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819
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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 /* -- Pre-Include Defines --------------------------------------------------- */
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24
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25 #define STRICT
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26
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27 /* -- Includes -------------------------------------------------------------- */
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28
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29 #include <windows.h>
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30 #ifdef HAVE_CONFIG_H
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31 # include <config.h>
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32 #endif
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33 #include <stdlib.h>
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34 #include <stdio.h>
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35 #include <ctype.h>
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36 #include <errno.h>
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37
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38 static void error (const char* s1, const char* s2);
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39 static void fatal (const char *s1, const char *s2);
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40 static void * xmalloc (size_t size);
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41 static char * getNextArg (const char **ptr, unsigned *len);
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42
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43 /* -- Post-Include Defines -------------------------------------------------- */
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44
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45 /* Timeouts & delays */
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46 #define CONNECT_DELAY 500 /* ms */
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47 #define TRANSACTION_TIMEOUT 5000 /* ms */
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48 #define MAX_INPUT_IDLE_WAIT INFINITE /* ms */
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49
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50 /* DDE Strings */
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51 #define SERVICE_NAME "XEmacs"
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52 #define TOPIC_NAME "System"
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53 #define COMMAND_FORMAT "[open(\"%s%s\")]"
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54
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55 /* XEmacs program name */
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56 #define PROGRAM_TO_RUN "xemacs.exe"
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57
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58 /* -- Constants ------------------------------------------------------------- */
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59
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60 /* -- Global Variables ------------------------------------------------------ */
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61
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62 HINSTANCE hInstance;
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63 DWORD idInst = 0;
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64
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65 /* -- Function Declarations ------------------------------------------------- */
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66
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67 HDDEDATA CALLBACK ddeCallback (UINT uType, UINT uFmt, HCONV hconv,
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68 HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
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69 DWORD dwData1, DWORD dwData2);
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70
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71 int WINAPI WinMain (HINSTANCE hInst,
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72 HINSTANCE hPrev,
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73 LPSTR lpCmdLine,
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74 int nCmdShow);
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75
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76 static HCONV openConversation (void);
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77 static void closeConversation (HCONV hConv);
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78 static int doFile (HCONV hConv, LPSTR lpszFileName1, LPSTR lpszFileName2);
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79 static int parseCommandLine (HCONV hConv, LPSTR lpszCommandLine);
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80
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81 /* -- Function Definitions -------------------------------------------------- */
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82
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83 /*
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84 * Name : ddeCallback
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85 * Function: Gets called by DDEML.
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86 *
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87 */
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88
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89 HDDEDATA CALLBACK
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90 ddeCallback (UINT uType, UINT uFmt, HCONV hconv,
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91 HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
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92 DWORD dwData1, DWORD dwData2)
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93 {
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94 return (HDDEDATA) NULL;
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95 }
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96
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97 /*
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98 * Name : WinMain
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99 * Function: The program's entry point function.
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100 *
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101 */
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102
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103 int WINAPI
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104 WinMain (HINSTANCE hInst,
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105 HINSTANCE hPrev,
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106 LPSTR lpCmdLine,
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107 int nCmdShow)
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108 {
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109 HCONV hConv;
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110 int ret = 0;
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111 UINT uiRet;
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112
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113 /* Initialise the DDEML library */
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114 uiRet = DdeInitialize (&idInst,
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115 (PFNCALLBACK) ddeCallback,
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116 APPCMD_CLIENTONLY
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117 |CBF_FAIL_ALLSVRXACTIONS,
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118 0);
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119
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120 if (uiRet != DMLERR_NO_ERROR)
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121 {
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122 MessageBox (NULL, "Could not initialise DDE management library.",
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123 "winclient", MB_ICONEXCLAMATION | MB_OK);
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124
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125 return 1;
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126 }
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127
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128 /* Open a conversation */
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129 hConv = openConversation ();
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130
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131 if (hConv)
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132 {
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133 /* OK. Next, we need to parse the command line. */
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134 ret = parseCommandLine (hConv, lpCmdLine);
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135
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136 /* Close the conversation */
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137 closeConversation (hConv);
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138 }
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139
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140 DdeUninitialize (idInst);
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141
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142 return ret;
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143 }
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144
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145 /*
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146 * Name : openConversation
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147 * Function: Start a conversation.
