TRAPER(3F)              COMMAND REFERENCE              TRAPER(3F)



NAME
     traper - trap arithmetic errors

SYNOPSIS
     integer function traper (mask)

DESCRIPTION
     Floating point roundoff errors and floating point underflow
     are not normally trapped during execution. This routine
     enables these traps by setting status bits in the floating
     point status register. These bits remain set throughout the
     execution of a program, and the previous state is restored
     only upon exit of the program or through another call to
     traper.  If the condition occurs and trapping is enabled,
     signal SIGFPE is sent to the process. (See signal(3c).)

     The mask has the following meaning:

          Value  Meaning
             0   Do not trap either condition.
             1   Trap inexact results (roundoff) only.
             2   Trap floating underflow only.
             3   Trap both the above.

     The previous value of these bits is returned.

FILES
     /usr/lib/libF77.a
                    f77 intrinsic function (math) and startup
                    library.

RETURN VALUE
     The previous value of the mask bits is returned.

SEE ALSO
     signal(3c) and signal(3f).



















Printed 3/13/89                                                 1

%%index%%
na:312,83;
sy:395,396;
de:791,1035;
fi:1826,227;
rv:2053,186;
se:2239,159;
%%index%%000000000108