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-rw-r--r--src/com/android/camera/support/common/Utils.java325
1 files changed, 325 insertions, 0 deletions
diff --git a/src/com/android/camera/support/common/Utils.java b/src/com/android/camera/support/common/Utils.java
new file mode 100644
index 000000000..f36d6adcd
--- /dev/null
+++ b/src/com/android/camera/support/common/Utils.java
@@ -0,0 +1,325 @@
+package com.android.camera.support.common;
+
+
+import android.content.Context;
+import android.content.pm.PackageInfo;
+import android.content.pm.PackageManager.NameNotFoundException;
+import android.database.Cursor;
+import android.os.Build;
+import android.os.ParcelFileDescriptor;
+import android.text.TextUtils;
+import android.util.Log;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.io.InterruptedIOException;
+
+public class Utils {
+ private static final String TAG = "Utils";
+ private static final String DEBUG_TAG = "GalleryDebug";
+
+ private static final long POLY64REV = 0x95AC9329AC4BC9B5L;
+ private static final long INITIALCRC = 0xFFFFFFFFFFFFFFFFL;
+
+ private static long[] sCrcTable = new long[256];
+
+ private static final boolean IS_DEBUG_BUILD =
+ Build.TYPE.equals("eng") || Build.TYPE.equals("userdebug");
+
+ private static final String MASK_STRING = "********************************";
+
+ // Throws AssertionError if the input is false.
+ public static void assertTrue(boolean cond) {
+ if (!cond) {
+ throw new AssertionError();
+ }
+ }
+
+ // Throws AssertionError with the message. We had a method having the form
+ // assertTrue(boolean cond, String message, Object ... args);
+ // However a call to that method will cause memory allocation even if the
+ // condition is false (due to autoboxing generated by "Object ... args"),
+ // so we don't use that anymore.
+ public static void fail(String message, Object ... args) {
+ throw new AssertionError(
+ args.length == 0 ? message : String.format(message, args));
+ }
+
+ // Throws NullPointerException if the input is null.
+ public static <T> T checkNotNull(T object) {
+ if (object == null) throw new NullPointerException();
+ return object;
+ }
+
+ // Returns true if two input Object are both null or equal
+ // to each other.
+ public static boolean equals(Object a, Object b) {
+ return (a == b) || (a == null ? false : a.equals(b));
+ }
+
+ // Returns the next power of two.
+ // Returns the input if it is already power of 2.
+ // Throws IllegalArgumentException if the input is <= 0 or
+ // the answer overflows.
+ public static int nextPowerOf2(int n) {
+ if (n <= 0 || n > (1 << 30)) throw new IllegalArgumentException("n is invalid: " + n);
+ n -= 1;
+ n |= n >> 16;
+ n |= n >> 8;
+ n |= n >> 4;
+ n |= n >> 2;
+ n |= n >> 1;
+ return n + 1;
+ }
+
+ // Returns the previous power of two.
+ // Returns the input if it is already power of 2.
+ // Throws IllegalArgumentException if the input is <= 0
+ public static int prevPowerOf2(int n) {
+ if (n <= 0) throw new IllegalArgumentException();
+ return Integer.highestOneBit(n);
+ }
+
+ // Returns the input value x clamped to the range [min, max].
+ public static int clamp(int x, int min, int max) {
+ if (x > max) return max;
+ if (x < min) return min;
+ return x;
+ }
+
+ // Returns the input value x clamped to the range [min, max].
+ public static float clamp(float x, float min, float max) {
+ if (x > max) return max;
+ if (x < min) return min;
+ return x;
+ }
+
+ // Returns the input value x clamped to the range [min, max].
+ public static long clamp(long x, long min, long max) {
+ if (x > max) return max;
+ if (x < min) return min;
+ return x;
+ }
+
+ public static boolean isOpaque(int color) {
+ return color >>> 24 == 0xFF;
+ }
+
+ public static void swap(int[] array, int i, int j) {
+ int temp = array[i];
+ array[i] = array[j];
+ array[j] = temp;
+ }
+
+ /**
+ * A function thats returns a 64-bit crc for string
+ *
+ * @param in input string
+ * @return a 64-bit crc value
+ */
+ public static final long crc64Long(String in) {
+ if (in == null || in.length() == 0) {
+ return 0;
+ }
+ return crc64Long(getBytes(in));
+ }
+
+ static {
+ // http://bioinf.cs.ucl.ac.uk/downloads/crc64/crc64.c
+ long part;
+ for (int i = 0; i < 256; i++) {
+ part = i;
+ for (int j = 0; j < 8; j++) {
+ long x = ((int) part & 1) != 0 ? POLY64REV : 0;
+ part = (part >> 1) ^ x;
+ }
+ sCrcTable[i] = part;
+ }
+ }
+
+ public static final long crc64Long(byte[] buffer) {
+ long crc = INITIALCRC;
+ for (int k = 0, n = buffer.length; k < n; ++k) {
+ crc = sCrcTable[(((int) crc) ^ buffer[k]) & 0xff] ^ (crc >> 8);
+ }
+ return crc;
+ }
+
+ public static byte[] getBytes(String in) {
+ byte[] result = new byte[in.length() * 2];
+ int output = 0;
+ for (char ch : in.toCharArray()) {
+ result[output++] = (byte) (ch & 0xFF);
+ result[output++] = (byte) (ch >> 8);
+ }
+ return result;
+ }
+
+ public static void closeSilently(Closeable c) {
+ if (c == null) return;
+ try {
+ c.close();
+ } catch (IOException t) {
+ Log.w(TAG, "close fail ", t);
+ }
+ }
+
+ public static int compare(long a, long b) {
+ return a < b ? -1 : a == b ? 0 : 1;
+ }
+
+ public static int ceilLog2(float value) {
+ int i;
+ for (i = 0; i < 31; i++) {
+ if ((1 << i) >= value) break;
+ }
+ return i;
+ }
+
+ public static int floorLog2(float value) {
+ int i;
+ for (i = 0; i < 31; i++) {
+ if ((1 << i) > value) break;
+ }
+ return i - 1;
+ }
+
+ public static void closeSilently(ParcelFileDescriptor fd) {
+ try {
+ if (fd != null) fd.close();
+ } catch (Throwable t) {
+ Log.w(TAG, "fail to close", t);
+ }
+ }
+
+ public static void closeSilently(Cursor cursor) {
+ try {
+ if (cursor != null) cursor.close();
+ } catch (Throwable t) {
+ Log.w(TAG, "fail to close", t);
+ }
+ }
+
+ public static float interpolateAngle(
+ float source, float target, float progress) {
+ // interpolate the angle from source to target
+ // We make the difference in the range of [-179, 180], this is the
+ // shortest path to change source to target.
