Mercurial > vim
annotate src/if_xcmdsrv.c @ 16819:91619e48e1a7 v8.1.1411
patch 8.1.1411: Coverity warns for divide by zero
commit https://github.com/vim/vim/commit/7833dab73c658e65f38553af89fd60c57a11ef49
Author: Bram Moolenaar <Bram@vim.org>
Date: Mon May 27 22:01:40 2019 +0200
patch 8.1.1411: Coverity warns for divide by zero
Problem: Coverity warns for divide by zero.
Solution: Make sure width is larger than zero.
| author | Bram Moolenaar <Bram@vim.org> |
|---|---|
| date | Mon, 27 May 2019 22:15:05 +0200 |
| parents | ef00b6bc186b |
| children | ce04ebdf26b8 |
| rev | line source |
|---|---|
|
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commit https://github.com/vim/vim/commit/edf3f97ae2af024708ebb4ac614227327033ca47
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1 /* vi:set ts=8 sts=4 sw=4 noet: |
| 7 | 2 * |
| 3 * VIM - Vi IMproved by Bram Moolenaar | |
| 4 * X command server by Flemming Madsen | |
| 5 * | |
| 6 * Do ":help uganda" in Vim to read copying and usage conditions. | |
| 7 * Do ":help credits" in Vim to see a list of people who contributed. | |
| 8 * See README.txt for an overview of the Vim source code. | |
| 9 * | |
| 10 * if_xcmdsrv.c: Functions for passing commands through an X11 display. | |
| 11 * | |
| 12 */ | |
| 13 | |
| 14 #include "vim.h" | |
| 15 #include "version.h" | |
| 16 | |
| 17 #if defined(FEAT_CLIENTSERVER) || defined(PROTO) | |
| 18 | |
| 19 # ifdef FEAT_X11 | |
| 20 # include <X11/Intrinsic.h> | |
| 21 # include <X11/Xatom.h> | |
| 22 # endif | |
| 23 | |
| 24 /* | |
| 1121 | 25 * This file provides procedures that implement the command server |
| 26 * functionality of Vim when in contact with an X11 server. | |
| 7 | 27 * |
| 28 * Adapted from TCL/TK's send command in tkSend.c of the tk 3.6 distribution. | |
| 29 * Adapted for use in Vim by Flemming Madsen. Protocol changed to that of tk 4 | |
| 30 */ | |
| 31 | |
| 32 /* | |
| 33 * Copyright (c) 1989-1993 The Regents of the University of California. | |
| 34 * All rights reserved. | |
| 35 * | |
| 36 * Permission is hereby granted, without written agreement and without | |
| 37 * license or royalty fees, to use, copy, modify, and distribute this | |
| 38 * software and its documentation for any purpose, provided that the | |
| 39 * above copyright notice and the following two paragraphs appear in | |
| 40 * all copies of this software. | |
| 41 * | |
| 42 * IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY FOR | |
| 43 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING OUT | |
| 44 * OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF THE UNIVERSITY OF | |
| 45 * CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 46 * | |
| 47 * THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES, | |
| 48 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY | |
| 49 * AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS | |
| 50 * ON AN "AS IS" BASIS, AND THE UNIVERSITY OF CALIFORNIA HAS NO OBLIGATION TO | |
| 51 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. | |
| 52 */ | |
| 53 | |
| 54 | |
| 55 /* | |
| 56 * When a result is being awaited from a sent command, one of | |
| 57 * the following structures is present on a list of all outstanding | |
| 58 * sent commands. The information in the structure is used to | |
| 59 * process the result when it arrives. You're probably wondering | |
| 60 * how there could ever be multiple outstanding sent commands. | |
| 61 * This could happen if Vim instances invoke each other recursively. | |
| 62 * It's unlikely, but possible. | |
| 63 */ | |
| 64 | |
| 65 typedef struct PendingCommand | |
| 66 { | |
| 67 int serial; /* Serial number expected in result. */ | |
| 68 int code; /* Result Code. 0 is OK */ | |
| 69 char_u *result; /* String result for command (malloc'ed). | |
| 70 * NULL means command still pending. */ | |
| 71 struct PendingCommand *nextPtr; | |
| 72 /* Next in list of all outstanding commands. | |
| 73 * NULL means end of list. */ | |
| 74 } PendingCommand; | |
| 75 | |
| 76 static PendingCommand *pendingCommands = NULL; | |
| 77 /* List of all commands currently | |
| 78 * being waited for. */ | |
| 79 | |
| 80 /* | |
| 81 * The information below is used for communication between processes | |
| 82 * during "send" commands. Each process keeps a private window, never | |
| 83 * even mapped, with one property, "Comm". When a command is sent to | |
| 84 * an interpreter, the command is appended to the comm property of the | |
| 85 * communication window associated with the interp's process. Similarly, | |
| 86 * when a result is returned from a sent command, it is also appended | |
| 87 * to the comm property. | |
| 88 * | |
| 89 * Each command and each result takes the form of ASCII text. For a | |
| 90 * command, the text consists of a nul character followed by several | |
| 39 | 91 * nul-terminated ASCII strings. The first string consists of a |
| 92 * single letter: | |
| 93 * "c" for an expression | |
| 94 * "k" for keystrokes | |
| 95 * "r" for reply | |
| 96 * "n" for notification. | |
| 97 * Subsequent strings have the form "option value" where the following options | |
| 98 * are supported: | |
| 7 | 99 * |
| 100 * -r commWindow serial | |
| 101 * | |
| 102 * This option means that a response should be sent to the window | |
| 103 * whose X identifier is "commWindow" (in hex), and the response should | |
| 104 * be identified with the serial number given by "serial" (in decimal). | |
| 105 * If this option isn't specified then the send is asynchronous and | |
| 106 * no response is sent. | |
| 107 * | |
| 108 * -n name | |
| 109 * "Name" gives the name of the application for which the command is | |
| 110 * intended. This option must be present. | |
| 111 * | |
| 39 | 112 * -E encoding |
| 113 * Encoding name used for the text. This is the 'encoding' of the | |
| 114 * sender. The receiver may want to do conversion to his 'encoding'. | |
| 115 * | |
| 7 | 116 * -s script |
| 117 * "Script" is the script to be executed. This option must be | |
| 118 * present. Taken as a series of keystrokes in a "k" command where | |
| 119 * <Key>'s are expanded | |
| 120 * | |
| 121 * The options may appear in any order. The -n and -s options must be | |
| 122 * present, but -r may be omitted for asynchronous RPCs. For compatibility | |
| 123 * with future releases that may add new features, there may be additional | |
| 124 * options present; as long as they start with a "-" character, they will | |
| 125 * be ignored. | |
| 126 * | |
| 127 * A result also consists of a zero character followed by several null- | |
| 128 * terminated ASCII strings. The first string consists of the single | |
| 129 * letter "r". Subsequent strings have the form "option value" where | |
| 130 * the following options are supported: | |
| 131 * | |
| 132 * -s serial | |
| 133 * Identifies the command for which this is the result. It is the | |
| 134 * same as the "serial" field from the -s option in the command. This | |
| 135 * option must be present. | |
| 136 * | |
| 137 * -r result | |
| 138 * "Result" is the result string for the script, which may be either | |
| 139 * a result or an error message. If this field is omitted then it | |
| 140 * defaults to an empty string. | |
| 141 * | |
| 142 * -c code | |
| 143 * 0: for OK. This is the default. | |
| 144 * 1: for error: Result is the last error | |
| 145 * | |
| 146 * -i errorInfo | |
| 147 * -e errorCode | |
| 148 * Not applicable for Vim | |
| 149 * | |
| 150 * Options may appear in any order, and only the -s option must be | |
| 151 * present. As with commands, there may be additional options besides | |
| 152 * these; unknown options are ignored. | |
