annotate lisp/multicast.el @ 1315:70921960b980

[xemacs-hg @ 2003-02-20 08:19:28 by ben] check in makefile fixes et al Makefile.in.in: Major surgery. Move all stuff related to building anything in the src/ directory into src/. Simplify the dependencies -- everything in src/ is dependent on the single entry `src' in MAKE_SUBDIRS. Remove weirdo targets like `all-elc[s]', dump-elc[s], etc. mule/mule-msw-init.el: Removed. Delete this file. mule/mule-win32-init.el: New file, with stuff from mule-msw-init.el -- not just for MS Windows native, boys and girls! bytecomp.el: Change code inserted to catch trying to load a Mule-only .elc file in a non-Mule XEmacs. Formerly you got the rather cryptic "The required feature `mule' cannot be provided". Now you get "Loading this file requires Mule support". finder.el: Remove dependency on which directory this function is invoked from. update-elc.el: Don't mess around with ../src/BYTECOMPILE_CHANGE. Now that Makefile.in.in and xemacs.mak are in sync, both of them use NEEDTODUMP and the other one isn't used. dumped-lisp.el: Rewrite in terms of `list' and `nconc' instead of assemble-list, so we can have arbitrary forms, not just `when-feature'. very-early-lisp.el: Nuke this file. finder-inf.el, packages.el, update-elc.el, update-elc-2.el, loadup.el, make-docfile.el: Eliminate references to very-early-lisp. msw-glyphs.el: Comment clarification. xemacs.mak: Add macros DO_TEMACS, DO_XEMACS, and a few others; this macro section is now completely in sync with src/Makefile.in.in. Copy check-features, load-shadows, and rebuilding finder-inf.el from src/Makefile.in.in. The main build/dump/recompile process is now synchronized with src/Makefile.in.in. Change `WARNING' to `NOTE' and `error checking' to `error-checking' TO avoid tripping faux warnings and errors in the VC++ IDE. Makefile.in.in: Major surgery. Move all stuff related to building anything in the src/ directory from top-level Makefile.in.in to here. Simplify the dependencies. Rearrange into logical subsections. Synchronize the main compile/dump/build-elcs section with xemacs.mak, which is already clean and in good working order. Remove weirdo targets like `all-elc[s]', dump-elc[s], etc. Add additional levels of macros \(e.g. DO_TEMACS, DO_XEMACS, TEMACS_BATCH, XEMACS_BATCH, XEMACS_BATCH_PACKAGES) to factor out duplicated stuff. Clean up handling of "HEAP_IN_DATA" (Cygwin) so it doesn't need to ignore the return value from dumping. Add .NO_PARALLEL since various aspects of building and dumping must be serialized but do not always have dependencies between them (this is impossible in some cases). Everything related to src/ now gets built in one pass in this directory by just running `make' (except the Makefiles themselves and config.h, paths.h, Emacs.ad.h, and other generated .h files). console.c: Update list of possibly valid console types. emacs.c: Rationalize the specifying and handling of the type of the first frame. This was originally prompted by a workspace in which I got GTK to compile under C++ and in the process fixed it so it could coexist with X in the same build -- hence, a combined TTY/X/MS-Windows/GTK build is now possible under Cygwin. (However, you can't simultaneously *display* more than one kind of device connection -- but getting that to work is not that difficult. Perhaps a project for a bored grad student. I (ben) would do it but don't see the use.) To make sense of this, I added new switches that can be used to specifically indicate the window system: -x [aka --use-x], -tty \[aka --use-tty], -msw [aka --use-ms-windows], -gtk [aka --use-gtk], and -gnome [aka --use-gnome, same as --use-gtk]. -nw continues as an alias for -tty. When none have been given, XEmacs checks for other parameters implying particular device types (-t -> tty, -display -> x [or should it have same treatment as DISPLAY below?]), and has ad-hoc logic afterwards: if env var DISPLAY is set, use x (or gtk? perhaps should check whether gnome is running), else MS Windows if it exsits, else TTY if it exists, else stream, and you must be running in batch mode. This also fixes an existing bug whereby compiling with no x, no mswin, no tty, when running non- interactively (e.g. to dump) I get "sorry, must have TTY support". emacs.c: Turn on Vstack_trace_on_error so that errors are debuggable even when occurring extremely early in reinitialization. emacs.c: Try to make sure that the user can see message output under Windows (i.e. it doesn't just disappear right away) regardless of when it occurs, e.g. in the middle of creating the first frame. emacs.c: Define new function `emacs-run-status', indicating whether XEmacs is noninteractive or interactive, whether raw, post-dump/pdump-load or run-temacs, whether we are dumping, whether pdump is in effect. event-stream.c: It's "mommas are fat", not "momas are fat". Fix other typo. event-stream.c: Conditionalize in_menu_callback check on HAVE_MENUBARS, because it won't exist on w/o menubar support, lisp.h: More hackery on RETURN_NOT_REACHED. Cygwin v3.2 DOES complain here if RETURN_NOT_REACHED() is blank, as it is for GCC 2.5+. So make it blank only for GCC 2.5 through 2.999999999999999. Declare Vstack_trace_on_error. profile.c: Need to include "profile.h" to fix warnings. sheap.c: Don't fatal() when need to rerun Make, just stderr_out() and exit(0). That