Extend infrastructure for double_intptr_t.

We support an unsigned version of the type, and add functions
for converting between Lisp values and both types.

* arith.c (bignum_dbl_uipt): New function, unsigned companion
to existing bignum_dbl_ipt.
(c_dbl_num, c_dbl_unum): New functions.

* arith.h (bignum_dbl_uipt, c_dbl_num, c_dbl_unum): Declared.

* configure (superulong_t, SIZEOF_DOUBLE_INTPTR,
DOUBLE_INTPTR_MAX, DOUBLE_INTPTR_MIN, DOUBLE_UINTPTR_MAX,
double_uintptr_t): New definitions going into config.h.

* lib.h (dbl_cnum, dbl_ucnum): New typedefs: double-sized
analogs of cnum and ucnum.

* mpi/mpi.c (mp_set_double_uintptr, mp_get_double_uintptr,
mp_get_double_intptr): New functions.
(s_mp_in_big_range): New static function.
(mp_in_double_intptr_range, mp_in_double_uintptr_range): New
functions.

* mpi/mpi.h (mp_set_double_uintptr,
mp_get_double_intptr, mp_get_double_uintptr,
mp_in_double_intptr_range, mp_in_double_uintptr_range):
Declared.

1 files changed, 5 insertions, 0 deletions

diff --git a/lib.h b/lib.h
index 04ba947b..64a08e3d 100644
--- a/lib.h
+++ b/lib.h
@@ -30,6 +30,11 @@
 typedef int_ptr_t cnum;
 typedef uint_ptr_t ucnum;
 
+#ifdef HAVE_DOUBLE_INTPTR_T
+typedef double_intptr_t dbl_cnum;
+typedef double_uintptr_t dbl_ucnum;
+#endif
+
 #ifdef __cplusplus
 #define strip_qual(TYPE, EXPR) (const_cast<TYPE>(EXPR))
 #define convert(TYPE, EXPR) (static_cast<TYPE>(EXPR))