// floatconvDlg.cpp : implementation file
//
#include "stdafx.h"
#include "floatconv.h"
#include "floatconvDlg.h"
#include "math.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CAboutDlg dialog used for App About
class CAboutDlg : public CDialog
{
public:
CAboutDlg();
// Dialog Data
//{{AFX_DATA(CAboutDlg)
enum { IDD = IDD_ABOUTBOX };
//}}AFX_DATA
// ClassWizard generated virtual function overrides
//{{AFX_VIRTUAL(CAboutDlg)
protected:
virtual void DoDataExchange(CDataExchange* pDX); // DDX/DDV support
//}}AFX_VIRTUAL
// Implementation
protected:
//{{AFX_MSG(CAboutDlg)
//}}AFX_MSG
DECLARE_MESSAGE_MAP()
};
CAboutDlg::CAboutDlg() : CDialog(CAboutDlg::IDD)
{
//{{AFX_DATA_INIT(CAboutDlg)
//}}AFX_DATA_INIT
}
void CAboutDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CAboutDlg)
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CAboutDlg, CDialog)
//{{AFX_MSG_MAP(CAboutDlg)
// No message handlers
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CFloatconvDlg dialog
CFloatconvDlg::CFloatconvDlg(CWnd* pParent /*=NULL*/)
: CDialog(CFloatconvDlg::IDD, pParent)
{
//{{AFX_DATA_INIT(CFloatconvDlg)
m_Byte1Str = _T("");
m_Byte2Str = _T("");
m_Byte3Str = _T("");
m_Byte4Str = _T("");
m_FloatFormat = -1;
m_Exp = 0;
m_Mant = _T("");
m_Float = _T("");
m_Note = _T("");
m_Info = _T("");
//}}AFX_DATA_INIT
// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}
void CFloatconvDlg::DoDataExchange(CDataExchange* pDX)
{
CDialog::DoDataExchange(pDX);
//{{AFX_DATA_MAP(CFloatconvDlg)
DDX_Control(pDX, IDC_BYTE4, m_Byte4Control);
DDX_Text(pDX, IDC_BYTE1, m_Byte1Str);
DDV_MaxChars(pDX, m_Byte1Str, 2);
DDX_Text(pDX, IDC_BYTE2, m_Byte2Str);
DDV_MaxChars(pDX, m_Byte2Str, 2);
DDX_Text(pDX, IDC_BYTE3, m_Byte3Str);
DDV_MaxChars(pDX, m_Byte3Str, 2);
DDX_Text(pDX, IDC_BYTE4, m_Byte4Str);
DDV_MaxChars(pDX, m_Byte4Str, 2);
DDX_Radio(pDX, IDC_RADIOHT24, m_FloatFormat);
DDX_Text(pDX, IDC_EXP, m_Exp);
DDX_Text(pDX, IDC_MANT, m_Mant);
DDX_Text(pDX, IDC_FLOAT, m_Float);
DDX_Text(pDX, IDC_NOTE, m_Note);
DDX_Text(pDX, IDC_INFO, m_Info);
//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CFloatconvDlg, CDialog)
//{{AFX_MSG_MAP(CFloatconvDlg)
ON_WM_SYSCOMMAND()
ON_WM_PAINT()
ON_WM_QUERYDRAGICON()
ON_BN_CLICKED(IDC_B2F, OnB2f)
ON_BN_CLICKED(IDC_F2B, OnF2b)
ON_EN_MAXTEXT(IDC_BYTE1, OnMaxtextByte1)
ON_BN_CLICKED(IDC_RADIOHT24, OnHT24)
ON_BN_CLICKED(IDC_RADIOIEEE32, OnIEEE32)
ON_BN_CLICKED(IDC_RADIOMCHIP24, OnMCHIP24)
ON_BN_CLICKED(IDC_RADIOMCHIP32, OnMCHIP32)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CFloatconvDlg message handlers
BOOL CFloatconvDlg::OnInitDialog()
{
CDialog::OnInitDialog();
// Add "About..." menu item to system menu.
// IDM_ABOUTBOX must be in the system command range.
