strncat.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
*
*       strncat.c                           Nucleus Common Library 1.1
*
* DESCRIPTION
*
*       This file contains the implementation of NCL_strncat.
*
* DATA STRUCTURES
*
*       None.
*
* FUNCTIONS
*
*       NCL_strncat
*
* 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_strncat
*
*   DESCRIPTION
*
*       Append a copy of s2 to the end of s1, but make sure that at most
*       n characters are copied.
*
*   INPUTS
*
*       s1                  String in the front
*       s2                  String to be appended to s1 (in the back)
*       n                   The most chars that will be copied.
*
*   OUTPUTS
*
*       char*               Pointer to the null-terminated result
*
*************************************************************************/

char *NCL_strncat(register char *s1, register const char *s2,
                   register size_t n)
{
    register char *p = s1;

    while (*s1++);

    for (--s1; (n-- > 0) && ((*s1++ = *s2++) != 0););

    if (s1[-1])
        *s1 = 0;

    return p;
}