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148 *
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149 */
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150
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151 static HCONV
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152 openConversation (void)
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153 {
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154 HSZ hszService = NULL, hszTopic = NULL;
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155 HCONV hConv = NULL;
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156
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157 /* Get the application (service) name */
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158 hszService = DdeCreateStringHandle (idInst,
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159 SERVICE_NAME,
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160 CP_WINANSI);
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161
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162 if (!hszService)
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163 {
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164 MessageBox (NULL, "Could not create string handle for service.",
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165 "winclient", MB_ICONEXCLAMATION | MB_OK);
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166
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167 goto error;
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168 }
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169
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170 /* Get the topic name */
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171 hszTopic = DdeCreateStringHandle (idInst,
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172 TOPIC_NAME,
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173 CP_WINANSI);
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174
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175 if (!hszTopic)
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176 {
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177 MessageBox (NULL, "Could not create string handle for topic.",
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178 "winclient", MB_ICONEXCLAMATION | MB_OK);
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179
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180 goto error;
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181 }
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182
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183 /* Try to connect */
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184 hConv = DdeConnect (idInst, hszService, hszTopic, NULL);
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185
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186 if (!hConv)
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187 {
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188 STARTUPINFO sti;
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189 PROCESS_INFORMATION pi;
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190 int n;
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191
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192 /* Try to start the program */
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193 ZeroMemory (&sti, sizeof (sti));
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194 sti.cb = sizeof (sti);
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195 if (!CreateProcess (NULL, PROGRAM_TO_RUN, NULL, NULL, FALSE, 0,
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196 NULL, NULL, &sti, &pi))
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197 {
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198 MessageBox (NULL, "Could not start process.",
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199 "winclient", MB_ICONEXCLAMATION | MB_OK);
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200
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201 goto error;
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202 }
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203
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204 /* Wait for the process to enter an idle state */
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205 WaitForInputIdle (pi.hProcess, MAX_INPUT_IDLE_WAIT);
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206
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207 /* Close the handles */
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208 CloseHandle (pi.hThread);
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209 CloseHandle (pi.hProcess);
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210
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211 /* Try to connect */
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212 for (n = 0; n < 5; n++)
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213 {
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214 Sleep (CONNECT_DELAY);
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215
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216 hConv = DdeConnect (idInst, hszService, hszTopic, NULL);
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217
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218 if (hConv)
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219 break;
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220 }
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221
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222 if (!hConv)
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223 {
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224 /* Still couldn't connect. */
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225 MessageBox (NULL, "Could not connect to DDE server.",
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226 "winclient", MB_ICONEXCLAMATION | MB_OK);
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227
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228 goto error;
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229 }
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230 }
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231
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232 /* Release the string handles */
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233 DdeFreeStringHandle (idInst, hszService);
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234 DdeFreeStringHandle (idInst, hszTopic);
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235
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236 return hConv;
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237
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238 error:
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239 if (hConv)
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240 DdeDisconnect (hConv);
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241 if (hszService)
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242 DdeFreeStringHandle (idInst, hszService);
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243 if (hszTopic)
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244 DdeFreeStringHandle (idInst, hszTopic);
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245
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246 return NULL;
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247 }
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248
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249 /*
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250 * Name : closeConversation
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251 * Function: Close a conversation.
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252 *
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253 */
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254
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255 static void
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256 closeConversation (HCONV hConv)
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257 {
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258 /* Shut down */
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259 DdeDisconnect (hConv);
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260 }
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261
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262 /*
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263 * Name : doFile
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264 * Function: Process a file.
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265 *
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266 */
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267
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268 int
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269 doFile (HCONV hConv, LPSTR lpszFileName1, LPSTR lpszFileName2)
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270 {
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271 char *buf = NULL;
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272 unsigned len;
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273
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274 /* Calculate the buffer length */
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275 len = strlen (lpszFileName1) + strlen (lpszFileName2)
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276 + strlen (COMMAND_FORMAT);
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277
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278 /* Allocate a buffer */
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279 buf = (char *) xmalloc (len);
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280
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281 if (!buf)
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282 {
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283 MessageBox (NULL, "Not enough memory.",
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284 "winclient", MB_ICONEXCLAMATION | MB_OK);
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285
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286 return 1;
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287 }
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288
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289 /* Build the command */
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290 len = wsprintf (buf, COMMAND_FORMAT, lpszFileName1, lpszFileName2);
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291
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292 len++;
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293
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294 /* OK. We're connected. Send the message. */
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295 DdeClientTransaction (buf, len, hConv, NULL,
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296 0, XTYP_EXECUTE, TRANSACTION_TIMEOUT, NULL);
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297
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298 free (buf);
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299
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300 return 0;
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301 }
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302
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303 /*
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304 * Name : getNextArg
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305 * Function: Retrieve the next command line argument.
