1 /* Various declarations for language-independent pretty-print subroutines.
2 Copyright (C) 2003, 2004, 2005, 2007, 2008 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/>. */
22 #undef FLOAT /* This is for hpux. They should change hpux. */
23 #undef FFS /* Some systems define this in param.h. */
25 #include "coretypes.h"
27 #include "pretty-print.h"
35 #define obstack_chunk_alloc xmalloc
36 #define obstack_chunk_free free
38 /* A pointer to the formatted diagnostic message. */
39 #define pp_formatted_text_data(PP) \
40 ((const char *) obstack_base (pp_base (PP)->buffer->obstack))
42 /* Format an integer given by va_arg (ARG, type-specifier T) where
43 type-specifier is a precision modifier as indicated by PREC. F is
44 a string used to construct the appropriate format-specifier. */
45 #define pp_integer_with_precision(PP, ARG, PREC, T, F) \
50 pp_scalar (PP, "%" F, va_arg (ARG, T)); \
54 pp_scalar (PP, "%l" F, va_arg (ARG, long T)); \
58 pp_scalar (PP, "%" HOST_LONG_LONG_FORMAT F, va_arg (ARG, long long T)); \
67 /* Subroutine of pp_set_maximum_length. Set up PRETTY-PRINTER's
68 internal maximum characters per line. */
70 pp_set_real_maximum_length (pretty_printer *pp)
72 /* If we're told not to wrap lines then do the obvious thing. In case
73 we'll emit prefix only once per message, it is appropriate
74 not to increase unnecessarily the line-length cut-off. */
75 if (!pp_is_wrapping_line (pp)
76 || pp_prefixing_rule (pp) == DIAGNOSTICS_SHOW_PREFIX_ONCE
77 || pp_prefixing_rule (pp) == DIAGNOSTICS_SHOW_PREFIX_NEVER)
78 pp->maximum_length = pp_line_cutoff (pp);
81 int prefix_length = pp->prefix ? strlen (pp->prefix) : 0;
82 /* If the prefix is ridiculously too long, output at least
84 if (pp_line_cutoff (pp) - prefix_length < 32)
85 pp->maximum_length = pp_line_cutoff (pp) + 32;
87 pp->maximum_length = pp_line_cutoff (pp);
91 /* Clear PRETTY-PRINTER's output state. */
93 pp_clear_state (pretty_printer *pp)
95 pp->emitted_prefix = false;
96 pp_indentation (pp) = 0;
99 /* Flush the formatted text of PRETTY-PRINTER onto the attached stream. */
101 pp_write_text_to_stream (pretty_printer *pp)
103 const char *text = pp_formatted_text (pp);
104 fputs (text, pp->buffer->stream);
105 pp_clear_output_area (pp);
108 /* Wrap a text delimited by START and END into PRETTY-PRINTER. */
110 pp_wrap_text (pretty_printer *pp, const char *start, const char *end)
112 bool wrapping_line = pp_is_wrapping_line (pp);
116 /* Dump anything bordered by whitespaces. */
118 const char *p = start;
119 while (p != end && !ISBLANK (*p) && *p != '\n')
122 && p - start >= pp_remaining_character_count_for_line (pp))
124 pp_append_text (pp, start, p);
128 if (start != end && ISBLANK (*start))
133 if (start != end && *start == '\n')
141 /* Same as pp_wrap_text but wrap text only when in line-wrapping mode. */
143 pp_maybe_wrap_text (pretty_printer *pp, const char *start, const char *end)
145 if (pp_is_wrapping_line (pp))
146 pp_wrap_text (pp, start, end);
148 pp_append_text (pp, start, end);
151 /* Append to the output area of PRETTY-PRINTER a string specified by its
152 STARTing character and LENGTH. */
154 pp_append_r (pretty_printer *pp, const char *start, int length)
156 obstack_grow (pp->buffer->obstack, start, length);
157 pp->buffer->line_length += length;
160 /* Insert enough spaces into the output area of PRETTY-PRINTER to bring
161 the column position to the current indentation level, assuming that a
162 newline has just been written to the buffer. */
164 pp_base_indent (pretty_printer *pp)
166 int n = pp_indentation (pp);
169 for (i = 0; i < n; ++i)
173 /* The following format specifiers are recognized as being client independent:
174 %d, %i: (signed) integer in base ten.
175 %u: unsigned integer in base ten.
176 %o: unsigned integer in base eight.
177 %x: unsigned integer in base sixteen.
