URL
https://opencores.org/ocsvn/openrisc_me/openrisc_me/trunk
Subversion Repositories openrisc_me
[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.5.1/] [gcc/] [pretty-print.c] - Rev 287
Go to most recent revision | Compare with Previous | Blame | View Log
/* Various declarations for language-independent pretty-print subroutines. Copyright (C) 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc. Contributed by Gabriel Dos Reis <gdr@integrable-solutions.net> This file is part of GCC. GCC is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3, or (at your option) any later version. GCC is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ #include "config.h" #undef FLOAT /* This is for hpux. They should change hpux. */ #undef FFS /* Some systems define this in param.h. */ #include "system.h" #include "coretypes.h" #include "intl.h" #include "pretty-print.h" #include "tree.h" #include "ggc.h" #if HAVE_ICONV #include <iconv.h> #endif #define obstack_chunk_alloc xmalloc #define obstack_chunk_free free /* A pointer to the formatted diagnostic message. */ #define pp_formatted_text_data(PP) \ ((const char *) obstack_base (pp_base (PP)->buffer->obstack)) /* Format an integer given by va_arg (ARG, type-specifier T) where type-specifier is a precision modifier as indicated by PREC. F is a string used to construct the appropriate format-specifier. */ #define pp_integer_with_precision(PP, ARG, PREC, T, F) \ do \ switch (PREC) \ { \ case 0: \ pp_scalar (PP, "%" F, va_arg (ARG, T)); \ break; \ \ case 1: \ pp_scalar (PP, "%l" F, va_arg (ARG, long T)); \ break; \ \ case 2: \ pp_scalar (PP, "%" HOST_LONG_LONG_FORMAT F, va_arg (ARG, long long T)); \ break; \ \ default: \ break; \ } \ while (0) /* Subroutine of pp_set_maximum_length. Set up PRETTY-PRINTER's internal maximum characters per line. */ static void pp_set_real_maximum_length (pretty_printer *pp) { /* If we're told not to wrap lines then do the obvious thing. In case we'll emit prefix only once per message, it is appropriate not to increase unnecessarily the line-length cut-off. */ if (!pp_is_wrapping_line (pp) || pp_prefixing_rule (pp) == DIAGNOSTICS_SHOW_PREFIX_ONCE || pp_prefixing_rule (pp) == DIAGNOSTICS_SHOW_PREFIX_NEVER) pp->maximum_length = pp_line_cutoff (pp); else { int prefix_length = pp->prefix ? strlen (pp->prefix) : 0; /* If the prefix is ridiculously too long, output at least 32 characters. */ if (pp_line_cutoff (pp) - prefix_length < 32) pp->maximum_length = pp_line_cutoff (pp) + 32; else pp->maximum_length = pp_line_cutoff (pp); } } /* Clear PRETTY-PRINTER's output state. */ static inline void pp_clear_state (pretty_printer *pp) { pp->emitted_prefix = false; pp_indentation (pp) = 0; } /* Flush the formatted text of PRETTY-PRINTER onto the attached stream. */ void pp_write_text_to_stream (pretty_printer *pp) { const char *text = pp_formatted_text (pp); fputs (text, pp->buffer->stream); pp_clear_output_area (pp); } /* Wrap a text delimited by START and END into PRETTY-PRINTER. */ static void pp_wrap_text (pretty_printer *pp, const char *start, const char *end) { bool wrapping_line = pp_is_wrapping_line (pp); while (start != end) { /* Dump anything bordered by whitespaces. */ { const char *p = start; while (p != end && !ISBLANK (*p) && *p != '\n') ++p; if (wrapping_line && p - start >= pp_remaining_character_count_for_line (pp)) pp_newline (pp); pp_append_text (pp, start, p); start = p; } if (start != end && ISBLANK (*start)) { pp_space (pp); ++start; } if (start != end && *start == '\n') { pp_newline (pp); ++start; } } } /* Same as pp_wrap_text but wrap text only when in line-wrapping mode. */ static inline void pp_maybe_wrap_text (pretty_printer *pp, const char *start, const char *end) { if (pp_is_wrapping_line (pp)) pp_wrap_text (pp, start, end); else pp_append_text (pp, start, end); } /* Append to the output area of PRETTY-PRINTER a string specified by its STARTing character and LENGTH. */ static inline void pp_append_r (pretty_printer *pp, const char *start, int length) { obstack_grow (pp->buffer->obstack, start, length); pp->buffer->line_length += length; } /* Insert enough spaces into the output area of PRETTY-PRINTER to bring the column position to the current indentation level, assuming that a newline has just been written to the buffer. */ void pp_base_indent (pretty_printer *pp) { int n = pp_indentation (pp); int i; for (i = 0; i < n; ++i) pp_space (pp); } /* The following format specifiers are recognized as being client independent: %d, %i: (signed) integer in base ten. %u: unsigned integer in base ten. %o: unsigned integer in base eight. %x: unsigned integer in base sixteen. %ld, %li, %lo, %lu, %lx: long versions of the above. %lld, %lli, %llo, %llu, %llx: long long versions. %wd, %wi, %wo, %wu, %wx: HOST_WIDE_INT versions. %c: character. %s: string. %p: pointer. %m: strerror(text->err_no) - does not consume a value from args_ptr. %%: '%'. %<: opening quote. %>: closing quote. %': apostrophe (should only be used in untranslated messages; translations should use appropriate punctuation directly). %.*s: a substring the length of which is specified by an argument integer. %Ns: likewise, but length specified as constant in the format string. %K: a statement, from which EXPR_LOCATION and TREE_BLOCK will be recorded. Flag 'q': quote formatted text (must come immediately after '%'). Arguments can be used sequentially, or through %N$ resp. *N$ notation Nth argument after the format string. If %N$ / *N$ notation is used, it must be used for all arguments, except %m, %%, %<, %> and %', which may not have a number, as they do not consume an argument. When %M$.*N$s is used, M must be N + 1. (This may also be written %M$.*s, provided N is not otherwise used.) The format string must have conversion specifiers with argument numbers 1 up to highest argument; each argument may only be used once. A format string can have at most 30 arguments. */ /* Formatting phases 1 and 2: render TEXT->format_spec plus TEXT->args_ptr into a series of chunks in PP->buffer->args[]. Phase 3 is in pp_base_format_text. */ void pp_base_format (pretty_printer *pp, text_info *text) { output_buffer *buffer = pp->buffer; const char *p; const char **args; struct chunk_info *new_chunk_array; unsigned int curarg = 0, chunk = 0, argno; pp_wrapping_mode_t old_wrapping_mode; bool any_unnumbered = false, any_numbered = false; const char **formatters[PP_NL_ARGMAX]; /* Allocate a new chunk structure. */ new_chunk_array = XOBNEW (&buffer->chunk_obstack, struct chunk_info); new_chunk_array->prev = buffer->cur_chunk_array; buffer->cur_chunk_array = new_chunk_array; args = new_chunk_array->args; /* Formatting phase 1: split up TEXT->format_spec into chunks in PP->buffer->args[]. Even-numbered chunks are to be output verbatim, odd-numbered chunks are format specifiers. %m, %%, %<, %>, and %' are replaced with the appropriate text at this point. */ memset (formatters, 0, sizeof formatters); for (p = text->format_spec; *p; ) { while (*p != '\0' && *p != '%') { obstack_1grow (&buffer->chunk_obstack, *p); p++; } if (*p == '\0') break; switch (*++p) { case '\0': gcc_unreachable (); case '%': obstack_1grow (&buffer->chunk_obstack, '%'); p++; continue; case '<': obstack_grow (&buffer->chunk_obstack, open_quote, strlen (open_quote)); p++; continue; case '>': case '\'': obstack_grow (&buffer->chunk_obstack, close_quote, strlen (close_quote)); p++; continue; case 'm': { const char *errstr = xstrerror (text->err_no); obstack_grow (&buffer->chunk_obstack, errstr, strlen (errstr)); } p++; continue; default: /* Handled in phase 2. Terminate the plain chunk here. */ obstack_1grow (&buffer->chunk_obstack, '\0'); gcc_assert (chunk < PP_NL_ARGMAX * 2); args[chunk++] = XOBFINISH (&buffer->chunk_obstack, const char *); break; } if (ISDIGIT (*p)) { char *end; argno = strtoul (p, &end, 10) - 1; p = end; gcc_assert (*p == '$'); p++; any_numbered = true; gcc_assert (!any_unnumbered); } else { argno = curarg++; any_unnumbered = true; gcc_assert (!any_numbered); } gcc_assert (argno < PP_NL_ARGMAX); gcc_assert (!formatters[argno]); formatters[argno] = &args[chunk]; do { obstack_1grow (&buffer->chunk_obstack, *p); p++; } while (strchr ("qwl+#", p[-1])); if (p[-1] == '.') { /* We handle '%.Ns' and '%.*s' or '%M$.*N$s' (where M == N + 1). */ if (ISDIGIT (*p)) { do { obstack_1grow (&buffer->chunk_obstack, *p); p++; } while (ISDIGIT (p[-1])); gcc_assert (p[-1] == 's'); } else { gcc_assert (*p == '*'); obstack_1grow (&buffer->chunk_obstack, '*'); p++; if (ISDIGIT (*p)) { char *end; unsigned int argno2 = strtoul (p, &end, 10) - 1; p = end; gcc_assert (argno2 == argno - 1); gcc_assert (!any_unnumbered); gcc_assert (*p == '$'); p++; formatters[argno2] = formatters[argno]; } else { gcc_assert (!any_numbered); formatters[argno+1] = formatters[argno]; curarg++; } gcc_assert (*p == 's'); obstack_1grow (&buffer->chunk_obstack, 's'); p++; } } if (*p == '\0') break; obstack_1grow (&buffer->chunk_obstack, '\0'); gcc_assert (chunk < PP_NL_ARGMAX * 2); args[chunk++] = XOBFINISH (&buffer->chunk_obstack, const char *); } obstack_1grow (&buffer->chunk_obstack, '\0'); gcc_assert (chunk < PP_NL_ARGMAX * 2); args[chunk++] = XOBFINISH (&buffer->chunk_obstack, const char *); args[chunk] = 0; /* Set output to the argument obstack, and switch line-wrapping and prefixing off. */ buffer->obstack = &buffer->chunk_obstack; old_wrapping_mode = pp_set_verbatim_wrapping (pp); /* Second phase. Replace each formatter with the formatted text it corresponds to. */ for (argno = 0; formatters[argno]; argno++) { int precision = 0; bool wide = false; bool plus = false; bool hash = false; bool quote = false; /* We do not attempt to enforce any ordering on the modifier characters. */ for (p = *formatters[argno];; p++) { switch (*p) { case 'q': gcc_assert (!quote); quote = true; continue; case '+': gcc_assert (!plus); plus = true; continue; case '#': gcc_assert (!hash); hash = true; continue; case 'w': gcc_assert (!wide); wide = true; continue; case 'l': /* We don't support precision beyond that of "long long". */ gcc_assert (precision < 2); precision++; continue; } break; } gcc_assert (!wide || precision == 0); if (quote) pp_string (pp, open_quote); switch (*p) { case 'c': pp_character (pp, va_arg (*text->args_ptr, int)); break; case 'd': case 'i': if (wide) pp_wide_integer (pp, va_arg (*text->args_ptr, HOST_WIDE_INT)); else