--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/src/lib/AbstractParser.cpp Sat Jul 24 17:35:27 2021 +0200
@@ -0,0 +1,92 @@
+/**
+ * Relational pipes
+ * Copyright © 2021 František Kučera (Frantovo.cz, GlobalCode.info)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "AbstractParser.h"
+#include "TransactionalBuffer.h"
+
+namespace relpipe {
+namespace in {
+namespace asn1 {
+namespace lib {
+
+class AbstractParserImpl {
+private:
+ friend AbstractParser;
+ AbstractParser* interface;
+ TransactionalBuffer buffer;
+public:
+
+ AbstractParserImpl(AbstractParser* interface) : interface(interface) {
+ }
+
+ virtual ~AbstractParserImpl() {
+ }
+};
+
+AbstractParser::AbstractParser() {
+ implementation = new AbstractParserImpl(this);
+}
+
+AbstractParser::~AbstractParser() {
+ delete implementation;
+}
+
+void AbstractParser::write(const uint8_t* buffer, const size_t length) {
+ try {
+ // TODO: do not write to the buffer, just append in read()/peek() and write just the part that was not read during this cycle
+ implementation->buffer.write(buffer, length);
+
+ // TODO: call an overridable method to get preferred minimum block size and run cycle only if we have enough data or EOF
+ // and/or remember the length of last failed (rollbacked) read() call
+ update();
+ commit();
+ } catch (const TransactionalBuffer::ReadBufferUnderflowException& e) {
+ rollback();
+ } catch (const AbstractParser::ExplicitRollbackException& e) {
+ rollback();
+ }
+}
+
+void AbstractParser::close() {
+ // TODO: check remaining data + call update() or just let parsers override this method?
+}
+
+void AbstractParser::rollback() {
+ // TODO: notify rollback listeners? (they can monitor the performance / frequency of rollbacks)
+ implementation->buffer.rollbackRead();
+}
+
+void AbstractParser::commit() {
+ implementation->buffer.commitRead();
+}
+
+void AbstractParser::read(uint8_t* buffer, const size_t length) {
+ implementation->buffer.read(buffer, length);
+}
+
+void AbstractParser::peek(uint8_t* buffer, const size_t length) {
+ implementation->buffer.peek(buffer, length);
+}
+
+size_t AbstractParser::getBytesRead() {
+ return implementation->buffer.getBytesRead();
+}
+
+}
+}
+}
+}