diff options
Diffstat (limited to 'guava/src/com/google/common/primitives/UnsignedInts.java')
| -rw-r--r-- | guava/src/com/google/common/primitives/UnsignedInts.java | 82 |
1 files changed, 24 insertions, 58 deletions
diff --git a/guava/src/com/google/common/primitives/UnsignedInts.java b/guava/src/com/google/common/primitives/UnsignedInts.java index 762b841..222d9f3 100644 --- a/guava/src/com/google/common/primitives/UnsignedInts.java +++ b/guava/src/com/google/common/primitives/UnsignedInts.java @@ -1,11 +1,11 @@ /* * Copyright (C) 2011 The Guava Authors - * + * * 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 @@ -17,30 +17,26 @@ package com.google.common.primitives; import static com.google.common.base.Preconditions.checkArgument; import static com.google.common.base.Preconditions.checkNotNull; -import com.google.common.annotations.Beta; -import com.google.common.annotations.GwtCompatible; - import java.util.Arrays; import java.util.Comparator; +import com.google.common.annotations.Beta; +import com.google.common.annotations.GwtCompatible; + /** * Static utility methods pertaining to {@code int} primitives that interpret values as * <i>unsigned</i> (that is, any negative value {@code x} is treated as the positive value * {@code 2^32 + x}). The methods for which signedness is not an issue are in {@link Ints}, as well * as signed versions of methods for which signedness is an issue. - * + * * <p>In addition, this class provides several static methods for converting an {@code int} to a * {@code String} and a {@code String} to an {@code int} that treat the {@code int} as an unsigned * number. - * + * * <p>Users of these utilities must be <i>extremely careful</i> not to mix up signed and unsigned * {@code int} values. When possible, it is recommended that the {@link UnsignedInteger} wrapper * class be used, at a small efficiency penalty, to enforce the distinction in the type system. - * - * <p>See the Guava User Guide article on <a href= - * "http://code.google.com/p/guava-libraries/wiki/PrimitivesExplained#Unsigned_support"> - * unsigned primitive utilities</a>. - * + * * @author Louis Wasserman * @since 11.0 */ @@ -58,7 +54,7 @@ public final class UnsignedInts { /** * Compares the two specified {@code int} values, treating them as unsigned values between * {@code 0} and {@code 2^32 - 1} inclusive. - * + * * @param a the first unsigned {@code int} to compare * @param b the second unsigned {@code int} to compare * @return a negative value if {@code a} is less than {@code b}; a positive value if {@code a} is @@ -77,7 +73,7 @@ public final class UnsignedInts { /** * Returns the least value present in {@code array}, treating values as unsigned. - * + * * @param array a <i>nonempty</i> array of unsigned {@code int} values * @return the value present in {@code array} that is less than or equal to every other value in * the array according to {@link #compare} @@ -97,7 +93,7 @@ public final class UnsignedInts { /** * Returns the greatest value present in {@code array}, treating values as unsigned. - * + * * @param array a <i>nonempty</i> array of unsigned {@code int} values * @return the value present in {@code array} that is greater than or equal to every other value * in the array according to {@link #compare} @@ -118,7 +114,7 @@ public final class UnsignedInts { /** * Returns a string containing the supplied unsigned {@code int} values separated by * {@code separator}. For example, {@code join("-", 1, 2, 3)} returns the string {@code "1-2-3"}. - * + * * @param separator the text that should appear between consecutive values in the resulting * string (but not at the start or end) * @param array an array of unsigned {@code int} values, possibly empty @@ -131,7 +127,7 @@ public final class UnsignedInts { // For pre-sizing a builder, just get the right order of magnitude StringBuilder builder = new StringBuilder(array.length * 5); - builder.append(toString(array[0])); + builder.append(array[0]); for (int i = 1; i < array.length; i++) { builder.append(separator).append(toString(array[i])); } @@ -143,10 +139,10 @@ public final class UnsignedInts { * That is, it compares, using {@link #compare(int, int)}), the first pair of values that follow * any common prefix, or when one array is a prefix of the other, treats the shorter array as the * lesser. For example, {@code [] < [1] < [1, 2] < [2] < [1 << 31]}. - * + * * <p>The returned comparator is inconsistent with {@link Object#equals(Object)} (since arrays * support only identity equality), but it is consistent with {@link Arrays#equals(int[], int[])}. - * + * * @see <a href="http://en.wikipedia.org/wiki/Lexicographical_order"> Lexicographical order * article at Wikipedia</a> */ @@ -172,7 +168,7 @@ public final class UnsignedInts { /** * Returns dividend / divisor, where the dividend and divisor are treated as unsigned 32-bit * quantities. - * + * * @param dividend the dividend (numerator) * @param divisor the divisor (denominator) * @throws ArithmeticException if divisor is 0 @@ -184,7 +180,7 @@ public final class UnsignedInts { /** * Returns dividend % divisor, where the dividend and divisor are treated as unsigned 32-bit * quantities. - * + * * @param dividend the dividend (numerator) * @param divisor the divisor (denominator) * @throws ArithmeticException if divisor is 0 @@ -194,39 +190,11 @@ public final class UnsignedInts { } /** - * Returns the unsigned {@code int} value represented by the given string. - * - * Accepts a decimal, hexadecimal, or octal number given by specifying the following prefix: - * - * <ul> - * <li>{@code 0x}<i>HexDigits</i> - * <li>{@code 0X}<i>HexDigits</i> - * <li>{@code #}<i>HexDigits</i> - * <li>{@code 0}<i>OctalDigits</i> - * </ul> - * - * @throws NumberFormatException if the string does not contain a valid unsigned {@code int} value - * @since 13.0 - */ - public static int decode(String stringValue) { - ParseRequest request = ParseRequest.fromString(stringValue); - - try { - return parseUnsignedInt(request.rawValue, request.radix); - } catch (NumberFormatException e) { - NumberFormatException decodeException = - new NumberFormatException("Error parsing value: " + stringValue); - decodeException.initCause(e); - throw decodeException; - } - } - - /** * Returns the unsigned {@code int} value represented by the given decimal string. - * - * @throws NumberFormatException if the string does not contain a valid unsigned {@code int} value - * @throws NullPointerException if {@code s} is null - * (in contrast to {@link Integer#parseInt(String)}) + * + * @throws NumberFormatException if the string does not contain a valid unsigned integer, or if + * the value represented is too large to fit in an unsigned {@code int}. + * @throws NullPointerException if {@code s} is null */ public static int parseUnsignedInt(String s) { return parseUnsignedInt(s, 10); @@ -234,14 +202,12 @@ public final class UnsignedInts { /** * Returns the unsigned {@code int} value represented by a string with the given radix. - * + * * @param string the string containing the unsigned integer representation to be parsed. * @param radix the radix to use while parsing {@code s}; must be between * {@link Character#MIN_RADIX} and {@link Character#MAX_RADIX}. * @throws NumberFormatException if the string does not contain a valid unsigned {@code int}, or * if supplied radix is invalid. - * @throws NullPointerException if {@code s} is null - * (in contrast to {@link Integer#parseInt(String)}) */ public static int parseUnsignedInt(String string, int radix) { checkNotNull(string); @@ -263,7 +229,7 @@ public final class UnsignedInts { /** * Returns a string representation of {@code x} for the given radix, where {@code x} is treated * as unsigned. - * + * * @param x the value to convert to a string. * @param radix the radix to use while working with {@code x} * @throws IllegalArgumentException if {@code radix} is not between {@link Character#MIN_RADIX} |