Re: regression in $(([##16]...))?

[Peter Stephenson <pws@csr.com>]

On Thu, 16 Oct 2008 10:23:08 +0100
Stephane Chazelas <Stephane_Chazelas@yahoo.fr> wrote:
> ~$ echo $(([##16]12))
> zsh: invalid base (must be 2 to 36 inclusive): -16
> (1)~$ echo $(([##2]12))
> zsh: invalid base (must be 2 to 36 inclusive): -2
> 
> (4.3.6-dev-0+1004)
> 
> I remember a check for the allowed bases was introduced at some
> point, that may be what broke it.

That feature's so obscure I didn't know it was there and it's never been
tested.

Index: Src/math.c
===================================================================
RCS file: /cvsroot/zsh/zsh/Src/math.c,v
retrieving revision 1.35
diff -u -r1.35 math.c
--- Src/math.c	26 Sep 2008 09:11:30 -0000	1.35
+++ Src/math.c	16 Oct 2008 09:30:04 -0000
@@ -670,7 +670,8 @@
 		}
 		if(*ptr != ']')
 			goto bofs;
-		if (outputradix < 2 || outputradix > 36) {
+		n = (outputradix < 0) ? -outputradix : outputradix;
+		if (n < 2 || n > 36) {
 		    zerr("invalid base (must be 2 to 36 inclusive): %d",
 			 outputradix);
 		    return EOI;
Index: Test/C01arith.ztst
===================================================================
RCS file: /cvsroot/zsh/zsh/Test/C01arith.ztst,v
retrieving revision 1.16
diff -u -r1.16 C01arith.ztst
--- Test/C01arith.ztst	12 Jun 2008 13:45:06 -0000	1.16
+++ Test/C01arith.ztst	16 Oct 2008 09:30:04 -0000
@@ -172,3 +172,19 @@
   print $(( 3 + "OK"); echo "Worked")
 0:not a parse failure because not arithmetic
 >+ OK Worked
+
+  fn() {
+    emulate -L zsh
+    print $(( [#16] 255 ))
+    print $(( [##16] 255 ))
+    setopt cbases
+    print $(( [#16] 255 ))
+    print $(( [##16] 255 ))
+  }
+  fn
+0:doubled # in base removes radix
+>16#FF
+>FF
+>0xFF
+>FF
+


-- 
Peter Stephenson <pws@csr.com>                  Software Engineer
CSR PLC, Churchill House, Cambridge Business Park, Cowley Road
Cambridge, CB4 0WZ, UK                          Tel: +44 (0)1223 692070