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[ruby/fiddle] Move "type" constants to Fiddle::Types (https://github.com/ruby/fiddle/pull/112)

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This helps to reduce repetition in code. Instead of doing "TYPE_*"
everywhere, you can do `include Fiddle::Types`, and write the type name
directly.

This PR is to help reduce repetition when writing Fiddle code. Right now
we have to type `TYPE_` everywhere, and you also have to include all of
`Fiddle` to access `TYPE_*` constants. With this change, you can just
include `Fiddle::Types` and it will shorten your code and also you only
have to include those constants.

Here is an example before:

```ruby
require "fiddle"

module MMAP
  # All Fiddle constants included
  include Fiddle

  def self.make_function name, args, ret
    ptr = Handle::DEFAULT[name]
    func = Function.new ptr, args, ret, name: name
    define_singleton_method name, &func.to_proc
  end

  make_function "munmap", [TYPE_VOIDP, # addr
                           TYPE_SIZE_T], # len
                           TYPE_INT

  make_function "mmap", [TYPE_VOIDP,
                         TYPE_SIZE_T,
                         TYPE_INT,
                         TYPE_INT,
                         TYPE_INT,
                         TYPE_INT], TYPE_VOIDP

  make_function "mprotect", [TYPE_VOIDP, TYPE_SIZE_T, TYPE_INT], TYPE_INT
end
```

After:

```ruby
require "fiddle"

module MMAP
  # Only type names included
  include Fiddle::Types

  def self.make_function name, args, ret
    ptr = Fiddle::Handle::DEFAULT[name]
    func = Fiddle::Function.new ptr, args, ret, name: name
    define_singleton_method name, &func.to_proc
  end

  make_function "munmap", [VOIDP, # addr
                           SIZE_T], # len
                           INT

  make_function "mmap", [VOIDP, SIZE_T, INT, INT, INT, INT], VOIDP

  make_function "mprotect", [VOIDP, SIZE_T, INT], INT
end
```

We only need to import the type names, and you don't have to type
`TYPE_` over and over. I think this makes Fiddle code easier to read.

https://github.com/ruby/fiddle/commit/49fa7233e5

Co-authored-by: Sutou Kouhei <kou@clear-code.com>
This commit is contained in:
Aaron Patterson 2022-09-13 08:26:47 -07:00 committed by Hiroshi SHIBATA
parent 48a6498406
commit 755d99e878
3 changed files with 70 additions and 58 deletions
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118
ext/fiddle/fiddle.c
View file

