Mercurial > hg > xemacs-beta
annotate lib-src/tcp.c @ 5366:f00192e1cd49
Examining the result of #'length: `eql', not `=', it's better style & cheaper
2011-03-08 Aidan Kehoe <kehoea@parhasard.net>
* buff-menu.el (list-buffers-noselect):
* byte-optimize.el (byte-optimize-identity):
* byte-optimize.el (byte-optimize-if):
* byte-optimize.el (byte-optimize-nth):
* byte-optimize.el (byte-optimize-nthcdr):
* bytecomp.el (byte-compile-warn-wrong-args):
* bytecomp.el (byte-compile-two-args-19->20):
* bytecomp.el (byte-compile-list):
* bytecomp.el (byte-compile-beginning-of-line):
* bytecomp.el (byte-compile-set):
* bytecomp.el (byte-compile-set-default):
* bytecomp.el (byte-compile-values):
* bytecomp.el (byte-compile-values-list):
* bytecomp.el (byte-compile-integerp):
* bytecomp.el (byte-compile-multiple-value-list-internal):
* bytecomp.el (byte-compile-throw):
* cl-macs.el (cl-do-arglist):
* cl-macs.el (cl-parse-loop-clause):
* cl-macs.el (multiple-value-bind):
* cl-macs.el (multiple-value-setq):
* cl-macs.el (get-setf-method):
* cmdloop.el (command-error):
* cmdloop.el (y-or-n-p-minibuf):
* cmdloop.el (yes-or-no-p-minibuf):
* coding.el (unencodable-char-position):
* cus-edit.el (custom-face-prompt):
* cus-edit.el (custom-buffer-create-internal):
* cus-edit.el (widget-face-action):
* cus-edit.el (custom-group-value-create):
* descr-text.el (describe-char-unicode-data):
* dialog-gtk.el (popup-builtin-question-dialog):
* dragdrop.el (experimental-dragdrop-drop-log-function):
* dragdrop.el (experimental-dragdrop-drop-mime-default):
* easymenu.el (easy-menu-add):
* easymenu.el (easy-menu-remove):
* faces.el (read-face-name):
* faces.el (set-face-stipple):
* files.el (file-name-non-special):
* font.el (font-combine-fonts):
* font.el (font-set-face-font):
* font.el (font-parse-rgb-components):
* font.el (font-rgb-color-p):
* font.el (font-color-rgb-components):
* gnuserv.el (gnuserv-edit-files):
* help.el (key-or-menu-binding):
* help.el (function-documentation-1):
* help.el (function-documentation):
* info.el (info):
* isearch-mode.el (isearch-exit):
* isearch-mode.el (isearch-edit-string):
* isearch-mode.el (isearch-*-char):
* isearch-mode.el (isearch-complete1):
* ldap.el (ldap-encode-country-string):
* ldap.el (ldap-decode-string):
* minibuf.el (read-file-name-internal-1):
* minibuf.el (read-non-nil-coding-system):
* minibuf.el (get-user-response):
* mouse.el (drag-window-divider):
* mule/ccl.el:
* mule/ccl.el (ccl-compile-if):
* mule/ccl.el (ccl-compile-break):
* mule/ccl.el (ccl-compile-repeat):
* mule/ccl.el (ccl-compile-write-repeat):
* mule/ccl.el (ccl-compile-call):
* mule/ccl.el (ccl-compile-end):
* mule/ccl.el (ccl-compile-read-multibyte-character):
* mule/ccl.el (ccl-compile-write-multibyte-character):
* mule/ccl.el (ccl-compile-translate-character):
* mule/ccl.el (ccl-compile-mule-to-unicode):
* mule/ccl.el (ccl-compile-unicode-to-mule):
* mule/ccl.el (ccl-compile-lookup-integer):