| 153 */ | |
| 154 | |
| 155 /* | |
| 156 * Maximum size property that can be read at one time by | |
| 157 * this module: | |
| 158 */ | |
| 159 | |
| 160 #define MAX_PROP_WORDS 100000 | |
| 161 | |
| 162 struct ServerReply | |
| 163 { | |
| 164 Window id; | |
| 165 garray_T strings; | |
| 166 }; | |
| 167 static garray_T serverReply = { 0, 0, 0, 0, 0 }; | |
| 168 enum ServerReplyOp { SROP_Find, SROP_Add, SROP_Delete }; | |
| 169 | |
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170 typedef int (*EndCond)(void *); |
| 7 | 171 |
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172 struct x_cmdqueue |
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173 { |
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174 char_u *propInfo; |
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175 long_u len; |
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176 struct x_cmdqueue *next; |
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177 struct x_cmdqueue *prev; |
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178 }; |
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179 |
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180 typedef struct x_cmdqueue x_queue_T; |
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181 |
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182 /* dummy node, header for circular queue */ |
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183 static x_queue_T head = {NULL, 0, NULL, NULL}; |
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184 |
| 7 | 185 /* |
| 186 * Forward declarations for procedures defined later in this file: | |
| 187 */ | |
| 188 | |
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189 static Window LookupName(Display *dpy, char_u *name, int delete, char_u **loose); |
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190 static int SendInit(Display *dpy); |
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191 static int DoRegisterName(Display *dpy, char_u *name); |
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192 static void DeleteAnyLingerer(Display *dpy, Window w); |
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193 static int GetRegProp(Display *dpy, char_u **regPropp, long_u *numItemsp, int domsg); |
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194 static int WaitForPend(void *p); |
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195 static int WindowValid(Display *dpy, Window w); |
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196 static void ServerWait(Display *dpy, Window w, EndCond endCond, void *endData, int localLoop, int seconds); |
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197 static int AppendPropCarefully(Display *display, Window window, Atom property, char_u *value, int length); |
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198 static int x_error_check(Display *dpy, XErrorEvent *error_event); |
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199 static int IsSerialName(char_u *name); |
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200 static void save_in_queue(char_u *buf, long_u len); |
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201 static void server_parse_message(Display *dpy, char_u *propInfo, long_u numItems); |
| 7 | 202 |
| 203 /* Private variables for the "server" functionality */ | |
| 204 static Atom registryProperty = None; | |
| 205 static Atom vimProperty = None; | |
| 206 static int got_x_error = FALSE; | |
| 207 | |
| 208 static char_u *empty_prop = (char_u *)""; /* empty GetRegProp() result */ | |
| 209 | |
| 210 /* | |
| 211 * Associate an ASCII name with Vim. Try real hard to get a unique one. | |
| 212 * Returns FAIL or OK. | |
| 213 */ | |
| 214 int | |
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215 serverRegisterName( |
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216 Display *dpy, /* display to register with */ |
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217 char_u *name) /* the name that will be used as a base */ |
| 7 | 218 { |
| 219 int i; | |
| 220 int res; | |
| 221 char_u *p = NULL; | |
| 222 | |
| 223 res = DoRegisterName(dpy, name); | |
| 224 if (res < 0) | |
| 225 { | |
| 226 i = 1; | |
| 227 do | |
| 228 { | |
| 229 if (res < -1 || i >= 1000) | |
| 230 { | |
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231 msg_attr(_("Unable to register a command server name"), |
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232 HL_ATTR(HLF_W)); |
| 7 | 233 return FAIL; |
| 234 } | |
| 235 if (p == NULL) | |
| 236 p = alloc(STRLEN(name) + 10); | |
| 237 if (p == NULL) | |
| 238 { | |
| 239 res = -10; | |
| 240 continue; | |
| 241 } | |
| 242 sprintf((char *)p, "%s%d", name, i++); | |
| 243 res = DoRegisterName(dpy, p); | |
| 244 } | |
| 245 while (res < 0) | |
| 246 ; | |
| 247 vim_free(p); | |
| 248 } | |
| 249 return OK; | |
| 250 } | |
| 251 | |
| 252 static int | |
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253 DoRegisterName(Display *dpy, char_u *name) |
| 7 | 254 { |
| 255 Window w; | |
| 256 XErrorHandler old_handler; | |
| 257 #define MAX_NAME_LENGTH 100 | |
| 258 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 259 | |
| 260 if (commProperty == None) | |
| 261 { | |
| 262 if (SendInit(dpy) < 0) | |
| 263 return -2; | |
| 264 } | |
| 265 | |
| 266 /* | |
| 267 * Make sure the name is unique, and append info about it to | |
| 268 * the registry property. It's important to lock the server | |
| 269 * here to prevent conflicting changes to the registry property. | |
| 270 * WARNING: Do not step through this while debugging, it will hangup the X | |
| 271 * server! | |
| 272 */ | |
| 273 XGrabServer(dpy); | |
| 274 w = LookupName(dpy, name, FALSE, NULL); | |
| 275 if (w != (Window)0) | |
| 276 { | |
| 277 Status status; | |
| 278 int dummyInt; | |
| 279 unsigned int dummyUns; | |
| 280 Window dummyWin; | |
| 281 | |
| 282 /* | |
| 283 * The name is currently registered. See if the commWindow | |
| 284 * associated with the name exists. If not, or if the commWindow | |
| 285 * is *our* commWindow, then just unregister the old name (this | |
| 286 * could happen if an application dies without cleaning up the | |
| 287 * registry). | |
| 288 */ | |
| 289 old_handler = XSetErrorHandler(x_error_check); | |
| 290 status = XGetGeometry(dpy, w, &dummyWin, &dummyInt, &dummyInt, | |
| 291 &dummyUns, &dummyUns, &dummyUns, &dummyUns); | |
| 292 (void)XSetErrorHandler(old_handler); | |
| 293 if (status != Success && w != commWindow) | |
| 294 { | |
| 295 XUngrabServer(dpy); | |
| 296 XFlush(dpy); | |
| 297 return -1; | |
| 298 } | |
| 299 (void)LookupName(dpy, name, /*delete=*/TRUE, NULL); | |
| 300 } | |
| 301 sprintf((char *)propInfo, "%x %.*s", (int_u)commWindow, | |
| 302 MAX_NAME_LENGTH, name); | |
| 303 old_handler = XSetErrorHandler(x_error_check); | |
| 304 got_x_error = FALSE; | |
| 305 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 306 PropModeAppend, propInfo, STRLEN(propInfo) + 1); | |
| 307 XUngrabServer(dpy); | |
| 308 XSync(dpy, False); | |
| 309 (void)XSetErrorHandler(old_handler); | |
| 310 | |
| 311 if (!got_x_error) | |
| 312 { | |
| 313 #ifdef FEAT_EVAL | |
| 314 set_vim_var_string(VV_SEND_SERVER, name, -1); | |
| 315 #endif | |
| 316 serverName = vim_strsave(name); | |
| 317 #ifdef FEAT_TITLE | |
| 318 need_maketitle = TRUE; | |
| 319 #endif | |
| 320 return 0; | |
| 321 } | |
| 322 return -2; | |
| 323 } | |
| 324 | |
| 325 #if defined(FEAT_GUI) || defined(PROTO) | |
| 326 /* | |
| 327 * Clean out new ID from registry and set it as comm win. | |
| 328 * Change any registered window ID. | |
| 329 */ | |
| 330 void | |
