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[/] [openrisc/] [trunk/] [gnu-old/] [gcc-4.2.2/] [gcc/] [pretty-print.c] - Blame information for rev 816

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1 38 julius
/* Various declarations for language-independent pretty-print subroutines.
2
   Copyright (C) 2003, 2004, 2005, 2007 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 3, 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 COPYING3.  If not see
19
<http://www.gnu.org/licenses/>.  */
20
 
21
#include "config.h"
22
#undef FLOAT /* This is for hpux. They should change hpux.  */
23
#undef FFS  /* Some systems define this in param.h.  */
24
#include "system.h"
25
#include "coretypes.h"
26
#include "intl.h"
27
#include "pretty-print.h"
28
#include "tree.h"
29
 
30
#define obstack_chunk_alloc xmalloc
31
#define obstack_chunk_free  free
32
 
33
/* A pointer to the formatted diagnostic message.  */
34
#define pp_formatted_text_data(PP) \
35
   ((const char *) obstack_base (pp_base (PP)->buffer->obstack))
36
 
37
/* Format an integer given by va_arg (ARG, type-specifier T) where
38
   type-specifier is a precision modifier as indicated by PREC.  F is
39
   a string used to construct the appropriate format-specifier.  */
40
#define pp_integer_with_precision(PP, ARG, PREC, T, F)       \
41
  do                                                         \
42
    switch (PREC)                                            \
43
      {                                                      \
44
      case 0:                                                \
45
        pp_scalar (PP, "%" F, va_arg (ARG, T));              \
46
        break;                                               \
47
                                                             \
48
      case 1:                                                \
49
        pp_scalar (PP, "%l" F, va_arg (ARG, long T));        \
50
        break;                                               \
51
                                                             \
52
      case 2:                                                \
53
        pp_scalar (PP, "%ll" F, va_arg (ARG, long long T));  \
54
        break;                                               \
55
                                                             \
56
      default:                                               \
57
        break;                                               \
58
      }                                                      \
59
  while (0)
60
 
61
 
62
/* Subroutine of pp_set_maximum_length.  Set up PRETTY-PRINTER's
63
   internal maximum characters per line.  */
64
static void
65
pp_set_real_maximum_length (pretty_printer *pp)
66
{
67
  /* If we're told not to wrap lines then do the obvious thing.  In case
68
     we'll emit prefix only once per message, it is appropriate
69
     not to increase unnecessarily the line-length cut-off.  */
70
  if (!pp_is_wrapping_line (pp)
71
      || pp_prefixing_rule (pp) == DIAGNOSTICS_SHOW_PREFIX_ONCE
72
      || pp_prefixing_rule (pp) == DIAGNOSTICS_SHOW_PREFIX_NEVER)
73
    pp->maximum_length = pp_line_cutoff (pp);
74
  else
75
    {
76
      int prefix_length = pp->prefix ? strlen (pp->prefix) : 0;
77
      /* If the prefix is ridiculously too long, output at least
78
         32 characters.  */
79
      if (pp_line_cutoff (pp) - prefix_length < 32)
80
        pp->maximum_length = pp_line_cutoff (pp) + 32;
81
      else
82
        pp->maximum_length = pp_line_cutoff (pp);
83
    }
84
}
85
 
86
/* Clear PRETTY-PRINTER's output state.  */
87
static inline void
88
pp_clear_state (pretty_printer *pp)
89
{
90
  pp->emitted_prefix = false;
91
  pp_indentation (pp) = 0;
92
}
93
 
94
/* Flush the formatted text of PRETTY-PRINTER onto the attached stream.  */
95
void
96
pp_write_text_to_stream (pretty_printer *pp)
97
{
98
  const char *text = pp_formatted_text (pp);
99
  fputs (text, pp->buffer->stream);
100
  pp_clear_output_area (pp);
101
}
102
 
103
/* Wrap a text delimited by START and END into PRETTY-PRINTER.  */
104
static void
105
pp_wrap_text (pretty_printer *pp, const char *start, const char *end)
106
{
107
  bool wrapping_line = pp_is_wrapping_line (pp);
108
 
