/*

* 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;

}