strcspn.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
*
*       strcspn.c                               Nucleus Common Library 1.1
*
* DESCRIPTION
*
*       This file contains the implementation of NCL_strcspn.
*
* DATA STRUCTURES
*
*       None.
*
* FUNCTIONS
*
*       NCL_strcspn
*
* DEPENDENCIES
*
*       ncl.h
*       string.h
*       nucleus.h
*
************************************************************************/

#define NU_NCL_SOURCE_FILE

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

/*************************************************************************
*
*   FUNCTION
*
*       NCL_strcspn
*
*   DESCRIPTION
*
*       This function looks for an initial set of characters from s1
*       that DON'T match ANY characters in s2.
*
*   INPUTS
*
*       s1                  String to be searched.
*       s1                  Characters that are NOT being sought after.
*
*   OUTPUTS
*
*       size_t              Number of characters in s1 that are not in s2.
*
*************************************************************************/

size_t NCL_strcspn(register const char *s1, register const char *s2)
{
    register size_t  n;
    register char c;
    register const char *p;

    for (n = 0; (c = *s1++) != 0; ++n)
    {
        p = s2;
        do
        {
            if (*p == c)
            {
                return n;                   /* return n if char found in s2 */
            }
        } while (*p++);
    }

    return n;
}