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331 serverChangeRegisteredWindow( |
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332 Display *dpy, /* Display to register with */ |
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333 Window newwin) /* Re-register to this ID */ |
| 7 | 334 { |
| 335 char_u propInfo[MAX_NAME_LENGTH + 20]; | |
| 336 | |
| 337 commWindow = newwin; | |
| 338 | |
| 339 /* Always call SendInit() here, to make sure commWindow is marked as a Vim | |
| 340 * window. */ | |
| 341 if (SendInit(dpy) < 0) | |
| 342 return; | |
| 343 | |
| 344 /* WARNING: Do not step through this while debugging, it will hangup the X | |
| 345 * server! */ | |
| 346 XGrabServer(dpy); | |
| 347 DeleteAnyLingerer(dpy, newwin); | |
| 348 if (serverName != NULL) | |
| 349 { | |
| 350 /* Reinsert name if we was already registered */ | |
| 351 (void)LookupName(dpy, serverName, /*delete=*/TRUE, NULL); | |
| 352 sprintf((char *)propInfo, "%x %.*s", | |
| 353 (int_u)newwin, MAX_NAME_LENGTH, serverName); | |
| 354 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, 8, | |
| 355 PropModeAppend, (char_u *)propInfo, | |
| 356 STRLEN(propInfo) + 1); | |
| 357 } | |
| 358 XUngrabServer(dpy); | |
| 359 } | |
| 360 #endif | |
| 361 | |
| 362 /* | |
| 363 * Send to an instance of Vim via the X display. | |
| 364 * Returns 0 for OK, negative for an error. | |
| 365 */ | |
| 366 int | |
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367 serverSendToVim( |
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368 Display *dpy, /* Where to send. */ |
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369 char_u *name, /* Where to send. */ |
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370 char_u *cmd, /* What to send. */ |
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371 char_u **result, /* Result of eval'ed expression */ |
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372 Window *server, /* Actual ID of receiving app */ |
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373 Bool asExpr, /* Interpret as keystrokes or expr ? */ |
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374 int timeout, /* seconds to wait or zero */ |
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375 Bool localLoop, /* Throw away everything but result */ |
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376 int silent) /* don't complain about no server */ |
| 7 | 377 { |
| 378 Window w; | |
| 379 char_u *property; | |
| 380 int length; | |
| 381 int res; | |
| 382 static int serial = 0; /* Running count of sent commands. | |
| 383 * Used to give each command a | |
| 384 * different serial number. */ | |
| 385 PendingCommand pending; | |
| 386 char_u *loosename = NULL; | |
| 387 | |
| 388 if (result != NULL) | |
| 389 *result = NULL; | |
| 390 if (name == NULL || *name == NUL) | |
| 391 name = (char_u *)"GVIM"; /* use a default name */ | |
| 392 | |
| 393 if (commProperty == None && dpy != NULL) | |
| 394 { | |
| 395 if (SendInit(dpy) < 0) | |
| 396 return -1; | |
| 397 } | |
| 398 | |
| 399 /* Execute locally if no display or target is ourselves */ | |
| 400 if (dpy == NULL || (serverName != NULL && STRICMP(name, serverName) == 0)) | |
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401 return sendToLocalVim(cmd, asExpr, result); |
| 7 | 402 |
| 403 /* | |
| 404 * Bind the server name to a communication window. | |
| 405 * | |
| 406 * Find any survivor with a serialno attached to the name if the | |
| 407 * original registrant of the wanted name is no longer present. | |
| 408 * | |
| 409 * Delete any lingering names from dead editors. | |
| 410 */ | |
| 411 while (TRUE) | |
| 412 { | |
| 413 w = LookupName(dpy, name, FALSE, &loosename); | |
| 414 /* Check that the window is hot */ | |
| 415 if (w != None) | |
| 416 { | |
| 417 if (!WindowValid(dpy, w)) | |
| 418 { | |
| 419 LookupName(dpy, loosename ? loosename : name, | |
| 420 /*DELETE=*/TRUE, NULL); | |
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421 vim_free(loosename); |
| 7 | 422 continue; |
| 423 } | |
| 424 } | |
| 425 break; | |
| 426 } | |
| 427 if (w == None) | |
| 428 { | |
| 429 if (!silent) | |
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430 semsg(_(e_noserver), name); |
| 7 | 431 return -1; |
| 432 } | |
| 433 else if (loosename != NULL) | |
| 434 name = loosename; | |
| 435 if (server != NULL) | |
| 436 *server = w; | |
| 437 | |
| 438 /* | |
| 439 * Send the command to target interpreter by appending it to the | |
| 440 * comm window in the communication window. | |
| 500 | 441 * Length must be computed exactly! |
| 7 | 442 */ |
| 500 | 443 length = STRLEN(name) + STRLEN(p_enc) + STRLEN(cmd) + 14; |
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444 property = (char_u *)alloc(length + 30); |
| 7 | 445 |
| 39 | 446 sprintf((char *)property, "%c%c%c-n %s%c-E %s%c-s %s", |
| 447 0, asExpr ? 'c' : 'k', 0, name, 0, p_enc, 0, cmd); | |
| 7 | 448 if (name == loosename) |
| 449 vim_free(loosename); | |
| 450 /* Add a back reference to our comm window */ | |
| 451 serial++; | |
| 452 sprintf((char *)property + length, "%c-r %x %d", | |
| 453 0, (int_u)commWindow, serial); | |
| 500 | 454 /* Add length of what "-r %x %d" resulted in, skipping the NUL. */ |
| 7 | 455 length += STRLEN(property + length + 1) + 1; |
| 456 | |
| 457 res = AppendPropCarefully(dpy, w, commProperty, property, length + 1); | |
| 458 vim_free(property); | |
| 459 if (res < 0) | |
| 460 { | |
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461 emsg(_("E248: Failed to send command to the destination program")); |
| 7 | 462 return -1; |
| 463 } | |
| 464 | |
| 465 if (!asExpr) /* There is no answer for this - Keys are sent async */ | |
| 466 return 0; | |
| 467 | |
| 468 /* | |
| 469 * Register the fact that we're waiting for a command to | |
| 470 * complete (this is needed by SendEventProc and by | |
| 471 * AppendErrorProc to pass back the command's results). | |
| 472 */ | |
| 473 pending.serial = serial; | |
| 474 pending.code = 0; | |
| 475 pending.result = NULL; | |
| 476 pending.nextPtr = pendingCommands; | |
| 477 pendingCommands = &pending; | |
| 478 | |
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479 ServerWait(dpy, w, WaitForPend, &pending, localLoop, |
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480 timeout > 0 ? timeout : 600); |
| 7 | 481 |
| 482 /* | |
| 483 * Unregister the information about the pending command | |
| 484 * and return the result. | |
| 485 */ | |
| 486 if (pendingCommands == &pending) | |
| 487 pendingCommands = pending.nextPtr; | |
| 488 else | |
| 489 { | |
| 490 PendingCommand *pcPtr; | |
| 491 | |
| 492 for (pcPtr = pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) | |
| 493 if (pcPtr->nextPtr == &pending) | |
| 494 { | |
| 495 pcPtr->nextPtr = pending.nextPtr; | |
| 496 break; | |
| 497 } | |
| 498 } | |
| 499 if (result != NULL) | |
| 500 *result = pending.result; | |
| 501 else | |
| 502 vim_free(pending.result); | |
| 503 | |
| 504 return pending.code == 0 ? 0 : -1; | |
| 505 } | |
| 506 | |
| 507 static int | |
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508 WaitForPend(void *p) |
| 7 | 509 { |
| 510 PendingCommand *pending = (PendingCommand *) p; | |
| 511 return pending->result != NULL; | |
| 512 } | |
| 513 | |
| 514 /* | |
| 515 * Return TRUE if window "w" exists and has a "Vim" property on it. | |
| 516 */ | |
| 517 static int | |
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518 WindowValid(Display *dpy, Window w) |
| 7 | 519 { |
| 520 XErrorHandler old_handler; | |
| 521 Atom *plist; | |
| 522 int numProp; | |
| 523 int i; | |
| 524 | |
| 525 old_handler = XSetErrorHandler(x_error_check); | |
| 526 got_x_error = 0; | |
