mirror of
https://git.savannah.gnu.org/git/emacs.git
synced 2024-11-24 07:20:37 +00:00
400 lines
18 KiB
C
400 lines
18 KiB
C
/* intprops-internal.h -- properties of integer types not visible to users
|
|
|
|
Copyright (C) 2001-2024 Free Software Foundation, Inc.
|
|
|
|
This program is free software: you can redistribute it and/or modify it
|
|
under the terms of the GNU Lesser General Public License as published
|
|
by the Free Software Foundation; either version 2.1 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public License
|
|
along with this program. If not, see <https://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _GL_INTPROPS_INTERNAL_H
|
|
#define _GL_INTPROPS_INTERNAL_H
|
|
|
|
#include <limits.h>
|
|
|
|
/* Pacify GCC 13.2 in some calls to _GL_EXPR_SIGNED. */
|
|
#if defined __GNUC__ && 4 < __GNUC__ + (3 <= __GNUC_MINOR__)
|
|
# pragma GCC diagnostic ignored "-Wtype-limits"
|
|
#endif
|
|
|
|
/* Return a value with the common real type of E and V and the value of V.
|
|
Do not evaluate E. */
|
|
#define _GL_INT_CONVERT(e, v) ((1 ? 0 : (e)) + (v))
|
|
|
|
/* Act like _GL_INT_CONVERT (E, -V) but work around a bug in IRIX 6.5 cc; see
|
|
<https://lists.gnu.org/r/bug-gnulib/2011-05/msg00406.html>. */
|
|
#define _GL_INT_NEGATE_CONVERT(e, v) ((1 ? 0 : (e)) - (v))
|
|
|
|
/* The extra casts in the following macros work around compiler bugs,
|
|
e.g., in Cray C 5.0.3.0. */
|
|
|
|
/* True if the real type T is signed. */
|
|
#define _GL_TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
|
|
|
|
/* Return 1 if the real expression E, after promotion, has a
|
|
signed or floating type. Do not evaluate E. */
|
|
#define _GL_EXPR_SIGNED(e) (_GL_INT_NEGATE_CONVERT (e, 1) < 0)
|
|
|
|
|
|
/* Minimum and maximum values for integer types and expressions. */
|
|
|
|
/* The width in bits of the integer type or expression T.
|
|
Do not evaluate T. T must not be a bit-field expression.
|
|
Padding bits are not supported; this is checked at compile-time below. */
|
|
#define _GL_TYPE_WIDTH(t) (sizeof (t) * CHAR_BIT)
|
|
|
|
/* The maximum and minimum values for the type of the expression E,
|
|
after integer promotion. E is not evaluated. */
|
|
#define _GL_INT_MINIMUM(e) \
|
|
(_GL_EXPR_SIGNED (e) \
|
|
? ~ _GL_SIGNED_INT_MAXIMUM (e) \
|
|
: _GL_INT_CONVERT (e, 0))
|
|
#define _GL_INT_MAXIMUM(e) \
|
|
(_GL_EXPR_SIGNED (e) \
|
|
? _GL_SIGNED_INT_MAXIMUM (e) \
|
|
: _GL_INT_NEGATE_CONVERT (e, 1))
|
|
#define _GL_SIGNED_INT_MAXIMUM(e) \
|
|
(((_GL_INT_CONVERT (e, 1) << (_GL_TYPE_WIDTH (+ (e)) - 2)) - 1) * 2 + 1)
|
|
|
|
/* Work around OpenVMS incompatibility with C99. */
|
|
#if !defined LLONG_MAX && defined __INT64_MAX
|
|
# define LLONG_MAX __INT64_MAX
|
|
# define LLONG_MIN __INT64_MIN
|
|
#endif
|
|
|
|
/* This include file assumes that signed types are two's complement without
|
|
padding bits; the above macros have undefined behavior otherwise.
|
|
If this is a problem for you, please let us know how to fix it for your host.
