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
|
module FFI_Yajl
class Encoder
attr_accessor :opts
def self.encode(obj, *args)
new(*args).encode(obj)
end
def initialize(opts = {})
@opts = opts
end
def encode(obj)
yajl_gen = FFI_Yajl.yajl_gen_alloc(nil, nil)
# configure the yajl encoder
FFI_Yajl.yajl_gen_config(yajl_gen, :yajl_gen_beautify, :int, 1) if opts[:pretty]
FFI_Yajl.yajl_gen_config(yajl_gen, :yajl_gen_validate_utf8, :int, 1)
indent = if opts[:pretty]
opts[:indent] ? opts[:indent] : " "
else
" "
end
FFI_Yajl.yajl_gen_config(yajl_gen, :yajl_gen_indent_string, :string, indent)
# setup our own state
state = {
:json_opts => opts,
:processing_key => false,
}
# do the encoding
obj.ffi_yajl(yajl_gen, state)
# get back our encoded JSON
string_ptr = FFI::MemoryPointer.new(:string)
length_ptr = FFI::MemoryPointer.new(:int)
FFI_Yajl.yajl_gen_get_buf(yajl_gen, string_ptr, length_ptr)
length = length_ptr.read_int
string = string_ptr.get_pointer(0).read_string
return string
ensure
# free up the yajl encoder
FFI_Yajl.yajl_gen_free(yajl_gen)
end
end
end
class Hash
def ffi_yajl(yajl_gen, state)
FFI_Yajl.yajl_gen_map_open(yajl_gen)
self.each do |key, value|
# Perf Fix: mutate state hash rather than creating new copy
state[:processing_key] = true
key.ffi_yajl(yajl_gen, state)
state[:processing_key] = false
value.ffi_yajl(yajl_gen, state)
end
FFI_Yajl.yajl_gen_map_close(yajl_gen)
end
end
class Array
def ffi_yajl(yajl_gen, state)
FFI_Yajl.yajl_gen_array_open(yajl_gen)
self.each do |value|
value.ffi_yajl(yajl_gen, state)
end
FFI_Yajl.yajl_gen_array_close(yajl_gen)
end
end
class NilClass
def ffi_yajl(yajl_gen, state)
FFI_Yajl.yajl_gen_null(yajl_gen)
end
end
class TrueClass
def ffi_yajl(yajl_gen, state)
FFI_Yajl.yajl_gen_bool(yajl_gen, 0)
end
end
class FalseClass
def ffi_yajl(yajl_gen, state)
FFI_Yajl.yajl_gen_bool(yajl_gen, 1)
end
end
class Fixnum
def ffi_yajl(yajl_gen, state)
if state[:processing_key]
str = self.to_s
FFI_Yajl.yajl_gen_string(yajl_gen, str, str.length)
else
FFI_Yajl.yajl_gen_integer(yajl_gen, self)
end
end
end
class Bignum
def ffi_yajl(yajl_gen, state)
raise NotImpelementedError
end
end
class Float
def ffi_yajl(yajl_gen, state)
FFI_Yajl.yajl_gen_double(yajl_gen, self)
end
end
class String
def ffi_yajl(yajl_gen, state)
FFI_Yajl.yajl_gen_string(yajl_gen, self, self.length)
end
end
# I feel dirty
class Object
unless defined?(ActiveSupport)
def to_json(*args, &block)
"\"#{to_s}\""
end
end
def ffi_yajl(yajl_gen, state)
json = self.to_json(state[:json_opts])
FFI_Yajl.yajl_gen_number(yajl_gen, json, json.length)
end
end
|
