2013-05-23 Richard Biener <rguenther@suse.de>
[official-gcc.git] / gcc / pretty-print.h
blob13bb2dede90e6e204357b34c62d8acd5e9be4f29
1 /* Various declarations for language-independent pretty-print subroutines.
2 Copyright (C) 2002-2013 Free Software Foundation, Inc.
3 Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net>
5 This file is part of GCC.
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.
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.
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/>. */
21 #ifndef GCC_PRETTY_PRINT_H
22 #define GCC_PRETTY_PRINT_H
24 #include "obstack.h"
25 #include "input.h"
27 /* Maximum number of format string arguments. */
28 #define PP_NL_ARGMAX 30
30 /* The type of a text to be formatted according a format specification
31 along with a list of things. */
32 typedef struct
34 const char *format_spec;
35 va_list *args_ptr;
36 int err_no; /* for %m */
37 location_t *locus;
38 void **x_data;
39 } text_info;
41 /* How often diagnostics are prefixed by their locations:
42 o DIAGNOSTICS_SHOW_PREFIX_NEVER: never - not yet supported;
43 o DIAGNOSTICS_SHOW_PREFIX_ONCE: emit only once;
44 o DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE: emit each time a physical
45 line is started. */
46 typedef enum
48 DIAGNOSTICS_SHOW_PREFIX_ONCE = 0x0,
49 DIAGNOSTICS_SHOW_PREFIX_NEVER = 0x1,
50 DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE = 0x2
51 } diagnostic_prefixing_rule_t;
53 /* The chunk_info data structure forms a stack of the results from the
54 first phase of formatting (pp_base_format) which have not yet been
55 output (pp_base_output_formatted_text). A stack is necessary because
56 the diagnostic starter may decide to generate its own output by way
57 of the formatter. */
58 struct chunk_info
60 /* Pointer to previous chunk on the stack. */
61 struct chunk_info *prev;
63 /* Array of chunks to output. Each chunk is a NUL-terminated string.
64 In the first phase of formatting, even-numbered chunks are
65 to be output verbatim, odd-numbered chunks are format specifiers.
66 The second phase replaces all odd-numbered chunks with formatted
67 text, and the third phase simply emits all the chunks in sequence
68 with appropriate line-wrapping. */
69 const char *args[PP_NL_ARGMAX * 2];
72 /* The output buffer datatype. This is best seen as an abstract datatype
73 whose fields should not be accessed directly by clients. */
74 typedef struct
76 /* Obstack where the text is built up. */
77 struct obstack formatted_obstack;
79 /* Obstack containing a chunked representation of the format
80 specification plus arguments. */
81 struct obstack chunk_obstack;
83 /* Currently active obstack: one of the above two. This is used so
84 that the text formatters don't need to know which phase we're in. */
85 struct obstack *obstack;
87 /* Stack of chunk arrays. These come from the chunk_obstack. */
88 struct chunk_info *cur_chunk_array;
90 /* Where to output formatted text. */
91 FILE *stream;
93 /* The amount of characters output so far. */
94 int line_length;
96 /* This must be large enough to hold any printed integer or
97 floating-point value. */
98 char digit_buffer[128];
99 } output_buffer;
101 /* The type of pretty-printer flags passed to clients. */
102 typedef unsigned int pp_flags;
104 typedef enum
106 pp_none, pp_before, pp_after
107 } pp_padding;
109 /* Structure for switching in and out of verbatim mode in a convenient
110 manner. */
111 typedef struct
113 /* Current prefixing rule. */
114 diagnostic_prefixing_rule_t rule;
116 /* The ideal upper bound of number of characters per line, as suggested
117 by front-end. */
118 int line_cutoff;
119 } pp_wrapping_mode_t;
121 /* Maximum characters per line in automatic line wrapping mode.
122 Zero means don't wrap lines. */
123 #define pp_line_cutoff(PP) pp_base (PP)->wrapping.line_cutoff
125 /* Prefixing rule used in formatting a diagnostic message. */
126 #define pp_prefixing_rule(PP) pp_base (PP)->wrapping.rule
128 /* Get or set the wrapping mode as a single entity. */
129 #define pp_wrapping_mode(PP) pp_base (PP)->wrapping
131 /* The type of a hook that formats client-specific data onto a pretty_pinter.