@ -164,191 +164,193 @@ Init_fiddle(void)
*/
rb_eFiddleDLError = rb_define_class_under(mFiddle, "DLError", rb_eFiddleError);
/* Document-const: TYPE_VOID
VALUE mFiddleTypes = rb_define_module_under(mFiddle, "Types");
/* Document-const: Fiddle::Types::VOID
*
* C type - void
*/
rb_define_const(mFiddle, "TYPE_VOID", INT2NUM(TYPE_VOID));
rb_define_const(mFiddleTypes, "VOID", INT2NUM(TYPE_VOID));
/* Document-const: TYPE_VOIDP
/* Document-const: Fiddle::Types::VOIDP
*
* C type - void*
*/
rb_define_const(mFiddle, "TYPE_VOIDP", INT2NUM(TYPE_VOIDP));
rb_define_const(mFiddleTypes, "VOIDP", INT2NUM(TYPE_VOIDP));
/* Document-const: TYPE_CHAR
/* Document-const: Fiddle::Types::CHAR
*
* C type - char
*/
rb_define_const(mFiddle, "TYPE_CHAR", INT2NUM(TYPE_CHAR));
rb_define_const(mFiddleTypes, "CHAR", INT2NUM(TYPE_CHAR));
/* Document-const: TYPE_UCHAR
/* Document-const: Fiddle::Types::UCHAR
*
* C type - unsigned char
*/
rb_define_const(mFiddle, "TYPE_UCHAR", INT2NUM(TYPE_UCHAR));
rb_define_const(mFiddleTypes, "UCHAR", INT2NUM(TYPE_UCHAR));
/* Document-const: TYPE_SHORT
/* Document-const: Fiddle::Types::SHORT
*
* C type - short
*/
rb_define_const(mFiddle, "TYPE_SHORT", INT2NUM(TYPE_SHORT));
rb_define_const(mFiddleTypes, "SHORT", INT2NUM(TYPE_SHORT));
/* Document-const: TYPE_USHORT
/* Document-const: Fiddle::Types::USHORT
*
* C type - unsigned short
*/
rb_define_const(mFiddle, "TYPE_USHORT", INT2NUM(TYPE_USHORT));
rb_define_const(mFiddleTypes, "USHORT", INT2NUM(TYPE_USHORT));
/* Document-const: TYPE_INT
/* Document-const: Fiddle::Types::INT
*
* C type - int
*/
rb_define_const(mFiddle, "TYPE_INT", INT2NUM(TYPE_INT));
rb_define_const(mFiddleTypes, "INT", INT2NUM(TYPE_INT));
/* Document-const: TYPE_UINT
/* Document-const: Fiddle::Types::UINT
*
* C type - unsigned int
*/
rb_define_const(mFiddle, "TYPE_UINT", INT2NUM(TYPE_UINT));
rb_define_const(mFiddleTypes, "UINT", INT2NUM(TYPE_UINT));
/* Document-const: TYPE_LONG
/* Document-const: Fiddle::Types::LONG
*
* C type - long
*/
rb_define_const(mFiddle, "TYPE_LONG", INT2NUM(TYPE_LONG));
rb_define_const(mFiddleTypes, "LONG", INT2NUM(TYPE_LONG));
/* Document-const: TYPE_ULONG
/* Document-const: Fiddle::Types::ULONG
*
* C type - long
*/
rb_define_const(mFiddle, "TYPE_ULONG", INT2NUM(TYPE_ULONG));
rb_define_const(mFiddleTypes, "ULONG", INT2NUM(TYPE_ULONG));
#if HAVE_LONG_LONG
/* Document-const: TYPE_LONG_LONG
/* Document-const: Fiddle::Types::LONG_LONG
*
* C type - long long
*/
rb_define_const(mFiddle, "TYPE_LONG_LONG", INT2NUM(TYPE_LONG_LONG));
rb_define_const(mFiddleTypes, "LONG_LONG", INT2NUM(TYPE_LONG_LONG));
/* Document-const: TYPE_ULONG_LONG
/* Document-const: Fiddle::Types::ULONG_LONG
*
* C type - long long
*/
rb_define_const(mFiddle, "TYPE_ULONG_LONG", INT2NUM(TYPE_ULONG_LONG));
rb_define_const(mFiddleTypes, "ULONG_LONG", INT2NUM(TYPE_ULONG_LONG));
#endif
#ifdef TYPE_INT8_T
/* Document-const: TYPE_INT8_T
/* Document-const: Fiddle::Types::INT8_T
*
* C type - int8_t
*/
rb_define_const(mFiddle, "TYPE_INT8_T", INT2NUM(TYPE_INT8_T));
rb_define_const(mFiddleTypes, "INT8_T", INT2NUM(TYPE_INT8_T));
/* Document-const: TYPE_UINT8_T
/* Document-const: Fiddle::Types::UINT8_T
*
* C type - uint8_t
*/
rb_define_const(mFiddle, "TYPE_UINT8_T", INT2NUM(TYPE_UINT8_T));
rb_define_const(mFiddleTypes, "UINT8_T", INT2NUM(TYPE_UINT8_T));
#endif
#ifdef TYPE_INT16_T
/* Document-const: TYPE_INT16_T
/* Document-const: Fiddle::Types::INT16_T
*
* C type - int16_t
*/
rb_define_const(mFiddle, "TYPE_INT16_T", INT2NUM(TYPE_INT16_T));
rb_define_const(mFiddleTypes, "INT16_T", INT2NUM(TYPE_INT16_T));
/* Document-const: TYPE_UINT16_T
/* Document-const: Fiddle::Types::UINT16_T
*
* C type - uint16_t
*/
rb_define_const(mFiddle, "TYPE_UINT16_T", INT2NUM(TYPE_UINT16_T));
rb_define_const(mFiddleTypes, "UINT16_T", INT2NUM(TYPE_UINT16_T));
