3 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
5 * This program and the accompanying materials are made available under the
6 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
7 * and is available at http://www.eclipse.org/legal/epl-v10.html
10 package org.opendaylight.controller.sal.packet;
12 import junit.framework.Assert;
14 import org.junit.Test;
16 public class BitBufferHelperTest {
19 public void testGetByte() {
20 byte[] data = { 100 };
21 Assert.assertTrue(BitBufferHelper.getByte(data) == 100);
25 public void testGetBits() throws Exception {
26 byte[] data = { 10, 12, 14, 20, 55, 69, 82, 97, 109, 117, 127, -50 };
29 bits = BitBufferHelper.getBits(data, 88, 8); //BYTE extraOffsetBits = extranumBits = 0
30 Assert.assertTrue(bits[0] == -50);
32 bits = BitBufferHelper.getBits(data, 8, 16); //Short
33 Assert.assertTrue(bits[0] == 12);
34 Assert.assertTrue(bits[1] == 14);
36 bits = BitBufferHelper.getBits(data, 32, 32); //Int
37 Assert.assertTrue(bits[0] == 55);
38 Assert.assertTrue(bits[1] == 69);
39 Assert.assertTrue(bits[2] == 82);
40 Assert.assertTrue(bits[3] == 97);
42 bits = BitBufferHelper.getBits(data, 16, 48); //Long
43 Assert.assertTrue(bits[0] == 14);
44 Assert.assertTrue(bits[1] == 20);
45 Assert.assertTrue(bits[2] == 55);
46 Assert.assertTrue(bits[3] == 69);
47 Assert.assertTrue(bits[4] == 82);
48 Assert.assertTrue(bits[5] == 97);
50 bits = BitBufferHelper.getBits(data, 40, 7); //BYTE extraOffsetBits = extranumBits != 0
51 Assert.assertTrue(bits[0] == 34);
53 bits = BitBufferHelper.getBits(data, 8, 13); //Short
54 Assert.assertTrue(bits[0] == 1);
55 Assert.assertTrue(bits[1] == -127);
57 bits = BitBufferHelper.getBits(data, 32, 28); //Int
58 Assert.assertTrue(bits[0] == 3);
59 Assert.assertTrue(bits[1] == 116);
60 Assert.assertTrue(bits[2] == 85);
61 Assert.assertTrue(bits[3] == 38);
63 bits = BitBufferHelper.getBits(data, 16, 41); //Long
64 Assert.assertTrue(bits[0] == 0);
65 Assert.assertTrue(bits[1] == 28);
66 Assert.assertTrue(bits[2] == 40);
67 Assert.assertTrue(bits[3] == 110);
68 Assert.assertTrue(bits[4] == -118);
69 Assert.assertTrue(bits[5] == -92);
71 bits = BitBufferHelper.getBits(data, 3, 7); //BYTE extraOffsetBits != 0; extranumBits == 0
72 Assert.assertTrue(bits[0] == 40);
74 bits = BitBufferHelper.getBits(data, 13, 16); //Short
75 Assert.assertTrue(bits[0] == -127);
76 Assert.assertTrue(bits[1] == -62);
78 bits = BitBufferHelper.getBits(data, 5, 32); //Int
79 Assert.assertTrue(bits[0] == 65);
80 Assert.assertTrue(bits[1] == -127);
81 Assert.assertTrue(bits[2] == -62);
82 Assert.assertTrue(bits[3] == -122);
84 bits = BitBufferHelper.getBits(data, 23, 48); //Long
85 Assert.assertTrue(bits[0] == 10);
86 Assert.assertTrue(bits[1] == 27);
87 Assert.assertTrue(bits[2] == -94);
88 Assert.assertTrue(bits[3] == -87);
89 Assert.assertTrue(bits[4] == 48);
90 Assert.assertTrue(bits[5] == -74);
92 bits = BitBufferHelper.getBits(data, 66, 9); //BYTE extraOffsetBits != 0; extranumBits != 0
93 Assert.assertTrue(bits[0] == 1);
94 Assert.assertTrue(bits[1] == 107);
96 bits = BitBufferHelper.getBits(data, 13, 15); //Short
97 Assert.assertTrue(bits[0] == 64);
98 Assert.assertTrue(bits[1] == -31);
100 bits = BitBufferHelper.getBits(data, 5, 29); //Int