|
|
This assumption is tested by the intprops-tests module. */
|
|
|
|
/* Does the __typeof__ keyword work? This could be done by
|
|
'configure', but for now it's easier to do it by hand. */
|
|
#if (2 <= __GNUC__ \
|
|
|| (4 <= __clang_major__) \
|
|
|| (1210 <= __IBMC__ && defined __IBM__TYPEOF__) \
|
|
|| (0x5110 <= __SUNPRO_C && !__STDC__))
|
|
# define _GL_HAVE___TYPEOF__ 1
|
|
#else
|
|
# define _GL_HAVE___TYPEOF__ 0
|
|
#endif
|
|
|
|
/* Return 1 if the integer type or expression T might be signed. Return 0
|
|
if it is definitely unsigned. T must not be a bit-field expression.
|
|
This macro does not evaluate its argument, and expands to an
|
|
integer constant expression. */
|
|
#if _GL_HAVE___TYPEOF__
|
|
# define _GL_SIGNED_TYPE_OR_EXPR(t) _GL_TYPE_SIGNED (__typeof__ (t))
|
|
#else
|
|
# define _GL_SIGNED_TYPE_OR_EXPR(t) 1
|
|
#endif
|
|
|
|
/* Return 1 if - A would overflow in [MIN,MAX] arithmetic.
|
|
A should not have side effects, and A's type should be an
|
|
integer with minimum value MIN and maximum MAX. */
|
|
#define _GL_INT_NEGATE_RANGE_OVERFLOW(a, min, max) \
|
|
((min) < 0 ? (a) < - (max) : 0 < (a))
|
|
|
|
/* True if __builtin_add_overflow (A, B, P) and __builtin_sub_overflow
|
|
(A, B, P) work when P is non-null. */
|
|
#ifdef __EDG__
|
|
/* EDG-based compilers like nvc 22.1 cannot add 64-bit signed to unsigned
|
|
<https://bugs.gnu.org/53256>. */
|
|
# define _GL_HAS_BUILTIN_ADD_OVERFLOW 0
|
|
#elif defined __has_builtin
|
|
# define _GL_HAS_BUILTIN_ADD_OVERFLOW __has_builtin (__builtin_add_overflow)
|
|
/* __builtin_{add,sub}_overflow exists but is not reliable in GCC 5.x and 6.x,
|
|
see <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98269>. */
|
|
#elif 7 <= __GNUC__
|
|
# define _GL_HAS_BUILTIN_ADD_OVERFLOW 1
|
|
#else
|
|
# define _GL_HAS_BUILTIN_ADD_OVERFLOW 0
|
|
#endif
|
|
|
|
/* True if __builtin_mul_overflow (A, B, P) works when P is non-null. */
|
|
#if defined __clang_major__ && __clang_major__ < 14
|
|
/* Work around Clang bug <https://bugs.llvm.org/show_bug.cgi?id=16404>. */
|
|
# define _GL_HAS_BUILTIN_MUL_OVERFLOW 0
|
|
#else
|
|
# define _GL_HAS_BUILTIN_MUL_OVERFLOW _GL_HAS_BUILTIN_ADD_OVERFLOW
|
|
#endif
|
|
|
|
/* True if __builtin_add_overflow_p (A, B, C) works, and similarly for
|
|
__builtin_sub_overflow_p and __builtin_mul_overflow_p. */
|
|
#ifdef __EDG__
|
|
/* In EDG-based compilers like ICC 2021.3 and earlier,
|
|
__builtin_add_overflow_p etc. are not treated as integral constant
|
|
expressions even when all arguments are. */
|
|
# define _GL_HAS_BUILTIN_OVERFLOW_P 0
|
|
#elif defined __has_builtin
|
|
# define _GL_HAS_BUILTIN_OVERFLOW_P __has_builtin (__builtin_mul_overflow_p)
|
|
#else
|
|
# define _GL_HAS_BUILTIN_OVERFLOW_P (7 <= __GNUC__)
|
|
#endif
|
|
|
|
#if (!defined _GL_STDCKDINT_H && 202311 <= __STDC_VERSION__ \
|
|
&& ! (_GL_HAS_BUILTIN_ADD_OVERFLOW && _GL_HAS_BUILTIN_MUL_OVERFLOW))
|
|
# include <stdckdint.h>
|
|
#endif
|
|
|
|
/* Store the low-order bits of A + B, A - B, A * B, respectively, into *R.
