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b6fe0bb8 GDR |
1 | /* Various declarations for language-independent pretty-print subroutines. |
2 | Copyright (C) 2003 Free Software Foundation, Inc. | |
3 | Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net> | |
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 | #include "config.h" | |
23 | #undef FLOAT /* This is for hpux. They should change hpux. */ | |
24 | #undef FFS /* Some systems define this in param.h. */ | |
25 | #include "system.h" | |
26 | #include "coretypes.h" | |
27 | #include "pretty-print.h" | |
28 | ||
29 | #define obstack_chunk_alloc xmalloc | |
30 | #define obstack_chunk_free free | |
31 | ||
32 | /* A pointer to the formatted diagnostic message. */ | |
33 | #define pp_formatted_text_data(PP) \ | |
34 | ((const char *) obstack_base (&pp_base (PP)->buffer->obstack)) | |
35 | ||
36 | /* Format an integer given by va_arg (ARG, type-specifier T) where | |
37 | type-specifier is a precision modifier as indicated by PREC. F is | |
38 | a string used to construct the appropriate format-specifier. */ | |
39 | #define pp_integer_with_precision(PP, ARG, PREC, T, F) \ | |
40 | do \ | |
41 | switch (PREC) \ | |
42 | { \ | |
43 | case 0: \ | |
44 | pp_scalar (PP, "%" F, va_arg (ARG, T)); \ | |
45 | break; \ | |
46 | \ | |
47 | case 1: \ | |
48 | pp_scalar (PP, "%l" F, va_arg (ARG, long T)); \ | |
49 | break; \ | |
50 | \ | |
51 | case 2: \ | |
52 | pp_scalar (PP, "%ll" F, va_arg (ARG, long long T)); \ | |
53 | break; \ | |
54 | \ | |
55 | default: \ | |
56 | break; \ | |
57 | } \ | |
58 | while (0) | |
59 | ||
60 | ||
61 | /* Subroutine of pp_set_maximum_length. Set up PRETTY-PRINTER's | |
62 | internal maximum characters per line. */ | |
63 | static void | |
64 | pp_set_real_maximum_length (pretty_printer *pp) | |
65 | { | |
66 | /* If we're told not to wrap lines then do the obvious thing. In case | |
67 | we'll emit prefix only once per message, it is appropriate | |
68 | not to increase unnecessarily the line-length cut-off. */ | |
69 | if (!pp_is_wrapping_line (pp) | |
70 | || pp_prefixing_rule (pp) == DIAGNOSTICS_SHOW_PREFIX_ONCE | |
71 | || pp_prefixing_rule (pp) == DIAGNOSTICS_SHOW_PREFIX_NEVER) | |
72 | pp->maximum_length = pp_line_cutoff (pp); | |
73 | else | |
74 | { | |
75 | int prefix_length = pp->prefix ? strlen (pp->prefix) : 0; | |
76 | /* If the prefix is ridiculously too long, output at least | |
77 | 32 characters. */ | |
78 | if (pp_line_cutoff (pp) - prefix_length < 32) | |
79 | pp->maximum_length = pp_line_cutoff (pp) + 32; | |
80 | else | |
81 | pp->maximum_length = pp_line_cutoff (pp); | |
82 | } | |
83 | } | |
84 | ||
85 | /* Clear PRETTY-PRINTER's output state. */ | |
86 | static inline void | |
87 | pp_clear_state (pretty_printer *pp) | |
88 | { | |
89 | pp->emitted_prefix = false; | |
90 | pp_indentation (pp) = 0; | |
91 | } | |
92 | ||
93 | /* Insert enough spaces into the output area of PRETTY-PRINTER to bring | |
94 | the column position to the current indentation level, assuming that a | |
95 | newline has just been written to the buffer. */ | |
96 | static void | |
97 | pp_indent (pretty_printer *pp) | |
98 | { | |
99 | int n = pp_indentation (pp); | |
100 | int i; | |
101 | ||
102 | for (i = 0; i < n; ++i) | |
103 | pp_space (pp); | |
104 | } | |
105 | ||
106 | /* Flush the formatted text of PRETTY-PRINTER onto the attached stream. */ | |
107 | static inline void | |
108 | pp_write_text_to_stream (pretty_printer *pp) | |
109 | { | |
110 | const char *text = pp_formatted_text (pp); | |
111 | fputs (text, pp->buffer->stream); | |