132 A client-supplied formatter returns true if everything goes well,
133 otherwise it returns false. */
134 typedef bool (*printer_fn) (pretty_printer *, text_info *, const char *,
135 int, bool, bool, bool);
137 /* Client supplied function used to decode formats. */
138 #define pp_format_decoder(PP) pp_base (PP)->format_decoder
140 /* TRUE if a newline character needs to be added before further
141 formatting. */
142 #define pp_needs_newline(PP) pp_base (PP)->need_newline
144 /* True if PRETTY-PRINTER is in line-wrapping mode. */
145 #define pp_is_wrapping_line(PP) (pp_line_cutoff (PP) > 0)
147 /* The amount of whitespace to be emitted when starting a new line. */
148 #define pp_indentation(PP) pp_base (PP)->indent_skip
150 /* True if identifiers are translated to the locale character set on
151 output. */
152 #define pp_translate_identifiers(PP) pp_base (PP)->translate_identifiers
154 /* True if colors should be shown. */
155 #define pp_show_color(PP) pp_base (PP)->show_color
157 /* The data structure that contains the bare minimum required to do
158 proper pretty-printing. Clients may derived from this structure
159 and add additional fields they need. */
160 struct pretty_print_info
162 /* Where we print external representation of ENTITY. */
163 output_buffer *buffer;
165 /* The prefix for each new line. */
166 const char *prefix;
168 /* Where to put whitespace around the entity being formatted. */
169 pp_padding padding;
171 /* The real upper bound of number of characters per line, taking into
172 account the case of a very very looong prefix. */
173 int maximum_length;
175 /* Indentation count. */
176 int indent_skip;
178 /* Current wrapping mode. */
179 pp_wrapping_mode_t wrapping;
181 /* If non-NULL, this function formats a TEXT into the BUFFER. When called,
182 TEXT->format_spec points to a format code. FORMAT_DECODER should call
183 pp_string (and related functions) to add data to the BUFFER.
184 FORMAT_DECODER can read arguments from *TEXT->args_pts using VA_ARG.
185 If the BUFFER needs additional characters from the format string, it
186 should advance the TEXT->format_spec as it goes. When FORMAT_DECODER
187 returns, TEXT->format_spec should point to the last character processed.
189 printer_fn format_decoder;
191 /* Nonzero if current PREFIX was emitted at least once. */
192 bool emitted_prefix;
194 /* Nonzero means one should emit a newline before outputting anything. */
195 bool need_newline;
197 /* Nonzero means identifiers are translated to the locale character
198 set on output. */
199 bool translate_identifiers;
201 /* Nonzero means that text should be colorized. */
202 bool show_color;
205 #define pp_set_line_maximum_length(PP, L) \
206 pp_base_set_line_maximum_length (pp_base (PP), L)
207 #define pp_set_prefix(PP, P) pp_base_set_prefix (pp_base (PP), P)
208 #define pp_get_prefix(PP) pp_base_get_prefix (pp_base (PP))
209 static inline const char *
210 pp_base_get_prefix (const pretty_printer *pp) { return pp->prefix; }
211 #define pp_destroy_prefix(PP) pp_base_destroy_prefix (pp_base (PP))
212 #define pp_remaining_character_count_for_line(PP) \
213 pp_base_remaining_character_count_for_line (pp_base (PP))
214 #define pp_clear_output_area(PP) \
215 pp_base_clear_output_area (pp_base (PP))
216 #define pp_formatted_text(PP) pp_base_formatted_text (pp_base (PP))