pp_integer_with_precision (pp, *text->args_ptr, precision, int, "d"); break; case 'o': if (wide) pp_scalar (pp, "%" HOST_WIDE_INT_PRINT "o", va_arg (*text->args_ptr, unsigned HOST_WIDE_INT)); else pp_integer_with_precision (pp, *text->args_ptr, precision, unsigned, "o"); break; case 's': pp_string (pp, va_arg (*text->args_ptr, const char *)); break; case 'p': pp_pointer (pp, va_arg (*text->args_ptr, void *)); break; case 'u': if (wide) pp_scalar (pp, HOST_WIDE_INT_PRINT_UNSIGNED, va_arg (*text->args_ptr, unsigned HOST_WIDE_INT)); else pp_integer_with_precision (pp, *text->args_ptr, precision, unsigned, "u"); break; case 'x': if (wide) pp_scalar (pp, HOST_WIDE_INT_PRINT_HEX, va_arg (*text->args_ptr, unsigned HOST_WIDE_INT)); else pp_integer_with_precision (pp, *text->args_ptr, precision, unsigned, "x"); break; case 'K': { tree t = va_arg (*text->args_ptr, tree), block; gcc_assert (text->locus != NULL); *text->locus = EXPR_LOCATION (t); gcc_assert (text->abstract_origin != NULL); block = TREE_BLOCK (t); *text->abstract_origin = NULL; while (block && TREE_CODE (block) == BLOCK && BLOCK_ABSTRACT_ORIGIN (block)) { tree ao = BLOCK_ABSTRACT_ORIGIN (block); while (TREE_CODE (ao) == BLOCK && BLOCK_ABSTRACT_ORIGIN (ao) && BLOCK_ABSTRACT_ORIGIN (ao) != ao) ao = BLOCK_ABSTRACT_ORIGIN (ao); if (TREE_CODE (ao) == FUNCTION_DECL) { *text->abstract_origin = block; break; } block = BLOCK_SUPERCONTEXT (block); } } break; case '.': { int n; const char *s; /* We handle '%.Ns' and '%.*s' or '%M$.*N$s' (where M == N + 1). The format string should be verified already from the first phase. */ p++; if (ISDIGIT (*p)) { char *end; n = strtoul (p, &end, 10); p = end; gcc_assert (*p == 's'); } else { gcc_assert (*p == '*'); p++; gcc_assert (*p == 's'); n = va_arg (*text->args_ptr, int); /* This consumes a second entry in the formatters array. */ gcc_assert (formatters[argno] == formatters[argno+1]); argno++; } s = va_arg (*text->args_ptr, const char *); pp_append_text (pp, s, s + n); } break; default: { bool ok; gcc_assert (pp_format_decoder (pp)); ok = pp_format_decoder (pp) (pp, text, p, precision, wide, plus, hash); gcc_assert (ok); } } if (quote) pp_string (pp, close_quote); obstack_1grow (&buffer->chunk_obstack, '\0'); *formatters[argno] = XOBFINISH (&buffer->chunk_obstack, const char *); } #ifdef ENABLE_CHECKING for (; argno < PP_NL_ARGMAX; argno++) gcc_assert (!formatters[argno]); #endif /* Revert to normal obstack and wrapping mode. */ buffer->obstack = &buffer->formatted_obstack; buffer->line_length = 0; pp_wrapping_mode (pp) = old_wrapping_mode; pp_clear_state (pp); } /* Format of a message pointed to by TEXT. */ void pp_base_output_formatted_text (pretty_printer *pp) { unsigned int chunk; output_buffer *buffer = pp_buffer (pp); struct chunk_info *chunk_array = buffer->cur_chunk_array; const char **args = chunk_array->args; gcc_assert (buffer->obstack == &buffer->formatted_obstack); gcc_assert (buffer->line_length == 0); /* This is a third phase, first 2 phases done in pp_base_format_args. Now we actually print it. */ for (chunk = 0; args[chunk]; chunk++) pp_string (pp, args[chunk]); /* Deallocate the chunk structure and everything after it (i.e. the associated series of formatted strings). */ buffer->cur_chunk_array = chunk_array->prev; obstack_free (&buffer->chunk_obstack, chunk_array); } /* Helper subroutine of output_verbatim and verbatim. Do the appropriate settings needed by BUFFER for a verbatim