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325 lines
9.7 KiB
325 lines
9.7 KiB
//+------------------------------------------------------------------
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//
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// File: culong.cxx
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//
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// Contents: implementation for CUlongCmdlineObj
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//
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// Synoposis: Encapsulates a command line switch which takes an
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// unsigned long value, eg: /maxusers:10
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//
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// Classes: CUlongCmdlineObj
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//
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// Functions:
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//
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// History: 06/15/92 DeanE Stolen from CIntCmdlineObj code
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// 07/29/92 davey Added nlsType and nlsLineArgType
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// 09/09/92 Lizch Changed SUCCESS to NO_ERROR
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// 09/18/92 Lizch Precompile headers
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// 11/14/92 DwightKr Updates for new version of NLS_STR
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// 10/14/93 DeanE Converted to NCHAR
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//
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//-------------------------------------------------------------------
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#include <comtpch.hxx>
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#pragma hdrstop
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#include <cmdlinew.hxx> // public cmdlinew stuff
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#include "_clw.hxx" // private cmdlinew stuff
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#include <ctype.h> // is functions
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INT StringToUlong(LPCNSTR pnszInt, ULONG *pUlong);
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LPCNSTR nszCmdlineUlong = _TEXTN("Takes an unsigned long ");
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LPCNSTR nszLineArgUlong = _TEXTN("<ulong> ");
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//+------------------------------------------------------------------
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//
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// Member: CUlongCmdlineObj destructor
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//
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// Synoposis: Frees any memory associated with the object
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//
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// History: Added to allow casting of pValue 05/12/92 Lizch
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// Integrated into CUlongCmdlineObj 6/15/92 DeanE
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//
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//-------------------------------------------------------------------
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CUlongCmdlineObj::~CUlongCmdlineObj()
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{
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delete (ULONG *)_pValue;
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_pValue = NULL;
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}
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//+------------------------------------------------------------------
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//
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// Member: CUlongCmdlineObj::SetValue, public
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//
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// Synposis: Stores the ulong value specified after the switch
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// string, eg. 10 for /maxusers:10
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//
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// Effects: This implementation for the virtual method SetValue
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// converts the characters following the switch to an unsigned
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// long. It allocates memory for the ulong.
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// If there is no equator character, or if there
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// is no character following the equator character, _pValue
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// remains NULL.
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//
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// Arguments: [nszArg] - the string following the switch on the
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// command line. Includes the equator (eg.
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// ':' or '=' ), if any.
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//
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// Returns: CMDLINE_NO_ERROR, CMDLINE_ERROR_OUT_OF_MEMORY,
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// CMDLINE_ERROR_TOO_BIG, CMDLINE_ERROR_INVALID_VALUE
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//
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// History: Created 12/27/91 Lizch
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// Converted to NLS_STR 4/17/92 Lizch
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// Integrated into CUlongCmdlineObj 6/15/92 DeanE
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//
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//-------------------------------------------------------------------
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INT CUlongCmdlineObj::SetValue(LPCNSTR nszArg)
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{
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INT iRC;
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// delete any existing _pValue
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delete (ULONG *)_pValue;
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_pValue = NULL;
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_pValue = new ULONG;
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if (_pValue == NULL)
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{
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return (CMDLINE_ERROR_OUT_OF_MEMORY);
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}
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// I'm using this rather than c runtime atol so that I
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// can detect error conditions like overflow and non-digits.
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iRC = StringToUlong(nszArg, (ULONG *)_pValue);
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if (iRC != CMDLINE_NO_ERROR)
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{
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delete (ULONG *)_pValue;
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_pValue = NULL;
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}
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return(iRC);
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}
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//+------------------------------------------------------------------
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//
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// Member: CUlongCmdlineObj::GetValue, public
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//
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// Synposis: Returns a pointer to ULONG that holds the value.
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//
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// Arguments: void
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//
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// Returns: ULONG value at *_pValue.
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//
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// History: Created 12/27/91 Lizch
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// Converted to NLS_STR 4/17/92 Lizch
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// Integrated into CUlongCmdlineObj 6/15/92 DeanE
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//
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//-------------------------------------------------------------------
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const ULONG *CUlongCmdlineObj::GetValue()
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{
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return((ULONG *)_pValue);
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}
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//+------------------------------------------------------------------
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//
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// Member: CUlongCmdlineObj::DisplayValue, public
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//
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// Synoposis: Prints the stored command line value accordint to
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// current display method. Generally this will be to stdout.
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//
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// History: Created 12/27/91 Lizch
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// Converted to NLS_STR 4/17/92 Lizch
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// Integrated into CUlongCmdlineObj 6/15/92 DeanE
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//
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//-------------------------------------------------------------------
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void CUlongCmdlineObj::DisplayValue()
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{
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if (_pValue != NULL)
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{
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_sNprintf(_nszErrorBuf,
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_TEXTN("Command line switch %s has value %lu\n"),
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_pnszSwitch,
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*(ULONG *)_pValue);
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(*_pfnDisplay)(_nszErrorBuf);
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}
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else
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{
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DisplayNoValue();
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}
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}
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//+------------------------------------------------------------------
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//
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// Function: StringToUlong
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//
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// Synoposis: Converts given string to unsigned long, checking for
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// overflow and illegal characters. Only +, - and digits
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// are accepted.
