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Restore the use of system isnan() that was removed by

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check-in [ea748edecb261f2b].  See
[forum:/forumpost/d7c530ac587f59e6|forum thread d7c530ac587f59e6].

FossilOrigin-Name: b3cfe23bec0b95ca673802526704200e2396df715fdded72aa71addd7f47e0e1
This commit is contained in:
drh
2021-09-06 11:44:19 +00:00
parent e7e9539d99
commit e534c7b97f
3 changed files with 18 additions and 8 deletions
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12
src/util.c
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@@ -60,11 +60,21 @@ int sqlite3FaultSim(int iTest){
#ifndef SQLITE_OMIT_FLOATING_POINT
/*
** Return true if the floating point value is Not a Number (NaN).
**
** Use the math library isnan() function if compiled with SQLITE_HAVE_ISNAN.
** Otherwise, we have our own implementation that works on most systems.
*/
int sqlite3IsNaN(double x){
int rc; /* The value return */
#if !SQLITE_HAVE_ISNAN && !HAVE_ISNAN
u64 y;
memcpy(&y,&x,sizeof(y));
return IsNaN(y);
rc = IsNaN(y);
#else
rc = isnan(x);
#endif /* HAVE_ISNAN */
testcase( rc );
return rc;
}
#endif /* SQLITE_OMIT_FLOATING_POINT */