129 lines
3.2 KiB
C++
129 lines
3.2 KiB
C++
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//+---------------------------------------------------------------------------
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//
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// Copyright (C) 1996, Microsoft Corporation.
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//
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// File: xtow.cxx
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//
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// Contents: formats numbers into wide strings
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//
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// History: 96/Jan/3 DwightKr Created
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// 96/Apr/3 dlee optimized and cleaned up
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//
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//----------------------------------------------------------------------------
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#include <pch.cxx>
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#pragma hdrstop
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//+---------------------------------------------------------------------------
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//
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// Note - added to C run-times; remove when new run-times are available.
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// On second thought, just use this one -- it saves an ascii=>wide and
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// radix checking.
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// This routine isn't for real formatting -- it's just for input to
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// Win32's real number formatting routine
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//
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//----------------------------------------------------------------------------
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//+---------------------------------------------------------------------------
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//
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// Function: IDQ_ulltow_format
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//
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// Synopsis: formats an _int64 in a wide string.
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//
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// Arguments: [val] - value to format
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// [buf] - buffer for the result
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// [fIsNegative] - true if val is negative, false otherwise
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//
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// History: 96/Apr/05 dlee Created.
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//
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//----------------------------------------------------------------------------
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void IDQ_ulltow_format(
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ULONGLONG val,
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WCHAR * buf,
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int fIsNegative )
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{
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WCHAR *p = buf;
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if ( fIsNegative )
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{
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// negative, so output '-' and negate
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*p++ = L'-';
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val = (ULONGLONG) (-(LONGLONG)val);
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}
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WCHAR *firstdig = p; // save pointer to first digit
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do
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{
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unsigned digval = (unsigned) (val % 10);
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val /= 10; // get next digit
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Win4Assert( digval <= 9 );
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// convert to unicode and store
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*p++ = (WCHAR) (digval + L'0');
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} while ( val > 0 );
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// We now have the digit of the number in the buffer, but in reverse
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// order. Thus we reverse them now.
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*p-- = 0;
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do
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{
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WCHAR temp = *p;
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*p = *firstdig;
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*firstdig = temp; // swap *p and *firstdig
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--p;
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++firstdig; // advance to next two digits
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} while ( firstdig < p ); // repeat until halfway
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}
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void IDQ_ultow_format(
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ULONG val,
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WCHAR * buf,
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int fIsNegative )
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{
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WCHAR *p = buf;
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if ( fIsNegative )
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{
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// negative, so output '-' and negate
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*p++ = L'-';
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val = (ULONG) (-(LONG)val);
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}
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WCHAR *firstdig = p; // save pointer to first digit
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do
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{
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unsigned digval = (unsigned) (val % 10);
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val /= 10; // get next digit
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Win4Assert( digval <= 9 );
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// convert to unicode and store
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*p++ = (WCHAR) (digval + L'0');
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} while ( val > 0 );
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// We now have the digit of the number in the buffer, but in reverse
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// order. Thus we reverse them now.
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*p-- = 0;
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do
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{
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WCHAR temp = *p;
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*p = *firstdig;
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*firstdig = temp; // swap *p and *firstdig
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--p;
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++firstdig; // advance to next two digits
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} while ( firstdig < p ); // repeat until halfway
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}
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