#endif
#ifdef TYPE_INT32_T
/* Document-const: TYPE_INT32_T
/* Document-const: Fiddle::Types::INT32_T
*
* C type - int32_t
*/
rb_define_const(mFiddle, "TYPE_INT32_T", INT2NUM(TYPE_INT32_T));
rb_define_const(mFiddleTypes, "INT32_T", INT2NUM(TYPE_INT32_T));
/* Document-const: TYPE_UINT32_T
/* Document-const: Fiddle::Types::UINT32_T
*
* C type - uint32_t
*/
rb_define_const(mFiddle, "TYPE_UINT32_T", INT2NUM(TYPE_UINT32_T));
rb_define_const(mFiddleTypes, "UINT32_T", INT2NUM(TYPE_UINT32_T));
#endif
#ifdef TYPE_INT64_T
/* Document-const: TYPE_INT64_T
/* Document-const: Fiddle::Types::INT64_T
*
* C type - int64_t
*/
rb_define_const(mFiddle, "TYPE_INT64_T", INT2NUM(TYPE_INT64_T));
rb_define_const(mFiddleTypes, "INT64_T", INT2NUM(TYPE_INT64_T));
/* Document-const: TYPE_UINT64_T
/* Document-const: Fiddle::Types::UINT64_T
*
* C type - uint64_t
*/
rb_define_const(mFiddle, "TYPE_UINT64_T", INT2NUM(TYPE_UINT64_T));
rb_define_const(mFiddleTypes, "UINT64_T", INT2NUM(TYPE_UINT64_T));
#endif
/* Document-const: TYPE_FLOAT
/* Document-const: Fiddle::Types::FLOAT
*
* C type - float
*/
rb_define_const(mFiddle, "TYPE_FLOAT", INT2NUM(TYPE_FLOAT));
rb_define_const(mFiddleTypes, "FLOAT", INT2NUM(TYPE_FLOAT));
/* Document-const: TYPE_DOUBLE
/* Document-const: Fiddle::Types::DOUBLE
*
* C type - double
*/
rb_define_const(mFiddle, "TYPE_DOUBLE", INT2NUM(TYPE_DOUBLE));
rb_define_const(mFiddleTypes, "DOUBLE", INT2NUM(TYPE_DOUBLE));
#ifdef HAVE_FFI_PREP_CIF_VAR
/* Document-const: TYPE_VARIADIC
/* Document-const: Fiddle::Types::VARIADIC
*
* C type - ...
*/
rb_define_const(mFiddle, "TYPE_VARIADIC", INT2NUM(TYPE_VARIADIC));
rb_define_const(mFiddleTypes, "VARIADIC", INT2NUM(TYPE_VARIADIC));
#endif
/* Document-const: TYPE_CONST_STRING
/* Document-const: Fiddle::Types::CONST_STRING
*
* C type - const char* ('\0' terminated const char*)
*/
rb_define_const(mFiddle, "TYPE_CONST_STRING", INT2NUM(TYPE_CONST_STRING));
rb_define_const(mFiddleTypes, "CONST_STRING", INT2NUM(TYPE_CONST_STRING));
/* Document-const: TYPE_SIZE_T
/* Document-const: Fiddle::Types::SIZE_T
*
* C type - size_t
*/
rb_define_const(mFiddle, "TYPE_SIZE_T", INT2NUM(TYPE_SIZE_T));
rb_define_const(mFiddleTypes, "SIZE_T", INT2NUM(TYPE_SIZE_T));
/* Document-const: TYPE_SSIZE_T
/* Document-const: Fiddle::Types::SSIZE_T
*
* C type - ssize_t
*/
rb_define_const(mFiddle, "TYPE_SSIZE_T", INT2NUM(TYPE_SSIZE_T));
rb_define_const(mFiddleTypes, "SSIZE_T", INT2NUM(TYPE_SSIZE_T));
/* Document-const: TYPE_PTRDIFF_T
/* Document-const: Fiddle::Types::PTRDIFF_T
*
* C type - ptrdiff_t
*/
rb_define_const(mFiddle, "TYPE_PTRDIFF_T", INT2NUM(TYPE_PTRDIFF_T));
rb_define_const(mFiddleTypes, "PTRDIFF_T", INT2NUM(TYPE_PTRDIFF_T));
/* Document-const: TYPE_INTPTR_T
/* Document-const: Fiddle::Types::INTPTR_T
*
* C type - intptr_t
*/
rb_define_const(mFiddle, "TYPE_INTPTR_T", INT2NUM(TYPE_INTPTR_T));
rb_define_const(mFiddleTypes, "INTPTR_T", INT2NUM(TYPE_INTPTR_T));
/* Document-const: TYPE_UINTPTR_T
/* Document-const: Fiddle::Types::UINTPTR_T
*
* C type - uintptr_t
*/
rb_define_const(mFiddle, "TYPE_UINTPTR_T", INT2NUM(TYPE_UINTPTR_T));
rb_define_const(mFiddleTypes, "UINTPTR_T", INT2NUM(TYPE_UINTPTR_T));
/* Document-const: ALIGN_VOIDP
*

4
ext/fiddle/lib/fiddle.rb
View file

@ -67,4 +67,8 @@ module Fiddle
RTLD_GLOBAL = Handle::RTLD_GLOBAL # :nodoc:
RTLD_LAZY = Handle::RTLD_LAZY # :nodoc:
RTLD_NOW = Handle::RTLD_NOW # :nodoc:
Fiddle::Types.constants.each do |type|
const_set "TYPE_#{type}", Fiddle::Types.const_get(type)
end
end

6
test/fiddle/test_import.rb
View file

@ -139,6 +139,12 @@ module Fiddle
end
end
def test_type_constants
Fiddle::Types.constants.each do |const|
assert_equal Fiddle::Types.const_get(const), Fiddle.const_get("TYPE_#{const}")
end
end
def test_unsigned_result()
d = (2 ** 31) + 1