|
|
Return 1 if the result overflows. Arguments should not have side
|
|
effects and A, B and *R can be of any integer type other than char,
|
|
bool, a bit-precise integer type, or an enumeration type. */
|
|
#if _GL_HAS_BUILTIN_ADD_OVERFLOW
|
|
# define _GL_INT_ADD_WRAPV(a, b, r) __builtin_add_overflow (a, b, r)
|
|
# define _GL_INT_SUBTRACT_WRAPV(a, b, r) __builtin_sub_overflow (a, b, r)
|
|
#elif defined ckd_add && defined ckd_sub && !defined _GL_STDCKDINT_H
|
|
# define _GL_INT_ADD_WRAPV(a, b, r) ckd_add (r, + (a), + (b))
|
|
# define _GL_INT_SUBTRACT_WRAPV(a, b, r) ckd_sub (r, + (a), + (b))
|
|
#else
|
|
# define _GL_INT_ADD_WRAPV(a, b, r) \
|
|
_GL_INT_OP_WRAPV (a, b, r, +, _GL_INT_ADD_RANGE_OVERFLOW)
|
|
# define _GL_INT_SUBTRACT_WRAPV(a, b, r) \
|
|
_GL_INT_OP_WRAPV (a, b, r, -, _GL_INT_SUBTRACT_RANGE_OVERFLOW)
|
|
#endif
|
|
#if _GL_HAS_BUILTIN_MUL_OVERFLOW
|
|
# if ((9 < __GNUC__ + (3 <= __GNUC_MINOR__) \
|
|
|| (__GNUC__ == 8 && 4 <= __GNUC_MINOR__)) \
|
|
&& !defined __EDG__)
|
|
# define _GL_INT_MULTIPLY_WRAPV(a, b, r) __builtin_mul_overflow (a, b, r)
|
|
# else
|
|
/* Work around GCC bug 91450. */
|
|
# define _GL_INT_MULTIPLY_WRAPV(a, b, r) \
|
|
((!_GL_SIGNED_TYPE_OR_EXPR (*(r)) && _GL_EXPR_SIGNED (a) && _GL_EXPR_SIGNED (b) \
|
|
&& _GL_INT_MULTIPLY_RANGE_OVERFLOW (a, b, \
|
|
(__typeof__ (*(r))) 0, \
|
|
(__typeof__ (*(r))) -1)) \
|
|
? ((void) __builtin_mul_overflow (a, b, r), 1) \
|
|
: __builtin_mul_overflow (a, b, r))
|
|
# endif
|
|
#elif defined ckd_mul && !defined _GL_STDCKDINT_H
|
|
# define _GL_INT_MULTIPLY_WRAPV(a, b, r) ckd_mul (r, + (a), + (b))
|
|
#else
|
|
# define _GL_INT_MULTIPLY_WRAPV(a, b, r) \
|
|
_GL_INT_OP_WRAPV (a, b, r, *, _GL_INT_MULTIPLY_RANGE_OVERFLOW)
|
|
#endif
|
|
|
|
/* Nonzero if this compiler has GCC bug 68193 or Clang bug 25390. See:
|
|
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68193
|
|
https://llvm.org/bugs/show_bug.cgi?id=25390
|
|
For now, assume GCC < 14 and all Clang versions generate bogus
|
|
warnings for _Generic. This matters only for compilers that
|
|
lack relevant builtins. */
|
|
#if (__GNUC__ && __GNUC__ < 14) || defined __clang__
|
|
# define _GL__GENERIC_BOGUS 1
|
|
#else
|
|
# define _GL__GENERIC_BOGUS 0
|
|
#endif
|
|
|
|
/* Store the low-order bits of A <op> B into *R, where OP specifies
|
|
the operation and OVERFLOW the overflow predicate. Return 1 if the
|
|
result overflows. Arguments should not have side effects,
|
|
and A, B and *R can be of any integer type other than char, bool, a
|
|
bit-precise integer type, or an enumeration type. */
|
|
#if 201112 <= __STDC_VERSION__ && !_GL__GENERIC_BOGUS
|
|
# define _GL_INT_OP_WRAPV(a, b, r, op, overflow) \
|
|
(_Generic \
|
|
(*(r), \
|
|
signed char: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
|
|
signed char, SCHAR_MIN, SCHAR_MAX), \
|
|
unsigned char: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
|
|
unsigned char, 0, UCHAR_MAX), \
|
|
short int: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
|
|
short int, SHRT_MIN, SHRT_MAX), \
|
|
unsigned short int: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
|
|
