Windows registry access utility.

core/org.eclipse.cdt.core.tests/.settings/org.eclipse.cdt.core.prefs

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+#Sun Apr 02 23:10:10 EDT 2006
+eclipse.preferences.version=1
+indexerId=org.eclipse.cdt.core.nullindexer

core/org.eclipse.cdt.core.tests/misc/org/eclipse/cdt/core/winreg/tests/WinRegTests.java

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+package org.eclipse.cdt.core.winreg.tests;
+
+import org.eclipse.cdt.utils.WindowsRegistry;
+import org.eclipse.core.runtime.Platform;
+
+import junit.framework.TestCase;
+
+public class WinRegTests extends TestCase {
+
+	public void test1() {
+		WindowsRegistry registry = WindowsRegistry.getRegistry();
+		if (Platform.getOS().equals(Platform.OS_WIN32)) {
+			assertNotNull(registry);
+			String value = registry.getLocalMachineValue("SOFTWARE\\Microsoft\\Windows\\CurrentVersion", "ProgramFilesDir");
+			// Not sure how you set this to anything else so it seems safe.
+			assertEquals("C:\\Program Files", value);
+		} else {
+			// Should be null on non-Windows platforms
+			assertNotNull(registry);
+		}
+	}
+	
+}

core/org.eclipse.cdt.core.win32/library/nmake.mak

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+TARGET = ..\os\win32\x86\winreg.dll
+
+OBJS = winreg.obj
+
+CPPFLAGS = /nologo /I C:\Java\jdk1.5.0_06\include /I C:\Java\jdk1.5.0_06\include\win32 /DUNICODE
+
+$(TARGET):	$(OBJS)
+	link /nologo /dll /out:$(TARGET) $(OBJS) advapi32.lib user32.lib

core/org.eclipse.cdt.core.win32/library/winreg.cpp

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+#include <windows.h>
+#include <jni.h>
+#include <string.h>
+
+jstring getErrorMsg(JNIEnv * env, wchar_t * name) {
+    wchar_t msg[256];
+    wchar_t * msgBuff;
+    DWORD err = GetLastError();
+
+    FormatMessage(
+        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,
+        NULL,
+        err,
+        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+        (LPTSTR) &msgBuff,
+        0, NULL );
+
+    wsprintf(msg, L"%s failed with error %d: %s", name, err, msgBuff);
+
+    LocalFree(msgBuff);
+
+    return env->NewString((jchar *)msg, wcslen(msg));
+}
+
+extern "C"
+JNIEXPORT jstring Java_org_eclipse_cdt_utils_WindowsRegistry_getLocalMachineValue(
+	JNIEnv * env, jobject obj, jstring subkey, jstring name)
+{
+	const jchar * csubkey = env->GetStringChars(subkey, NULL);
+	const jchar * cname = env->GetStringChars(name, NULL);
+	jstring result;
+	
+	HKEY key;
+	LONG rc = RegOpenKeyEx(HKEY_LOCAL_MACHINE, (const wchar_t *)csubkey, 0, KEY_READ, &key);
+	if (rc != ERROR_SUCCESS) {
+		result = getErrorMsg(env, L"RegOpenKeyEx");
+	} else {
+		DWORD type;
+		wchar_t buffer[256];
+		DWORD len = sizeof(buffer);
+		rc = RegQueryValueEx(key, (const wchar_t *)cname, NULL, &type, (BYTE *)&buffer, &len);
+		if (rc != ERROR_SUCCESS) {
+			result = getErrorMsg(env, L"RegQueryValueEx");
+		} else {
+			result = env->NewString((jchar *)buffer, wcslen(buffer));
+		}
+	}
+
+	env->ReleaseStringChars(subkey, csubkey);
+	env->ReleaseStringChars(name, cname);
+
+	return result;
+}

core/org.eclipse.cdt.core.win32/os/win32/x86/.cvsignore

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+winreg.lib
+winreg.exp

core/org.eclipse.cdt.core/utils/org/eclipse/cdt/utils/WindowsRegistry.java

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+/**
+ * 
+ */
+package org.eclipse.cdt.utils;
+
+import org.eclipse.core.runtime.Platform;
+
+/**
+ * @author DSchaefer
+ *
+ */
+public class WindowsRegistry {
+
+	private static boolean failed = false;
+	private static WindowsRegistry registry;
+	
+	private WindowsRegistry() {
+	}
+	
+	public static WindowsRegistry getRegistry() {
+		if (registry == null && !failed) {
+			if (Platform.getOS().equals(Platform.OS_WIN32)) {
+				try {
+					System.loadLibrary("winreg");
+					registry = new WindowsRegistry();
+				} catch (UnsatisfiedLinkError e) {
+					failed = true;
+					return null;
+				}
+			} else
+				failed = true;
+		}
+		
+		return registry;
+	}
+	
+	public native String getLocalMachineValue(String subkey, String name);
+	
+}