gensupport.c (init_md_reader_args_cb): Renamed from init_md_reader_args.

	* gensupport.c (init_md_reader_args_cb): Renamed from
	init_md_reader_args.  Add third option, callback function for
	parsing program-specific options.  Add diagnosis of incorrect
	number of input files.
	(init_md_reader): Fold into init_md_reader_args_cb.
	(init_md_reader_args): Now a thin wrapper around
	init_md_reader_args_cb.
	* gensupport.h: Update prototypes.

	* genattr.c, genattrtab.c, gencodes.c, genconfig.c, genemit.c
	* genextract.c, genflags.c, genopinit.c, genoutput.c, genpeep.c
	* genrecog.c: No need to diagnose lack of an input file;
	init_md_reader_args will handle it.
	* genconditions.c: Likewise, and use init_md_reader_args.
	* genconstants.c: Likewise, and no need to call read_md_rtx.

From-SVN: r85511

gcc/ChangeLog

+2004-08-03  Zack Weinberg  <zack@codesourcery.com>
+
+	* gensupport.c (init_md_reader_args_cb): Renamed from
+	init_md_reader_args.  Add third option, callback function for
+	parsing program-specific options.  Add diagnosis of incorrect
+	number of input files.
+	(init_md_reader): Fold into init_md_reader_args_cb.
+	(init_md_reader_args): Now a thin wrapper around
+	init_md_reader_args_cb.
+	* gensupport.h: Update prototypes.
+
+	* genattr.c, genattrtab.c, gencodes.c, genconfig.c, genemit.c
+	* genextract.c, genflags.c, genopinit.c, genoutput.c, genpeep.c
+	* genrecog.c: No need to diagnose lack of an input file;
+	init_md_reader_args will handle it.
+	* genconditions.c: Likewise, and use init_md_reader_args.
+	* genconstants.c: Likewise, and no need to call read_md_rtx.
+
 2004-08-03  Joseph S. Myers  <jsm@polyomino.org.uk>
 
 	* c-decl.c (implicitly_declare): Diagnose incompatible implicit

gcc/genattr.c

@@ -97,9 +97,6 @@ main (int argc, char **argv)
 
   progname = "genattr";
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/genattrtab.c

@@ -4407,9 +4407,6 @@ main (int argc, char **argv)
 
   progname = "genattrtab";
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/gencodes.c

@@ -59,9 +59,6 @@ main (int argc, char **argv)
      direct references to CODE_FOR_xxx in C code.  */
   insn_elision = 0;
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/genconditions.c

@@ -188,10 +188,7 @@ main (int argc, char **argv)
 
   progname = "genconditions";
 
-  if (argc <= 1)
-    fatal ("No input file name.");
-
-  if (init_md_reader (argv[1]) != SUCCESS_EXIT_CODE)
+  if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 
   condition_table = htab_create (1000, hash_c_test, cmp_c_test, NULL);

gcc/genconfig.c

@@ -264,9 +264,6 @@ main (int argc, char **argv)
 
   progname = "genconfig";
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/genconstants.c

@@ -34,8 +34,6 @@ Boston, MA 02111-1307, USA.  */
 #include "errors.h"
 #include "gensupport.h"
 
-static int print_md_constant (void **, void *);
-
 /* Called via traverse_md_constants; emit a #define for
    the current constant definition.  */
 
@@ -52,22 +50,13 @@ print_md_constant (void **slot, void *info)
 int
 main (int argc, char **argv)
 {
-  int dummy1, dummy2;
-  rtx desc;
-
   progname = "genconstants";
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
-  if (init_md_reader (argv[1]) != SUCCESS_EXIT_CODE)
+  if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 
-  /* Scan and discard the entire file.  This has the side effect
-     of loading up the constants table that we wish to scan.  */
-  do
-    desc = read_md_rtx (&dummy1, &dummy2);
-  while (desc);
+  /* Initializing the MD reader has the side effect of loading up
+     the constants table that we wish to scan.  */
 
   puts ("/* Generated automatically by the program `genconstants'");
   puts ("   from the machine description file `md'.  */\n");
@@ -83,4 +72,3 @@ main (int argc, char **argv)
 
   return SUCCESS_EXIT_CODE;
 }
-

gcc/genemit.c

@@ -799,9 +799,6 @@ main (int argc, char **argv)
 
   progname = "genemit";
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/genextract.c

@@ -354,9 +354,6 @@ main (int argc, char **argv)
 
   progname = "genextract";
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/genflags.c

@@ -245,9 +245,6 @@ main (int argc, char **argv)
      direct calls to their generators in C code.  */
   insn_elision = 0;
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/genopinit.c

