Split reading/writing preferences into OS specific files

[ext/subsurface.git] / windows.c

diff --git a/windows.c b/windows.c
new file mode 100644 (file)
index 0000000..df04aa0
--- /dev/null
+++ b/windows.c
@@ -0,0 +1,77 @@
+/* windows.c */
+/* implements Windows specific functions */
+#include "display-gtk.h"
+#include <windows.h>
+
+static HKEY hkey;
+
+static int get_from_registry(HKEY hkey, const char *key)
+{
+       DWORD value;
+       DWORD len = 4;
+       LONG success;
+
+       success = RegQueryValueEx(hkey, TEXT(key), NULL, NULL,
+                               (LPBYTE) &value, &len );
+       if (success != ERROR_SUCCESS)
+               return FALSE; /* that's what happens the first time we start */
+       return value;
+}
+
+void subsurface_open_conf(void)
+{
+       LONG success;
+
+       success = RegOpenKeyEx(HKEY_CURRENT_USER, TEXT("Software\\subsurface"), 0,
+                       KEY_QUERY_VALUE, &hkey);
+       if (success != ERROR_SUCCESS) {
+               success = RegCreateKeyEx(HKEY_CURRENT_USER, TEXT("Software\\subsurface"),
+                                       0L, NULL, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS,
+                                       NULL, &hkey, NULL);
+               if (success != ERROR_SUCCESS)
+                       printf("CreateKey Software\\subsurface failed %ld\n", success);
+       }
+}
+
+void subsurface_set_conf(char *name, pref_type_t type, const void *value)
+{
+       switch (type) {
+       case PREF_BOOL:
+               /* we simply store the value as DWORD */
+               RegSetValueEx(hkey, TEXT(name), 0, REG_DWORD, (DWORD)value, 4);
+               break;
+       case PREF_STRING:
+               RegSetValueEx(hkey, TEXT(name), 0, REG_SZ, value, strlen(value));
+       }
+}
+
+const void *subsurface_get_conf(char *name, pref_type_t type)
+{
+       char *string;
+       int len;
+
+       switch (type) {
+       case PREF_BOOL:
+               return get_from_registry(hkey, name) ? (void *) 1 : NULL;
+       case PREF_STRING:
+               string = malloc(80);
+               len = 80;
+               success = RegQueryValueEx(hkey, TEXT(name), NULL, NULL,
+                                       (LPBYTE) string, &len );
+               if (success != ERROR_SUCCESS) {
+                       /* that's what happens the first time we start - just return NULL */
+                       free(string);
+                       return NULL;
+               }
+               return string;
+       }
+       /* we shouldn't get here */
+       return NULL;
+}
+
+void subsurface_close_conf(void)
+{
+       if (RegFlushKey(hkey) != ERROR_SUCCESS)
+               printf("RegFlushKey failed %ld\n");
+       RegCloseKey(hkey);
+}