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442
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1 /* Utility routines for XEmacs on Windows 9x, NT and Cygwin.
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2 Copyright (C) 2000 Ben Wing.
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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 the Free
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18 Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
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19 02111-1307, USA. */
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20
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21 #include <config.h>
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22 #include "lisp.h"
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23
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24 #include "buffer.h"
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611
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25
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26 #include "syssignal.h"
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27 #include "systime.h"
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442
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28 #include "syswindows.h"
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29
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30 typedef BOOL (WINAPI *pfSwitchToThread_t) (VOID);
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31 pfSwitchToThread_t xSwitchToThread;
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32
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33 typedef HKL (WINAPI *pfGetKeyboardLayout_t) (DWORD);
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34 pfGetKeyboardLayout_t xGetKeyboardLayout;
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35 typedef BOOL (WINAPI *pfSetMenuDefaultItem_t) (HMENU, UINT, UINT);
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36 pfSetMenuDefaultItem_t xSetMenuDefaultItem;
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37 typedef BOOL (WINAPI *pfInsertMenuItemA_t)
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38 (HMENU, UINT, BOOL, LPCMENUITEMINFOA);
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39 pfInsertMenuItemA_t xInsertMenuItemA;
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40 typedef BOOL (WINAPI *pfInsertMenuItemW_t)
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41 (HMENU, UINT, BOOL, LPCMENUITEMINFOW);
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42 pfInsertMenuItemW_t xInsertMenuItemW;
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43 typedef HANDLE (WINAPI *pfLoadImageA_t)
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44 (HINSTANCE, LPCSTR, UINT, int, int, UINT);
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45 pfLoadImageA_t xLoadImageA;
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46 typedef HANDLE (WINAPI *pfLoadImageW_t)
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47 (HINSTANCE, LPCWSTR, UINT, int, int, UINT);
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48 pfLoadImageW_t xLoadImageW;
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49 typedef ATOM (WINAPI *pfRegisterClassExA_t) (CONST WNDCLASSEXA *);
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50 pfRegisterClassExA_t xRegisterClassExA;
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51 typedef ATOM (WINAPI *pfRegisterClassExW_t) (CONST WNDCLASSEXW *);
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52 pfRegisterClassExW_t xRegisterClassExW;
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53
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54 typedef int (WINAPI *pfEnumFontFamiliesExA_t)
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55 (HDC, LPLOGFONTA, FONTENUMPROCA, LPARAM, DWORD);
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56 pfEnumFontFamiliesExA_t xEnumFontFamiliesExA;
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57 typedef int (WINAPI *pfEnumFontFamiliesExW_t)
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58 (HDC, LPLOGFONTW, FONTENUMPROCW, LPARAM, DWORD);
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59 pfEnumFontFamiliesExW_t xEnumFontFamiliesExW;
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60
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61 typedef DWORD (WINAPI *pfSHGetFileInfoA_t)
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62 (LPCSTR, DWORD, SHFILEINFOA FAR *, UINT, UINT);
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63 pfSHGetFileInfoA_t xSHGetFileInfoA;
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64 typedef DWORD (WINAPI *pfSHGetFileInfoW_t)
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65 (LPCWSTR, DWORD, SHFILEINFOW FAR *, UINT, UINT);
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66 pfSHGetFileInfoW_t xSHGetFileInfoW;
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67
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531
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68 typedef NET_API_STATUS (NET_API_FUNCTION *pfNetUserEnum_t)
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69 (
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70 IN LPCWSTR servername OPTIONAL,
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71 IN DWORD level,
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72 IN DWORD filter,
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73 OUT LPBYTE *bufptr,
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74 IN DWORD prefmaxlen,
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75 OUT LPDWORD entriesread,
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76 OUT LPDWORD totalentries,
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77 IN OUT LPDWORD resume_handle OPTIONAL
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78 );
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79 pfNetUserEnum_t xNetUserEnum;
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80
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81 typedef NET_API_STATUS (NET_API_FUNCTION *pfNetApiBufferFree_t)
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82 (
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83 IN LPVOID Buffer
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84 );
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85 pfNetApiBufferFree_t xNetApiBufferFree;
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86
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442
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87 Lisp_Object
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88 tstr_to_local_file_format (Extbyte *pathout)
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89 {
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578
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90 Bufbyte *ttlff;
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442
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91 Lisp_Object in;
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92