unsigned short int, 0, USHRT_MAX), \
|
|
int: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
|
|
int, INT_MIN, INT_MAX), \
|
|
unsigned int: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
|
|
unsigned int, 0, UINT_MAX), \
|
|
long int: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
|
|
long int, LONG_MIN, LONG_MAX), \
|
|
unsigned long int: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
|
|
unsigned long int, 0, ULONG_MAX), \
|
|
long long int: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
|
|
long long int, LLONG_MIN, LLONG_MAX), \
|
|
unsigned long long int: \
|
|
_GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
|
|
unsigned long long int, 0, ULLONG_MAX)))
|
|
#else
|
|
/* Store the low-order bits of A <op> B into *R, where OP specifies
|
|
the operation and OVERFLOW the overflow predicate. If *R is
|
|
signed, its type is ST with bounds SMIN..SMAX; otherwise its type
|
|
is UT with bounds U..UMAX. ST and UT are narrower than int.
|
|
Return 1 if the result overflows. Arguments should not have side
|
|
effects, and A, B and *R can be of any integer type other than
|
|
char, bool, a bit-precise integer type, or an enumeration type. */
|
|
# if _GL_HAVE___TYPEOF__
|
|
# define _GL_INT_OP_WRAPV_SMALLISH(a,b,r,op,overflow,st,smin,smax,ut,umax) \
|
|
(_GL_TYPE_SIGNED (__typeof__ (*(r))) \
|
|
? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, st, smin, smax) \
|
|
: _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, ut, 0, umax))
|
|
# else
|
|
# define _GL_INT_OP_WRAPV_SMALLISH(a,b,r,op,overflow,st,smin,smax,ut,umax) \
|
|
(overflow (a, b, smin, smax) \
|
|
? (overflow (a, b, 0, umax) \
|
|
? (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st), 1) \
|
|
: (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st)) < 0) \
|
|
: (overflow (a, b, 0, umax) \
|
|
? (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st)) >= 0 \
|
|
: (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a,b,op,unsigned,st), 0)))
|
|
# endif
|
|
|
|
# define _GL_INT_OP_WRAPV(a, b, r, op, overflow) \
|
|
(sizeof *(r) == sizeof (signed char) \
|
|
? _GL_INT_OP_WRAPV_SMALLISH (a, b, r, op, overflow, \
|
|
signed char, SCHAR_MIN, SCHAR_MAX, \
|
|
unsigned char, UCHAR_MAX) \
|
|
: sizeof *(r) == sizeof (short int) \
|
|
? _GL_INT_OP_WRAPV_SMALLISH (a, b, r, op, overflow, \
|
|
short int, SHRT_MIN, SHRT_MAX, \
|
|
unsigned short int, USHRT_MAX) \
|
|
: sizeof *(r) == sizeof (int) \
|
|
? (_GL_EXPR_SIGNED (*(r)) \
|
|
? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
|
|
int, INT_MIN, INT_MAX) \
|
|
: _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned int, \
|
|
unsigned int, 0, UINT_MAX)) \
|
|
: _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow))
|
|
# ifdef LLONG_MAX
|
|
# define _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow) \
|
|
(sizeof *(r) == sizeof (long int) \
|
|
? (_GL_EXPR_SIGNED (*(r)) \
|
|
? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
|
|
long int, LONG_MIN, LONG_MAX) \
|
|
: _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
|
|
unsigned long int, 0, ULONG_MAX)) \
|
|
: (_GL_EXPR_SIGNED (*(r)) \
|
|
? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
|
|
long long int, LLONG_MIN, LLONG_MAX) \
|
|
: _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long long int, \
|
|
unsigned long long int, 0, ULLONG_MAX)))
|
|
# else
|
|
# define _GL_INT_OP_WRAPV_LONGISH(a, b, r, op, overflow) \
|
|
(_GL_EXPR_SIGNED (*(r)) \
|
|
? _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
|
|
long int, LONG_MIN, LONG_MAX) \
|
|
: _GL_INT_OP_CALC (a, b, r, op, overflow, unsigned long int, \
|
|
unsigned long int, 0, ULONG_MAX))
|
|
# endif
|
|
#endif
|
|
|
|
/* Store the low-order bits of A <op> B into *R, where the operation
|
|
is given by OP. Use the unsigned type UT for calculation to avoid
|
|
overflow problems. *R's type is T, with extrema TMIN and TMAX.
|
|
T can be any signed integer type other than char, bool, a
|
|
bit-precise integer type, or an enumeration type.
|
|
Return 1 if the result overflows. */
|
|
#define _GL_INT_OP_CALC(a, b, r, op, overflow, ut, t, tmin, tmax) \
|
|
(overflow (a, b, tmin, tmax) \
|
|
? (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a, b, op, ut, t), 1) \
|
|
: (*(r) = _GL_INT_OP_WRAPV_VIA_UNSIGNED (a, b, op, ut, t), 0))
|
|
|
|
/* Return 1 if the integer expressions A - B and -A would overflow,
|
|
respectively. Arguments should not have side effects,
|
|
and can be any signed integer type other than char, bool, a
|
|
bit-precise integer type, or an enumeration type.
|
|
These macros are tuned for their last input argument being a constant. */
|
|
|
|
#if _GL_HAS_BUILTIN_OVERFLOW_P
|
|
# define _GL_INT_NEGATE_OVERFLOW(a) \
|
|
__builtin_sub_overflow_p (0, a, (__typeof__ (- (a))) 0)
|
|
#else
|
|
# define _GL_INT_NEGATE_OVERFLOW(a) \
|
|
_GL_INT_NEGATE_RANGE_OVERFLOW (a, _GL_INT_MINIMUM (a), _GL_INT_MAXIMUM (a))
|
|
#endif
|
|
|
|
/* Return the low-order bits of A <op> B, where the operation is given
|
|
by OP. Use the unsigned type UT for calculation to avoid undefined
|
|
behavior on signed integer overflow, and convert the result to type T.
|
|
UT is at least as wide as T and is no narrower than unsigned int,
|
|
T is two's complement, and there is no padding or trap representations.
|
|
Assume that converting UT to T yields the low-order bits, as is
|
|
done in all known two's-complement C compilers. E.g., see:
|
|
https://gcc.gnu.org/onlinedocs/gcc/Integers-implementation.html
|
|
|
|
According to the C standard, converting UT to T yields an
|
|
implementation-defined result or signal for values outside T's
|
|
range. However, code that works around this theoretical problem
|
|
runs afoul of a compiler bug in Oracle Studio 12.3 x86. See:
|
|
https://lists.gnu.org/r/bug-gnulib/2017-04/msg00049.html
|
|
As the compiler bug is real, don't try to work around the
|
|
theoretical problem. */
|
|
|
|
#define _GL_INT_OP_WRAPV_VIA_UNSIGNED(a, b, op, ut, t) \
|
|
((t) ((ut) (a) op (ut) (b)))
|
|
|
|
/* Return true if the numeric values A + B, A - B, A * B fall outside
|
|
the range TMIN..TMAX. Arguments should not have side effects
|
|
and can be any integer type other than char, bool,
|
|
a bit-precise integer type, or an enumeration type.
