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853
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1 /* DDE client for XEmacs.
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2 Copyright (C) 2002 Alastair J. Houghton
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not in FSF. */
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22
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23 /* -- Includes -------------------------------------------------------------- */
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24
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25 #ifdef HAVE_CONFIG_H
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26 # include <config.h>
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27 #endif
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2993
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28 #include <windows.h>
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29 #include <ddeml.h>
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853
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30 #include <stdlib.h>
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31 #include <stdio.h>
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32 #include <ctype.h>
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33 #include <errno.h>
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34
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35 static void error (const char* s1, const char* s2);
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36 static void fatal (const char *s1, const char *s2);
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37 static void * xmalloc (size_t size);
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38 static char * getNextArg (const char **ptr, unsigned *len);
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39
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40 /* -- Post-Include Defines -------------------------------------------------- */
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41
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42 /* Timeouts & delays */
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43 #define CONNECT_DELAY 500 /* ms */
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44 #define TRANSACTION_TIMEOUT 5000 /* ms */
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45 #define MAX_INPUT_IDLE_WAIT INFINITE /* ms */
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46
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47 /* DDE Strings */
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48 #define SERVICE_NAME "XEmacs"
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49 #define TOPIC_NAME "System"
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50 #define COMMAND_FORMAT "[open(\"%s%s\")]"
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51
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52 /* XEmacs program name */
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53 #define PROGRAM_TO_RUN "xemacs.exe"
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54
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55 /* -- Constants ------------------------------------------------------------- */
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56
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57 /* -- Global Variables ------------------------------------------------------ */
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58
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59 HINSTANCE hInstance;
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60 DWORD idInst = 0;
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61
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62 /* -- Function Declarations ------------------------------------------------- */
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63
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64 HDDEDATA CALLBACK ddeCallback (UINT uType, UINT uFmt, HCONV hconv,
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65 HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
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66 DWORD dwData1, DWORD dwData2);
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67
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68 int WINAPI WinMain (HINSTANCE hInst,
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69 HINSTANCE hPrev,
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70 LPSTR lpCmdLine,
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71 int nCmdShow);
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72
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73 static HCONV openConversation (void);
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74 static void closeConversation (HCONV hConv);
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75 static int doFile (HCONV hConv, LPSTR lpszFileName1, LPSTR lpszFileName2);
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76 static int parseCommandLine (HCONV hConv, LPSTR lpszCommandLine);
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77
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78 /* -- Function Definitions -------------------------------------------------- */
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79
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80 /*
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81 * Name : ddeCallback
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82 * Function: Gets called by DDEML.
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83 *
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84 */
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85
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86 HDDEDATA CALLBACK
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87 ddeCallback (UINT uType, UINT uFmt, HCONV hconv,
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88 HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
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89 DWORD dwData1, DWORD dwData2)
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90 {
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91 return (HDDEDATA) NULL;
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92 }
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93
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94 /*
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95 * Name : WinMain
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96 * Function: The program's entry point function.
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97 *
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98 */
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99
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100 int WINAPI
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101 WinMain (HINSTANCE hInst,
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102 HINSTANCE hPrev,
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103 LPSTR lpCmdLine,
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104 int nCmdShow)
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105 {
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106 HCONV hConv;
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107 int ret = 0;
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108 UINT uiRet;
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109
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110 /* Initialise the DDEML library */
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111 uiRet = DdeInitialize (&idInst,
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112 (PFNCALLBACK) ddeCallback,
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113 APPCMD_CLIENTONLY
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114 |CBF_FAIL_ALLSVRXACTIONS,
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115 0);
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116
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117 if (uiRet != DMLERR_NO_ERROR)
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118 {
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119 MessageBox (NULL, "Could not initialise DDE management library.",
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120 "winclient", MB_ICONEXCLAMATION | MB_OK);
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121
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122 return 1;
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123 }
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124
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125 /* Open a conversation */
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126 hConv = openConversation ();
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127
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128 if (hConv)
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129 {
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130 /* OK. Next, we need to parse the command line. */
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131 ret = parseCommandLine (hConv, lpCmdLine);
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132
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133 /* Close the conversation */
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134 closeConversation (hConv);
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135 }
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136
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137 DdeUninitialize (idInst);
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138
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139 return ret;
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140 }
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141
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142 /*
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143 * Name : openConversation
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144 * Function: Start a conversation.