+ float diff = target - source;
+ if (diff < 0) diff += 360f;
+ if (diff > 180) diff -= 360f;
+
+ float result = source + diff * progress;
+ return result < 0 ? result + 360f : result;
+ }
+
+ public static float interpolateScale(
+ float source, float target, float progress) {
+ return source + progress * (target - source);
+ }
+
+ public static String ensureNotNull(String value) {
+ return value == null ? "" : value;
+ }
+
+ public static float parseFloatSafely(String content, float defaultValue) {
+ if (content == null) return defaultValue;
+ try {
+ return Float.parseFloat(content);
+ } catch (NumberFormatException e) {
+ return defaultValue;
+ }
+ }
+
+ public static int parseIntSafely(String content, int defaultValue) {
+ if (content == null) return defaultValue;
+ try {
+ return Integer.parseInt(content);
+ } catch (NumberFormatException e) {
+ return defaultValue;
+ }
+ }
+
+ public static boolean isNullOrEmpty(String exifMake) {
+ return TextUtils.isEmpty(exifMake);
+ }
+
+ public static void waitWithoutInterrupt(Object object) {
+ try {
+ object.wait();
+ } catch (InterruptedException e) {
+ Log.w(TAG, "unexpected interrupt: " + object);
+ }
+ }
+
+ public static boolean handleInterrruptedException(Throwable e) {
+ // A helper to deal with the interrupt exception
+ // If an interrupt detected, we will setup the bit again.
+ if (e instanceof InterruptedIOException
+ || e instanceof InterruptedException) {
+ Thread.currentThread().interrupt();
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * @return String with special XML characters escaped.
+ */
+ public static String escapeXml(String s) {
+ StringBuilder sb = new StringBuilder();
+ for (int i = 0, len = s.length(); i < len; ++i) {
+ char c = s.charAt(i);
+ switch (c) {
+ case '<': sb.append("&lt;"); break;
+ case '>': sb.append("&gt;"); break;
+ case '\"': sb.append("&quot;"); break;
+ case '\'': sb.append("&#039;"); break;
+ case '&': sb.append("&amp;"); break;
+ default: sb.append(c);
+ }
+ }
+ return sb.toString();
+ }
+
+ public static String getUserAgent(Context context) {
+ PackageInfo packageInfo;
+ try {
+ packageInfo = context.getPackageManager().getPackageInfo(context.getPackageName(), 0);
+ } catch (NameNotFoundException e) {
+ throw new IllegalStateException("getPackageInfo failed");
+ }
+ return String.format("%s/%s; %s/%s/%s/%s; %s/%s/%s",
+ packageInfo.packageName,
+ packageInfo.versionName,
+ Build.BRAND,
+ Build.DEVICE,
+ Build.MODEL,
+ Build.ID,
+ Build.VERSION.SDK_INT,
+ Build.VERSION.RELEASE,
+ Build.VERSION.INCREMENTAL);
+ }
+
+ public static String[] copyOf(String[] source, int newSize) {
+ String[] result = new String[newSize];
+ newSize = Math.min(source.length, newSize);
+ System.arraycopy(source, 0, result, 0, newSize);
+ return result;
+ }
+
+ // Mask information for debugging only. It returns <code>info.toString()</code> directly
+ // for debugging build (i.e., 'eng' and 'userdebug') and returns a mask ("****")
+ // in release build to protect the information (e.g. for privacy issue).
+ public static String maskDebugInfo(Object info) {
+ if (info == null) return null;
+ String s = info.toString();
+ int length = Math.min(s.length(), MASK_STRING.length());
+ return IS_DEBUG_BUILD ? s : MASK_STRING.substring(0, length);
+ }
+
+ // This method should be ONLY used for debugging.
+ public static void debug(String message, Object ... args) {
+ Log.v(DEBUG_TAG, String.format(message, args));
+ }
+} \ No newline at end of file