src/complain.c

   1 /* Declaration for error-reporting function for Bison.
   2    Copyright (C) 2000, 2001, 2002  Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify it
   5    under the terms of the GNU General Public License as published by the
   6    Free Software Foundation; either version 2, or (at your option) any
   7    later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software
  16    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
  17    USA.  */
  18
  19 /* Based on error.c and error.h,
  20    written by David MacKenzie <djm@gnu.ai.mit.edu>.  */
  21
  22 #include "system.h"
  23
  24 #include <stdarg.h>
  25 #if ! (HAVE_VPRINTF || defined vfprintf)
  26 # define vfprintf(stream, message, args) _doprnt (message, args, stream)
  27 #endif
  28
  29 #if STDC_HEADERS || _LIBC
  30 # include <stdlib.h>
  31 # include <string.h>
  32 #endif
  33
  34 #include "complain.h"
  35
  36 #ifndef _
  37 # define _(String) String
  38 #endif
  39
  40 #ifdef _LIBC
  41 /* In the GNU C library, there is a predefined variable for this.  */
  42
  43 # define program_name program_invocation_name
  44 # include <errno.h>
  45
  46 /* In GNU libc we want do not want to use the common name `error' directly.
  47    Instead make it a weak alias.  */
  48 # define error __error
  49 # define error_at_line __error_at_line
  50
  51 # ifdef USE_IN_LIBIO
  52 #  include <libio/iolibio.h>
  53 #  define fflush(s) _IO_fflush (s)
  54 # endif
  55
  56 #else /* not _LIBC */
  57
  58 /* The calling program should define program_name and set it to the
  59    name of the executing program.  */
  60 extern char *program_name;
  61
  62 # if HAVE_STRERROR
  63 #  ifndef HAVE_DECL_STRERROR
  64 "this configure-time declaration test was not run"
  65 #  endif
  66 #  if !HAVE_DECL_STRERROR && !defined strerror
  67 char *strerror (int);
  68 #  endif
  69 # else
  70 static char *
  71 private_strerror (int errnum)
  72 {
  73   extern char *sys_errlist[];
  74   extern int sys_nerr;
  75
  76   if (errnum > 0 && errnum <= sys_nerr)
  77     return _(sys_errlist[errnum]);
  78   return _("Unknown system error");
  79 }
  80 #  define strerror private_strerror
  81 # endif /* HAVE_STRERROR */
  82 #endif  /* not _LIBC */
  83
  84 /* This variable is set each time `warn' is called.  */
  85 bool warning_issued;
  86
  87 /* This variable is set each time `complain' is called.  */
  88 bool complaint_issued;
  89
  90 \f
  91 /*--------------------------------.
  92 | Report a warning, and proceed.  |
  93 `--------------------------------*/
  94
  95 void
  96 warn_at (location_t location, const char *message, ...)
  97 {
  98   va_list args;
  99
 100   fflush (stdout);
 101   LOCATION_PRINT (stderr, location);
 102   fputs (": ", stderr);
 103   fputs (_("warning: "), stderr);
 104
 105   va_start (args, message);
 106   vfprintf (stderr, message, args);
 107   va_end (args);
 108
 109   warning_issued = true;
 110   putc ('\n', stderr);
 111   fflush (stderr);
 112 }
 113
 114 void
 115 warn (const char *message, ...)
 116 {
 117   va_list args;
 118
 119   fflush (stdout);
 120   fprintf (stderr, "%s: %s", infile ? infile : program_name, _("warning: "));
 121
 122   va_start (args, message);
 123   vfprintf (stderr, message, args);
 124   va_end (args);
 125
 126   warning_issued = true;
 127   putc ('\n', stderr);
 128   fflush (stderr);
 129 }
 130 \f
 131 /*-----------------------------------------------------------.
 132 | An error has occurred, but we can proceed, and die later.  |
 133 `-----------------------------------------------------------*/
 134
 135 void
 136 complain_at (location_t location, const char *message, ...)
 137 {
 138   va_list args;
 139
 140   fflush (stdout);
 141   LOCATION_PRINT (stderr, location);
 142   fputs (": ", stderr);
 143
 144   va_start (args, message);
 145   vfprintf (stderr, message, args);
 146   va_end (args);
 147
 148   complaint_issued = true;
 149   putc ('\n', stderr);
 150   fflush (stderr);
 151 }
 152
 153 void
 154 complain (const char *message, ...)
 155 {
 156   va_list args;
 157
 158   fflush (stdout);
 159   fprintf (stderr, "%s: ", infile ? infile : program_name);
 160
 161   va_start (args, message);
 162   vfprintf (stderr, message, args);
 163   va_end (args);
 164
 165   complaint_issued = true;
 166   putc ('\n', stderr);
 167   fflush (stderr);
 168 }
 169 \f
 170 /*-------------------------------------------------.
 171 | A severe error has occurred, we cannot proceed.  |
 172 `-------------------------------------------------*/
 173
 174 void
 175 fatal_at (location_t location, const char *message, ...)
 176 {
 177   va_list args;
 178
 179   fflush (stdout);
 180   LOCATION_PRINT (stderr, location);
 181   fputs (": ", stderr);
 182   fputs (_("fatal error: "), stderr);
 183
 184   va_start (args, message);
 185   vfprintf (stderr, message, args);
 186   va_end (args);
 187   putc ('\n', stderr);
 188   fflush (stderr);
 189   exit (EXIT_FAILURE);
 190 }
 191
 192 void
 193 fatal (const char *message, ...)
 194 {
 195   va_list args;
 196
 197   fflush (stdout);
 198   fprintf (stderr, "%s: ", infile ? infile : program_name);
 199
 200   fputs (_("fatal error: "), stderr);
 201
 202   va_start (args, message);
 203   vfprintf (stderr, message, args);
 204   va_end (args);
 205   putc ('\n', stderr);
 206   fflush (stderr);
 207   exit (EXIT_FAILURE);
 208 }