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
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
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
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. */
34 const char *format_spec;
36 int err_no; /* for %m */
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
46 enum diagnostic_prefixing_rule_t
48 DIAGNOSTICS_SHOW_PREFIX_ONCE = 0x0,
49 DIAGNOSTICS_SHOW_PREFIX_NEVER = 0x1,
50 DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE = 0x2
53 /* The chunk_info data structure forms a stack of the results from the
54 first phase of formatting (pp_format) which have not yet been
55 output (pp_output_formatted_text). A stack is necessary because
56 the diagnostic starter may decide to generate its own output by way
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. */
78 /* Obstack where the text is built up. */
79 struct obstack formatted_obstack;
81 /* Obstack containing a chunked representation of the format
82 specification plus arguments. */
83 struct obstack chunk_obstack;
85 /* Currently active obstack: one of the above two. This is used so
86 that the text formatters don't need to know which phase we're in. */
87 struct obstack *obstack;
89 /* Stack of chunk arrays. These come from the chunk_obstack. */
90 struct chunk_info *cur_chunk_array;
92 /* Where to output formatted text. */
95 /* The amount of characters output so far. */
98 /* This must be large enough to hold any printed integer or
99 floating-point value. */
100 char digit_buffer[128];
103 /* The type of pretty-printer flags passed to clients. */
104 typedef unsigned int pp_flags;
108 pp_none, pp_before, pp_after
111 /* Structure for switching in and out of verbatim mode in a convenient
113 struct pp_wrapping_mode_t
115 /* Current prefixing rule. */
116 diagnostic_prefixing_rule_t rule;
118 /* The ideal upper bound of number of characters per line, as suggested
123 /* Maximum characters per line in automatic line wrapping mode.
124 Zero means don't wrap lines. */
125 #define pp_line_cutoff(PP) (PP)->wrapping.line_cutoff
127 /* Prefixing rule used in formatting a diagnostic message. */
128 #define pp_prefixing_rule(PP) (PP)->wrapping.rule
130 /* Get or set the wrapping mode as a single entity. */
131 #define pp_wrapping_mode(PP) (PP)->wrapping
133 /* The type of a hook that formats client-specific data onto a pretty_pinter.
134 A client-supplied formatter returns true if everything goes well,
135 otherwise it returns false. */
136 typedef bool (*printer_fn) (pretty_printer *, text_info *, const char *,
137 int, bool, bool, bool);
139 /* Client supplied function used to decode formats. */
140 #define pp_format_decoder(PP) (PP)->format_decoder
142 /* TRUE if a newline character needs to be added before further
144 #define pp_needs_newline(PP) (PP)->need_newline
146 /* True if PRETTY-PRINTER is in line-wrapping mode. */
147 #define pp_is_wrapping_line(PP) (pp_line_cutoff (PP) > 0)
149 /* The amount of whitespace to be emitted when starting a new line. */
150 #define pp_indentation(PP) (PP)->indent_skip
152 /* True if identifiers are translated to the locale character set on
154 #define pp_translate_identifiers(PP) (PP)->translate_identifiers
156 /* True if colors should be shown. */
157 #define pp_show_color(PP) (PP)->show_color
159 /* The data structure that contains the bare minimum required to do
160 proper pretty-printing. Clients may derived from this structure
161 and add additional fields they need. */
162 struct pretty_printer
164 // Default construct a pretty printer with specified prefix
165 // and a maximum line length cut off limit.
166 explicit pretty_printer (const char* = NULL, int = 0);
168 /* Where we print external representation of ENTITY. */
169 output_buffer *buffer;
171 /* The prefix for each new line. */
174 /* Where to put whitespace around the entity being formatted. */
177 /* The real upper bound of number of characters per line, taking into
178 account the case of a very very looong prefix. */
181 /* Indentation count. */
184 /* Current wrapping mode. */
185 pp_wrapping_mode_t wrapping;
187 /* If non-NULL, this function formats a TEXT into the BUFFER. When called,
188 TEXT->format_spec points to a format code. FORMAT_DECODER should call
189 pp_string (and related functions) to add data to the BUFFER.
