githubmirror/ncurses

include/nc_string.h
77 строк4 KB
Thomas E. Dickey
ncurses 5.9 - patch 20131214
15 дек 2013, 06:33
15 дек 2013, 06:33cc387b1
/****************************************************************************
 * Copyright (c) 2012,2013 Free Software Foundation, Inc.                   *
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 ****************************************************************************/

/****************************************************************************
 *  Author: Thomas E. Dickey                        2012                    *
 ****************************************************************************/

#ifndef STRING_HACKS_H
#define STRING_HACKS_H 1

#include <ncurses_cfg.h>

/*
 * $Id: nc_string.h,v 1.4 2013/12/15 01:09:19 tom Exp $
 *
 * String-hacks.  Use these macros to stifle warnings on (presumably) correct
 * uses of strcat, strcpy and sprintf.
 *
 * By the way -
 * A fundamental limitation of the interfaces (and frequent issue in bug
 * reports using these functions) is that sizes are passed as unsigned values
 * (with associated sign-extension problems), limiting their effectiveness
 * when checking for buffer overflow.
 */

#ifdef __cplusplus
#define NCURSES_VOID		/* nothing */
#else
#define NCURSES_VOID (void)
#endif

#if USE_STRING_HACKS && HAVE_STRLCAT
#define _nc_STRCAT(d,s,n)	NCURSES_VOID strlcat((d),(s),NCURSES_CAST(size_t,n))
#else
#define _nc_STRCAT(d,s,n)	NCURSES_VOID strcat((d),(s))
#endif

#if USE_STRING_HACKS && HAVE_STRLCPY
#define _nc_STRCPY(d,s,n)	NCURSES_VOID strlcpy((d),(s),NCURSES_CAST(size_t,n))
#else
#define _nc_STRCPY(d,s,n)	NCURSES_VOID strcpy((d),(s))
#endif

#if USE_STRING_HACKS && HAVE_SNPRINTF
#define _nc_SPRINTF             NCURSES_VOID snprintf
#define _nc_SLIMIT(n)           NCURSES_CAST(size_t,n),
#else
#define _nc_SPRINTF             NCURSES_VOID sprintf
#define _nc_SLIMIT(n)		/* nothing */
#endif

#endif /* STRING_HACKS_H */