| 527 plist = XListProperties(dpy, w, &numProp); | |
| 528 XSync(dpy, False); | |
| 529 XSetErrorHandler(old_handler); | |
| 530 if (plist == NULL || got_x_error) | |
| 531 return FALSE; | |
| 532 | |
| 533 for (i = 0; i < numProp; i++) | |
| 534 if (plist[i] == vimProperty) | |
| 535 { | |
| 536 XFree(plist); | |
| 537 return TRUE; | |
| 538 } | |
| 539 XFree(plist); | |
| 540 return FALSE; | |
| 541 } | |
| 542 | |
| 543 /* | |
| 544 * Enter a loop processing X events & polling chars until we see a result | |
| 545 */ | |
| 546 static void | |
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547 ServerWait( |
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548 Display *dpy, |
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549 Window w, |
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550 EndCond endCond, |
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551 void *endData, |
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552 int localLoop, |
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553 int seconds) |
| 7 | 554 { |
| 555 time_t start; | |
| 556 time_t now; | |
| 557 XEvent event; | |
| 3670 | 558 |
| 559 #define UI_MSEC_DELAY 50 | |
| 560 #define SEND_MSEC_POLL 500 | |
| 561 #ifndef HAVE_SELECT | |
| 562 struct pollfd fds; | |
| 563 | |
| 564 fds.fd = ConnectionNumber(dpy); | |
| 565 fds.events = POLLIN; | |
| 566 #else | |
| 567 fd_set fds; | |
| 568 struct timeval tv; | |
| 569 | |
| 570 tv.tv_sec = 0; | |
| 571 tv.tv_usec = SEND_MSEC_POLL * 1000; | |
| 572 FD_ZERO(&fds); | |
| 573 FD_SET(ConnectionNumber(dpy), &fds); | |
| 574 #endif | |
| 7 | 575 |
| 576 time(&start); | |
| 3670 | 577 while (TRUE) |
| 7 | 578 { |
| 3670 | 579 while (XCheckWindowEvent(dpy, commWindow, PropertyChangeMask, &event)) |
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580 serverEventProc(dpy, &event, 1); |
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581 server_parse_messages(); |
| 3670 | 582 |
| 583 if (endCond(endData) != 0) | |
| 584 break; | |
| 585 if (!WindowValid(dpy, w)) | |
| 586 break; | |
| 7 | 587 time(&now); |
| 588 if (seconds >= 0 && (now - start) >= seconds) | |
| 589 break; | |
| 3670 | 590 |
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591 #ifdef FEAT_TIMERS |
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592 check_due_timer(); |
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593 #endif |
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594 |
| 3670 | 595 /* Just look out for the answer without calling back into Vim */ |
| 7 | 596 if (localLoop) |
| 597 { | |
| 598 #ifndef HAVE_SELECT | |
| 599 if (poll(&fds, 1, SEND_MSEC_POLL) < 0) | |
| 600 break; | |
| 601 #else | |
| 3670 | 602 if (select(FD_SETSIZE, &fds, NULL, NULL, &tv) < 0) |
| 7 | 603 break; |
| 604 #endif | |
| 605 } | |
| 606 else | |
| 607 { | |
| 608 if (got_int) | |
| 609 break; | |
| 3670 | 610 ui_delay((long)UI_MSEC_DELAY, TRUE); |
| 7 | 611 ui_breakcheck(); |
| 612 } | |
| 613 } | |
| 614 } | |
| 615 | |
| 616 | |
| 617 /* | |
| 618 * Fetch a list of all the Vim instance names currently registered for the | |
| 619 * display. | |
| 620 * | |
| 621 * Returns a newline separated list in allocated memory or NULL. | |
| 622 */ | |
| 623 char_u * | |
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624 serverGetVimNames(Display *dpy) |
| 7 | 625 { |
| 626 char_u *regProp; | |
| 627 char_u *entry; | |
| 628 char_u *p; | |
| 629 long_u numItems; | |
| 630 int_u w; | |
| 631 garray_T ga; | |
| 632 | |
| 633 if (registryProperty == None) | |
| 634 { | |
| 635 if (SendInit(dpy) < 0) | |
| 636 return NULL; | |
| 637 } | |
| 638 | |
| 639 /* | |
| 640 * Read the registry property. | |
| 641 */ | |
| 642 if (GetRegProp(dpy, ®Prop, &numItems, TRUE) == FAIL) | |
| 643 return NULL; | |
| 644 | |
| 645 /* | |
| 646 * Scan all of the names out of the property. | |
| 647 */ | |
| 648 ga_init2(&ga, 1, 100); | |
| 1880 | 649 for (p = regProp; (long_u)(p - regProp) < numItems; p++) |
| 7 | 650 { |
| 651 entry = p; | |
| 652 while (*p != 0 && !isspace(*p)) | |
| 653 p++; | |
| 654 if (*p != 0) | |
| 655 { | |
| 656 w = None; | |
| 657 sscanf((char *)entry, "%x", &w); | |
| 658 if (WindowValid(dpy, (Window)w)) | |
| 659 { | |
| 660 ga_concat(&ga, p + 1); | |
| 661 ga_concat(&ga, (char_u *)"\n"); | |
| 662 } | |
| 663 while (*p != 0) | |
| 664 p++; | |
| 665 } | |
| 666 } | |
| 667 if (regProp != empty_prop) | |
| 668 XFree(regProp); | |
| 21 | 669 ga_append(&ga, NUL); |
| 7 | 670 return ga.ga_data; |
| 671 } | |
| 672 | |
| 673 /* ---------------------------------------------------------- | |
| 674 * Reply stuff | |
| 675 */ | |
| 676 | |
| 677 static struct ServerReply * | |
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678 ServerReplyFind(Window w, enum ServerReplyOp op) |
| 7 | 679 { |
| 680 struct ServerReply *p; | |
| 681 struct ServerReply e; | |
| 682 int i; | |
| 683 | |
| 684 p = (struct ServerReply *) serverReply.ga_data; | |
| 685 for (i = 0; i < serverReply.ga_len; i++, p++) | |
| 686 if (p->id == w) | |
| 687 break; | |
| 688 if (i >= serverReply.ga_len) | |
| 689 p = NULL; | |
| 690 | |
| 691 if (p == NULL && op == SROP_Add) | |
| 692 { | |
| 693 if (serverReply.ga_growsize == 0) | |
| 694 ga_init2(&serverReply, sizeof(struct ServerReply), 1); | |
| 695 if (ga_grow(&serverReply, 1) == OK) | |
| 696 { | |
| 697 p = ((struct ServerReply *) serverReply.ga_data) | |
| 698 + serverReply.ga_len; | |
| 699 e.id = w; | |
| 700 ga_init2(&e.strings, 1, 100); | |
| 1740 | 701 mch_memmove(p, &e, sizeof(e)); |
| 7 | 702 serverReply.ga_len++; |
| 703 } | |
| 704 } | |
| 705 else if (p != NULL && op == SROP_Delete) | |
| 706 { | |
| 707 ga_clear(&p->strings); | |
| 708 mch_memmove(p, p + 1, (serverReply.ga_len - i - 1) * sizeof(*p)); | |
| 709 serverReply.ga_len--; | |
| 710 } | |
| 711 | |
| 712 return p; | |
| 713 } | |
| 714 | |
| 715 /* | |
| 716 * Convert string to windowid. | |
| 717 * Issue an error if the id is invalid. | |
| 718 */ | |
| 719 Window | |
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720 serverStrToWin(char_u *str) |
| 7 | 721 { |
| 722 unsigned id = None; | |
| 723 | |
| 724 sscanf((char *)str, "0x%x", &id); | |
| 725 if (id == None) | |
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726 semsg(_("E573: Invalid server id used: %s"), str); |
| 7 | 727 |
| 728 return (Window)id; | |
| 729 } | |
| 730 | |
| 731 /* | |
| 39 | 732 * Send a reply string (notification) to client with id "name". |
| 7 | 733 * Return -1 if the window is invalid. |
| 734 */ | |
| 735 int | |
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736 serverSendReply(char_u *name, char_u *str) |
| 7 | 737 { |
| 738 char_u *property; | |
| 739 int length; | |
| 740 int res; | |
| 741 Display *dpy = X_DISPLAY; | |
| 742 Window win = serverStrToWin(name); | |
| 743 | |
| 744 if (commProperty == None) | |
| 745 { | |
| 746 if (SendInit(dpy) < 0) | |
| 747 return -2; | |
| 748 } | |
| 749 if (!WindowValid(dpy, win)) | |
| 750 return -1; | |
| 751 | |
| 500 | 752 length = STRLEN(p_enc) + STRLEN(str) + 14; |
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753 if ((property = (char_u *)alloc(length + 30)) != NULL) |
| 7 | 754 { |
| 39 | 755 sprintf((char *)property, "%cn%c-E %s%c-n %s%c-w %x", |
| 756 0, 0, p_enc, 0, str, 0, (unsigned int)commWindow); | |
| 500 | 757 /* Add length of what "%x" resulted in. */ |
| 7 | 758 length += STRLEN(property + length); |
| 759 res = AppendPropCarefully(dpy, win, commProperty, property, length + 1); | |
| 760 vim_free(property); | |
| 761 return res; | |
| 762 } | |
| 763 return -1; | |
| 764 } | |
| 765 | |
| 766 static int | |
|
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767 WaitForReply(void *p) |
