release/src/router/libncurses/include/nc_string.h

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  28
  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 /*
  39  * $Id: nc_string.h,v 1.4 2013/12/15 01:09:19 tom Exp $
  40  *
  41  * String-hacks.  Use these macros to stifle warnings on (presumably) correct
  42  * uses of strcat, strcpy and sprintf.
  43  *
  44  * By the way -
  45  * A fundamental limitation of the interfaces (and frequent issue in bug
  46  * reports using these functions) is that sizes are passed as unsigned values
  47  * (with associated sign-extension problems), limiting their effectiveness
  48  * when checking for buffer overflow.
  49  */
  50
  51 #ifdef __cplusplus
  52 #define NCURSES_VOID            /* nothing */
  53 #else
  54 #define NCURSES_VOID (void)
  55 #endif
  56
  57 #if USE_STRING_HACKS && HAVE_STRLCAT
  58 #define _nc_STRCAT(d,s,n)       NCURSES_VOID strlcat((d),(s),NCURSES_CAST(size_t,n))
  59 #else
  60 #define _nc_STRCAT(d,s,n)       NCURSES_VOID strcat((d),(s))
  61 #endif
  62
  63 #if USE_STRING_HACKS && HAVE_STRLCPY
  64 #define _nc_STRCPY(d,s,n)       NCURSES_VOID strlcpy((d),(s),NCURSES_CAST(size_t,n))
  65 #else
  66 #define _nc_STRCPY(d,s,n)       NCURSES_VOID strcpy((d),(s))
  67 #endif
  68
  69 #if USE_STRING_HACKS && HAVE_SNPRINTF
  70 #define _nc_SPRINTF             NCURSES_VOID snprintf
  71 #define _nc_SLIMIT(n)           NCURSES_CAST(size_t,n),
  72 #else
  73 #define _nc_SPRINTF             NCURSES_VOID sprintf
  74 #define _nc_SLIMIT(n)           /* nothing */
  75 #endif
  76
  77 #endif /* STRING_HACKS_H */