mirror of
https://github.com/Mercury-Language/mercury.git
synced 2026-04-16 09:53:36 +00:00
a3b882930f
While these casts can be implemented by casting via uint, the resulting code is
less readable than code that uses direct casts.
library/uint16.m:
library/uint32.m:
library/uint64.m:
Add cast_from_uint8/1 and cast_to_uint8/1 to these modules.
NEWS:
Announce the above additions.
tests/hard_coded/Mmakefile:
tests/hard_coded/uint{16,32,64}_uint_casts.{m,exp}:
Add tests for the new casts.
84 lines
1.8 KiB
Mathematica
84 lines
1.8 KiB
Mathematica
%---------------------------------------------------------------------------%
|
|
% vim: ft=mercury ts=4 sw=4 et
|
|
%---------------------------------------------------------------------------%
|
|
%
|
|
% Test casting uint32s to/from uint8s.
|
|
%
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- module uint32_uint8_casts.
|
|
:- interface.
|
|
|
|
:- import_module io.
|
|
|
|
:- pred main(io::di, io::uo) is det.
|
|
|
|
%---------------------------------------------------------------------------%
|
|
%---------------------------------------------------------------------------%
|
|
|
|
:- implementation.
|
|
|
|
:- import_module list.
|
|
:- import_module string.
|
|
:- import_module uint32.
|
|
:- import_module uint8.
|
|
|
|
%---------------------------------------------------------------------------%
|
|
|
|
main(!IO) :-
|
|
list.foldl(do_cast_from_uint8_test, uint8s, !IO),
|
|
io.nl(!IO),
|
|
list.foldl(do_cast_to_uint8_test, uint32s, !IO).
|
|
|
|
:- pred do_cast_from_uint8_test(uint8::in, io::di, io::uo) is det.
|
|
|
|
do_cast_from_uint8_test(U8, !IO) :-
|
|
io.format("cast_from_uint8(%uu8) = %uu32\n",
|
|
[u8(U8), u32(cast_from_uint8(U8))], !IO).
|
|
|
|
:- pred do_cast_to_uint8_test(uint32::in, io::di, io::uo) is det.
|
|
|
|
do_cast_to_uint8_test(U32, !IO) :-
|
|
io.format("cast_to_uint8(%uu32) = %uu8\n",
|
|
[u32(U32), u8(cast_to_uint8(U32))], !IO).
|
|
|
|
:- func uint8s = list(uint8).
|
|
|
|
uint8s = [
|
|
0u8,
|
|
7u8,
|
|
8u8,
|
|
15u8,
|
|
16u8,
|
|
31u8,
|
|
32u8,
|
|
63u8,
|
|
64u8,
|
|
127u8,
|
|
128u8,
|
|
254u8,
|
|
255u8
|
|
].
|
|
|
|
:- func uint32s = list(uint32).
|
|
|
|
uint32s = [
|
|
0u32,
|
|
7u32,
|
|
8u32,
|
|
15u32,
|
|
16u32,
|
|
31u32,
|
|
32u32,
|
|
63u32,
|
|
64u32,
|
|
127u32,
|
|
128u32,
|
|
254u32,
|
|
255u32
|
|
].
|
|
|
|
%---------------------------------------------------------------------------%
|
|
:- end_module uint32_uint8_casts.
|
|
%---------------------------------------------------------------------------%
|