| 7 | 768 { |
| 769 Window *w = (Window *) p; | |
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770 |
| 7 | 771 return ServerReplyFind(*w, SROP_Find) != NULL; |
| 772 } | |
| 773 | |
| 774 /* | |
| 775 * Wait for replies from id (win) | |
|
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776 * When "timeout" is non-zero wait up to this many seconds. |
| 7 | 777 * Return 0 and the malloc'ed string when a reply is available. |
| 778 * Return -1 if the window becomes invalid while waiting. | |
| 779 */ | |
| 780 int | |
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781 serverReadReply( |
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782 Display *dpy, |
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783 Window win, |
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784 char_u **str, |
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785 int localLoop, |
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786 int timeout) |
| 7 | 787 { |
| 788 int len; | |
| 789 char_u *s; | |
| 790 struct ServerReply *p; | |
| 791 | |
|
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792 ServerWait(dpy, win, WaitForReply, &win, localLoop, |
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793 timeout > 0 ? timeout : -1); |
| 7 | 794 |
| 795 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 796 { | |
| 797 *str = vim_strsave(p->strings.ga_data); | |
| 798 len = STRLEN(*str) + 1; | |
| 799 if (len < p->strings.ga_len) | |
| 800 { | |
| 801 s = (char_u *) p->strings.ga_data; | |
| 802 mch_memmove(s, s + len, p->strings.ga_len - len); | |
| 803 p->strings.ga_len -= len; | |
| 804 } | |
| 805 else | |
| 806 { | |
| 807 /* Last string read. Remove from list */ | |
| 808 ga_clear(&p->strings); | |
| 809 ServerReplyFind(win, SROP_Delete); | |
| 810 } | |
| 811 return 0; | |
| 812 } | |
| 813 return -1; | |
| 814 } | |
| 815 | |
| 816 /* | |
| 817 * Check for replies from id (win). | |
| 818 * Return TRUE and a non-malloc'ed string if there is. Else return FALSE. | |
| 819 */ | |
| 820 int | |
|
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821 serverPeekReply(Display *dpy, Window win, char_u **str) |
| 7 | 822 { |
| 823 struct ServerReply *p; | |
| 824 | |
| 825 if ((p = ServerReplyFind(win, SROP_Find)) != NULL && p->strings.ga_len > 0) | |
| 826 { | |
| 827 if (str != NULL) | |
| 828 *str = p->strings.ga_data; | |
| 829 return 1; | |
| 830 } | |
| 831 if (!WindowValid(dpy, win)) | |
| 832 return -1; | |
| 833 return 0; | |
| 834 } | |
| 835 | |
| 836 | |
| 837 /* | |
| 838 * Initialize the communication channels for sending commands and receiving | |
| 839 * results. | |
| 840 */ | |
| 841 static int | |
|
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842 SendInit(Display *dpy) |
| 7 | 843 { |
| 844 XErrorHandler old_handler; | |
| 845 | |
| 846 /* | |
| 847 * Create the window used for communication, and set up an | |
| 848 * event handler for it. | |
| 849 */ | |
| 850 old_handler = XSetErrorHandler(x_error_check); | |
| 851 got_x_error = FALSE; | |
| 852 | |
| 853 if (commProperty == None) | |
| 854 commProperty = XInternAtom(dpy, "Comm", False); | |
| 855 if (vimProperty == None) | |
| 856 vimProperty = XInternAtom(dpy, "Vim", False); | |
| 857 if (registryProperty == None) | |
| 858 registryProperty = XInternAtom(dpy, "VimRegistry", False); | |
| 859 | |
| 860 if (commWindow == None) | |
| 861 { | |
| 862 commWindow = XCreateSimpleWindow(dpy, XDefaultRootWindow(dpy), | |
| 863 getpid(), 0, 10, 10, 0, | |
| 864 WhitePixel(dpy, DefaultScreen(dpy)), | |
| 865 WhitePixel(dpy, DefaultScreen(dpy))); | |
| 866 XSelectInput(dpy, commWindow, PropertyChangeMask); | |
| 867 /* WARNING: Do not step through this while debugging, it will hangup | |
| 868 * the X server! */ | |
| 869 XGrabServer(dpy); | |
| 870 DeleteAnyLingerer(dpy, commWindow); | |
| 871 XUngrabServer(dpy); | |
| 872 } | |
| 873 | |
| 874 /* Make window recognizable as a vim window */ | |
| 875 XChangeProperty(dpy, commWindow, vimProperty, XA_STRING, | |
| 876 8, PropModeReplace, (char_u *)VIM_VERSION_SHORT, | |
| 877 (int)STRLEN(VIM_VERSION_SHORT) + 1); | |
| 878 | |
| 879 XSync(dpy, False); | |
| 880 (void)XSetErrorHandler(old_handler); | |
| 881 | |
| 882 return got_x_error ? -1 : 0; | |
| 883 } | |
| 884 | |
| 885 /* | |
| 886 * Given a server name, see if the name exists in the registry for a | |
| 887 * particular display. | |
| 888 * | |
| 889 * If the given name is registered, return the ID of the window associated | |
| 890 * with the name. If the name isn't registered, then return 0. | |
| 891 * | |
| 892 * Side effects: | |
| 893 * If the registry property is improperly formed, then it is deleted. | |
| 894 * If "delete" is non-zero, then if the named server is found it is | |
| 895 * removed from the registry property. | |
| 896 */ | |
| 897 static Window | |
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898 LookupName( |
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899 Display *dpy, /* Display whose registry to check. */ |
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900 char_u *name, /* Name of a server. */ |
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901 int delete, /* If non-zero, delete info about name. */ |
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902 char_u **loose) /* Do another search matching -999 if not found |
| 7 | 903 Return result here if a match is found */ |
| 904 { | |
| 905 char_u *regProp, *entry; | |
| 906 char_u *p; | |
| 907 long_u numItems; | |
| 908 int_u returnValue; | |
| 909 | |
| 910 /* | |
| 911 * Read the registry property. | |
| 912 */ | |
| 913 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 914 return 0; | |
| 915 | |
| 916 /* | |
| 917 * Scan the property for the desired name. | |
| 918 */ | |
| 919 returnValue = (int_u)None; | |
| 920 entry = NULL; /* Not needed, but eliminates compiler warning. */ | |
| 1880 | 921 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 922 { |
| 923 entry = p; | |
| 924 while (*p != 0 && !isspace(*p)) | |
| 925 p++; | |
| 926 if (*p != 0 && STRICMP(name, p + 1) == 0) | |
| 927 { | |
| 928 sscanf((char *)entry, "%x", &returnValue); | |
| 929 break; | |
| 930 } | |
| 931 while (*p != 0) | |
| 932 p++; | |
| 933 p++; | |
| 934 } | |
| 935 | |
| 936 if (loose != NULL && returnValue == (int_u)None && !IsSerialName(name)) | |
| 937 { | |
| 1880 | 938 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 939 { |
| 940 entry = p; | |
| 941 while (*p != 0 && !isspace(*p)) | |
| 942 p++; | |
| 943 if (*p != 0 && IsSerialName(p + 1) | |
| 944 && STRNICMP(name, p + 1, STRLEN(name)) == 0) | |
| 945 { | |
| 946 sscanf((char *)entry, "%x", &returnValue); | |
| 947 *loose = vim_strsave(p + 1); | |
| 948 break; | |
| 949 } | |
| 950 while (*p != 0) | |
| 951 p++; | |
| 952 p++; | |
| 953 } | |
| 954 } | |
| 955 | |
| 956 /* | |
| 957 * Delete the property, if that is desired (copy down the | |
| 958 * remainder of the registry property to overlay the deleted | |
| 959 * info, then rewrite the property). | |
| 960 */ | |
| 961 if (delete && returnValue != (int_u)None) | |
| 962 { | |
| 963 int count; | |
| 964 | |
| 965 while (*p != 0) | |
| 966 p++; | |
| 967 p++; | |
| 968 count = numItems - (p - regProp); | |
| 969 if (count > 0) | |
| 1740 | 970 mch_memmove(entry, p, count); |
| 7 | 971 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, XA_STRING, |
| 972 8, PropModeReplace, regProp, | |
| 973 (int)(numItems - (p - entry))); | |
| 974 XSync(dpy, False); | |
| 975 } | |
| 976 | |
| 977 if (regProp != empty_prop) | |
| 978 XFree(regProp); | |
| 979 return (Window)returnValue; | |
| 980 } | |
| 981 | |
| 982 /* | |
