NAME

Math::GSL::Errno - Error Handling

SYNOPSIS

    use Math::GSL::Errno qw/:all/;
    gsl_set_error_handler_off();

    print gsl_strerror($GSL_EDOM) . "\n";

STATUS CODES

• $GSL_SUCCESS

  Success

• $GSL_FAILURE

  General Failure

• $GSL_CONTINUE

  Iteration has not converged

• $GSL_EDOM

  Domain error; used by mathematical functions when an argument value does not fall into the domain over which the function is defined (like EDOM in the C library)

• $GSL_ERANGE

  Range error; used by mathematical functions when the result value is not representable because of overflow or underflow (like ERANGE in the C library)

• $GSL_EFAULT

  Invalid Pointer

• $GSL_EINVAL

  Invalid argument. This is used to indicate various kinds of problems with passing the wrong argument to a library function (like EINVAL in the C library).Invalid argument. This is used to indicate various kinds of problems with passing the wrong argument to a library function (like EINVAL in the C library).

• $GSL_EFAILED

  Generic Failure

• $GSL_EFACTOR

  Factorization Failed

• $GSL_ESANITY

  Sanity Check Failed

• $GSL_ENOMEM

  No memory available. The system cannot allocate more virtual memory because its capacity is full (like ENOMEM in the C library). This error is reported when a GSL routine encounters problems when trying to allocate memory with malloc.

• $GSL_EBADFUNC

  Problem with user-supplied function

• $GSL_ERUNAWAY

  Iterative process is our of control

• $GSL_EMAXITER

  Exceeded max number of iterations

• $GSL_EZERODIV

  Division by zero

• $GSL_EBADTOL

  Invalid user-specified tolerance

• $GSL_ETOL

  Failed to reach the specified tolerance

• $GSL_EUNDRFLW

  Underflow

• $GSL_EOVRFLW

  Overflow

• $GSL_ELOSS

  Loss of accuracy

• $GSL_EROUND

  Failed due to roundoff error

• $GSL_EBADLEN

  Matrix/vector lengths not compatible

• $GSL_ENOTSQR

  Not a square matrix

• $GSL_ESING

  Singularity Detected

• $GSL_EDIVERGE

  Integral/Series is divergent

• $GSL_EUNSUP

  Not supported by hardware

• $GSL_EUNIMPL

  Not implemented

• $GSL_ECACHE

  Cache limit exceeded

• $GSL_ETABLE

  Table limit exceeded

• $GSL_ENOPROG

  Iteration not converging

• $GSL_ENOPROGJ

  Jacobian not improving solution

• $GSL_ETOLF

  Cannot reach tolerance in F

• $GSL_ETOLX

  Cannot reach tolerance in X

• $GSL_ETOLG

  Cannot reach tolerance in Gradient

• $GSL_EOF

  End of file

FUNCTIONS

• gsl_error

• gsl_stream_printf

• gsl_strerror($gsl_errno) - This function returns a pointer to a string describing the error code gsl_errno. For example, print ("error: gsl_strerror ($status)\n"); would print an error message like error: output range error for a status value of GSL_ERANGE.

• gsl_set_error_handler

• gsl_set_error_handler_off() - This function turns off the error handler by defining an error handler which does nothing. This will cause the program to continue after any error, so the return values from any library routines must be checked. This is the recommended behavior for production programs. The previous handler is returned (so that you can restore it later).

• gsl_set_stream_handler

• gsl_set_stream