gcc/diagnostic.h

   1 /* Various declarations for language-independent diagnostics subroutines.
   2    Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
   3    Free Software Foundation, Inc.
   4    Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify it under
   9 the terms of the GNU General Public License as published by the Free
  10 Software Foundation; either version 2, or (at your option) any later
  11 version.
  12
  13 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  14 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  15 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  16 for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to the Free
  20 Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
  21 02110-1301, USA.  */
  22
  23 #ifndef GCC_DIAGNOSTIC_H
  24 #define GCC_DIAGNOSTIC_H
  25
  26 #include "pretty-print.h"
  27
  28 /* Constants used to discriminate diagnostics.  */
  29 typedef enum
  30 {
  31 #define DEFINE_DIAGNOSTIC_KIND(K, msgid) K,
  32 #include "diagnostic.def"
  33 #undef DEFINE_DIAGNOSTIC_KIND
  34   DK_LAST_DIAGNOSTIC_KIND
  35 } diagnostic_t;
  36
  37 /* A diagnostic is described by the MESSAGE to send, the FILE and LINE of
  38    its context and its KIND (ice, error, warning, note, ...)  See complete
  39    list in diagnostic.def.  */
  40 typedef struct
  41 {
  42   text_info message;
  43   location_t location;
  44   /* The kind of diagnostic it is about.  */
  45   diagnostic_t kind;
  46   /* Which OPT_* directly controls this diagnostic.  */
  47   int option_index;
  48 } diagnostic_info;
  49
  50 #define pedantic_error_kind() (flag_pedantic_errors ? DK_ERROR : DK_WARNING)
  51
  52
  53 /*  Forward declarations.  */
  54 typedef struct diagnostic_context diagnostic_context;
  55 typedef void (*diagnostic_starter_fn) (diagnostic_context *,
  56                                        diagnostic_info *);
  57 typedef diagnostic_starter_fn diagnostic_finalizer_fn;
  58
  59 /* This data structure bundles altogether any information relevant to
  60    the context of a diagnostic message.  */
  61 struct diagnostic_context
  62 {
  63   /* Where most of the diagnostic formatting work is done.  */
  64   pretty_printer *printer;
  65
  66   /* The number of times we have issued diagnostics.  */
  67   int diagnostic_count[DK_LAST_DIAGNOSTIC_KIND];
  68
  69   /* True if we should display the "warnings are being tread as error"
  70      message, usually displayed once per compiler run.  */
  71   bool issue_warnings_are_errors_message;
  72
  73   /* True if it has been requested that warnings be treated as errors.  */
  74   bool warning_as_error_requested;
  75
  76   /* True if we should print the command line option which controls
  77      each diagnostic, if known.  */
  78   bool show_option_requested;
  79
  80   /* True if we should raise a SIGABRT on errors.  */
  81   bool abort_on_error;
  82
  83   /* This function is called before any message is printed out.  It is
  84      responsible for preparing message prefix and such.  For example, it
  85      might say:
  86      In file included from "/usr/local/include/curses.h:5:
  87                       from "/home/gdr/src/nifty_printer.h:56:
  88                       ...
  89   */
  90   diagnostic_starter_fn begin_diagnostic;
  91
  92   /* This function is called after the diagnostic message is printed.  */
  93   diagnostic_finalizer_fn end_diagnostic;
  94
  95   /* Client hook to report an internal error.  */
  96   void (*internal_error) (const char *, va_list *);
  97
  98   /* Function of last diagnostic message; more generally, function such that
  99      if next diagnostic message is in it then we don't have to mention the
 100      function name.  */
 101   tree last_function;
 102
 103   /* Used to detect when input_file_stack has changed since last described.  */
 104   int last_module;
 105
 106   int lock;
 107 };
 108
 109 /* Client supplied function to announce a diagnostic.  */
 110 #define diagnostic_starter(DC) (DC)->begin_diagnostic
 111
 112 /* Client supplied function called after a diagnostic message is
 113    displayed.  */
 114 #define diagnostic_finalizer(DC) (DC)->end_diagnostic
 115
 116 /* Extension hook for client.  */
 117 #define diagnostic_auxiliary_data(DC) (DC)->x_data
 118
 119 /* Same as pp_format_decoder.  Works on 'diagnostic_context *'.  */
 120 #define diagnostic_format_decoder(DC) ((DC)->printer->format_decoder)
 121
 122 /* Same as output_prefixing_rule.  Works on 'diagnostic_context *'.  */
 123 #define diagnostic_prefixing_rule(DC) ((DC)->printer->wrapping.rule)
 124
 125 /* Maximum characters per line in automatic line wrapping mode.
