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
135
136
137
138
// Ported from js-yaml v3.13.1:// Copyright 2011-2015 by Vitaly Puzrin. All rights reserved. MIT license.// https://github.com/nodeca/js-yaml/commit/665aadda42349dcae869f12040d9b10ef18d12da// Copyright 2018-2022 the Deno authors. All rights reserved. MIT license.import { Type } from "../type.ts";import type { Any } from "../utils.ts";import { Buffer } from "../../../io/buffer.ts";
// [ 64, 65, 66 ] -> [ padding, CR, LF ]const BASE64_MAP =  "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=\n\r";
function resolveYamlBinary(data: Any): boolean {  if (data === null) return false;
  let code: number;  let bitlen = 0;  const max = data.length;  const map = BASE64_MAP;
  // Convert one by one.  for (let idx = 0; idx < max; idx++) {    code = map.indexOf(data.charAt(idx));
    // Skip CR/LF    if (code > 64) continue;
    // Fail on illegal characters    if (code < 0) return false;
    bitlen += 6;  }
  // If there are any bits left, source was corrupted  return bitlen % 8 === 0;}
function constructYamlBinary(data: string): Buffer {  // remove CR/LF & padding to simplify scan  const input = data.replace(/[\r\n=]/g, "");  const max = input.length;  const map = BASE64_MAP;
  // Collect by 6*4 bits (3 bytes)
  const result = [];  let bits = 0;  for (let idx = 0; idx < max; idx++) {    if (idx % 4 === 0 && idx) {      result.push((bits >> 16) & 0xff);      result.push((bits >> 8) & 0xff);      result.push(bits & 0xff);    }
    bits = (bits << 6) | map.indexOf(input.charAt(idx));  }
  // Dump tail
  const tailbits = (max % 4) * 6;
  if (tailbits === 0) {    result.push((bits >> 16) & 0xff);    result.push((bits >> 8) & 0xff);    result.push(bits & 0xff);  } else if (tailbits === 18) {    result.push((bits >> 10) & 0xff);    result.push((bits >> 2) & 0xff);  } else if (tailbits === 12) {    result.push((bits >> 4) & 0xff);  }
  return new Buffer(new Uint8Array(result));}
function representYamlBinary(object: Uint8Array): string {  const max = object.length;  const map = BASE64_MAP;
  // Convert every three bytes to 4 ASCII characters.
  let result = "";  let bits = 0;  for (let idx = 0; idx < max; idx++) {    if (idx % 3 === 0 && idx) {      result += map[(bits >> 18) & 0x3f];      result += map[(bits >> 12) & 0x3f];      result += map[(bits >> 6) & 0x3f];      result += map[bits & 0x3f];    }
    bits = (bits << 8) + object[idx];  }
  // Dump tail
  const tail = max % 3;
  if (tail === 0) {    result += map[(bits >> 18) & 0x3f];    result += map[(bits >> 12) & 0x3f];    result += map[(bits >> 6) & 0x3f];    result += map[bits & 0x3f];  } else if (tail === 2) {    result += map[(bits >> 10) & 0x3f];    result += map[(bits >> 4) & 0x3f];    result += map[(bits << 2) & 0x3f];    result += map[64];  } else if (tail === 1) {    result += map[(bits >> 2) & 0x3f];    result += map[(bits << 4) & 0x3f];    result += map[64];    result += map[64];  }
  return result;}
function isBinary(obj: Any): obj is Buffer {  const buf = new Buffer();  try {    if (0 > buf.readFromSync(obj as Buffer)) return true;    return false;  } catch {    return false;  } finally {    buf.reset();  }}
export const binary = new Type("tag:yaml.org,2002:binary", {  construct: constructYamlBinary,  kind: "scalar",  predicate: isBinary,  represent: representYamlBinary,  resolve: resolveYamlBinary,});