1 /* Various declarations for language-independent diagnostics subroutines.
2 Copyright (C) 2000, 2001 Free Software Foundation, Inc.
3 Contributed by Gabriel Dos Reis <gdr@codesourcery.com>
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 #ifndef GCC_DIAGNOSTIC_H
23 #define GCC_DIAGNOSTIC_H
27 /* Forward declarations. */
28 typedef struct output_buffer output_buffer;
29 typedef struct diagnostic_context diagnostic_context;
30 typedef void (*diagnostic_starter_fn) PARAMS ((output_buffer *,
31 diagnostic_context *));
32 typedef diagnostic_starter_fn diagnostic_finalizer_fn;
36 #define DEFINE_DIAGNOSTIC_KIND(K, M) K,
37 #include "diagnostic.def"
38 #undef DEFINE_DIAGNOSTIC_KIND
39 DK_LAST_DIAGNOSTIC_KIND
42 #define pedantic_error_kind() (flag_pedantic_errors ? DK_ERROR : DK_WARNING)
44 /* How often diagnostics are prefixed by their locations:
45 o DIAGNOSTICS_SHOW_PREFIX_NEVER: never - not yet supported;
46 o DIAGNOSTICS_SHOW_PREFIX_ONCE: emit only once;
47 o DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE: emit each time a physical
51 DIAGNOSTICS_SHOW_PREFIX_ONCE = 0x0,
52 DIAGNOSTICS_SHOW_PREFIX_NEVER = 0x1,
53 DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE = 0x2
54 } diagnostic_prefixing_rule_t;
56 /* The type of front-end specific hook that formats trees into an
57 output_buffer. A language specific printer returns a truth value if
58 everything goes well. */
59 typedef int (*printer_fn) PARAMS ((output_buffer *));
61 /* This data structure encapsulates an output_buffer's state. */
64 /* The prefix for each new line. */
67 /* The real upper bound of number of characters per line, taking into
68 account the case of a very very looong prefix. */
71 /* The ideal upper bound of number of characters per line, as suggested
73 int ideal_maximum_length;
75 /* Indentation count. */
78 /* Nonzero if current PREFIX was emitted at least once. */
81 /* Nonzero means one should emit a newline before outputing anything. */
84 /* Current prefixing rule. */
85 diagnostic_prefixing_rule_t prefixing_rule;
87 /* The current char to output. Updated by front-end (*format_map) when
88 it is called to report front-end printer for a specified format. */
91 /* A pointer to the variable argument-list for formatting. */
94 /* The number of times we have issued diagnostics. */
95 int diagnostic_count[DK_LAST_DIAGNOSTIC_KIND];
98 /* The output buffer datatype. This is best seen as an abstract datatype. */
101 /* Internal data. These fields should not be accessed directly by
104 /* The current state of the buffer. */
107 /* Where to output formatted text. */
110 /* The obstack where the text is built up. */
111 struct obstack obstack;
113 /* The amount of characters output so far. */
116 /* This must be large enough to hold any printed integer or
117 floating-point value. */
118 char digit_buffer[128];
120 /* If non-NULL, this function formats data in the BUFFER. When called,
121 output_buffer_text_cursor (BUFFER) points to a format code.
122 FORMAT_DECODER should call output_add_string (and related functions)
123 to add data to the BUFFER. FORMAT_DECODER can read arguments from
124 output_buffer_format_args (BUFFER) using VA_ARG. If the BUFFER needs
125 additional characters from the format string, it should advance
126 the output_buffer_text_cursor (BUFFER) as it goes. When FORMAT_DECODER
127 returns, output_buffer_text_cursor (BUFFER) should point to the last
128 character processed. */
130 printer_fn format_decoder;
133 #define output_buffer_state(BUFFER) (BUFFER)->state
134 #define output_buffer_attached_stream(BUFFER) (BUFFER)->stream
135 #define output_buffer_text_cursor(BUFFER) (BUFFER)->state.cursor
136 #define output_buffer_format_args(BUFFER) *((BUFFER)->state.format_args)
137 #define output_needs_newline(BUFFER) (BUFFER)->state.need_newline_p
138 #define output_buffer_state(BUFFER) (BUFFER)->state
139 #define output_indentation(BUFFER) (BUFFER)->state.indent_skip
140 #define output_message_text(BUFFER) \
141 ((const char *) obstack_base (&(BUFFER)->obstack))
143 /* This data structure bundles altogether any information relevant to
144 the context of a diagnostic message. */
145 struct diagnostic_context
147 /* Where most of the diagnostic formatting work is done. In Object
148 Oriented terms, we'll say that diagnostic_context is a sub-class of
150 output_buffer buffer;
152 /* The diagnostic message to output. */
155 /* A pointer to a variable list of the arguments necessary for the
156 purpose of message formatting. */
159 /* The name of the source file involved in the diiagnostic. */
162 /* The line-location in the source file. */
165 /* Is this message a warning? */
168 /* This function is called before any message is printed out. It is
169 responsible for preparing message prefix and such. For example, it
171 In file included from "/usr/local/include/curses.h:5:
172 from "/home/gdr/src/nifty_printer.h:56:
175 void (*begin_diagnostic) PARAMS ((output_buffer *, diagnostic_context *));
177 /* This function is called after the diagnostic message is printed. */
178 void (*end_diagnostic) PARAMS ((output_buffer *, diagnostic_context *));
180 /* Hook for front-end extensions. */
184 #define diagnostic_message(DC) (DC)->message
185 #define diagnostic_argument_list(DC) (DC)->args_ptr
186 #define diagnostic_file_location(DC) (DC)->file
187 #define diagnostic_line_location(DC) (DC)->line
188 #define diagnostic_is_warning(DC) (DC)->warn
189 #define diagnostic_starter(DC) (DC)->begin_diagnostic
190 #define diagnostic_finalizer(DC) (DC)->end_diagnostic
191 #define diagnostic_auxiliary_data(DC) (DC)->x_data
192 #define diagnostic_format_decoder(DC) (DC)->buffer.format_decoder
193 #define diagnostic_prefixing_rule(DC) (DC)->buffer.state.prefixing_rule
195 /* Maximum characters per line in automatic line wrapping mode.