112 | pp_clear_output_area (pp); | |
113 | } | |
114 | ||
115 | /* Wrap a text delimited by START and END into PRETTY-PRINTER. */ | |
116 | static void | |
117 | pp_wrap_text (pretty_printer *pp, const char *start, const char *end) | |
118 | { | |
119 | bool wrapping_line = pp_is_wrapping_line (pp); | |
120 | ||
121 | while (start != end) | |
122 | { | |
123 | /* Dump anything bordered by whitespaces. */ | |
124 | { | |
125 | const char *p = start; | |
126 | while (p != end && !ISBLANK (*p) && *p != '\n') | |
127 | ++p; | |
128 | if (wrapping_line | |
129 | && p - start >= pp_remaining_character_count_for_line (pp)) | |
130 | pp_newline (pp); | |
131 | pp_append_text (pp, start, p); | |
132 | start = p; | |
133 | } | |
134 | ||
135 | if (start != end && ISBLANK (*start)) | |
136 | { | |
137 | pp_space (pp); | |
138 | ++start; | |
139 | } | |
140 | if (start != end && *start == '\n') | |
141 | { | |
142 | pp_newline (pp); | |
143 | ++start; | |
144 | } | |
145 | } | |
146 | } | |
147 | ||
148 | /* Same as pp_wrap_text but wrap text only when in line-wrapping mode. */ | |
149 | static inline void | |
150 | pp_maybe_wrap_text (pretty_printer *pp, const char *start, const char *end) | |
151 | { | |
152 | if (pp_is_wrapping_line (pp)) | |
153 | pp_wrap_text (pp, start, end); | |
154 | else | |
155 | pp_append_text (pp, start, end); | |
156 | } | |
157 | ||
158 | /* Append to the output area of PRETTY-PRINTER a string specified by its | |
159 | STARTing character and LENGTH. */ | |
160 | static inline void | |
161 | pp_append_r (pretty_printer *pp, const char *start, int length) | |
162 | { | |
163 | obstack_grow (&pp->buffer->obstack, start, length); | |
164 | pp->buffer->line_length += length; | |
165 | } | |
166 | ||
167 | /* Format a message pointed to by TEXT. The following format specifiers are | |
168 | recognized as being client independent: | |
169 | %d, %i: (signed) integer in base ten. | |
170 | %u: unsigned integer in base ten. | |
171 | %o: unsigned integer in base eight. | |
172 | %x: unsigned integer in base sixteen. | |
173 | %ld, %li, %lo, %lu, %lx: long versions of the above. | |
174 | %lld, %lli, %llo, %llu, %llx: long long versions. | |
175 | %wd, %wi, %wo, %wu, %wx: HOST_WIDE_INT versions. | |
176 | %c: character. | |
177 | %s: string. | |
178 | %p: pointer. | |
179 | %m: strerror(text->err_no) - does not consume a value from args_ptr. | |
180 | %%: `%'. | |
181 | %*.s: a substring the length of which is specified by an integer. | |
182 | %H: location_t. */ | |
183 | void | |
e1a4dd13 | 184 | pp_base_format_text (pretty_printer *pp, text_info *text) |
b6fe0bb8 GDR |
185 | { |
186 | for (; *text->format_spec; ++text->format_spec) | |
187 | { | |
188 | int precision = 0; | |
189 | bool wide = false; | |
190 | ||
191 | /* Ignore text. */ | |
192 | { | |
193 | const char *p = text->format_spec; | |
194 | while (*p && *p != '%') | |
195 | ++p; | |
196 | pp_wrap_text (pp, text->format_spec, p); | |
197 | text->format_spec = p; | |
198 | } | |
199 | ||
200 | if (*text->format_spec == '\0') | |
201 | break; | |
202 | ||
203 | /* We got a '%'. Parse precision modifiers, if any. */ | |
204 | switch (*++text->format_spec) | |
205 | { | |
206 | case 'w': | |
207 | wide = true; | |
208 | ++text->format_spec; | |
209 | break; | |
210 | ||
211 | case 'l': | |
212 | do | |
213 | ++precision; | |
214 | while (*++text->format_spec == 'l'); | |
215 | break; | |
216 | ||
217 | default: | |
218 | break; | |
219 | } | |
220 | /* We don't support precision behond that of "long long". */ | |
221 | if (precision > 2) | |
222 | abort(); | |