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145 *
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146 */
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147
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148 static HCONV
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149 openConversation (void)
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150 {
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151 HSZ hszService = NULL, hszTopic = NULL;
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152 HCONV hConv = NULL;
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153
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154 /* Get the application (service) name */
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155 hszService = DdeCreateStringHandle (idInst,
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156 SERVICE_NAME,
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157 CP_WINANSI);
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158
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159 if (!hszService)
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160 {
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161 MessageBox (NULL, "Could not create string handle for service.",
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162 "winclient", MB_ICONEXCLAMATION | MB_OK);
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163
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164 goto error;
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165 }
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166
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167 /* Get the topic name */
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168 hszTopic = DdeCreateStringHandle (idInst,
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169 TOPIC_NAME,
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170 CP_WINANSI);
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171
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172 if (!hszTopic)
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173 {
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174 MessageBox (NULL, "Could not create string handle for topic.",
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175 "winclient", MB_ICONEXCLAMATION | MB_OK);
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176
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177 goto error;
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178 }
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179
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180 /* Try to connect */
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181 hConv = DdeConnect (idInst, hszService, hszTopic, NULL);
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182
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183 if (!hConv)
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184 {
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185 STARTUPINFO sti;
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186 PROCESS_INFORMATION pi;
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187 int n;
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188
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189 /* Try to start the program */
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190 ZeroMemory (&sti, sizeof (sti));
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191 sti.cb = sizeof (sti);
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192 if (!CreateProcess (NULL, PROGRAM_TO_RUN, NULL, NULL, FALSE, 0,
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193 NULL, NULL, &sti, &pi))
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194 {
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195 MessageBox (NULL, "Could not start process.",
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196 "winclient", MB_ICONEXCLAMATION | MB_OK);
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197
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198 goto error;
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199 }
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200
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201 /* Wait for the process to enter an idle state */
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202 WaitForInputIdle (pi.hProcess, MAX_INPUT_IDLE_WAIT);
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203
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204 /* Close the handles */
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205 CloseHandle (pi.hThread);
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206 CloseHandle (pi.hProcess);
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207
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208 /* Try to connect */
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209 for (n = 0; n < 5; n++)
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210 {
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211 Sleep (CONNECT_DELAY);
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212
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213 hConv = DdeConnect (idInst, hszService, hszTopic, NULL);
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214
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215 if (hConv)
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216 break;
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217 }
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218
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219 if (!hConv)
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220 {
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221 /* Still couldn't connect. */
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222 MessageBox (NULL, "Could not connect to DDE server.",
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223 "winclient", MB_ICONEXCLAMATION | MB_OK);
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224
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225 goto error;
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226 }
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227 }
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228
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229 /* Release the string handles */
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230 DdeFreeStringHandle (idInst, hszService);
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231 DdeFreeStringHandle (idInst, hszTopic);
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232
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233 return hConv;
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234
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235 error:
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236 if (hConv)
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237 DdeDisconnect (hConv);
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238 if (hszService)
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239 DdeFreeStringHandle (idInst, hszService);
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240 if (hszTopic)
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241 DdeFreeStringHandle (idInst, hszTopic);
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242
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243 return NULL;
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244 }
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245
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246 /*
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247 * Name : closeConversation
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248 * Function: Close a conversation.
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249 *
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250 */
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251
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252 static void
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253 closeConversation (HCONV hConv)
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254 {
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255 /* Shut down */
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256 DdeDisconnect (hConv);
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257 }
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258
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259 /*
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260 * Name : doFile
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261 * Function: Process a file.
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262 *
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263 */
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264
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265 int
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266 doFile (HCONV hConv, LPSTR lpszFileName1, LPSTR lpszFileName2)
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267 {
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268 char *buf = NULL;
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269 unsigned len;
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270
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271 /* Calculate the buffer length */
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272 len = strlen (lpszFileName1) + strlen (lpszFileName2)
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273 + strlen (COMMAND_FORMAT);
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274
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275 /* Allocate a buffer */
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276 buf = (char *) xmalloc (len);
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277
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278 if (!buf)
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279 {
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280 MessageBox (NULL, "Not enough memory.",
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281 "winclient", MB_ICONEXCLAMATION | MB_OK);
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282
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283 return 1;
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284 }
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285
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286 /* Build the command */
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287 len = wsprintf (buf, COMMAND_FORMAT, lpszFileName1, lpszFileName2);
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288
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289 len++;
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290
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291 /* OK. We're connected. Send the message. */
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292 DdeClientTransaction (buf, len, hConv, NULL,
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293 0, XTYP_EXECUTE, TRANSACTION_TIMEOUT, NULL);
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294
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295 free (buf);
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296
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297 return 0;
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298 }
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299
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300 /*
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301 * Name : getNextArg
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302 * Function: Retrieve the next command line argument.
