/*

 * Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description:

 * FUNCTION

 * <<strstr>>---find string segment

 * INDEX

 * strstr

 * ANSI_SYNOPSIS

 * #include <string.h>

 * char *strstr(const char *<[s1]>, const char *<[s2]>);

 * TRAD_SYNOPSIS

 * #include <string.h>

 * char *strstr(<[s1]>, <[s2]>)

 * char *<[s1]>;

 * char *<[s2]>;

 * Locates the first occurence in the string pointed to by <[s1]> of

 * the sequence of characters in the string pointed to by <[s2]>

 * (excluding the terminating null  character).

 * RETURNS

 * Returns a pointer to the located string segment, or a null

 * pointer if the string <[s2]> is not found. If <[s2]> points to

 * a string with zero length, the <[s1]> is returned.

 * PORTABILITY

 * <<strstr>> is ANSI C.

 * <<strstr>> requires no supporting OS subroutines.

 * QUICKREF

 * strstr ansi pure

 * 

 *

 */

 #include <string.h>

 /**

 Find substring.

 Scans string1 for the first occurrence of string2.

 The search does not include terminating null-characters.

 @return A pointer to the first occurrence of lookfor in searchee.

 If lookfor is not found in searchee the function returns NULL.

 @param searchee Null-terminated string to search. 

 @param lookfor Null-terminated string containing the substring to search for.

 */

 EXPORT_C char *

 strstr (const char *searchee, const char *lookfor)

 {

   if (*searchee == 0)

     {

       if (*lookfor)

 	return (char *) NULL;

       return (char *) searchee;

     }

   while (*searchee)

     {

       size_t i;

       i = 0;

       for (;;)

 	{

 	  if (lookfor[i] == 0)

 	    {

 	      return (char *) searchee;

 	    }

 	  if (lookfor[i] != searchee[i])

 	    {

 	      break;

 	    }

 	  i++;

 	}

       searchee++;

     }

   return (char *) NULL;

 }