ASSERT((IDM_ABOUTBOX & 0xFFF0) == IDM_ABOUTBOX);
ASSERT(IDM_ABOUTBOX < 0xF000);
CMenu* pSysMenu = GetSystemMenu(FALSE);
if (pSysMenu != NULL)
{
CString strAboutMenu;
strAboutMenu.LoadString(IDS_ABOUTBOX);
if (!strAboutMenu.IsEmpty())
{
pSysMenu->AppendMenu(MF_SEPARATOR);
pSysMenu->AppendMenu(MF_STRING, IDM_ABOUTBOX, strAboutMenu);
}
}
// Set the icon for this dialog. The framework does this automatically
// when the application's main window is not a dialog
SetIcon(m_hIcon, TRUE); // Set big icon
SetIcon(m_hIcon, FALSE); // Set small icon
// TODO: Add extra initialization here
m_FloatFormat = 0; // hitech
m_Note = "Note:";
/* m_Info =
"Hitech C compiler, ref. Hitech C Compiler manual p81\n"\
"SEEE EEEE EMMM MMMM MMMM MMMM\n"\
"S sign, E exponent, M mantissa\n";*/
if (!m_Info.LoadString(IDS_HITECH24))
m_Info = "Hitech info string not found";
m_Byte1Str = "0";
m_Byte2Str = "0";
m_Byte3Str = "0";
m_Byte4Str = "0";
m_Byte4Control.SetReadOnly(TRUE);
m_Float = "0";
UpdateData(FALSE);
return TRUE; // return TRUE unless you set the focus to a control
}
void CFloatconvDlg::OnSysCommand(UINT nID, LPARAM lParam)
{
if ((nID & 0xFFF0) == IDM_ABOUTBOX)
{
CAboutDlg dlgAbout;
dlgAbout.DoModal();
}
else
{
CDialog::OnSysCommand(nID, lParam);
}
}
// If you add a minimize button to your dialog, you will need the code below
// to draw the icon. For MFC applications using the document/view model,
// this is automatically done for you by the framework.
void CFloatconvDlg::OnPaint()
{
if (IsIconic())
{
CPaintDC dc(this); // device context for painting
SendMessage(WM_ICONERASEBKGND, (WPARAM) dc.GetSafeHdc(), 0);
// Center icon in client rectangle
int cxIcon = GetSystemMetrics(SM_CXICON);
int cyIcon = GetSystemMetrics(SM_CYICON);
CRect rect;
GetClientRect(&rect);
int x = (rect.Width() - cxIcon + 1) / 2;
int y = (rect.Height() - cyIcon + 1) / 2;
// Draw the icon
dc.DrawIcon(x, y, m_hIcon);
}
else
{
CDialog::OnPaint();
}
}
// The system calls this to obtain the cursor to display while the user drags
// the minimized window.
HCURSOR CFloatconvDlg::OnQueryDragIcon()
{
return (HCURSOR) m_hIcon;
}
void CFloatconvDlg::OnB2f()
{
double mantissa=0;
int biased_exponent=0;
char *endstr;
BYTE Byte1, Byte2, Byte3, Byte4;
endstr = "\0"; // used by strtoul function
UpdateData(TRUE); // load user values
Byte1 = (BYTE)strtoul(m_Byte1Str, &endstr, 16);
Byte2 = (BYTE)strtoul(m_Byte2Str, &endstr, 16);
Byte3 = (BYTE)strtoul(m_Byte3Str, &endstr, 16);
Byte4 = (BYTE)strtoul(m_Byte4Str, &endstr, 16);
m_Note = "Note:";
// what format are we using?
switch (m_FloatFormat) {
case 0 : // Hitech 24bit (truncated IEEE 32bit, bias 127, but no Inf or NaN)
biased_exponent = ((Byte1 & 0x7F) << 1) + ((Byte2 & 0x80) >> 7);
m_Exp = biased_exponent - 127; // removing bias
// 15 is number of bits in mantissa, thus the 15 bit right shift
mantissa = ((double)(((Byte2 & 0x7F) << 8) + Byte3)) / pow(2, 15) + 1.0;
// sign bit set?
if (Byte1 & 0x80)
mantissa *= -1;
if ((Byte1 + Byte2 + Byte3) == 0)
{
// special case, all zeroes
m_Float = "0";
m_Mant.Format("%1.12G", mantissa);
m_Note = "Note: Special Case - All bytes are zero";
}
else
{
// output for user
m_Mant.Format("%1.12G", mantissa );
m_Float.Format("%1.12G", mantissa * pow(2.0, (double)m_Exp));
}
break;
case 1 : // IEEE754 32bit
biased_exponent = ((Byte1 & 0x7F) << 1) + ((Byte2 & 0x80) >> 7);
m_Exp = biased_exponent - 127; // removing bias
// 23 is number of bits in mantissa, thus the 23 bit right shift
mantissa = ((double)(((Byte2 & 0x7F) << 16) + (Byte3 << 8) + Byte4)) / pow(2, 23) + 1.0;
// sign bit set?