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//
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// Arguments: [nszUlong] - string to convert
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// [pUlong] - pointer to converted unsigned long
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//
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// Returns: CMDLINE_NO_ERROR, CMDLINE_ERROR_INVALID_VALUE,
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// CMDLINE_ERROR_TOO_BIG
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//
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// History: Created 12/17/91 Lizch
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// Converted to AsciiToUlong 6/15/92 DeanE
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// Added in conversion of Hex 12/27/94 DaveY
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//
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// Notes: I'm using this rather than c runtime atoi so that I
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// can detect error conditions like overflow and non-digits.
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// The sign is checked for and stored, although it is not
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// used - so a negative value will still be converted to
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// an unsigned equivalent.
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//
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//-------------------------------------------------------------------
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INT StringToUlong(LPCNSTR nszUlong, ULONG *pUlong)
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{
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short sNegator = 1;
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ULONG ulResult = 0;
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INT iRC = CMDLINE_NO_ERROR;
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// Skip any leading spaces - these can occur if the command line
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// switch incorporates spaces, eg "/a: 123"
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//
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while (_isnspace(*nszUlong))
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{
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nszUlong++;
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}
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// Get sign - ignore for now
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switch (*nszUlong)
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{
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case '-':
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sNegator = -1;
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nszUlong++;
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break;
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case '+':
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sNegator = 1;
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nszUlong++;
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break;
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default:
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break;
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}
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// see if using hex values
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if ((*nszUlong == _TEXTN('0')) &&
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((*(nszUlong+1) == _TEXTN('x')) || (*(nszUlong+1) == _TEXTN('X'))))
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{
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nszUlong += 2; // pass the "0x"
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int max = sizeof(ULONG) << 1; // number of hex digits possible
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for(int i=0; *nszUlong != NULL && i < max; i++, nszUlong++)
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{
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if ((_TEXTN('0') <= *nszUlong ) && (*nszUlong <= _TEXTN('9')))
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{
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ulResult = ulResult * 16 + (*nszUlong - _TEXTN('0'));
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}
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else if ((_TEXTN('A') <= *nszUlong ) && (*nszUlong <= _TEXTN('F')))
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{
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ulResult = ulResult * 16 + 10 + (*nszUlong - _TEXTN('A'));
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}
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else if ((_TEXTN('a') <= *nszUlong) && (*nszUlong <= _TEXTN('f')))
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{
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ulResult = ulResult * 16 + 10 + (*nszUlong - _TEXTN('a'));
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}
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else
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{
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iRC = CMDLINE_ERROR_INVALID_VALUE;
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ulResult = 0;
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break;
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}
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}
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if ((i >= max) && (*nszUlong != NULL))
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{
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iRC = CMDLINE_ERROR_INVALID_VALUE;
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ulResult = 0;
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}
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*pUlong = ulResult;
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return iRC;
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}
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// must be decimal
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for (;*nszUlong != L'\0'; nszUlong++)
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{
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if (!_isndigit(*nszUlong))
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{
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ulResult = 0;
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iRC = CMDLINE_ERROR_INVALID_VALUE;
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break;
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}
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ULONG ulPrevious = ulResult;
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ulResult = (ulResult * 10) + (*nszUlong - '0');
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// Check for overflow by checking that the previous result is less
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// than the current result - if the previous one was bigger, we've
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// overflowed!
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//
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if (ulResult < ulPrevious)
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{
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ulResult = 0;
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iRC = CMDLINE_ERROR_TOO_BIG;
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break;
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}
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}
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*pUlong = ulResult;
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return(iRC);
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}
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//+-------------------------------------------------------------------
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//
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// Method: CUlongCmdlineObj::QueryCmdlineType, protected, const
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//
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// Synoposis: returns a character pointer to the cmdline type.
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//
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// Arguments: None.
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//
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// Returns: const NCHAR pointer to string.
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//
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// History: 28-Jul-92 davey Created.
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//
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//--------------------------------------------------------------------
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LPCNSTR CUlongCmdlineObj::QueryCmdlineType() const
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{
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return(nszCmdlineUlong);
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}
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//+-------------------------------------------------------------------
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//
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// Method: CUlongCmdlineObj::QueryLineArgType, protected, const
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//
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// Synoposis: returns a character pointer to the line arg type.
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//
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// Arguments: None.
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//
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// Returns: const NLS_STR reference to string.
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//
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// History: 28-Jul-92 davey Created.
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//
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//--------------------------------------------------------------------
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LPCNSTR CUlongCmdlineObj::QueryLineArgType() const
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{
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// if user has not defined one then give default one
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if (_pnszLineArgType == NULL)
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{
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return(nszLineArgUlong);
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}
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else
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{
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return(_pnszLineArgType);
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}
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}
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