--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gcc/c-ppoutput.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,586 @@
+/* Preprocess only, using cpplib.
+   Copyright (C) 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2007,
+   2008 Free Software Foundation, Inc.
+   Written by Per Bothner, 1994-95.
+
+   This program 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.
+
+   This program 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 this program; see the file COPYING3.  If not see
+   <http://www.gnu.org/licenses/>.  */
+
+#include "config.h"
+#include "system.h"
+#include "coretypes.h"
+#include "tm.h"
+#include "cpplib.h"
+#include "../libcpp/internal.h"
+#include "tree.h"
+#include "c-common.h"		/* For flags.  */
+#include "c-pragma.h"		/* For parse_in.  */
+
+/* Encapsulates state used to convert a stream of tokens into a text
+   file.  */
+static struct
+{
+  FILE *outf;			/* Stream to write to.  */
+  const cpp_token *prev;	/* Previous token.  */
+  const cpp_token *source;	/* Source token for spacing.  */
+  int src_line;			/* Line number currently being written.  */
+  unsigned char printed;	/* Nonzero if something output at line.  */
+  bool first_time;		/* pp_file_change hasn't been called yet.  */
+} print;
+
+/* Defined and undefined macros being queued for output with -dU at
+   the next newline.  */
+typedef struct macro_queue
+{
+  struct macro_queue *next;	/* Next macro in the list.  */
+  char *macro;			/* The name of the macro if not
+				   defined, the full definition if
+				   defined.  */
+} macro_queue;
+static macro_queue *define_queue, *undef_queue;
+
+/* General output routines.  */
+static void scan_translation_unit (cpp_reader *);
+static void print_lines_directives_only (int, const void *, size_t);
+static void scan_translation_unit_directives_only (cpp_reader *);
+static void scan_translation_unit_trad (cpp_reader *);
+static void account_for_newlines (const unsigned char *, size_t);
+static int dump_macro (cpp_reader *, cpp_hashnode *, void *);
+static void dump_queued_macros (cpp_reader *);
+
+static void print_line (source_location, const char *);
+static void maybe_print_line (source_location);
+
+/* Callback routines for the parser.   Most of these are active only
+   in specific modes.  */
+static void cb_line_change (cpp_reader *, const cpp_token *, int);
+static void cb_define (cpp_reader *, source_location, cpp_hashnode *);
+static void cb_undef (cpp_reader *, source_location, cpp_hashnode *);
+static void cb_used_define (cpp_reader *, source_location, cpp_hashnode *);
+static void cb_used_undef (cpp_reader *, source_location, cpp_hashnode *);
+static void cb_include (cpp_reader *, source_location, const unsigned char *,
+			const char *, int, const cpp_token **);
+static void cb_ident (cpp_reader *, source_location, const cpp_string *);
+static void cb_def_pragma (cpp_reader *, source_location);
+static void cb_read_pch (cpp_reader *pfile, const char *name,
+			 int fd, const char *orig_name);
+
+/* Preprocess and output.  */
+void
+preprocess_file (cpp_reader *pfile)
+{
+  /* A successful cpp_read_main_file guarantees that we can call
+     cpp_scan_nooutput or cpp_get_token next.  */
+  if (flag_no_output)
+    {
+      /* Scan -included buffers, then the main file.  */
+      while (pfile->buffer->prev)
+	cpp_scan_nooutput (pfile);
+      cpp_scan_nooutput (pfile);
+    }
+  else if (cpp_get_options (pfile)->traditional)
+    scan_translation_unit_trad (pfile);
+  else if (cpp_get_options (pfile)->directives_only
+	   && !cpp_get_options (pfile)->preprocessed)
+    scan_translation_unit_directives_only (pfile);
+  else
+    scan_translation_unit (pfile);
+
+  /* -dM command line option.  Should this be elsewhere?  */
+  if (flag_dump_macros == 'M')
+    cpp_forall_identifiers (pfile, dump_macro, NULL);
+
+  /* Flush any pending output.  */
+  if (print.printed)
+    putc ('\n', print.outf);
+}
+
+/* Set up the callbacks as appropriate.  */
+void
+init_pp_output (FILE *out_stream)
+{
+  cpp_callbacks *cb = cpp_get_callbacks (parse_in);
+
+  if (!flag_no_output)
+    {
+      cb->line_change = cb_line_change;
