src/complain.c

   1 /* Declaration for error-reporting function for Bison.
   2
   3    Copyright (C) 2000, 2001, 2002, 2004, 2005, 2006
   4    Free Software Foundation, Inc.
   5
   6    This program is free software; you can redistribute it and/or modify it
   7    under the terms of the GNU General Public License as published by the
   8    Free Software Foundation; either version 2, or (at your option) any
   9    later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, write to the Free Software
  18    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19    USA.  */
  20
  21 /* Based on error.c and error.h,
  22    written by David MacKenzie <djm@gnu.ai.mit.edu>.  */
  23
  24 #include <config.h>
  25 #include "system.h"
  26
  27 #include <stdarg.h>
  28
  29 #include "complain.h"
  30 #include "files.h"
  31
  32 /* The calling program should define program_name and set it to the
  33    name of the executing program.  */
  34 extern char *program_name;
  35
  36 bool complaint_issued;
  37
  38 \f
  39
  40 /** Report an error message.
  41  *
  42  * \param loc     the location, defaulting to the current file,
  43  *                or the program name.
  44  * \param prefix  put before the message (e.g., "warning").
  45  * \param message the error message, a printf format string.
  46  * \param args    the arguments of the format string.
  47  */
  48 static
  49 void
  50 error_message (location *loc,
  51                const char *prefix,
  52                const char *message, va_list args)
  53 {
  54   if (loc)
  55     location_print (stderr, *loc);
  56   else
  57     fputs (current_file ? current_file : program_name, stderr);
  58   fputs (": ", stderr);
  59
  60   if (prefix)
  61     fprintf (stderr, "%s: ", prefix);
  62
  63   vfprintf (stderr, message, args);
  64   va_end (args);
  65   putc ('\n', stderr);
  66   fflush (stderr);
  67 }
  68
  69 /** Wrap error_message() with varargs handling. */
  70 #define ERROR_MESSAGE(Loc, Prefix, Message)     \
  71 {                                               \
  72   va_list args;                                 \
  73   va_start (args, Message);                     \
  74   error_message (Loc, Prefix, Message, args);   \
  75 }
  76
  77
  78 /*--------------------------------.
  79 | Report a warning, and proceed.  |
  80 `--------------------------------*/
  81
  82 void
  83 warn_at (location loc, const char *message, ...)
  84 {
  85   ERROR_MESSAGE (&loc, _("warning"), message);
  86 }
  87
  88 void
  89 warn (const char *message, ...)
  90 {
  91   ERROR_MESSAGE (NULL, _("warning"), message);
  92 }
  93
  94
  95 /*-----------------------------------------------------------.
  96 | An error has occurred, but we can proceed, and die later.  |
  97 `-----------------------------------------------------------*/
  98
  99 void
 100 complain_at (location loc, const char *message, ...)
 101 {
 102   ERROR_MESSAGE (&loc, NULL, message);
 103   complaint_issued = true;
 104 }
 105
 106 void
 107 complain (const char *message, ...)
 108 {
 109   ERROR_MESSAGE (NULL, NULL, message);
 110   complaint_issued = true;
 111 }
 112
 113
 114 /*-------------------------------------------------.
 115 | A severe error has occurred, we cannot proceed.  |
 116 `-------------------------------------------------*/
 117
 118 void
 119 fatal_at (location loc, const char *message, ...)
 120 {
 121   ERROR_MESSAGE (&loc, _("fatal error"), message);
 122   exit (EXIT_FAILURE);
 123 }
 124
 125 void
 126 fatal (const char *message, ...)
 127 {
 128   ERROR_MESSAGE (NULL, _("fatal error"), message);
 129   exit (EXIT_FAILURE);
 130 }