* mule/ccl.el (ccl-compile-lookup-character):
* mule/ccl.el (ccl-compile-map-multiple):
* mule/ccl.el (ccl-compile-map-single):
* mule/devan-util.el (devanagari-compose-to-one-glyph):
* mule/devan-util.el (devanagari-composition-component):
* mule/mule-cmds.el (finish-set-language-environment):
* mule/viet-util.el:
* mule/viet-util.el (viet-encode-viscii-char):
* multicast.el (open-multicast-group):
* newcomment.el (comment-quote-nested):
* newcomment.el (comment-region):
* newcomment.el (comment-dwim):
* regexp-opt.el (regexp-opt-group):
* replace.el (map-query-replace-regexp):
* specifier.el (derive-device-type-from-tag-set):
* subr.el (skip-chars-quote):
* test-harness.el (test-harness-from-buffer):
* test-harness.el (batch-test-emacs):
* wid-edit.el (widget-choice-action):
* wid-edit.el (widget-symbol-prompt-internal):
* wid-edit.el (widget-color-action):
* window-xemacs.el (push-window-configuration):
* window-xemacs.el (pop-window-configuration):
* window.el (quit-window):
* x-compose.el (electric-diacritic):
It's better style, and cheaper (often one assembler instruction
vs. a C funcall in the byte code), to use `eql' instead of `='
when it's clear what numerical type a given result will be. Change
much of our code to do this, with the help of a byte-compiler
change (not comitted) that looked for calls to #'length (which
always returns an integer) in its args.
| author | Aidan Kehoe <kehoea@parhasard.net> |
|---|---|
| date | Tue, 08 Mar 2011 23:41:52 +0000 |
| parents | cd167465bf69 |
| children | b9167d522a9a |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 613 | 2 * TCP/IP stream emulation for XEmacs. |
| 0 | 3 * Copyright (C) 1988, 1989, 1992, 1993 Free Software Foundation, Inc. |
| 4 | |
| 5 * Author: Masanobu Umeda | |
| 6 * Maintainer: umerin@mse.kyutech.ac.jp | |
| 7 | |
| 613 | 8 This file is part of XEmacs. |
| 0 | 9 |
| 613 | 10 XEmacs is free software; you can redistribute it and/or modify |
| 0 | 11 it under the terms of the GNU General Public License as published by |
| 12 the Free Software Foundation; either version 2, or (at your option) | |
| 13 any later version. | |
| 14 | |
| 613 | 15 XEmacs is distributed in the hope that it will be useful, |
| 0 | 16 but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 18 GNU General Public License for more details. | |
| 19 | |
| 20 You should have received a copy of the GNU General Public License | |
| 613 | 21 along with XEmacs; see the file COPYING. If not, write to |
|
5287
cd167465bf69
More permission consistency.
Stephen J. Turnbull <stephen@xemacs.org>
parents:
978
diff
changeset
|
22 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
| 0 | 23 Boston, MA 02111-1307, USA. |
| 24 | |
| 25 * | |
| 26 * Yasunari, Itoh at PFU limited contributed for Fujitsu UTS and SX/A. | |
| 27 * | |
| 28 * Thu Apr 6 13:47:37 JST 1989 | |
| 29 * USG fixes by Sakaeda <saka@mickey.trad.pf.fujitsu.junet> | |
