1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
|
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
var common = require('../common');
var assert = require('assert');
// minimum string size to overflow into external string space
var EXTERN_APEX = 0xFBEE9;
// manually controlled string for checking binary output
var ucs2_control = 'a\u0000';
var write_str = 'a';
// first do basic checks
var b = new Buffer(write_str, 'ucs2');
var c = b.toString('binary');
assert.equal(b[0], 0x61);
assert.equal(b[1], 0);
assert.equal(ucs2_control, c);
// grow the strings to proper length
while (write_str.length <= EXTERN_APEX) {
write_str += write_str;
ucs2_control += ucs2_control;
}
write_str += write_str.substr(0, EXTERN_APEX - write_str.length);
ucs2_control += ucs2_control.substr(0, EXTERN_APEX * 2 - ucs2_control.length);
// check resultant buffer and output string
var b = new Buffer(write_str, 'ucs2');
// check fist Buffer created from write string
for (var i = 0; i < b.length; i += 2) {
assert.equal(b[i], 0x61);
assert.equal(b[i + 1], 0);
}
// create another string to create an external string
var b_bin = b.toString('binary');
var b_ucs = b.toString('ucs2');
// check control against external binary string
assert.equal(ucs2_control, b_bin);
// create buffer copy from external
var c_bin = new Buffer(b_bin, 'binary');
var c_ucs = new Buffer(b_ucs, 'ucs2');
// make sure they're the same length
assert.equal(c_bin.length, c_ucs.length);
// make sure Buffers from externals are the same
for (var i = 0; i < c_bin.length; i++) {
assert.equal(c_bin[i], c_ucs[i], c_bin[i] + ' == ' + c_ucs[i] +
' : index ' + i);
}
// check resultant strings
assert.equal(c_bin.toString('ucs2'), c_ucs.toString('ucs2'));
assert.equal(c_bin.toString('binary'), ucs2_control);
assert.equal(c_ucs.toString('binary'), ucs2_control);
// now let's test BASE64 and HEX ecoding/decoding
var RADIOS = 2;
var PRE_HALF_APEX = Math.ceil(EXTERN_APEX / 2) - RADIOS;
var PRE_3OF4_APEX = Math.ceil((EXTERN_APEX / 4) * 3) - RADIOS;
(function () {
for (var j = 0; j < RADIOS * 2; j += 1) {
var datum = b;
var slice = datum.slice(0, PRE_HALF_APEX + j);
var slice2 = datum.slice(0, PRE_HALF_APEX + j + 2);
var pumped_string = slice.toString('hex');
var pumped_string2 = slice2.toString('hex');
var decoded = new Buffer(pumped_string, 'hex');
var metadata = "\nEXTERN_APEX=1031913 - pumped_string.length="
metadata += pumped_string.length + '\n';
// the string are the same?
for (var k = 0; k < pumped_string.length; ++k) {
assert.equal(pumped_string[k], pumped_string2[k],
metadata + 'chars should be the same at ' + k);
}
// the recoded buffer is the same?
for (var i = 0; i < decoded.length; ++i) {
assert.equal(datum[i], decoded[i],
metadata + 'bytes should be the same at ' + i);
}
}
})();
(function () {
for (var j = 0; j < RADIOS * 2; j += 1) {
var datum = b;
var slice = datum.slice(0, PRE_3OF4_APEX + j);
var slice2 = datum.slice(0, PRE_3OF4_APEX + j + 2);
var pumped_string = slice.toString('base64');
var pumped_string2 = slice2.toString('base64');
var decoded = new Buffer(pumped_string, 'base64');
var metadata = "\nEXTERN_APEX=1031913 - data=" + slice.length
metadata += " pumped_string.length=" + pumped_string.length + '\n';
// the string are the same?
for (var k = 0; k < pumped_string.length - 3; ++k) {
assert.equal(pumped_string[k], pumped_string2[k],
metadata + 'chars should be the same for two slices at '
+ k + ' ' + pumped_string[k] + ' ' + pumped_string2[k]);
}
// the recoded buffer is the same?
for (var i = 0; i < decoded.length; ++i) {
assert.equal(datum[i], decoded[i],
metadata + 'bytes should be the same at ' + i);
}
}
})();
|
