dlls/ctapi32/ctapi32.c

   1 /*
   2  * WINE ct-api wrapper
   3  *
   4  * Copyright 2007 Christian Eggers
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23 #include <string.h>
  24 #include "wine/library.h"
  25 #include "wine/debug.h"
  26 #include "windef.h"
  27 #include "winreg.h"
  28 #include "winnls.h"
  29 #include "ctapi.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(ctapi32);
  32
  33 #define FALLBACK_LIBCTAPI "libctapi.so"
  34 static const WCHAR value_name[] = {'l','i','b','r','a','r','y',0};
  35
  36
  37 static IS8 (*pCT_init)(IU16 ctn, IU16 pn) = NULL;
  38 static IS8 (*pCT_data)(IU16 ctn, IU8 *dad, IU8 *sad, IU16 lenc, IU8 *command,
  39         IU16 *lenr, IU8 *response) = NULL;
  40 static IS8 (*pCT_close)(IU16 ctn) = NULL;
  41
  42 static void *ctapi_handle = NULL;
  43
  44
  45 static int load_functions(void) {
  46         char soname[MAX_PATH] = FALLBACK_LIBCTAPI, buffer[MAX_PATH];
  47         LONG result;
  48         HKEY key_handle;
  49
  50         if (pCT_init) /* loaded already */
  51                 return 0;
  52
  53         /* Try to get name of low level library from registry */
  54         /* @@ Wine registry key: HKCU\Software\Wine\ctapi32 */
  55         result = RegOpenKeyExA(HKEY_CURRENT_USER, "Software\\Wine\\ctapi32", 0, KEY_READ, &key_handle);
  56         if (result == ERROR_SUCCESS) {
  57                 DWORD type, size;
  58                 WCHAR buffer_w[MAX_PATH];
  59
  60                 size = sizeof(buffer_w) - sizeof(WCHAR);  /* Leave space for null termination */
  61                 result = RegQueryValueExW(key_handle, value_name, NULL, &type, (LPBYTE)buffer_w, &size);
  62                 if ((result == ERROR_SUCCESS) && (type == REG_SZ)) {
  63                         int len;
  64
  65                         /* Null termination */
  66                         buffer_w[size / sizeof(WCHAR)] = '\0';
  67                         len = WideCharToMultiByte(CP_UNIXCP, 0, buffer_w, -1, buffer, sizeof(buffer), NULL, NULL);
  68                         if (len)
  69                                 memcpy(soname, buffer, len);
  70                 }
  71                 RegCloseKey(key_handle);
  72         }
  73
  74         TRACE("Loading library '%s'\n", soname);
  75         ctapi_handle = wine_dlopen(soname, RTLD_NOW, NULL, 0);
  76         if (ctapi_handle) {
  77                 TRACE("Successfully loaded '%s'\n", soname);
  78         }
  79         else {
  80                 MESSAGE("Wine cannot find any usable hardware library, ctapi32.dll not working.\n");
  81                 MESSAGE("Please create the key \"HKEY_CURRENT_USER\\Software\\Wine\\ctapi32\" in your registry\n");
  82                 MESSAGE("and set the value \"library\" to your library name (e.g. \"libctapi-cyberjack.so.1\" or \"/usr/lib/readers/libctapi.so\").\n");
  83                 return 1;
  84         }
  85
  86 #define LOAD_FUNCPTR(f) if((p##f = wine_dlsym(ctapi_handle, #f, NULL, 0)) == NULL){WARN("Can't find symbol %s\n", #f); return 1;}
  87 LOAD_FUNCPTR(CT_init);
  88 LOAD_FUNCPTR(CT_data);
  89 LOAD_FUNCPTR(CT_close);
  90 #undef LOAD_FUNCPTR
  91
  92         return 0;
  93 }
  94
  95 static void unload_functions(void)
  96 {
  97         pCT_close = NULL;
  98         pCT_data = NULL;
  99         pCT_init = NULL;
 100         if (ctapi_handle)
 101                 wine_dlclose(ctapi_handle, NULL, 0);
 102 }
 103
 104
 105 /*
 106  *  ct-API specific functions
 107  */
 108
 109 IS8 WINAPI WIN_CT_init(IU16 ctn, IU16 pn)
 110 {
 111         if (!pCT_init)
 112                 return ERR_HOST;
 113         return pCT_init(ctn, pn);
 114 }
 115
 116 IS8 WINAPI WIN_CT_data(IU16 ctn, IU8 *dad, IU8 *sad, IU16 lenc, IU8 *command, IU16 *lenr, IU8 *response)
 117 {
 118         if (!pCT_data)
 119                 return ERR_HOST;
 120         return pCT_data(ctn, dad, sad, lenc, command, lenr, response);
 121 }
 122
 123 IS8 WINAPI WIN_CT_close(IU16 ctn)
 124 {
 125         if (!pCT_close)
 126                 return ERR_HOST;
 127         return pCT_close(ctn);
 128 }
 129
 130 /*
 131  *  Dll Main function
 132  */
 133 BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 134 {
 135     TRACE("%p,%x,%p\n", hinstDLL, fdwReason, lpvReserved);
 136
 137     switch (fdwReason)
 138     {
 139         case DLL_PROCESS_ATTACH:
 140         {
 141             DisableThreadLibraryCalls(hinstDLL);
 142             /* Try to load low-level library */
 143             if (load_functions() != 0)
 144                 return FALSE;  /* error */
 145             break;
 146         }
 147         case DLL_PROCESS_DETACH:
 148         {
 149             unload_functions();
 150             break;
 151         }
 152     }
 153
 154     return TRUE;
 155 }