[Help-glpk] Interface to Coin OR Osi

[xypron]

Hello Andrew,

Coin OR Osi offers an abstraction layer for different optimizers.

GLPK can be accessed via Osi either as interpreter of GMPL models or as
optimizer library.

Currently the "official" API defined in doc/GLPK.pdf does not contain all
functions necessary to use GLPK as interpreter only and to extract the model
description. Hence OSI uses these undocumented functions:

mpl_get_num_cols()
mpl_get_num_rows()
mpl_get_prob_name()
mpl_get_obj_name()
mpl_get_mat_row()
mpl_get_row_kind()
mpl_get_row_bnds()
mpl_get_row_c0()
mpl_get_row_name()
mpl_get_col_name()
mpl_get_col_bnds()
mpl_get_col_bnds()
mpl_get_col_kind()

Will you add these function to the official API?

Currently usage of the undocumented functions requires to carefully watch
the sequence of includes:
#include "glpmpl.h"
typedef MPL glp_tran;
#define _GLP_TRAN
#include "glpapi.h"

This is a bit awkward. It would be preferable if the mpl_get-function where
properly mapped to functions relying on the "abstract" glp_tran structure.

Best regards

Xypron

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