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|
-- This file is part of SmartEiffel The GNU Eiffel Compiler Tools and Libraries
--
-- SmartEiffel is free software; you can redistribute it and/or modify it
-- under the terms of the GNU General Public License, as published by the
-- Free Software Foundation; either version 2, or (at your option) any later
-- version.
-- SmartEiffel is distributed in the hope that it will be useful but WITHOUT
-- ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
-- FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
-- more details. You should have received a copy of the GNU General Public
-- License along with SmartEiffel; see the file COPYING. If not, write to
-- the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
-- MA 02111-1307, USA.
--
-- Copyright(C) 1994-2002: INRIA - LORIA (INRIA Lorraine) - ESIAL U.H.P.
-- - University of Nancy 1 - FRANCE
-- Copyright(C) 2003: INRIA - LORIA (INRIA Lorraine) - I.U.T. Charlemagne
-- - University of Nancy 2 - FRANCE
--
-- Dominique COLNET, Suzanne COLLIN, Olivier ZENDRA,
-- Philippe RIBET, Cyril ADRIAN
--
-- http://SmartEiffel.loria.fr - SmartEiffel@loria.fr
--
class STRING_ALIASER
--
-- Singleton object used to share constant immutable strings.
-- This singleton is shared via the GLOBALS.`string_aliaser' once
-- function .
-- The goal is to optimize immutable strings comparisons. Thus, any
-- immutable name must be registered here to get the corresponding
-- unique reference.
--
inherit
GLOBALS
VISITABLE
creation make
feature
item(model: STRING): STRING is
require
model /= Void
do
Result := memory.reference_at(model)
if Result = Void then
Result := model.twin
memory_add(Result)
end
ensure
Result.is_equal(model)
end
feature {FEATURE_NAME}
for_prefix(to_string: STRING): STRING is
do
Result := key_for_prefix_infix(once "_px_",to_string)
end
for_infix(to_string: STRING): STRING is
do
Result := key_for_prefix_infix(once "_ix_",to_string)
end
feature {COMPILE_TO_C,COMPILE_TO_JVM}
echo_information is
do
echo.put_string(once "Aliased Strings: ")
echo.put_integer(memory.count)
echo.put_string(fz_dot_new_line)
end
feature {EIFFEL_PARSER}
case_insensitive_notify is
require
eiffel_parser.case_insensitive
do
case_insensitive_for(as_boolean_bits)
case_insensitive_for(as_character_bits)
case_insensitive_for(as_double_bits)
case_insensitive_for(as_integer_bits)
case_insensitive_for(as_minimum_character_code)
case_insensitive_for(as_minimum_double)
case_insensitive_for(as_minimum_real)
case_insensitive_for(as_maximum_character_code)
case_insensitive_for(as_maximum_double)
case_insensitive_for(as_maximum_real)
case_insensitive_for(as_pointer_bits)
case_insensitive_for(as_real_bits)
end
feature {STRING_ALIASER_VISITOR}
accept(visitor: STRING_ALIASER_VISITOR) is
do
visitor.visit_string_aliaser(Current)
end
feature {NONE}
make is
do
-- Hard-coded class names:
memory_add(as_any)
memory_add(as_array)
memory_add(as_bit)
memory_add(as_bit_n)
memory_add(as_boolean)
memory_add(as_boolean_ref)
memory_add(as_character)
memory_add(as_character_ref)
memory_add(as_dictionary)
memory_add(as_double)
memory_add(as_double_ref)
memory_add(as_exceptions)
memory_add(as_fixed_array)
memory_add(as_function)
memory_add(as_general)
memory_add(as_integer_general)
memory_add(as_integer_8)
memory_add(as_integer_16)
memory_add(as_integer_32)
memory_add(as_integer)
memory_add(as_integer_64)
memory_add(as_integer_ref)
memory_add(as_memory)
memory_add(as_native_array)
memory_add(as_none)
memory_add(as_platform)
memory_add(as_pointer)
memory_add(as_pointer_ref)
memory_add(as_predicate)
memory_add(as_procedure)
memory_add(as_real_general)
memory_add(as_real_32)
memory_add(as_real)
memory_add(as_real_64)
memory_add(as_real_ref)
memory_add(as_routine)
memory_add(as_string)
memory_add(as_text_file_read)
memory_add(as_text_file_write)
memory_add(as_tuple)
memory_add(as_type)
memory_add(as_unicode_string)
-- Operator/Infix/Prefix list:
memory_add(as_and)
memory_add(as_and_then)
memory_add(as_at)
memory_add(as_backslash_backslash)
memory_add(as_bit_and)
memory_add(as_bit_clear)
memory_add(as_bit_not)
memory_add(as_bit_or)
memory_add(as_bit_put)
memory_add(as_bit_rotate)
memory_add(as_bit_rotate_left)
memory_add(as_bit_rotate_right)
memory_add(as_bit_set)
memory_add(as_bit_shift_right_unsigned)
memory_add(as_bit_xor)
memory_add(as_eq)
memory_add(as_ge)
memory_add(as_gt)
memory_add(as_implies)
memory_add(as_le)
memory_add(as_lt)
memory_add(as_minus)