196 Zero means don't wrap lines. */
197 #define diagnostic_line_cutoff(DC) (DC)->buffer.state.ideal_maximum_length
199 /* This output buffer is used by front-ends that directly output
200 diagnostic messages without going through `error', `warning',
201 and similar functions. In general, such usage should be
202 avoided. This global buffer will go away, once all such usage
204 extern output_buffer *diagnostic_buffer;
205 extern diagnostic_context *global_dc;
207 #define diagnostic_kind_count(BUFFER, DK) \
208 (BUFFER)->state.diagnostic_count[(int) DK]
210 /* The number of errors that have been issued so far. Ideally, these
211 would take an output_buffer as an argument. */
212 #define errorcount diagnostic_kind_count (diagnostic_buffer, DK_ERROR)
213 /* Similarly, but for warnings. */
214 #define warningcount diagnostic_kind_count (diagnostic_buffer, DK_WARNING)
215 /* Similarly, but for sorrys. */
216 #define sorrycount diagnostic_kind_count (diagnostic_buffer, DK_SORRY)
218 /* Returns non-zero if warnings should be emitted. */
219 #define diagnostic_report_warnings_p() \
221 && !(in_system_header && !warn_system_headers))
225 extern void set_diagnostic_context PARAMS ((diagnostic_context *,
226 const char *, va_list *,
227 const char *, int, int));
228 extern void set_internal_error_function PARAMS ((void (*)
229 PARAMS ((const char *,
231 extern void report_diagnostic PARAMS ((diagnostic_context *));
232 extern void diagnostic_initialize PARAMS ((diagnostic_context *));
233 extern void init_output_buffer PARAMS ((output_buffer *,
235 extern void flush_diagnostic_buffer PARAMS ((void));
236 extern void output_clear PARAMS ((output_buffer *));
237 extern const char *output_get_prefix PARAMS ((const output_buffer *));
238 extern const char *output_last_position PARAMS ((const output_buffer *));
239 extern void output_set_prefix PARAMS ((output_buffer *,
241 extern void output_destroy_prefix PARAMS ((output_buffer *));
242 extern void output_set_maximum_length PARAMS ((output_buffer *, int));
243 extern void output_emit_prefix PARAMS ((output_buffer *));
244 extern void output_add_newline PARAMS ((output_buffer *));
245 extern void output_add_space PARAMS ((output_buffer *));
246 extern int output_space_left PARAMS ((const output_buffer *));
247 extern void output_append PARAMS ((output_buffer *, const char *,
249 extern void output_add_character PARAMS ((output_buffer *, int));
250 extern void output_decimal PARAMS ((output_buffer *, int));
251 extern void output_add_string PARAMS ((output_buffer *,
253 extern const char *output_finalize_message PARAMS ((output_buffer *));
254 extern void output_clear_message_text PARAMS ((output_buffer *));
255 extern void output_printf PARAMS ((output_buffer *, const char *,
256 ...)) ATTRIBUTE_PRINTF_2;
257 extern int output_is_line_wrapping PARAMS ((output_buffer *));
258 extern void output_verbatim PARAMS ((output_buffer *, const char *,
259 ...)) ATTRIBUTE_PRINTF_2;
260 extern void verbatim PARAMS ((const char *, ...))
262 extern char *context_as_prefix PARAMS ((const char *, int, int));
263 extern char *file_name_as_prefix PARAMS ((const char *));
264 extern int error_module_changed PARAMS ((void));
265 extern void record_last_error_module PARAMS ((void));
266 extern int error_function_changed PARAMS ((void));
267 extern void record_last_error_function PARAMS ((void));
268 extern void report_problematic_module PARAMS ((output_buffer *));
270 #endif /* ! GCC_DIAGNOSTIC_H */