101 Assert.assertTrue(bits[0] == 8);
102 Assert.assertTrue(bits[1] == 48);
103 Assert.assertTrue(bits[2] == 56);
104 Assert.assertTrue(bits[3] == 80);
106 bits = BitBufferHelper.getBits(data, 31, 43); //Long
107 Assert.assertTrue(bits[0] == 0);
108 Assert.assertTrue(bits[1] == -35);
109 Assert.assertTrue(bits[2] == 21);
110 Assert.assertTrue(bits[3] == 73);
111 Assert.assertTrue(bits[4] == -123);
112 Assert.assertTrue(bits[5] == -75);
114 bits = BitBufferHelper.getBits(data, 4, 12); //Short
115 Assert.assertTrue(bits[0] == 10);
116 Assert.assertTrue(bits[1] == 12);
118 byte[] data1 = { 0, 8 };
119 bits = BitBufferHelper.getBits(data1, 7, 9); //Short
120 Assert.assertTrue(bits[0] == 0);
121 Assert.assertTrue(bits[1] == 8);
123 byte[] data2 = { 2, 8 };
124 bits = BitBufferHelper.getBits(data2, 0, 7); //Short
125 Assert.assertTrue(bits[0] == 1);
127 bits = BitBufferHelper.getBits(data2, 7, 9); //Short
128 Assert.assertTrue(bits[0] == 0);
129 Assert.assertTrue(bits[1] == 8);
132 // [01101100][01100000]
135 public void testGetBytes() throws Exception {
136 byte data[] = { 108, 96, 125, -112, 5, 6, 108, 8, 9, 10, 11, 12, 13,
137 14, 15, 16, 17, 18, 19, 20, 21, 22 };
140 Assert.assertTrue(BitBufferHelper.getBits(data, 0, 8)[0] == 108);
141 Assert.assertTrue(BitBufferHelper.getBits(data, 8, 8)[0] == 96);
143 x = BitBufferHelper.getBits(data, 0, 10);
144 Assert.assertTrue(x[0] == 1);
145 Assert.assertTrue(x[1] == -79);
147 x = BitBufferHelper.getBits(data, 3, 8);
148 Assert.assertTrue(x[0] == 99);
149 //Assert.assertTrue(x[1] == 97);
154 public void testMSBMask() {
155 int numBits = 1; //MSB
156 int mask = BitBufferHelper.getMSBMask(numBits);
157 Assert.assertTrue(mask == 128);
160 mask = BitBufferHelper.getMSBMask(numBits);
161 Assert.assertTrue(mask == 255);
164 mask = BitBufferHelper.getMSBMask(numBits);
165 Assert.assertTrue(mask == 192);
169 public void testLSBMask() {
170 int numBits = 1; //LSB
171 int mask = BitBufferHelper.getLSBMask(numBits);
172 Assert.assertTrue(mask == 1);
175 mask = BitBufferHelper.getLSBMask(numBits);
176 Assert.assertTrue(mask == 7);
179 mask = BitBufferHelper.getLSBMask(numBits);
180 Assert.assertTrue(mask == 255);
184 public void testToByteArray() {
185 short sh = Short.MAX_VALUE;
186 byte[] data_sh = new byte[Byte.SIZE / 8];
187 data_sh = BitBufferHelper.toByteArray(sh);
188 Assert.assertTrue(data_sh[0] == 127);
189 Assert.assertTrue(data_sh[1] == -1);
191 short sh2 = Short.MIN_VALUE;
192 byte[] data_sh2 = new byte[Byte.SIZE / 8];
193 data_sh2 = BitBufferHelper.toByteArray(sh2);
194 Assert.assertTrue(data_sh2[0] == -128);
195 Assert.assertTrue(data_sh2[1] == 0);
198 byte[] data_sh3 = new byte[Byte.SIZE / 8];
199 data_sh3 = BitBufferHelper.toByteArray(sh3);
200 Assert.assertTrue(data_sh3[0] == 64);
201 Assert.assertTrue(data_sh3[1] == 0);
203 short sh4 = 146; //TCP headerlenflags - startoffset = 103
204 byte[] data_sh4 = new byte[Byte.SIZE / 8];
205 data_sh4 = BitBufferHelper.toByteArray(sh4);
206 Assert.assertTrue(data_sh4[0] == 0);
207 Assert.assertTrue(data_sh4[1] == -110);
209 short sh4_2 = 5000; //IPv4 Offset - startOffset = 51 (to 63)
210 byte[] data_sh4_2 = new byte[Byte.SIZE / 8];
