windows.c

   1 /* windows.c */
   2 /* implements Windows specific functions */
   3 #include "display-gtk.h"
   4 #include <windows.h>
   5
   6 static HKEY hkey;
   7
   8 static int get_from_registry(HKEY hkey, const char *key)
   9 {
  10         DWORD value;
  11         DWORD len = 4;
  12         LONG success;
  13
  14         success = RegQueryValueEx(hkey, TEXT(key), NULL, NULL,
  15                                 (LPBYTE) &value, &len );
  16         if (success != ERROR_SUCCESS)
  17                 return FALSE; /* that's what happens the first time we start */
  18         return value;
  19 }
  20
  21 void subsurface_open_conf(void)
  22 {
  23         LONG success;
  24
  25         success = RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("Software\\subsurface"), 0,
  26                         KEY_QUERY_VALUE, &hkey);
  27         if (success != ERROR_SUCCESS) {
  28                 success = RegCreateKeyEx(HKEY_CURRENT_USER, TEXT("Software\\subsurface"),
  29                                         0L, NULL, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS,
  30                                         NULL, &hkey, NULL);
  31                 if (success != ERROR_SUCCESS)
  32                         printf("CreateKey Software\\subsurface failed %ld\n", success);
  33         }
  34 }
  35
  36 void subsurface_set_conf(char *name, pref_type_t type, const void *value)
  37 {
  38         switch (type) {
  39         case PREF_BOOL:
  40                 /* we simply store the value as DWORD */
  41                 RegSetValueEx(hkey, TEXT(name), 0, REG_DWORD, (DWORD)value, 4);
  42                 break;
  43         case PREF_STRING:
  44                 RegSetValueEx(hkey, TEXT(name), 0, REG_SZ, value, strlen(value));
  45         }
  46 }
  47
  48 const void *subsurface_get_conf(char *name, pref_type_t type)
  49 {
  50         char *string;
  51         int len;
  52
  53         switch (type) {
  54         case PREF_BOOL:
  55                 return get_from_registry(hkey, name) ? (void *) 1 : NULL;
  56         case PREF_STRING:
  57                 string = malloc(80);
  58                 len = 80;
  59                 success = RegQueryValueEx(hkey, TEXT(name), NULL, NULL,
  60                                         (LPBYTE) string, &len );
  61                 if (success != ERROR_SUCCESS) {
  62                         /* that's what happens the first time we start - just return NULL */
  63                         free(string);
  64                         return NULL;
  65                 }
  66                 return string;
  67         }
  68         /* we shouldn't get here */
  69         return NULL;
  70 }
  71
  72 void subsurface_close_conf(void)
  73 {
  74         if (RegFlushKey(hkey) != ERROR_SUCCESS)
  75                 printf("RegFlushKey failed %ld\n");
  76         RegCloseKey(hkey);
  77 }