Use ATTRIBUTE_CONST for some bignum functions

* src/bignum.h (mpz_get_d_rounded):
* src/lisp.h (bignum_to_double, bignum_to_intmax)
(bignum_to_uintmax, bignum_bufsize):
Declare as ATTRIBUTE_CONST.

2 files changed, 5 insertions, 5 deletions

diff --git a/src/bignum.h b/src/bignum.h
index 0c2541a9dc7..ad9021f15fd 100644
--- a/src/bignum.h
+++ b/src/bignum.h
@@ -55,7 +55,7 @@ extern void emacs_mpz_mul_2exp (mpz_t, mpz_t const, EMACS_INT)
   ARG_NONNULL ((1, 2));
 extern void emacs_mpz_pow_ui (mpz_t, mpz_t const, unsigned long)
   ARG_NONNULL ((1, 2));
-extern double mpz_get_d_rounded (mpz_t const);
+extern double mpz_get_d_rounded (mpz_t const) ATTRIBUTE_CONST;
 
 INLINE_HEADER_BEGIN
 
diff --git a/src/lisp.h b/src/lisp.h
index d3b1c39c8fb..f223814d8f3 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -585,7 +585,7 @@ INLINE void set_sub_char_table_contents (Lisp_Object, ptrdiff_t,
                                               Lisp_Object);
 
 /* Defined in bignum.c.  */
-extern double bignum_to_double (Lisp_Object);
+extern double bignum_to_double (Lisp_Object) ATTRIBUTE_CONST;
 extern Lisp_Object make_bigint (intmax_t);
 extern Lisp_Object make_biguint (uintmax_t);
 
@@ -3484,9 +3484,9 @@ set_sub_char_table_contents (Lisp_Object table, ptrdiff_t idx, Lisp_Object val)
 
 /* Defined in bignum.c.  This part of bignum.c's API does not require
    the caller to access bignum internals; see bignum.h for that.  */
-extern intmax_t bignum_to_intmax (Lisp_Object);
-extern uintmax_t bignum_to_uintmax (Lisp_Object);
-extern ptrdiff_t bignum_bufsize (Lisp_Object, int);
+extern intmax_t bignum_to_intmax (Lisp_Object) ATTRIBUTE_CONST;
+extern uintmax_t bignum_to_uintmax (Lisp_Object) ATTRIBUTE_CONST;
+extern ptrdiff_t bignum_bufsize (Lisp_Object, int) ATTRIBUTE_CONST;
 extern ptrdiff_t bignum_to_c_string (char *, ptrdiff_t, Lisp_Object, int);
 extern Lisp_Object bignum_to_string (Lisp_Object, int);
 extern Lisp_Object make_bignum_str (char const *, int);