groan/groan.js at master · mscdex/groan · GitHub

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
function PHParse(str) {
  var o = { str: str, pos: 0 };
  if (str.indexOf('|') === -1)
    return __PHParseValue(o);
  else {
    var result = {};
    for (var k , v, i, last = o.str.length; o.pos < last;) {
      i = o.str.indexOf('|', o.pos);
      k = o.str.substring(o.pos, i);
      o.pos = i + 1;
      v = __PHParseValue(o);
      result[k] = v;
    }
    return result;
  }
}
var __PHParseValue = function(o) {
  var v, type = o.str[o.pos].toLowerCase(), len, idelim;
  o.pos += 2;
  if (type === 's') {
    idelim = o.str.indexOf(':', o.pos);
    len = parseInt(o.str.substring(o.pos, idelim), 10);
    o.pos = idelim + 2;
    for (var i = 0, cc; i < len; ++i) {
      cc = fixedCharCodeAt(o.str, o.pos + i);
      if (typeof cc === 'number') {
        if (cc < 128)
          ;
        else if (cc < 2048)
          len -= 1;
        else if (cc < 65536)
          len -= 2;
        else if (cc < 2097152)
          len -= 3;
        else if (cc < 67108864)
          len -= 4;
        else
          len -= 5;
      }
    }
    v = o.str.substr(o.pos, len);
    o.pos += len + 2;
  } else if (type === 'i') {
    idelim = o.str.indexOf(';', o.pos);
    v = parseInt(o.str.substring(o.pos, idelim), 10);
    o.pos = idelim + 1;
  } else if (type === 'd') {
    idelim = o.str.indexOf(';', o.pos);
    v = parseFloat(o.str.substring(o.pos, idelim), 10);
    o.pos = idelim + 1;
  } else if (type === 'b') {
    v = (o.str[o.pos] === '1');
    o.pos += 2;
  } else if (type === 'a' || type === 'o') {
    v = {};
    if (type === 'o') {
      // skip object class name
      idelim = o.str.indexOf(':', o.pos);
      len = parseInt(o.str.substring(o.pos, idelim), 10);
      o.pos = idelim + 2 + len + 2;
    }
    idelim = o.str.indexOf(':', o.pos);
    len = parseInt(o.str.substring(o.pos, idelim), 10);
    o.pos = idelim + 2;
    var isArray = true;
    for (var i = 0, key; i < len; ++i) {
      key = __PHParseValue(o);
      v[key] = __PHParseValue(o);
      if (typeof key !== 'number' && isArray)
        isArray = false;
    }
    if (type === 'a' && isArray) {
      // make "arrays" with no/(only numeric) keys, javascript arrays
      v.length = Object.keys(v).length;
      v = Array.prototype.slice.call(v);
    }
    ++o.pos;
  } else if (type === 'r') {
    // TODO: support for recursion/references
    o.pos = o.str.indexOf(';', o.pos) + 1;
    v = undefined;
  } else if (type === 'n')
    v = null;
  else if (type === 'c') {
    v = {};

    idelim = o.str.indexOf(':', o.pos);
    len = parseInt(o.str.substring(o.pos, idelim), 10);
    o.pos = idelim + 2;
    //var clsName = o.str.substring(o.pos, o.pos + len);
    o.pos += len + 2;

    idelim = o.str.indexOf(':', o.pos);
    len = parseInt(o.str.substring(o.pos, idelim), 10);
    o.pos = idelim + 2;
    //v[clsName] = o.str.substring(o.pos, o.pos + len);
    v = o.str.substring(o.pos, o.pos + len);
    o.pos += len + 1;
  }
  return v;
};

if (module)
  module.exports = PHParse;
else if (window)
  window.PHParse = PHParse;

// fixedCharCodeAt by Frank Neff, licensed GPLv2
// original source: https://gist.github.com/frne/1358348
function fixedCharCodeAt(str, idx) {
  idx = idx || 0;
  var code = str.charCodeAt(idx), hi, low;
  if (0xD800 <= code && code <= 0xDBFF) {
    // High surrogate (could change last
    // hex to 0xDB7F to treat high private
    // surrogates as single characters)
    hi = code;
    low = str.charCodeAt(idx + 1);
    return ((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000;
  }
  if (0xDC00 <= code && code <= 0xDFFF) {
    // Low surrogate
    // We return false to allow loops to skip this iteration since should have
    // already handled high surrogate above in the previous iteration
    return false;
    /*hi = str.charCodeAt(idx-1);
     low = code;
     return ((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000;*/
  }
  return code;
}