ncurses/lib_tracechr.c

   1
   2 /***************************************************************************
   3 *                            COPYRIGHT NOTICE                              *
   4 ****************************************************************************
   5 *                ncurses is copyright (C) 1992-1995                        *
   6 *                          Zeyd M. Ben-Halim                               *
   7 *                          zmbenhal@netcom.com                             *
   8 *                          Eric S. Raymond                                 *
   9 *                          esr@snark.thyrsus.com                           *
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  21
  22
  23
  24 /*
  25  *      lib_tracechr.c - Tracing/Debugging routines
  26  */
  27
  28 #ifndef TRACE
  29 #define TRACE                   /* turn on internal defs for this module */
  30 #endif
  31
  32 #include <curses.priv.h>
  33
  34 #include <ctype.h>
  35
  36 char *_tracechar(const unsigned char ch)
  37 {
  38     static char crep[20];
  39     /*
  40      * We can show the actual character if it's either an ordinary printable
  41      * or one of the high-half characters.
  42      */
  43     if (isprint(ch) || (ch & 0x80))
  44     {
  45         crep[0] = '\'';
  46         crep[1] = ch;   /* necessary; printf tries too hard on metachars */
  47         (void) sprintf(crep + 2, "' = 0x%02x", (unsigned)ch);
  48     }
  49     else
  50         (void) sprintf(crep, "0x%02x", (unsigned)ch);
  51     return(crep);
  52 }