 126    Zero means don't wrap lines.  */
 127 #define diagnostic_line_cutoff(DC) ((DC)->printer->wrapping.line_cutoff)
 128
 129 #define diagnostic_flush_buffer(DC) pp_base_flush ((DC)->printer)
 130
 131 /* True if the last function in which a diagnostic was reported is
 132    different from the current one.  */
 133 #define diagnostic_last_function_changed(DC) \
 134   ((DC)->last_function != current_function_decl)
 135
 136 /* Remember the current function as being the last one in which we report
 137    a diagnostic.  */
 138 #define diagnostic_set_last_function(DC) \
 139   (DC)->last_function = current_function_decl
 140
 141 /* True if the last module or file in which a diagnostic was reported is
 142    different from the current one.  */
 143 #define diagnostic_last_module_changed(DC) \
 144   ((DC)->last_module != input_file_stack_tick)
 145
 146 /* Remember the current module or file as being the last one in which we
 147    report a diagnostic.  */
 148 #define diagnostic_set_last_module(DC) \
 149   (DC)->last_module = input_file_stack_tick
 150
 151 /* Raise SIGABRT on any diagnostic of severity DK_ERROR or higher.  */
 152 #define diagnostic_abort_on_error(DC) \
 153   (DC)->abort_on_error = true
 154
 155 /* This diagnostic_context is used by front-ends that directly output
 156    diagnostic messages without going through `error', `warning',
 157    and similar functions.  */
 158 extern diagnostic_context *global_dc;
 159
 160 /* The total count of a KIND of diagnostics emitted so far.  */
 161 #define diagnostic_kind_count(DC, DK) (DC)->diagnostic_count[(int) (DK)]
 162
 163 /* The number of errors that have been issued so far.  Ideally, these
 164    would take a diagnostic_context as an argument.  */
 165 #define errorcount diagnostic_kind_count (global_dc, DK_ERROR)
 166 /* Similarly, but for warnings.  */
 167 #define warningcount diagnostic_kind_count (global_dc, DK_WARNING)
 168 /* Similarly, but for sorrys.  */
 169 #define sorrycount diagnostic_kind_count (global_dc, DK_SORRY)
 170
 171 /* Returns nonzero if warnings should be emitted.  */
 172 #define diagnostic_report_warnings_p()                  \
 173   (!inhibit_warnings                                    \
 174    && !(in_system_header && !warn_system_headers))
 175
 176 #define report_diagnostic(D) diagnostic_report_diagnostic (global_dc, D)
 177
 178 /* Diagnostic related functions.  */
 179 extern void diagnostic_initialize (diagnostic_context *);
 180 extern void diagnostic_report_current_module (diagnostic_context *);
 181 extern void diagnostic_report_current_function (diagnostic_context *);
 182 extern void diagnostic_report_diagnostic (diagnostic_context *,
 183                                           diagnostic_info *);
 184 #ifdef ATTRIBUTE_GCC_DIAG
 185 extern void diagnostic_set_info (diagnostic_info *, const char *, va_list *,
 186                                  location_t, diagnostic_t) ATTRIBUTE_GCC_DIAG(2,0);
 187 #endif
 188 extern char *diagnostic_build_prefix (diagnostic_info *);
 189
 190 /* Pure text formatting support functions.  */
 191 extern char *file_name_as_prefix (const char *);
 192
 193 /* In tree-pretty-print.c  */
 194 extern int dump_generic_node (pretty_printer *, tree, int, int, bool);
 195 extern void print_generic_stmt (FILE *, tree, int);
 196 extern void print_generic_stmt_indented (FILE *, tree, int, int);
 197 extern void print_generic_expr (FILE *, tree, int);
 198 extern void print_generic_decl (FILE *, tree, int);
 199
 200 extern void debug_generic_expr (tree);
 201 extern void debug_generic_stmt (tree);
 202 extern void debug_c_tree (tree);
 203 #endif /* ! GCC_DIAGNOSTIC_H */