Provide %b in #'format; use it for converting between ints and bit vectors. lisp/ChangeLog addition: 2007-12-17 Aidan Kehoe <kehoea@parhasard.net> * subr.el (integer-to-bit-vector): New. * subr.el (bit-vector-to-integer): New. Provide naive implementations using the Lisp reader for these. src/ChangeLog addition: 2007-12-17 Aidan Kehoe <kehoea@parhasard.net> * doprnt.c (emacs_doprnt_1): Add support for formatted printing of both longs and bignums as base 2. * editfns.c (Fformat): Document the new %b escape for #'format. * lisp.h: Make ulong_to_bit_string available beside long_to_string. * lread.c: Fix a bug where the integer base was being ignored in certain contexts; thank you Sebastian Freundt. This is necessary for correct behaviour of #'integer-to-bit-vector and #'bit-vector-to-integer, just added to subr.el * print.c (ulong_to_bit_string): New. Analagous to long_to_string, but used all the time when %b is encountered, since we can't pass that to sprintf. man/ChangeLog addition: 2007-12-17 Aidan Kehoe <kehoea@parhasard.net> * lispref/strings.texi (Formatting Strings): Document %b for binary output.

--- a/src/ChangeLog	Fri Dec 14 14:25:04 2007 +0100
+++ b/src/ChangeLog	Mon Dec 17 08:44:14 2007 +0100
@@ -1,3 +1,21 @@
+2007-12-17  Aidan Kehoe  <kehoea@parhasard.net>
+
+	* doprnt.c (emacs_doprnt_1):
+	Add support for formatted printing of both longs and bignums as
+	base 2.
+	* editfns.c (Fformat):
+	Document the new %b escape for #'format. 
+	* lisp.h:
+	Make ulong_to_bit_string available beside long_to_string. 
+	* lread.c:
+	Fix a bug where the integer base was being ignored in certain
+	contexts; thank you Sebastian Freundt. This is necessary for
+	correct behaviour of #'integer-to-bit-vector and
+	#'bit-vector-to-integer, just added to subr.el
+	* print.c (ulong_to_bit_string): New.
+	Analagous to long_to_string, but used all the time when %b is
+	encountered, since we can't pass that to sprintf. 	
+
 2007-12-12  Aidan Kehoe  <kehoea@parhasard.net>
 
 	* config.h.in: