diff options
Diffstat (limited to 'src/lisp.h')
| -rw-r--r-- | src/lisp.h | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/src/lisp.h b/src/lisp.h index a46436e718b..1c1e3ec3708 100644 --- a/src/lisp.h +++ b/src/lisp.h @@ -24,6 +24,8 @@ along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */ #include <stddef.h> #include <inttypes.h> +#include <intprops.h> + /* Use the configure flag --enable-checking[=LIST] to enable various types of run time checks for Lisp objects. */ @@ -2408,9 +2410,35 @@ EXFUN (Fadd1, 1); EXFUN (Fsub1, 1); EXFUN (Fmake_variable_buffer_local, 1); +/* Convert the integer I to an Emacs representation, either the integer + itself, or a cons of two or three integers, or if all else fails a float. + I should not have side effects. */ +#define INTEGER_TO_CONS(i) \ + (! FIXNUM_OVERFLOW_P (i) \ + ? make_number (i) \ + : ! ((FIXNUM_OVERFLOW_P (INTMAX_MIN >> 16) \ + || FIXNUM_OVERFLOW_P (UINTMAX_MAX >> 16)) \ + && FIXNUM_OVERFLOW_P ((i) >> 16)) \ + ? Fcons (make_number ((i) >> 16), make_number ((i) & 0xffff)) \ + : ! ((FIXNUM_OVERFLOW_P (INTMAX_MIN >> 16 >> 24) \ + || FIXNUM_OVERFLOW_P (UINTMAX_MAX >> 16 >> 24)) \ + && FIXNUM_OVERFLOW_P ((i) >> 16 >> 24)) \ + ? Fcons (make_number ((i) >> 16 >> 24), \ + Fcons (make_number ((i) >> 16 & 0xffffff), \ + make_number ((i) & 0xffff))) \ + : make_float (i)) + +/* Convert the Emacs representation CONS back to an integer of type + TYPE, storing the result the variable VAR. Signal an error if CONS + is not a valid representation or is out of range for TYPE. */ +#define CONS_TO_INTEGER(cons, type, var) \ + (TYPE_SIGNED (type) \ + ? ((var) = cons_to_signed (cons, TYPE_MINIMUM (type), TYPE_MAXIMUM (type))) \ + : ((var) = cons_to_unsigned (cons, TYPE_MAXIMUM (type)))) +extern intmax_t cons_to_signed (Lisp_Object, intmax_t, intmax_t); +extern uintmax_t cons_to_unsigned (Lisp_Object, uintmax_t); + extern struct Lisp_Symbol *indirect_variable (struct Lisp_Symbol *); -extern Lisp_Object long_to_cons (unsigned long); -extern unsigned long cons_to_long (Lisp_Object); extern void args_out_of_range (Lisp_Object, Lisp_Object) NO_RETURN; extern void args_out_of_range_3 (Lisp_Object, Lisp_Object, Lisp_Object) NO_RETURN; |