X-Git-Url: https://perl5.git.perl.org/perl5.git/blobdiff_plain/cb7b5e07a2547873dcf5502e7f9f8f589eae0bf0..a2ac9a71fd041588f93167970d1121ded5605f26:/opcode.pl

diff --git a/opcode.pl b/opcode.pl
index ef9ab1e..2cc242f 100755
--- a/opcode.pl
+++ b/opcode.pl
@@ -1,4 +1,19 @@
 #!/usr/bin/perl -w
+# 
+# Regenerate (overwriting only if changed):
+#
+#    opcode.h
+#    opnames.h
+#    pp_proto.h
+#    pp.sym
+#
+# from information stored in the DATA section of this file, plus the
+# values hardcoded into this script in @raw_alias.
+#
+# Accepts the standard regen_lib -q and -v args.
+#
+# This script is normally invoked from regen.pl.
+
 use strict;
 
 BEGIN {
@@ -8,11 +23,9 @@ BEGIN {
 
 my $opcode_new = 'opcode.h-new';
 my $opname_new = 'opnames.h-new';
-open(OC, ">$opcode_new") || die "Can't create $opcode_new: $!\n";
-binmode OC;
-open(ON, ">$opname_new") || die "Can't create $opname_new: $!\n";
-binmode ON;
-select OC;
+my $oc = safer_open($opcode_new);
+my $on = safer_open($opname_new);
+select $oc;
 
 # Read data.
 
@@ -128,13 +141,13 @@ PERL_PPDEF(Perl_unimplemented_op)
 
 END
 
-print ON <<"END";
+print $on <<"END";
 /* -*- buffer-read-only: t -*-
  *
  *    opnames.h
  *
  *    Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
- *    2007 by Larry Wall and others
+ *    2007, 2008 by Larry Wall and others
  *
  *    You may distribute under the terms of either the GNU General Public
  *    License or the Artistic License, as specified in the README file.
@@ -150,14 +163,14 @@ END
 
 my $i = 0;
 for (@ops) {
-    # print ON "\t", &tab(3,"OP_\U$_,"), "/* ", $i++, " */\n";
-      print ON "\t", &tab(3,"OP_\U$_"), " = ", $i++, ",\n";
+    # print $on "\t", &tab(3,"OP_\U$_,"), "/* ", $i++, " */\n";
+      print $on "\t", &tab(3,"OP_\U$_"), " = ", $i++, ",\n";
 }
-print ON "\t", &tab(3,"OP_max"), "\n";
-print ON "} opcode;\n";
-print ON "\n#define MAXO ", scalar @ops, "\n";
-print ON "#define OP_phoney_INPUT_ONLY -1\n";
-print ON "#define OP_phoney_OUTPUT_ONLY -2\n\n";
+print $on "\t", &tab(3,"OP_max"), "\n";
+print $on "} opcode;\n";
+print $on "\n#define MAXO ", scalar @ops, "\n";
+print $on "#define OP_phoney_INPUT_ONLY -1\n";
+print $on "#define OP_phoney_OUTPUT_ONLY -2\n\n";
 
 # Emit op names and descriptions.
 
@@ -395,7 +408,7 @@ END
 
 # Emit OP_IS_* macros
 
-print ON <<EO_OP_IS_COMMENT;
+print $on <<EO_OP_IS_COMMENT;
 
 /* the OP_IS_(SOCKET|FILETEST) macros are optimized to a simple range
     check because all the member OPs are contiguous in opcode.pl
@@ -419,45 +432,40 @@ sub gen_op_is_macro {
 	my $last = pop @rest;	# @rest slurped, get its last
 	die "Invalid range of ops: $first .. $last\n" unless $last;
 
-	print ON "#define $macname(op)	\\\n\t(";
+	print $on "#define $macname(op)	\\\n\t(";
 
 	# verify that op-ct matches 1st..last range (and fencepost)
 	# (we know there are no dups)
 	if ( $op_is->{$last} - $op_is->{$first} == scalar @rest + 1) {
 	    
