From 82ba818ff456bcd6d56a06226e3f27e98fbb55c3 Mon Sep 17 00:00:00 2001 From: Craig Jennings Date: Thu, 14 Aug 2025 22:58:58 -0500 Subject: removing all downloaded devdocs files --- devdocs/c/numeric%2Ffenv%2Ffeexceptflag.html | 68 ---------------------------- 1 file changed, 68 deletions(-) delete mode 100644 devdocs/c/numeric%2Ffenv%2Ffeexceptflag.html (limited to 'devdocs/c/numeric%2Ffenv%2Ffeexceptflag.html') diff --git a/devdocs/c/numeric%2Ffenv%2Ffeexceptflag.html b/devdocs/c/numeric%2Ffenv%2Ffeexceptflag.html deleted file mode 100644 index 04da8f88..00000000 --- a/devdocs/c/numeric%2Ffenv%2Ffeexceptflag.html +++ /dev/null @@ -1,68 +0,0 @@ -

fegetexceptflag, fesetexceptflag

Defined in header <fenv.h> 
int fegetexceptflag( fexcept_t* flagp, int excepts );
-		 (1) (since C99) 
int fesetexceptflag( const fexcept_t* flagp, int excepts );
-		 (2) (since C99)

1) Attempts to obtain the full contents of the floating-point exception flags that are listed in the bitmask argument excepts, which is a bitwise OR of the floating-point exception macros.

-

2) Attempts to copy the full contents of the floating-point exception flags that are listed in excepts from flagp into the floating-point environment. Does not raise any exceptions, only modifies the flags.

-

The full contents of a floating-point exception flag is not necessarily a boolean value indicating whether the exception is raised or cleared. For example, it may be a struct which includes the boolean status and the address of the code that triggered the exception. These functions obtain all such content and obtain/store it in flagp in implementation-defined format.

-

Parameters

- - -
flagp - pointer to an fexcept_t object where the flags will be stored or read from
excepts - bitmask listing the exception flags to get/set

Return value

​0​ on success, non-zero otherwise.

-

Example

#include <stdio.h>
-#include <fenv.h>
- 
-#pragma STDC FENV_ACCESS ON
- 
-void show_fe_exceptions(void)
-{
-    printf("current exceptions raised: ");
-    if(fetestexcept(FE_DIVBYZERO))     printf(" FE_DIVBYZERO");
-    if(fetestexcept(FE_INEXACT))       printf(" FE_INEXACT");
-    if(fetestexcept(FE_INVALID))       printf(" FE_INVALID");
-    if(fetestexcept(FE_OVERFLOW))      printf(" FE_OVERFLOW");
-    if(fetestexcept(FE_UNDERFLOW))     printf(" FE_UNDERFLOW");
-    if(fetestexcept(FE_ALL_EXCEPT)==0) printf(" none");
-    printf("\n");
-}
- 
-int main(void)
-{
-    fexcept_t excepts;
- 
-    /* Setup a "current" set of exception flags. */
-    feraiseexcept(FE_INVALID);
-    show_fe_exceptions();
- 
-    /* Save current exception flags. */
-    fegetexceptflag(&excepts,FE_ALL_EXCEPT);
- 
-    /* Temporarily raise two other exceptions. */
-    feclearexcept(FE_ALL_EXCEPT);
-    feraiseexcept(FE_OVERFLOW | FE_INEXACT);
-    show_fe_exceptions();
- 
-    /* Restore previous exception flags. */
-    fesetexceptflag(&excepts,FE_ALL_EXCEPT);
-    show_fe_exceptions();
- 
-    return 0;
-}

Output:

-
current exceptions raised: FE_INVALID
-current exceptions raised: FE_INEXACT FE_OVERFLOW
-current exceptions raised: FE_INVALID

References

See also

-
C++ documentation for fegetexceptflag, fesetexceptflag
-

- © cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
- https://en.cppreference.com/w/c/numeric/fenv/feexceptflag -

-
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