||||
mCurToken.val = crs[1];
|
||||
mTokLength = 2;
|
||||
}
|
||||
else {
|
||||
for (uhalni tok = 0; tok < TOK_SPECIALS_END_; tok++) {
|
||||
if (SpecialSymbols[tok] == mCurToken.val) {
|
||||
mCurToken.type = TokType(tok);
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
mOffset += mTokLength;
|
||||
return mCurToken;
|
||||
}
|
||||
|
||||
void discardTok() {
|
||||
mOffset -= mTokLength;
|
||||
mTokLength = 0;
|
||||
}
|
||||
};
|
||||
|
||||
template <typename tStateType>
|
||||
struct CompileError {
|
||||
ParseError mParseError;
|
||||
uhalni mRuleIndex = 0;
|
||||
tStateType mRuleState;
|
||||
const char* description = nullptr;
|
||||
[[nodiscard]] bool isError() const { return description; }
|
||||
};
|
||||
|
||||
template <typename tAlphabetType, typename tStateType, tStateType tNoStateVal, tStateType tFailedStateVal>
|
||||
class Compiler {
|
||||
|
||||
typedef NFA<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal> Graph;
|
||||
typedef typename Graph::Vertex Vertex;
|
||||
typedef Parser<tAlphabetType, tStateType, tNoStateVal> Parser;
|
||||
|
||||
struct Node {
|
||||
Vertex* left = nullptr;
|
||||
Vertex* right = nullptr;
|
||||
};
|
||||
|
||||
private:
|
||||
Graph* mGraph = nullptr;
|
||||
|
||||
public:
|
||||
CompileError<tStateType> mError;
|
||||
|
||||
Node compile(Graph& graph, const tAlphabetType* regex, tStateType state) {
|
||||
mGraph = &graph;
|
||||
return compileUtil(regex, state);
|
||||
}
|
||||
|
||||
Node compile(Graph& aGraph, init_list<Pair<const tAlphabetType*, tStateType>> aRules) {
|
||||
mGraph = &aGraph;
|
||||
|
||||
auto left = mGraph->addVertex();
|
||||
auto right = mGraph->addVertex();
|
||||
|
||||
halni idx = 0;
|
||||
for (auto rule: aRules) {
|
||||
|
||||
auto node = idx ? compileUtil(rule.head, rule.tail) : compileUtil(rule.head, rule.tail, left, right);
|
||||
|
||||
if (!(node.left && node.right)) {
|
||||
mError.mRuleIndex = idx;
|
||||
return {};
|
||||
}
|
||||
|
||||
if (idx) {
|
||||
transitionAny(left, node.left);
|
||||
transitionAny(node.right, right);
|
||||
}
|
||||
|
||||
idx++;
|
||||
}
|
||||
|
||||
mGraph->setStartVertex(left);
|
||||
|
||||
return { left, right };
|
||||
}
|
||||
|
||||
private:
|
||||
|
||||
Node compileUtil(const tAlphabetType* regex, tStateType state, Vertex* aLeft = nullptr, Vertex* aRight = nullptr) {
|
||||
Parser parser;
|
||||
auto astNode = parser.parse(regex);
|
||||
if (parser.mError.isError()) {
|
||||
mGraph->setStartVertex(nullptr);
|
||||
mError.description = "Parsing Of Regular Expression Failed";
|
||||
mError.mRuleState = state;
|
||||
mError.mParseError = parser.mError;
|
||||
return {};
|
||||
}
|
||||
|
||||
auto node = compileNode(astNode, aLeft, aRight);
|
||||
delete astNode;
|
||||
|
||||
mGraph->setVertexState(node.right, state);
|
||||
mGraph->setStartVertex(node.left);
|
||||
|
||||
return node;
|
||||
}
|
||||
|
||||
Node compileVal(AstVal<tAlphabetType>* val, Vertex* aLeft = nullptr, Vertex* aRight = nullptr) {
|
||||
auto left = aLeft ? aLeft : mGraph->addVertex();
|
||||
auto right = aRight ? aRight : mGraph->addVertex();
|
||||
transitionVal(left, right, val->mVal);
|
||||
return { left, right };
|
||||
}
|
||||
|
||||
Node compileAlternation(AstAlternation* alt, Vertex* aLeft = nullptr, Vertex* aRight = nullptr) {
