libcpp/errors.c

   1 /* Default error handlers for CPP Library.
   2    Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1998, 1999, 2000,
   3    2001, 2002, 2004, 2008, 2009, 2010 Free Software Foundation, Inc.
   4    Written by Per Bothner, 1994.
   5    Based on CCCP program by Paul Rubin, June 1986
   6    Adapted to ANSI C, Richard Stallman, Jan 1987
   7
   8 This program is free software; you can redistribute it and/or modify it
   9 under the terms of the GNU General Public License as published by the
  10 Free Software Foundation; either version 3, or (at your option) any
  11 later version.
  12
  13 This program is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with this program; see the file COPYING3.  If not see
  20 <http://www.gnu.org/licenses/>.
  21
  22  In other words, you are welcome to use, share and improve this program.
  23  You are forbidden to forbid anyone else to use, share and improve
  24  what you give them.   Help stamp out software-hoarding!  */
  25
  26 #include "config.h"
  27 #include "system.h"
  28 #include "cpplib.h"
  29 #include "internal.h"
  30
  31 /* Print a diagnostic at the location of the previously lexed token.  */
  32
  33 ATTRIBUTE_FPTR_PRINTF(4,0)
  34 static bool
  35 cpp_diagnostic (cpp_reader * pfile, int level, int reason,
  36                 const char *msgid, va_list *ap)
  37 {
  38   source_location src_loc;
  39   bool ret;
  40
  41   if (CPP_OPTION (pfile, traditional))
  42     {
  43       if (pfile->state.in_directive)
  44         src_loc = pfile->directive_line;
  45       else
  46         src_loc = pfile->line_table->highest_line;
  47     }
  48   /* We don't want to refer to a token before the beginning of the
  49      current run -- that is invalid.  */
  50   else if (pfile->cur_token == pfile->cur_run->base)
  51     {
  52       if (pfile->cur_run->prev != NULL)
  53         src_loc = pfile->cur_run->prev->limit->src_loc;
  54       else
  55         src_loc = 0;
  56     }
  57   else
  58     {
  59       src_loc = pfile->cur_token[-1].src_loc;
  60     }
  61
  62   if (!pfile->cb.error)
  63     abort ();
  64   ret = pfile->cb.error (pfile, level, reason, src_loc, 0, _(msgid), ap);
  65
  66   return ret;
  67 }
  68
  69 /* Print a warning or error, depending on the value of LEVEL.  */
  70
  71 bool
  72 cpp_error (cpp_reader * pfile, int level, const char *msgid, ...)
  73 {
  74   va_list ap;
  75   bool ret;
  76
  77   va_start (ap, msgid);
  78
  79   ret = cpp_diagnostic (pfile, level, CPP_W_NONE, msgid, &ap);
  80
  81   va_end (ap);
  82   return ret;
  83 }
  84
  85 /* Print a warning.  The warning reason may be given in REASON.  */
  86
  87 bool
  88 cpp_warning (cpp_reader * pfile, int reason, const char *msgid, ...)
  89 {
  90   va_list ap;
  91   bool ret;
  92
  93   va_start (ap, msgid);
  94
  95   ret = cpp_diagnostic (pfile, CPP_DL_WARNING, reason, msgid, &ap);
  96
  97   va_end (ap);
  98   return ret;
  99 }
 100
 101 /* Print a pedantic warning.  The warning reason may be given in REASON.  */
 102
 103 bool
 104 cpp_pedwarning (cpp_reader * pfile, int reason, const char *msgid, ...)
 105 {
 106   va_list ap;
 107   bool ret;
 108
 109   va_start (ap, msgid);
 110
 111   ret = cpp_diagnostic (pfile, CPP_DL_PEDWARN, reason, msgid, &ap);
 112
 113   va_end (ap);
 114   return ret;
 115 }
 116
 117 /* Print a warning, including system headers.  The warning reason may be
 118    given in REASON.  */
 119
 120 bool
 121 cpp_warning_syshdr (cpp_reader * pfile, int reason, const char *msgid, ...)
