callable functions#

    function fdc_initialize(data, control, status)

Set default control values and initialize private data

Parameters:

data

holds private internal data

control

is a structure containing control information (see fdc_control_type)

status

is a scalar variable of type Int32 that gives the exit status from the package. Possible values are (currently):

0
The import was successful.

    function fdc_read_specfile(control, specfile)

Read the content of a specification file, and assign values associated with given keywords to the corresponding control parameters. An in-depth discussion of specification files is available, and a detailed list of keywords with associated default values is provided in $GALAHAD/src/fdc/FDC.template. See also Table 2.1 in the Fortran documentation provided in $GALAHAD/doc/fdc.pdf for a list of how these keywords relate to the components of the control structure.

Parameters:

control	is a structure containing control information (see fdc_control_type)
specfile	is a one-dimensional array of type Vararg{Cchar} that must give the name of the specification file

    function fdc_find_dependent_rows(control, data, inform, status,
                                     m, n, A_ne, A_col, A_ptr, A_val, b,
                                     n_depen, depen)

Find dependent rows and, if any, check if $A x = b$ is consistent

Parameters:

control	is a structure containing control information (see fdc_control_type)
data	holds private internal data
inform	is a structure containing output information (see fdc_inform_type)
status	is a scalar variable of type Int32 that gives the entry and exit status from the package. Possible exit values are: 0 The run was successful. -1 An allocation error occurred. A message indicating the offending array is written on unit control.error, and the returned allocation status and a string containing the name of the offending array are held in inform.alloc_status and inform.bad_alloc respectively. -2 A deallocation error occurred. A message indicating the offending array is written on unit control.error and the returned allocation status and a string containing the name of the offending array are held in inform.alloc_status and inform.bad_alloc respectively. -3 The restrictions n > 0 and m > 0 or requirement that a type contains its relevant string ‘dense’, ‘coordinate’, ‘sparse_by_rows’, ‘diagonal’, ‘scaled_identity’, ‘identity’, ‘zero’ or ‘none’ has been violated. -5 The constraints appear to be inconsistent. -9 The analysis phase of the factorization failed; the return status from the factorization package is given in the component inform.factor_status -10 The factorization failed; the return status from the factorization package is given in the component inform.factor_status.
m	is a scalar variable of type Int32 that holds the number of rows of $A$.
n	is a scalar variable of type Int32 that holds the number of columns of $A$.
A_ne	is a scalar variable of type Int32 that holds the number of nonzero entries in $A$.
A_col	is a one-dimensional array of size A_ne and type Int32 that holds the column indices of $A$ in a row-wise storage scheme. The nonzeros must be ordered so that those in row i appear directly before those in row i+1, the order within each row is unimportant.
A_ptr	is a one-dimensional array of size n+1 and type Int32 that holds the starting position of each row of $A$, as well as the total number of entries.
A_val	is a one-dimensional array of size a_ne and type T that holds the values of the entries of the $A$ ordered as in A_col and A_ptr.
b	is a one-dimensional array of size m and type T that holds the linear term $b$ in the constraints. The i-th component of `b`, i = 1, … , m, contains $b_i$.
n_depen	is a scalar variable of type Int32 that holds the number of dependent constraints, if any.
depen	is a one-dimensional array of size m and type Int32 whose first n_depen components contain the indices of dependent constraints.

    function fdc_terminate(data, control, inform)

Deallocate all internal private storage

Parameters:

data	holds private internal data
control	is a structure containing control information (see fdc_control_type)
inform	is a structure containing output information (see fdc_inform_type)