|
||||
auto first_node = compileNode(alt->mFirst, aLeft, aRight);
|
||||
auto second_node = compileNode(alt->mSecond);
|
||||
transitionAny(first_node.left, second_node.left);
|
||||
transitionAny(second_node.right, first_node.right);
|
||||
return first_node;
|
||||
}
|
||||
|
||||
Node compileAny(AstAny*, Vertex* aLeft = nullptr, Vertex* aRight = nullptr) {
|
||||
auto left = aLeft ? aLeft : mGraph->addVertex();
|
||||
auto right = aRight ? aRight : mGraph->addVertex();
|
||||
transitionAny(left, right, true);
|
||||
return { left, right };
|
||||
}
|
||||
|
||||
Node compileRepeat(AstRepetition* repeat, Vertex* aLeft = nullptr, Vertex* aRight = nullptr) {
|
||||
if (repeat->mPlus) {
|
||||
auto middle = mGraph->addVertex();
|
||||
|
||||
auto left_node = compileNode(repeat->mNode, aLeft, middle);
|
||||
|
||||
auto right_node = compileNode(repeat->mNode, middle, aRight);
|
||||
transitionAny(right_node.right, right_node.left);
|
||||
transitionAny(right_node.left, right_node.right);
|
||||
|
||||
return { left_node.left, right_node.right };
|
||||
}
|
||||
else {
|
||||
auto node = compileNode(repeat->mNode, aLeft, aRight);
|
||||
transitionAny(node.right, node.left);
|
||||
transitionAny(node.left, node.right);
|
||||
return node;
|
||||
}
|
||||
}
|
||||
|
||||
Node compileIf(AstIf* ifNode, Vertex* aLeft = nullptr, Vertex* aRight = nullptr) {
|
||||
auto node = compileNode(ifNode->mNode, aLeft, aRight);
|
||||
transitionAny(node.left, node.right);
|
||||
return node;
|
||||
}
|
||||
|
||||
Node compileClass(AstClass<tAlphabetType>* node, Vertex* aLeft = nullptr, Vertex* aRight = nullptr) {
|
||||
auto left = aLeft ? aLeft : mGraph->addVertex();
|
||||
auto right = aRight ? aRight : mGraph->addVertex();
|
||||
|
||||
if (node->mRanges.length() == 1) {
|
||||
auto const& range = node->mRanges.first()->data;
|
||||
transitionRange(left, right, { range.mBegin, range.mEnd }, node->mExclude);
|
||||
return { left, right };
|
||||
}
|
||||
|
||||
for (auto range : node->mRanges) {
|
||||
auto middle = mGraph->addVertex();
|
||||
transitionRange(left, middle, { range.data().mBegin, range.data().mEnd }, node->mExclude);
|
||||
transitionAny(middle, right);
|
||||
}
|
||||
return { left, right };
|
||||
}
|
||||
|
||||
Node compileCompound(AstCompound* compound, Vertex* aLeft = nullptr, Vertex* aRight = nullptr) {
|
||||
Vertex* left = nullptr;
|
||||
Vertex* rigth = nullptr;
|
||||
|
||||
ualni idx = 0;
|
||||
for (auto child : compound->mChilds) {
|
||||
auto pass_left = idx == 0 ? aLeft : rigth;
|
||||
auto pass_right = idx == compound->mChilds.length() - 1 ? aRight : nullptr;
|
||||
auto node = compileNode(child.data(), pass_left, pass_right);
|
||||
if (!left) left = node.left;
|
||||
rigth = node.right;
|
||||
idx++;
|
||||
}
|
||||
|
||||
return { left, rigth };
|
||||
}
|
||||
|
||||
Node compileNode(AstNode* node, Vertex* aLeft = nullptr, Vertex* aRight = nullptr) {
|
||||
switch (node->mType) {
|
||||
case AstNode::CLASS: return compileClass((AstClass<tAlphabetType>*)node, aLeft, aRight);
|
||||
case AstNode::COMPOUND: return compileCompound((AstCompound*)node, aLeft, aRight);
|
||||
case AstNode::IF: return compileIf((AstIf*)node, aLeft, aRight);
|
||||
case AstNode::REPEAT: return compileRepeat((AstRepetition*)node, aLeft, aRight);
