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Annotation of cci/usr/src/man/man3/trapov.3f, revision 1.1

1.1     ! root        1: .TH TRAPOV 3F "18 July 1983"
        !             2: .UC 4
        !             3: .SH NAME
        !             4: trapov \- trap and repair floating point overflow
        !             5: .SH SYNOPSIS
        !             6: .B subroutine trapov (numesg, rtnval)
        !             7: .br
        !             8: .B double precision rtnval
        !             9: .SH DESCRIPTION
        !            10: This call sets up signal handlers to trap arithmetic exceptions
        !            11: and the use of illegal operands.
        !            12: Trapping arithmetic exceptions allows the user's program to proceed from
        !            13: instances of floating point overflow or divide by zero.
        !            14: The result of such operations will be an illegal floating point value.
        !            15: The subsequent use of the illegal operand will be trapped
        !            16: and the operand replaced by the specified value.
        !            17: .PP
        !            18: The first
        !            19: .I numesg
        !            20: occurrences of a floating point arithmetic error will cause a message
        !            21: to be written to the standard error file.
        !            22: If the resulting value is used, the value given for
        !            23: .I rtnval
        !            24: will replace the illegal operand generated by the arithmetic error.
        !            25: .I Rtnval
        !            26: must be a double precision value. For example, ``0d0'' or ``dflmax()''.
        !            27: .SH FILES
        !            28: .ie \nM /usr/ucb/lib/libF77.a
        !            29: .el /usr/lib/libF77.a
        !            30: .SH SEE ALSO
        !            31: trpfpe(3F), signal(3F), range(3F)
        !            32: .SH BUGS
        !            33: Other arithmetic exceptions can be trapped but not repaired.
        !            34: .PP
        !            35: There is no way to
        !            36: distinguish between an integer value of 32768 and the illegal
        !            37: floating point form.
        !            38: Therefore such an integer value may get replaced while repairing
        !            39: the use of an illegal operand.

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