109
  while (start != end)
110
    {
111
      /* Dump anything bordered by whitespaces.  */
112
      {
113
        const char *p = start;
114
        while (p != end && !ISBLANK (*p) && *p != '\n')
115
          ++p;
116
        if (wrapping_line
117
            && p - start >= pp_remaining_character_count_for_line (pp))
118
          pp_newline (pp);
119
        pp_append_text (pp, start, p);
120
        start = p;
121
      }
122
 
123
      if (start != end && ISBLANK (*start))
124
        {
125
          pp_space (pp);
126
          ++start;
127
        }
128
      if (start != end && *start == '\n')
129
        {
130
          pp_newline (pp);
131
          ++start;
132
        }
133
    }
134
}
135
 
136
/* Same as pp_wrap_text but wrap text only when in line-wrapping mode.  */
137
static inline void
138
pp_maybe_wrap_text (pretty_printer *pp, const char *start, const char *end)
139
{
140
  if (pp_is_wrapping_line (pp))
141
    pp_wrap_text (pp, start, end);
142
  else
143
    pp_append_text (pp, start, end);
144
}
145
 
146
/* Append to the output area of PRETTY-PRINTER a string specified by its
147
   STARTing character and LENGTH.  */
148
static inline void
149
pp_append_r (pretty_printer *pp, const char *start, int length)
150
{
151
  obstack_grow (pp->buffer->obstack, start, length);
152
  pp->buffer->line_length += length;
153
}
154
 
155
/* Insert enough spaces into the output area of PRETTY-PRINTER to bring
156
   the column position to the current indentation level, assuming that a
157
   newline has just been written to the buffer.  */
158
void
159
pp_base_indent (pretty_printer *pp)
160
{
161
  int n = pp_indentation (pp);
162
  int i;
163
 
164
  for (i = 0; i < n; ++i)
165
    pp_space (pp);
166
}
167
 
168
/* The following format specifiers are 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
   %<: opening quote.
182
   %>: closing quote.
183
   %': apostrophe (should only be used in untranslated messages;
184
       translations should use appropriate punctuation directly).
185
   %.*s: a substring the length of which is specified by an argument
186
         integer.
187
   %Ns: likewise, but length specified as constant in the format string.
188
   %H: location_t.
189
   %J: a decl tree, from which DECL_SOURCE_LOCATION will be recorded.
190
   Flag 'q': quote formatted text (must come immediately after '%').
191
 
192
   Arguments can be used sequentially, or through %N$ resp. *N$
193
   notation Nth argument after the format string.  If %N$ / *N$
194
   notation is used, it must be used for all arguments, except %m, %%,
195
   %<, %> and %', which may not have a number, as they do not consume
196
   an argument.  When %M$.*N$s is used, M must be N + 1.  (This may
197
   also be written %M$.*s, provided N is not otherwise used.)  The
198
   format string must have conversion specifiers with argument numbers
199
   1 up to highest argument; each argument may only be used once.
200
   A format string can have at most 30 arguments.  */
201
 
202
/* Formatting phases 1 and 2: render TEXT->format_spec plus
203
   TEXT->args_ptr into a series of chunks in PP->buffer->args[].
204
   Phase 3 is in pp_base_format_text.  */
205
 
206
void
207
pp_base_format (pretty_printer *pp, text_info *text)
208
{
209
  output_buffer *buffer = pp->buffer;
210
  const char *p;
211
  const char **args;
212
  struct chunk_info *new_chunk_array;
213
 
214
  unsigned int curarg = 0, chunk = 0, argno;
215
  pp_wrapping_mode_t old_wrapping_mode;
216
  bool any_unnumbered = false, any_numbered = false;
217
  const char **formatters[PP_NL_ARGMAX];
218
 
219
  /* Allocate a new chunk structure.  */
220
  new_chunk_array = XOBNEW (&buffer->chunk_obstack, struct chunk_info);
221
  new_chunk_array->prev = buffer->cur_chunk_array;
222
  buffer->cur_chunk_array = new_chunk_array;
223
  args = new_chunk_array->args;
224
 
