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Diffstat (limited to 'gcc-4.2.1-5666.3/gcc/pretty-print.c')
| -rw-r--r-- | gcc-4.2.1-5666.3/gcc/pretty-print.c | 817 |
1 files changed, 817 insertions, 0 deletions
diff --git a/gcc-4.2.1-5666.3/gcc/pretty-print.c b/gcc-4.2.1-5666.3/gcc/pretty-print.c new file mode 100644 index 000000000..82df53b01 --- /dev/null +++ b/gcc-4.2.1-5666.3/gcc/pretty-print.c @@ -0,0 +1,817 @@ +/* Various declarations for language-independent pretty-print subroutines. + Copyright (C) 2003, 2004, 2005 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 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, 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301, 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 "intl.h" +#include "pretty-print.h" +#include "tree.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. */ +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. + %H: location_t. + %J: a decl tree, from which DECL_SOURCE_LOCATION 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 'H': + { + location_t *locus = va_arg (*text->args_ptr, location_t *); + gcc_assert (text->locus != NULL); + *text->locus = *locus; + } + break; + + case 'J': + { + tree t = va_arg (*text->args_ptr, tree); + gcc_assert (text->locus != NULL); + *text->locus = DECL_SOURCE_LOCATION (t); + } + 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 ((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); +} + +/* 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; + } +} |