nt/ddeclient.c

   1 /* Simple client interface to DDE servers.
   2    Copyright (C) 1998, 2001-2017 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software: you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation, either version 3 of the License, or (at
   9 your option) any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs.  If not, see <https://www.gnu.org/licenses/>.  */
  18
  19 #include <windows.h>
  20 #include <ddeml.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23
  24 HDDEDATA CALLBACK DdeCallback (UINT, UINT, HCONV, HSZ, HSZ, HDDEDATA, DWORD,
  25                                DWORD);
  26
  27 HDDEDATA CALLBACK
  28 DdeCallback (UINT uType, UINT uFmt, HCONV hconv,
  29              HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
  30              DWORD dwData1, DWORD dwData2)
  31 {
  32   return ((HDDEDATA) NULL);
  33 }
  34
  35 #define DdeCommand(str)         \
  36         DdeClientTransaction (str, strlen (str)+1, HConversation, (HSZ)NULL, \
  37                               CF_TEXT, XTYP_EXECUTE, 30000, NULL)
  38
  39 int
  40 main (int argc, char *argv[])
  41 {
  42   DWORD idDde = 0;
  43   HCONV HConversation;
  44   HSZ   Server;
  45   HSZ   Topic = 0;
  46   char  command[1024];
  47
  48   if (argc < 2)
  49     {
  50       fprintf (stderr, "usage: ddeclient server [topic]\n");
  51       exit (1);
  52     }
  53
  54   DdeInitialize (&idDde, (PFNCALLBACK)DdeCallback, APPCMD_CLIENTONLY, 0);
  55
  56   Server = DdeCreateStringHandle (idDde, argv[1], CP_WINANSI);
  57   if (argc > 2)
  58     Topic = DdeCreateStringHandle (idDde, argv[2], CP_WINANSI);
  59
  60   HConversation = DdeConnect (idDde, Server, Topic, NULL);
  61   if (HConversation != 0)
  62     {
  63       while (fgets (command, sizeof(command), stdin) != NULL)
  64         DdeCommand (command);
  65
  66       DdeDisconnect (HConversation);
  67     }
  68
  69   DdeFreeStringHandle (idDde, Server);
  70   if (Topic)
  71     DdeFreeStringHandle (idDde, Topic);
  72   DdeUninitialize (idDde);
  73
  74   return (0);
  75 }