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modified post bf1c0 by Anonymous on Fri 18th Feb 2022 13:25
original post af73 by Anonymous on Mon 14th Feb 2022 18:15
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/*

1	1		/*
2	2		* C++ SIGFPE handling demo
3	3		*
4	4		* Compile with:
5	5		* $ g++ -std=gnu++17 -Wall lam1.cpp #
6	6		* $ clang++ -std=gnu++17 -Wall lam1.cpp #
7	7		*
8	8		* Written by Roland Mainz <roland.mainz@nrubsig.org>
9	9		*/
10	10
11	11		#include <stdlib.h>
12	12		#include <string.h>
13	13		#include <stdio.h>
14	14		#include <setjmp.h>
15	15		#include <signal.h>
16	16		#include <math.h>
17	17		#include <fenv.h>
18	18		#include <limits.h>
19	19
20	20		#include <stdexcept>
21	21		#include <iostream>
22	22		#include <cfloat>
23	23		#include <functional>
24	24
25	25		/* Number of elements in a C99/C++ array */
26	26		#define numelementsinarray(ar) (sizeof(ar)/sizeof((ar)[0]))
27	27
28	28
29	29		static sigjmp_buf jmp_env;
30	30		static volatile siginfo_t saved_siginfo;
31	31
	32	+	extern "C"
34	33		{
	34	+	static void sigfpe_handler(int num, siginfo_t info, void ucontext)
35	36		(void)num;
36	37		(void)ucontext;
37	38
38	39		(void)feclearexcept(FE_ALL_EXCEPT);
39	40		(void)memcpy((void *)&saved_siginfo, info, sizeof(saved_siginfo));
40	41
41		-	#if 1
42	42		siglongjmp(jmp_env, 1);
43		-	#else
44		-	throw std::invalid_argument( "you violated the fp math rules" );
45		-	#endif
46	43		}
	44	+	}
47	45
	46	+	#define DEFINE_SIGFPE_TESTCASE_FUNC(f) .func = f , .funcstr = #f ,