/* Various declarations for language-independent pretty-print subroutines. Copyright (C) 2003 Free Software Foundation, Inc. Contributed by Gabriel Dos Reis 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 2, 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 COPYING. If not, write to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #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 "pretty-print.h" #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, "%ll" 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. */ static inline 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); } /* Format a message pointed to by TEXT. 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. %%: `%'. %*.s: a substring the length of which is specified by an integer. %H: location_t. */ void pp_base_format_text (pretty_printer *pp, text_info *text) { for (; *text->format_spec; ++text->format_spec) { int precision = 0; bool wide = false; /* Ignore text. */ { const char *p = text->format_spec; while (*p && *p != '%') ++p; pp_wrap_text (pp, text->format_spec, p); text->format_spec = p; } if (*text->format_spec == '\0') break; /* We got a '%'. Parse precision modifiers, if any. */ switch (*++text->format_spec) { case 'w': wide = true; ++text->format_spec; break; case 'l': do ++precision; while (*++text->format_spec == 'l'); break; default: break; } /* We don't support precision beyond that of "long long". */ if (precision > 2) abort(); switch (*text->format_spec) { 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, "u"); 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 'm': pp_string (pp, xstrerror (text->err_no)); break; case '%': pp_character (pp, '%'); break; case 'H': { const location_t *locus = va_arg (*text->args_ptr, location_t *); pp_string (pp, "file '"); pp_string (pp, locus->file); pp_string (pp, "', line "); pp_decimal_int (pp, locus->line); } break; case '.': { int n; const char *s; /* We handle no precision specifier but `%.*s'. */ if (*++text->format_spec != '*') abort (); else if (*++text->format_spec != 's') abort (); n = va_arg (*text->args_ptr, int); s = va_arg (*text->args_ptr, const char *); pp_append_text (pp, s, s + n); } break; default: if (!pp_format_decoder (pp) || !(*pp_format_decoder (pp)) (pp, text)) { /* Hmmm. The client failed to install a format translator but called us with an unrecognized format. Or, maybe, the translated string just contains an invalid format, or has formats in the wrong order. Sorry. */ abort (); } } } } /* 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) { diagnostic_prefixing_rule_t rule = pp_prefixing_rule (pp); int line_cutoff = pp_line_cutoff (pp); /* Set verbatim mode. */ pp->prefixing_rule = DIAGNOSTICS_SHOW_PREFIX_NEVER; pp_line_cutoff (pp) = 0; /* Do the actual formatting. */ pp_format_text (pp, text); /* Restore previous settings. */ pp_prefixing_rule (pp) = rule; pp_line_cutoff (pp) = line_cutoff; } /* 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 ((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 = xcalloc (1, sizeof (output_buffer)); obstack_init (&pp->buffer->obstack); pp->buffer->stream = stderr; pp_line_cutoff (pp) = maximum_length; pp_prefixing_rule (pp) = DIAGNOSTICS_SHOW_PREFIX_ONCE; pp_set_prefix (pp, prefix); } /* 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; pp_format_text (pp, &text); 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; 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)); }