178 %ld, %li, %lo, %lu, %lx: long versions of the above.
179 %lld, %lli, %llo, %llu, %llx: long long versions.
180 %wd, %wi, %wo, %wu, %wx: HOST_WIDE_INT versions.
184 %m: strerror(text->err_no) - does not consume a value from args_ptr.
188 %': apostrophe (should only be used in untranslated messages;
189 translations should use appropriate punctuation directly).
190 %.*s: a substring the length of which is specified by an argument
192 %Ns: likewise, but length specified as constant in the format string.
193 %J: a decl tree, from which DECL_SOURCE_LOCATION will be recorded.
194 %K: a statement, from which EXPR_LOCATION and TREE_BLOCK will be recorded.
195 Flag 'q': quote formatted text (must come immediately after '%').
197 Arguments can be used sequentially, or through %N$ resp. *N$
198 notation Nth argument after the format string. If %N$ / *N$
199 notation is used, it must be used for all arguments, except %m, %%,
200 %<, %> and %', which may not have a number, as they do not consume
201 an argument. When %M$.*N$s is used, M must be N + 1. (This may
202 also be written %M$.*s, provided N is not otherwise used.) The
203 format string must have conversion specifiers with argument numbers
204 1 up to highest argument; each argument may only be used once.
205 A format string can have at most 30 arguments. */
207 /* Formatting phases 1 and 2: render TEXT->format_spec plus
208 TEXT->args_ptr into a series of chunks in PP->buffer->args[].
209 Phase 3 is in pp_base_format_text. */
212 pp_base_format (pretty_printer *pp, text_info *text)
214 output_buffer *buffer = pp->buffer;
217 struct chunk_info *new_chunk_array;
219 unsigned int curarg = 0, chunk = 0, argno;
220 pp_wrapping_mode_t old_wrapping_mode;
221 bool any_unnumbered = false, any_numbered = false;
222 const char **formatters[PP_NL_ARGMAX];
224 /* Allocate a new chunk structure. */
225 new_chunk_array = XOBNEW (&buffer->chunk_obstack, struct chunk_info);
226 new_chunk_array->prev = buffer->cur_chunk_array;
227 buffer->cur_chunk_array = new_chunk_array;
228 args = new_chunk_array->args;
230 /* Formatting phase 1: split up TEXT->format_spec into chunks in
231 PP->buffer->args[]. Even-numbered chunks are to be output
232 verbatim, odd-numbered chunks are format specifiers.
233 %m, %%, %<, %>, and %' are replaced with the appropriate text at
236 memset (formatters, 0, sizeof formatters);
238 for (p = text->format_spec; *p; )
240 while (*p != '\0' && *p != '%')
242 obstack_1grow (&buffer->chunk_obstack, *p);
255 obstack_1grow (&buffer->chunk_obstack, '%');
260 obstack_grow (&buffer->chunk_obstack,
261 open_quote, strlen (open_quote));
267 obstack_grow (&buffer->chunk_obstack,
268 close_quote, strlen (close_quote));
274 const char *errstr = xstrerror (text->err_no);
275 obstack_grow (&buffer->chunk_obstack, errstr, strlen (errstr));
281 /* Handled in phase 2. Terminate the plain chunk here. */
282 obstack_1grow (&buffer->chunk_obstack, '\0');
283 gcc_assert (chunk < PP_NL_ARGMAX * 2);
284 args[chunk++] = XOBFINISH (&buffer->chunk_obstack, const char *);
291 argno = strtoul (p, &end, 10) - 1;
293 gcc_assert (*p == '$');
297 gcc_assert (!any_unnumbered);
302 any_unnumbered = true;
303 gcc_assert (!any_numbered);
305 gcc_assert (argno < PP_NL_ARGMAX);
306 gcc_assert (!formatters[argno]);
307 formatters[argno] = &args[chunk];
310 obstack_1grow (&buffer->chunk_obstack, *p);
313 while (strchr ("qwl+#", p[-1]));
317 /* We handle '%.Ns' and '%.*s' or '%M$.*N$s'
318 (where M == N + 1). */
323 obstack_1grow (&buffer->chunk_obstack, *p);
326 while (ISDIGIT (p[-1]));
327 gcc_assert (p[-1] == 's');
331 gcc_assert (*p == '*');
332 obstack_1grow (&buffer->chunk_obstack, '*');
338 unsigned int argno2 = strtoul (p, &end, 10) - 1;
340 gcc_assert (argno2 == argno - 1);
341 gcc_assert (!any_unnumbered);
342 gcc_assert (*p == '$');
345 formatters[argno2] = formatters[argno];
349 gcc_assert (!any_numbered);
350 formatters[argno+1] = formatters[argno];
353 gcc_assert (*p == 's');
354 obstack_1grow (&buffer->chunk_obstack, 's');
