| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| #ifndef ADC_TKPSTAMA_HXX |
| #define ADC_TKPSTAMA_HXX |
| |
| // USED SERVICES |
| // BASE CLASSES |
| #include <tokens/tkpcontx.hxx> |
| // COMPONENTS |
| #include <tokens/stmstarr.hxx> |
| #include <tokens/stmstfin.hxx> |
| |
| /** @descr |
| This state-machine models state transitions from one state to another |
| per indices of branches. If the indices represent ascii-char-values, |
| the state-machine can be used for recognising tokens of text. |
| |
| The state-machine can be a status itself. |
| |
| StateMachine needs the array-size of all stati as a guess, how many stati |
| the state machine will contain, when at work. |
| |
| |
| **/ |
| class StateMachine |
| { |
| public: |
| // Types |
| typedef StmStatus::Branch Branch; |
| typedef StmStatus * * StatusList; |
| |
| //# Interface self |
| // LIFECYCLE |
| StateMachine( |
| intt in_nStatusSize, |
| intt in_nInitial_StatusListSize ); /// The user of the constructor should guess |
| /// the approximate number of stati here to |
| /// avoid multiple reallocations. |
| /// @#AddStatus |
| intt AddStatus( /// @return the new #Status' ID |
| DYN StmStatus * let_dpStatus); |
| /// @#AddToken |
| void AddToken( |
| const char * in_sToken, |
| TextToken::F_CRTOK in_fTokenCreateFunction, |
| const INT16 * in_aBranches, |
| INT16 in_nBoundsStatus ); |
| ~StateMachine(); |
| |
| |
| // OPERATIONS |
| StmBoundsStatus & |
| GetCharChain( |
| TextToken::F_CRTOK & |
| o_nTokenCreateFunction, |
| CharacterSource & io_rText ); |
| private: |
| // SERVICE FUNCTIONS |
| StmStatus & Status( |
| intt in_nStatusNr) const; |
| StmArrayStatus & |
| CurrentStatus() const; |
| StmBoundsStatus * |
| BoundsStatus() const; |
| |
| /// Sets the PeekedStatus. |
| void Peek( |
| intt in_nBranch); |
| |
| void ResizeStati(); // Adds space for 32 stati. |
| |
| // DATA |
| StatusList pStati; /// List of Status, implemented as simple C-array of length #nStatiSpace |
| /// with nStatiLength valid members (beginning from zero). |
| intt nCurrentStatus; |
| intt nPeekedStatus; |
| |
| intt nStatusSize; /// Size of the branch array of a single status. |
| |
| intt nNrofStati; /// Nr of Stati so far. |
| intt nStatiSpace; /// Size of allocated array for #pStati (size in items). |
| }; |
| |
| |
| |
| /** @#AddToken |
| @descr |
| Adds a token, which will be recogniszeds by the |
| statemachine. |
| |
| |
| **/ |
| |
| |
| |
| #endif |
| |
| |
