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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
|
local lpeg = require 'lpeglabel'
local save_sort
local table_pack = table.pack
local rawset = rawset
local tointeger = math.tointeger
local tonumber = tonumber
local setmetatable = setmetatable
local string_char = string.char
local P = lpeg.P
local S = lpeg.S
local R = lpeg.R
local V = lpeg.V
local C = lpeg.C
local Ct = lpeg.Ct
local Cg = lpeg.Cg
local Cc = lpeg.Cc
local Cp = lpeg.Cp
local Cs = lpeg.Cs
local EscMap = {
['t'] = '\t',
['r'] = '\r',
['n'] = '\n',
['"'] = '"',
['\\'] = '\\',
}
local BoolMap = {
['true'] = true,
['false'] = false,
}
local hashmt = {
__pairs = function (self)
local i = 1
local function next()
i = i + 1
local k = self[i]
if k == nil then
return
end
local v = self[k]
if v == nil then
return next()
end
return k, v
end
return next
end,
__newindex = function (self, k, v)
local i = 2
while self[i] do
i = i + 1
end
rawset(self, i, k)
rawset(self, k, v)
end,
__debugger_extand = function (self)
local list = {}
for k, v in pairs(self) do
k = tostring(k)
list[#list+1] = k
list[k] = v
end
return list
end,
}
-----------------------------------------------------------------------------
-- JSON4Lua: JSON encoding / decoding support for the Lua language.
-- json Module.
-- Author: Craig Mason-Jones
-- Homepage: http://github.com/craigmj/json4lua/
-- Version: 1.0.0
-- This module is released under the MIT License (MIT).
-- Please see LICENCE.txt for details.
--
local function Utf8(str)
local n = tonumber(str, 16)
-- math.floor(x/2^y) == lazy right shift
-- a % 2^b == bitwise_and(a, (2^b)-1)
-- 64 = 2^6
-- 4096 = 2^12 (or 2^6 * 2^6)
local x
if n < 0x80 then
x = string_char(n % 0x80)
elseif n < 0x800 then
-- [110x xxxx] [10xx xxxx]
x = string_char(0xC0 + ((n // 64) % 0x20), 0x80 + (n % 0x40))
else
-- [1110 xxxx] [10xx xxxx] [10xx xxxx]
x = string_char(0xE0 + ((n // 4096) % 0x10), 0x80 + ((n // 64) % 0x40), 0x80 + (n % 0x40))
end
return x
end
local function HashTable(patt)
return C(patt) / function (_, ...)
local hash = table_pack(...)
local n = hash.n
hash.n = nil
if save_sort then
local max = n // 2
for i = 1, max do
local key, value = hash[2*i-1], hash[2*i]
hash[key] = value
hash[i+1] = key
end
hash[1] = nil
for i = max+2, max*2 do
hash[i] = nil
end
return setmetatable(hash, hashmt)
else
local max = n // 2
for i = 1, max do
local a = 2*i-1
local b = 2*i
local key, value = hash[a], hash[b]
hash[key] = value
hash[a] = nil
hash[b] = nil
end
return hash
end
end
end
local Token = P
{
V'Value' * Cp(),
Nl = P'\r\n' + S'\r\n',
Sp = S' \t',
Spnl = (V'Sp' + V'Nl')^0,
Bool = C(P'true' + P'false') / BoolMap,
Int = C('0' + (P'-'^-1 * R'19' * R'09'^0)) / tointeger,
Float = C(P'-'^-1 * ('0' + R'19' * R'09'^0) * '.' * R'09'^0) / tonumber,
Null = P'null' * Cc(nil),
String = '"' * Cs(V'Char'^0) * '"',
Char = V'Esc' + V'Utf8' + (1 - P'"' - P'\t' - V'Nl'),
Esc = P'\\' * C(S'tnr"\\') / EscMap,
Utf8 = P'\\u' * C(P(4)) / Utf8,
Hash = V'Spnl' * '{' * V'Spnl' * HashTable((V'Object' + P',' * V'Spnl')^0) * V'Spnl' * P'}' * V'Spnl',
Array = V'Spnl' * '[' * V'Spnl' * Ct((V'Value' * V'Spnl' + P',' * V'Spnl')^0) * V'Spnl' * P']' * V'Spnl',
Object = V'Spnl' * V'Key' * V'Spnl' * V'Value' * V'Spnl',
Key = V'String' * V'Spnl' * ':',
Value = V'Hash' + V'Array' + V'Bool' + V'Null' + V'String' + V'Float' + V'Int',
}
return function (str, save_sort_)
save_sort = save_sort_
local table, res, pos = Token:match(str)
if not table then
if not pos or pos <= #str then
pos = pos or 1
error(('没匹配完[%s][%s]\n%s'):format(pos, res, str:sub(pos, pos+100)))
end
end
return table
end
|
