New file in g77 front end.

From-SVN: r14986

gcc/f/ansify.c

+/* ansify.c
+   Copyright (C) 1997 Free Software Foundation, Inc.
+   Contributed by James Craig Burley (burley@gnu.ai.mit.edu).
+
+This file is part of GNU Fortran.
+
+GNU Fortran 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.
+
+GNU Fortran 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 GNU Fortran; see the file COPYING.  If not, write to
+the Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+02111-1307, USA.  */
+
+/* From f/proj.h, which uses #error -- not all C compilers
+   support that, and we want *this* program to be compilable
+   by pretty much any C compiler.  */
+
+#include "assert.j"		/* Use gcc's assert.h. */
+#include <stdio.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <string.h>
+
+typedef enum
+  {
+#if !defined(false) || !defined(true)
+    false = 0, true = 1,
+#endif
+#if !defined(FALSE) || !defined(TRUE)
+    FALSE = 0, TRUE = 1,
+#endif
+    Doggone_Trailing_Comma_Dont_Work = 1
+  } bool;
+
+#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
+
+#define die_unless(c) \
+  do if (!(c)) \
+    { \
+      fprintf (stderr, "%s:%lu: " #c "\n", argv[1], lineno); \
+      die (); \
+    } \
+  while(0)
+
+static void
+die ()
+{
+  exit (1);
+}
+
+int
+main(int argc, char **argv)
+{
+  int c;
+  static unsigned long lineno = 1;
+
+  die_unless (argc == 2);
+
+  printf ("\
+/* This file is automatically generated from `%s',\n\
+   which you should modify instead.  */\n\
+# 1 \"%s\"\n\
+",
+	  argv[1], argv[1]);
+
+  while ((c = getchar ()) != EOF)
+    {
+      switch (c)
+	{
+	default:
+	  putchar (c);
+	  break;
+
+	case '\n':
+	  ++lineno;
+	  putchar (c);
+	  break;
+
+	case '"':
+	  putchar (c);
+	  for (;;)
+	    {
+	      c = getchar ();
+	      die_unless (c != EOF);
+	      switch (c)
+		{
+		case '"':
+		  putchar (c);
+		  goto next_char;
+
+		case '\n':
+		  putchar ('\\');
+		  putchar ('n');
+		  putchar ('\\');
+		  putchar ('\n');
+		  ++lineno;
+		  break;
+
+		case '\\':
+		  putchar (c);
+		  c = getchar ();
+		  die_unless (c != EOF);
+		  putchar (c);
+		  if (c == '\n')
+		    ++lineno;
+		  break;
+		  
+		default:
+		  putchar (c);
+		  break;
+		}
+	    }
+	  break;
+
+	case '\'':
+	  putchar (c);
+	  for (;;)
+	    {
+	      c = getchar ();
+	      die_unless (c != EOF);
+	      switch (c)
+		{
+		case '\'':
+		  putchar (c);
+		  goto next_char;
+		  
+		case '\n':
+		  putchar ('\\');
+		  putchar ('n');
+		  putchar ('\\');
+		  putchar ('\n');
+		  ++lineno;
+		  break;
+		  
+		case '\\':
+		  putchar (c);
+		  c = getchar ();
+		  die_unless (c != EOF);
+		  putchar (c);
+		  if (c == '\n')
+		    ++lineno;
+		  break;
+		  
+		default:
+		  putchar (c);
+		  break;
+		}
+	    }
+	  break;
+
+	case '/':
+	  putchar (c);
+	  c = getchar ();
+	  putchar (c);
+	  if (c != '*')
+	    break;
+	  for (;;)
+	    {
+	      c = getchar ();
+	      die_unless (c != EOF);
+
+	      switch (c)
+		{
+		case '\n':
+		  ++lineno;
+		  putchar (c);
+		  break;
+		  
+		case '*':
+		  c = getchar ();
+		  die_unless (c != EOF);
+		  if (c == '/')
+		    {
+		      putchar ('*');
+		      putchar ('/');
+		      goto next_char;
+		    }
+		  if (c == '\n')
+		    {
+		      ++lineno;
+		      putchar (c);
+		    }
+		  break;
+		  
+		default:
+		  /* Don't bother outputting content of comments.  */
+		  break;
+		}
+	    }
+	  break;
+	}
+      
+    next_char:
+      ;
+    }
+
+  die_unless (c == EOF);
+
+  return 0;
+}