190 FORMAT_DECODER can read arguments from *TEXT->args_pts using VA_ARG.
191 If the BUFFER needs additional characters from the format string, it
192 should advance the TEXT->format_spec as it goes. When FORMAT_DECODER
193 returns, TEXT->format_spec should point to the last character processed.
195 printer_fn format_decoder;
197 /* Nonzero if current PREFIX was emitted at least once. */
200 /* Nonzero means one should emit a newline before outputting anything. */
203 /* Nonzero means identifiers are translated to the locale character
205 bool translate_identifiers;
207 /* Nonzero means that text should be colorized. */
211 static inline const char *
212 pp_get_prefix (const pretty_printer *pp) { return pp->prefix; }
214 #define pp_space(PP) pp_character (PP, ' ')
215 #define pp_left_paren(PP) pp_character (PP, '(')
216 #define pp_right_paren(PP) pp_character (PP, ')')
217 #define pp_left_bracket(PP) pp_character (PP, '[')
218 #define pp_right_bracket(PP) pp_character (PP, ']')
219 #define pp_left_brace(PP) pp_character (PP, '{')
220 #define pp_right_brace(PP) pp_character (PP, '}')
221 #define pp_semicolon(PP) pp_character (PP, ';')
222 #define pp_comma(PP) pp_character (PP, ',')
223 #define pp_dot(PP) pp_character (PP, '.')
224 #define pp_colon(PP) pp_character (PP, ':')
225 #define pp_colon_colon(PP) pp_string (PP, "::")
226 #define pp_arrow(PP) pp_string (PP, "->")
227 #define pp_equal(PP) pp_character (PP, '=')
228 #define pp_question(PP) pp_character (PP, '?')
229 #define pp_bar(PP) pp_character (PP, '|')
230 #define pp_bar_bar(PP) pp_string (PP, "||")
231 #define pp_carret(PP) pp_character (PP, '^')
232 #define pp_ampersand(PP) pp_character (PP, '&')
233 #define pp_ampersand_ampersand(PP) pp_string (PP, "&&")
234 #define pp_less(PP) pp_character (PP, '<')
235 #define pp_less_equal(PP) pp_string (PP, "<=")
236 #define pp_greater(PP) pp_character (PP, '>')
237 #define pp_greater_equal(PP) pp_string (PP, ">=")
238 #define pp_plus(PP) pp_character (PP, '+')
239 #define pp_minus(PP) pp_character (PP, '-')
240 #define pp_star(PP) pp_character (PP, '*')
241 #define pp_slash(PP) pp_character (PP, '/')
242 #define pp_modulo(PP) pp_character (PP, '%')
243 #define pp_exclamation(PP) pp_character (PP, '!')