361 obstack_1grow (&buffer->chunk_obstack, '\0');
362 gcc_assert (chunk < PP_NL_ARGMAX * 2);
363 args[chunk++] = XOBFINISH (&buffer->chunk_obstack, const char *);
366 obstack_1grow (&buffer->chunk_obstack, '\0');
367 gcc_assert (chunk < PP_NL_ARGMAX * 2);
368 args[chunk++] = XOBFINISH (&buffer->chunk_obstack, const char *);
371 /* Set output to the argument obstack, and switch line-wrapping and
373 buffer->obstack = &buffer->chunk_obstack;
374 old_wrapping_mode = pp_set_verbatim_wrapping (pp);
376 /* Second phase. Replace each formatter with the formatted text it
379 for (argno = 0; formatters[argno]; argno++)
387 /* We do not attempt to enforce any ordering on the modifier
390 for (p = *formatters[argno];; p++)
415 /* We don't support precision beyond that of "long long". */
416 gcc_assert (precision < 2);
423 gcc_assert (!wide || precision == 0);
426 pp_string (pp, open_quote);
431 pp_character (pp, va_arg (*text->args_ptr, int));
437 pp_wide_integer (pp, va_arg (*text->args_ptr, HOST_WIDE_INT));
439 pp_integer_with_precision
440 (pp, *text->args_ptr, precision, int, "d");
445 pp_scalar (pp, "%" HOST_WIDE_INT_PRINT "o",
446 va_arg (*text->args_ptr, unsigned HOST_WIDE_INT));
448 pp_integer_with_precision
449 (pp, *text->args_ptr, precision, unsigned, "o");
453 pp_string (pp, va_arg (*text->args_ptr, const char *));
457 pp_pointer (pp, va_arg (*text->args_ptr, void *));
462 pp_scalar (pp, HOST_WIDE_INT_PRINT_UNSIGNED,
463 va_arg (*text->args_ptr, unsigned HOST_WIDE_INT));
465 pp_integer_with_precision
466 (pp, *text->args_ptr, precision, unsigned, "u");
471 pp_scalar (pp, HOST_WIDE_INT_PRINT_HEX,
472 va_arg (*text->args_ptr, unsigned HOST_WIDE_INT));
474 pp_integer_with_precision
475 (pp, *text->args_ptr, precision, unsigned, "x");
480 tree t = va_arg (*text->args_ptr, tree);
481 gcc_assert (text->locus != NULL);
482 *text->locus = DECL_SOURCE_LOCATION (t);
488 tree t = va_arg (*text->args_ptr, tree), block;
489 gcc_assert (text->locus != NULL);
490 *text->locus = EXPR_LOCATION (t);
491 gcc_assert (text->abstract_origin != NULL);
492 block = TREE_BLOCK (t);
493 *text->abstract_origin = NULL;
495 && TREE_CODE (block) == BLOCK
496 && BLOCK_ABSTRACT_ORIGIN (block))
498 tree ao = BLOCK_ABSTRACT_ORIGIN (block);
500 while (TREE_CODE (ao) == BLOCK
501 && BLOCK_ABSTRACT_ORIGIN (ao)
502 && BLOCK_ABSTRACT_ORIGIN (ao) != ao)
503 ao = BLOCK_ABSTRACT_ORIGIN (ao);
505 if (TREE_CODE (ao) == FUNCTION_DECL)
507 *text->abstract_origin = block;
510 block = BLOCK_SUPERCONTEXT (block);
520 /* We handle '%.Ns' and '%.*s' or '%M$.*N$s'
521 (where M == N + 1). The format string should be verified
522 already from the first phase. */
527 n = strtoul (p, &end, 10);
529 gcc_assert (*p == 's');
533 gcc_assert (*p == '*');
535 gcc_assert (*p == 's');
536 n = va_arg (*text->args_ptr, int);
538 /* This consumes a second entry in the formatters array. */
539 gcc_assert (formatters[argno] == formatters[argno+1]);
543 s = va_arg (*text->args_ptr, const char *);
544 pp_append_text (pp, s, s + n);
552 gcc_assert (pp_format_decoder (pp));
553 ok = pp_format_decoder (pp) (pp, text, p,
554 precision, wide, plus, hash);
560 pp_string (pp, close_quote);
562 obstack_1grow (&buffer->chunk_obstack, '\0');
563 *formatters[argno] = XOBFINISH (&buffer->chunk_obstack, const char *);
566 #ifdef ENABLE_CHECKING
567 for (; argno < PP_NL_ARGMAX; argno++)
568 gcc_assert (!formatters[argno]);
571 /* Revert to normal obstack and wrapping mode. */
572 buffer->obstack = &buffer->formatted_obstack;
573 buffer->line_length = 0;
574 pp_wrapping_mode (pp) = old_wrapping_mode;
578 /* Format of a message pointed to by TEXT. */
580 pp_base_output_formatted_text (pretty_printer *pp)
583 output_buffer *buffer = pp_buffer (pp);
584 struct chunk_info *chunk_array = buffer->cur_chunk_array;
585 const char **args = chunk_array->args;
587 gcc_assert (buffer->obstack == &buffer->formatted_obstack);
588 gcc_assert (buffer->line_length == 0);
590 /* This is a third phase, first 2 phases done in pp_base_format_args.
