Class: SQLite3::Driver::DL::Driver

Inherits:
Object
  • Object
show all
Defined in:
lib/sqlite3/driver/dl/driver.rb

Constant Summary collapse

STATIC = 
::DL::PtrData.new(0)
TRANSIENT = 
::DL::PtrData.new(-1)

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.api_delegate(name) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 227

def self.api_delegate( name )
  define_method( name ) { |*args| API.send( "sqlite3_#{name}", *args ) }
end

Instance Method Details

#aggregate_context(context) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 190

def aggregate_context( context )
  ptr = API.sqlite3_aggregate_context( context, 4 )
  ptr.free = nil
  obj = ( ptr ? ptr.to_object : nil )
  if obj.nil?
    obj = Hash.new
    ptr.set_object obj
  end
  obj
end

#bind_blob(stmt, index, value) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 201

def bind_blob( stmt, index, value )
  s = value.to_s
  API.sqlite3_bind_blob( stmt, index, s, s.length, TRANSIENT )
end

#bind_text(stmt, index, value, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 206

def bind_text( stmt, index, value, utf16=false )
  s = value.to_s
  method = ( utf16 ? :sqlite3_bind_text16 : :sqlite3_bind_text )
  API.send( method, stmt, index, s, s.length, TRANSIENT )
end

#busy_handler(db, data = nil, &block) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 113

def busy_handler( db, data=nil, &block )
  @busy_handler = block

  unless @busy_handler_callback
    @busy_handler_callback = ::DL.callback( "IPI" ) do |cookie, timeout|
      @busy_handler.call( cookie, timeout ) || 0
    end
  end

  API.sqlite3_busy_handler( db, block&&@busy_handler_callback, data )
end

#column_blob(stmt, column) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 95

def column_blob( stmt, column )
  blob = API.sqlite3_column_blob( stmt, column )
  blob.free = nil
  blob.to_s( API.sqlite3_column_bytes( stmt, column ) )
end

#column_decltype(stmt, column) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 222

def column_decltype( stmt, column )
  result = API.sqlite3_column_decltype( stmt, column )
  result ? result.to_s : nil
end

#column_name(stmt, column) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 217

def column_name( stmt, column )
  result = API.sqlite3_column_name( stmt, column )
  result ? result.to_s : nil
end

#column_text(stmt, column) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 212

def column_text( stmt, column )
  result = API.sqlite3_column_text( stmt, column )
  result ? result.to_s : nil
end

#commit_hook(db, data = nil, &block) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 280

def commit_hook( db, data=nil, &block )
  @commit_hook_handler = block

  unless @commit_hook_handler_callback
    @commit_hook_handler_callback = ::DL.callback( "IP" ) do |cookie|
      @commit_hook_handler.call( cookie )
    end
  end

  API.sqlite3_commit_hook( db, block&&@commit_hook_handler_callback,
    data )
end

#complete?(sql, utf16 = false) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/sqlite3/driver/dl/driver.rb', line 67

def complete?( sql, utf16=false )
  API.send( utf16 ? :sqlite3_complete16 : :sqlite3_complete, sql+"\0" )
end

#create_function(db, name, args, text, cookie, func, step, final) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 152

def create_function( db, name, args, text, cookie,
  func, step, final )
# begin
  if @func_handler_callback.nil? && func
    @func_handler_callback = ::DL.callback( "0PIP" ) do |context,nargs,args|
      args = args.to_s(nargs*4).unpack("L*").map {|i| ::DL::PtrData.new(i)}
      data = API.sqlite3_user_data( context ).to_object
      data[:func].call( context, *args )
    end
  end

  if @step_handler_callback.nil? && step
    @step_handler_callback = ::DL.callback( "0PIP" ) do |context,nargs,args|
      args = args.to_s(nargs*4).unpack("L*").map {|i| ::DL::PtrData.new(i)}
      data = API.sqlite3_user_data( context ).to_object
      data[:step].call( context, *args )
    end
  end

  if @final_handler_callback.nil? && final
    @final_handler_callback = ::DL.callback( "0P" ) do |context|
      data = API.sqlite3_user_data( context ).to_object
      data[:final].call( context )
    end
  end

  data = { :cookie => cookie,
           :name => name,
           :func => func,
           :step => step,
           :final => final }

  API.sqlite3_create_function( db, name, args, text, data,
    ( func ? @func_handler_callback : nil ),
    ( step ? @step_handler_callback : nil ),
    ( final ? @final_handler_callback : nil ) )
end

#errmsg(db, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 44

def errmsg( db, utf16=false )
  if utf16
    msg = API.sqlite3_errmsg16( db )
    msg.free = nil
    msg.to_s(utf16_length(msg))
  else
    API.sqlite3_errmsg( db )
  end
end

#open(filename, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 37

def open( filename, utf16=false )
  handle = ::DL::PtrData.new(0)
  result = API.send( ( utf16 ? :sqlite3_open16 : :sqlite3_open ),
    filename+"\0", handle.ref )
  [ result, handle ]
end

#prepare(db, sql, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 54

def prepare( db, sql, utf16=false )
  handle = ::DL::PtrData.new(0)
  remainder = ::DL::PtrData.new(0)

  result = API.send( ( utf16 ? :sqlite3_prepare16 : :sqlite3_prepare ),
     db, sql+"\0", sql.length, handle.ref, remainder.ref )

  args = utf16 ? [ utf16_length(remainder) ] : []
  remainder = remainder.to_s( *args )

  [ result, handle, remainder ]
end

#progress_handler(db, n, data = nil, &block) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 267

def progress_handler( db, n, data=nil, &block )
  @progress_handler = block

  unless @progress_handler_callback
    @progress_handler_callback = ::DL.callback( "IP" ) do |cookie|
      @progress_handler.call( cookie )
    end
  end

  API.sqlite3_progress_handler( db, n, block&&@progress_handler_callback,
    data )
end

#result_text(func, text, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 101

def result_text( func, text, utf16=false )
  method = case utf16
    when false, nil then :sqlite3_result_text
    when :le then :sqlite3_result_text16le
    when :be then :sqlite3_result_text16be
    else :sqlite3_result_text16
  end

  s = text.to_s
  API.send( method, func, s, s.length, TRANSIENT )
end

#set_authorizer(db, data = nil, &block) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 125

def set_authorizer( db, data=nil, &block )
  @authorizer_handler = block

  unless @authorizer_handler_callback
    @authorizer_handler_callback = ::DL.callback( "IPIPPPP"
    ) do |cookie,mode,a,b,c,d|
      @authorizer_handler.call( cookie, mode,
        a&&a.to_s, b&&b.to_s, c&&c.to_s, d&&d.to_s ) || 0
    end
  end

  API.sqlite3_set_authorizer( db, block&&@authorizer_handler_callback,
    data )
end

#trace(db, data = nil, &block) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 140

def trace( db, data=nil, &block )
  @trace_handler = block

  unless @trace_handler_callback
    @trace_handler_callback = ::DL.callback( "IPS" ) do |cookie,sql|
      @trace_handler.call( cookie ? cookie.to_object : nil, sql ) || 0
    end
  end

  API.sqlite3_trace( db, block&&@trace_handler_callback, data )
end

#value_blob(value) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 71

def value_blob( value )
  blob = API.sqlite3_value_blob( value )
  blob.free = nil
  blob.to_s( API.sqlite3_value_bytes( value ) )
end

#value_text(value, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/dl/driver.rb', line 77

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

  result = API.send( method, value )
  if utf16
    result.free = nil
    size = API.sqlite3_value_bytes( value )
    result = result.to_s( size )
  end

  result
end