windows-server-2003/shell/cpls/poscpl/util.c

/*
 *  UTIL.C
 *
 *		Point-of-Sale Control Panel Applet
 *
 *      Author:  Ervin Peretz
 *
 *      (c) 2001 Microsoft Corporation 
 */

#include <windows.h>
#include <windowsx.h>
#include <commctrl.h>
#include <cpl.h>

#include <setupapi.h>
#include <hidsdi.h>

#include "internal.h"
#include "res.h"
#include "debug.h"



/*
 *  WStrNCpy
 *
 *      Like wcsncpy, but terminates the string if truncated.
 *      Also, tolerates NULL src string.
 */
ULONG WStrNCpy(WCHAR *dest, const WCHAR *src, ULONG maxWChars)
{
    ULONG wCharsWritten = 0;

    ASSERT(dest);

    if (src){
        while ((maxWChars-- > 1) && (*dest++ = *src++)){
            wCharsWritten++;
        }
        if (maxWChars == 1){
            *dest = L'\0';
            wCharsWritten++;
        }
    }
    else {
        *dest = L'\0';
        wCharsWritten++;
    }

    return wCharsWritten;
}


/*
 *  AsciiToWChar
 *
 *      Like mbstowcs, but terminates the string if truncated.
 *      Also, tolerates NULL ascii string.
 */
ULONG AsciiToWChar(WCHAR *dest, const char *src, ULONG maxChars)
{
    ULONG charsWritten = 0;

    if (src){
        while ((maxChars-- > 1) && (*dest++ = (WCHAR)*src++)){
            charsWritten++;
        }
        if (maxChars == 1){
            *dest = (WCHAR)NULL;
            charsWritten++;
        }
    }
    else {
        *dest = (WCHAR)NULL;
        charsWritten++;
    }

    return charsWritten;
}


VOID IntToWChar(WCHAR *buf, DWORD x)
{
	int i;
	WCHAR tmpbuf[11] = {0};

    if (x){
	    for (i = 10; x && (i >= 0); i--){
		    tmpbuf[i] = (WCHAR)(L'0' + (x % 10));
		    x /= 10;
	    }

	    WStrNCpy(buf, &tmpbuf[i+1], 11);
    }
    else {
        WStrNCpy(buf, L"0", 2);
    }
}


VOID HexToWChar(WCHAR *buf, DWORD x)
{
	int i;
	WCHAR tmpbuf[9] = {0};

    if (x){
	    for (i = 7; x && (i >= 0); i--){
            ULONG nibble = (x % 16);
            if (nibble < 10){
		        tmpbuf[i] = (WCHAR)(L'0' + nibble);
            }
            else {
                tmpbuf[i] = (WCHAR)(L'A' + nibble - 10);
            }
		    x /= 16;
	    }

	    WStrNCpy(buf, &tmpbuf[i+1], 9);
    }
    else {
        WStrNCpy(buf, L"0", 2);
    }
}