NAG CL Interface
e05zlc (optget)

1 Purpose

2 Specification

3 Description

4 References

5 Arguments

1: $\mathbf{optstr}$ – const char * Input

On entry: a string identifying the option whose current value is required. See Section 12 in e05sac, e05sbc and e05ucc for information on valid options. In addition, the following is a valid option:

$\mathbf{Identify}$

e05zlc returns in cvalue the function name supplied to e05zkc when the optional parameter arrays iopts and opts were initialized.

2: $\mathbf{ivalue}$ – Integer * Output

On exit: if the optional parameter supplied in optstr is an integer valued parameter, ivalue will hold its current value.

3: $\mathbf{rvalue}$ – double * Output

On exit: if the optional parameter supplied in optstr is a real valued parameter, rvalue will hold its current value.

4: $\mathbf{cvalue}$ – char * Output

Note: the string returned in cvalue will never exceed $\min \left(\mathbf{lcvalue},41\right)$ characters in length (including the null terminator).

On exit: if the optional parameter supplied in optstr is a character valued argument, cvalue will hold its current value. cvalue will also contain additional information for some integer and real valued parameters, as indicated by optype.

5: $\mathbf{lcvalue}$ – Integer Input

On entry: length of cvalue. At most $\mathbf{lcvalue}-1$ non-null characters will be written into cvalue.

Constraint: $\mathbf{lcvalue}>1$.

6: $\mathbf{optype}$ – Nag_VariableType * Output

On exit: indicates whether the optional parameter supplied in optstr is an integer, real or character valued parameter and hence which of ivalue, rvalue or cvalue holds the current value.

$\mathbf{optype}=\mathrm{Nag\_Integer}$

optstr is an integer valued optional parameter, its current value has been returned in ivalue.

$\mathbf{optype}=\mathrm{Nag\_Real}$

optstr is a real valued optional parameter, its current value has been returned in rvalue.

$\mathbf{optype}=\mathrm{Nag\_Character}$

optstr is a character valued optional parameter, its current value has been returned in cvalue.

$\mathbf{optype}=\mathrm{Nag\_Integer\_Additional}$

optstr is an integer valued optional parameter, its current value has been returned in ivalue. Additional information has been returned in cvalue.

$\mathbf{optype}=\mathrm{Nag\_Real\_Additional}$

optstr is a real valued optional parameter, its current value has been returned in rvalue. Additional information has been returned in cvalue.

7: $\mathbf{iopts}\left[\mathit{dim}\right]$ – const Integer Communication Array

Note: the dimension, $\mathit{dim}$, of this array is dictated by the requirements of associated functions that must have been previously called. This array MUST be the same array passed as argument iopts in the previous call to e05zkc.

8: $\mathbf{opts}\left[\mathit{dim}\right]$ – const double Communication Array

Note: the dimension, $\mathit{dim}$, of this array is dictated by the requirements of associated functions that must have been previously called. This array MUST be the same array passed as argument opts in the previous call to e05zkc.

9: $\mathbf{fail}$ – NagError * Input/Output

The NAG error argument (see Section 7 in the Introduction to the NAG Library CL Interface).

6 Error Indicators and Warnings

NE_ALLOC_FAIL

Dynamic memory allocation failed.
See Section 3.1.2 in the Introduction to the NAG Library CL Interface for further information.

NE_BAD_PARAM

On entry, argument $〈\mathit{\text{value}}〉$ had an illegal value.

NE_INT

On entry, $\mathbf{lcvalue}=〈\mathit{\text{value}}〉$.
Constraint: $\mathbf{lcvalue}>1$.

NE_INTERNAL_ERROR

An internal error has occurred in this function. Check the function call and any array sizes. If the call is correct then please contact NAG for assistance.
See Section 7.5 in the Introduction to the NAG Library CL Interface for further information.

NE_INVALID_OPTION

On entry, the option in optstr has not been recognized.

The arrays iopts and opts have either not been initialized, have become corrupted, or are not compatible with this option setting function.

NE_NO_LICENCE

Your licence key may have expired or may not have been installed correctly.
See Section 8 in the Introduction to the NAG Library CL Interface for further information.

NW_TRUNCATED

On entry, optstr indicates a character optional parameter, but cvalue is too short to hold the stored value. The returned value will be truncated.

7 Accuracy

8 Parallelism and Performance

9 Further Comments

10 Example