211 data_sh4_2 = BitBufferHelper.toByteArray(sh4_2);
212 Assert.assertTrue(data_sh4_2[0] == 19);
213 Assert.assertTrue(data_sh4_2[1] == -120);
215 short sh4_3 = 5312; //numEndRestBits < numBitstoShiftBy
216 byte[] data_sh4_3 = new byte[Byte.SIZE / 8];
217 data_sh4_3 = BitBufferHelper.toByteArray(sh4_3);
218 Assert.assertTrue(data_sh4_3[0] == 20);
219 Assert.assertTrue(data_sh4_3[1] == -64);
221 int Int = Integer.MAX_VALUE;
222 byte[] data_Int = new byte[Integer.SIZE / 8];
223 data_Int = BitBufferHelper.toByteArray(Int);
224 Assert.assertTrue(data_Int[0] == 127);
225 Assert.assertTrue(data_Int[1] == -1);
226 Assert.assertTrue(data_Int[2] == -1);
227 Assert.assertTrue(data_Int[3] == -1);
229 int Int2 = Integer.MIN_VALUE;
230 byte[] data_Int2 = new byte[Integer.SIZE / 8];
231 data_Int2 = BitBufferHelper.toByteArray(Int2);
232 Assert.assertTrue(data_Int2[0] == -128);
233 Assert.assertTrue(data_Int2[1] == 0);
234 Assert.assertTrue(data_Int2[2] == 0);
235 Assert.assertTrue(data_Int2[3] == 0);
237 int Int3 = 1077952576;
238 byte[] data_Int3 = new byte[Integer.SIZE / 8];
239 data_Int3 = BitBufferHelper.toByteArray(Int3);
240 Assert.assertTrue(data_Int3[0] == 64);
241 Assert.assertTrue(data_Int3[1] == 64);
242 Assert.assertTrue(data_Int3[2] == 64);
243 Assert.assertTrue(data_Int3[3] == 64);
245 long Lng = Long.MAX_VALUE;
246 byte[] data_lng = new byte[Long.SIZE / 8];
247 data_lng = BitBufferHelper.toByteArray(Lng);
248 Assert.assertTrue(data_lng[0] == 127);
249 Assert.assertTrue(data_lng[1] == -1);
250 Assert.assertTrue(data_lng[2] == -1);
251 Assert.assertTrue(data_lng[3] == -1);
252 Assert.assertTrue(data_lng[4] == -1);
253 Assert.assertTrue(data_lng[5] == -1);
254 Assert.assertTrue(data_lng[6] == -1);
255 Assert.assertTrue(data_lng[7] == -1);
257 long Lng2 = Long.MIN_VALUE;
258 byte[] data_lng2 = new byte[Long.SIZE / 8];
259 data_lng2 = BitBufferHelper.toByteArray(Lng2);
260 Assert.assertTrue(data_lng2[0] == -128);
261 Assert.assertTrue(data_lng2[1] == 0);
262 Assert.assertTrue(data_lng2[2] == 0);
263 Assert.assertTrue(data_lng2[3] == 0);
264 Assert.assertTrue(data_lng2[4] == 0);
265 Assert.assertTrue(data_lng2[5] == 0);
266 Assert.assertTrue(data_lng2[6] == 0);
267 Assert.assertTrue(data_lng2[7] == 0);
269 byte B = Byte.MAX_VALUE;
270 byte[] data_B = new byte[Byte.SIZE / 8];
271 data_B = BitBufferHelper.toByteArray(B);
272 Assert.assertTrue(data_B[0] == 127);
274 byte B1 = Byte.MIN_VALUE;
275 byte[] data_B1 = new byte[Byte.SIZE / 8];
276 data_B1 = BitBufferHelper.toByteArray(B1);
277 Assert.assertTrue(data_B1[0] == -128);
280 byte[] data_B2 = new byte[Byte.SIZE / 8];
281 data_B2 = BitBufferHelper.toByteArray(B2);
282 Assert.assertTrue(data_B2[0] == 64);
285 byte[] data_B3 = new byte[Byte.SIZE / 8];
286 data_B3 = BitBufferHelper.toByteArray(B3);
287 Assert.assertTrue(data_B3[0] == 32);
292 public void testToByteArrayVariable() {
295 data_sh = BitBufferHelper.toByteArray(511, len);
296 Assert.assertTrue(data_sh[0] == (byte) 255);
297 Assert.assertTrue(data_sh[1] == (byte) 128);
299 data_sh = BitBufferHelper.toByteArray((int) 511, len);
300 Assert.assertTrue(data_sh[0] == (byte) 255);
301 Assert.assertTrue(data_sh[1] == (byte) 128);
303 data_sh = BitBufferHelper.toByteArray((long) 511, len);