| 1197 | 983 * Delete any lingering occurrence of window id. We promise that any |
| 984 * occurrence is not ours since it is not yet put into the registry (by us) | |
| 7 | 985 * |
| 986 * This is necessary in the following scenario: | |
| 987 * 1. There is an old windowid for an exit'ed vim in the registry | |
| 988 * 2. We get that id for our commWindow but only want to send, not register. | |
| 989 * 3. The window will mistakenly be regarded valid because of own commWindow | |
| 990 */ | |
| 991 static void | |
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992 DeleteAnyLingerer( |
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993 Display *dpy, /* Display whose registry to check. */ |
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994 Window win) /* Window to remove */ |
| 7 | 995 { |
| 996 char_u *regProp, *entry = NULL; | |
| 997 char_u *p; | |
| 998 long_u numItems; | |
| 28 | 999 int_u wwin; |
| 7 | 1000 |
| 1001 /* | |
| 1002 * Read the registry property. | |
| 1003 */ | |
| 1004 if (GetRegProp(dpy, ®Prop, &numItems, FALSE) == FAIL) | |
| 1005 return; | |
| 1006 | |
| 1007 /* Scan the property for the window id. */ | |
| 1880 | 1008 for (p = regProp; (long_u)(p - regProp) < numItems; ) |
| 7 | 1009 { |
| 1010 if (*p != 0) | |
| 1011 { | |
| 28 | 1012 sscanf((char *)p, "%x", &wwin); |
| 1013 if ((Window)wwin == win) | |
| 7 | 1014 { |
| 1015 int lastHalf; | |
| 1016 | |
| 1017 /* Copy down the remainder to delete entry */ | |
| 1018 entry = p; | |
| 1019 while (*p != 0) | |
| 1020 p++; | |
| 1021 p++; | |
| 1022 lastHalf = numItems - (p - regProp); | |
| 1023 if (lastHalf > 0) | |
| 1740 | 1024 mch_memmove(entry, p, lastHalf); |
| 7 | 1025 numItems = (entry - regProp) + lastHalf; |
| 1026 p = entry; | |
| 1027 continue; | |
| 1028 } | |
| 1029 } | |
| 1030 while (*p != 0) | |
| 1031 p++; | |
| 1032 p++; | |
| 1033 } | |
| 1034 | |
| 1035 if (entry != NULL) | |
| 1036 { | |
| 1037 XChangeProperty(dpy, RootWindow(dpy, 0), registryProperty, | |
| 1038 XA_STRING, 8, PropModeReplace, regProp, | |
| 1039 (int)(p - regProp)); | |
| 1040 XSync(dpy, False); | |
| 1041 } | |
| 1042 | |
| 1043 if (regProp != empty_prop) | |
| 1044 XFree(regProp); | |
| 1045 } | |
| 1046 | |
| 1047 /* | |
| 1048 * Read the registry property. Delete it when it's formatted wrong. | |
| 1049 * Return the property in "regPropp". "empty_prop" is used when it doesn't | |
| 1050 * exist yet. | |
| 1051 * Return OK when successful. | |
| 1052 */ | |
| 1053 static int | |
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1054 GetRegProp( |
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1055 Display *dpy, |
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1056 char_u **regPropp, |
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1057 long_u *numItemsp, |
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1058 int domsg) /* When TRUE give error message. */ |
| 7 | 1059 { |
| 1060 int result, actualFormat; | |
| 1061 long_u bytesAfter; | |
| 1062 Atom actualType; | |
| 819 | 1063 XErrorHandler old_handler; |
| 7 | 1064 |
| 1065 *regPropp = NULL; | |
| 819 | 1066 old_handler = XSetErrorHandler(x_error_check); |
| 1067 got_x_error = FALSE; | |
| 1068 | |
| 7 | 1069 result = XGetWindowProperty(dpy, RootWindow(dpy, 0), registryProperty, 0L, |
| 1070 (long)MAX_PROP_WORDS, False, | |
| 1071 XA_STRING, &actualType, | |
| 1072 &actualFormat, numItemsp, &bytesAfter, | |
| 1073 regPropp); | |
| 1074 | |
| 819 | 1075 XSync(dpy, FALSE); |
| 1076 (void)XSetErrorHandler(old_handler); | |
| 1077 if (got_x_error) | |
| 1078 return FAIL; | |
| 1079 | |
| 7 | 1080 if (actualType == None) |
| 1081 { | |
| 1082 /* No prop yet. Logically equal to the empty list */ | |
| 1083 *numItemsp = 0; | |
| 1084 *regPropp = empty_prop; | |
| 1085 return OK; | |
| 1086 } | |
| 1087 | |
| 1088 /* If the property is improperly formed, then delete it. */ | |
| 1089 if (result != Success || actualFormat != 8 || actualType != XA_STRING) | |
| 1090 { | |
| 1091 if (*regPropp != NULL) | |
| 1092 XFree(*regPropp); | |
| 1093 XDeleteProperty(dpy, RootWindow(dpy, 0), registryProperty); | |
| 1094 if (domsg) | |
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1095 emsg(_("E251: VIM instance registry property is badly formed. Deleted!")); |
| 7 | 1096 return FAIL; |
| 1097 } | |
| 1098 return OK; | |
| 1099 } | |
| 1100 | |
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1101 |
| 7 | 1102 /* |
| 1197 | 1103 * This procedure is invoked by the various X event loops throughout Vims when |
| 7 | 1104 * a property changes on the communication window. This procedure reads the |
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1105 * property and enqueues command requests and responses. If immediate is true, |
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1106 * it runs the event immediately instead of enqueuing it. Immediate can cause |
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1107 * unintended behavior and should only be used for code that blocks for a |
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1108 * response. |
| 7 | 1109 */ |
| 1110 void | |
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1111 serverEventProc( |
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1112 Display *dpy, |
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1113 XEvent *eventPtr, /* Information about event. */ |
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1114 int immediate) /* Run event immediately. Should mostly be 0. */ |
| 7 | 1115 { |
| 1116 char_u *propInfo; | |
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1117 int result, actualFormat; |
| 7 | 1118 long_u numItems, bytesAfter; |
| 1119 Atom actualType; | |
| 1120 | |
| 1121 if (eventPtr != NULL) | |
| 1122 { | |
| 1123 if (eventPtr->xproperty.atom != commProperty | |
| 1124 || eventPtr->xproperty.state != PropertyNewValue) | |
| 1125 return; | |
| 1126 } | |
| 1127 | |
| 1128 /* | |
| 1129 * Read the comm property and delete it. | |
| 1130 */ | |
| 1131 propInfo = NULL; | |
| 1132 result = XGetWindowProperty(dpy, commWindow, commProperty, 0L, | |
| 1133 (long)MAX_PROP_WORDS, True, | |
| 1134 XA_STRING, &actualType, | |
| 1135 &actualFormat, &numItems, &bytesAfter, | |
| 1136 &propInfo); | |
| 1137 | |
| 1138 /* If the property doesn't exist or is improperly formed then ignore it. */ | |
| 1139 if (result != Success || actualType != XA_STRING || actualFormat != 8) | |
| 1140 { | |
| 1141 if (propInfo != NULL) | |
| 1142 XFree(propInfo); | |
| 1143 return; | |
| 1144 } | |
|
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1145 if (immediate) |
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1146 server_parse_message(dpy, propInfo, numItems); |
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1147 else |
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1148 save_in_queue(propInfo, numItems); |
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1149 } |
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1150 |
|
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1151 /* |
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1152 * Saves x clientserver commands in a queue so that they can be called when |
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1153 * vim is idle. |
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1154 */ |
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1155 static void |
|
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1156 save_in_queue(char_u *propInfo, long_u len) |
|
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1157 { |
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1158 x_queue_T *node; |