223 | ||
224 | switch (*text->format_spec) | |
225 | { | |
226 | case 'c': | |
227 | pp_character (pp, va_arg (*text->args_ptr, int)); | |
228 | break; | |
229 | ||
230 | case 'd': | |
231 | case 'i': | |
232 | if (wide) | |
233 | pp_wide_integer (pp, va_arg (*text->args_ptr, HOST_WIDE_INT)); | |
234 | else | |
235 | pp_integer_with_precision | |
236 | (pp, *text->args_ptr, precision, int, "d"); | |
237 | break; | |
238 | ||
239 | case 'o': | |
240 | if (wide) | |
241 | pp_scalar (pp, "%" HOST_WIDE_INT_PRINT "o", | |
242 | va_arg (*text->args_ptr, unsigned HOST_WIDE_INT)); | |
243 | else | |
244 | pp_integer_with_precision | |
245 | (pp, *text->args_ptr, precision, unsigned, "u"); | |
246 | break; | |
247 | ||
248 | case 's': | |
249 | pp_string (pp, va_arg (*text->args_ptr, const char *)); | |
250 | break; | |
251 | ||
252 | case 'p': | |
253 | pp_pointer (pp, va_arg (*text->args_ptr, void *)); | |
254 | break; | |
255 | ||
256 | case 'u': | |
257 | if (wide) | |
258 | pp_scalar (pp, HOST_WIDE_INT_PRINT_UNSIGNED, | |
259 | va_arg (*text->args_ptr, unsigned HOST_WIDE_INT)); | |
260 | else | |
261 | pp_integer_with_precision | |
262 | (pp, *text->args_ptr, precision, unsigned, "u"); | |
263 | break; | |
264 | ||
265 | case 'x': | |
266 | if (wide) | |
267 | pp_scalar (pp, HOST_WIDE_INT_PRINT_HEX, | |
268 | va_arg (*text->args_ptr, unsigned HOST_WIDE_INT)); | |
269 | else | |
270 | pp_integer_with_precision | |
271 | (pp, *text->args_ptr, precision, unsigned, "x"); | |
272 | break; | |
273 | ||
274 | case 'm': | |
275 | pp_string (pp, xstrerror (text->err_no)); | |
276 | break; | |
277 | ||
278 | case '%': | |
279 | pp_character (pp, '%'); | |
280 | break; | |
281 | ||
282 | case 'H': | |
283 | { | |
284 | const location_t *locus = va_arg (*text->args_ptr, location_t *); | |
285 | pp_string (pp, "file '"); | |
286 | pp_string (pp, locus->file); | |
287 | pp_string (pp, "', line "); | |
288 | pp_decimal_int (pp, locus->line); | |
289 | } | |
290 | break; | |
291 | ||
292 | case '.': | |
293 | { | |
294 | int n; | |
295 | const char *s; | |
296 | /* We handle no precision specifier but `%.*s'. */ | |
297 | if (*++text->format_spec != '*') | |
298 | abort (); | |
299 | else if (*++text->format_spec != 's') | |
300 | abort (); | |
301 | n = va_arg (*text->args_ptr, int); | |
302 | s = va_arg (*text->args_ptr, const char *); | |
303 | pp_append_text (pp, s, s + n); | |
304 | } | |
305 | break; | |
306 | ||
307 | default: | |
308 | if (!pp_format_decoder (pp) || !(*pp_format_decoder (pp)) (pp, text)) | |
309 | { | |
310 | /* Hmmm. The client failed to install a format translator | |
311 | but called us with an unrecognized format. Or, maybe, the | |
312 | translated string just contains an invalid format, or | |
313 | has formats in the wrong order. Sorry. */ | |
314 | abort (); | |
315 | } | |
316 | } | |
317 | } | |
318 | } | |
319 | ||
320 | /* Helper subroutine of output_verbatim and verbatim. Do the appropriate | |
321 | settings needed by BUFFER for a verbatim formatting. */ | |
322 | void | |
e1a4dd13 | 323 | pp_base_format_verbatim (pretty_printer *pp, text_info *text) |
b6fe0bb8 GDR |
324 | { |
325 | diagnostic_prefixing_rule_t rule = pp_prefixing_rule (pp); | |
326 | int line_cutoff = pp_line_cutoff (pp); | |
327 | ||
328 | /* Set verbatim mode. */ | |
329 | pp->prefixing_rule = DIAGNOSTICS_SHOW_PREFIX_NEVER; | |
330 | pp_line_cutoff (pp) = 0; | |
331 | /* Do the actual formatting. */ | |
332 | pp_format_text (pp, text); | |
333 | /* Restore previous settings. */ | |
334 | pp_prefixing_rule (pp) = rule; | |
