strtol.c

Nucleus Common Library for Integrator using ARM Developer Suite

/*************************************************************************
*
*               Copyright Mentor Graphics Corporation 2002
*                         All Rights Reserved.
*
* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS
* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS
* SUBJECT TO LICENSE TERMS.
*
*************************************************************************/

/*************************************************************************
* FILE NAME                                     VERSION
*
*       strtol.c                                Nucleus Common Library 1.1
*
* DESCRIPTION
*
*       This file contains the implementation of NCL_strol.
*
* DATA STRUCTURES
*
*       None.
*
* FUNCTIONS
*
*       NCL_strol
*
* DEPENDENCIES
*
*       ncl.h
*       convert.h
*       ctype.h
*       nucleus.h
*
************************************************************************/

#define NU_NCL_SOURCE_FILE

#include "ncl\inc\ncl.h"
#include "ncl\inc\convert.h"
#include "ncl\inc\ctype.h"
#include "plus\nucleus.h"                                /* MMU Support */

/*************************************************************************
*
*   FUNCTION
*
*       NCL_strtol
*
*   DESCRIPTION
*
*       This routine scans a string for a long integer.  The integer may
*       be preceeded by optional whitespace characters, and by a single '+'
*       or '-' sign.  The integer is in the base specified (from 2 to 36).
*       If "base" is 0, then the integer is octal or hexadecimal if
*       preceeded by a '0' or a '0x', otherwise, it defaults to decimal.
*       A hexadecimal number may optionally be preceeded by "0x".
*       If "endptr" is non-zero, it is set to point to the first invalid
*       character found after the integer, or to nptr if a valid integer
*       can't be scanned from the string.
*
*   INPUTS
*
*       nptr                The start of the string to be processed
*       base                The number system to use (binary, hex, etc...)
*
*   OUTPUTS
*
*       endptr              The first valid character after the integer
*                             (passed by reference)
*       long                The unsigned long number represented by the
*                             string
*
*************************************************************************/

long NCL_strtol (const char *nptr, char **endptr, int base)
{
    register const uchar *ptr = (const uchar *)nptr;
    long  value;

    while (NCL_isspace(*ptr))
        ++ptr;                                  /* skip over whitespace */

    value = NCL__strtol((const char*)ptr, endptr, base, -1);

    if (endptr != (char**)0)              /* indicate error if needed */
      if (*endptr == (char*)ptr)
          *endptr = (char *)nptr;

    return (value);
}