304 Assert.assertTrue(data_sh[0] == (byte) 255);
305 Assert.assertTrue(data_sh[1] == (byte) 128);
309 public void testToInt() {
311 Assert.assertTrue(BitBufferHelper.toNumber(data) == 1);
313 byte data2[] = { 1, 1 };
314 Assert.assertTrue(BitBufferHelper.toNumber(data2) == 257);
316 byte data3[] = { 1, 1, 1 };
317 Assert.assertTrue(BitBufferHelper.toNumber(data3) == 65793);
321 public void testToLongGetter() {
322 byte data[] = { 1, 1 };
323 Assert.assertTrue(BitBufferHelper.getLong(data) == 257L);
327 public void testSetByte() throws Exception {
329 byte[] data = new byte[20];
332 BitBufferHelper.setByte(data, input, 0, Byte.SIZE);
333 Assert.assertTrue(data[0] == 125);
336 BitBufferHelper.setByte(data, input, 152, Byte.SIZE);
337 Assert.assertTrue(data[19] == 109);
341 public void testSetBytes() throws Exception {
342 byte[] input = { 0, 1 };
343 byte[] data = { 6, 0 };
345 BitBufferHelper.setBytes(data, input, 7, 9);
346 Assert.assertTrue(data[0] == 6);
347 Assert.assertTrue(data[1] == 1);
351 //INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
352 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001]*/
353 public void testInsertBits() throws Exception {
354 //CASE 1: startOffset%8 == 0 && numBits%8 == 0
355 byte inputdata[] = { 75, 110, 107, 80, 10, 12, 35, 100, 125, 65 };
359 byte data1[] = new byte[2];
362 BitBufferHelper.insertBits(data1, inputdata, startOffset, numBits);
363 Assert.assertTrue(data1[0] == 75);
364 Assert.assertTrue(data1[1] == 110);
366 byte data2[] = new byte[4];
369 BitBufferHelper.insertBits(data2, inputdata, startOffset, numBits);
370 Assert.assertTrue(data2[0] == 75);
371 Assert.assertTrue(data2[1] == 110);
372 Assert.assertTrue(data2[2] == 107);
373 Assert.assertTrue(data2[3] == 80);
375 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
376 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] // OUTPUT: [01001011] [01101000] = {75, 104}
377 byte data10[] = new byte[2];
380 BitBufferHelper.insertBits(data10, inputdata, startOffset, numBits);
381 Assert.assertTrue(data10[0] == 75);
382 Assert.assertTrue(data10[1] == 104);
384 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
385 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] // OUTPUT: [01001000] = {72}
386 byte data11[] = new byte[4];
389 BitBufferHelper.insertBits(data11, inputdata, startOffset, numBits);
390 Assert.assertTrue(data11[1] == 72);
392 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
393 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [01001011] [01101110] [01101000] = {75, 110, 105}
394 byte data12[] = new byte[4];
397 BitBufferHelper.insertBits(data12, inputdata, startOffset, numBits);
398 Assert.assertTrue(data12[0] == 75);
399 Assert.assertTrue(data12[1] == 110);
400 Assert.assertTrue(data12[2] == 106);
402 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
403 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [01001011] [01101110] [01100000] = {75, 110, 96}
404 byte data13[] = new byte[4];
407 BitBufferHelper.insertBits(data13, inputdata, startOffset, numBits);
408 Assert.assertTrue(data13[1] == 75);
409 Assert.assertTrue(data13[2] == 110);
410 Assert.assertTrue(data13[3] == 96);