217 #define pp_last_position_in_text(PP) \
218 pp_base_last_position_in_text (pp_base (PP))
219 #define pp_emit_prefix(PP) pp_base_emit_prefix (pp_base (PP))
220 #define pp_append_text(PP, B, E) \
221 pp_base_append_text (pp_base (PP), B, E)
222 #define pp_flush(PP) pp_base_flush (pp_base (PP))
223 #define pp_format(PP, TI) pp_base_format (pp_base (PP), TI)
224 #define pp_output_formatted_text(PP) \
225 pp_base_output_formatted_text (pp_base (PP))
226 #define pp_format_verbatim(PP, TI) \
227 pp_base_format_verbatim (pp_base (PP), TI)
229 #define pp_character(PP, C) pp_base_character (pp_base (PP), C)
230 #define pp_string(PP, S) pp_base_string (pp_base (PP), S)
231 #define pp_newline(PP) pp_base_newline (pp_base (PP))
233 #define pp_space(PP) pp_character (PP, ' ')
234 #define pp_left_paren(PP) pp_character (PP, '(')
235 #define pp_right_paren(PP) pp_character (PP, ')')
236 #define pp_left_bracket(PP) pp_character (PP, '[')
237 #define pp_right_bracket(PP) pp_character (PP, ']')
238 #define pp_left_brace(PP) pp_character (PP, '{')
239 #define pp_right_brace(PP) pp_character (PP, '}')
240 #define pp_semicolon(PP) pp_character (PP, ';')
241 #define pp_comma(PP) pp_string (PP, ", ")
242 #define pp_dot(PP) pp_character (PP, '.')
243 #define pp_colon(PP) pp_character (PP, ':')
244 #define pp_colon_colon(PP) pp_string (PP, "::")
245 #define pp_arrow(PP) pp_string (PP, "->")
246 #define pp_equal(PP) pp_character (PP, '=')
247 #define pp_question(PP) pp_character (PP, '?')
248 #define pp_bar(PP) pp_character (PP, '|')
249 #define pp_carret(PP) pp_character (PP, '^')
250 #define pp_ampersand(PP) pp_character (PP, '&')
251 #define pp_less(PP) pp_character (PP, '<')
252 #define pp_greater(PP) pp_character (PP, '>')
253 #define pp_plus(PP) pp_character (PP, '+')
254 #define pp_minus(PP) pp_character (PP, '-')
255 #define pp_star(PP) pp_character (PP, '*')
256 #define pp_slash(PP) pp_character (PP, '/')
257 #define pp_modulo(PP) pp_character (PP, '%')
258 #define pp_exclamation(PP) pp_character (PP, '!')
259 #define pp_complement(PP) pp_character (PP, '~')
260 #define pp_quote(PP) pp_character (PP, '\'')
261 #define pp_backquote(PP) pp_character (PP, '`')
262 #define pp_doublequote(PP) pp_character (PP, '"')
263 #define pp_newline_and_flush(PP) \
264 do { \
265 pp_newline (PP); \
266 pp_flush (PP); \
267 pp_needs_newline (PP) = false; \
268 } while (0)
269 #define pp_newline_and_indent(PP, N) \
270 do { \
271 pp_indentation (PP) += N; \
272 pp_newline (PP); \
273 pp_base_indent (pp_base (PP)); \
274 pp_needs_newline (PP) = false; \
275 } while (0)
276 #define pp_maybe_newline_and_indent(PP, N) \
277 if (pp_needs_newline (PP)) pp_newline_and_indent (PP, N)
278 #define pp_maybe_space(PP) pp_base_maybe_space (pp_base (PP))
279 #define pp_separate_with(PP, C) \
280 do { \
281 pp_character (PP, C); \
282 pp_space (PP); \
283 } while (0)
284 #define pp_scalar(PP, FORMAT, SCALAR) \
285 do \
287 sprintf (pp_buffer (PP)->digit_buffer, FORMAT, SCALAR); \
288 pp_string (PP, pp_buffer (PP)->digit_buffer); \
290 while (0)
291 #define pp_decimal_int(PP, I) pp_scalar (PP, "%d", I)
292 #define pp_unsigned_wide_integer(PP, I) \
293 pp_scalar (PP, HOST_WIDE_INT_PRINT_UNSIGNED, (unsigned HOST_WIDE_INT) I)
294 #define pp_wide_integer(PP, I) \