591 Now we actually print it. */
592 for (chunk = 0; args[chunk]; chunk++)
593 pp_string (pp, args[chunk]);
595 /* Deallocate the chunk structure and everything after it (i.e. the
596 associated series of formatted strings). */
597 buffer->cur_chunk_array = chunk_array->prev;
598 obstack_free (&buffer->chunk_obstack, chunk_array);
601 /* Helper subroutine of output_verbatim and verbatim. Do the appropriate
602 settings needed by BUFFER for a verbatim formatting. */
604 pp_base_format_verbatim (pretty_printer *pp, text_info *text)
606 /* Set verbatim mode. */
607 pp_wrapping_mode_t oldmode = pp_set_verbatim_wrapping (pp);
609 /* Do the actual formatting. */
610 pp_format (pp, text);
611 pp_output_formatted_text (pp);
613 /* Restore previous settings. */
614 pp_wrapping_mode (pp) = oldmode;
617 /* Flush the content of BUFFER onto the attached stream. */
619 pp_base_flush (pretty_printer *pp)
621 pp_write_text_to_stream (pp);
623 fputc ('\n', pp->buffer->stream);
624 fflush (pp->buffer->stream);
625 pp_needs_newline (pp) = false;
628 /* Sets the number of maximum characters per line PRETTY-PRINTER can
629 output in line-wrapping mode. A LENGTH value 0 suppresses
632 pp_base_set_line_maximum_length (pretty_printer *pp, int length)
634 pp_line_cutoff (pp) = length;
635 pp_set_real_maximum_length (pp);
638 /* Clear PRETTY-PRINTER output area text info. */
640 pp_base_clear_output_area (pretty_printer *pp)
642 obstack_free (pp->buffer->obstack, obstack_base (pp->buffer->obstack));
643 pp->buffer->line_length = 0;
646 /* Set PREFIX for PRETTY-PRINTER. */
648 pp_base_set_prefix (pretty_printer *pp, const char *prefix)
651 pp_set_real_maximum_length (pp);
652 pp->emitted_prefix = false;
653 pp_indentation (pp) = 0;
656 /* Free PRETTY-PRINTER's prefix, a previously malloc()'d string. */
658 pp_base_destroy_prefix (pretty_printer *pp)
660 if (pp->prefix != NULL)
662 free (CONST_CAST (char *, pp->prefix));
667 /* Write out PRETTY-PRINTER's prefix. */
669 pp_base_emit_prefix (pretty_printer *pp)
671 if (pp->prefix != NULL)
673 switch (pp_prefixing_rule (pp))
676 case DIAGNOSTICS_SHOW_PREFIX_NEVER:
679 case DIAGNOSTICS_SHOW_PREFIX_ONCE:
680 if (pp->emitted_prefix)
685 pp_indentation (pp) += 3;
688 case DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE:
690 int prefix_length = strlen (pp->prefix);
691 pp_append_r (pp, pp->prefix, prefix_length);
692 pp->emitted_prefix = true;
699 /* Construct a PRETTY-PRINTER with PREFIX and of MAXIMUM_LENGTH
700 characters per line. */
702 pp_construct (pretty_printer *pp, const char *prefix, int maximum_length)
704 memset (pp, 0, sizeof (pretty_printer));
705 pp->buffer = XCNEW (output_buffer);
706 obstack_init (&pp->buffer->chunk_obstack);
707 obstack_init (&pp->buffer->formatted_obstack);
708 pp->buffer->obstack = &pp->buffer->formatted_obstack;
709 pp->buffer->stream = stderr;
710 pp_line_cutoff (pp) = maximum_length;
711 pp_prefixing_rule (pp) = DIAGNOSTICS_SHOW_PREFIX_ONCE;
712 pp_set_prefix (pp, prefix);
713 pp_translate_identifiers (pp) = true;
716 /* Append a string delimited by START and END to the output area of
717 PRETTY-PRINTER. No line wrapping is done. However, if beginning a
718 new line then emit PRETTY-PRINTER's prefix and skip any leading
719 whitespace if appropriate. The caller must ensure that it is
