genesis-3d_engine/Engine/addons/guibase/utf16string.cc

/****************************************************************************
Copyright (c) 2011-2013,WebJet Business Division,CYOU

http://www.genesis-3d.com.cn

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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The above copyright notice and this permission notice shall be included in
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THE SOFTWARE.
****************************************************************************/
#include "stdneb.h"
#include "utf16string.h"

GuiBase::UTF16 g_defaulText[1] = {0};

namespace GuiBase
{

	UTF16String::UTF16String()
		: m_text(g_defaulText)
		, m_len(0)
		, m_buffer_len(0)
	{
	}

	UTF16String::UTF16String (const UTF16* str) 
		: m_text(g_defaulText)
		, m_buffer_len(0)
	{
		m_len = UTF16Length(str);
		_checkBuffer(m_len + 1);
		Memory::Copy(str, m_text, m_len * _wordSize());
		m_text[m_len] = NULL;
	}

	UTF16String::UTF16String (const UTF16String &other) 
		: m_text(g_defaulText)
		, m_buffer_len(0)
	{
		m_len = other.m_len;
		_checkBuffer(m_len + 1);
		Memory::Copy(other.m_text, m_text, m_len * _wordSize());
		m_text[m_len] = NULL;
	}
	void UTF16String::operator = (const UTF16String& other)
	{
		m_text = g_defaulText;
		m_buffer_len = 0;
		m_len = other.m_len;

		_checkBuffer(m_len + 1);
		Memory::Copy(other.m_text, m_text, m_len * _wordSize());
		m_text[m_len] = NULL;
	}
	void UTF16String::operator += (const UTF16String& other)
	{
		SizeT len = m_len + other.m_len;
		if (len + 1 > m_buffer_len)
		{
			UTF16* old_text = m_text;
			m_buffer_len = len * 2 + 1;
			m_text = n_new_array(UTF16, m_buffer_len);
			Memory::Copy(old_text, m_text, m_len);
			n_delete_array(old_text);
		}
		Memory::Copy(other.m_text, m_text + m_len, other.m_len * _wordSize());
		m_len = len;
		m_text[len] = NULL;	
	}
	void UTF16String::operator += (const UTF16* other)
	{
		SizeT other_len = UTF16Length(other);
		SizeT len = m_len + other_len;
		if (len + 1 > m_buffer_len)
		{
			UTF16* old_text = m_text;
			m_buffer_len = len * 2 + 1;
			m_text = n_new_array(UTF16, m_buffer_len);
			Memory::Copy(old_text, m_text, m_len);
			n_delete_array(old_text);
		}
		Memory::Copy(other, m_text + m_len, other_len * _wordSize());
		m_len = len;
		m_text[len] = NULL;	
	}

	UTF16String::~UTF16String () 
	{
		if (m_text)
		{
			n_delete_array(m_text);
		}

	}

	SizeT UTF16String::UTF16Length(const UTF16* ptr)
	{
		UTF16* temp = (UTF16*)ptr;
		n_assert( temp != NULL);
		while(0 != *temp)
		{
			++temp;
		}
		return (temp - ptr);// / sizeof(UTF16);
	}


	void UTF16String::_checkBuffer(SizeT len)
	{
		if (len > m_buffer_len)
		{
			m_buffer_len = len * 2 + 1;
			if (m_text && m_text != g_defaulText)
			{
				n_delete_array(m_text);
			}
			m_text = n_new_array(UTF16, m_buffer_len);			
		}
	}

}