|
||||
case AstNode::ANY: return compileAny((AstAny*)node, aLeft, aRight);
|
||||
case AstNode::OR: return compileAlternation((AstAlternation*)node, aLeft, aRight);
|
||||
case AstNode::VAL: return compileVal((AstVal<tAlphabetType>*)node, aLeft, aRight);
|
||||
case AstNode::NONE:
|
||||
break;
|
||||
}
|
||||
ASSERT(0)
|
||||
return {};
|
||||
}
|
||||
|
||||
void transitionAny(Vertex* from, Vertex* to, bool consumes = false) {
|
||||
mGraph->addTransition(from, to, {}, consumes, true, false);
|
||||
}
|
||||
|
||||
void transitionVal(Vertex* from, Vertex* to, tAlphabetType val) {
|
||||
mGraph->addTransition(from, to, { val, val }, true, false, false);
|
||||
}
|
||||
|
||||
void transitionRange(Vertex* from, Vertex* to, Range<tAlphabetType> range, bool exclude) {
|
||||
mGraph->addTransition(from, to, range, true, false, exclude);
|
||||
}
|
||||
};
|
||||
|
||||
template <typename tAlphabetType, typename tStateType, tStateType tNoStateVal, tStateType tFailedStateVal>
|
||||
CompileError<tStateType> compile(NFA<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal>& out, const tAlphabetType* regex, tStateType state) {
|
||||
Compiler<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal> compiler;
|
||||
compiler.compile(out, regex, state);
|
||||
return compiler.mError;
|
||||
}
|
||||
|
||||
template <typename tAlphabetType, typename tStateType, tStateType tNoStateVal, tStateType tFailedStateVal>
|
||||
CompileError<tStateType> compile(NFA<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal>& out, const init_list<Pair<const tAlphabetType*, tStateType>>& rules) {
|
||||
Compiler<tAlphabetType, tStateType, tNoStateVal, tFailedStateVal> compiler;
|
||||
compiler.compile(out, rules);
|
||||
return compiler.mError;
|
||||
}
|
||||
}
|
||||
176
Tokenizer/public/Tokenizer.hpp
Normal file
176
Tokenizer/public/Tokenizer.hpp
Normal file
|
|
@ -0,0 +1,176 @@
|
|||
|
||||
#pragma once
|
||||
|
||||
#include "RegularExpression.h"
|
||||
#include "Strings.hpp"
|
||||
|
||||
namespace tp {
|
||||
|
||||
extern ModuleManifest gModuleTokenizer;
|
||||
|
||||
template <typename tAlphabetType, typename tTokType, tTokType tNoTokVal, tTokType tFailedTokVal>
|
||||
class Tokenizer {
|
||||
|
||||
TransitionMatrix<tAlphabetType, tTokType, tNoTokVal, tFailedTokVal> mTransitionMatrix;
|
||||
|
||||
RegEx::CompileError<tTokType> mError;
|
||||
|
||||
bool scanFailed() {
|
||||
return mTransitionMatrix.isTrapped();
|
||||
}
|
||||
|
||||
public:
|
||||
|
||||
Tokenizer() {
|
||||
MODULE_SANITY_CHECK(gModuleTokenizer)
|
||||
}
|
||||
|
||||
void build(const init_list<Pair<const tAlphabetType*, tTokType>>& rules) {
|
||||
NFA<tAlphabetType, tTokType, tNoTokVal, tFailedTokVal> nfa;
|
||||
|
||||
mError = RegEx::compile(nfa, rules);
|
||||
if (mError.isError()) {
|
||||
return;
|
||||
}
|
||||
|
||||
DFA<tAlphabetType, tTokType, tNoTokVal, tFailedTokVal> dfa(nfa);
|
||||
mTransitionMatrix.construct(dfa);
|
||||
}
|
||||
|
||||
[[nodiscard]] bool isBuild() const {
|
||||
return !mError.isError();
|
||||
}
|
||||
|
||||
const RegEx::CompileError<tTokType>& getBuildError() {
|
||||
return mError;
|
||||
}
|
||||
|
||||
void resetMatrix() {
|
||||
mTransitionMatrix.reset();
|
||||
}
|
||||
|
||||
tTokType advanceSymbol(tAlphabetType symbol) {
|
||||
