flower/warn.cc

   1 /*
   2   warn.cc -- implement warnings
   3
   4   source file of the Flower Library
   5
   6   (c) 1997--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
   7 */
   8
   9 #include "warn.hh"
  10
  11 #include <cstdlib>
  12 #include <cstdio>
  13
  14 /* Is progress indication at NEWLINE?  */
  15 static bool progress_newline = true;
  16
  17 /* Display user information that is not a full message.  */
  18 void
  19 progress_indication (String s)
  20 {
  21   /* Test if all silly progress_indication ("\n") can be dropped now.  */
  22   if (s == "\n")
  23     return;
  24
  25   fputs (s.to_str0 (), stderr);
  26   fflush (stderr);
  27   if (s.length ())
  28     progress_newline = s[s.length () - 1] == '\n';
  29 }
  30
  31 /* Display a single user message.  Always starts on a new line.  */
  32 void
  33 message (String s)
  34 {
  35   if (!progress_newline)
  36     fputc ('\n', stderr);
  37   progress_indication (s);
  38 }
  39
  40 /* Display a warning message.  Always starts on a new line.  */
  41 void
  42 warning (String s)
  43 {
  44   message (_f ("warning: %s", s.to_str0 ()) + "\n");
  45 }
  46
  47 void
  48 non_fatal_error (String s)
  49 {
  50   message (_f ("error: %s", s.to_str0 ()) + "\n");
  51 }
  52
  53 /* Display an error message.  Always starts on a new line.  */
  54 void
  55 error (String s)
  56 {
  57   non_fatal_error (s);
  58   exit (1);
  59 }
  60
  61 void
  62 programming_error (String s)
  63 {
  64   message (_f ("programming error: %s", s) + "\n");
  65   message (_ ("continuing, cross fingers") + "\n");
  66 }
  67