225
  /* Formatting phase 1: split up TEXT->format_spec into chunks in
226
     PP->buffer->args[].  Even-numbered chunks are to be output
227
     verbatim, odd-numbered chunks are format specifiers.
228
     %m, %%, %<, %>, and %' are replaced with the appropriate text at
229
     this point.  */
230
 
231
  memset (formatters, 0, sizeof formatters);
232
 
233
  for (p = text->format_spec; *p; )
234
    {
235
      while (*p != '\0' && *p != '%')
236
        {
237
          obstack_1grow (&buffer->chunk_obstack, *p);
238
          p++;
239
        }
240
 
241
      if (*p == '\0')
242
        break;
243
 
244
      switch (*++p)
245
        {
246
        case '\0':
247
          gcc_unreachable ();
248
 
249
        case '%':
250
          obstack_1grow (&buffer->chunk_obstack, '%');
251
          p++;
252
          continue;
253
 
254
        case '<':
255
          obstack_grow (&buffer->chunk_obstack,
256
                        open_quote, strlen (open_quote));
257
          p++;
258
          continue;
259
 
260
        case '>':
261
        case '\'':
262
          obstack_grow (&buffer->chunk_obstack,
263
                        close_quote, strlen (close_quote));
264
          p++;
265
          continue;
266
 
267
        case 'm':
268
          {
269
            const char *errstr = xstrerror (text->err_no);
270
            obstack_grow (&buffer->chunk_obstack, errstr, strlen (errstr));
271
          }
272
          p++;
273
          continue;
274
 
275
        default:
276
          /* Handled in phase 2.  Terminate the plain chunk here.  */
277
          obstack_1grow (&buffer->chunk_obstack, '\0');
278
          gcc_assert (chunk < PP_NL_ARGMAX * 2);
279
          args[chunk++] = XOBFINISH (&buffer->chunk_obstack, const char *);
280
          break;
281
        }
282
 
283
      if (ISDIGIT (*p))
284
        {
285
          char *end;
286
          argno = strtoul (p, &end, 10) - 1;
287
          p = end;
288
          gcc_assert (*p == '$');
289
          p++;
290
 
291
          any_numbered = true;
292
          gcc_assert (!any_unnumbered);
293
        }
294
      else
295
        {
296
          argno = curarg++;
297
          any_unnumbered = true;
298
          gcc_assert (!any_numbered);
299
        }
300
      gcc_assert (argno < PP_NL_ARGMAX);
301
      gcc_assert (!formatters[argno]);
302
      formatters[argno] = &args[chunk];
303
      do
304
        {
305
          obstack_1grow (&buffer->chunk_obstack, *p);
306
          p++;
307
        }
308
      while (strchr ("qwl+#", p[-1]));
309
 
310
      if (p[-1] == '.')
311
        {
312
          /* We handle '%.Ns' and '%.*s' or '%M$.*N$s'
313
             (where M == N + 1).  */
314
          if (ISDIGIT (*p))
315
            {
316
              do
317
                {
318
                  obstack_1grow (&buffer->chunk_obstack, *p);
319
                  p++;
320
                }
321
              while (ISDIGIT (p[-1]));
322
              gcc_assert (p[-1] == 's');
323
            }
324
          else
325
            {
326
              gcc_assert (*p == '*');
327
              obstack_1grow (&buffer->chunk_obstack, '*');
328
              p++;
329
 
330
              if (ISDIGIT (*p))
331
                {
332
                  char *end;
333
                  unsigned int argno2 = strtoul (p, &end, 10) - 1;
334
                  p = end;
335
                  gcc_assert (argno2 == argno - 1);
336
                  gcc_assert (!any_unnumbered);
337
                  gcc_assert (*p == '$');
338
 
339
                  p++;
340
                  formatters[argno2] = formatters[argno];
341
                }
342
              else
343
                {
344
                  gcc_assert (!any_numbered);
345
                  formatters[argno+1] = formatters[argno];
346
                  curarg++;
347
                }
348
              gcc_assert (*p == 's');
349
              obstack_1grow (&buffer->chunk_obstack, 's');
350
              p++;
351
            }
352
        }
353
      if (*p == '\0')
354
        break;
355
 