335 | pp_line_cutoff (pp) = line_cutoff; | |
336 | } | |
337 | ||
338 | /* Flush the content of BUFFER onto the attached stream. */ | |
339 | void | |
e1a4dd13 | 340 | pp_base_flush (pretty_printer *pp) |
b6fe0bb8 GDR |
341 | { |
342 | pp_write_text_to_stream (pp); | |
343 | pp_clear_state (pp); | |
344 | fputc ('\n', pp->buffer->stream); | |
345 | fflush (pp->buffer->stream); | |
346 | } | |
347 | ||
348 | /* Sets the number of maximum characters per line PRETTY-PRINTER can | |
349 | output in line-wrapping mode. A LENGTH value 0 suppresses | |
350 | line-wrapping. */ | |
351 | void | |
e1a4dd13 | 352 | pp_base_set_line_maximum_length (pretty_printer *pp, int length) |
b6fe0bb8 GDR |
353 | { |
354 | pp_line_cutoff (pp) = length; | |
355 | pp_set_real_maximum_length (pp); | |
356 | } | |
357 | ||
358 | /* Clear PRETTY-PRINTER output area text info. */ | |
359 | void | |
e1a4dd13 | 360 | pp_base_clear_output_area (pretty_printer *pp) |
b6fe0bb8 GDR |
361 | { |
362 | obstack_free (&pp->buffer->obstack, obstack_base (&pp->buffer->obstack)); | |
363 | pp->buffer->line_length = 0; | |
364 | } | |
365 | ||
366 | /* Set PREFIX for PRETTY-PRINTER. */ | |
367 | void | |
e1a4dd13 | 368 | pp_base_set_prefix (pretty_printer *pp, const char *prefix) |
b6fe0bb8 GDR |
369 | { |
370 | pp->prefix = prefix; | |
371 | pp_set_real_maximum_length (pp); | |
372 | pp->emitted_prefix = false; | |
373 | pp_indentation (pp) = 0; | |
374 | } | |
375 | ||
376 | /* Free PRETTY-PRINTER's prefix, a previously malloc()'d string. */ | |
377 | void | |
e1a4dd13 | 378 | pp_base_destroy_prefix (pretty_printer *pp) |
b6fe0bb8 GDR |
379 | { |
380 | if (pp->prefix != NULL) | |
381 | { | |
382 | free ((char *) pp->prefix); | |
383 | pp->prefix = NULL; | |
384 | } | |
385 | } | |
386 | ||
387 | /* Write out PRETTY-PRINTER's prefix. */ | |
388 | void | |
e1a4dd13 | 389 | pp_base_emit_prefix (pretty_printer *pp) |
b6fe0bb8 GDR |
390 | { |
391 | if (pp->prefix != NULL) | |
392 | { | |
393 | switch (pp_prefixing_rule (pp)) | |
394 | { | |
395 | default: | |
396 | case DIAGNOSTICS_SHOW_PREFIX_NEVER: | |
397 | break; | |
398 | ||
399 | case DIAGNOSTICS_SHOW_PREFIX_ONCE: | |
400 | if (pp->emitted_prefix) | |
401 | { | |
402 | pp_indent (pp); | |
403 | break; | |
404 | } | |
405 | pp_indentation (pp) += 3; | |
406 | /* Fall through. */ | |
407 | ||
408 | case DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE: | |
409 | { | |
410 | int prefix_length = strlen (pp->prefix); | |
411 | pp_append_r (pp, pp->prefix, prefix_length); | |
412 | pp->emitted_prefix = true; | |
413 | } | |
414 | break; | |
415 | } | |
416 | } | |
417 | } | |
418 | ||
419 | /* Construct a PRETTY-PRINTER with PREFIX and of MAXIMUM_LENGTH | |
420 | characters per line. */ | |
421 | void | |
422 | pp_construct (pretty_printer *pp, const char *prefix, int maximum_length) | |
423 | { | |
424 | memset (pp, 0, sizeof (pretty_printer)); | |
425 | pp->buffer = xmalloc (sizeof (output_buffer)); | |
426 | obstack_init (&pp->buffer->obstack); | |
427 | pp->buffer->stream = stderr; | |
428 | pp_line_cutoff (pp) = maximum_length; | |
429 | pp_prefixing_rule (pp) = DIAGNOSTICS_SHOW_PREFIX_ONCE; | |
430 | pp_set_prefix (pp, prefix); | |
431 | } | |
432 | ||
433 | /* Append a string delimited by START and END to the output area of | |
434 | PRETTY-PRINTER. No line wrapping is done. However, if beginning a | |
435 | new line then emit PRETTY-PRINTER's prefix and skip any leading | |
436 | whitespace if appropriate. The caller must ensure that it is | |
437 | safe to do so. */ | |
438 | void | |