way we can distinguish between a dumping failing expectedly (due to lack of stack space, triggering another dump) and unexpectedly, in which case, we want to stop building. (or go on, if -K is given) syntax.c, syntax.h: Use ints where they belong, and enum syntaxcode's where they belong, and fix warnings thereby. syntax.h: Fix crash caused by an edge condition in the syntax-cache macros. text.h: Spacing fixes. xmotif.h: New file, to get around shadowing warnings. EmacsManager.c, event-Xt.c, glyphs-x.c, gui-x.c, input-method-motif.c, xmmanagerp.h, xmprimitivep.h: Include xmotif.h. alloc.c: Conditionalize in_malloc on ERROR_CHECK_MALLOC. config.h.in, file-coding.h, fileio.c, getloadavg.c, select-x.c, signal.c, sysdep.c, sysfile.h, systime.h, text.c, unicode.c: Eliminate HAVE_WIN32_CODING_SYSTEMS, use WIN32_ANY instead. Replace defined (WIN32_NATIVE) || defined (CYGWIN) with WIN32_ANY. lisp.h: More futile attempts to walk and chew gum at the same time when dealing with subr's that don't return.
author ben
date Thu, 20 Feb 2003 08:19:44 +0000
parents 2b6fa2618f76
children 9058351b0236
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1 ;;; multicast.el --- lisp frontend for multicast connections in XEmacs
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2
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3 ;; Copyright (C) 1997-2000 Didier Verna.
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4 ;; Copyright (C) 2002 Ben Wing.
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5
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6 ;; Author: Didier Verna <didier@xemacs.org>
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7 ;; Maintainer: Didier Verna <didier@xemacs.org>
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8 ;; Created: Thu Dec 4 16:37:39 1997
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9 ;; Last Revision: Mon Jan 19 19:10:50 1998
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10 ;; Current Version: 0.4
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11 ;; Keywords: dumped comm processes
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12
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13 ;; This file is part of XEmacs.
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14
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15 ;; XEmacs is free software; you can redistribute it and/or modify
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16 ;; it under the terms of the GNU General Public License as published by
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17 ;; the Free Software Foundation; either version 2 of the License, or
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18 ;; (at your option) any later version.
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20 ;; XEmacs is distributed in the hope that it will be useful,
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21 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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22 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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23 ;; GNU General Public License for more details.
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24
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25 ;; You should have received a copy of the GNU General Public License
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26 ;; along with this program; if not, write to the Free Software
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27 ;; Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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28
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29
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30 ;;; Commentary:
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31
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32 ;; This file just contains a lisp frontend to the internal function
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33 ;; open-multicast-group-internal written in C and belonging to process.c
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34 ;; Well, nothing much to say about it ... read the doc string.
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35
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36
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37 ;;; Change Log:
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38
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39 ;; Rev. of Mon Jan 19 19:04:44 1998 : packaging cleanup
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40 ;; Rev. of Thu Dec 11 13:54:26 1997 : updated the docstring
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41 ;; Rev. of Mon Dec 8 15:28:47 1997 : Improved the doc string
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42 ;; Rev. of Thu Dec 4 16:38:09 1997 : Initial Version.
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43
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44
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45 ;;; Code:
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46
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47 (defun open-multicast-group (name buffer address)
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48 "Open a multicast connection on the specified address.