356
      obstack_1grow (&buffer->chunk_obstack, '\0');
357
      gcc_assert (chunk < PP_NL_ARGMAX * 2);
358
      args[chunk++] = XOBFINISH (&buffer->chunk_obstack, const char *);
359
    }
360
 
361
  obstack_1grow (&buffer->chunk_obstack, '\0');
362
  gcc_assert (chunk < PP_NL_ARGMAX * 2);
363
  args[chunk++] = XOBFINISH (&buffer->chunk_obstack, const char *);
364
  args[chunk] = 0;
365
 
366
  /* Set output to the argument obstack, and switch line-wrapping and
367
     prefixing off.  */
368
  buffer->obstack = &buffer->chunk_obstack;
369
  old_wrapping_mode = pp_set_verbatim_wrapping (pp);
370
 
371
  /* Second phase.  Replace each formatter with the formatted text it
372
     corresponds to.  */
373
 
374
  for (argno = 0; formatters[argno]; argno++)
375
    {
376
      int precision = 0;
377
      bool wide = false;
378
      bool plus = false;
379
      bool hash = false;
380
      bool quote = false;
381
 
382
      /* We do not attempt to enforce any ordering on the modifier
383
         characters.  */
384
 
385
      for (p = *formatters[argno];; p++)
386
        {
387
          switch (*p)
388
            {
389
            case 'q':
390
              gcc_assert (!quote);
391
              quote = true;
392
              continue;
393
 
394
            case '+':
395
              gcc_assert (!plus);
396
              plus = true;
397
              continue;
398
 
399
            case '#':
400
              gcc_assert (!hash);
401
              hash = true;
402
              continue;
403
 
404
            case 'w':
405
              gcc_assert (!wide);
406
              wide = true;
407
              continue;
408
 
409
            case 'l':
410
              /* We don't support precision beyond that of "long long".  */
411
              gcc_assert (precision < 2);
412
              precision++;
413
              continue;
414
            }
415
          break;
416
        }
417
 
418
      gcc_assert (!wide || precision == 0);
419
 
420
      if (quote)
421
        pp_string (pp, open_quote);
422
 
423
      switch (*p)
424
        {
425
        case 'c':
426
          pp_character (pp, va_arg (*text->args_ptr, int));
427
          break;
428
 
429
        case 'd':
430
        case 'i':
431
          if (wide)
432
            pp_wide_integer (pp, va_arg (*text->args_ptr, HOST_WIDE_INT));
433
          else
434
            pp_integer_with_precision
435
              (pp, *text->args_ptr, precision, int, "d");
436
          break;
437
 
438
        case 'o':
439
          if (wide)
440
            pp_scalar (pp, "%" HOST_WIDE_INT_PRINT "o",
441
                       va_arg (*text->args_ptr, unsigned HOST_WIDE_INT));
442
          else
443
            pp_integer_with_precision
444
              (pp, *text->args_ptr, precision, unsigned, "o");
445
          break;
446
 
447
        case 's':
448
          pp_string (pp, va_arg (*text->args_ptr, const char *));
449
          break;
450
 
451
        case 'p':
452
          pp_pointer (pp, va_arg (*text->args_ptr, void *));
453
          break;
454
 
455
        case 'u':
456
          if (wide)
457
            pp_scalar (pp, HOST_WIDE_INT_PRINT_UNSIGNED,
458
                       va_arg (*text->args_ptr, unsigned HOST_WIDE_INT));
459
          else
460
            pp_integer_with_precision
461
              (pp, *text->args_ptr, precision, unsigned, "u");
462
          break;
463
 
464
        case 'x':
465
          if (wide)
466
            pp_scalar (pp, HOST_WIDE_INT_PRINT_HEX,
467
                       va_arg (*text->args_ptr, unsigned HOST_WIDE_INT));
468
          else
469
            pp_integer_with_precision
470
              (pp, *text->args_ptr, precision, unsigned, "x");
471
          break;
472
 
