Merge pull request #780 from m-tmatma/feature/fix-bug-CNative-Clear

バッファが空の状態で CNativeW::Clear を呼び出したときに落ちる不具合修正

sakura_core/mem/CMemory.cpp

@@ -52,6 +52,7 @@ void CMemory::_init_members()
 CMemory::CMemory()
 {
 	_init_members();
+	SetRawData( NULL, 0 );
 }
 
 /*

tests/unittests/test-cmemory.cpp

@@ -0,0 +1,37 @@
+/*! @file */
+/*
+	Copyright (C) 2018-2019 Sakura Editor Organization
+
+	This software is provided 'as-is', without any express or implied
+	warranty. In no event will the authors be held liable for any damages
+	arising from the use of this software.
+
+	Permission is granted to anyone to use this software for any purpose,
+	including commercial applications, and to alter it and redistribute it
+	freely, subject to the following restrictions:
+
+		1. The origin of this software must not be misrepresented;
+		   you must not claim that you wrote the original software.
+		   If you use this software in a product, an acknowledgment
+		   in the product documentation would be appreciated but is
+		   not required.
+
+		2. Altered source versions must be plainly marked as such,
+		   and must not be misrepresented as being the original software.
+
+		3. This notice may not be removed or altered from any source
+		   distribution.
+*/
+#include <gtest/gtest.h>
+#include "mem/CMemory.h"
+
+/*!
+	_SetRawLength(0) を呼び出して落ちないことを確認する
+*/
+TEST(CMemory, SetRawLengthToZero)
+{
+	CMemory memory;
+
+	// _SetRawLength(0) を呼び出して落ちないことを確認する
+	memory._SetRawLength(0);
+}

tests/unittests/test-cnative.cpp

@@ -29,6 +29,8 @@
 /*!
 	CNativeW::Clear のデータサイズのクリアをテストする
 
+	0. バッファが空の状態でクリアする
+
 	1-1. 固定データを追加する
 	1-2. バッファの状態を取得する
 	1-3. バッファの状態をチェックする
@@ -47,6 +49,9 @@ TEST(CNativeW, Clear)
 	constexpr const int		fixedPatternLen = 3;
 
 	CNativeW stringW;
+
+	// 0. バッファが空の状態でクリアする
+	stringW.Clear();
 
 	// 1-1. 固定データを追加する