gcc/errors.c

   1 /* Basic error reporting routines.
   2    Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2007
   3    Free Software Foundation, Inc.
   4
   5 This file is part of GCC.
   6
   7 GCC is free software; you can redistribute it and/or modify it under
   8 the terms of the GNU General Public License as published by the Free
   9 Software Foundation; either version 3, or (at your option) any later
  10 version.
  11
  12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  14 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  15 for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GCC; see the file COPYING3.  If not see
  19 <http://www.gnu.org/licenses/>.  */
  20
  21 /* warning, error, and fatal.  These definitions are suitable for use
  22    in the generator programs; the compiler has a more elaborate suite
  23    of diagnostic printers, found in diagnostic.c.  */
  24
  25 #ifdef GENERATOR_FILE
  26 #include "bconfig.h"
  27 #else
  28 #include "config.h"
  29 #endif
  30 #include "system.h"
  31 #include "errors.h"
  32
  33 /* Set this to argv[0] at the beginning of main.  */
  34
  35 const char *progname;
  36
  37 /* Starts out 0, set to 1 if error is called.  */
  38
  39 int have_error = 0;
  40
  41 /* Print a warning message - output produced, but there may be problems.  */
  42
  43 bool
  44 warning (int opt ATTRIBUTE_UNUSED, const char *format, ...)
  45 {
  46   va_list ap;
  47
  48   va_start (ap, format);
  49   fprintf (stderr, "%s: warning: ", progname);
  50   vfprintf (stderr, format, ap);
  51   va_end (ap);
  52   fputc('\n', stderr);
  53   return true;
  54 }
  55
  56
  57 /* Print an error message - we keep going but the output is unusable.  */
  58
  59 void
  60 error (const char *format, ...)
  61 {
  62   va_list ap;
  63
  64   va_start (ap, format);
  65   fprintf (stderr, "%s: ", progname);
  66   vfprintf (stderr, format, ap);
  67   va_end (ap);
  68   fputc('\n', stderr);
  69
  70   have_error = 1;
  71 }
  72
  73
  74 /* Fatal error - terminate execution immediately.  Does not return.  */
  75
  76 void
  77 fatal (const char *format, ...)
  78 {
  79   va_list ap;
  80
  81   va_start (ap, format);
  82   fprintf (stderr, "%s: ", progname);
  83   vfprintf (stderr, format, ap);
  84   va_end (ap);
  85   fputc('\n', stderr);
  86   exit (FATAL_EXIT_CODE);
  87 }
  88
  89 /* Similar, but say we got an internal error.  */
  90
  91 void
  92 internal_error (const char *format, ...)
  93 {
  94   va_list ap;
  95
  96   va_start (ap, format);
  97   fprintf (stderr, "%s: Internal error: ", progname);
  98   vfprintf (stderr, format, ap);
  99   va_end (ap);
 100   fputc ('\n', stderr);
 101   exit (FATAL_EXIT_CODE);
 102 }
 103
 104 /* Given a partial pathname as input, return another pathname that
 105    shares no directory elements with the pathname of __FILE__.  This
 106    is used by fancy_abort() to print `Internal compiler error in expr.c'
 107    instead of `Internal compiler error in ../../GCC/gcc/expr.c'.  This
 108    version if for the gen* programs and so needn't handle subdirectories.  */
 109
 110 const char *
 111 trim_filename (const char *name)
 112 {
 113   static const char this_file[] = __FILE__;
 114   const char *p = name, *q = this_file;
 115
 116   /* Skip any parts the two filenames have in common.  */
 117   while (*p == *q && *p != 0 && *q != 0)
 118     p++, q++;
 119
 120   /* Now go backwards until the previous directory separator.  */
 121   while (p > name && !IS_DIR_SEPARATOR (p[-1]))
 122     p--;
 123
 124   return p;
 125 }
 126
 127 /* "Fancy" abort.  Reports where in the compiler someone gave up.
 128    This file is used only by build programs, so we're not as polite as
 129    the version in diagnostic.c.  */
 130 void
 131 fancy_abort (const char *file, int line, const char *func)
 132 {
 133   internal_error ("abort in %s, at %s:%d", func, trim_filename (file), line);
 134 }