gcc/diagnostic.h

   1 /* Various declarations for language-independent diagnostics subroutines.
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   3    Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
   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 2, 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 COPYING.  If not, write to the Free
  19 Software Foundation, 59 Temple Place - Suite 330, Boston, MA
  20 02111-1307, USA.  */
  21
  22 #ifndef GCC_DIAGNOSTIC_H
  23 #define GCC_DIAGNOSTIC_H
  24
  25 #include "pretty-print.h"
  26
  27 /* Constants used to discriminate diagnostics.  */
  28 typedef enum
  29 {
  30 #define DEFINE_DIAGNOSTIC_KIND(K, msgid) K,
  31 #include "diagnostic.def"
  32 #undef DEFINE_DIAGNOSTIC_KIND
  33   DK_LAST_DIAGNOSTIC_KIND
  34 } diagnostic_t;
  35
  36 /* A diagnostic is described by the MESSAGE to send, the FILE and LINE of
  37    its context and its KIND (ice, error, warning, note, ...)  See complete
  38    list in diagnostic.def.  */
  39 typedef struct
  40 {
  41   text_info message;
  42   location_t location;
  43   /* The kind of diagnostic it is about.  */
  44   diagnostic_t kind;
  45 } diagnostic_info;
  46
  47 #define pedantic_error_kind() (flag_pedantic_errors ? DK_ERROR : DK_WARNING)
  48
  49
  50 /*  Forward declarations.  */
  51 typedef struct diagnostic_context diagnostic_context;
  52 typedef void (*diagnostic_starter_fn) (diagnostic_context *,
  53                                        diagnostic_info *);
  54 typedef diagnostic_starter_fn diagnostic_finalizer_fn;
  55
  56 /* This data structure bundles altogether any information relevant to
  57    the context of a diagnostic message.  */
  58 struct diagnostic_context
  59 {
  60   /* Where most of the diagnostic formatting work is done.  */
  61   pretty_printer *printer;
  62
  63   /* The number of times we have issued diagnostics.  */
  64   int diagnostic_count[DK_LAST_DIAGNOSTIC_KIND];
  65
  66   /* True if we should display the "warnings are being tread as error"
  67      message, usually displayed once per compiler run.  */
  68   bool warnings_are_errors_message;
  69
  70   /* True if we should raise a SIGABRT on errors.  */
  71   bool abort_on_error;
  72
  73   /* This function is called before any message is printed out.  It is
  74      responsible for preparing message prefix and such.  For example, it
  75      might say:
  76      In file included from "/usr/local/include/curses.h:5:
  77                       from "/home/gdr/src/nifty_printer.h:56:
  78                       ...
  79   */
  80   diagnostic_starter_fn begin_diagnostic;
  81
  82   /* This function is called after the diagnostic message is printed.  */
  83   diagnostic_finalizer_fn end_diagnostic;
  84
  85   /* Client hook to report an internal error.  */
  86   void (*internal_error) (const char *, va_list *);
  87
  88   /* Function of last diagnostic message; more generally, function such that
  89      if next diagnostic message is in it then we don't have to mention the
  90      function name.  */
  91   tree last_function;
  92
  93   /* Used to detect when input_file_stack has changed since last described.  */
  94   int last_module;
  95
  96   int lock;
  97
  98   /* Hook for front-end extensions.  */
  99   void *x_data;
 100 };
 101
 102 /* Client supplied function to announce a diagnostic.  */
 103 #define diagnostic_starter(DC) (DC)->begin_diagnostic
 104
 105 /* Client supplied function called after a diagnostic message is
 106    displayed.  */
 107 #define diagnostic_finalizer(DC) (DC)->end_diagnostic
 108
 109 /* Extension hook for client.  */
 110 #define diagnostic_auxiliary_data(DC) (DC)->x_data
 111
 112 /* Same as pp_format_decoder.  Works on 'diagnostic_context *'.  */
 113 #define diagnostic_format_decoder(DC) ((DC)->printer->format_decoder)
 114
 115 /* Same as output_prefixing_rule.  Works on 'diagnostic_context *'.  */
 116 #define diagnostic_prefixing_rule(DC) ((DC)->printer->prefixing_rule)
 117
 118 /* Maximum characters per line in automatic line wrapping mode.
 119    Zero means don't wrap lines.  */
 120 #define diagnostic_line_cutoff(DC) ((DC)->printer->ideal_maximum_length)
 121
 122 #define diagnostic_flush_buffer(DC) pp_base_flush ((DC)->printer)
 123
 124 /* True if the last function in which a diagnostic was reported is
 125    different from the current one.  */
 126 #define diagnostic_last_function_changed(DC) \
 127   ((DC)->last_function != current_function_decl)
 128
 129 /* Remember the current function as being the last one in which we report
 130    a diagnostic.  */
 131 #define diagnostic_set_last_function(DC) \
 132   (DC)->last_function = current_function_decl
 133
 134 /* True if the last module or file in which a diagnostic was reported is
 135    different from the current one.  */
 136 #define diagnostic_last_module_changed(DC) \
 137   ((DC)->last_module != input_file_stack_tick)
 138
 139 /* Remember the current module or file as being the last one in which we
 140    report a diagnostic.  */
 141 #define diagnostic_set_last_module(DC) \
 142   (DC)->last_module = input_file_stack_tick
 143
 144 /* Raise SIGABRT on any diagnostic of severity DK_ERROR or higher.  */
 145 #define diagnostic_abort_on_error(DC) \
 146   (DC)->abort_on_error = true
 147
 148 /* This diagnostic_context is used by front-ends that directly output
 149    diagnostic messages without going through `error', `warning',
 150    and similar functions.  */
 151 extern diagnostic_context *global_dc;
 152
 153 /* The total count of a KIND of diagnostics emitted so far.  */
 154 #define diagnostic_kind_count(DC, DK) (DC)->diagnostic_count[(int) (DK)]
 155
 156 /* The number of errors that have been issued so far.  Ideally, these
 157    would take a diagnostic_context as an argument.  */
 158 #define errorcount diagnostic_kind_count (global_dc, DK_ERROR)
 159 /* Similarly, but for warnings.  */
 160 #define warningcount diagnostic_kind_count (global_dc, DK_WARNING)
 161 /* Similarly, but for sorrys.  */
 162 #define sorrycount diagnostic_kind_count (global_dc, DK_SORRY)
 163
 164 /* Returns nonzero if warnings should be emitted.  */
 165 #define diagnostic_report_warnings_p()                  \
 166   (!inhibit_warnings                                    \
 167    && !(in_system_header && !warn_system_headers))
 168
 169 #define report_diagnostic(D) diagnostic_report_diagnostic (global_dc, D)
 170
 171 /* Diagnostic related functions.  */
 172 extern void diagnostic_initialize (diagnostic_context *);
 173 extern void diagnostic_report_current_module (diagnostic_context *);
 174 extern void diagnostic_report_current_function (diagnostic_context *);
 175 extern void diagnostic_report_diagnostic (diagnostic_context *,
 176                                           diagnostic_info *);
 177 extern void diagnostic_set_info (diagnostic_info *, const char *, va_list *,
 178                                  location_t, diagnostic_t);
 179 extern char *diagnostic_build_prefix (diagnostic_info *);
 180
 181 /* Pure text formatting support functions.  */
 182 extern void verbatim (const char *, ...);
 183 extern char *file_name_as_prefix (const char *);
 184
 185 #endif /* ! GCC_DIAGNOSTIC_H */