1/*
2 * Copyright (C) 2006 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package android.text.format;
18
19import android.content.Context;
20import android.net.NetworkUtils;
21
22/**
23 * Utility class to aid in formatting common values that are not covered
24 * by the {@link java.util.Formatter} class in {@link java.util}
25 */
26public final class Formatter {
27
28    /**
29     * Formats a content size to be in the form of bytes, kilobytes, megabytes, etc
30     *
31     * @param context Context to use to load the localized units
32     * @param number size value to be formatted
33     * @return formatted string with the number
34     */
35    public static String formatFileSize(Context context, long number) {
36        return formatFileSize(context, number, false);
37    }
38
39    /**
40     * Like {@link #formatFileSize}, but trying to generate shorter numbers
41     * (showing fewer digits of precision).
42     */
43    public static String formatShortFileSize(Context context, long number) {
44        return formatFileSize(context, number, true);
45    }
46
47    private static String formatFileSize(Context context, long number, boolean shorter) {
48        if (context == null) {
49            return "";
50        }
51
52        float result = number;
53        int suffix = com.android.internal.R.string.byteShort;
54        if (result > 900) {
55            suffix = com.android.internal.R.string.kilobyteShort;
56            result = result / 1024;
57        }
58        if (result > 900) {
59            suffix = com.android.internal.R.string.megabyteShort;
60            result = result / 1024;
61        }
62        if (result > 900) {
63            suffix = com.android.internal.R.string.gigabyteShort;
64            result = result / 1024;
65        }
66        if (result > 900) {
67            suffix = com.android.internal.R.string.terabyteShort;
68            result = result / 1024;
69        }
70        if (result > 900) {
71            suffix = com.android.internal.R.string.petabyteShort;
72            result = result / 1024;
73        }
74        String value;
75        if (result < 1) {
76            value = String.format("%.2f", result);
77        } else if (result < 10) {
78            if (shorter) {
79                value = String.format("%.1f", result);
80            } else {
81                value = String.format("%.2f", result);
82            }
83        } else if (result < 100) {
84            if (shorter) {
85                value = String.format("%.0f", result);
86            } else {
87                value = String.format("%.2f", result);
88            }
89        } else {
90            value = String.format("%.0f", result);
91        }
92        return context.getResources().
93            getString(com.android.internal.R.string.fileSizeSuffix,
94                      value, context.getString(suffix));
95    }
96
97    /**
98     * Returns a string in the canonical IP format ###.###.###.### from a packed integer containing
99     * the IP address.  The IP address is expected to be in little-endian format (LSB first). That
100     * is, 0x01020304 will return "4.3.2.1".
101     *
102     * @param ipv4Address the IP address as a packed integer with LSB first.
103     * @return string with canonical IP address format.
104     *
105     * @deprecated this method doesn't support IPv6 addresses. Prefer {@link
106     *     java.net.InetAddress#getHostAddress()}, which supports both IPv4 and
107     *     IPv6 addresses.
108     */
109    @Deprecated
110    public static String formatIpAddress(int ipv4Address) {
111        return NetworkUtils.intToInetAddress(ipv4Address).getHostAddress();
112    }
113}
114