version.pl: support version numbers of the form X.Y[.Z]rcW

Support version numbers of the form X.Y[.Z]rcW where X, Y, Z and W are
numbers.  For the numeric macros, drop them down to a lower level, so
2.0rc1 is treated as version 1.99.99.91.

diff --git a/version.pl b/version.pl
index d8fdad4..21ba866 100755 (executable)
--- a/version.pl
+++ b/version.pl
@@ -35,18 +35,23 @@ $line = <STDIN>;
 chomp $line;
 
 undef $man, $min, $smin, $plvl, $tail;
+$is_rc = 0;
 
-if ( $line =~ /^([0-9]+)\.([0-9]+)/ ) {
+if ( $line =~ /^([0-9]+)\.([0-9]+)(.*)$/ ) {
     $maj  = $1;
     $min  = $2;
-    $tail = $';
-    if ( $tail =~ /^\.([0-9]+)/ ) {
+    $tail = $3;
+    if ( $tail =~ /^\.([0-9]+)(.*)$/ ) {
        $smin = $1;
-       $tail = $';
+       $tail = $2;
     }
-    if ( $tail =~ /^(pl|\.)([0-9]+)/ ) {
+    if ( $tail =~ /^(pl|\.)([0-9]+)(.*)$/ ) {
        $plvl = $2;
-       $tail = $';
+       $tail = $3;
+    } elsif ( $tail =~ /^rc([0-9]+)(.*)$/ ) {
+       $is_rc = 1;
+       $plvl = $1;
+       $tail = $2;
     }
 } else {
     die "$0: Invalid input format\n";
@@ -55,6 +60,21 @@ if ( $line =~ /^([0-9]+)\.([0-9]+)/ ) {
 $nmaj = $maj+0;   $nmin = $min+0;
 $nsmin = $smin+0; $nplvl = $plvl+0;
 
+if ($is_rc) {
+    $nplvl += 90;
+    if ($nsmin > 0) {
+       $nsmin--;
+    } else {
+       $nsmin = 99;
+       if ($nmin > 0) {
+           $nmin--;
+       } else {
+           $nmin = 99;
+           $nmaj--;
+       }
+    }
+}
+
 $nasm_id = ($nmaj << 24)+($nmin << 16)+($nsmin << 8)+$nplvl;
 
 if ( $what eq 'h' ) {