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
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
|
require 'sqlite3_api'
module SQLite3 ; module Driver ; module Native
class Driver
def initialize
@callback_data = Hash.new
@authorizer = Hash.new
@busy_handler = Hash.new
@trace = Hash.new
end
def complete?( sql, utf16=false )
API.send( utf16 ? :sqlite3_complete16 : :sqlite3_complete, sql ) != 0
end
def busy_handler( db, data=nil, &block )
if block
cb = API::CallbackData.new
cb.proc = block
cb.data = data
result = API.sqlite3_busy_handler( db, API::Sqlite3_ruby_busy_handler, cb )
# Reference the Callback object so that
# it is not deleted by the GC
@busy_handler[db] = cb
else
# Unreference the callback *after* having removed it
# from sqlite
result = API.sqlite3_busy_handler( db, nil, nil )
@busy_handler.delete(db)
end
result
end
def set_authorizer( db, data=nil, &block )
if block
cb = API::CallbackData.new
cb.proc = block
cb.data = data
result = API.sqlite3_set_authorizer( db, API::Sqlite3_ruby_authorizer, cb )
@authorizer[db] = cb # see comments in busy_handler
else
result = API.sqlite3_set_authorizer( db, nil, nil )
@authorizer.delete(db) # see comments in busy_handler
end
result
end
def trace( db, data=nil, &block )
if block
cb = API::CallbackData.new
cb.proc = block
cb.data = data
result = API.sqlite3_trace( db, API::Sqlite3_ruby_trace, cb )
@trace[db] = cb # see comments in busy_handler
else
result = API.sqlite3_trace( db, nil, nil )
@trace.delete(db) # see comments in busy_handler
end
result
end
def open( filename, utf16=false )
API.send( utf16 ? :sqlite3_open16 : :sqlite3_open, filename )
end
def errmsg( db, utf16=false )
API.send( utf16 ? :sqlite3_errmsg16 : :sqlite3_errmsg, db )
end
def prepare( db, sql, utf16=false )
API.send( ( utf16 ? :sqlite3_prepare16 : :sqlite3_prepare ),
db, sql )
end
def bind_text( stmt, index, value, utf16=false )
API.send( ( utf16 ? :sqlite3_bind_text16 : :sqlite3_bind_text ),
stmt, index, value.to_s )
end
def column_name( stmt, index, utf16=false )
API.send( ( utf16 ? :sqlite3_column_name16 : :sqlite3_column_name ),
stmt, index )
end
def column_decltype( stmt, index, utf16=false )
API.send(
( utf16 ? :sqlite3_column_decltype16 : :sqlite3_column_decltype ),
stmt, index )
end
def column_text( stmt, index, utf16=false )
API.send( ( utf16 ? :sqlite3_column_text16 : :sqlite3_column_text ),
stmt, index )
end
def create_function( db, name, args, text, cookie, func, step, final )
if func || ( step && final )
cb = API::CallbackData.new
cb.proc = cb.proc2 = nil
cb.data = cookie
end
if func
cb.proc = func
func = API::Sqlite3_ruby_function_step
step = final = nil
elsif step && final
cb.proc = step
cb.proc2 = final
func = nil
step = API::Sqlite3_ruby_function_step
final = API::Sqlite3_ruby_function_final
end
result = API.sqlite3_create_function( db, name, args, text, cb, func, step, final )
# see comments in busy_handler
if cb
@callback_data[ name ] = cb
else
@callback_data.delete( name )
end
return result
end
def value_text( value, utf16=false )
method = case utf16
when nil, false then :sqlite3_value_text
when :le then :sqlite3_value_text16le
when :be then :sqlite3_value_text16be
else :sqlite3_value_text16
end
API.send( method, value )
end
def result_text( context, result, utf16=false )
method = case utf16
when nil, false then :sqlite3_result_text
when :le then :sqlite3_result_text16le
when :be then :sqlite3_result_text16be
else :sqlite3_result_text16
end
API.send( method, context, result.to_s )
end
def result_error( context, value, utf16=false )
API.send( ( utf16 ? :sqlite3_result_error16 : :sqlite3_result_error ),
context, value )
end
def self.api_delegate( name )
eval "def #{name} (*args) API.sqlite3_#{name}( *args ) ; end"
end
api_delegate :libversion
api_delegate :close
api_delegate :last_insert_rowid
api_delegate :changes
api_delegate :total_changes
api_delegate :interrupt
api_delegate :busy_timeout
api_delegate :errcode
api_delegate :bind_blob
api_delegate :bind_double
api_delegate :bind_int
api_delegate :bind_int64
api_delegate :bind_null
api_delegate :bind_parameter_count
api_delegate :bind_parameter_name
api_delegate :bind_parameter_index
api_delegate :column_count
api_delegate :step
api_delegate :data_count
api_delegate :column_blob
api_delegate :column_bytes
api_delegate :column_bytes16
api_delegate :column_double
api_delegate :column_int
api_delegate :column_int64
api_delegate :column_type
api_delegate :finalize
api_delegate :reset
api_delegate :aggregate_count
api_delegate :value_blob
api_delegate :value_bytes
api_delegate :value_bytes16
api_delegate :value_double
api_delegate :value_int
api_delegate :value_int64
api_delegate :value_type
api_delegate :result_blob
api_delegate :result_double
api_delegate :result_int
api_delegate :result_int64
api_delegate :result_null
api_delegate :result_value
api_delegate :aggregate_context
end
end ; end ; end
|