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93 EXTERNAL_TO_C_STRING (pathout, ttlff, Qmswindows_tstr);
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94 WIN32_TO_LOCAL_FILE_FORMAT (ttlff, in);
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95
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96 return in;
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97 }
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98
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99 static void
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100 init_potentially_nonexistent_functions (void)
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101 {
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102 HMODULE h_kernel = GetModuleHandle ("kernel32");
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103 HMODULE h_user = GetModuleHandle ("user32");
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104 HMODULE h_gdi = GetModuleHandle ("gdi32");
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105 HMODULE h_shell = GetModuleHandle ("shell32");
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531
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106 /* the following does not seem to get mapped in automatically */
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107 HMODULE h_netapi = LoadLibrary ("netapi32.dll");
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442
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108
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109 if (h_kernel)
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110 {
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111 xSwitchToThread =
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112 (pfSwitchToThread_t) GetProcAddress (h_kernel, "SwitchToThread");
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113 }
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114
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115 if (h_user)
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116 {
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117 xGetKeyboardLayout =
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118 (pfGetKeyboardLayout_t) GetProcAddress (h_user, "GetKeyboardLayout");
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119 xSetMenuDefaultItem =
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120 (pfSetMenuDefaultItem_t) GetProcAddress (h_user, "SetMenuDefaultItem");
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121 xInsertMenuItemA =
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122 (pfInsertMenuItemA_t) GetProcAddress (h_user, "InsertMenuItemA");
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123 xInsertMenuItemW =
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124 (pfInsertMenuItemW_t) GetProcAddress (h_user, "InsertMenuItemW");
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125 xLoadImageA =
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126 (pfLoadImageA_t) GetProcAddress (h_user, "LoadImageA");
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127 xLoadImageW =
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128 (pfLoadImageW_t) GetProcAddress (h_user, "LoadImageW");
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129 xRegisterClassExA =
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130 (pfRegisterClassExA_t) GetProcAddress (h_user, "RegisterClassExA");
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131 xRegisterClassExW =
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132 (pfRegisterClassExW_t) GetProcAddress (h_user, "RegisterClassExW");
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133 }
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134
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135 if (h_gdi)
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136 {
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137 xEnumFontFamiliesExA =
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138 (pfEnumFontFamiliesExA_t) GetProcAddress (h_gdi, "EnumFontFamiliesExA");
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139 xEnumFontFamiliesExW =
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140 (pfEnumFontFamiliesExW_t) GetProcAddress (h_gdi, "EnumFontFamiliesExW");
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141 }
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142
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143 if (h_shell)
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144 {
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145 xSHGetFileInfoA =
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146 (pfSHGetFileInfoA_t) GetProcAddress (h_shell, "SHGetFileInfoA");
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147 xSHGetFileInfoW =
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148 (pfSHGetFileInfoW_t) GetProcAddress (h_shell, "SHGetFileInfoW");
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149 }
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531
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150
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151 if (h_netapi)
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152 {
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153 xNetUserEnum =
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154 (pfNetUserEnum_t) GetProcAddress (h_netapi, "NetUserEnum");
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155 xNetApiBufferFree =
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156 (pfNetApiBufferFree_t) GetProcAddress (h_netapi, "NetApiBufferFree");
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157 }
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442
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158 }
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159
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160 DEFUN ("mswindows-shell-execute", Fmswindows_shell_execute, 2, 4, 0, /*
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161 Get Windows to perform OPERATION on DOCUMENT.
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162 This is a wrapper around the ShellExecute system function, which
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163 invokes the application registered to handle OPERATION for DOCUMENT.
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164 OPERATION is typically \"open\", \"print\" or \"explore\" (but can be
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165 nil for the default action), and DOCUMENT is typically the name of a
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166 document file or URL, but can also be a program executable to run or
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167 a directory to open in the Windows Explorer.
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168
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169 If DOCUMENT is a program executable, PARAMETERS can be a string
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170 containing command line parameters, but otherwise should be nil.
