FICO Xpress Optimization

Mosel module examples

In addition to the standard installation of Mosel and Xpress Optimizer, the environment variable MOSEL_DSO must be set to this directory in order for Mosel to be able to locate the modules.

Definition of constants of different types: Defining integer, real, string, boolean constants


Type:	Programming
Rating:	2 (easy-medium)
Description:	Language extensions provided by this module: constants: integer, real, string, boolean This functionality can also be implemented by a package.
File(s):	myconstants.c
Data file(s):	Test model myconst_test.mos

Definition of a procedure for getting solution values into an array: Implementing a subroutine


Type:	Programming
Rating:	2 (easy-medium)
Description:	Language extensions provided by this module: subroutine: procedure Similar (less generic) functionality can be provided by a package.
File(s):	solarray.c
Data file(s):	Test model solarr_test.mos

Definition of complex numbers and operators to work with them: Defining an external type with operators


Type:	Programming
Rating:	3 (intermediate)
Description:	Language extensions provided by this module: type: mathematical operators: arithmetic, constructors, assignment, comparator service: reset
File(s):	complex.c
Data file(s):	Test model complex_test.mos

Definition of type 'task' and subroutines for accessing it: Defining an external type with operators and access routines; defining module parameters and services


Type:	Programming
Rating:	4 (medium-difficult)
Description:	Language extensions provided by this module: constants: boolean type: collection of data subroutines: procedures and functions operators: constructors, assignment, comparator services: reset, accessing and enumerating parameters parameters: real, integer
File(s):	task.c
Data file(s):	Test model task_test.mos

Definition of type 'date' and subroutines for accessing it: Defining an external type with operators and access routines; defining module parameters and services


Type:	Programming
Rating:	4 (medium-difficult)
Description:	Language extensions provided by this module: constants: boolean type: system subroutines: procedures and functions operators: constructor, assignment, comparators services: reset, accessing and enumerating parameters parameter: boolean
File(s):	date.c
Data file(s):	Test model date_test.mos

Definition of three new types and operators to work with them: Defining external types with operators


Type:	Programming
Rating:	3 (intermediate)
Description:	Language extensions provided by this module: types: 3 currencies operators: constructors, assignment (with type conversion), comparators, addition (with type conversion), multiplication with numerical types (real,integer) service: reset
File(s):	euro.c
Data file(s):	Test model euro_test.mos

Basic LP/MIP solver interface for Xpress Optimizer: Using the NI matrix handling functionality, extending a type, defining parameters and subroutines, defining a callback function


Type:	Programming
Rating:	5 (difficult)
Description:	Language extensions provided by this module: type: extension of mpproblem subroutines: procedures and functions implementation of a callback function services: reset, unload, accessing and enumerating parameters parameters: real, integer, boolean constants: integer
File(s):	myxprs.c
Data file(s):	Test model myxprs_test.mos

Basic QCQP solver interface for Xpress Optimizer: Using the mmnl matrix handling functionality, extending a type, defining parameters and subroutines, defining a callback function


Type:	Programming
Rating:	5 (difficult)
Description:	Language extensions provided by this module: type: extension of mpproblem subroutines: procedures and functions implementation of a callback function services: reset, unload, accessing and enumerating parameters, module dependency parameters: real, integer, boolean constants: integer
File(s):	myqxprs.c
Data file(s):	Test model catenary_mx.mos

Declaring a static module: Module embedded in a C program


Type:	Programming
Rating:	3 (intermediate)
Description:	Declaring a static module (the module is embedded in the program instead of being a dso file) and initializing an array from data stored in the C program. The same functionality can be obtained by using I/O drivers instead of a static module (see second version of the program in file mmstatdsoio.c).
File(s):	mmstatdso.c, mmstatdsoio.c
Data file(s):	Test model meminit.mos, Test model meminitio.mos

Using the 'zlib' library to provide IO driver 'compress' functionality: Defining I/O drivers


Type:	Programming
Rating:	4 (medium-difficult)
Description:	This example module uses the 'zlib' library (see: http://www.gzip.org) to provide the I/O driver 'compress' (e.g. "zlib.compress:model.bim") for stream compression and 'gzip' (e.g. "zlib.gzip:data.gz") for handling gzip files. Language extensions provided by this module: service: 2 I/O drivers
File(s):	zlib.c

Module implementing driver 'toC' to save the compilation result to a C file: Defining an I/O driver

How best to debug a module: Creating a static module


Type:	Programming
Rating:	4 (medium-difficult)
Description:	This program includes a module in order to compile it as static. 'dsodbg' can then be executed from a debugger to work on the module. In the following lines of 'dsodbg.c' #include "my_module.c" #define SRC my_module the module name (here: my_module) has to be replaced by the name of the module to compile. Then from a debugger one can execute: dsodbg complex_test to analyse the behaviour of the module.
File(s):	dsodbg.c

Comments or suggestions about the examples? Please e-mail support@fico.com