bch_codedview.cpp

bch 编码的源代码 用vc写的 供大家参考使用

// BCH_CodedView.cpp : implementation file
//

#include "stdafx.h"
#include "BCH_Coding.h"
#include "BCH_CodedView.h"
#include "BCH_CodedFrm.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// BCH_CodedView

IMPLEMENT_DYNCREATE(BCH_CodedView, CScrollView)

BCH_CodedView::BCH_CodedView()
{
}

BCH_CodedView::~BCH_CodedView()
{
}


BEGIN_MESSAGE_MAP(BCH_CodedView, CScrollView)
	//{{AFX_MSG_MAP(BCH_CodedView)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// BCH_CodedView drawing

void BCH_CodedView::OnInitialUpdate()
{
	CScrollView::OnInitialUpdate();

	CSize sizeTotal;
	// TODO: calculate the total size of this view
	sizeTotal.cx = sizeTotal.cy = 100;
	SetScrollSizes(MM_TEXT, sizeTotal);
}

void BCH_CodedView::OnDraw(CDC* pDC)
{
	CBCH_CodingDoc* pDoc = (CBCH_CodingDoc*)GetDocument();
	CBCH_CodingApp* APP = (CBCH_CodingApp*)AfxGetApp();
	ASSERT_VALID(pDoc);
	uint8_t*	data;
	if (APP->IsFileCoded == TRUE)
	{
		int			i, j;
		uint64_t	lines;
		uint8_t		k;
		CString		str;
		TEXTMETRIC	tm;
		if (pDoc->f_BCH.GetLength() % 32 != 0)
			lines = pDoc->f_BCH.GetLength() / 32 + 1;
		else lines = pDoc->f_BCH.GetLength() / 32;

		pDC->GetTextMetrics(&tm);
		pDC->SetTextColor(RGB(100, 100, 100));
		
		text_x = 0;
		text_y = 0;
		pDoc->f_BCH.SeekToBegin();
		char buffer[3];
		CString str_temp;
		for (i = 0; i < lines; i++)
		{		
			//显示行标
			if (i <= 0x0f) 
				str.Format("00%x0h: ", i);
			else if (i > 0x0f && i <= 0xff)
			{
				itoa(i, buffer, 16);
				str_temp = buffer;
				str.Format("0%s0h: ", str_temp);
			}
			else if (i > 0xff && i <= 0x0fff)
			{
				uint8_t temp = (uint8_t)(i / 256);
				itoa(temp, buffer, 16);
				str = "0x";
				str += buffer;
				temp = (uint8_t)(i % 256);
				itoa(temp, buffer, 16);
				if (temp <= 0x0f)
					str += '0';
				str += buffer;
				str += "0h: ";
			}
			else str = "";
			pDC->TextOut(text_x, text_y, str);
			text_x += tm.tmAveCharWidth * 7;
			
			//文件转化成16进制显示,每个码占两个字节
			if (i == lines - 1)
			{
				for (j = 0; j < (uint64_t)(pDoc->f_BCH.GetLength() % 32 / 2); j++)
				{
					for (k = 0; k < 2; k++)		//每两个字节作为一个码字
					{
						pDoc->f_BCH.Read(data, 1);
						if (*data <= 0x0f)
							str.Format("0%x", data);
						else str.Format("%x", data);
						str.MakeUpper();
						pDC->TextOut(text_x, text_y, str);
						text_x += tm.tmAveCharWidth * 2;
					}
					text_x += tm.tmAveCharWidth;
				}
			}
			else 
			{
				for (j = 0; j < 16; j++)
				{
					for (k = 0; k < 2; k++)
					{
						pDoc->f_BCH.Read(data, 1);
						if (*data <= 0x0f) str.Format("0%x", data);
						else str.Format("%x", data);
						str.MakeUpper();
						pDC->TextOut(text_x, text_y, str);
						text_x += tm.tmAveCharWidth * 2;
					}
					text_x += tm.tmAveCharWidth;
				}
			}
			text_x = 0;
			text_y += (uint16_t)tm.tmHeight;	
		}
	}
}

/////////////////////////////////////////////////////////////////////////////
// BCH_CodedView diagnostics

#ifdef _DEBUG
void BCH_CodedView::AssertValid() const
{
	CScrollView::AssertValid();
}

void BCH_CodedView::Dump(CDumpContext& dc) const
{
	CScrollView::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// BCH_CodedView message handlers