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171
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172 SHOW-FLAG can be used to control whether the invoked application is hidden
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173 or minimized. If SHOW-FLAG is nil, the application is displayed normally,
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174 otherwise it is an integer representing a ShowWindow flag:
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175
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176 0 - start hidden
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177 1 - start normally
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178 3 - start maximized
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179 6 - start minimized
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180 */
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181 (operation, document, parameters, show_flag))
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182 {
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183 /* Encode filename and current directory. */
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184 Lisp_Object current_dir = Ffile_name_directory (document);
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185 char* path = NULL;
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186 char* doc = NULL;
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187 Extbyte* f=0;
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188 int ret;
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189 struct gcpro gcpro1, gcpro2;
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190
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191 CHECK_STRING (document);
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192
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193 if (NILP (current_dir))
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194 current_dir = current_buffer->directory;
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195
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196 GCPRO2 (current_dir, document);
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197
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198 /* Use mule and cygwin-safe APIs top get at file data. */
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199 if (STRINGP (current_dir))
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200 {
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201 TO_EXTERNAL_FORMAT (LISP_STRING, current_dir,
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202 C_STRING_ALLOCA, f,
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203 Qfile_name);
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204 #ifdef CYGWIN
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205 CYGWIN_WIN32_PATH (f, path);
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206 #else
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207 path = f;
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208 #endif
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209 }
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210
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211 if (STRINGP (document))
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212 {
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213 TO_EXTERNAL_FORMAT (LISP_STRING, document,
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214 C_STRING_ALLOCA, f,
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215 Qfile_name);
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216 #ifdef CYGWIN
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217 CYGWIN_WIN32_PATH (f, doc);
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218 #else
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219 doc = f;
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220 #endif
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221 }
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222
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223 UNGCPRO;
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224
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225 ret = (int) ShellExecute (NULL,
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226 (STRINGP (operation) ?
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593
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227 /* !!#### more mule bogosity */
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228 (char *) XSTRING_DATA (operation) : NULL),
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442
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229 doc,
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230 (STRINGP (parameters) ?
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593
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231 /* !!#### more mule bogosity */
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232 (char *) XSTRING_DATA (parameters) : NULL),
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442
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233 path,
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234 (INTP (show_flag) ?
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235 XINT (show_flag) : SW_SHOWDEFAULT));
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236
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237 if (ret > 32)
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238 return Qt;
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239
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240 if (ret == ERROR_FILE_NOT_FOUND)
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563
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241 signal_error (Qfile_error, "file not found", document);
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442
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242 else if (ret == ERROR_PATH_NOT_FOUND)
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563
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243 signal_error (Qfile_error, "path not found", current_dir);
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442
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244 else if (ret == ERROR_BAD_FORMAT)
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563
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245 signal_error (Qfile_error, "bad executable format", document);
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442
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246 else
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563
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247 signal_error (Qinternal_error, "internal error", Qunbound);
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442
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248
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249 return Qnil;
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250 }
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251
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613
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252 #if defined (WIN32_NATIVE) || defined (CYGWIN_BROKEN_SIGNALS)
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253
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254 /* setitimer() does not exist on native MS Windows, and appears broken
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255 on Cygwin (random lockups when BROKEN_SIGIO is defined), so we
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256 emulate in both cases by using multimedia timers. Furthermore,
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257 the lockups still occur on Cygwin even when we do nothing but
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258 use the standard signalling mechanism -- so we have to emulate
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259 that, too. (But only for timeouts -- we have to use the standard
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260 mechanism for SIGCHLD. Yuck.)
