#ifndef NCBI_ANSI_EXT__H
#define NCBI_ANSI_EXT__H

/*  $Id: ncbi_ansi_ext.h,v 6.8 2000/11/07 21:19:35 vakatov Exp $
 * ===========================================================================
 *
 *                            PUBLIC DOMAIN NOTICE
 *               National Center for Biotechnology Information
 *
 *  This software/database is a "United States Government Work" under the
 *  terms of the United States Copyright Act.  It was written as part of
 *  the author's official duties as a United States Government employee and
 *  thus cannot be copyrighted.  This software/database is freely available
 *  to the public for use. The National Library of Medicine and the U.S.
 *  Government have not placed any restriction on its use or reproduction.
 *
 *  Although all reasonable efforts have been taken to ensure the accuracy
 *  and reliability of the software and data, the NLM and the U.S.
 *  Government do not and cannot warrant the performance or results that
 *  may be obtained by using this software or data. The NLM and the U.S.
 *  Government disclaim all warranties, express or implied, including
 *  warranties of performance, merchantability or fitness for any particular
 *  purpose.
 *
 *  Please cite the author in any work or product based on this material.
 *
 * ===========================================================================
 *
 * Author:  Anton Lavrentiev
 *
 * File Description:
 *    Non-ANSI, yet widely used functions
 *
 * --------------------------------------------------------------------------
 * $Log: ncbi_ansi_ext.h,v $
 * Revision 6.8  2000/11/07 21:19:35  vakatov
 * Compilation warning fixed;  plus, some code beautification...
 *
 * Revision 6.7  2000/10/18 21:15:19  lavr
 * strupr and strlwr added
 *
 * Revision 6.6  2000/10/06 16:39:22  lavr
 * <string.h> included and #defines now take care of functions declared
 * through macros (needed on Linux to prevent macro redefinitions)
 *
 * Revision 6.5  2000/10/05 21:26:07  lavr
 * ncbiconf.h removed
 *
 * Revision 6.4  2000/05/22 16:53:36  lavr
 * Minor change
 *
 * Revision 6.3  2000/05/17 18:51:28  vakatov
 * no HAVE_SIGACTION
 *
 * Revision 6.2  2000/05/17 16:09:57  lavr
 * Define prototypes of functions, usually defined but hidden in ANSI mode
 *
 * Revision 6.1  2000/05/15 19:03:07  lavr
 * Initial revision
 *
 * ==========================================================================
 */

#include <stddef.h>
#include <string.h>

#ifdef __cplusplus
extern "C" {
#endif


#ifdef strdup
#  undef strdup
#endif
#define strdup      NCBI_strdup

/* Create a copy of string "str".
 * Return an identical malloc'ed string, which must be explicitly freed 
 * by free() when no longer needed.
 */
extern char* strdup(const char* str);


#ifdef strcasecmp
#  undef strcasecmp
#  undef strncasecmp
#endif
#define strcasecmp  NCBI_strcasecmp
#define strncasecmp NCBI_strncasecmp

/* Compare "s1" and "s2", ignoring case.
 * Return less than, equal to or greater than zero if
 * "s1" is lexicographically less than, equal to or greater than "s2".
 */
extern int strcasecmp(const char* s1, const char* s2);

/* Compare not more than "n" characters of "s1" and "s2", ignoring case.
 * Return less than, equal to or greater than zero if
 * "s1" is lexicographically less than, equal to or greater than "s2".
 */
extern int strncasecmp(const char* s1, const char* s2, size_t n);


#ifdef strupr
#  undef strupr
#  undef strlwr
#endif
#define strupr NCBI_strupr
#define strlwr NCBI_strlwr

/* Convert a string to uppercase, then return pointer to
 * the altered string. Because the conversion is made in place, the
 * returned pointer is the same as the passed one.
 */
extern char* strupr(char* s);

/* Convert a string to lowercase, then return pointer to
 * the altered string. Because the conversion is made in place, the
 * returned pointer is the same as the passed one.
 */
extern char* strlwr(char* s);


#ifdef __cplusplus
} /* extern "C" */
#endif

#endif /* NCBI_ANSI_EXT__H */