722 pp_base_append_text (pretty_printer *pp, const char *start, const char *end)
724 /* Emit prefix and skip whitespace if we're starting a new line. */
725 if (pp->buffer->line_length == 0)
728 if (pp_is_wrapping_line (pp))
729 while (start != end && *start == ' ')
732 pp_append_r (pp, start, end - start);
735 /* Finishes constructing a NULL-terminated character string representing
736 the PRETTY-PRINTED text. */
738 pp_base_formatted_text (pretty_printer *pp)
740 obstack_1grow (pp->buffer->obstack, '\0');
741 return pp_formatted_text_data (pp);
744 /* Return a pointer to the last character emitted in PRETTY-PRINTER's
745 output area. A NULL pointer means no character available. */
747 pp_base_last_position_in_text (const pretty_printer *pp)
749 const char *p = NULL;
750 struct obstack *text = pp->buffer->obstack;
752 if (obstack_base (text) != obstack_next_free (text))
753 p = ((const char *) obstack_next_free (text)) - 1;
757 /* Return the amount of characters PRETTY-PRINTER can accept to
758 make a full line. Meaningful only in line-wrapping mode. */
760 pp_base_remaining_character_count_for_line (pretty_printer *pp)
762 return pp->maximum_length - pp->buffer->line_length;
766 /* Format a message into BUFFER a la printf. */
768 pp_printf (pretty_printer *pp, const char *msg, ...)
776 text.format_spec = msg;
778 pp_format (pp, &text);
779 pp_output_formatted_text (pp);
784 /* Output MESSAGE verbatim into BUFFER. */
786 pp_verbatim (pretty_printer *pp, const char *msg, ...)
794 text.format_spec = msg;
796 pp_format_verbatim (pp, &text);
802 /* Have PRETTY-PRINTER start a new line. */
804 pp_base_newline (pretty_printer *pp)
806 obstack_1grow (pp->buffer->obstack, '\n');
807 pp->buffer->line_length = 0;
810 /* Have PRETTY-PRINTER add a CHARACTER. */
812 pp_base_character (pretty_printer *pp, int c)
814 if (pp_is_wrapping_line (pp)
815 && pp_remaining_character_count_for_line (pp) <= 0)
821 obstack_1grow (pp->buffer->obstack, c);
822 ++pp->buffer->line_length;
825 /* Append a STRING to the output area of PRETTY-PRINTER; the STRING may
826 be line-wrapped if in appropriate mode. */
828 pp_base_string (pretty_printer *pp, const char *str)
830 pp_maybe_wrap_text (pp, str, str + (str ? strlen (str) : 0));
833 /* Maybe print out a whitespace if needed. */
836 pp_base_maybe_space (pretty_printer *pp)
838 if (pp_base (pp)->padding != pp_none)
841 pp_base (pp)->padding = pp_none;
845 /* Print the identifier ID to PRETTY-PRINTER. */
848 pp_base_tree_identifier (pretty_printer *pp, tree id)
850 if (pp_translate_identifiers (pp))
852 const char *text = identifier_to_locale (IDENTIFIER_POINTER (id));
853 pp_append_text (pp, text, text + strlen (text));
856 pp_append_text (pp, IDENTIFIER_POINTER (id),
857 IDENTIFIER_POINTER (id) + IDENTIFIER_LENGTH (id));
860 /* The string starting at P has LEN (at least 1) bytes left; if they
861 start with a valid UTF-8 sequence, return the length of that
862 sequence and set *VALUE to the value of that sequence, and
863 otherwise return 0 and set *VALUE to (unsigned int) -1. */
866 decode_utf8_char (const unsigned char *p, size_t len, unsigned int *value)
877 for (t = *p; t & 0x80; t <<= 1)
880 if (utf8_len > len || utf8_len < 2 || utf8_len > 6)
882 *value = (unsigned int) -1;