 122 {
 123   va_list ap;
 124   bool ret;
 125
 126   va_start (ap, msgid);
 127
 128   ret = cpp_diagnostic (pfile, CPP_DL_WARNING_SYSHDR, reason, msgid, &ap);
 129
 130   va_end (ap);
 131   return ret;
 132 }
 133
 134 /* Print a diagnostic at a specific location.  */
 135
 136 ATTRIBUTE_FPTR_PRINTF(6,0)
 137 static bool
 138 cpp_diagnostic_with_line (cpp_reader * pfile, int level, int reason,
 139                           source_location src_loc, unsigned int column,
 140                           const char *msgid, va_list *ap)
 141 {
 142   bool ret;
 143
 144   if (!pfile->cb.error)
 145     abort ();
 146   ret = pfile->cb.error (pfile, level, reason, src_loc, column, _(msgid), ap);
 147
 148   return ret;
 149 }
 150
 151 /* Print a warning or error, depending on the value of LEVEL.  */
 152
 153 bool
 154 cpp_error_with_line (cpp_reader *pfile, int level,
 155                      source_location src_loc, unsigned int column,
 156                      const char *msgid, ...)
 157 {
 158   va_list ap;
 159   bool ret;
 160
 161   va_start (ap, msgid);
 162
 163   ret = cpp_diagnostic_with_line (pfile, level, CPP_W_NONE, src_loc,
 164                                   column, msgid, &ap);
 165
 166   va_end (ap);
 167   return ret;
 168 }
 169
 170 /* Print a warning.  The warning reason may be given in REASON.  */
 171
 172 bool
 173 cpp_warning_with_line (cpp_reader *pfile, int reason,
 174                        source_location src_loc, unsigned int column,
 175                        const char *msgid, ...)
 176 {
 177   va_list ap;
 178   bool ret;
 179
 180   va_start (ap, msgid);
 181
 182   ret = cpp_diagnostic_with_line (pfile, CPP_DL_WARNING, reason, src_loc,
 183                                   column, msgid, &ap);
 184
 185   va_end (ap);
 186   return ret;
 187 }
 188
 189 /* Print a pedantic warning.  The warning reason may be given in REASON.  */
 190
 191 bool
 192 cpp_pedwarning_with_line (cpp_reader *pfile, int reason,
 193                           source_location src_loc, unsigned int column,
 194                           const char *msgid, ...)
 195 {
 196   va_list ap;
 197   bool ret;
 198
 199   va_start (ap, msgid);
 200
 201   ret = cpp_diagnostic_with_line (pfile, CPP_DL_PEDWARN, reason, src_loc,
 202                                   column, msgid, &ap);
 203
 204   va_end (ap);
 205   return ret;
 206 }
 207
 208 /* Print a warning, including system headers.  The warning reason may be
 209    given in REASON.  */
 210
 211 bool
 212 cpp_warning_with_line_syshdr (cpp_reader *pfile, int reason,
 213                               source_location src_loc, unsigned int column,
 214                               const char *msgid, ...)
 215 {
 216   va_list ap;
 217   bool ret;
 218
 219   va_start (ap, msgid);
 220
 221   ret = cpp_diagnostic_with_line (pfile, CPP_DL_WARNING_SYSHDR, reason, src_loc,
 222                                   column, msgid, &ap);
 223
 224   va_end (ap);
 225   return ret;
 226 }
 227
 228 /* Print a warning or error, depending on the value of LEVEL.  Include
 229    information from errno.  */
 230
 231 bool
 232 cpp_errno (cpp_reader *pfile, int level, const char *msgid)
 233 {
 234   if (msgid[0] == '\0')
 235     msgid = _("stdout");
 236
 237   return cpp_error (pfile, level, "%s: %s", msgid, xstrerror (errno));
 238 }