473
        case 'H':
474
          {
475
            location_t *locus = va_arg (*text->args_ptr, location_t *);
476
            gcc_assert (text->locus != NULL);
477
            *text->locus = *locus;
478
          }
479
          break;
480
 
481
        case 'J':
482
          {
483
            tree t = va_arg (*text->args_ptr, tree);
484
            gcc_assert (text->locus != NULL);
485
            *text->locus = DECL_SOURCE_LOCATION (t);
486
          }
487
          break;
488
 
489
        case '.':
490
          {
491
            int n;
492
            const char *s;
493
 
494
            /* We handle '%.Ns' and '%.*s' or '%M$.*N$s'
495
               (where M == N + 1).  The format string should be verified
496
               already from the first phase.  */
497
            p++;
498
            if (ISDIGIT (*p))
499
              {
500
                char *end;
501
                n = strtoul (p, &end, 10);
502
                p = end;
503
                gcc_assert (*p == 's');
504
              }
505
            else
506
              {
507
                gcc_assert (*p == '*');
508
                p++;
509
                gcc_assert (*p == 's');
510
                n = va_arg (*text->args_ptr, int);
511
 
512
                /* This consumes a second entry in the formatters array.  */
513
                gcc_assert (formatters[argno] == formatters[argno+1]);
514
                argno++;
515
              }
516
 
517
            s = va_arg (*text->args_ptr, const char *);
518
            pp_append_text (pp, s, s + n);
519
          }
520
          break;
521
 
522
        default:
523
          {
524
            bool ok;
525
 
526
            gcc_assert (pp_format_decoder (pp));
527
            ok = pp_format_decoder (pp) (pp, text, p,
528
                                         precision, wide, plus, hash);
529
            gcc_assert (ok);
530
          }
531
        }
532
 
533
      if (quote)
534
        pp_string (pp, close_quote);
535
 
536
      obstack_1grow (&buffer->chunk_obstack, '\0');
537
      *formatters[argno] = XOBFINISH (&buffer->chunk_obstack, const char *);
538
    }
539
 
540
#ifdef ENABLE_CHECKING
541
  for (; argno < PP_NL_ARGMAX; argno++)
542
    gcc_assert (!formatters[argno]);
543
#endif
544
 
545
  /* Revert to normal obstack and wrapping mode.  */
546
  buffer->obstack = &buffer->formatted_obstack;
547
  buffer->line_length = 0;
548
  pp_wrapping_mode (pp) = old_wrapping_mode;
549
  pp_clear_state (pp);
550
}
551
 
552
/* Format of a message pointed to by TEXT.  */
553
void
554
pp_base_output_formatted_text (pretty_printer *pp)
555
{
556
  unsigned int chunk;
557
  output_buffer *buffer = pp_buffer (pp);
558
  struct chunk_info *chunk_array = buffer->cur_chunk_array;
559
  const char **args = chunk_array->args;
560
 
561
  gcc_assert (buffer->obstack == &buffer->formatted_obstack);
562
  gcc_assert (buffer->line_length == 0);
563
 
564
  /* This is a third phase, first 2 phases done in pp_base_format_args.
565
     Now we actually print it.  */
566
  for (chunk = 0; args[chunk]; chunk++)
567
    pp_string (pp, args[chunk]);
568
 
569
  /* Deallocate the chunk structure and everything after it (i.e. the
570
     associated series of formatted strings).  */
571
  buffer->cur_chunk_array = chunk_array->prev;
572
  obstack_free (&buffer->chunk_obstack, chunk_array);
573
}
574
 
575
/* Helper subroutine of output_verbatim and verbatim. Do the appropriate
576
   settings needed by BUFFER for a verbatim formatting.  */
577
void
578
pp_base_format_verbatim (pretty_printer *pp, text_info *text)
579
{
580
  /* Set verbatim mode.  */
581
  pp_wrapping_mode_t oldmode = pp_set_verbatim_wrapping (pp);
582
 
583
  /* Do the actual formatting.  */
584
  pp_format (pp, text);
585
  pp_output_formatted_text (pp);
586
 
