instiki/vendor/plugins/sqlite3-ruby/lib/sqlite3/driver/native/driver.rb

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2009-12-23 03:48:32 +01:00
# support multiple ruby version (fat binaries under windows)
begin
require 'sqlite3_api'
rescue LoadError
if RUBY_PLATFORM =~ /mingw|mswin/ then
RUBY_VERSION =~ /(\d+.\d+)/
require "#{$1}/sqlite3_api"
end
end
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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"
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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