formatting. */ void pp_base_format_verbatim (pretty_printer *pp, text_info *text) { /* Set verbatim mode. */ pp_wrapping_mode_t oldmode = pp_set_verbatim_wrapping (pp); /* Do the actual formatting. */ pp_format (pp, text); pp_output_formatted_text (pp); /* Restore previous settings. */ pp_wrapping_mode (pp) = oldmode; } /* Flush the content of BUFFER onto the attached stream. */ void pp_base_flush (pretty_printer *pp) { pp_write_text_to_stream (pp); pp_clear_state (pp); fputc ('\n', pp->buffer->stream); fflush (pp->buffer->stream); pp_needs_newline (pp) = false; } /* Sets the number of maximum characters per line PRETTY-PRINTER can output in line-wrapping mode. A LENGTH value 0 suppresses line-wrapping. */ void pp_base_set_line_maximum_length (pretty_printer *pp, int length) { pp_line_cutoff (pp) = length; pp_set_real_maximum_length (pp); } /* Clear PRETTY-PRINTER output area text info. */ void pp_base_clear_output_area (pretty_printer *pp) { obstack_free (pp->buffer->obstack, obstack_base (pp->buffer->obstack)); pp->buffer->line_length = 0; } /* Set PREFIX for PRETTY-PRINTER. */ void pp_base_set_prefix (pretty_printer *pp, const char *prefix) { pp->prefix = prefix; pp_set_real_maximum_length (pp); pp->emitted_prefix = false; pp_indentation (pp) = 0; } /* Free PRETTY-PRINTER's prefix, a previously malloc()'d string. */ void pp_base_destroy_prefix (pretty_printer *pp) { if (pp->prefix != NULL) { free (CONST_CAST (char *, pp->prefix)); pp->prefix = NULL; } } /* Write out PRETTY-PRINTER's prefix. */ void pp_base_emit_prefix (pretty_printer *pp) { if (pp->prefix != NULL) { switch (pp_prefixing_rule (pp)) { default: case DIAGNOSTICS_SHOW_PREFIX_NEVER: break; case DIAGNOSTICS_SHOW_PREFIX_ONCE: if (pp->emitted_prefix) { pp_base_indent (pp); break; } pp_indentation (pp) += 3; /* Fall through. */ case DIAGNOSTICS_SHOW_PREFIX_EVERY_LINE: { int prefix_length = strlen (pp->prefix); pp_append_r (pp, pp->prefix, prefix_length); pp->emitted_prefix = true; } break; } } } /* Construct a PRETTY-PRINTER with PREFIX and of MAXIMUM_LENGTH characters per line. */ void pp_construct (pretty_printer *pp, const char *prefix, int maximum_length) { memset (pp, 0, sizeof (pretty_printer)); pp->buffer = XCNEW (output_buffer); obstack_init (&pp->buffer->chunk_obstack); obstack_init (&pp->buffer->formatted_obstack); pp->buffer->obstack = &pp->buffer->formatted_obstack; pp->buffer->stream = stderr; pp_line_cutoff (pp) = maximum_length; pp_prefixing_rule (pp) = DIAGNOSTICS_SHOW_PREFIX_ONCE; pp_set_prefix (pp, prefix); pp_translate_identifiers (pp) = true; } /* Append a string delimited by START and END to the output area of PRETTY-PRINTER. No line wrapping is done. However, if beginning a new line then emit PRETTY-PRINTER's prefix and skip any leading whitespace if appropriate. The caller must ensure that it is safe to do so. */ void pp_base_append_text (pretty_printer *pp, const char *start, const char *end) { /* Emit prefix and skip whitespace if we're starting a new line. */ if (pp->buffer->line_length == 0) { pp_emit_prefix (pp); if (pp_is_wrapping_line (pp)) while (start != end && *start == ' ') ++start; } pp_append_r (pp, start, end - start); } /* Finishes constructing a NULL-terminated character string representing the PRETTY-PRINTED text. */ const char * pp_base_formatted_text (pretty_printer *pp) { obstack_1grow (pp->buffer->obstack, '\0'); return pp_formatted_text_data (pp); } /* Return a pointer to the last character