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1159 |
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1160 node = (x_queue_T *)alloc(sizeof(x_queue_T)); |
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1161 if (node == NULL) |
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1162 return; /* out of memory */ |
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1163 node->propInfo = propInfo; |
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1164 node->len = len; |
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1165 |
|
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1166 if (head.next == NULL) /* initialize circular queue */ |
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1167 { |
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1168 head.next = &head; |
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1169 head.prev = &head; |
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1170 } |
|
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1171 |
|
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1172 /* insert node at tail of queue */ |
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1173 node->next = &head; |
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1174 node->prev = head.prev; |
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1175 head.prev->next = node; |
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1176 head.prev = node; |
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1177 } |
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1178 |
|
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1179 /* |
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1180 * Parses queued clientserver messages. |
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1181 */ |
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1182 void |
|
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1183 server_parse_messages(void) |
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1184 { |
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1185 x_queue_T *node; |
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1186 |
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1187 if (!X_DISPLAY) |
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1188 return; /* cannot happen? */ |
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1189 while (head.next != NULL && head.next != &head) |
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1190 { |
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1191 node = head.next; |
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1192 head.next = node->next; |
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1193 node->next->prev = node->prev; |
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1194 server_parse_message(X_DISPLAY, node->propInfo, node->len); |
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1195 vim_free(node); |
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1196 } |
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1197 } |
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1198 |
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1199 /* |
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1200 * Returns a non-zero value if there are clientserver messages waiting |
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1201 * int the queue. |
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1202 */ |
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1203 int |
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1204 server_waiting(void) |
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1205 { |
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1206 return head.next != NULL && head.next != &head; |
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1207 } |
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1208 |
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1209 /* |
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1210 * Prases a single clientserver message. A single message may contain multiple |
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1211 * commands. |
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1212 * "propInfo" will be freed. |
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1213 */ |
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1214 static void |
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1215 server_parse_message( |
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1216 Display *dpy, |
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1217 char_u *propInfo, /* A string containing 0 or more X commands */ |
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1218 long_u numItems) /* The size of propInfo in bytes. */ |
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1219 { |
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1220 char_u *p; |
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1221 int code; |
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1222 char_u *tofree; |
| 7 | 1223 |
| 1224 /* | |
| 1225 * Several commands and results could arrive in the property at | |
| 1226 * one time; each iteration through the outer loop handles a | |
| 1227 * single command or result. | |
| 1228 */ | |
| 1880 | 1229 for (p = propInfo; (long_u)(p - propInfo) < numItems; ) |
| 7 | 1230 { |
| 1231 /* | |
| 1232 * Ignore leading NULs; each command or result starts with a | |
| 1233 * NUL so that no matter how badly formed a preceding command | |
| 1234 * is, we'll be able to tell that a new command/result is | |
| 1235 * starting. | |
| 1236 */ | |
| 1237 if (*p == 0) | |
| 1238 { | |
| 1239 p++; | |
| 1240 continue; | |
| 1241 } | |
| 1242 | |
| 1243 if ((*p == 'c' || *p == 'k') && (p[1] == 0)) | |
| 1244 { | |
| 1245 Window resWindow; | |
| 3668 | 1246 char_u *name, *script, *serial, *end; |
| 7 | 1247 Bool asKeys = *p == 'k'; |
| 39 | 1248 char_u *enc; |
| 7 | 1249 |
| 1250 /* | |
| 1251 * This is an incoming command from some other application. | |
| 1252 * Iterate over all of its options. Stop when we reach | |
| 1253 * the end of the property or something that doesn't look | |
| 1254 * like an option. | |
| 1255 */ | |
| 1256 p += 2; | |
| 1257 name = NULL; | |
| 1258 resWindow = None; | |
| 1259 serial = (char_u *)""; | |
| 1260 script = NULL; | |
| 39 | 1261 enc = NULL; |
| 1880 | 1262 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1263 { |
| 1264 switch (p[1]) | |
| 1265 { | |
| 1266 case 'r': | |
| 1267 end = skipwhite(p + 2); | |
| 1268 resWindow = 0; | |
| 1269 while (vim_isxdigit(*end)) | |
| 1270 { | |
| 1271 resWindow = 16 * resWindow + (long_u)hex2nr(*end); | |
| 1272 ++end; | |
| 1273 } | |
| 1274 if (end == p + 2 || *end != ' ') | |
| 1275 resWindow = None; | |
| 1276 else | |
| 1277 { | |
| 1278 p = serial = end + 1; | |
| 1279 clientWindow = resWindow; /* Remember in global */ | |
| 1280 } | |
| 1281 break; | |
| 1282 case 'n': | |
| 1283 if (p[2] == ' ') | |
| 1284 name = p + 3; | |
| 1285 break; | |
| 1286 case 's': | |
| 1287 if (p[2] == ' ') | |
| 1288 script = p + 3; | |
| 1289 break; | |
| 39 | 1290 case 'E': |
| 1291 if (p[2] == ' ') | |
| 1292 enc = p + 3; | |
| 1293 break; | |
| 7 | 1294 } |
| 1295 while (*p != 0) | |
| 1296 p++; | |
| 1297 p++; | |
| 1298 } | |
| 1299 | |
| 1300 if (script == NULL || name == NULL) | |
| 1301 continue; | |
| 1302 | |
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1303 if (serverName != NULL && STRICMP(name, serverName) == 0) |
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1304 { |
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1305 script = serverConvert(enc, script, &tofree); |
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1306 if (asKeys) |