e1a4dd13 | 439 | pp_base_append_text (pretty_printer *pp, const char *start, const char *end) |
b6fe0bb8 GDR |
440 | { |
441 | /* Emit prefix and skip whitespace if we're starting a new line. */ | |
442 | if (pp->buffer->line_length == 0) | |
443 | { | |
444 | pp_emit_prefix (pp); | |
445 | if (pp_is_wrapping_line (pp)) | |
446 | while (start != end && *start == ' ') | |
447 | ++start; | |
448 | } | |
449 | pp_append_r (pp, start, end - start); | |
450 | } | |
451 | ||
452 | /* Finishes constructing a NULL-terminated character string representing | |
453 | the PRETTY-PRINTED text. */ | |
454 | const char * | |
e1a4dd13 | 455 | pp_base_formatted_text (pretty_printer *pp) |
b6fe0bb8 GDR |
456 | { |
457 | obstack_1grow (&pp->buffer->obstack, '\0'); | |
458 | return pp_formatted_text_data (pp); | |
459 | } | |
460 | ||
461 | /* Return a pointer to the last character emitted in PRETTY-PRINTER's | |
462 | output area. A NULL pointer means no character available. */ | |
463 | const char * | |
e1a4dd13 | 464 | pp_base_last_position_in_text (const pretty_printer *pp) |
b6fe0bb8 GDR |
465 | { |
466 | const char *p = NULL; | |
467 | struct obstack *text = &pp->buffer->obstack; | |
468 | ||
469 | if (obstack_base (text) != obstack_next_free (text)) | |
470 | p = ((const char *) obstack_next_free (text)) - 1; | |
471 | return p; | |
472 | } | |
473 | ||
474 | /* Return the amount of characters PRETTY-PRINTER can accept to | |
475 | make a full line. Meaningfull only in line-wrapping mode. */ | |
476 | int | |
e1a4dd13 | 477 | pp_base_remaining_character_count_for_line (pretty_printer *pp) |
b6fe0bb8 GDR |
478 | { |
479 | return pp->maximum_length - pp->buffer->line_length; | |
480 | } | |
481 | ||
482 | ||
483 | /* Format a message into BUFFER a la printf. */ | |
484 | void | |
485 | pp_printf (pretty_printer *pp, const char *msg, ...) | |
486 | { | |
487 | text_info text; | |
488 | va_list ap; | |
489 | ||
490 | va_start (ap, msg); | |
491 | text.err_no = errno; | |
492 | text.args_ptr = ≈ | |
493 | text.format_spec = msg; | |
494 | pp_format_text (pp, &text); | |
495 | va_end (ap); | |
496 | } | |
497 | ||
498 | ||
499 | /* Output MESSAGE verbatim into BUFFER. */ | |
500 | void | |
501 | pp_verbatim (pretty_printer *pp, const char *msg, ...) | |
502 | { | |
503 | text_info text; | |
504 | va_list ap; | |
505 | ||
506 | va_start (ap, msg); | |
507 | text.err_no = errno; | |
508 | text.args_ptr = ≈ | |
509 | text.format_spec = msg; | |
510 | pp_format_verbatim (pp, &text); | |
511 | va_end (ap); | |
512 | } | |
513 | ||
514 | ||
515 | ||
516 | /* Have PRETTY-PRINTER start a new line. */ | |
517 | void | |
8f7ace48 | 518 | pp_base_newline (pretty_printer *pp) |
b6fe0bb8 GDR |
519 | { |
520 | obstack_1grow (&pp->buffer->obstack, '\n'); | |
521 | pp->buffer->line_length = 0; | |
522 | } | |
523 | ||
524 | /* Have PRETTY-PRINTER add a CHARACTER. */ | |
525 | void | |
8f7ace48 | 526 | pp_base_character (pretty_printer *pp, int c) |
b6fe0bb8 GDR |
527 | { |
528 | if (pp_is_wrapping_line (pp) | |
529 | && pp_remaining_character_count_for_line (pp) <= 0) | |
530 | { | |
531 | pp_newline (pp); | |
532 | if (ISSPACE (c)) | |
533 | return; | |
534 | } | |
535 | obstack_1grow (&pp->buffer->obstack, c); | |
536 | ++pp->buffer->line_length; | |
537 | } | |
538 | ||
539 | /* Append a STRING to the output area of PRETTY-PRINTER; the STRING may | |
540 | be line-wrapped if in appropriate mode. */ | |
541 | void | |
8f7ace48 | 542 | pp_base_string (pretty_printer *pp, const char *str) |
b6fe0bb8 GDR |
543 | { |
544 | pp_maybe_wrap_text (pp, str, str + (str ? strlen (str) : 0)); | |
545 | } | |
546 | ||
547 |