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view lisp/multicast.el @ 4885:6772ce4d982b
Fix hash tables, #'member*, #'assoc*, #'eql compiler macros if bignums
lisp/ChangeLog addition:
2010-01-24 Aidan Kehoe <kehoea@parhasard.net>
Correct the semantics of #'member*, #'eql, #'assoc* in the
presence of bignums; change the integerp byte code to fixnump
semantics.
* bytecomp.el (fixnump, integerp, byte-compile-integerp):
Change the integerp byte code to fixnump; add a byte-compile
method to integerp using fixnump and numberp and avoiding a
funcall most of the time, since in the non-core contexts where
integerp is used, it's mostly distinguishing between fixnums and
things that are not numbers at all.
* byte-optimize.el (side-effect-free-fns, byte-after-unbind-ops)
(byte-compile-side-effect-and-error-free-ops):
Replace the integerp bytecode with fixnump; add fixnump to the
side-effect-free-fns. Add the other extended number type
predicates to the list in passing.
* obsolete.el (floatp-safe): Mark this as obsolete.
* cl.el (eql): Go into more detail in the docstring here. Don't
bother checking whether both arguments are numbers; one is enough,
#'equal will fail correctly if they have distinct types.
(subst): Replace a call to #'integerp (deciding whether to use
#'memq or not) with one to #'fixnump.
Delete most-positive-fixnum, most-negative-fixnum from this file;
they're now always in C, so they can't be modified from Lisp.
* cl-seq.el (member*, assoc*, rassoc*):
Correct these functions in the presence of bignums.
* cl-macs.el (cl-make-type-test): The type test for a fixnum is
now fixnump. Ditch floatp-safe, use floatp instead.
(eql): Correct this compiler macro in the presence of bignums.
(assoc*): Correct this compiler macro in the presence of bignums.
* simple.el (undo):
Change #'integerp to #'fixnump here, since we use #'delq with the
same value as ELT a few lines down.
src/ChangeLog addition:
2010-01-24 Aidan Kehoe <kehoea@parhasard.net>
Fix problems with #'eql, extended number types, and the hash table
implementation; change the Bintegerp bytecode to fixnump semantics
even on bignum builds, since #'integerp can have a fast
implementation in terms of #'fixnump for most of its extant uses,
but not vice-versa.
* lisp.h: Always #include number.h; we want the macros provided in
it, even if the various number types are not available.
* number.h (NON_FIXNUM_NUMBER_P): New macro, giving 1 when its
argument is of non-immediate number type. Equivalent to FLOATP if
WITH_NUMBER_TYPES is not defined.
* elhash.c (lisp_object_eql_equal, lisp_object_eql_hash):
Use NON_FIXNUM_NUMBER_P in these functions, instead of FLOATP,
giving more correct behaviour in the presence of the extended
number types.
* bytecode.c (Bfixnump, execute_optimized_program):
Rename Bintegerp to Bfixnump; change its semantics to reflect the
new name on builds with bignum support.
* data.c (Ffixnump, Fintegerp, syms_of_data, vars_of_data):
Always make #'fixnump available, even on non-BIGNUM builds;
always implement #'integerp in this file, even on BIGNUM builds.
Move most-positive-fixnum, most-negative-fixnum here from
number.c, so they are Lisp constants even on builds without number
types, and attempts to change or bind them error.
Use the NUMBERP and INTEGERP macros even on builds without
extended number types.
* data.c (fixnum_char_or_marker_to_int):
Rename this function from integer_char_or_marker_to_int, to better
reflect the arguments it accepts.
* number.c (Fevenp, Foddp, syms_of_number):
Never provide #'integerp in this file. Remove #'oddp,
#'evenp; their implementations are overridden by those in cl.el.
* number.c (vars_of_number):
most-positive-fixnum, most-negative-fixnum are no longer here.
man/ChangeLog addition:
2010-01-23 Aidan Kehoe <kehoea@parhasard.net>
Generally: be careful to say fixnum, not integer, when talking
about fixed-precision integral types. I'm sure I've missed
instances, both here and in the docstrings, but this is a decent
start.
* lispref/text.texi (Columns):
Document where only fixnums, not integers generally, are accepted.
(Registers):
Remove some ancient char-int confoundance here.
* lispref/strings.texi (Creating Strings, Creating Strings):
Be more exact in describing where fixnums but not integers in
general are accepted.
(Creating Strings): Use a more contemporary example to illustrate
how concat deals with lists including integers about #xFF. Delete
some obsolete documentation on same.
(Char Table Types): Document that only fixnums are accepted as
values in syntax tables.
* lispref/searching.texi (String Search, Search and Replace):
Be exact in describing where fixnums but not integers in general
are accepted.
* lispref/range-tables.texi (Range Tables): Be exact in describing
them; only fixnums are accepted to describe ranges.
* lispref/os.texi (Killing XEmacs, User Identification)
(Time of Day, Time Conversion):
Be more exact about using fixnum where only fixed-precision
integers are accepted.
* lispref/objects.texi (Integer Type): Be more exact (and
up-to-date) about the possible values for
integers. Cross-reference to documentation of the bignum extension.
(Equality Predicates):
(Range Table Type):
(Array Type): Use fixnum, not integer, to describe a
fixed-precision integer.
(Syntax Table Type): Correct some English syntax here.
* lispref/numbers.texi (Numbers): Change the phrasing here to use
fixnum to mean the fixed-precision integers normal in emacs.
Document that our terminology deviates from that of Common Lisp,
and that we're working on it.
