mirror of https://github.com/lukechilds/node.git
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
100 lines
2.8 KiB
100 lines
2.8 KiB
/*
|
|
* Tests to verify we're reading in signed integers correctly
|
|
*/
|
|
var ASSERT = require('assert');
|
|
|
|
/*
|
|
* Test 8 bit signed integers
|
|
*/
|
|
function test8() {
|
|
var data = new Buffer(4);
|
|
|
|
data[0] = 0x23;
|
|
ASSERT.equal(0x23, data.readInt8(0, 'big'));
|
|
ASSERT.equal(0x23, data.readInt8(0, 'little'));
|
|
|
|
data[0] = 0xff;
|
|
ASSERT.equal(-1, data.readInt8(0, 'big'));
|
|
ASSERT.equal(-1, data.readInt8(0, 'little'));
|
|
|
|
data[0] = 0x87;
|
|
data[1] = 0xab;
|
|
data[2] = 0x7c;
|
|
data[3] = 0xef;
|
|
ASSERT.equal(-121, data.readInt8(0, 'big'));
|
|
ASSERT.equal(-85, data.readInt8(1, 'big'));
|
|
ASSERT.equal(124, data.readInt8(2, 'big'));
|
|
ASSERT.equal(-17, data.readInt8(3, 'big'));
|
|
ASSERT.equal(-121, data.readInt8(0, 'little'));
|
|
ASSERT.equal(-85, data.readInt8(1, 'little'));
|
|
ASSERT.equal(124, data.readInt8(2, 'little'));
|
|
ASSERT.equal(-17, data.readInt8(3, 'little'));
|
|
}
|
|
|
|
|
|
function test16() {
|
|
var buffer = new Buffer(6);
|
|
buffer[0] = 0x16;
|
|
buffer[1] = 0x79;
|
|
ASSERT.equal(0x1679, buffer.readInt16(0, 'big'));
|
|
ASSERT.equal(0x7916, buffer.readInt16(0, 'little'));
|
|
|
|
buffer[0] = 0xff;
|
|
buffer[1] = 0x80;
|
|
ASSERT.equal(-128, buffer.readInt16(0, 'big'));
|
|
ASSERT.equal(-32513, buffer.readInt16(0, 'little'));
|
|
|
|
/* test offset with weenix */
|
|
buffer[0] = 0x77;
|
|
buffer[1] = 0x65;
|
|
buffer[2] = 0x65;
|
|
buffer[3] = 0x6e;
|
|
buffer[4] = 0x69;
|
|
buffer[5] = 0x78;
|
|
ASSERT.equal(0x7765, buffer.readInt16(0, 'big'));
|
|
ASSERT.equal(0x6565, buffer.readInt16(1, 'big'));
|
|
ASSERT.equal(0x656e, buffer.readInt16(2, 'big'));
|
|
ASSERT.equal(0x6e69, buffer.readInt16(3, 'big'));
|
|
ASSERT.equal(0x6978, buffer.readInt16(4, 'big'));
|
|
ASSERT.equal(0x6577, buffer.readInt16(0, 'little'));
|
|
ASSERT.equal(0x6565, buffer.readInt16(1, 'little'));
|
|
ASSERT.equal(0x6e65, buffer.readInt16(2, 'little'));
|
|
ASSERT.equal(0x696e, buffer.readInt16(3, 'little'));
|
|
ASSERT.equal(0x7869, buffer.readInt16(4, 'little'));
|
|
}
|
|
|
|
|
|
function test32() {
|
|
var buffer = new Buffer(6);
|
|
buffer[0] = 0x43;
|
|
buffer[1] = 0x53;
|
|
buffer[2] = 0x16;
|
|
buffer[3] = 0x79;
|
|
ASSERT.equal(0x43531679, buffer.readInt32(0, 'big'));
|
|
ASSERT.equal(0x79165343, buffer.readInt32(0, 'little'));
|
|
|
|
buffer[0] = 0xff;
|
|
buffer[1] = 0xfe;
|
|
buffer[2] = 0xef;
|
|
buffer[3] = 0xfa;
|
|
ASSERT.equal(-69638, buffer.readInt32(0, 'big'));
|
|
ASSERT.equal(-84934913, buffer.readInt32(0, 'little'));
|
|
|
|
buffer[0] = 0x42;
|
|
buffer[1] = 0xc3;
|
|
buffer[2] = 0x95;
|
|
buffer[3] = 0xa9;
|
|
buffer[4] = 0x36;
|
|
buffer[5] = 0x17;
|
|
ASSERT.equal(0x42c395a9, buffer.readInt32(0, 'big'));
|
|
ASSERT.equal(-1013601994, buffer.readInt32(1, 'big'));
|
|
ASSERT.equal(-1784072681, buffer.readInt32(2, 'big'));
|
|
ASSERT.equal(-1449802942, buffer.readInt32(0, 'little'));
|
|
ASSERT.equal(917083587, buffer.readInt32(1, 'little'));
|
|
ASSERT.equal(389458325, buffer.readInt32(2, 'little'));
|
|
}
|
|
|
|
|
|
test8();
|
|
test16();
|
|
test32();
|
|
|