init

Telegram/lib_webview/webview/webview_data_stream_memory.cpp

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#include "webview/webview_data_stream_memory.h"
+
+namespace Webview {
+
+DataStreamFromMemory::DataStreamFromMemory(
+	QByteArray data,
+	std::string mime)
+: _data(data)
+, _mime(mime) {
+}
+
+std::int64_t DataStreamFromMemory::size() {
+	return _data.size();
+}
+
+std::string DataStreamFromMemory::mime() {
+	return _mime;
+}
+
+std::int64_t DataStreamFromMemory::seek(
+		int origin,
+		std::int64_t position) {
+	const auto length = size();
+	switch (origin) {
+	case SEEK_SET:
+		return (position >= 0 && position <= length)
+			? ((_offset = position))
+			: -1;
+	case SEEK_CUR:
+		return (_offset + position >= 0 && _offset + position <= length)
+			? ((_offset += position))
+			: -1;
+	case SEEK_END:
+		return (length + position >= 0 && position <= 0)
+			? ((_offset = length + position))
+			: -1;
+	}
+	return -1;
+}
+
+std::int64_t DataStreamFromMemory::read(
+		void *buffer,
+		std::int64_t requested) {
+	if (requested < 0) {
+		return -1;
+	}
+	const auto copy = std::min(std::int64_t(size() - _offset), requested);
+	if (copy > 0) {
+		memcpy(buffer, _data.constData() + _offset, copy);
+		_offset += copy;
+	}
+	return copy;
+}
+
+} // namespace Webview