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49 Returns a process object to represent the connection.
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50 Input and output work as for subprocesses; `delete-process' closes it.
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51 NAME is a name for the process. It is modified if necessary to make it unique.
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52 BUFFER is the buffer (or buffer-name) to associate with the process.
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53 Process output goes at the end of that buffer, unless you specify an output
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54 stream or filter function to handle the output.
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55 BUFFER may be also nil, meaning that this process is not associated with any
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56 buffer.
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57 ADDRESS specifies a standard multicast address \"dest/port/ttl\":
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58 dest is an internet address between 224.0.0.0 and 239.255.255.255
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59 port is a communication port like in traditional unicast
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60 ttl is the time-to-live (15 for site, 63 for region and 127 for world).
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61
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62 WARNING: it is *strongly* recommended to avoid using groups beginning with
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63 224 or 239. Such groups are considered 'admin' groups, and may
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64 behave in a surprising way ...
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65
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66 The read/write coding systems used for process I/O on the process are
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67 determined as follows:
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68
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69 1. `coding-system-for-read', `coding-system-for-write', if non-nil.
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70 (Intended as a temporary overriding mechanism for use by Lisp
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71 code.)
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72 2. The matching value for the port from `network-coding-system-alist',
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73 if any, and if non-nil. The value may be either a single coding
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74 system, used for both read and write; or a cons of read/write; or a
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75 function, called to get one of the other two values.
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76 3. The value of `default-network-coding-system', which should be a cons
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77 of read/write coding systems, if the values are non-nil.
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78 4. The coding system `undecided' for read, and `raw-text' for write.
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79
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80 Note that the processes of determining the read and write coding systems
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81 proceed essentially independently one from the other, as in `start-process'.
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82
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83 You can change the coding systems later on using
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84 `set-process-coding-system', `set-process-input-coding-system', or
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85 `set-process-output-coding-system'."
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86 (let (dest port ttl)
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87 ;; We check only the general form of the multicast address.
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88 ;; The rest will be handled by the internal function.
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89 (string-match "^\\([0-9\\.]+\\)/\\([0-9]+\\)/\\([0-9]+\\)$" address)
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90 (and (not (and (= (match-beginning 0) 0)
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91 (= (match-end 0) (length address))))
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92 (error "malformed multicast address: %s" address))
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93 (and (not (setq dest (match-string 1 address)))
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94 (error "invalid destination specification."))
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95 (and (= 0 (setq port (string-to-int (match-string 2 address))))
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96 (error "invalid port specification."))
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97 (and (= 0 (setq ttl (string-to-int (match-string 3 address))))
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98 (error "invalid ttl specification."))
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99 (let (cs-r cs-w)
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100 (let (ret)
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101 (catch 'found
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102 (let ((alist network-coding-system-alist)
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103 (case-fold-search nil)
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104 pattern)
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105 (while alist
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106 (setq pattern (car (car alist)))
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107 (and
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108 (cond ((numberp pattern)
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109 (and (numberp port)
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110 (eq pattern port)))
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111 ((stringp pattern)
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112 (or (and (stringp port)
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113 (string-match pattern port))
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114 (and (numberp port)
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115 (string-match pattern
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116 (number-to-string port))))))
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117 (throw 'found (setq ret (cdr (car alist)))))
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118 (setq alist (cdr alist))
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119 )))
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120 (if (functionp ret)
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121 (setq ret (funcall ret 'open-multicast-group port)))
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122 (cond ((consp ret)
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123 (setq cs-r (car ret)
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124 cs-w (cdr ret)))
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125 ((and ret (find-coding-system ret))
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126 (setq cs-r ret
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127 cs-w ret))))
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128 (let ((coding-system-for-read
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129 (or coding-system-for-read cs-r
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130 (car default-network-coding-system)
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131 'undecided))
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132 (coding-system-for-write
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133 (or coding-system-for-write cs-w
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134 (cdr default-network-coding-system)
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135 'raw-text)))
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136 (declare-fboundp (open-multicast-group-internal name buffer dest port
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137 ttl))))))
404
2f8bb876ab1d Import from CVS: tag r21-2-32
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138
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405dd6d1825b Import from CVS: tag r20-5b29
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139 ;;; multicast.el ends here