587
  /* Restore previous settings.  */
588
  pp_wrapping_mode (pp) = oldmode;
589
}
590
 
591
/* Flush the content of BUFFER onto the attached stream.  */
592
void
593
pp_base_flush (pretty_printer *pp)
594
{
595
  pp_write_text_to_stream (pp);
596
  pp_clear_state (pp);
597
  fputc ('\n', pp->buffer->stream);
598
  fflush (pp->buffer->stream);
599
  pp_needs_newline (pp) = false;
600
}
601
 
602
/* Sets the number of maximum characters per line PRETTY-PRINTER can
603
   output in line-wrapping mode.  A LENGTH value 0 suppresses
604
   line-wrapping.  */
605
void
606
pp_base_set_line_maximum_length (pretty_printer *pp, int length)
607
{
608
  pp_line_cutoff (pp) = length;
609
  pp_set_real_maximum_length (pp);
610
}
611
 
612
/* Clear PRETTY-PRINTER output area text info.  */
613
void
614
pp_base_clear_output_area (pretty_printer *pp)
615
{
616
  obstack_free (pp->buffer->obstack, obstack_base (pp->buffer->obstack));
617
  pp->buffer->line_length = 0;
618
}
619
 
620
/* Set PREFIX for PRETTY-PRINTER.  */
621
void
622
pp_base_set_prefix (pretty_printer *pp, const char *prefix)
623
{
624
  pp->prefix = prefix;
625
  pp_set_real_maximum_length (pp);
626
  pp->emitted_prefix = false;
627
  pp_indentation (pp) = 0;
628
}
629
 
630
/* Free PRETTY-PRINTER's prefix, a previously malloc()'d string.  */
631
void
632
pp_base_destroy_prefix (pretty_printer *pp)
633
{
634
  if (pp->prefix != NULL)
635
    {
636
      free ((char *) pp->prefix);
637
      pp->prefix = NULL;
638
    }
639
}
640
 
641
/* Write out PRETTY-PRINTER's prefix.  */
642
void
643
pp_base_emit_prefix (pretty_printer *pp)
644
{
645
  if (pp->prefix != NULL)
646
    {
647
      switch (pp_prefixing_rule (pp))
648
        {
649
        default:
650
        case DIAGNOSTICS_SHOW_PREFIX_NEVER:
651
          break;
652
 
653
        case DIAGNOSTICS_SHOW_PREFIX_ONCE:
654
          if (pp->emitted_prefix)
655
            {
656
              pp_base_indent (pp);
657
              break;
658
            }
659
          pp_indentation (pp) += 3;
660
          /* Fall through.  */
661
 
662
        case DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE:
663
          {
664
            int prefix_length = strlen (pp->prefix);
665
            pp_append_r (pp, pp->prefix, prefix_length);
666
            pp->emitted_prefix = true;
667
          }
668
          break;
669
        }
670
    }
671
}
672
 
673
/* Construct a PRETTY-PRINTER with PREFIX and of MAXIMUM_LENGTH
674
   characters per line.  */
675
void
676
pp_construct (pretty_printer *pp, const char *prefix, int maximum_length)
677
{
678
  memset (pp, 0, sizeof (pretty_printer));
679
  pp->buffer = XCNEW (output_buffer);
680
  obstack_init (&pp->buffer->chunk_obstack);
681
  obstack_init (&pp->buffer->formatted_obstack);
682
  pp->buffer->obstack = &pp->buffer->formatted_obstack;
683
  pp->buffer->stream = stderr;
684
  pp_line_cutoff (pp) = maximum_length;
685
  pp_prefixing_rule (pp) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
686
  pp_set_prefix (pp, prefix);
687
}
688
 
