strspn.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
*
*       strspn.c                                Nucleus Common Library 1.1
*
* DESCRIPTION
*
*       This file contains the implementation of NCL_strspn.
*
* DATA STRUCTURES
*
*       None.
*
* FUNCTIONS
*
*       NCL_strspn
*
* 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_strspn
*
*   DESCRIPTION
*
*       It looks for an initial set of characters from s1 that match ANY
*       character in s2.
*
*   INPUTS
*
*       s1                  String to search within
*       s2                  Characters to search for
*
*   OUTPUTS
*
*       *size_t
*
*************************************************************************/

size_t NCL_strspn(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)
                goto eol;                /* leave loop is char is found */
        } while (*p++);

        break;                            /* return n if char not found */
eol:    ;
    }

    return n;
}