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306 *
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307 */
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308
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309 static char *
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310 getNextArg (const char **ptr, unsigned *len)
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311 {
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312 int in_quotes = 0, quit = 0, all_in_quotes = 0;
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313 const char *p = *ptr, *start;
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314 char *buf = NULL;
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315 unsigned length = 0;
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316
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317 /* Skip whitespace */
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318 while (*p && isspace (*p))
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319 p++;
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320
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321 /* If this is the end, return NULL */
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322 if (!*p)
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323 return NULL;
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324
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325 /* Remember where we are */
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326 start = p;
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327
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328 /* Find the next whitespace character outside quotes */
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329 if (*p == '"')
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330 all_in_quotes = 1;
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331
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332 while (*p && !quit)
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333 {
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334 switch (*p)
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335 {
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336 case '"':
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337 in_quotes = 1 - in_quotes;
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338 p++;
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339 break;
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340
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341 case '\\':
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342 if (!in_quotes)
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343 all_in_quotes = 0;
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344
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345 p++;
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346
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347 if (!*p)
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348 break;
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349
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350 p++;
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351 break;
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352
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353 default:
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354 if (isspace (*p) && !in_quotes)
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355 quit = 1;
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356 else if (!in_quotes)
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357 all_in_quotes = 0;
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358
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359 if (!quit)
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360 p++;
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361 }
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362 }
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363
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364 /* Work out the length */
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365 length = p - start;
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366
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367 /* Strip quotes if the argument is completely quoted */
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368 if (all_in_quotes)
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369 {
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370 start++;
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371 length -= 2;
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372 }
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373
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374 /* Copy */
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375 buf = (char *) xmalloc (length + 1);
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376
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377 if (!buf)
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378 return NULL;
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379
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380 strncpy (buf, start, length);
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381 buf[length] = '\0';
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382
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383 /* Return the pointer and length */
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384 *ptr = p;
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385 *len = length;
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386
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387 return buf;
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388 }
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389
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390 /*
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391 * Name : parseCommandLine
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392 * Function: Process the command line. This program accepts a list of strings
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393 * : (which may contain wildcards) representing filenames.
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394 *
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395 */
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396
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397 int
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398 parseCommandLine (HCONV hConv, LPSTR lpszCommandLine)
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399 {
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400 char *fullpath, *filepart;
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401 char *arg;
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402 unsigned len, pathlen;
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403 int ret = 0;
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404 HANDLE hFindFile = NULL;
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405 WIN32_FIND_DATA wfd;
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406
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407 /* Retrieve arguments */
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408 while ((arg = getNextArg ((const char**)&lpszCommandLine, &len)) != NULL)
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409 {
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410 /* First find the canonical path name */
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411 fullpath = filepart = NULL;
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412 pathlen = GetFullPathName (arg, 0, fullpath, &filepart);
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413
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414 fullpath = (char *) xmalloc (pathlen);
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415
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416 if (!fullpath)
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417 {
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418 MessageBox (NULL, "Not enough memory.", "winclient",
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419 MB_ICONEXCLAMATION | MB_OK);
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420
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421 ret = 1;
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422 free (arg);
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423
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424 break;
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425 }
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426
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427 GetFullPathName (arg, pathlen, fullpath, &filepart);
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428
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429 /* Find the first matching file */
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430 hFindFile = FindFirstFile (arg, &wfd);
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431
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432 if (hFindFile == INVALID_HANDLE_VALUE)
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433 ret = doFile (hConv, fullpath, "");
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434 else
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435 {
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436 /* Chop off the file part from the full path name */
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437 if (filepart)
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438 *filepart = '\0';
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439
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440 /* For each matching file */
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441 do
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442 {
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443 /* Process it */
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444 ret = doFile (hConv, fullpath, wfd.cFileName);
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445
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446 if (ret)
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447 break;
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448 }
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449 while (FindNextFile (hFindFile, &wfd));
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450
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451 FindClose (hFindFile);
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452 }
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453
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454 /* Release the path name buffers */
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455 free (fullpath);
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456 free (arg);
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457
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458 if (ret)
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459 break;
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460 }
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461
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462 return ret;
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463 }
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464
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465 static void
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466 fatal (const char *s1, const char *s2)
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467 {
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468 error (s1, s2);
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469 exit (1);
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470 }
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471
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472 /* Print error message. `s1' is printf control string, `s2' is arg for it. */
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473 static void
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474 error (const char* s1, const char* s2)
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475 {
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476 fprintf (stderr, "winclient: ");
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477 fprintf (stderr, s1, s2);
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478 fprintf (stderr, "\n");
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479 }
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480
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481 /* Like malloc but get fatal error if memory is exhausted. */
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482
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483 static void *
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484 xmalloc (size_t size)
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485 {
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486 void *result = malloc (size);
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487 if (result == NULL)
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488 fatal ("virtual memory exhausted", (char *) 0);
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489 return result;
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490 }
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