| 30 * | |
| 31 * For Fujitsu UTS compile with: | |
| 32 * cc -O -o tcp tcp.c -DFUJITSU_UTS -lu -lsocket | |
| 33 */ | |
| 34 | |
| 978 | 35 #ifdef HAVE_CONFIG_H |
| 36 #include <config.h> | |
| 37 #endif | |
| 0 | 38 #include <stdio.h> |
| 39 #include <fcntl.h> | |
| 40 #include <ctype.h> | |
| 41 #include <sys/types.h> | |
| 42 | |
| 43 #ifdef FUJITSU_UTS | |
| 44 #define USG | |
| 45 #include <sys/ucbtypes.h> | |
| 46 #include <sys/tisp/socket.h> | |
| 47 #include <netdb.h> | |
| 48 #include <sys/tisp/in.h> | |
| 49 #else | |
| 50 #include <sys/socket.h> | |
| 51 #include <netdb.h> | |
| 52 #include <netinet/in.h> | |
| 53 #endif | |
| 54 | |
| 55 #ifdef USG | |
| 56 #include <sys/stat.h> | |
| 978 | 57 #include "syssignal.h" |
| 0 | 58 #endif |
| 59 | |
| 60 #ifdef USG | |
| 61 int selectable = 1; | |
| 62 | |
| 63 sigout () | |
| 64 { | |
| 65 fcntl (fileno (stdin), F_SETFL, 0); | |
| 66 exit (-1); | |
| 67 } | |
| 68 #endif | |
| 69 | |
| 70 main (argc, argv) | |
| 71 int argc; | |
| 72 char *argv[]; | |
| 73 { | |
| 74 struct hostent *host; | |
| 75 struct sockaddr_in sockin, sockme; | |
| 76 struct servent *serv; | |
| 77 char *hostname = NULL; | |
| 78 char *service = "nntp"; | |
| 79 int port; | |
| 80 int readfds; | |
| 81 int writefds; | |
| 82 int server; /* NNTP Server */ | |
| 83 int emacsIn = fileno (stdin); /* Emacs intput */ | |
| 84 int emacsOut = fileno (stdout); /* Emacs output */ | |
| 85 char buffer[1024]; | |
| 86 int nbuffer; /* Number of bytes in buffer */ | |
| 87 int wret; | |
| 88 char *retry; /* retry bufferp */ | |
| 89 int false = 0; /* FALSE flag for setsockopt () */ | |
| 90 | |
| 91 if (argc < 2) | |
| 92 { | |
| 93 fprintf (stderr, "Usage: %s HOST [SERVICE]\n", argv[0]); | |
| 94 exit (1); | |
| 95 } | |
| 96 if (argc >= 2) | |
| 97 hostname = argv[1]; | |
| 98 if (argc >= 3) | |
| 99 service = argv[2]; | |
| 100 | |
| 101 if ((host = gethostbyname (hostname)) == NULL) | |
| 102 { | |
| 103 perror ("gethostbyname"); | |
| 104 exit (1); | |
| 105 } | |
| 106 if (isdigit (service[0])) | |
| 107 port = atoi (service); | |
| 108 else | |
| 109 { | |
| 110 serv = getservbyname (service, "tcp"); | |
| 111 if (serv == NULL) | |
| 112 { | |
| 113 perror ("getservbyname"); | |
| 114 exit (1); | |
| 115 } | |
| 116 port = serv->s_port; | |
| 117 } | |
| 118 | |
| 119 memset (&sockin, 0, sizeof (sockin)); | |
| 120 sockin.sin_family = host->h_addrtype; | |
| 121 memcpy (&sockin.sin_addr, host->h_addr, host->h_length); | |
| 122 sockin.sin_port = port; | |
| 123 if ((server = socket (AF_INET, SOCK_STREAM, 0)) < 0) | |
| 124 { | |
| 125 perror ("socket"); | |
| 126 exit (1); | |
| 127 } | |
| 128 if (setsockopt (server, SOL_SOCKET, SO_REUSEADDR, &false, sizeof (false))) | |
| 129 { | |
| 130 perror ("setsockopt"); | |
| 131 exit (1); | |
| 132 } | |
| 133 memset (&sockme, 0, sizeof (sockme)); | |
| 134 sockme.sin_family = sockin.sin_family; | |
