Category : Windows 3.X Files
Archive : HEXCALC2.ZIP
Filename : HEXCALC2.C
Output of file : HEXCALC2.C contained in archive : HEXCALC2.ZIP
#include
#include
#include
#include
#include
#include "hexcalc2.h"
long FAR PASCAL WndProc(HWND, unsigned, WORD, LONG);
int PASCAL WinMain(hInstance, hPrevInstance, lpszCmdLine, nCmdShow)
HANDLE hInstance, hPrevInstance;
LPSTR lpszCmdLine;
int nCmdShow;
{
static char szAppName[] = "HexCalc";
HWND hWnd;
MSG msg;
WNDCLASS wndclass;
if (!hPrevInstance)
{
wndclass.style = CS_HREDRAW | CS_VREDRAW;
wndclass.lpfnWndProc = WndProc;
wndclass.cbClsExtra = 0;
wndclass.cbWndExtra = 0;
wndclass.hInstance = hInstance;
wndclass.hIcon = LoadIcon(hInstance, szAppName);
wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
wndclass.hbrBackground = COLOR_WINDOW + 1;
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = szAppName;
if (!RegisterClass(&wndclass))
return FALSE;
}
hWnd = CreateDialog(hInstance, szAppName, 0, NULL);
SendMessage(GetDlgItem(hWnd, IDB_DECIMAL), BM_SETCHECK, TRUE, 0l);
PostMessage(hWnd, WM_COMMAND, IDB_DECIMAL, 0l);
ShowWindow(hWnd, nCmdShow);
while (GetMessage(&msg, NULL, 0, 0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
}
void ShowNumber(hWnd, dwNumber)
HWND hWnd;
DWORD dwNumber;
{
char szBuffer[20];
SetDlgItemText(hWnd, VK_ESCAPE, strupr(ltoa(dwNumber, szBuffer, 16)));
SetDlgItemText(hWnd, '.' , ltoa(dwNumber, szBuffer, 10)) ;
}
DWORD CalcIt(dwFirstNum, nOperation, dwNum)
DWORD dwFirstNum, dwNum;
short nOperation;
{
switch(nOperation)
{
case '=' : return dwNum;
case '+' : return dwFirstNum + dwNum;
case '-' : return dwFirstNum - dwNum;
case '*' : return dwFirstNum * dwNum;
case '&' : return dwFirstNum & dwNum;
case '|' : return dwFirstNum | dwNum;
case '^' : return dwFirstNum ^ dwNum;
case '<' : return dwFirstNum << dwNum;
case '>' : return dwFirstNum >> dwNum;
case '/' : return dwNum ? dwFirstNum / dwNum : ULONG_MAX;
case '%' : return dwNum ? dwFirstNum % dwNum : ULONG_MAX;
default : return 0L;
}
}
long FAR PASCAL WndProc(hWnd, iMessage, wParam, lParam)
HWND hWnd;
unsigned iMessage;
WORD wParam;
LONG lParam;
{
static BOOL bNewNumber = TRUE;
static DWORD dwNumber, dwFirstNum;
static short n, nBase = 16, nOperation = '=';
HWND hButton;
switch(iMessage)
{
case WM_KEYDOWN:
if (wParam != VK_LEFT)
break;
wParam = VK_BACK;
case WM_CHAR:
if ((wParam = toupper(wParam)) == VK_RETURN)
wParam = '=';
if ((hButton = GetDlgItem(hWnd, wParam))
&& (IsWindowEnabled(hButton)))
{
SendMessage(hButton, BM_SETSTATE, 1, 0L);
SendMessage(hButton, BM_SETSTATE, 0, 0L);
}
else
{
MessageBeep(0);
break;
}
case WM_COMMAND:
SetFocus(hWnd);
if (wParam == VK_BACK)
ShowNumber(hWnd, dwNumber /= nBase);
else if (wParam == VK_ESCAPE || wParam == '.')
ShowNumber(hWnd, dwNumber = 0L);
else if (wParam == IDB_HEX)
{ nBase = 16;
for (n = 'A'; n <= 'F'; ++n)
EnableWindow(GetDlgItem(hWnd, n), TRUE);
}
else if (wParam == IDB_DECIMAL)
{ nBase = 10;
for (n = 'A'; n <= 'F'; ++n)
EnableWindow(GetDlgItem(hWnd, n), FALSE);
}
else if (isxdigit(wParam))
{
if (bNewNumber)
{
dwFirstNum = dwNumber;
dwNumber = 0L;
}
bNewNumber = FALSE;
if (dwNumber <= ULONG_MAX >> 4)
ShowNumber(hWnd, dwNumber = nBase * dwNumber +
wParam - (isdigit(wParam) ? '0' : 'A' - 10));
else
MessageBeep(0);
}
else
{
if (!bNewNumber)
ShowNumber(hWnd, dwNumber =
CalcIt(dwFirstNum, nOperation, dwNumber));
bNewNumber = TRUE;
nOperation = wParam;
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hWnd, iMessage, wParam, lParam);
}
return 0L;
}
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