 	    # contiguous ops -> optimized version
-	    print ON "(op) >= OP_" . uc($first) . " && (op) <= OP_" . uc($last);
-	    print ON ")\n\n";
+	    print $on "(op) >= OP_" . uc($first) . " && (op) <= OP_" . uc($last);
+	    print $on ")\n\n";
 	}
 	else {
-	    print ON join(" || \\\n\t ",
+	    print $on join(" || \\\n\t ",
 			  map { "(op) == OP_" . uc() } sort keys %$op_is);
-	    print ON ")\n\n";
+	    print $on ")\n\n";
 	}
     }
 }
 
-print OC "/* ex: set ro: */\n";
-print ON "/* ex: set ro: */\n";
+print $oc "/* ex: set ro: */\n";
+print $on "/* ex: set ro: */\n";
 
-close OC or die "Error closing opcode.h: $!\n";
-close ON or die "Error closing opnames.h: $!\n";
+safer_close($oc);
+safer_close($on);
 
-foreach ('opcode.h', 'opnames.h') {
-    safer_rename_silent $_, "$_-old";
-}
-safer_rename $opcode_new, 'opcode.h';
-safer_rename $opname_new, 'opnames.h';
+rename_if_different $opcode_new, 'opcode.h';
+rename_if_different $opname_new, 'opnames.h';
 
 my $pp_proto_new = 'pp_proto.h-new';
 my $pp_sym_new  = 'pp.sym-new';
 
-open PP, ">$pp_proto_new" or die "Error creating $pp_proto_new: $!\n";
-binmode PP;
-open PPSYM, ">$pp_sym_new" or die "Error creating $pp_sym_new: $!\n";
-binmode PPSYM;
+my $pp = safer_open($pp_proto_new);
+my $ppsym = safer_open($pp_sym_new);
 
-print PP <<"END";
+print $pp <<"END";
 /* -*- buffer-read-only: t -*-
    !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
    This file is built by opcode.pl from its data.  Any changes made here
@@ -466,7 +474,7 @@ print PP <<"END";
 
 END
 
-print PPSYM <<"END";
+print $ppsym <<"END";
 # -*- buffer-read-only: t -*-
 #
 # !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
@@ -478,30 +486,27 @@ END
 
 
 for (sort keys %ckname) {
-    print PP "PERL_CKDEF(Perl_$_)\n";
-    print PPSYM "Perl_$_\n";
+    print $pp "PERL_CKDEF(Perl_$_)\n";
+    print $ppsym "Perl_$_\n";
 #OP *\t", &tab(3,$_),"(OP* o);\n";
 }
 
-print PP "\n\n";
+print $pp "\n\n";
 
 for (@ops) {
     next if /^i_(pre|post)(inc|dec)$/;
     next if /^custom$/;
-    print PP "PERL_PPDEF(Perl_pp_$_)\n";
-    print PPSYM "Perl_pp_$_\n";
+    print $pp "PERL_PPDEF(Perl_pp_$_)\n";
+    print $ppsym "Perl_pp_$_\n";
 }
-print PP "\n/* ex: set ro: */\n";
-print PPSYM "\n# ex: set ro:\n";
+print $pp "\n/* ex: set ro: */\n";
+print $ppsym "\n# ex: set ro:\n";
 
-close PP or die "Error closing pp_proto.h: $!\n";
-close PPSYM or die "Error closing pp.sym: $!\n";
+safer_close($pp);
+safer_close($ppsym);
 
-foreach ('pp_proto.h', 'pp.sym') {
-    safer_rename_silent $_, "$_-old";
-}
-safer_rename $pp_proto_new, 'pp_proto.h';
-safer_rename $pp_sym_new, 'pp.sym';
+rename_if_different $pp_proto_new, 'pp_proto.h';
+rename_if_different $pp_sym_new, 'pp.sym';
 
 END {
   foreach ('opcode.h', 'opnames.h', 'pp_proto.h', 'pp.sym') {