141 lines
3.3 KiB
C++
141 lines
3.3 KiB
C++
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//+----------------------------------------------------------------------------
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//
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// File: atol.cpp (from libc atox.c)
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//
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// Module: CMUTIL.DLL
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//
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// Synopsis: Conversion routines
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//
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// Copyright (c) 1997-1999 Microsoft Corporation
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//
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// Author: henryt Created 03/01/98
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//
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//+----------------------------------------------------------------------------
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#include "cmmaster.h"
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//+----------------------------------------------------------------------------
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//
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// Function: WINAPI CmAtolW
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//
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// Synopsis: This function converts a Unicode string to a long
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//
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// Arguments: *nptr - Unicode string to convert
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//
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// Returns: LONG - long representation of the string passed in
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//
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// History: quintinb Rewrote for Unicode conversion 4/8/99
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//
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//+----------------------------------------------------------------------------
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CMUTILAPI LONG WINAPI CmAtolW(const WCHAR *nptr)
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{
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WCHAR* pszCurrent = (WCHAR*)nptr;
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WCHAR sign = L'\0'; // if '-', then negative, otherwise positive
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long total = 0; // current total
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MYDBGASSERT(nptr);
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if (nptr)
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{
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//
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// skip whitespace
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//
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while (CmIsSpaceW(pszCurrent))
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{
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pszCurrent = CharNextU(pszCurrent);
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}
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//
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// Save the sign if necessary
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//
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sign = *pszCurrent;
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if ((L'-' == sign) || (L'+' == sign))
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{
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pszCurrent = CharNextU(pszCurrent);
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}
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//
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// Construct the number
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//
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total = 0;
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while (CmIsDigitW(pszCurrent))
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{
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total = (10 * total) + (*pszCurrent - L'0'); // accumulate digit
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pszCurrent = CharNextU(pszCurrent); // get next char
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}
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}
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if (sign == L'-')
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{
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return -total;
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}
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else
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{
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return total; // return result, negated if necessary
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}
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}
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//+----------------------------------------------------------------------------
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//
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// Function: WINAPI CmAtolA
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//
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// Synopsis: This function converts an ANSI string to a long value
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//
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// Arguments: *nptr - string to convert
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//
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// Returns: LONG - long representation of the string passed in
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//
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// History: quintinb Rewrote for Unicode conversion 4/8/99
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//
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//+----------------------------------------------------------------------------
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CMUTILAPI LONG WINAPI CmAtolA(const CHAR *nptr)
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{
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CHAR* pszCurrent = (CHAR*)nptr;
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CHAR sign = '\0'; // if '-', then negative, otherwise positive
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long total = 0; // current total
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MYDBGASSERT(nptr);
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if (nptr)
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{
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//
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// skip whitespace
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//
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while (CmIsSpaceA(pszCurrent))
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{
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pszCurrent = CharNextA(pszCurrent);
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}
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//
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// Save the sign if necessary
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//
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sign = *pszCurrent;
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if (('-' == sign) || ('+' == sign))
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{
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pszCurrent = CharNextA(pszCurrent);
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}
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//
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// Construct the number
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//
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total = 0;
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while (CmIsDigitA(pszCurrent))
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{
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total = (10 * total) + (*pszCurrent - '0'); // accumulate digit
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pszCurrent = CharNextA(pszCurrent); // get next char
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}
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}
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if (sign == '-')
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{
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return -total;
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}
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else
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{
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return total; // return result, negated if necessary
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}
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}
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