X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=regcomp.pl;h=7fdbd1303fb46028a27e524ab532ef568a23cace;hb=0b98bec9fd8d0513cb1904db85614d287298f7f8;hp=defbb5f7852ecd06f51b82cdfead402f7d1fb411;hpb=c8e4cf8b7082ad71ba42564a3d098566ed2a16ac;p=p5sagit%2Fp5-mst-13.2.git

diff --git a/regcomp.pl b/regcomp.pl
index defbb5f..7fdbd13 100644
--- a/regcomp.pl
+++ b/regcomp.pl
@@ -1,3 +1,18 @@
+#!/usr/bin/perl
+# 
+# Regenerate (overwriting only if changed):
+#
+#    regnodes.h
+#
+# from information stored in
+#
+#    regcomp.sym
+#    regexp.h
+#
+# Accepts the standard regen_lib -q and -v args.
+#
+# This script is normally invoked from regen.pl.
+
 BEGIN {
     # Get function prototypes
     require 'regen_lib.pl';
@@ -64,15 +79,13 @@ close DESC;
 die "Too many regexp/state opcodes! Maximum is 256, but there are $lastregop in file!"
     if $lastregop>256;
 
-my $tmp_h = 'tmp_reg.h';
+my $tmp_h = 'regnodes.h-new';
 
 unlink $tmp_h if -f $tmp_h;
 
-open OUT, ">$tmp_h";
-#*OUT=\*STDOUT;
-binmode OUT;
+my $out = safer_open($tmp_h);
 
-printf OUT <<EOP,
+printf $out <<EOP,
 /* -*- buffer-read-only: t -*-
    !!!!!!!   DO NOT EDIT THIS FILE   !!!!!!!
    This file is built by regcomp.pl from regcomp.sym.
@@ -92,16 +105,16 @@ EOP
 
 for ($ind=1; $ind <= $lastregop ; $ind++) {
   my $oind = $ind - 1;
-  printf OUT "#define\t%*s\t%d\t/* %#04x %s */\n",
+  printf $out "#define\t%*s\t%d\t/* %#04x %s */\n",
     -$width, $name[$ind], $ind-1, $ind-1, $rest[$ind];
 }
-print OUT "\t/* ------------ States ------------- */\n";
+print $out "\t/* ------------ States ------------- */\n";
 for ( ; $ind <= $tot ; $ind++) {
-  printf OUT "#define\t%*s\t(REGNODE_MAX + %d)\t/* %s */\n",
+  printf $out "#define\t%*s\t(REGNODE_MAX + %d)\t/* %s */\n",
     -$width, $name[$ind], $ind - $lastregop, $rest[$ind];
 }
 
-print OUT <<EOP;
+print $out <<EOP;
 
 /* PL_regkind[] What type of regop or state is this. */
 
@@ -113,13 +126,13 @@ EOP
 
 $ind = 0;
 while (++$ind <= $tot) {
-  printf OUT "\t%*s\t/* %*s */\n",
+  printf $out "\t%*s\t/* %*s */\n",
              -1-$twidth, "$type[$ind],", -$width, $name[$ind];
-  print OUT "\t/* ------------ States ------------- */\n"
+  print $out "\t/* ------------ States ------------- */\n"
     if $ind == $lastregop and $lastregop != $tot;
 }
 
-print OUT <<EOP;
+print $out <<EOP;
 };
 #endif
 
@@ -134,11 +147,11 @@ while (++$ind <= $lastregop) {
   my $size = 0;
   $size = "EXTRA_SIZE(struct regnode_$args[$ind])" if $args[$ind];
   
-  printf OUT "\t%*s\t/* %*s */\n",
+  printf $out "\t%*s\t/* %*s */\n",
 	-37, "$size,",-$rwidth,$name[$ind];
 }
 
-print OUT <<EOP;
+print $out <<EOP;
 };
 
 /* reg_off_by_arg[] - Which argument holds the offset to the next node */
@@ -150,11 +163,11 @@ $ind = 0;
 while (++$ind <= $lastregop) {
   my $size = $longj[$ind] || 0;
 
-  printf OUT "\t%d,\t/* %*s */\n",
+  printf $out "\t%d,\t/* %*s */\n",
 	$size, -$rwidth, $name[$ind]
 }
 
-print OUT <<EOP;
+print $out <<EOP;
 };
 
 #endif /* REG_COMP_C */
@@ -173,17 +186,17 @@ my $sym = "";
 while (++$ind <= $tot) {
   my $size = $longj[$ind] || 0;
 
-  printf OUT "\t%*s\t/* $sym%#04x */\n",
+  printf $out "\t%*s\t/* $sym%#04x */\n",
 	-3-$width,qq("$name[$ind]",), $ind - $ofs;
   if ($ind == $lastregop and $lastregop != $tot) {
-    print OUT "\t/* ------------ States ------------- */\n";
+    print $out "\t/* ------------ States ------------- */\n";
     $ofs = $lastregop;
     $sym = 'REGNODE_MAX +';
   }
     
 }
 
-print OUT <<EOP;
+print $out <<EOP;
 };
 #endif /* DOINIT */
 
@@ -211,20 +224,20 @@ while (<$fh>) {
     }
 }    
 my %vrxf=reverse %rxfv;
-printf OUT "\t/* Bits in extflags defined: %032b */\n",$val;
+printf $out "\t/* Bits in extflags defined: %032b */\n",$val;
 for (0..31) {
     my $n=$vrxf{2**$_}||"UNUSED_BIT_$_";
     $n=~s/^RXf_(PMf_)?//;
-    printf OUT qq(\t%-20s/* 0x%08x */\n), 
+    printf $out qq(\t%-20s/* 0x%08x */\n), 
         qq("$n",),2**$_;
 }  
  
-print OUT <<EOP;
+print $out <<EOP;
 };
 #endif /* DOINIT */
 
 /* ex: set ro: */
 EOP
-close OUT or die "close $tmp_h: $!";
+safer_close($out);
 
-safer_rename $tmp_h, 'regnodes.h';
+rename_if_different $tmp_h, 'regnodes.h';