if (Byte1 & 0x80)
mantissa *= -1;
if ((Byte1 + Byte2 + Byte3 + Byte4) == 0)
{
// special case, all zeroes
m_Float = "0";
m_Mant.Format("%1.12G", mantissa);
m_Note = "Note: Special Case - All bytes are zero";
}
else if ((biased_exponent == 0xFF) && ((((Byte2 & 0x7F) << 16) + (Byte3 << 8) + Byte4) == 0x000000))
{
// this is also infinity
m_Note = "Note: Special Case - Infinity";
}
else if ((biased_exponent == 0xFF) && ((((Byte2 & 0x7F) << 16) + (Byte3 << 8) + Byte4) != 0x000000))
{
// not a number
m_Note = "Note: Special Case - Not A Number (NaN)";
}
else
{
// output for user
m_Mant.Format("%1.12G", mantissa );
m_Float.Format("%1.12G", mantissa * pow(2, m_Exp));
}
break;
case 2 : // Microchip 32Bit
biased_exponent = Byte1;
m_Exp = biased_exponent - 127; // removing bias
// 23 is number of bits in mantissa, thus the 23 bit right shift
mantissa = ((double)(((Byte2 & 0x7F) << 16) + (Byte3 << 8) + Byte4)) / pow(2, 23) + 1.0;
// sign bit set?
if (Byte2 & 0x80)
mantissa *= -1;
if ((Byte1 + Byte2 + Byte3 + Byte4) == 0)
{
// special case, all zeroes
m_Float = "0";
m_Mant.Format("%1.12G", mantissa);
m_Note = "Note: Special Case - All bytes are zero";
}
else
{
// output for user
m_Mant.Format("%1.12G", mantissa );
m_Float.Format("%1.12G", mantissa * pow(2, m_Exp));
}
break;
case 3 : // Microchip 24bit
biased_exponent = Byte1;
m_Exp = biased_exponent - 127; // removing bias
// 15 is number of bits in mantissa, thus the 15 bit right shift
mantissa = ((double)(((Byte2 & 0x7F) << 8) + Byte3)) / pow(2, 15) + 1.0;
// sign bit set?
if (Byte2 & 0x80)
mantissa *= -1;
if ((Byte1 + Byte2 + Byte3) == 0)
{
// special case, all zeroes
m_Float = "0";
m_Mant.Format("%1.12G", mantissa);
m_Note = "Note: Special Case - All bytes are zero";
}
else
{
// output for user
m_Mant.Format("%1.12G", mantissa );
m_Float.Format("%1.12G", mantissa * pow(2, m_Exp));
}
break;
default:
break;
} // switch (m_FloatFormat)
UpdateData(FALSE);
}
void CFloatconvDlg::OnF2b()
{
double x, z, UserFloat=0;
unsigned long mantissa=0;
int e, k;
char *endstr, sign;
BYTE Byte1, Byte2, Byte3, Byte4, be;
endstr = "\0"; // used by strtod function
UpdateData(TRUE); // load user values
UserFloat = strtod(m_Float, &endstr);
// remember sign and keep positive
if (UserFloat < 0)
{
sign = 1;
UserFloat *= -1;
}
else sign = 0;
// what format are we using?
switch (m_FloatFormat) {
case 0 : // Hitech 24bit
if (UserFloat == 0.0)
{
e = -127;
Byte1 = 0;
Byte2 = 0;
Byte3 = 0;
Byte4 = 0;
mantissa = 1.0;
m_Note = "Note: Special Case - Float is zero";
}
else
{
z = log(UserFloat) / log(2.0);
e = (int)(z);
if ((double)e > z)
e --;
be = e + 127;
x = UserFloat / pow(2.0, (double)e);
for (k=0; k>-15; k--)
{
if (x >= pow(2.0, k))
{
mantissa++; // set bit
x -= pow(2.0, k); // update remainder
}
mantissa = mantissa << 1;
}
// fill byte values
if (sign) Byte1 = 0x80;
else Byte1 = 0;
Byte1 += (be & 0xFE) >> 1;
Byte2 = (be & 0x01) << 7;
Byte2 += ((int)mantissa & 0x7F00) >> 8;
Byte3 = (int)mantissa & 0xFF;
Byte4 = 0;
m_Mant.Format("%1.12G", ((double)mantissa / pow(2.0, 15)));
}
break;
case 1 : // IEEE754 32Bit
if (UserFloat == 0.0)
{
e = -127;
Byte1 = 0;
Byte2 = 0;