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261 */
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262
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263
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264 /*--------------------------------------------------------------------*/
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265 /* Signal support */
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266 /*--------------------------------------------------------------------*/
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267
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268 #define sigmask(nsig) (1U << nsig)
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269
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270 /* We can support as many signals as fit into word */
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271 #define SIG_MAX 32
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272
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273 /* Signal handlers. Initial value = 0 = SIG_DFL */
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274 static mswindows_sighandler signal_handlers[SIG_MAX] = {0};
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275
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276 /* Signal block mask: bit set to 1 means blocked */
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277 unsigned signal_block_mask = 0;
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278
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279 /* Signal pending mask: bit set to 1 means sig is pending */
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280 unsigned signal_pending_mask = 0;
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281
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282 mswindows_sighandler
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283 mswindows_sigset (int nsig, mswindows_sighandler handler)
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284 {
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285 /* We delegate some signals to the system function */
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286 if (nsig == SIGFPE || nsig == SIGABRT || nsig == SIGINT)
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287 return signal (nsig, handler);
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288
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289 if (nsig < 0 || nsig > SIG_MAX)
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290 {
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291 errno = EINVAL;
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292 return NULL;
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293 }
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294
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295 /* Store handler ptr */
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296 {
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297 mswindows_sighandler old_handler = signal_handlers[nsig];
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298 signal_handlers[nsig] = handler;
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299 return old_handler;
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300 }
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301 }
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302
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303 int
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304 mswindows_sighold (int nsig)
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305 {
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306 if (nsig < 0 || nsig > SIG_MAX)
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307 return errno = EINVAL;
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308
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309 signal_block_mask |= sigmask (nsig);
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310 return 0;
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311 }
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312
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313 int
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314 mswindows_sigrelse (int nsig)
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315 {
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316 if (nsig < 0 || nsig > SIG_MAX)
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317 return errno = EINVAL;
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318
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319 signal_block_mask &= ~sigmask (nsig);
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320
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321 if (signal_pending_mask & sigmask (nsig))
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322 mswindows_raise (nsig);
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323
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324 return 0;
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325 }
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326
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327 int
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328 mswindows_sigpause (int nsig)
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329 {
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330 /* This is currently not called, because the only call to sigpause
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331 inside XEmacs is with SIGCHLD parameter. Just in case, we put an
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332 assert here, so anyone adds a call to sigpause will be surprised
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333 (or surprise someone else...) */
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334 assert (0);
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335 return 0;
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336 }
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337
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338 int
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339 mswindows_raise (int nsig)
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340 {
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341 /* We delegate some raises to the system routine */
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342 if (nsig == SIGFPE || nsig == SIGABRT || nsig == SIGINT)
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343 return raise (nsig);
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344
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345 if (nsig < 0 || nsig > SIG_MAX)
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346 return errno = EINVAL;
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347
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348 /* If the signal is blocked, remember to issue later */
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349 if (signal_block_mask & sigmask (nsig))
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350 {
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351 signal_pending_mask |= sigmask (nsig);
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352 return 0;
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353 }
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354
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355 if (signal_handlers[nsig] == SIG_IGN)
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356 return 0;
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357
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358 if (signal_handlers[nsig] != SIG_DFL)
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359 {
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360 (*signal_handlers[nsig]) (nsig);
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361 return 0;
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362 }
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363
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364 /* Default signal actions */
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365 if (nsig == SIGALRM || nsig == SIGPROF)
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366 exit (3);
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367
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368 /* Other signals are ignored by default */
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369 return 0;
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370 }
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371
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611
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372
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373 /*--------------------------------------------------------------------*/
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374 /* Async timers */
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375 /*--------------------------------------------------------------------*/
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376
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377 /* We emulate two timers, one for SIGALRM, another for SIGPROF.
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378
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379 itimerproc() function has an implementation limitation: it does
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380 not allow to set *both* interval and period. If an attempt is
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381 made to set both, and then they are unequal, the function
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382 asserts.
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383
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384 Minimum timer resolution on Win32 systems varies, and is greater
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385 than or equal than 1 ms. The resolution is always wrapped not to
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386 attempt to get below the system defined limit.
