Checkout of Instiki Trunk 1/21/2007.
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Jacques Distler
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243
vendor/plugins/sqlite3-ruby/sqlite3/driver/native/driver.rb
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vendor/plugins/sqlite3-ruby/sqlite3/driver/native/driver.rb
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#--
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# =============================================================================
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# Copyright (c) 2004, Jamis Buck (jgb3@email.byu.edu)
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# * Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# * The names of its contributors may not be used to endorse or promote
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# products derived from this software without specific prior written
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# permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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# DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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# SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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# OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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# =============================================================================
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#++
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require 'sqlite3_api'
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module SQLite3 ; module Driver ; module Native
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class Driver
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def initialize
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@callback_data = Hash.new
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@authorizer = Hash.new
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@busy_handler = Hash.new
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@trace = Hash.new
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end
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def complete?( sql, utf16=false )
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API.send( utf16 ? :sqlite3_complete16 : :sqlite3_complete, sql ) != 0
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end
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def busy_handler( db, data=nil, &block )
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if block
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cb = API::CallbackData.new
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cb.proc = block
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cb.data = data
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result = API.sqlite3_busy_handler( db, API::Sqlite3_ruby_busy_handler, cb )
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# Reference the Callback object so that
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# it is not deleted by the GC
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@busy_handler[db] = cb
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else
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# Unreference the callback *after* having removed it
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# from sqlite
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result = API.sqlite3_busy_handler( db, nil, nil )
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@busy_handler.delete(db)
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end
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result
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end
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def set_authorizer( db, data=nil, &block )
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if block
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cb = API::CallbackData.new
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cb.proc = block
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cb.data = data
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result = API.sqlite3_set_authorizer( db, API::Sqlite3_ruby_authorizer, cb )
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@authorizer[db] = cb # see comments in busy_handler
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else
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result = API.sqlite3_set_authorizer( db, nil, nil )
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@authorizer.delete(db) # see comments in busy_handler
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end
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result
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end
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def trace( db, data=nil, &block )
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if block
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cb = API::CallbackData.new
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cb.proc = block
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cb.data = data
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result = API.sqlite3_trace( db, API::Sqlite3_ruby_trace, cb )
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@trace[db] = cb # see comments in busy_handler
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else
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result = API.sqlite3_trace( db, nil, nil )
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@trace.delete(db) # see comments in busy_handler
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end
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result
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end
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def open( filename, utf16=false )
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API.send( utf16 ? :sqlite3_open16 : :sqlite3_open, filename )
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end
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def errmsg( db, utf16=false )
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API.send( utf16 ? :sqlite3_errmsg16 : :sqlite3_errmsg, db )
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end
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def prepare( db, sql, utf16=false )
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API.send( ( utf16 ? :sqlite3_prepare16 : :sqlite3_prepare ),
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db, sql )
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end
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def bind_text( stmt, index, value, utf16=false )
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API.send( ( utf16 ? :sqlite3_bind_text16 : :sqlite3_bind_text ),
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stmt, index, value.to_s )
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end
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def column_name( stmt, index, utf16=false )
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API.send( ( utf16 ? :sqlite3_column_name16 : :sqlite3_column_name ),
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stmt, index )
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end
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def column_decltype( stmt, index, utf16=false )
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API.send(
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( utf16 ? :sqlite3_column_decltype16 : :sqlite3_column_decltype ),
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stmt, index )
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end
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def column_text( stmt, index, utf16=false )
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API.send( ( utf16 ? :sqlite3_column_text16 : :sqlite3_column_text ),
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stmt, index )
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end
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def create_function( db, name, args, text, cookie, func, step, final )
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if func || ( step && final )
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cb = API::CallbackData.new
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cb.proc = cb.proc2 = nil
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cb.data = cookie
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end
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if func
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cb.proc = func
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func = API::Sqlite3_ruby_function_step
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step = final = nil
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elsif step && final
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cb.proc = step
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cb.proc2 = final
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func = nil
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step = API::Sqlite3_ruby_function_step
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final = API::Sqlite3_ruby_function_final
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end
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result = API.sqlite3_create_function( db, name, args, text, cb, func, step, final )
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# see comments in busy_handler
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if cb
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@callback_data[ name ] = cb
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else
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@callback_data.delete( name )
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end
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return result
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end
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def value_text( value, utf16=false )
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method = case utf16
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when nil, false then :sqlite3_value_text
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when :le then :sqlite3_value_text16le
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when :be then :sqlite3_value_text16be
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else :sqlite3_value_text16
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end
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API.send( method, value )
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end
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def result_text( context, result, utf16=false )
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method = case utf16
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when nil, false then :sqlite3_result_text
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when :le then :sqlite3_result_text16le
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when :be then :sqlite3_result_text16be
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else :sqlite3_result_text16
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end
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API.send( method, context, result.to_s )
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end
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def result_error( context, value, utf16=false )
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API.send( ( utf16 ? :sqlite3_result_error16 : :sqlite3_result_error ),
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context, value )
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end
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def self.api_delegate( name )
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define_method( name ) { |*args| API.send( "sqlite3_#{name}", *args ) }
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end
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api_delegate :libversion
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api_delegate :close
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api_delegate :last_insert_rowid
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api_delegate :changes
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api_delegate :total_changes
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api_delegate :interrupt
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api_delegate :busy_timeout
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api_delegate :errcode
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api_delegate :bind_blob
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api_delegate :bind_double
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api_delegate :bind_int
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api_delegate :bind_int64
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api_delegate :bind_null
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api_delegate :bind_parameter_count
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api_delegate :bind_parameter_name
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api_delegate :bind_parameter_index
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api_delegate :column_count
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api_delegate :step
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api_delegate :data_count
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api_delegate :column_blob
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api_delegate :column_bytes
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api_delegate :column_bytes16
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api_delegate :column_double
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api_delegate :column_int
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api_delegate :column_int64
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api_delegate :column_type
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api_delegate :finalize
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api_delegate :reset
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api_delegate :aggregate_count
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api_delegate :value_blob
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api_delegate :value_bytes
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api_delegate :value_bytes16
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api_delegate :value_double
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api_delegate :value_int
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api_delegate :value_int64
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api_delegate :value_type
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api_delegate :result_blob
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api_delegate :result_double
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api_delegate :result_int
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api_delegate :result_int64
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api_delegate :result_null
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api_delegate :result_value
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api_delegate :aggregate_context
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end
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end ; end ; end
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