refactor source tree organization, switch to meson

src/api-impl/android/os/UserHandle.java

@@ -0,0 +1,207 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.os;
+
+import java.io.PrintWriter;
+
+/**
+ * Representation of a user on the device.
+ */
+public final class UserHandle {
+    /**
+     * @hide Range of uids allocated for a user.
+     */
+    public static final int PER_USER_RANGE = 100000;
+
+    /** @hide A user id to indicate all users on the device */
+    public static final int USER_ALL = -1;
+
+    /** @hide A user handle to indicate all users on the device */
+    public static final UserHandle ALL = new UserHandle(USER_ALL);
+
+    /** @hide A user id to indicate the currently active user */
+    public static final int USER_CURRENT = -2;
+
+    /** @hide A user handle to indicate the current user of the device */
+    public static final UserHandle CURRENT = new UserHandle(USER_CURRENT);
+
+    /** @hide A user id to indicate that we would like to send to the current
+     *  user, but if this is calling from a user process then we will send it
+     *  to the caller's user instead of failing wiht a security exception */
+    public static final int USER_CURRENT_OR_SELF = -3;
+
+    /** @hide A user handle to indicate that we would like to send to the current
+     *  user, but if this is calling from a user process then we will send it
+     *  to the caller's user instead of failing wiht a security exception */
+    public static final UserHandle CURRENT_OR_SELF = new UserHandle(USER_CURRENT_OR_SELF);
+
+    /** @hide An undefined user id */
+    public static final int USER_NULL = -10000;
+
+    /** @hide A user id constant to indicate the "owner" user of the device */
+    public static final int USER_OWNER = 0;
+
+    /** @hide A user handle to indicate the primary/owner user of the device */
+    public static final UserHandle OWNER = new UserHandle(USER_OWNER);
+
+    /**
+     * @hide Enable multi-user related side effects. Set this to false if
+     * there are problems with single user use-cases.
+     */
+    public static final boolean MU_ENABLED = true;
+
+    final int mHandle;
+
+    /**
+     * Checks to see if the user id is the same for the two uids, i.e., they belong to the same
+     * user.
+     * @hide
+     */
+    public static final boolean isSameUser(int uid1, int uid2) {
+        return getUserId(uid1) == getUserId(uid2);
+    }
+
+    /**
+     * Checks to see if both uids are referring to the same app id, ignoring the user id part of the
+     * uids.
+     * @param uid1 uid to compare
+     * @param uid2 other uid to compare
+     * @return whether the appId is the same for both uids
+     * @hide
+     */
+    public static final boolean isSameApp(int uid1, int uid2) {
+        return getAppId(uid1) == getAppId(uid2);
+    }
+
+    /** @hide */
+    public static final boolean isIsolated(int uid) {
+            return false;
+    }
+
+    /** @hide */
+    public static boolean isApp(int uid) {
+            return true;
+    }
+
+    /**
+     * Returns the user id for a given uid.
+     * @hide
+     */
+    public static final int getUserId(int uid) {
+        if (MU_ENABLED) {
+            return uid / PER_USER_RANGE;
+        } else {
+            return 0;
+        }
+    }
+
+    /** @hide */
+    public static final int getCallingUserId() {
+        return 1000; // FIXME
+    }
+
+    /**
+     * Returns the uid that is composed from the userId and the appId.
+     * @hide
+     */
+    public static final int getUid(int userId, int appId) {
+        if (MU_ENABLED) {
+            return userId * PER_USER_RANGE + (appId % PER_USER_RANGE);
+        } else {
+            return appId;
+        }
+    }
+
+    /**
+     * Returns the app id (or base uid) for a given uid, stripping out the user id from it.
+     * @hide
+     */
+    public static final int getAppId(int uid) {
+        return uid % PER_USER_RANGE;
+    }
+
+    /**
+     * Returns the shared app gid for a given uid or appId.
+     * @hide
+     */
+    public static final int getSharedAppGid(int id) {
+        return id; // TODO wtf is this
+    }
+
+    /**
+     * Generate a text representation of the uid, breaking out its individual
+     * components -- user, app, isolated, etc.
+     * @hide
+     */
+    public static void formatUid(StringBuilder sb, int uid) {
+            sb.append(uid);
+    }
+
+    /**
+     * Generate a text representation of the uid, breaking out its individual
+     * components -- user, app, isolated, etc.
+     * @hide
+     */
+    public static void formatUid(PrintWriter pw, int uid) {
+            pw.print(uid);
+    }
+
+    /**
+     * Returns the user id of the current process
+     * @return user id of the current process
+     * @hide
+     */
+    public static final int myUserId() {
+        return 1000;
+    }
+
+    /** @hide */
+    public UserHandle(int h) {
+        mHandle = h;
+    }
+
+    /** @hide */
+    public int getIdentifier() {
+        return mHandle;
+    }
+
+    @Override
+    public String toString() {
+        return "UserHandle{" + mHandle + "}";
+    }
+
+    @Override
+    public boolean equals(Object obj) {
+        try {
+            if (obj != null) {
+                UserHandle other = (UserHandle)obj;
+                return mHandle == other.mHandle;
+            }
+        } catch (ClassCastException e) {
+        }
+        return false;
+    }
+
+    @Override
+    public int hashCode() {
+        return mHandle;
+    }
+    
+    public int describeContents() {
+        return 0;
+    }
+}