+      /* Don't emit #pragma or #ident directives if we are processing
+	 assembly language; the assembler may choke on them.  */
+      if (cpp_get_options (parse_in)->lang != CLK_ASM)
+	{
+	  cb->ident      = cb_ident;
+	  cb->def_pragma = cb_def_pragma;
+	}
+    }
+
+  if (flag_dump_includes)
+    cb->include  = cb_include;
+
+  if (flag_pch_preprocess)
+    {
+      cb->valid_pch = c_common_valid_pch;
+      cb->read_pch = cb_read_pch;
+    }
+
+  if (flag_dump_macros == 'N' || flag_dump_macros == 'D')
+    {
+      cb->define = cb_define;
+      cb->undef  = cb_undef;
+    }
+
+  if (flag_dump_macros == 'U')
+    {
+      cb->before_define = dump_queued_macros;
+      cb->used_define = cb_used_define;
+      cb->used_undef = cb_used_undef;
+    }
+
+  /* Initialize the print structure.  */
+  print.src_line = 1;
+  print.printed = 0;
+  print.prev = 0;
+  print.outf = out_stream;
+  print.first_time = 1;
+}
+
+/* Writes out the preprocessed file, handling spacing and paste
+   avoidance issues.  */
+static void
+scan_translation_unit (cpp_reader *pfile)
+{
+  bool avoid_paste = false;
+
+  print.source = NULL;
+  for (;;)
+    {
+      const cpp_token *token = cpp_get_token (pfile);
+
+      if (token->type == CPP_PADDING)
+	{
+	  avoid_paste = true;
+	  if (print.source == NULL
+	      || (!(print.source->flags & PREV_WHITE)
+		  && token->val.source == NULL))
+	    print.source = token->val.source;
+	  continue;
+	}
+
+      if (token->type == CPP_EOF)
+	break;
+
+      /* Subtle logic to output a space if and only if necessary.  */
+      if (avoid_paste)
+	{
+	  if (print.source == NULL)
+	    print.source = token;
+	  if (print.source->flags & PREV_WHITE
+	      || (print.prev
+		  && cpp_avoid_paste (pfile, print.prev, token))
+	      || (print.prev == NULL && token->type == CPP_HASH))
+	    putc (' ', print.outf);
+	}
+      else if (token->flags & PREV_WHITE)
+	putc (' ', print.outf);
+
+      avoid_paste = false;
+      print.source = NULL;
+      print.prev = token;
+      if (token->type == CPP_PRAGMA)
+	{
+	  const char *space;
+	  const char *name;
+
+	  maybe_print_line (token->src_loc);
+	  fputs ("#pragma ", print.outf);
+	  c_pp_lookup_pragma (token->val.pragma, &space, &name);
+	  if (space)
+	    fprintf (print.outf, "%s %s", space, name);
+	  else
+	    fprintf (print.outf, "%s", name);
+	  print.printed = 1;
+	}
+      else if (token->type == CPP_PRAGMA_EOL)
+	maybe_print_line (token->src_loc);
+      else
+	cpp_output_token (token, print.outf);
+
+      if (token->type == CPP_COMMENT)
+	account_for_newlines (token->val.str.text, token->val.str.len);
+    }
+}
+
+static void
+print_lines_directives_only (int lines, const void *buf, size_t size)
+{
+  print.src_line += lines;
+  fwrite (buf, 1, size, print.outf);
+}
+
+/* Writes out the preprocessed file, handling spacing and paste
+   avoidance issues.  */
+static void
+scan_translation_unit_directives_only (cpp_reader *pfile)
+{
+  struct _cpp_dir_only_callbacks cb;
+
+  cb.print_lines = print_lines_directives_only;
+  cb.maybe_print_line = maybe_print_line;
+
+  _cpp_preprocess_dir_only (pfile, &cb);
+}
+
+/* Adjust print.src_line for newlines embedded in output.  */
+static void
+account_for_newlines (const unsigned char *str, size_t len)
+{
+  while (len--)
+    if (*str++ == '\n')
+      print.src_line++;
+}
+
+/* Writes out a traditionally preprocessed file.  */
+static void
+scan_translation_unit_trad (cpp_reader *pfile)
+{
+  while (_cpp_read_logical_line_trad (pfile))
+    {
+      size_t len = pfile->out.cur - pfile->out.base;
+      maybe_print_line (pfile->out.first_line);
+      fwrite (pfile->out.base, 1, len, print.outf);
+      print.printed = 1;
+      if (!CPP_OPTION (pfile, discard_comments))
+	account_for_newlines (pfile->out.base, len);
+    }
+}
+
+/* If the token read on logical line LINE needs to be output on a
+   different line to the current one, output the required newlines or
+   a line marker, and return 1.  Otherwise return 0.  */
+static void
+maybe_print_line (source_location src_loc)
+{
+  const struct line_map *map = linemap_lookup (line_table, src_loc);
+  int src_line = SOURCE_LINE (map, src_loc);