885 ch = *p & ((1 << (7 - utf8_len)) - 1);
886 for (i = 1; i < utf8_len; i++)
888 unsigned int u = p[i];
889 if ((u & 0xC0) != 0x80)
891 *value = (unsigned int) -1;
894 ch = (ch << 6) | (u & 0x3F);
896 if ( (ch <= 0x7F && utf8_len > 1)
897 || (ch <= 0x7FF && utf8_len > 2)
898 || (ch <= 0xFFFF && utf8_len > 3)
899 || (ch <= 0x1FFFFF && utf8_len > 4)
900 || (ch <= 0x3FFFFFF && utf8_len > 5)
901 || (ch >= 0xD800 && ch <= 0xDFFF))
903 *value = (unsigned int) -1;
916 /* Given IDENT, an identifier in the internal encoding, return a
917 version of IDENT suitable for diagnostics in the locale character
918 set: either IDENT itself, or a garbage-collected string converted
919 to the locale character set and using escape sequences if not
920 representable in the locale character set or containing control
921 characters or invalid byte sequences. Existing backslashes in
922 IDENT are not doubled, so the result may not uniquely specify the
923 contents of an arbitrary byte sequence identifier. */
926 identifier_to_locale (const char *ident)
928 const unsigned char *uid = (const unsigned char *) ident;
929 size_t idlen = strlen (ident);
930 bool valid_printable_utf8 = true;
931 bool all_ascii = true;
934 for (i = 0; i < idlen;)
937 size_t utf8_len = decode_utf8_char (&uid[i], idlen - i, &c);
938 if (utf8_len == 0 || c <= 0x1F || (c >= 0x7F && c <= 0x9F))
940 valid_printable_utf8 = false;
948 /* If IDENT contains invalid UTF-8 sequences (which may occur with
949 attributes putting arbitrary byte sequences in identifiers), or
950 control characters, we use octal escape sequences for all bytes
951 outside printable ASCII. */
952 if (!valid_printable_utf8)
954 char *ret = GGC_NEWVEC (char, 4 * idlen + 1);
956 for (i = 0; i < idlen; i++)
958 if (uid[i] > 0x1F && uid[i] < 0x7F)
962 sprintf (p, "\\%03o", uid[i]);
970 /* Otherwise, if it is valid printable ASCII, or printable UTF-8
971 with the locale character set being UTF-8, IDENT is used. */
972 if (all_ascii || locale_utf8)
975 /* Otherwise IDENT is converted to the locale character set if
977 #if defined ENABLE_NLS && defined HAVE_LANGINFO_CODESET && HAVE_ICONV
978 if (locale_encoding != NULL)
980 iconv_t cd = iconv_open (locale_encoding, "UTF-8");
981 bool conversion_ok = true;
983 if (cd != (iconv_t) -1)
985 size_t ret_alloc = 4 * idlen + 1;
988 /* Repeat the whole conversion process as needed with
989 larger buffers so non-reversible transformations can
990 always be detected. */
991 ICONV_CONST char *inbuf = CONST_CAST (char *, ident);
993 size_t inbytesleft = idlen;
994 size_t outbytesleft = ret_alloc - 1;
997 ret = GGC_NEWVEC (char, ret_alloc);
1000 if (iconv (cd, 0, 0, 0, 0) == (size_t) -1)
1002 conversion_ok = false;
1006 iconv_ret = iconv (cd, &inbuf, &inbytesleft,
1007 &outbuf, &outbytesleft);
1008 if (iconv_ret == (size_t) -1 || inbytesleft != 0)
1019 conversion_ok = false;
1023 else if (iconv_ret != 0)
1025 conversion_ok = false;
1028 /* Return to initial shift state. */
1029 if (iconv (cd, 0, 0, &outbuf, &outbytesleft) == (size_t) -1)
1040 conversion_ok = false;
1054 /* Otherwise, convert non-ASCII characters in IDENT to UCNs. */
1056 char *ret = GGC_NEWVEC (char, 10 * idlen + 1);
1058 for (i = 0; i < idlen;)
1061 size_t utf8_len = decode_utf8_char (&uid[i], idlen - i, &c);
1066 sprintf (p, "\\U%08x", c);