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/debug.h"
  25 #include "windef.h"
  26 #include "winreg.h"
  27 #include "winnls.h"
  28 #include "ctapi.h"
  29
  30 WINE_DEFAULT_DEBUG_CHANNEL(ctapi32);
  31
  32 #define FALLBACK_LIBCTAPI "libctapi.so"
  33 static const WCHAR value_name[] = {'l','i','b','r','a','r','y',0};
  34
  35
  36 static IS8 (*pCT_init)(IU16 ctn, IU16 pn) = NULL;
  37 static IS8 (*pCT_data)(IU16 ctn, IU8 *dad, IU8 *sad, IU16 lenc, IU8 *command,
  38         IU16 *lenr, IU8 *response) = NULL;
  39 static IS8 (*pCT_close)(IU16 ctn) = NULL;
  40
  41 static void *ctapi_handle = NULL;
  42
  43
  44 static BOOL load_functions(void) {
  45         char soname[MAX_PATH] = FALLBACK_LIBCTAPI, buffer[MAX_PATH];
  46         LONG result;
  47         HKEY key_handle;
  48
  49         if (pCT_init) /* loaded already */
  50                 return TRUE;
  51
  52         /* Try to get name of low level library from registry */
  53         /* @@ Wine registry key: HKCU\Software\Wine\ctapi32 */
  54         result = RegOpenKeyExA(HKEY_CURRENT_USER, "Software\\Wine\\ctapi32", 0, KEY_READ, &key_handle);
  55         if (result == ERROR_SUCCESS) {
  56                 DWORD type, size;
  57                 WCHAR buffer_w[MAX_PATH];
  58
  59                 size = sizeof(buffer_w) - sizeof(WCHAR);  /* Leave space for null termination */
  60                 result = RegQueryValueExW(key_handle, value_name, NULL, &type, (LPBYTE)buffer_w, &size);
  61                 if ((result == ERROR_SUCCESS) && (type == REG_SZ)) {
  62                         int len;
  63
  64                         /* Null termination */
  65                         buffer_w[size / sizeof(WCHAR)] = '\0';
  66                         len = WideCharToMultiByte(CP_UNIXCP, 0, buffer_w, -1, buffer, sizeof(buffer), NULL, NULL);
  67                         if (len)
  68                                 memcpy(soname, buffer, len);
  69                 }
  70                 RegCloseKey(key_handle);
  71         }
  72
  73         TRACE("Loading library '%s'\n", soname);
  74         ctapi_handle = dlopen(soname, RTLD_NOW);
  75         if (ctapi_handle) {
  76                 TRACE("Successfully loaded '%s'\n", soname);
  77         }
  78         else {
  79                 MESSAGE("Wine cannot find any usable hardware library, ctapi32.dll not working.\n");
  80                 MESSAGE("Please create the key \"HKEY_CURRENT_USER\\Software\\Wine\\ctapi32\" in your registry\n");
  81                 MESSAGE("and set the value \"library\" to your library name (e.g. \"libctapi-cyberjack.so.1\" or \"/usr/lib/readers/libctapi.so\").\n");
  82                 return FALSE;
  83         }
  84
  85 #define LOAD_FUNCPTR(f) if((p##f = dlsym(ctapi_handle, #f)) == NULL){WARN("Can't find symbol %s\n", #f); return FALSE;}
  86 LOAD_FUNCPTR(CT_init);
  87 LOAD_FUNCPTR(CT_data);
  88 LOAD_FUNCPTR(CT_close);
  89 #undef LOAD_FUNCPTR
  90
  91         return TRUE;
  92 }
  93
  94 /*
  95  *  ct-API specific functions
  96  */
  97
  98 IS8 WINAPI WIN_CT_init(IU16 ctn, IU16 pn)
  99 {
 100         if (!pCT_init)
 101                 return ERR_HOST;
 102         return pCT_init(ctn, pn);
 103 }
 104
 105 IS8 WINAPI WIN_CT_data(IU16 ctn, IU8 *dad, IU8 *sad, IU16 lenc, IU8 *command, IU16 *lenr, IU8 *response)
 106 {
 107         if (!pCT_data)
 108                 return ERR_HOST;
 109         return pCT_data(ctn, dad, sad, lenc, command, lenr, response);
 110 }
 111
 112 IS8 WINAPI WIN_CT_close(IU16 ctn)
 113 {
 114         if (!pCT_close)
 115                 return ERR_HOST;
 116         return pCT_close(ctn);
 117 }
 118
 119 /*
 120  *  Dll Main function
 121  */
 122 BOOL WINAPI DllMain (HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 123 {
 124     TRACE("%p,%x,%p\n", hinstDLL, fdwReason, lpvReserved);
 125
 126     switch (fdwReason)
 127     {
 128         case DLL_PROCESS_ATTACH:
 129             DisableThreadLibraryCalls(hinstDLL);
 130             /* Try to load low-level library */
 131             if (!load_functions())
 132                 return FALSE;  /* error */
 133             break;
 134         case DLL_PROCESS_DETACH:
 135             if (lpvReserved) break;
 136             if (ctapi_handle) dlclose(ctapi_handle);
 137             break;
 138     }
 139
 140     return TRUE;
 141 }