contrib/ncurses/include/nc_string.h

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  29 /****************************************************************************
  30  *  Author: Thomas E. Dickey                        2012                    *
  31  ****************************************************************************/
  32
  33 #ifndef STRING_HACKS_H
  34 #define STRING_HACKS_H 1
  35
  36 #include <ncurses_cfg.h>
  37
  38 #if HAVE_BSD_STRING_H
  39 #include <bsd/string.h>
  40 #endif
  41
  42 /*
  43  * $Id: nc_string.h,v 1.7 2016/09/10 19:57:15 tom Exp $
  44  *
  45  * String-hacks.  Use these macros to stifle warnings on (presumably) correct
  46  * uses of strcat, strcpy and sprintf.
  47  *
  48  * By the way -
  49  * A fundamental limitation of the interfaces (and frequent issue in bug
  50  * reports using these functions) is that sizes are passed as unsigned values
  51  * (with associated sign-extension problems), limiting their effectiveness
  52  * when checking for buffer overflow.
  53  */
  54
  55 #ifdef __cplusplus
  56 #define NCURSES_VOID            /* nothing */
  57 #else
  58 #define NCURSES_VOID (void)
  59 #endif
  60
  61 #if USE_STRING_HACKS && HAVE_STRLCAT
  62 #define _nc_STRCAT(d,s,n)       NCURSES_VOID strlcat((d),(s),NCURSES_CAST(size_t,n))
  63 #define _nc_STRNCAT(d,s,m,n)    NCURSES_VOID strlcat((d),(s),NCURSES_CAST(size_t,m))
  64 #else
  65 #define _nc_STRCAT(d,s,n)       NCURSES_VOID strcat((d),(s))
  66 #define _nc_STRNCAT(d,s,m,n)    NCURSES_VOID strncat((d),(s),(n))
  67 #endif
  68
  69 #if USE_STRING_HACKS && HAVE_STRLCPY
  70 #define _nc_STRCPY(d,s,n)       NCURSES_VOID strlcpy((d),(s),NCURSES_CAST(size_t,n))
  71 #define _nc_STRNCPY(d,s,n)      NCURSES_VOID strlcpy((d),(s),NCURSES_CAST(size_t,n))
  72 #else
  73 #define _nc_STRCPY(d,s,n)       NCURSES_VOID strcpy((d),(s))
  74 #define _nc_STRNCPY(d,s,n)      NCURSES_VOID strncpy((d),(s),(n))
  75 #endif
  76
  77 #if USE_STRING_HACKS && HAVE_SNPRINTF
  78 #define _nc_SPRINTF             NCURSES_VOID snprintf
  79 #define _nc_SLIMIT(n)           NCURSES_CAST(size_t,n),
  80 #else
  81 #define _nc_SPRINTF             NCURSES_VOID sprintf
  82 #define _nc_SLIMIT(n)           /* nothing */
  83 #endif
  84
  85 #endif /* STRING_HACKS_H */