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1307 server_to_input_buf(script); |
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1308 else |
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1309 { |
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1310 char_u *res; |
| 3668 | 1311 |
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1312 res = eval_client_expr_to_string(script); |
| 3668 | 1313 if (resWindow != None) |
| 1314 { | |
| 1315 garray_T reply; | |
| 1316 | |
| 1317 /* Initialize the result property. */ | |
| 1318 ga_init2(&reply, 1, 100); | |
| 7009 | 1319 (void)ga_grow(&reply, 50 + STRLEN(p_enc)); |
| 3668 | 1320 sprintf(reply.ga_data, "%cr%c-E %s%c-s %s%c-r ", |
| 39 | 1321 0, 0, p_enc, 0, serial, 0); |
| 3668 | 1322 reply.ga_len = 14 + STRLEN(p_enc) + STRLEN(serial); |
| 1323 | |
| 1324 /* Evaluate the expression and return the result. */ | |
| 1325 if (res != NULL) | |
| 1326 ga_concat(&reply, res); | |
| 1327 else | |
| 1328 { | |
| 1329 ga_concat(&reply, (char_u *)_(e_invexprmsg)); | |
| 1330 ga_append(&reply, 0); | |
| 1331 ga_concat(&reply, (char_u *)"-c 1"); | |
| 1332 } | |
| 1333 ga_append(&reply, NUL); | |
| 1334 (void)AppendPropCarefully(dpy, resWindow, commProperty, | |
| 1335 reply.ga_data, reply.ga_len); | |
| 1336 ga_clear(&reply); | |
| 1337 } | |
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1338 vim_free(res); |
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1339 } |
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1340 vim_free(tofree); |
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1341 } |
| 7 | 1342 } |
| 1343 else if (*p == 'r' && p[1] == 0) | |
| 1344 { | |
| 39 | 1345 int serial, gotSerial; |
| 1346 char_u *res; | |
| 1347 PendingCommand *pcPtr; | |
| 1348 char_u *enc; | |
| 7 | 1349 |
| 1350 /* | |
| 1351 * This is a reply to some command that we sent out. Iterate | |
| 1352 * over all of its options. Stop when we reach the end of the | |
| 1353 * property or something that doesn't look like an option. | |
| 1354 */ | |
| 1355 p += 2; | |
| 1356 gotSerial = 0; | |
| 1357 res = (char_u *)""; | |
| 1358 code = 0; | |
| 39 | 1359 enc = NULL; |
| 1880 | 1360 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1361 { |
| 1362 switch (p[1]) | |
| 1363 { | |
| 1364 case 'r': | |
| 1365 if (p[2] == ' ') | |
| 1366 res = p + 3; | |
| 1367 break; | |
| 39 | 1368 case 'E': |
| 1369 if (p[2] == ' ') | |
| 1370 enc = p + 3; | |
| 1371 break; | |
| 7 | 1372 case 's': |
| 1373 if (sscanf((char *)p + 2, " %d", &serial) == 1) | |
| 1374 gotSerial = 1; | |
| 1375 break; | |
| 1376 case 'c': | |
| 1377 if (sscanf((char *)p + 2, " %d", &code) != 1) | |
| 1378 code = 0; | |
| 1379 break; | |
| 1380 } | |
| 1381 while (*p != 0) | |
| 1382 p++; | |
| 1383 p++; | |
| 1384 } | |
| 1385 | |
| 1386 if (!gotSerial) | |
| 1387 continue; | |
| 1388 | |
| 1389 /* | |
| 1390 * Give the result information to anyone who's | |
| 1391 * waiting for it. | |
| 1392 */ | |
| 1393 for (pcPtr = pendingCommands; pcPtr != NULL; pcPtr = pcPtr->nextPtr) | |
| 1394 { | |
| 1395 if (serial != pcPtr->serial || pcPtr->result != NULL) | |
| 1396 continue; | |
| 1397 | |
| 1398 pcPtr->code = code; | |
| 7009 | 1399 res = serverConvert(enc, res, &tofree); |
| 1400 if (tofree == NULL) | |
| 1401 res = vim_strsave(res); | |
| 1402 pcPtr->result = res; | |
| 7 | 1403 break; |
| 1404 } | |
| 1405 } | |
| 1406 else if (*p == 'n' && p[1] == 0) | |
| 1407 { | |
| 1408 Window win = 0; | |
| 1409 unsigned int u; | |
| 1410 int gotWindow; | |
| 1411 char_u *str; | |
| 1412 struct ServerReply *r; | |
| 39 | 1413 char_u *enc; |
| 7 | 1414 |
| 1415 /* | |
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1416 * This is a (n)otification. Sent with serverreply_send in Vim |
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1417 * script. Execute any autocommand and save it for later retrieval |
| 7 | 1418 */ |
| 1419 p += 2; | |
| 1420 gotWindow = 0; | |
| 1421 str = (char_u *)""; | |
| 39 | 1422 enc = NULL; |
| 1880 | 1423 while ((long_u)(p - propInfo) < numItems && *p == '-') |
| 7 | 1424 { |
| 1425 switch (p[1]) | |
| 1426 { | |
| 1427 case 'n': | |
| 1428 if (p[2] == ' ') | |
| 1429 str = p + 3; | |
| 1430 break; | |
| 39 | 1431 case 'E': |
| 1432 if (p[2] == ' ') | |
| 1433 enc = p + 3; | |
| 1434 break; | |
| 7 | 1435 case 'w': |
| 1436 if (sscanf((char *)p + 2, " %x", &u) == 1) | |
| 1437 { | |
| 1438 win = u; | |
| 1439 gotWindow = 1; | |
| 1440 } | |
| 1441 break; | |
| 1442 } | |
| 1443 while (*p != 0) | |
| 1444 p++; | |
| 1445 p++; | |
| 1446 } | |
| 1447 | |
| 1448 if (!gotWindow) | |
| 1449 continue; | |
| 39 | 1450 str = serverConvert(enc, str, &tofree); |
| 7 | 1451 if ((r = ServerReplyFind(win, SROP_Add)) != NULL) |
| 1452 { | |
| 1453 ga_concat(&(r->strings), str); | |
| 21 | 1454 ga_append(&(r->strings), NUL); |
| 7 | 1455 } |
| 1698 | 1456 { |
| 1457 char_u winstr[30]; | |
| 1458 | |
| 1459 sprintf((char *)winstr, "0x%x", (unsigned int)win); | |
| 1460 apply_autocmds(EVENT_REMOTEREPLY, winstr, str, TRUE, curbuf); | |
| 1461 } | |
| 39 | 1462 vim_free(tofree); |
| 7 | 1463 } |
| 1464 else | |
| 1465 { | |
| 1466 /* | |
| 1467 * Didn't recognize this thing. Just skip through the next | |
| 1468 * null character and try again. | |
| 1469 * Even if we get an 'r'(eply) we will throw it away as we | |
| 1470 * never specify (and thus expect) one | |
| 1471 */ | |
| 1472 while (*p != 0) | |
| 1473 p++; | |
| 1474 p++; | |
| 1475 } | |
| 1476 } | |
| 1477 XFree(propInfo); | |
| 1478 } | |
| 1479 | |
| 1480 /* | |
| 1481 * Append a given property to a given window, but set up an X error handler so | |
| 1482 * that if the append fails this procedure can return an error code rather | |
| 1483 * than having Xlib panic. | |
| 1484 * Return: 0 for OK, -1 for error | |
| 1485 */ | |
| 1486 static int | |
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1487 AppendPropCarefully( |
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1488 Display *dpy, /* Display on which to operate. */ |
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1489 Window window, /* Window whose property is to be modified. */ |
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1490 Atom property, /* Name of property. */ |
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1491 char_u *value, /* Characters to append to property. */ |
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1492 int length) /* How much to append */ |
| 7 | 1493 { |
| 1494 XErrorHandler old_handler; | |
| 1495 | |
| 1496 old_handler = XSetErrorHandler(x_error_check); | |
| 1497 got_x_error = FALSE; | |
| 1498 XChangeProperty(dpy, window, property, XA_STRING, 8, | |
| 1499 PropModeAppend, value, length); | |
| 1500 XSync(dpy, False); | |
| 1501 (void) XSetErrorHandler(old_handler); | |
| 1502 return got_x_error ? -1 : 0; | |
| 1503 } | |
| 1504 | |
| 1505 | |
| 1506 /* | |
| 1507 * Another X Error handler, just used to check for errors. | |
| 1508 */ | |
| 1509 static int | |
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1510 x_error_check(Display *dpy UNUSED, XErrorEvent *error_event UNUSED) |
| 7 | 1511 { |
| 1512 got_x_error = TRUE; | |
| 1513 return 0; | |
| 1514 } | |
| 1515 | |
| 1516 /* | |
| 1517 * Check if "str" looks like it had a serial number appended. | |
| 1518 * Actually just checks if the name ends in a digit. | |
| 1519 */ | |
| 1520 static int | |
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1521 IsSerialName(char_u *str) |
| 7 | 1522 { |
| 1523 int len = STRLEN(str); | |
| 1524 | |
| 1525 return (len > 1 && vim_isdigit(str[len - 1])); | |
| 1526 } | |
| 1527 #endif /* FEAT_CLIENTSERVER */ |