memory_add(as_minus_native)
memory_add(as_muls)
memory_add(as_muls_native)
memory_add(as_neq)
memory_add(as_not)
memory_add(as_or)
memory_add(as_or_else)
memory_add(as_plus)
memory_add(as_plus_native)
memory_add(as_pow)
memory_add(as_shift_left)
memory_add(as_shift_right)
memory_add(as_slash)
memory_add(as_slash_slash)
memory_add(as_xor)
-- Hard coded feature names:
memory_add(as_a1)
memory_add(as_add_last)
memory_add(as_agent)
memory_add(as_as_16_ne)
memory_add(as_atan2)
memory_add(as_blank)
memory_add(as_boolean_bits)
memory_add(as_call)
memory_add(as_calloc)
memory_add(as_capacity)
memory_add(as_character_bits)
memory_add(as_clear_all)
memory_add(as_count)
memory_add(as_code)
memory_add(as_collecting)
memory_add(as_collection_off)
memory_add(as_collection_on)
memory_add(as_collector_counter)
memory_add(as_conforms_to)
memory_add(as_copy)
memory_add(as_c_inline_c)
memory_add(as_c_inline_h)
memory_add(as_default_create)
memory_add(as_default_rescue)
memory_add(as_deep_memcmp)
memory_add(as_deep_twin)
memory_add(as_deep_twin_from)
memory_add(as_dispose)
memory_add(as_double_bits)
memory_add(as_double_floor)
memory_add(as_die_with_code)
memory_add(as_element_sizeof)
memory_add(as_exception)
memory_add(as_fifth)
memory_add(as_first)
memory_add(as_floor)
memory_add(as_flush)
memory_add(as_fourth)
memory_add(as_from_pointer)
memory_add(as_full_collect)
memory_add(as_generating_type)
memory_add(as_generator)
memory_add(as_io)
memory_add(as_integer_bits)
memory_add(as_is_basic_expanded_type)
memory_add(as_is_deep_equal)
memory_add(as_is_default)
memory_add(as_is_expanded_type)
memory_add(as_is_equal)
memory_add(as_is_not_null)
memory_add(as_item)
memory_add(as_last)
memory_add(as_lower)
memory_add(as_low_8)
memory_add(as_low_16)
memory_add(as_low_32)
memory_add(as_make)
memory_add(as_minimum_character_code)
memory_add(as_minimum_double)
memory_add(as_minimum_real)
memory_add(as_manifest_initialize)
memory_add(as_maximum_character_code)
memory_add(as_maximum_double)
memory_add(as_maximum_real)
memory_add(as_object_size)
memory_add(as_pointer_bits)
memory_add(as_pointer_size)
memory_add(as_pow_postfix)
memory_add(as_print)
memory_add(as_print_on)
memory_add(as_print_run_time_stack)
memory_add(as_print_all_run_time_stacks)
memory_add(as_put)
memory_add(as_put_0)
memory_add(as_put_1)
memory_add(as_put_16_be)
memory_add(as_put_16_le)
memory_add(as_put_16_ne)
memory_add(as_raise_exception)
memory_add(as_real_bits)
memory_add(as_realloc)
memory_add(as_second)
memory_add(as_set_item)
memory_add(as_same_dynamic_type)
memory_add(as_se_argc)
memory_add(as_se_argv)
memory_add(as_sedb_breakpoint)
memory_add(as_signal_number)
memory_add(as_standard_copy)
memory_add(as_standard_is_equal)
memory_add(as_standard_twin)
memory_add(as_std_error)
memory_add(as_std_input)
memory_add(as_std_output)
memory_add(as_storage)
memory_add(as_third)
memory_add(as_to_bit)
memory_add(as_to_character)
memory_add(as_to_double)
memory_add(as_to_integer_8)
memory_add(as_to_integer_16)
memory_add(as_to_integer)
memory_add(as_to_integer_32)
memory_add(as_to_pointer)
memory_add(as_to_real)
memory_add(as_trace_switch)
memory_add(as_truncated_to_integer)
memory_add(as_twin)
memory_add(as_upper)
memory_add(as_with_capacity)
-- Other names:
memory_add(as_arguments)
memory_add(as_current)
memory_add(as_native_array_character)
memory_add(as_last_result)
memory_add(as_like_current)
memory_add(as_method)
memory_add(as_open_arguments)
memory_add(as_open_argument_indices)
memory_add(as_open_argument_index)
memory_add(as_open_argument_count)
memory_add(as_precursor)
memory_add(as_result)
memory_add(as_target)
memory_add(as_void)
end
buffer: STRING is
once
create Result.make(128)
end
key_for_prefix_infix(tag_prefix_or_infix, to_string: STRING): STRING is
local
i: INTEGER; c: CHARACTER
do
buffer.copy(tag_prefix_or_infix)
from
i := 1
until
i > to_string.count
loop
c := to_string.item(i)
if c.is_letter then
buffer.extend(c)
else
c.code.append_in(buffer)
end
i := i + 1
end
Result := item(buffer)
end
memory_add(str: STRING) is
require
not memory.has(str)
do
memory.add(str, str)
end
case_insensitive_for(str: STRING) is
require
str = memory.reference_at(str)
do
memory.remove(str)
str.to_lower
memory.add(str, str)
end
memory: DICTIONARY[STRING,STRING] is
once
create Result.with_capacity(16384)
end
singleton_memory: STRING_ALIASER is
once
Result := Current
end
invariant
is_real_singleton: Current = singleton_memory
end -- STRING_ALIASER
|