412 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
413 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [01001011] [01101110] [01101011] [10100000]= {75, 110, 107, 80}
414 byte data14[] = new byte[4];
417 BitBufferHelper.insertBits(data14, inputdata, startOffset, numBits);
418 Assert.assertTrue(data14[0] == 75);
419 Assert.assertTrue(data14[1] == 110);
420 Assert.assertTrue(data14[2] == 107);
421 Assert.assertTrue(data14[3] == 80);
423 //CASE 3: startOffset%8 != 0, numBits%8 = 0
424 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
425 // [01001011] [01101110] [01101011] [10100000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00001001] [11000000] = {72, 96}
426 byte data16[] = new byte[5];
429 BitBufferHelper.insertBits(data16, inputdata, startOffset, numBits);
430 Assert.assertTrue(data16[0] == 9);
431 Assert.assertTrue(data16[1] == 96);
432 Assert.assertTrue(data16[2] == 0);
434 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
435 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
436 // OUTPUT: [00000100] [1011 0110] [1110 0000] = {4, -54, -96}
440 byte data17[] = new byte[5];
441 BitBufferHelper.insertBits(data17, inputdata, startOffset, numBits);
442 Assert.assertTrue(data17[0] == 9);
443 Assert.assertTrue(data17[1] == 109);
444 Assert.assertTrue(data17[2] == -64);
445 Assert.assertTrue(data17[3] == 0);
447 // INPUT: {79, 110, 111}
448 // = [01001111] [01101110] [01101111]
449 //OUTPUT: [0000 1001] [1110 1101] [110 00000] = {9, -19, -64}
450 byte data18[] = new byte[5];
451 byte inputdata3[] = { 79, 110, 111 };
454 BitBufferHelper.insertBits(data18, inputdata3, startOffset, numBits);
455 Assert.assertTrue(data18[0] == 9);
456 Assert.assertTrue(data18[1] == -19);
457 Assert.assertTrue(data18[2] == -64);
459 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
460 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
461 // OUTPUT: [0000 1001] [0110 1101] [1100 1101] [0110 1010] [0000 0001] = {9, 109, -51, 106, 0}
465 byte data19[] = new byte[5];
466 BitBufferHelper.insertBits(data19, inputdata, startOffset, numBits);
467 Assert.assertTrue(data19[0] == 9);
468 Assert.assertTrue(data19[1] == 109);
469 Assert.assertTrue(data19[2] == -51);
470 Assert.assertTrue(data19[3] == 106);
471 Assert.assertTrue(data19[4] == 0);
473 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
474 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
475 // OUTPUT: data[4, 5, 6] = [0 010 0101] [1 011 0111] [0 000 0000] = {37, -73, 0}
478 byte data20[] = new byte[7];
479 BitBufferHelper.insertBits(data20, inputdata, startOffset, numBits);
480 Assert.assertTrue(data20[4] == 37);
481 Assert.assertTrue(data20[5] == -73);
482 Assert.assertTrue(data20[6] == 0);
484 //CASE 4: extranumBits != 0 AND extraOffsetBits != 0
485 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
486 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
487 // OUTPUT: [0000 1001] [0100 0000] = {9, 96}
490 byte data21[] = new byte[7];
491 BitBufferHelper.insertBits(data21, inputdata, startOffset, numBits);
492 Assert.assertTrue(data21[0] == 9);
493 Assert.assertTrue(data21[1] == 64);
494 Assert.assertTrue(data21[2] == 0);
496 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
