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Just use size_t for emacs_limb_t

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* src/emacs-module.h.in: Do not include limits.h; no longer needed.
(emacs_limb_t, EMACS_LIMB_MAX): Now size_t and SIZE_MAX.
This commit is contained in:
Paul Eggert 2019-12-10 13:54:20 -08:00
parent ea93326cc0
commit 0940296ebe
1 changed files with 7 additions and 17 deletions
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src/emacs-module.h.in
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@ -20,7 +20,6 @@ along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>. */
#ifndef EMACS_MODULE_H
#define EMACS_MODULE_H
#include <limits.h>
#include <stdint.h>
#include <stddef.h>
#include <time.h>
@ -97,22 +96,13 @@ enum emacs_process_input_result
emacs_process_input_quit = 1
};
/*
Implementation note: We define emacs_limb_t so that it is likely to
match the GMP mp_limb_t type. If the types match, GMP can use an
optimization for mpz_import and mpz_export that boils down to a
memcpy. According to https://gmplib.org/manual/ABI-and-ISA.html GMP
will prefer a 64-bit limb and will default to unsigned long if that is
wide enough. Note that this is an internal micro-optimization. Users
shouldn't rely on the exact size of emacs_limb_t.
*/
#if ULONG_MAX == 0xFFFFFFFF
typedef unsigned long long emacs_limb_t;
# define EMACS_LIMB_MAX ULLONG_MAX
#else
typedef unsigned long emacs_limb_t;
# define EMACS_LIMB_MAX ULONG_MAX
#endif
/* Define emacs_limb_t so that it is likely to match GMP's mp_limb_t.
This micro-optimization can help modules that use mpz_export and
mpz_import, which operate more efficiently on mp_limb_t. It's OK
(if perhaps a bit slower) if the two types do not match, and
modules shouldn't rely on the two types matching. */
typedef size_t emacs_limb_t;
#define EMACS_LIMB_MAX SIZE_MAX
struct emacs_env_25
{