| 135 sockme.sin_addr.s_addr = INADDR_ANY; | |
| 136 if (bind (server, &sockme, sizeof (sockme)) < 0) | |
| 137 { | |
| 138 perror ("bind"); | |
| 139 exit (1); | |
| 140 } | |
| 141 if (connect (server, &sockin, sizeof (sockin)) < 0) | |
| 142 { | |
| 143 perror ("connect"); | |
| 144 close (server); | |
| 145 exit (1); | |
| 146 } | |
| 147 | |
| 148 #ifdef O_NDELAY | |
| 149 fcntl (server, F_SETFL, O_NDELAY); | |
| 150 | |
| 151 #ifdef USG | |
| 152 /* USG pipe cannot not select emacsIn */ | |
| 153 { | |
| 154 struct stat statbuf; | |
| 155 fstat (emacsIn, &statbuf); | |
| 156 if (statbuf.st_mode & 010000) | |
| 157 selectable = 0; | |
| 158 if (!selectable) | |
| 159 { | |
| 160 signal (SIGINT, sigout); | |
| 161 fcntl (emacsIn, F_SETFL, O_NDELAY); | |
| 162 } | |
| 163 } | |
| 164 #endif | |
| 165 #endif | |
| 166 | |
| 167 /* Connection established. */ | |
| 168 while (1) | |
| 169 { | |
| 170 readfds = (1 << server) | (1 << emacsIn); | |
| 171 if (select (32, &readfds, NULL, NULL, (struct timeval *)NULL) == -1) | |
| 172 { | |
| 173 perror ("select"); | |
| 174 exit (1); | |
| 175 } | |
| 176 if (readfds & (1 << emacsIn)) | |
| 177 { | |
| 178 /* From Emacs */ | |
| 179 nbuffer = read (emacsIn, buffer, sizeof buffer -1); | |
| 180 | |
| 181 #ifdef USG | |
| 182 if (selectable && nbuffer == 0) | |
| 183 { | |
| 184 goto finish; | |
| 185 } | |
| 186 else if (!(readfds & (1 << server)) && nbuffer == 0) | |
| 187 { | |
| 188 sleep (1); | |
| 189 } | |
| 190 else | |
| 191 #else | |
| 192 if (nbuffer == 0) | |
| 193 goto finish; | |
| 194 #endif | |
| 195 for (retry = buffer; nbuffer > 0; nbuffer -= wret, retry += wret) | |
| 196 { | |
| 197 writefds = 1 << server; | |
| 198 if (select (server+1, NULL, &writefds, NULL, (struct timeval*)NULL) == -1) | |
| 199 { | |
| 200 perror ("select"); | |
| 201 exit (1); | |
| 202 } | |
| 203 wret = write (server, retry, nbuffer); | |
| 204 if (wret < 0) goto finish; | |
| 205 } | |
| 206 } | |
| 207 if (readfds & (1 << server)) | |
| 208 { | |
| 209 /* From NNTP server */ | |
| 210 nbuffer = read (server, buffer, sizeof buffer -1); | |
| 211 if (nbuffer == 0) | |
| 212 goto finish; | |
| 213 for (retry = buffer; nbuffer > 0; nbuffer -= wret, retry += wret) | |
| 214 { | |
| 215 writefds = 1 << emacsOut; | |
| 216 #ifdef USG | |
| 217 if (selectable) | |
| 218 #endif | |
| 219 if (select (emacsOut+1, NULL, &writefds, NULL, (struct timeval*)NULL) == -1) | |
| 220 { | |
| 221 perror ("select"); | |
| 222 exit (1); | |
| 223 } | |
| 224 wret = write (emacsOut, retry, nbuffer); | |
| 225 if (wret < 0) goto finish; | |
| 226 } | |
| 227 } | |
| 228 } | |
| 229 | |
| 230 /* End of communication. */ | |
| 231 finish: | |
| 232 close (server); | |
| 233 #ifdef USG | |
| 234 if (!selectable) fcntl (emacsIn, F_SETFL, 0); | |
| 235 #endif | |
| 236 close (emacsIn); | |
| 237 close (emacsOut); | |
| 238 exit (0); | |
| 239 } |