return mTransitionMatrix.move(symbol);
|
||||
}
|
||||
|
||||
tTokType advanceToken(const tAlphabetType* source, ualni source_len, ualni* token_len) {
|
||||
tTokType out = tNoTokVal;
|
||||
*token_len = 0;
|
||||
for (ualni idx = 0; idx < source_len; idx++) {
|
||||
out = advanceSymbol(source[idx]);
|
||||
if (out != tNoTokVal) {
|
||||
*token_len = idx;
|
||||
break;
|
||||
}
|
||||
}
|
||||
return out;
|
||||
}
|
||||
|
||||
~Tokenizer() = default;
|
||||
};
|
||||
|
||||
template <typename tAlphabetType, typename tTokType, tTokType tNoTokVal, tTokType tFailedTokVal, tTokType tSourceEndTokVal>
|
||||
class SimpleTokenizer {
|
||||
|
||||
Tokenizer<tAlphabetType, tTokType, tNoTokVal, tFailedTokVal> mTokenizer;
|
||||
|
||||
const tAlphabetType* mSource = nullptr;
|
||||
ualni mLastTokLen = 0;
|
||||
ualni mSourceLen = 0;
|
||||
ualni mAdvancedOffset = 0;
|
||||
|
||||
public:
|
||||
|
||||
struct Cursor {
|
||||
const tAlphabetType* mSource = nullptr;
|
||||
ualni mAdvancedOffset = 0;
|
||||
const tAlphabetType* str() { return mSource + mAdvancedOffset; }
|
||||
};
|
||||
|
||||
SimpleTokenizer() = default;
|
||||
|
||||
void build(const init_list<Pair<const tAlphabetType*, tTokType>>& rules) {
|
||||
mTokenizer.build(rules);
|
||||
}
|
||||
|
||||
[[nodiscard]] bool isBuild() const {
|
||||
return mTokenizer.isBuild();
|
||||
}
|
||||
|
||||
const RegEx::CompileError<tTokType>& getBuildError() {
|
||||
return mTokenizer.getBuildError();
|
||||
}
|
||||
|
||||
void bindSource(const tAlphabetType* source) {
|
||||
mSource = source;
|
||||
while (mSource[mSourceLen]) mSourceLen++;
|
||||
mSourceLen++;
|
||||
}
|
||||
|
||||
[[nodiscard]] bool isInputLeft() const {
|
||||
if (!mSource) {
|
||||
return false;
|
||||
}
|
||||
if (mSource[mAdvancedOffset] == nullptr) {
|
||||
return false;
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
Cursor getCursor() const {
|
||||
return { mSource, mAdvancedOffset };
|
||||
}
|
||||
|
||||
Cursor getCursorPrev() const {
|
||||
return { mSource, mAdvancedOffset - mLastTokLen };
|
||||
}
|
||||
|
||||
void setCursor(const Cursor& crs) {
|
||||
mAdvancedOffset = crs.mAdvancedOffset;
|
||||
mLastTokLen = 0;
|
||||
}
|
||||
|
||||
tTokType readTok() {
|
||||
if (mSourceLen == mAdvancedOffset + 1) {
|
||||
return tSourceEndTokVal;
|
||||
}
|
||||
|
||||
tTokType out = mTokenizer.advanceToken(mSource + mAdvancedOffset, mSourceLen - mAdvancedOffset, &mLastTokLen);
|
||||
mAdvancedOffset += mLastTokLen;
|
||||
return out;
|
||||
}
|
||||
|
||||
tTokType lookupTok() {
|
||||
auto out = readTok();
|
||||
discardTok();
|
||||
return out;
|
||||
}
|
||||
|
||||
void discardTok() {
|
||||
mTokenizer.resetMatrix();
|
||||
mAdvancedOffset -= mLastTokLen;
|
||||
mLastTokLen = 0;
|
||||
}
|
||||
|
||||
void skipTok() {
|
||||
readTok();
|
||||
}
|
||||
|
||||
void reset() {
|
||||
mAdvancedOffset = mLastTokLen = 0;
|
||||
mTokenizer.resetMatrix();
|
||||
}
|
||||
|
||||
[[nodiscard]] ualni lastTokLEn() const {
|
||||
return mLastTokLen;
|
||||
}
|
||||
|
||||
String extractVal() {
|
||||
auto crs = getCursorPrev();
|
||||
String out;
|
||||
out.resize(mLastTokLen + 1);
|
||||
memCopy(out.write(), crs.str(), mLastTokLen);
|
||||
return out;
|
||||
}
|
||||
};
|
||||
}
|
||||
Loading…
Add table
Add a link
Reference in a new issue