+  /* End the previous line of text.  */
+  if (print.printed)
+    {
+      putc ('\n', print.outf);
+      print.src_line++;
+      print.printed = 0;
+    }
+
+  if (src_line >= print.src_line && src_line < print.src_line + 8)
+    {
+      while (src_line > print.src_line)
+	{
+	  putc ('\n', print.outf);
+	  print.src_line++;
+	}
+    }
+  else
+    print_line (src_loc, "");
+}
+
+/* Output a line marker for logical line LINE.  Special flags are "1"
+   or "2" indicating entering or leaving a file.  */
+static void
+print_line (source_location src_loc, const char *special_flags)
+{
+  /* End any previous line of text.  */
+  if (print.printed)
+    putc ('\n', print.outf);
+  print.printed = 0;
+
+  if (!flag_no_line_commands)
+    {
+      const struct line_map *map = linemap_lookup (line_table, src_loc);
+
+      size_t to_file_len = strlen (map->to_file);
+      unsigned char *to_file_quoted =
+         (unsigned char *) alloca (to_file_len * 4 + 1);
+      unsigned char *p;
+
+      print.src_line = SOURCE_LINE (map, src_loc);
+
+      /* cpp_quote_string does not nul-terminate, so we have to do it
+	 ourselves.  */
+      p = cpp_quote_string (to_file_quoted,
+			    (const unsigned char *) map->to_file, to_file_len);
+      *p = '\0';
+      fprintf (print.outf, "# %u \"%s\"%s",
+	       print.src_line == 0 ? 1 : print.src_line,
+	       to_file_quoted, special_flags);
+
+      if (map->sysp == 2)
+	fputs (" 3 4", print.outf);
+      else if (map->sysp == 1)
+	fputs (" 3", print.outf);
+
+      putc ('\n', print.outf);
+    }
+}
+
+/* Called when a line of output is started.  TOKEN is the first token
+   of the line, and at end of file will be CPP_EOF.  */
+static void
+cb_line_change (cpp_reader *pfile, const cpp_token *token,
+		int parsing_args)
+{
+  source_location src_loc = token->src_loc;
+
+  if (define_queue || undef_queue)
+    dump_queued_macros (pfile);
+
+  if (token->type == CPP_EOF || parsing_args)
+    return;
+
+  maybe_print_line (src_loc);
+  print.prev = 0;
+  print.source = 0;
+
+  /* Supply enough spaces to put this token in its original column,
+     one space per column greater than 2, since scan_translation_unit
+     will provide a space if PREV_WHITE.  Don't bother trying to
+     reconstruct tabs; we can't get it right in general, and nothing
+     ought to care.  Some things do care; the fault lies with them.  */
+  if (!CPP_OPTION (pfile, traditional))
+    {
+      const struct line_map *map = linemap_lookup (line_table, src_loc);
+      int spaces = SOURCE_COLUMN (map, src_loc) - 2;
+      print.printed = 1;
+
+      while (-- spaces >= 0)
+	putc (' ', print.outf);
+    }
+}
+
+static void
+cb_ident (cpp_reader *pfile ATTRIBUTE_UNUSED, source_location line,
+	  const cpp_string *str)
+{
+  maybe_print_line (line);
+  fprintf (print.outf, "#ident %s\n", str->text);
+  print.src_line++;
+}
+
+static void
+cb_define (cpp_reader *pfile, source_location line, cpp_hashnode *node)
+{
+  maybe_print_line (line);
+  fputs ("#define ", print.outf);
+
+  /* 'D' is whole definition; 'N' is name only.  */
+  if (flag_dump_macros == 'D')
+    fputs ((const char *) cpp_macro_definition (pfile, node),
+	   print.outf);
+  else
+    fputs ((const char *) NODE_NAME (node), print.outf);
+
+  putc ('\n', print.outf);
+  if (linemap_lookup (line_table, line)->to_line != 0)
+    print.src_line++;
+}
+
+static void
+cb_undef (cpp_reader *pfile ATTRIBUTE_UNUSED, source_location line,
+	  cpp_hashnode *node)
+{
+  maybe_print_line (line);
+  fprintf (print.outf, "#undef %s\n", NODE_NAME (node));
+  print.src_line++;
+}
+
+static void
+cb_used_define (cpp_reader *pfile, source_location line ATTRIBUTE_UNUSED,
+		cpp_hashnode *node)
+{
+  macro_queue *q;
+  if (node->flags & NODE_BUILTIN)
+    return;
+  q = XNEW (macro_queue);
+  q->macro = xstrdup ((const char *) cpp_macro_definition (pfile, node));
+  q->next = define_queue;
+  define_queue = q;
+}
+
+static void
+cb_used_undef (cpp_reader *pfile ATTRIBUTE_UNUSED,
+	       source_location line ATTRIBUTE_UNUSED,
+	       cpp_hashnode *node)
+{
+  macro_queue *q;
+  q = XNEW (macro_queue);