244 #define pp_complement(PP) pp_character (PP, '~')
245 #define pp_quote(PP) pp_character (PP, '\'')
246 #define pp_backquote(PP) pp_character (PP, '`')
247 #define pp_doublequote(PP) pp_character (PP, '"')
248 #define pp_underscore(PP) pp_character (PP, '_')
249 #define pp_maybe_newline_and_indent(PP, N) \
250 if (pp_needs_newline (PP)) pp_newline_and_indent (PP, N)
251 #define pp_scalar(PP, FORMAT, SCALAR) \
254 sprintf (pp_buffer (PP)->digit_buffer, FORMAT, SCALAR); \
255 pp_string (PP, pp_buffer (PP)->digit_buffer); \
258 #define pp_decimal_int(PP, I) pp_scalar (PP, "%d", I)
259 #define pp_unsigned_wide_integer(PP, I) \
260 pp_scalar (PP, HOST_WIDE_INT_PRINT_UNSIGNED, (unsigned HOST_WIDE_INT) I)
261 #define pp_wide_integer(PP, I) \
262 pp_scalar (PP, HOST_WIDE_INT_PRINT_DEC, (HOST_WIDE_INT) I)
263 #define pp_widest_integer(PP, I) \
264 pp_scalar (PP, HOST_WIDEST_INT_PRINT_DEC, (HOST_WIDEST_INT) I)
265 #define pp_pointer(PP, P) pp_scalar (PP, "%p", P)
267 #define pp_identifier(PP, ID) pp_string (PP, (pp_translate_identifiers (PP) \
268 ? identifier_to_locale (ID) \
272 #define pp_buffer(PP) (PP)->buffer
274 extern void pp_set_line_maximum_length (pretty_printer *, int);
275 extern void pp_set_prefix (pretty_printer *, const char *);
276 extern void pp_destroy_prefix (pretty_printer *);
277 extern int pp_remaining_character_count_for_line (pretty_printer *);
278 extern void pp_clear_output_area (pretty_printer *);
279 extern const char *pp_formatted_text (pretty_printer *);
280 extern const char *pp_last_position_in_text (const pretty_printer *);
281 extern void pp_emit_prefix (pretty_printer *);
282 extern void pp_append_text (pretty_printer *, const char *, const char *);
283 extern void pp_newline_and_flush (pretty_printer *);
284 extern void pp_newline_and_indent (pretty_printer *, int);
285 extern void pp_separate_with (pretty_printer *, char);
287 /* If we haven't already defined a front-end-specific diagnostics
288 style, use the generic one. */
289 #ifdef GCC_DIAG_STYLE
290 #define GCC_PPDIAG_STYLE GCC_DIAG_STYLE
292 #define GCC_PPDIAG_STYLE __gcc_diag__
295 /* This header may be included before diagnostics-core.h, hence the duplicate
296 definitions to allow for GCC-specific formats. */
297 #if GCC_VERSION >= 3005
298 #define ATTRIBUTE_GCC_PPDIAG(m, n) __attribute__ ((__format__ (GCC_PPDIAG_STYLE, m ,n))) ATTRIBUTE_NONNULL(m)
300 #define ATTRIBUTE_GCC_PPDIAG(m, n) ATTRIBUTE_NONNULL(m)
302 extern void pp_printf (pretty_printer *, const char *, ...)
303 ATTRIBUTE_GCC_PPDIAG(2,3);
305 extern void pp_verbatim (pretty_printer *, const char *, ...)
306 ATTRIBUTE_GCC_PPDIAG(2,3);
307 extern void pp_flush (pretty_printer *);
308 extern void pp_format (pretty_printer *, text_info *);
309 extern void pp_output_formatted_text (pretty_printer *);
310 extern void pp_format_verbatim (pretty_printer *, text_info *);
312 extern void pp_indent (pretty_printer *);
313 extern void pp_newline (pretty_printer *);
314 extern void pp_character (pretty_printer *, int);
315 extern void pp_string (pretty_printer *, const char *);
316 extern void pp_write_text_to_stream (pretty_printer *);
317 extern void pp_write_text_as_dot_label_to_stream (pretty_printer *, bool);
318 extern void pp_maybe_space (pretty_printer *);
320 /* Switch into verbatim mode and return the old mode. */
321 static inline pp_wrapping_mode_t
322 pp_set_verbatim_wrapping_ (pretty_printer *pp)
324 pp_wrapping_mode_t oldmode = pp_wrapping_mode (pp);
325 pp_line_cutoff (pp) = 0;
326 pp_prefixing_rule (pp) = DIAGNOSTICS_SHOW_PREFIX_NEVER;
329 #define pp_set_verbatim_wrapping(PP) pp_set_verbatim_wrapping_ (PP)
331 extern const char *identifier_to_locale (const char *);
332 extern void *(*identifier_to_locale_alloc) (size_t);
333 extern void (*identifier_to_locale_free) (void *);
335 #endif /* GCC_PRETTY_PRINT_H */