689
/* Append a string delimited by START and END to the output area of
690
   PRETTY-PRINTER.  No line wrapping is done.  However, if beginning a
691
   new line then emit PRETTY-PRINTER's prefix and skip any leading
692
   whitespace if appropriate.  The caller must ensure that it is
693
   safe to do so.  */
694
void
695
pp_base_append_text (pretty_printer *pp, const char *start, const char *end)
696
{
697
  /* Emit prefix and skip whitespace if we're starting a new line.  */
698
  if (pp->buffer->line_length == 0)
699
    {
700
      pp_emit_prefix (pp);
701
      if (pp_is_wrapping_line (pp))
702
        while (start != end && *start == ' ')
703
          ++start;
704
    }
705
  pp_append_r (pp, start, end - start);
706
}
707
 
708
/* Finishes constructing a NULL-terminated character string representing
709
   the PRETTY-PRINTED text.  */
710
const char *
711
pp_base_formatted_text (pretty_printer *pp)
712
{
713
  obstack_1grow (pp->buffer->obstack, '\0');
714
  return pp_formatted_text_data (pp);
715
}
716
 
717
/*  Return a pointer to the last character emitted in PRETTY-PRINTER's
718
    output area.  A NULL pointer means no character available.  */
719
const char *
720
pp_base_last_position_in_text (const pretty_printer *pp)
721
{
722
  const char *p = NULL;
723
  struct obstack *text = pp->buffer->obstack;
724
 
725
  if (obstack_base (text) != obstack_next_free (text))
726
    p = ((const char *) obstack_next_free (text)) - 1;
727
  return p;
728
}
729
 
730
/* Return the amount of characters PRETTY-PRINTER can accept to
731
   make a full line.  Meaningful only in line-wrapping mode.  */
732
int
733
pp_base_remaining_character_count_for_line (pretty_printer *pp)
734
{
735
  return pp->maximum_length - pp->buffer->line_length;
736
}
737
 
738
 
739
/* Format a message into BUFFER a la printf.  */
740
void
741
pp_printf (pretty_printer *pp, const char *msg, ...)
742
{
743
  text_info text;
744
  va_list ap;
745
 
746
  va_start (ap, msg);
747
  text.err_no = errno;
748
  text.args_ptr = &ap;
749
  text.format_spec = msg;
750
  text.locus = NULL;
751
  pp_format (pp, &text);
752
  pp_output_formatted_text (pp);
753
  va_end (ap);
754
}
755
 
756
 
757
/* Output MESSAGE verbatim into BUFFER.  */
758
void
759
pp_verbatim (pretty_printer *pp, const char *msg, ...)
760
{
761
  text_info text;
762
  va_list ap;
763
 
764
  va_start (ap, msg);
765
  text.err_no = errno;
766
  text.args_ptr = &ap;
767
  text.format_spec = msg;
768
  text.locus = NULL;
769
  pp_format_verbatim (pp, &text);
770
  va_end (ap);
771
}
772
 
773
 
774
 
775
/* Have PRETTY-PRINTER start a new line.  */
776
void
777
pp_base_newline (pretty_printer *pp)
778
{
779
  obstack_1grow (pp->buffer->obstack, '\n');
780
  pp->buffer->line_length = 0;
781
}
782
 
783
/* Have PRETTY-PRINTER add a CHARACTER.  */
784
void
785
pp_base_character (pretty_printer *pp, int c)
786
{
787
  if (pp_is_wrapping_line (pp)
788
      && pp_remaining_character_count_for_line (pp) <= 0)
789
    {
790
      pp_newline (pp);
791
      if (ISSPACE (c))
792
        return;
793
    }
794
  obstack_1grow (pp->buffer->obstack, c);
795
  ++pp->buffer->line_length;
796
}
797
 
798
/* Append a STRING to the output area of PRETTY-PRINTER; the STRING may
799
   be line-wrapped if in appropriate mode.  */
800
void
801
pp_base_string (pretty_printer *pp, const char *str)
802
{
803
  pp_maybe_wrap_text (pp, str, str + (str ? strlen (str) : 0));
804
}
805
 
806
/* Maybe print out a whitespace if needed.  */
807
 
808
void
809
pp_base_maybe_space (pretty_printer *pp)
810
{
811
  if (pp_base (pp)->padding != pp_none)
812
    {
813
      pp_space (pp);
814
      pp_base (pp)->padding = pp_none;
815
    }
816
}

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