|
|
TMIN should be signed and nonpositive.
|
|
TMAX should be positive, and should be signed unless TMIN is zero. */
|
|
#define _GL_INT_ADD_RANGE_OVERFLOW(a, b, tmin, tmax) \
|
|
((b) < 0 \
|
|
? (((tmin) \
|
|
? ((_GL_EXPR_SIGNED (_GL_INT_CONVERT (a, (tmin) - (b))) || (b) < (tmin)) \
|
|
&& (a) < (tmin) - (b)) \
|
|
: (a) <= -1 - (b)) \
|
|
|| ((_GL_EXPR_SIGNED (a) ? 0 <= (a) : (tmax) < (a)) && (tmax) < (a) + (b))) \
|
|
: (a) < 0 \
|
|
? (((tmin) \
|
|
? ((_GL_EXPR_SIGNED (_GL_INT_CONVERT (b, (tmin) - (a))) || (a) < (tmin)) \
|
|
&& (b) < (tmin) - (a)) \
|
|
: (b) <= -1 - (a)) \
|
|
|| ((_GL_EXPR_SIGNED (_GL_INT_CONVERT (a, b)) || (tmax) < (b)) \
|
|
&& (tmax) < (a) + (b))) \
|
|
: (tmax) < (b) || (tmax) - (b) < (a))
|
|
#define _GL_INT_SUBTRACT_RANGE_OVERFLOW(a, b, tmin, tmax) \
|
|
(((a) < 0) == ((b) < 0) \
|
|
? ((a) < (b) \
|
|
? !(tmin) || -1 - (tmin) < (b) - (a) - 1 \
|
|
: (tmax) < (a) - (b)) \
|
|
: (a) < 0 \
|
|
? ((!_GL_EXPR_SIGNED (_GL_INT_CONVERT ((a) - (tmin), b)) && (a) - (tmin) < 0) \
|
|
|| (a) - (tmin) < (b)) \
|
|
: ((! (_GL_EXPR_SIGNED (_GL_INT_CONVERT (tmax, b)) \
|
|
&& _GL_EXPR_SIGNED (_GL_INT_CONVERT ((tmax) + (b), a))) \
|
|
&& (tmax) <= -1 - (b)) \
|
|
|| (tmax) + (b) < (a)))
|
|
#define _GL_INT_MULTIPLY_RANGE_OVERFLOW(a, b, tmin, tmax) \
|
|
((b) < 0 \
|
|
? ((a) < 0 \
|
|
? (_GL_EXPR_SIGNED (_GL_INT_CONVERT (tmax, b)) \
|
|
? (a) < (tmax) / (b) \
|
|
: ((_GL_INT_NEGATE_OVERFLOW (b) \
|
|
? _GL_INT_CONVERT (b, tmax) >> (_GL_TYPE_WIDTH (+ (b)) - 1) \
|
|
: (tmax) / -(b)) \
|
|
<= -1 - (a))) \
|
|
: _GL_INT_NEGATE_OVERFLOW (_GL_INT_CONVERT (b, tmin)) && (b) == -1 \
|
|
? (_GL_EXPR_SIGNED (a) \
|
|
? 0 < (a) + (tmin) \
|
|
: 0 < (a) && -1 - (tmin) < (a) - 1) \
|
|
: (tmin) / (b) < (a)) \
|
|
: (b) == 0 \
|
|
? 0 \
|
|
: ((a) < 0 \
|
|
? (_GL_INT_NEGATE_OVERFLOW (_GL_INT_CONVERT (a, tmin)) && (a) == -1 \
|
|
? (_GL_EXPR_SIGNED (b) ? 0 < (b) + (tmin) : -1 - (tmin) < (b) - 1) \
|
|
: (tmin) / (a) < (b)) \
|
|
: (tmax) / (b) < (a)))
|
|
|
|
#endif /* _GL_INTPROPS_INTERNAL_H */
|