Implement BlGetConfigBooleanValue() routine

xtldr/config.c

@@ -9,6 +9,39 @@
 #include <xtldr.h>
 
 
+/**
+ * Returns a boolean value of the specified configuration key.
+ *
+ * @param ConfigName
+ *        Specifies the configuration key to return its boolean representation.
+ *
+ * @return This routine returns a boolean representation of the configuration value.
+ *
+ * @since XT 1.0
+ */
+XTCDECL
+BOOLEAN
+BlGetConfigBooleanValue(IN CONST PWCHAR ConfigName)
+{
+    PWCHAR Value;
+
+    /* Get config value */
+    Value = BlGetConfigValue(ConfigName);
+
+    /* Check if option is enabled */
+    if(RtlCompareWideStringInsensitive(Value, L"ENABLED", 0) == 0 ||
+       RtlCompareWideStringInsensitive(Value, L"ON", 0) == 0 ||
+       RtlCompareWideStringInsensitive(Value, L"TRUE", 0) == 0 ||
+       RtlCompareWideStringInsensitive(Value, L"YES", 0) == 0)
+    {
+        /* This option is enabled */
+        return TRUE;
+    }
+
+    /* Return FALSE by default */
+    return FALSE;
+}
+
 /**
  * Returns a value of the specified configuration key.
  *

xtldr/includes/xtldr.h

@@ -123,6 +123,10 @@ XTCDECL
 EFI_STATUS
 BlFreeMemoryPool(IN PVOID Memory);
 
+XTCDECL
+BOOLEAN
+BlGetConfigBooleanValue(IN CONST PWCHAR ConfigName);
+
 XTCDECL
 PWCHAR
 BlGetConfigValue(IN CONST PWCHAR ConfigName);

xtldr/xtldr.c

@@ -112,7 +112,7 @@ BlInitializeBootMenuList(OUT PXTBL_BOOTMENU_ITEM MenuEntries,
     DefaultMenuEntry = BlGetConfigValue(L"DEFAULT");
 
     /* Check if configuration allows to use last booted OS */
-    if(RtlCompareWideStringInsensitive(BlGetConfigValue(L"KEEPLASTBOOT"), L"TRUE", 0) == 0)
+    if(BlGetConfigBooleanValue(L"KEEPLASTBOOT"))
     {
         /* Attempt to get last booted Operating System from NVRAM */
         Status = BlGetEfiVariable(&VendorGuid, L"XtLdrLastBootOS", (PVOID*)&LastBooted);
@@ -312,7 +312,7 @@ BlInvokeBootProtocol(IN PWCHAR ShortName,
     }
 
     /* Check if chosen operating system should be saved */
-    if(RtlCompareWideStringInsensitive(BlGetConfigValue(L"KEEPLASTBOOT"), L"TRUE", 0) == 0)
+    if(BlGetConfigBooleanValue(L"KEEPLASTBOOT"))
     {
         /* Save chosen operating system in NVRAM */
         Status = BlSetEfiVariable(&VendorGuid, L"XtLdrLastBootOS", (PVOID)ShortName, RtlWideStringLength(ShortName, 0) * sizeof(WCHAR));