295 pp_scalar (PP, HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT) I)
296 #define pp_widest_integer(PP, I) \
297 pp_scalar (PP, HOST_WIDEST_INT_PRINT_DEC, (HOST_WIDEST_INT) I)
298 #define pp_pointer(PP, P) pp_scalar (PP, "%p", P)
300 #define pp_identifier(PP, ID) pp_string (PP, (pp_translate_identifiers (PP) \
301 ? identifier_to_locale (ID) \
302 : (ID)))
305 #define pp_buffer(PP) pp_base (PP)->buffer
306 /* Clients that directly derive from pretty_printer need to override
307 this macro to return a pointer to the base pretty_printer structure. */
308 #define pp_base(PP) (PP)
310 extern void pp_construct (pretty_printer *, const char *, int);
311 extern void pp_base_set_line_maximum_length (pretty_printer *, int);
312 extern void pp_base_set_prefix (pretty_printer *, const char *);
313 extern void pp_base_destroy_prefix (pretty_printer *);
314 extern int pp_base_remaining_character_count_for_line (pretty_printer *);
315 extern void pp_base_clear_output_area (pretty_printer *);
316 extern const char *pp_base_formatted_text (pretty_printer *);
317 extern const char *pp_base_last_position_in_text (const pretty_printer *);
318 extern void pp_base_emit_prefix (pretty_printer *);
319 extern void pp_base_append_text (pretty_printer *, const char *, const char *);
321 /* If we haven't already defined a front-end-specific diagnostics
322 style, use the generic one. */
323 #ifdef GCC_DIAG_STYLE
324 #define GCC_PPDIAG_STYLE GCC_DIAG_STYLE
325 #else
326 #define GCC_PPDIAG_STYLE __gcc_diag__
327 #endif
329 /* This header may be included before diagnostics-core.h, hence the duplicate
330 definitions to allow for GCC-specific formats. */
331 #if GCC_VERSION >= 3005
332 #define ATTRIBUTE_GCC_PPDIAG(m, n) __attribute__ ((__format__ (GCC_PPDIAG_STYLE, m ,n))) ATTRIBUTE_NONNULL(m)
333 #else
334 #define ATTRIBUTE_GCC_PPDIAG(m, n) ATTRIBUTE_NONNULL(m)
335 #endif
336 extern void pp_printf (pretty_printer *, const char *, ...)
337 ATTRIBUTE_GCC_PPDIAG(2,3);
339 extern void pp_verbatim (pretty_printer *, const char *, ...)
340 ATTRIBUTE_GCC_PPDIAG(2,3);
341 extern void pp_base_flush (pretty_printer *);
342 extern void pp_base_format (pretty_printer *, text_info *);
343 extern void pp_base_output_formatted_text (pretty_printer *);
344 extern void pp_base_format_verbatim (pretty_printer *, text_info *);
346 extern void pp_base_indent (pretty_printer *);
347 extern void pp_base_newline (pretty_printer *);
348 extern void pp_base_character (pretty_printer *, int);
349 extern void pp_base_string (pretty_printer *, const char *);
350 extern void pp_write_text_to_stream (pretty_printer *);
351 extern void pp_write_text_as_dot_label_to_stream (pretty_printer *, bool);
352 extern void pp_base_maybe_space (pretty_printer *);
354 /* Switch into verbatim mode and return the old mode. */
355 static inline pp_wrapping_mode_t
356 pp_set_verbatim_wrapping_ (pretty_printer *pp)
358 pp_wrapping_mode_t oldmode = pp_wrapping_mode (pp);
359 pp_line_cutoff (pp) = 0;
360 pp_prefixing_rule (pp) = DIAGNOSTICS_SHOW_PREFIX_NEVER;
361 return oldmode;
363 #define pp_set_verbatim_wrapping(PP) pp_set_verbatim_wrapping_ (pp_base (PP))
365 extern const char *identifier_to_locale (const char *);
366 extern void *(*identifier_to_locale_alloc) (size_t);
367 extern void (*identifier_to_locale_free) (void *);
369 #endif /* GCC_PRETTY_PRINT_H */