emitted in PRETTY-PRINTER's output area. A NULL pointer means no character available. */ const char * pp_base_last_position_in_text (const pretty_printer *pp) { const char *p = NULL; struct obstack *text = pp->buffer->obstack; if (obstack_base (text) != obstack_next_free (text)) p = ((const char *) obstack_next_free (text)) - 1; return p; } /* Return the amount of characters PRETTY-PRINTER can accept to make a full line. Meaningful only in line-wrapping mode. */ int pp_base_remaining_character_count_for_line (pretty_printer *pp) { return pp->maximum_length - pp->buffer->line_length; } /* Format a message into BUFFER a la printf. */ void pp_printf (pretty_printer *pp, const char *msg, ...) { text_info text; va_list ap; va_start (ap, msg); text.err_no = errno; text.args_ptr = ≈ text.format_spec = msg; text.locus = NULL; pp_format (pp, &text); pp_output_formatted_text (pp); va_end (ap); } /* Output MESSAGE verbatim into BUFFER. */ void pp_verbatim (pretty_printer *pp, const char *msg, ...) { text_info text; va_list ap; va_start (ap, msg); text.err_no = errno; text.args_ptr = ≈ text.format_spec = msg; text.locus = NULL; pp_format_verbatim (pp, &text); va_end (ap); } /* Have PRETTY-PRINTER start a new line. */ void pp_base_newline (pretty_printer *pp) { obstack_1grow (pp->buffer->obstack, '\n'); pp->buffer->line_length = 0; } /* Have PRETTY-PRINTER add a CHARACTER. */ void pp_base_character (pretty_printer *pp, int c) { if (pp_is_wrapping_line (pp) && pp_remaining_character_count_for_line (pp) <= 0) { pp_newline (pp); if (ISSPACE (c)) return; } obstack_1grow (pp->buffer->obstack, c); ++pp->buffer->line_length; } /* Append a STRING to the output area of PRETTY-PRINTER; the STRING may be line-wrapped if in appropriate mode. */ void pp_base_string (pretty_printer *pp, const char *str) { pp_maybe_wrap_text (pp, str, str + (str ? strlen (str) : 0)); } /* Maybe print out a whitespace if needed. */ void pp_base_maybe_space (pretty_printer *pp) { if (pp_base (pp)->padding != pp_none) { pp_space (pp); pp_base (pp)->padding = pp_none; } } /* Print the identifier ID to PRETTY-PRINTER. */ void pp_base_tree_identifier (pretty_printer *pp, tree id) { if (pp_translate_identifiers (pp)) { const char *text = identifier_to_locale (IDENTIFIER_POINTER (id)); pp_append_text (pp, text, text + strlen (text)); } else pp_append_text (pp, IDENTIFIER_POINTER (id), IDENTIFIER_POINTER (id) + IDENTIFIER_LENGTH (id)); } /* The string starting at P has LEN (at least 1) bytes left; if they start with a valid UTF-8 sequence, return the length of that sequence and set *VALUE to the value of that sequence, and otherwise return 0 and set *VALUE to (unsigned int) -1. */ static int decode_utf8_char (const unsigned char *p, size_t len, unsigned int *value) { unsigned int t = *p; if (len == 0) abort (); if (t & 0x80) { size_t utf8_len = 0; unsigned int ch; size_t i; for (t = *p; t & 0x80; t <<= 1) utf8_len++; if (utf8_len > len || utf8_len < 2 || utf8_len > 6) { *value = (unsigned int) -1; return 0; } ch = *p & ((1 << (7 - utf8_len)) - 1); for (i = 1; i < utf8_len; i++) { unsigned int u = p[i]; if ((u & 0xC0) != 0x80) { *value = (unsigned int) -1; return 0; } ch = (ch << 6) | (u & 0x3F); } if ( (ch <= 0x7F && utf8_len > 1) || (ch <= 0x7FF && utf8_len > 2) || (ch <= 0xFFFF && utf8_len > 3) || (ch <= 0x1FFFFF && utf8_len > 4) || (ch <= 0x3FFFFFF && utf8_len > 5) || (ch >= 0xD800 && ch <= 0xDFFF)) { *value = (unsigned int) -1; return 0; } *value = ch; return utf8_len; } else { *value = t; return 1; } } /* Given IDENT, an identifier in the internal encoding, return a version of IDENT suitable for diagnostics in the locale character set: either IDENT itself, or a garbage-collected string converted to the locale character set and using escape sequences if not representable in the locale character set or containing control characters or invalid byte sequences. Existing backslashes in IDENT are not doubled, so the result may not uniquely specify the contents of an arbitrary byte sequence identifier. */ const char * identifier_to_locale (const char *ident) { const unsigned char *uid = (const unsigned char *) ident; size_t idlen = strlen (ident); bool valid_printable_utf8 = true; bool all_ascii = true; size_t i; for (i = 0; i < idlen;) { unsigned int c; size_t utf8_len = decode_utf8_char (&uid[i], idlen - i, &c); if (utf8_len == 0 || c <= 0x1F || (c >= 0x7F && c <= 0x9F)) { valid_printable_utf8 = false; break; } if (utf8_len > 1) all_ascii = false; i += utf8_len; } /* If IDENT contains invalid UTF-8 sequences (which may occur with attributes putting arbitrary byte sequences in identifiers), or control characters, we use octal escape sequences for all bytes outside printable ASCII. */ if (!valid_printable_utf8) { char *ret = GGC_NEWVEC (char, 4 * idlen + 1); char *p = ret; for (i = 0; i < idlen; i++) { if (uid[i] > 0x1F && uid[i] < 0x7F) *p++ = uid[i]; else { sprintf (p, "\\%03o", uid[i]); p += 4; } } *p = 0; return ret; } /* Otherwise, if it is valid printable ASCII, or printable UTF-8 with the locale character set being UTF-8, IDENT is used. */ if (all_ascii || locale_utf8) return ident; /* Otherwise IDENT is converted to the locale character set if possible. */ #if defined ENABLE_NLS && defined HAVE_LANGINFO_CODESET && HAVE_ICONV if (locale_encoding != NULL) { iconv_t cd = iconv_open (locale_encoding, "UTF-8"); bool conversion_ok = true; char *ret = NULL; if (cd != (iconv_t) -1) { size_t ret_alloc = 4 * idlen + 1; for (;;) { /* Repeat the whole conversion process as needed with larger buffers so non-reversible transformations can always be detected. */ ICONV_CONST char *inbuf = CONST_CAST (char *, ident); char *outbuf; size_t inbytesleft = idlen; size_t outbytesleft = ret_alloc - 1; size_t iconv_ret; ret = GGC_NEWVEC (char, ret_alloc); outbuf = ret; if (iconv (cd, 0, 0, 0, 0) == (size_t) -1) { conversion_ok = false; break; } iconv_ret = iconv (cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft); if (iconv_ret == (size_t) -1 || inbytesleft != 0) { if (errno == E2BIG) { ret_alloc *= 2; ggc_free (ret); ret = NULL; continue; } else { conversion_ok = false; break; } } else if (iconv_ret != 0) { conversion_ok = false; break; } /* Return to initial shift state. */ if (iconv (cd, 0, 0, &outbuf, &outbytesleft) == (size_t) -1) { if (errno == E2BIG) { ret_alloc *= 2; ggc_free (ret); ret = NULL; continue; } else { conversion_ok = false; break; } } *outbuf = 0; break; } iconv_close (cd); if (conversion_ok) return ret; } } #endif /* Otherwise, convert non-ASCII characters in IDENT to UCNs. */ { char *ret = GGC_NEWVEC (char, 10 * idlen + 1); char *p = ret; for (i = 0; i < idlen;) { unsigned int c; size_t utf8_len = decode_utf8_char (&uid[i], idlen - i, &c); if (utf8_len == 1) *p++ = uid[i]; else { sprintf (p, "\\U%08x", c); p += 10; } i += utf8_len; } *p = 0; return ret; } }
Go to most recent revision | Compare with Previous | Blame | View Log