1 /**

     2  * Relational pipes

     3  * Copyright © 2021 František Kučera (Frantovo.cz, GlobalCode.info)

     4  *

     5  * This program is free software: you can redistribute it and/or modify

     6  * it under the terms of the GNU General Public License as published by

     7  * the Free Software Foundation, version 3 of the License.

     8  *

     9  * This program is distributed in the hope that it will be useful,

    10  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

    12  * GNU General Public License for more details.

    13  *

    14  * You should have received a copy of the GNU General Public License

    15  * along with this program. If not, see <http://www.gnu.org/licenses/>.

    16  */

    17 

    18 #include "AbstractParser.h"

    19 

    20 namespace relpipe {

    21 namespace in {

    22 namespace asn1 {

    23 namespace lib {

    24 

    25 class AbstractParserImpl {

    26 private:

    27 	AbstractParser* interface;

    28 public:

    29 

    30 	AbstractParserImpl(AbstractParser* interface) : interface(interface) {

    31 	}

    32 

    33 	virtual ~AbstractParserImpl() {

    34 	}

    35 

    36 	void write(const char* buffer, const size_t length) {

    37 		// TODO: update pointers and positions

    38 		try {

    39 			// TODO: call an overridable method to get preferred minimum block size and run cycle only if we have enough data or EOF

    40 			interface->update();

    41 			commit();

    42 		} catch (const AbstractParser::ReadBufferUnderflowException& e) {

    43 			rollback();

    44 		} catch (const AbstractParser::ExplicitRollbackException& e) {

    45 			rollback();

    46 		}

    47 	}

    48 

    49 	void rollback() {

    50 		// FIXME: store content of the current buffer + update pointers and positions

    51 		// TODO: notify rollback listeners? (they can monitor the performance / frequency of rollbacks)

    52 	}

    53 

    54 	void commit() {

    55 	}

    56 

    57 	void read(char* buffer, const size_t length) {

    58 	}

    59 

    60 	void peek(char* buffer, const size_t length) {

    61 	}

    62 };

    63 

    64 AbstractParser::AbstractParser() {

    65 	implementation = new AbstractParserImpl(this);

    66 }

    67 

    68 AbstractParser::~AbstractParser() {

    69 	delete (AbstractParserImpl*) implementation;

    70 }

    71 

    72 void AbstractParser::write(const char* buffer, const size_t length) {

    73 	((AbstractParserImpl*) implementation)->write(buffer, length);

    74 }

    75 

    76 void AbstractParser::commit() {

    77 	((AbstractParserImpl*) implementation)->commit();

    78 }

    79 

    80 void AbstractParser::rollback() {

    81 	((AbstractParserImpl*) implementation)->rollback();

    82 }

    83 

    84 void AbstractParser::read(char* buffer, const size_t length) {

    85 	((AbstractParserImpl*) implementation)->read(buffer, length);

    86 }

    87 

    88 void AbstractParser::peek(char* buffer, const size_t length) {

    89 	((AbstractParserImpl*) implementation)->peek(buffer, length);

    90 }

    91 

    92 }

    93 }

    94 }

    95 }