497 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
498 // OUTPUT: data = [00000 010] [01011 011] [01110 000] = {37, -73, 0}
501 byte data22[] = new byte[7];
502 BitBufferHelper.insertBits(data22, inputdata, startOffset, numBits);
503 Assert.assertTrue(data22[0] == 2);
504 Assert.assertTrue(data22[1] == 91);
505 Assert.assertTrue(data22[2] == 112);
507 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
508 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
509 // OUTPUT: [0000 1001] [0110 1101] [110 01101] [01 00000] = {9, 109, -51, 64}
512 byte data23[] = new byte[7];
513 BitBufferHelper.insertBits(data23, inputdata, startOffset, numBits);
514 Assert.assertTrue(data23[0] == 9);
515 Assert.assertTrue(data23[1] == 109);
516 Assert.assertTrue(data23[2] == -51);
517 Assert.assertTrue(data23[3] == 64);
519 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
520 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
521 // OUTPUT: [0000 1001] [0110 1101] = {9, 109}
524 byte data24[] = new byte[7];
525 BitBufferHelper.insertBits(data24, inputdata, startOffset, numBits);
526 Assert.assertTrue(data24[0] == 9);
527 Assert.assertTrue(data24[1] == 109);
528 Assert.assertTrue(data24[2] == 0);
530 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
531 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
532 // OUTPUT: [0000 0100] [1011 0110] [1110 0110] = {4, -74, -26}
535 byte data25[] = new byte[7];
536 BitBufferHelper.insertBits(data25, inputdata, startOffset, numBits);
537 Assert.assertTrue(data25[0] == 4);
538 Assert.assertTrue(data25[1] == -74);
539 Assert.assertTrue(data25[2] == -26);
540 Assert.assertTrue(data25[3] == -0);
542 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
543 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
544 // OUTPUT: [0000 0010] [0101 1011] = {0, 2, 91, 0}
547 byte data26[] = new byte[7];
548 BitBufferHelper.insertBits(data26, inputdata, startOffset, numBits);
549 Assert.assertTrue(data26[0] == 0);
550 Assert.assertTrue(data26[1] == 2);
551 Assert.assertTrue(data26[2] == 91);
552 Assert.assertTrue(data26[3] == 0);
554 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
555 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
556 // OUTPUT: [000 01001] [011 01101] [110 0 0000] = {9, 109, -64, 0}
559 byte data27[] = new byte[7];
560 BitBufferHelper.insertBits(data27, inputdata, startOffset, numBits);
561 Assert.assertTrue(data27[0] == 9);
562 Assert.assertTrue(data27[1] == 109);
563 Assert.assertTrue(data27[2] == -64);
564 Assert.assertTrue(data27[3] == 0);
566 // INPUT: {75, 110, 107, 80, 10, 12, 35, 100, 125, 65} =
567 // [01001011] [01101110] [01101011] [01010000] [00001010] [00001100] [00100011] [01100100] [11111101] [01000001] //OUTPUT: [00000000] [00000100] [10110110] [11100000]= {0, 4, -54, -96}
568 // OUTPUT: [00 000000] [00 000000] [00 010010] [11 011011] [10 011010] [11 010100] [0000 0000] = {0, 0, 18, -37,-102,-44,0}
571 byte data28[] = new byte[7];
572 BitBufferHelper.insertBits(data28, inputdata, startOffset, numBits);
573 Assert.assertTrue(data28[0] == 0);
574 Assert.assertTrue(data28[1] == 0);
575 Assert.assertTrue(data28[2] == 18);
576 Assert.assertTrue(data28[3] == -37);
577 Assert.assertTrue(data28[4] == -102);