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303 *
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304 */
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305
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306 static char *
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307 getNextArg (const char **ptr, unsigned *len)
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308 {
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309 int in_quotes = 0, quit = 0, all_in_quotes = 0;
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310 const char *p = *ptr, *start;
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311 char *buf = NULL;
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312 unsigned length = 0;
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313
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314 /* Skip whitespace */
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315 while (*p && isspace (*p))
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316 p++;
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317
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318 /* If this is the end, return NULL */
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319 if (!*p)
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320 return NULL;
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321
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322 /* Remember where we are */
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323 start = p;
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324
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325 /* Find the next whitespace character outside quotes */
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326 if (*p == '"')
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327 all_in_quotes = 1;
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328
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329 while (*p && !quit)
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330 {
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331 switch (*p)
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332 {
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333 case '"':
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334 in_quotes = 1 - in_quotes;
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335 p++;
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336 break;
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337
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338 case '\\':
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339 if (!in_quotes)
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340 all_in_quotes = 0;
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341
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342 p++;
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343
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344 if (!*p)
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345 break;
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346
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347 p++;
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348 break;
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349
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350 default:
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351 if (isspace (*p) && !in_quotes)
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352 quit = 1;
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353 else if (!in_quotes)
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354 all_in_quotes = 0;
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355
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356 if (!quit)
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357 p++;
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358 }
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359 }
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360
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361 /* Work out the length */
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362 length = p - start;
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363
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364 /* Strip quotes if the argument is completely quoted */
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365 if (all_in_quotes)
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366 {
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367 start++;
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368 length -= 2;
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369 }
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370
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371 /* Copy */
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372 buf = (char *) xmalloc (length + 1);
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373
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374 if (!buf)
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375 return NULL;
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376
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377 strncpy (buf, start, length);
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378 buf[length] = '\0';
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379
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380 /* Return the pointer and length */
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381 *ptr = p;
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382 *len = length;
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383
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384 return buf;
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385 }
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386
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387 /*
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388 * Name : parseCommandLine
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389 * Function: Process the command line. This program accepts a list of strings
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390 * : (which may contain wildcards) representing filenames.
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391 *
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392 */
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393
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394 int
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395 parseCommandLine (HCONV hConv, LPSTR lpszCommandLine)
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396 {
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397 char *fullpath, *filepart;
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398 char *arg;
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399 unsigned len, pathlen;
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400 int ret = 0;
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401 HANDLE hFindFile = NULL;
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402 WIN32_FIND_DATA wfd;
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403
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404 /* Retrieve arguments */
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405 while ((arg = getNextArg ((const char**)&lpszCommandLine, &len)) != NULL)
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406 {
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407 /* First find the canonical path name */
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408 fullpath = filepart = NULL;
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409 pathlen = GetFullPathName (arg, 0, fullpath, &filepart);
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410
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411 fullpath = (char *) xmalloc (pathlen);
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412
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413 if (!fullpath)
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414 {
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415 MessageBox (NULL, "Not enough memory.", "winclient",
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416 MB_ICONEXCLAMATION | MB_OK);
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417
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418 ret = 1;
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419 free (arg);
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420
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421 break;
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422 }
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423
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424 GetFullPathName (arg, pathlen, fullpath, &filepart);
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425
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426 /* Find the first matching file */
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427 hFindFile = FindFirstFile (arg, &wfd);
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428
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429 if (hFindFile == INVALID_HANDLE_VALUE)
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430 ret = doFile (hConv, fullpath, "");
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431 else
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432 {
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433 /* Chop off the file part from the full path name */
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434 if (filepart)
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435 *filepart = '\0';
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436
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437 /* For each matching file */
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438 do
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439 {
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440 /* Process it */
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441 ret = doFile (hConv, fullpath, wfd.cFileName);
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442
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443 if (ret)
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444 break;
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445 }
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446 while (FindNextFile (hFindFile, &wfd));
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447
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448 FindClose (hFindFile);
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449 }
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450
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451 /* Release the path name buffers */
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452 free (fullpath);
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453 free (arg);
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454
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455 if (ret)
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456 break;
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457 }
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458
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459 return ret;
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460 }
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461
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462 static void
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463 fatal (const char *s1, const char *s2)
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464 {
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|
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465 error (s1, s2);
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466 exit (1);
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467 }
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468
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469 /* Print error message. `s1' is printf control string, `s2' is arg for it. */
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470 static void
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471 error (const char* s1, const char* s2)
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472 {
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473 fprintf (stderr, "winclient: ");
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474 fprintf (stderr, s1, s2);
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475 fprintf (stderr, "\n");
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476 }
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477
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478 /* Like malloc but get fatal error if memory is exhausted. */
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479
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480 static void *
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481 xmalloc (size_t size)
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482 {
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483 void *result = malloc (size);
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484 if (result == NULL)
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485 fatal ("virtual memory exhausted", (char *) 0);
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486 return result;
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487 }
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