Class: SQLite3::Driver::Native::Driver

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

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Driver

Returns a new instance of Driver.



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# File 'lib/sqlite3/driver/native/driver.rb', line 15

def initialize
  @callback_data = Hash.new
  @authorizer = Hash.new
  @busy_handler = Hash.new
  @trace = Hash.new
end

Class Method Details

.api_delegate(name) ⇒ Object 



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# File 'lib/sqlite3/driver/native/driver.rb', line 169

def self.api_delegate( name )
  eval "def #{name} (*args) API.sqlite3_#{name}( *args ) ; end"
end

Instance Method Details

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



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# File 'lib/sqlite3/driver/native/driver.rb', line 88

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

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



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# File 'lib/sqlite3/driver/native/driver.rb', line 26

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

#column_decltype(stmt, index, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/native/driver.rb', line 98

def column_decltype( stmt, index, utf16=false )
  API.send(
    ( utf16 ? :sqlite3_column_decltype16 : :sqlite3_column_decltype ),
    stmt, index )
end

#column_name(stmt, index, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/native/driver.rb', line 93

def column_name( stmt, index, utf16=false )
  API.send( ( utf16 ? :sqlite3_column_name16 : :sqlite3_column_name ),
    stmt, index )
end

#column_text(stmt, index, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/native/driver.rb', line 104

def column_text( stmt, index, utf16=false )
  API.send( ( utf16 ? :sqlite3_column_text16 : :sqlite3_column_text ),
    stmt, index )
end

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

Returns:



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# File 'lib/sqlite3/driver/native/driver.rb', line 22

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/native/driver.rb', line 109

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

#errmsg(db, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/native/driver.rb', line 79

def errmsg( db, utf16=false )
  API.send( utf16 ? :sqlite3_errmsg16 : :sqlite3_errmsg, db )
end

#open(filename, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/native/driver.rb', line 75

def open( filename, utf16=false )
  API.send( utf16 ? :sqlite3_open16 : :sqlite3_open, filename )
end

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



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# File 'lib/sqlite3/driver/native/driver.rb', line 83

def prepare( db, sql, utf16=false )
  API.send( ( utf16 ? :sqlite3_prepare16 : :sqlite3_prepare ),
    db, sql )
end

#result_error(context, value, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/native/driver.rb', line 164

def result_error( context, value, utf16=false )
  API.send( ( utf16 ? :sqlite3_result_error16 : :sqlite3_result_error ),
    context, value )
end

#result_text(context, result, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/native/driver.rb', line 153

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

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



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# File 'lib/sqlite3/driver/native/driver.rb', line 45

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

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



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# File 'lib/sqlite3/driver/native/driver.rb', line 60

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

#value_text(value, utf16 = false) ⇒ Object 



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# File 'lib/sqlite3/driver/native/driver.rb', line 142

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