+  q->macro = xstrdup ((const char *) NODE_NAME (node));
+  q->next = undef_queue;
+  undef_queue = q;
+}
+
+static void
+dump_queued_macros (cpp_reader *pfile ATTRIBUTE_UNUSED)
+{
+  macro_queue *q;
+
+  /* End the previous line of text.  */
+  if (print.printed)
+    {
+      putc ('\n', print.outf);
+      print.src_line++;
+      print.printed = 0;
+    }
+
+  for (q = define_queue; q;)
+    {
+      macro_queue *oq;
+      fputs ("#define ", print.outf);
+      fputs (q->macro, print.outf);
+      putc ('\n', print.outf);
+      print.src_line++;
+      oq = q;
+      q = q->next;
+      free (oq->macro);
+      free (oq);
+    }
+  define_queue = NULL;
+  for (q = undef_queue; q;)
+    {
+      macro_queue *oq;
+      fprintf (print.outf, "#undef %s\n", q->macro);
+      print.src_line++;
+      oq = q;
+      q = q->next;
+      free (oq->macro);
+      free (oq);
+    }
+  undef_queue = NULL;
+}
+
+static void
+cb_include (cpp_reader *pfile ATTRIBUTE_UNUSED, source_location line,
+	    const unsigned char *dir, const char *header, int angle_brackets,
+	    const cpp_token **comments)
+{
+  maybe_print_line (line);
+  if (angle_brackets)
+    fprintf (print.outf, "#%s <%s>", dir, header);
+  else
+    fprintf (print.outf, "#%s \"%s\"", dir, header);
+
+  if (comments != NULL)
+    {
+      while (*comments != NULL)
+	{
+	  if ((*comments)->flags & PREV_WHITE)
+	    putc (' ', print.outf);
+	  cpp_output_token (*comments, print.outf);
+	  ++comments;
+	}
+    }
+
+  putc ('\n', print.outf);
+  print.src_line++;
+}
+
+/* Callback called when -fworking-director and -E to emit working
+   directory in cpp output file.  */
+
+void
+pp_dir_change (cpp_reader *pfile ATTRIBUTE_UNUSED, const char *dir)
+{
+  size_t to_file_len = strlen (dir);
+  unsigned char *to_file_quoted =
+     (unsigned char *) alloca (to_file_len * 4 + 1);
+  unsigned char *p;
+
+  /* cpp_quote_string does not nul-terminate, so we have to do it ourselves.  */
+  p = cpp_quote_string (to_file_quoted, (const unsigned char *) dir, to_file_len);
+  *p = '\0';
+  fprintf (print.outf, "# 1 \"%s//\"\n", to_file_quoted);
+}
+
+/* The file name, line number or system header flags have changed, as
+   described in MAP.  */
+
+void
+pp_file_change (const struct line_map *map)
+{
+  const char *flags = "";
+
+  if (flag_no_line_commands)
+    return;
+
+  if (map != NULL)
+    {
+      if (print.first_time)
+	{
+	  /* Avoid printing foo.i when the main file is foo.c.  */
+	  if (!cpp_get_options (parse_in)->preprocessed)
+	    print_line (map->start_location, flags);
+	  print.first_time = 0;
+	}
+      else
+	{
+	  /* Bring current file to correct line when entering a new file.  */
+	  if (map->reason == LC_ENTER)
+	    {
+	      const struct line_map *from = INCLUDED_FROM (line_table, map);
+	      maybe_print_line (LAST_SOURCE_LINE_LOCATION (from));
+	    }
+	  if (map->reason == LC_ENTER)
+	    flags = " 1";
+	  else if (map->reason == LC_LEAVE)
+	    flags = " 2";
+	  print_line (map->start_location, flags);
+	}
+    }
+}
+
+/* Copy a #pragma directive to the preprocessed output.  */
+static void
+cb_def_pragma (cpp_reader *pfile, source_location line)
+{
+  maybe_print_line (line);
+  fputs ("#pragma ", print.outf);
+  cpp_output_line (pfile, print.outf);
+  print.src_line++;
+}
+
+/* Dump out the hash table.  */
+static int
+dump_macro (cpp_reader *pfile, cpp_hashnode *node, void *v ATTRIBUTE_UNUSED)
+{
+  if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN))
+    {
+      fputs ("#define ", print.outf);
+      fputs ((const char *) cpp_macro_definition (pfile, node),
+	     print.outf);
+      putc ('\n', print.outf);
+      print.src_line++;
+    }
+
+  return 1;
+}
+
+/* Load in the PCH file NAME, open on FD.  It was originally searched for
+   by ORIG_NAME.  Also, print out a #include command so that the PCH
+   file can be loaded when the preprocessed output is compiled.  */
+
+static void
+cb_read_pch (cpp_reader *pfile, const char *name,
+	     int fd, const char *orig_name ATTRIBUTE_UNUSED)
+{
+  c_common_read_pch (pfile, name, fd, orig_name);
+
+  fprintf (print.outf, "#pragma GCC pch_preprocess \"%s\"\n", name);
+  print.src_line++;
+}