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19 package gcc.util;
20
21 public class ArrayUtil
22 {
23 public static final boolean[] EMPTY_BOOLEAN_ARRAY =
24 {
25 }
26 ;
27 public static final char[] EMPTY_CHAR_ARRAY =
28 {
29 }
30 ;
31 public static final byte[] EMPTY_BYTE_ARRAY =
32 {
33 }
34 ;
35 public static final short[] EMPTY_SHORT_ARRAY =
36 {
37 }
38 ;
39 public static final int[] EMPTY_INT_ARRAY =
40 {
41 }
42 ;
43 public static final long[] EMPTY_LONG_ARRAY =
44 {
45 }
46 ;
47 public static final float[] EMPTY_FLOAT_ARRAY =
48 {
49 }
50 ;
51 public static final double[] EMPTY_DOUBLE_ARRAY =
52 {
53 }
54 ;
55 public static final Class[] EMPTY_CLASS_ARRAY =
56 {
57 }
58 ;
59 public static final Object[] EMPTY_OBJECT_ARRAY =
60 {
61 }
62 ;
63 public static final String[] EMPTY_STRING_ARRAY =
64 {
65 }
66 ;
67
68 public static byte[] copy(byte[] x)
69 {
70 return getBytes(x, 0, x.length);
71 }
72
73 public static byte[] concat(byte[] x, byte[] y)
74 {
75 byte[] z = new byte[x.length + y.length];
76 System.arraycopy(x, 0, z, 0, x.length);
77 System.arraycopy(y, 0, z, x.length, y.length);
78 return z;
79 }
80
81 public static byte[] getBytes(byte[] x, int offset, int length)
82 {
83 byte[] y = new byte[length];
84 System.arraycopy(x, offset, y, 0, length);
85 return y;
86 }
87
88 public static int indexOf(byte[] x, byte b)
89 {
90 return indexOf(x, b, 0);
91 }
92
93 public static int indexOf(byte[] x, byte b, int startOffset)
94 {
95 int n = x.length;
96 for (int i = startOffset; i < n; i++)
97 {
98 if (x[i] == b)
99 {
100 return i;
101 }
102 }
103 return -1;
104 }
105
106 public static boolean[] newBooleanArray(int size, boolean[] init)
107 {
108 boolean[] array = new boolean[size];
109 if (init != null)
110 {
111 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
112 }
113 return array;
114 }
115
116 public static char[] newCharArray(int size, char[] init)
117 {
118 char[] array = new char[size];
119 if (init != null)
120 {
121 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
122 }
123 return array;
124 }
125
126 public static byte[] newByteArray(int size, byte[] init)
127 {
128 byte[] array = new byte[size];
129 if (init != null)
130 {
131 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
132 }
133 return array;
134 }
135
136 public static short[] newShortArray(int size, short[] init)
137 {
138 short[] array = new short[size];
139 if (init != null)
140 {
141 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
142 }
143 return array;
144 }
145
146 public static int[] newIntArray(int size, int[] init)
147 {
148 int[] array = new int[size];
149 if (init != null)
150 {
151 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
152 }
153 return array;
154 }
155
156 public static long[] newLongArray(int size, long[] init)
157 {
158 long[] array = new long[size];
159 if (init != null)
160 {
161 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
162 }
163 return array;
164 }
165
166 public static float[] newFloatArray(int size, float[] init)
167 {
168 float[] array = new float[size];
169 if (init != null)
170 {
171 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
172 }
173 return array;
174 }
175
176 public static double[] newDoubleArray(int size, double[] init)
177 {
178 double[] array = new double[size];
179 if (init != null)
180 {
181 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
182 }
183 return array;
184 }
185
186 public static Object[] newObjectArray(int size, Object[] init)
187 {
188 Object[] array = new Object[size];
189 if (init != null)
190 {
191 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
192 }
193 return array;
194 }
195
196 public static Object[] newObjectArray(int size, Object[] init, Class type)
197 {
198 Object[] array = (Object[])java.lang.reflect.Array.newInstance(type, size);
199 if (init != null)
200 {
201 System.arraycopy(init, 0, array, 0, Math.min(size, init.length));
202 }
203 return array;
204 }
205 }
206 |
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