Byte3 = 0;
Byte4 = 0;
mantissa = 1.0;
m_Note = "Note: Special Case - Float is zero";
}
else
{
z = log(UserFloat) / log(2.0);
e = (int)(z);
if ((double)e > z)
e --;
be = e + 127;
x = UserFloat / pow(2.0, (double)e);
for (k=0; k>-23; k--)
{
if (x >= pow(2.0, k))
{
mantissa++; // set bit
x -= pow(2.0, k); // update remainder
}
mantissa = mantissa << 1;
}
// fill byte values
if (sign) Byte1 = 0x80;
else Byte1 = 0;
Byte1 += (be & 0xFE) >> 1;
Byte2 = (be & 0x01) << 7;
Byte2 += ((int)mantissa & 0x7F0000) >> 16;
Byte3 = ((int)mantissa & 0xFF00) >> 8;
Byte4 = (int)mantissa & 0xFF;
m_Mant.Format("%1.12G", ((double)mantissa / pow(2.0, 23)));
}
break;
case 2 : // Microchip 32Bit
if (UserFloat == 0.0)
{
e = -127;
Byte1 = 0;
Byte2 = 0;
Byte3 = 0;
Byte4 = 0;
mantissa = 1.0;
m_Note = "Note: Special Case - Float is zero";
}
else
{
z = log(UserFloat) / log(2.0);
e = (int)(z);
if ((double)e > z)
e --;
be = e + 127;
x = UserFloat / pow(2.0, (double)e);
for (k=0; k>-23; k--)
{
if (x >= pow(2.0, k))
{
mantissa++; // set bit
x -= pow(2.0, k); // update remainder
}
mantissa = mantissa << 1;
}
// fill byte values
Byte1 = be;
if (sign) Byte2 = 0x80;
else Byte2 = 0;
Byte2 += ((int)mantissa & 0x7F0000) >> 16;
Byte3 = ((int)mantissa & 0xFF00) >> 8;
Byte4 = (int)mantissa & 0xFF;
m_Mant.Format("%1.12G", ((double)mantissa / pow(2.0, 23)));
}
break;
case 3 : // Microchip 24Bit
if (UserFloat == 0.0)
{
e = -127;
Byte1 = 0;
Byte2 = 0;
Byte3 = 0;
Byte4 = 0;
mantissa = 1.0;
m_Note = "Note: Special Case - Float is zero";
}
else
{
z = log(UserFloat) / log(2.0);
e = (int)(z);
if ((double)e > z)
e --;
be = e + 127;
x = UserFloat / pow(2.0, (double)e);
for (k=0; k>-15; k--)
{
if (x >= pow(2.0, k))
{
mantissa++; // set bit
x -= pow(2.0, k); // update remainder
}
mantissa = mantissa << 1;
}
// fill byte values
Byte1 = be;
if (sign) Byte2 = 0x80;
else Byte2 = 0;
Byte2 += ((int)mantissa & 0x7F00) >> 8;
Byte3 = (int)mantissa & 0xFF;
Byte4 = 0;
m_Mant.Format("%1.12G", ((double)mantissa / pow(2.0, 15)));
}
break;
}
m_Byte1Str.Format("%X", Byte1);
m_Byte2Str.Format("%X", Byte2);
m_Byte3Str.Format("%X", Byte3);
m_Byte4Str.Format("%X", Byte4);
m_Exp = e;
UpdateData(FALSE);
}
void CFloatconvDlg::OnMaxtextByte1()
{
// Switch focus to next edit box
// CWnd *editboxptr;
// editboxptr = GetDlgItem(IDC_FLOAT); LONG WAY
// GotoDlgCtrl(editboxptr);
NextDlgCtrl();
}
void CFloatconvDlg::OnHT24()
{
UpdateData(TRUE);
m_Info.LoadString(IDS_HITECH24);
m_Byte4Str = "0";
m_Byte4Control.SetReadOnly(TRUE);
UpdateData(FALSE);
}
void CFloatconvDlg::OnIEEE32()
{
UpdateData(TRUE);
m_Info.LoadString(IDS_IEEE32);
m_Byte4Control.SetReadOnly(FALSE);
UpdateData(FALSE);
}
void CFloatconvDlg::OnMCHIP24()
{
UpdateData(TRUE);
m_Info.LoadString(IDS_MCHIP24);
m_Byte4Str = "0";
m_Byte4Control.SetReadOnly(TRUE);
UpdateData(FALSE);
}
void CFloatconvDlg::OnMCHIP32()
{
UpdateData(TRUE);
m_Info.LoadString(IDS_MCHIP32);
m_Byte4Control.SetReadOnly(FALSE);
UpdateData(FALSE);
}
| file: /Techref/microchip/math/floatconv/floatconvDlg.cpp, 14KB, , updated: 2000/12/16 15:25, local time: 2024/12/27 20:36,
18.191.63.237:LOG IN
|
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