From 2462d03f322261bd616721c2b2065c4004b36c9c Mon Sep 17 00:00:00 2001
From: Michele Calgaro <michele.calgaro@yahoo.it>
Date: Sat, 11 May 2024 21:28:48 +0900
Subject: Initial import (as is) from Debian Snapshot's 'fbreader' source code
 (https://snapshot.debian.org/package/fbreader/0.99.4%2Bdfsg-6). The Debian
 code is provided under GPL2 license.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
---
 fbreader/src/formats/tcr/PPLBookReader.cpp | 129 +++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 fbreader/src/formats/tcr/PPLBookReader.cpp

(limited to 'fbreader/src/formats/tcr/PPLBookReader.cpp')

diff --git a/fbreader/src/formats/tcr/PPLBookReader.cpp b/fbreader/src/formats/tcr/PPLBookReader.cpp
new file mode 100644
index 0000000..9b7d271
--- /dev/null
+++ b/fbreader/src/formats/tcr/PPLBookReader.cpp
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2004-2012 Geometer Plus <contact@geometerplus.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <cstring>
+#include <cctype>
+
+#include "PPLBookReader.h"
+#include <ZLInputStream.h>
+
+static const std::size_t BUFFER_SIZE = 2048;
+
+PPLBookReader::PPLBookReader(BookModel &model, const std::string &encoding) : EncodedTextReader(encoding), myModelReader(model) {
+	myBuffer = new char[BUFFER_SIZE + 1];
+}
+
+PPLBookReader::~PPLBookReader() {
+	delete[] myBuffer;
+}
+
+bool PPLBookReader::currentParagraphIsEmpty() const {
+	const char *ptr = myCurrentParagraph.data();
+	const char *end = ptr + myCurrentParagraph.length();
+	for (; ptr < end; ++ptr) {
+		if (!std::isspace((unsigned char)*ptr)) {
+			return false;
+		}
+	}
+	return true;
+}
+
+void PPLBookReader::addParagraph() {
+	static const std::string END_OF_TEXT = "<* >";
+	if (!myCurrentParagraph.empty()) {
+		if (currentParagraphIsEmpty()) {
+			++myEmptyLineCounter;
+			if (myEmptyLineCounter >= 2) {
+				myModelReader.beginParagraph(ZLTextParagraph::EMPTY_LINE_PARAGRAPH);
+				myModelReader.endParagraph();
+			}
+		} else if (myEmptyLineCounter < 2) {
+			myModelReader.beginParagraph();
+			myModelReader.addControl(TITLE, true);
+			myModelReader.addData(myCurrentParagraph);
+			myModelReader.endParagraph();
+		} else if (myCurrentParagraph[0] == 9) {
+			myModelReader.beginParagraph();
+			myModelReader.addData(myCurrentParagraph);
+			myModelReader.endParagraph();
+		} else if ((myCurrentParagraph.length() >= 2) &&
+				(myCurrentParagraph[0] == '*') &&
+				(myCurrentParagraph[1] == ' ')) {
+			myCurrentParagraph.erase(0, 2);
+			myModelReader.insertEndOfSectionParagraph();
+			myModelReader.beginContentsParagraph();
+			myModelReader.addContentsData(myCurrentParagraph);
+			myModelReader.endContentsParagraph();
+			myModelReader.beginParagraph();
+			myModelReader.addControl(SECTION_TITLE, true);
+			myModelReader.addData(myCurrentParagraph);
+			myModelReader.endParagraph();
+		} else if (myCurrentParagraph.substr(0, 4) != END_OF_TEXT) {
+			myModelReader.beginParagraph();
+			myModelReader.addControl(SUBTITLE, true);
+			myModelReader.addData(myCurrentParagraph);
+			myModelReader.endParagraph();
+		}
+		myCurrentParagraph.erase();
+	}
+}
+
+bool PPLBookReader::readDocument(ZLInputStream &stream) {
+	if (!stream.open()) {
+		return false;
+	}
+
+	myModelReader.setMainTextModel();
+	myModelReader.pushKind(REGULAR);
+	myCurrentParagraph.erase();
+	myEmptyLineCounter = 0;
+
+	// "PPL\r\n"
+	stream.seek(5, false);
+
+	std::size_t size;
+	do {
+		size = stream.read(myBuffer, BUFFER_SIZE);
+		myBuffer[size] = '\0';
+
+		const char *start = myBuffer;
+		const char *end = myBuffer + size;
+		const char *eol;
+		do {
+			eol = std::strchr(start, '\n');
+			if (eol != 0) {
+				if (start < eol) {
+					myConverter->convert(myCurrentParagraph, start, eol);
+				}
+				addParagraph();
+				start = eol + 1;
+			} else {
+				if (start < end) {
+					myConverter->convert(myCurrentParagraph, start, end);
+				}
+			}
+		} while (eol != 0);
+	} while (size == BUFFER_SIZE);
+
+	addParagraph();
+
+	stream.close();
+
+	return true;
+}
-- 
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