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387 */
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388
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389 /* Timer precision, denominator of one fraction: for 100 ms
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390 interval, request 10 ms precision
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391 */
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392 const int setitimer_helper_timer_prec = 10;
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393
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394 /* Last itimervals, as set by calls to setitimer */
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395 static struct itimerval it_alarm;
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396 static struct itimerval it_prof;
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397
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398 /* Timer IDs as returned by MM */
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399 MMRESULT tid_alarm = 0;
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400 MMRESULT tid_prof = 0;
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401
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402 static void CALLBACK
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403 setitimer_helper_proc (UINT uID, UINT uMsg, DWORD dwUser,
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404 DWORD dw1, DWORD dw2)
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405 {
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406 /* Just raise the signal indicated by the dwUser parameter */
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407 mswindows_raise (dwUser);
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408 }
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409
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410 /* Divide time in ms specified by IT by DENOM. Return 1 ms
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411 if division results in zero */
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412 static UINT
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413 setitimer_helper_period (const struct itimerval* it, UINT denom)
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414 {
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415 static TIMECAPS time_caps;
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416
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417 UINT res;
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418 const struct timeval* tv =
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419 (it->it_value.tv_sec == 0 && it->it_value.tv_usec == 0)
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420 ? &it->it_interval : &it->it_value;
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421
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422 /* Zero means stop timer */
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423 if (tv->tv_sec == 0 && tv->tv_usec == 0)
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424 return 0;
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425
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426 /* Convert to ms and divide by denom */
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427 res = (tv->tv_sec * 1000 + (tv->tv_usec + 500) / 1000) / denom;
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428
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429 /* Converge to minimum timer resolution */
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430 if (time_caps.wPeriodMin == 0)
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431 timeGetDevCaps (&time_caps, sizeof(time_caps));
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432
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433 if (res < time_caps.wPeriodMin)
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434 res = time_caps.wPeriodMin;
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435
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436 return res;
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437 }
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438
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439 static int
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440 setitimer_helper (const struct itimerval* itnew,
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441 struct itimerval* itold, struct itimerval* itcurrent,
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442 MMRESULT* tid, DWORD sigkind)
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443 {
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444 UINT delay, resolution, event_type;
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445
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446 /* First stop the old timer */
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447 if (*tid)
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448 {
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449 timeKillEvent (*tid);
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450 timeEndPeriod (setitimer_helper_period (itcurrent,
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451 setitimer_helper_timer_prec));
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452 *tid = 0;
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453 }
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454
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455 /* Return old itimerval if requested */
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456 if (itold)
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457 *itold = *itcurrent;
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458
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459 *itcurrent = *itnew;
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460
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461 /* Determine if to start new timer */
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462 delay = setitimer_helper_period (itnew, 1);
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463 if (delay)
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464 {
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465 resolution = setitimer_helper_period (itnew,
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466 setitimer_helper_timer_prec);
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467 event_type = (itnew->it_value.tv_sec == 0 &&
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468 itnew->it_value.tv_usec == 0)
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469 ? TIME_ONESHOT : TIME_PERIODIC;
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470 timeBeginPeriod (resolution);
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471 *tid = timeSetEvent (delay, resolution, setitimer_helper_proc, sigkind,
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472 event_type);
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473 }
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474
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475 return !delay || *tid;
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476 }
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477
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478 int
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479 mswindows_setitimer (int kind, const struct itimerval *itnew,
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480 struct itimerval *itold)
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481 {
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482 /* In this version, both interval and value are allowed
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483 only if they are equal. */
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484 assert ((itnew->it_value.tv_sec == 0 && itnew->it_value.tv_usec == 0)
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485 || (itnew->it_interval.tv_sec == 0 &&
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486 itnew->it_interval.tv_usec == 0)
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487 || (itnew->it_value.tv_sec == itnew->it_interval.tv_sec &&
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488 itnew->it_value.tv_usec == itnew->it_interval.tv_usec));
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489
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490 if (kind == ITIMER_REAL)
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491 return setitimer_helper (itnew, itold, &it_alarm, &tid_alarm, SIGALRM);
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492 else if (kind == ITIMER_PROF)
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493 return setitimer_helper (itnew, itold, &it_prof, &tid_prof, SIGPROF);
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494 else
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495 return errno = EINVAL;
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496 }
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497
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613
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498 #endif /* defined (WIN32_NATIVE) || defined (CYGWIN_BROKEN_SIGNALS) */
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499
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611
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500
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442
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501 void
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502 syms_of_win32 (void)
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503 {
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504 DEFSUBR (Fmswindows_shell_execute);
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505 }
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506
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507 void
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508 init_win32 (void)
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509 {
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510 init_potentially_nonexistent_functions ();
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511 }
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