578 Assert.assertTrue(data28[5] == -44);
579 Assert.assertTrue(data28[6] == 0);
584 public void testGetShort() throws Exception {
585 byte data[] = new byte[2];
588 int length = 9; // num bits
589 Assert.assertTrue(BitBufferHelper.getShort(data, length) == 264);
593 short result = BitBufferHelper.getShort(data, length);
594 Assert.assertTrue(result == 8);
598 result = BitBufferHelper.getShort(data, length);
599 Assert.assertTrue(result == 47);
601 //[0000 0001] [0001 0100] [0110 0100]
602 byte[] data1 = new byte[2];
604 data1[1] = 20; //data1[2] = 100;
606 result = BitBufferHelper.getShort(data1, length);
607 Assert.assertTrue(result == 276);
609 byte[] data2 = new byte[2];
611 data2[1] = 99; //data2[2] = 100;
613 result = BitBufferHelper.getShort(data2, length);
614 Assert.assertTrue(result == 99);
616 byte[] data3 = { 100, 50 };
617 result = BitBufferHelper.getShort(data3);
618 Assert.assertTrue(result == 25650);
622 public void testToIntVarLength() throws Exception {
623 byte data[] = { (byte) 255, (byte) 128 };
624 int length = 9; // num bits
625 Assert.assertTrue(BitBufferHelper.getInt(data, length) == 384);
627 byte data2[] = { 0, 8 };
628 Assert.assertTrue(BitBufferHelper.getInt(data2, 9) == 8);
630 byte data3[] = { 1, 1, 1 };
631 Assert.assertTrue(BitBufferHelper.getInt(data3) == 65793);
633 byte data4[] = { 1, 1, 1 };
634 Assert.assertTrue(BitBufferHelper.getInt(data4) == 65793);
636 byte data5[] = { 1, 1 };
637 Assert.assertTrue(BitBufferHelper.getInt(data5) == 257);
642 public void testShiftBitstoLSB() {
643 byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
645 byte[] data2 = { 8, 9, 10 };
646 byte[] shiftedBytes2 = BitBufferHelper.shiftBitsToLSB(data2, 11);
648 Assert.assertTrue(shiftedBytes2[0] == 0);
649 Assert.assertTrue(shiftedBytes2[1] == 64);
650 Assert.assertTrue(shiftedBytes2[2] == 72);
652 byte[] shiftedBytes = BitBufferHelper.shiftBitsToLSB(data, 49);
654 Assert.assertTrue(shiftedBytes[0] == 0);
655 Assert.assertTrue(shiftedBytes[1] == 2);
656 Assert.assertTrue(shiftedBytes[2] == 4);
657 Assert.assertTrue(shiftedBytes[3] == 6);
658 Assert.assertTrue(shiftedBytes[4] == 8);
659 Assert.assertTrue(shiftedBytes[5] == 10);
660 Assert.assertTrue(shiftedBytes[6] == 12);
661 Assert.assertTrue(shiftedBytes[7] == 14);
662 Assert.assertTrue(shiftedBytes[8] == 16);
663 Assert.assertTrue(shiftedBytes[9] == 18);
665 byte[] data1 = { 1, 2, 3 };
666 byte[] shiftedBytes1 = BitBufferHelper.shiftBitsToLSB(data1, 18);
667 Assert.assertTrue(shiftedBytes1[0] == 0);
668 Assert.assertTrue(shiftedBytes1[1] == 4);
669 Assert.assertTrue(shiftedBytes1[2] == 8);
674 public void testShiftBitstoLSBMSB() {
675 byte[] data = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
677 byte[] clone = BitBufferHelper.shiftBitsToMSB(BitBufferHelper
678 .shiftBitsToLSB(data, 72), 72);
680 Assert.assertTrue(clone[0] == 1);
681 Assert.assertTrue(clone[1] == 2);
682 Assert.assertTrue(clone[2] == 3);
683 Assert.assertTrue(clone[3] == 4);
684 Assert.assertTrue(clone[4] == 5);
685 Assert.assertTrue(clone[5] == 6);
686 Assert.assertTrue(clone[6] == 7);
687 Assert.assertTrue(clone[7] == 8);
688 Assert.assertTrue(clone[8] == 9);
689 Assert.assertTrue(clone[9] == 0);