first release of translation facility

* runtime - loading and translating
 * design-time - works with *.ts file (pip_tr utility)
 * compile-time - CMake macro for compile *.ts

libs/main/application/pitranslator_p.cpp

@@ -0,0 +1,124 @@
+/*
+    PIP - Platform Independent Primitives
+	Translation private
+    Ivan Pelipenko peri4ko@yandex.ru
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation, either version 3 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 Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "pitranslator_p.h"
+
+#include "pichunkstream.h"
+#include "piiodevice.h"
+
+constexpr int currentVersion = 1;
+const PIByteArray fileHeader("PIPBTF", 6);
+
+
+void PITranslatorPrivate::Context::add(const PIMap<uint, PIString> & sm) {
+	auto it = sm.makeIterator();
+	while (it.next())
+		strings[it.key()] = it.value();
+}
+
+
+void PITranslatorPrivate::Translation::clear() {
+	piDeleteAll(contexts.values());
+	contexts.clear();
+	lang.clear();
+}
+
+
+PITranslatorPrivate::Context * PITranslatorPrivate::Translation::createContext(const PIString & context) {
+	return createContext(context.hash());
+}
+
+
+PITranslatorPrivate::Context * PITranslatorPrivate::Translation::createContext(uint hash) {
+	auto & ret(contexts[hash]);
+	if (!ret) ret = new Context();
+	return ret;
+}
+
+
+PIString PITranslatorPrivate::Translation::translate(const PIString & in, const PIString & context) {
+	auto c = contexts.value(context.hash());
+	if (!c) return in;
+	return c->strings.value(in.hash(), in);
+}
+
+
+bool PITranslatorPrivate::Translation::load(const PIByteArray & data) {
+	if (data.size_s() <= 4) return false;
+	PIChunkStream cs(data);
+	Context * ctx = nullptr;
+	PIMap<uint, PIString> strings;
+	while (!cs.atEnd()) {
+		switch (cs.read()) {
+		case 1: {
+			int version = cs.getData<int>();
+			if (version != currentVersion) {
+				piCout << "Invalid translation version!";
+				return false;
+			}
+		} break;
+		case 3: {
+			uint ctx_hash = cs.getData<uint>();
+			ctx           = createContext(ctx_hash);
+		} break;
+		case 4: {
+			cs.get(strings);
+			if (ctx) ctx->add(strings);
+		} break;
+		}
+	}
+	return true;
+}
+
+
+int PITranslatorPrivate::Translation::count() const {
+	int ret  = 0;
+	auto cit = contexts.makeIterator();
+	while (cit.next())
+		ret += cit.value()->strings.size_s();
+	return ret;
+}
+
+
+PIByteArray PITranslatorPrivate::Translation::save() {
+	PIChunkStream cs;
+	cs.add(1, currentVersion).add(2, lang);
+	auto cit = contexts.makeIterator();
+	while (cit.next()) {
+		cs.add(3, cit.key()).add(4, cit.value()->strings);
+	}
+	return cs.data();
+}
+
+
+int PITranslatorPrivate::headerSize() {
+	return fileHeader.size_s();
+}
+
+
+bool PITranslatorPrivate::checkHeader(PIIODevice * d) {
+	if (!d) return false;
+	return d->read(fileHeader.size_s()) == fileHeader;
+}
+
+
+void PITranslatorPrivate::writeHeader(PIIODevice * d) {
+	if (!d) return;
+	d->write(fileHeader);
+}