mirror of
https://github.com/python/cpython.git
synced 2024-11-27 03:45:08 +08:00
51c4a324c0
This amends 6988ff02a5: memory allocation for
stginfo->ffi_type_pointer.elements in PyCSimpleType_init() should be
more generic (perhaps someday fmt->pffi_type->elements will be not a
two-elements array).
It should finally resolve #61103.
Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>
55 lines
1.7 KiB
C
55 lines
1.7 KiB
C
/* Workarounds for buggy complex number arithmetic implementations. */
|
|
|
|
#ifndef Py_HAVE_C_COMPLEX
|
|
# error "this header file should only be included if Py_HAVE_C_COMPLEX is defined"
|
|
#endif
|
|
|
|
#include <complex.h>
|
|
|
|
/* Other compilers (than clang), that claims to
|
|
implement C11 *and* define __STDC_IEC_559_COMPLEX__ - don't have
|
|
issue with CMPLX(). This is specific to glibc & clang combination:
|
|
https://sourceware.org/bugzilla/show_bug.cgi?id=26287
|
|
|
|
Here we fallback to using __builtin_complex(), available in clang
|
|
v12+. Else CMPLX implemented following C11 6.2.5p13: "Each complex type
|
|
has the same representation and alignment requirements as an array
|
|
type containing exactly two elements of the corresponding real type;
|
|
the first element is equal to the real part, and the second element
|
|
to the imaginary part, of the complex number.
|
|
*/
|
|
#if !defined(CMPLX)
|
|
# if defined(__clang__) && __has_builtin(__builtin_complex)
|
|
# define CMPLX(x, y) __builtin_complex ((double) (x), (double) (y))
|
|
# define CMPLXF(x, y) __builtin_complex ((float) (x), (float) (y))
|
|
# define CMPLXL(x, y) __builtin_complex ((long double) (x), (long double) (y))
|
|
# else
|
|
static inline double complex
|
|
CMPLX(double real, double imag)
|
|
{
|
|
double complex z;
|
|
((double *)(&z))[0] = real;
|
|
((double *)(&z))[1] = imag;
|
|
return z;
|
|
}
|
|
|
|
static inline float complex
|
|
CMPLXF(float real, float imag)
|
|
{
|
|
float complex z;
|
|
((float *)(&z))[0] = real;
|
|
((float *)(&z))[1] = imag;
|
|
return z;
|
|
}
|
|
|
|
static inline long double complex
|
|
CMPLXL(long double real, long double imag)
|
|
{
|
|
long double complex z;
|
|
((long double *)(&z))[0] = real;
|
|
((long double *)(&z))[1] = imag;
|
|
return z;
|
|
}
|
|
# endif
|
|
#endif
|