(Compatibility Issues): Reiterate the Common Lisp versus Emacs
Lisp compatibility issues.
(Comparison of Numbers, Arithmetic Operations):
* lispref/commands.texi (Command Loop Info, Working With Events):
* lispref/buffers.texi (Modification Time):
Be more exact in describing where fixnums but not integers in
general are accepted.
author | Aidan Kehoe <kehoea@parhasard.net> |
---|---|
date | Sun, 24 Jan 2010 15:21:27 +0000 |
parents | 2b6fa2618f76 |
children | 9058351b0236 |
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;;; multicast.el --- lisp frontend for multicast connections in XEmacs ;; Copyright (C) 1997-2000 Didier Verna. ;; Copyright (C) 2002 Ben Wing. ;; Author: Didier Verna <didier@xemacs.org> ;; Maintainer: Didier Verna <didier@xemacs.org> ;; Created: Thu Dec 4 16:37:39 1997 ;; Last Revision: Mon Jan 19 19:10:50 1998 ;; Current Version: 0.4 ;; Keywords: dumped comm processes ;; This file is part of XEmacs. ;; XEmacs is free software; you can redistribute it and/or modify ;; it under the terms of the GNU General Public License as published by ;; the Free Software Foundation; either version 2 of the License, or ;; (at your option) any later version. ;; XEmacs is distributed in the hope that it will be useful, ;; but WITHOUT ANY WARRANTY; without even the implied warranty of ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ;; GNU General Public License for more details. ;; You should have received a copy of the GNU General Public License ;; along with this program; if not, write to the Free Software ;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. ;;; Commentary: ;; This file just contains a lisp frontend to the internal function ;; open-multicast-group-internal written in C and belonging to process.c ;; Well, nothing much to say about it ... read the doc string. ;;; Change Log: ;; Rev. of Mon Jan 19 19:04:44 1998 : packaging cleanup ;; Rev. of Thu Dec 11 13:54:26 1997 : updated the docstring ;; Rev. of Mon Dec 8 15:28:47 1997 : Improved the doc string ;; Rev. of Thu Dec 4 16:38:09 1997 : Initial Version. ;;; Code: (defun open-multicast-group (name buffer address) "Open a multicast connection on the specified address. Returns a process object to represent the connection. Input and output work as for subprocesses; `delete-process' closes it. NAME is a name for the process. It is modified if necessary to make it unique. BUFFER is the buffer (or buffer-name) to associate with the process. Process output goes at the end of that buffer, unless you specify an output stream or filter function to handle the output. BUFFER may be also nil, meaning that this process is not associated with any buffer. ADDRESS specifies a standard multicast address \"dest/port/ttl\": dest is an internet address between 224.0.0.0 and 239.255.255.255 port is a communication port like in traditional unicast ttl is the time-to-live (15 for site, 63 for region and 127 for world). WARNING: it is *strongly* recommended to avoid using groups beginning with 224 or 239. Such groups are considered 'admin' groups, and may behave in a surprising way ... The read/write coding systems used for process I/O on the process are determined as follows: 1. `coding-system-for-read', `coding-system-for-write', if non-nil. (Intended as a temporary overriding mechanism for use by Lisp code.) 2. The matching value for the port from `network-coding-system-alist', if any, and if non-nil. The value may be either a single coding system, used for both read and write; or a cons of read/write; or a function, called to get one of the other two values. 3. The value of `default-network-coding-system', which should be a cons of read/write coding systems, if the values are non-nil. 4. The coding system `undecided' for read, and `raw-text' for write. Note that the processes of determining the read and write coding systems proceed essentially independently one from the other, as in `start-process'. You can change the coding systems later on using `set-process-coding-system', `set-process-input-coding-system', or `set-process-output-coding-system'." (let (dest port ttl) ;; We check only the general form of the multicast address. ;; The rest will be handled by the internal function. (string-match "^\\([0-9\\.]+\\)/\\([0-9]+\\)/\\([0-9]+\\)$" address) (and (not (and (= (match-beginning 0) 0) (= (match-end 0) (length address)))) (error "malformed multicast address: %s" address)) (and (not (setq dest (match-string 1 address))) (error "invalid destination specification.")) (and (= 0 (setq port (string-to-int (match-string 2 address)))) (error "invalid port specification.")) (and (= 0 (setq ttl (string-to-int (match-string 3 address)))) (error "invalid ttl specification.")) (let (cs-r cs-w) (let (ret) (catch 'found (let ((alist network-coding-system-alist) (case-fold-search nil) pattern) (while alist (setq pattern (car (car alist))) (and (cond ((numberp pattern) (and (numberp port) (eq pattern port))) ((stringp pattern) (or (and (stringp port) (string-match pattern port)) (and (numberp port) (string-match pattern (number-to-string port)))))) (throw 'found (setq ret (cdr (car alist))))) (setq alist (cdr alist)) ))) (if (functionp ret) (setq ret (funcall ret 'open-multicast-group port))) (cond ((consp ret) (setq cs-r (car ret) cs-w (cdr ret))) ((and ret (find-coding-system ret)) (setq cs-r ret cs-w ret)))) (let ((coding-system-for-read (or coding-system-for-read cs-r (car default-network-coding-system) 'undecided)) (coding-system-for-write (or coding-system-for-write cs-w (cdr default-network-coding-system) 'raw-text))) (declare-fboundp (open-multicast-group-internal name buffer dest port ttl)))))) ;;; multicast.el ends here