@@ -352,9 +352,6 @@ main (int argc, char **argv)
 
   progname = "genopinit";
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/genoutput.c

@@ -982,9 +982,6 @@ main (int argc, char **argv)
 
   progname = "genoutput";
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/genpeep.c

@@ -359,9 +359,6 @@ main (int argc, char **argv)
 
   progname = "genpeep";
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/genrecog.c

@@ -2636,9 +2636,6 @@ main (int argc, char **argv)
   memset (&split_tree, 0, sizeof split_tree);
   memset (&peephole2_tree, 0, sizeof peephole2_tree);
 
-  if (argc <= 1)
-    fatal ("no input file name");
-
   if (init_md_reader_args (argc, argv) != SUCCESS_EXIT_CODE)
     return (FATAL_EXIT_CODE);
 

gcc/gensupport.c

@@ -898,9 +898,12 @@ save_string (const char *s, int len)
 /* The entry point for initializing the reader.  */
 
 int
-init_md_reader_args (int argc, char **argv)
+init_md_reader_args_cb (int argc, char **argv, bool (*parse_opt)(const char *))
 {
+  FILE *input_file;
   int i;
+  size_t ix;
+  char *lastsl;
   const char *in_fname;
 
   max_include_len = 0;
@@ -909,7 +912,9 @@ init_md_reader_args (int argc, char **argv)
     {
       if (argv[i][0] != '-')
 	{
-	  if (in_fname == NULL)
+	  if (in_fname)
+	    fatal ("too many input files");
+
 	  in_fname = argv[i];
 	}
       else
@@ -939,33 +944,28 @@ init_md_reader_args (int argc, char **argv)
 	      }
 	      break;
 	    default:
-	      fatal ("invalid option `%s'", argv[i]);
+	      /* The program may have provided a callback so it can
+		 accept its own options.  */
+	      if (parse_opt && parse_opt (argv[i]))
+		break;
 
+	      fatal ("invalid option `%s'", argv[i]);
 	    }
 	}
     }
-    return init_md_reader (in_fname);
-}
 
-/* The entry point for initializing the reader.  */
-
-int
-init_md_reader (const char *filename)
-{
-  FILE *input_file;
-  int c;
-  size_t i;
-  char *lastsl;
+  if (!in_fname)
+    fatal ("no input file name");
 
-  lastsl = strrchr (filename, '/');
+  lastsl = strrchr (in_fname, '/');
   if (lastsl != NULL)
-    base_dir = save_string (filename, lastsl - filename + 1 );
+    base_dir = save_string (in_fname, lastsl - in_fname + 1 );
 
-  read_rtx_filename = filename;
-  input_file = fopen (filename, "r");
+  read_rtx_filename = in_fname;
+  input_file = fopen (in_fname, "r");
   if (input_file == 0)
     {
-      perror (filename);
+      perror (in_fname);
       return FATAL_EXIT_CODE;
     }
 
@@ -973,9 +973,9 @@ init_md_reader (const char *filename)
   condition_table = htab_create (n_insn_conditions,
 				 hash_c_test, cmp_c_test, NULL);
 
-  for (i = 0; i < n_insn_conditions; i++)
-    *(htab_find_slot (condition_table, &insn_conditions[i], INSERT))
-      = (void *) &insn_conditions[i];
+  for (ix = 0; ix < n_insn_conditions; ix++)
+    *(htab_find_slot (condition_table, &insn_conditions[ix], INSERT))
+      = (void *) &insn_conditions[ix];
 
   obstack_init (rtl_obstack);
   errors = 0;
@@ -986,8 +986,7 @@ init_md_reader (const char *filename)
     {
       rtx desc;
       int lineno;
-
-      c = read_skip_spaces (input_file);
+      int c = read_skip_spaces (input_file);
       if (c == EOF)
         break;
 
@@ -1005,6 +1004,14 @@ init_md_reader (const char *filename)
   return errors ? FATAL_EXIT_CODE : SUCCESS_EXIT_CODE;
 }
 
+/* Programs that don't have their own options can use this entry point
+   instead.  */
+int
+init_md_reader_args (int argc, char **argv)
+{
+  return init_md_reader_args_cb (argc, argv, 0);
+}
+
 /* The entry point for reading a single rtx from an md file.  */
 
 rtx

gcc/gensupport.h

@@ -24,8 +24,8 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA
 struct obstack;
 extern struct obstack *rtl_obstack;
 
+extern int init_md_reader_args_cb (int, char **, bool (*)(const char *));
 extern int init_md_reader_args (int, char **);
-extern int init_md_reader (const char *);
 extern rtx read_md_rtx (int *, int *);
 
 extern void message_with_line (int, const char *, ...)