Functions
char	lp_is_mip (LinearProgram *lp)
	checks if there are integer variables in this program More...

char	lp_is_integer (LinearProgram *lp, const int j)
	checks if a given variable is integer or continuous More...

char	lp_is_binary (LinearProgram *lp, const int j)
	checks if a given variable is binary or not More...

void	lp_cols_by_type (LinearProgram lp, int binaries, int integers, int continuous)
	counts the number of binary, general integer and continuous variables in this problem More...

int	lp_cols (LinearProgram *lp)
	returns the numbef of columns (variables) in a given problem More...

int	lp_rows (LinearProgram *lp)
	returns the numbef of rows (linear constraints) in a given problem More...

int	lp_nz (LinearProgram *lp)
	returns the numbef of non-zero coefficients in the linear program rows More...

int	lp_row (LinearProgram lp, int row, int idx, double *coef)
	gets the contents of a given row (linear constraint) More...

int	lp_col (LinearProgram lp, int col, int idx, double *coef)
	gets the contents of a given column (variable) More...

double	lp_rhs (LinearProgram *lp, int row)
	return the right hand side of a given row More...

char	lp_sense (LinearProgram *lp, int row)
	returns the sense of a given constraints More...

char *	lp_row_name (LinearProgram lp, int row, char dest)
	queries a row name More...

char *	lp_col_name (LinearProgram lp, int col, char dest)
	queries a column name More...

double	lp_col_lb (LinearProgram *lp, int col)
	queries a column lower bound More...

double	lp_col_ub (LinearProgram *lp, int col)
	queries a column upper bound More...

int	lp_col_index (LinearProgram lp, const char name)
	returns the column (variable) index of a given column name More...

int	lp_row_index (LinearProgram lp, const char name)
	returns the row (linear constraint) index of a given row name More...

const double *	lp_obj_coef (LinearProgram *lp)
	return the vector with objective coefficients More...

int	lp_row_type (LinearProgram *lp, const int row)
	returns the constraint type of a given row More...

void	lp_rows_by_type (LinearProgram *lp, int rtype[])
	fills the constraint types vector More...

int *	lp_original_colummns (LinearProgram *lp)
	if this is a pre-processed problem, returns indexes of respective original columns More...

Detailed Description

Routines to query problem information

Function Documentation

◆ lp_col()

int lp_col	(	LinearProgram *	lp,
		int	col,
		int *	idx,
		double *	coef
	)

gets the contents of a given column (variable)

Parameters

lp	the (integer) linear program
col	column index
pointer	to the vector of row indexes that will be filled
pointer	to the vector of row coefficients that will be filled

Returns: number of rows that column appears

◆ lp_col_index()

int lp_col_index	(	LinearProgram *	lp,
		const char *	name
	)

returns the column (variable) index of a given column name

Parameters

lp	the (integer) linear program
name	column name

Returns: column index

◆ lp_col_lb()

double lp_col_lb	(	LinearProgram *	lp,
		int	col
	)

queries a column lower bound

Parameters

lp	the (integer) linear program
col	column index

Returns: column lower bound

◆ lp_col_name()

char* lp_col_name	(	LinearProgram *	lp,
		int	col,
		char *	dest
	)

queries a column name

Parameters

lp	the (integer) linear program
col	column index
dest	string where the column name will be saved

Returns: column name

◆ lp_col_ub()

double lp_col_ub	(	LinearProgram *	lp,
		int	col
	)

queries a column upper bound

Parameters

lp	the (integer) linear program
col	column index

Returns: column upper bound

◆ lp_cols()

int lp_cols ( LinearProgram * lp )

returns the numbef of columns (variables) in a given problem

Parameters

lp	the (integer) linear program

Returns: number of columns (variables)

◆ lp_cols_by_type()

void lp_cols_by_type	(	LinearProgram *	lp,
		int *	binaries,
		int *	integers,
		int *	continuous
	)

counts the number of binary, general integer and continuous variables in this problem

Parameters

lp	the (integer) linear program
binaries	pointer to the integer that will be used to compute the number of binary variables
integer	pointer to the integer that will be used to compute the number of general integer variables
continuous	pointer to the integer that will be used to compute the number of continuous variables

◆ lp_is_binary()

char lp_is_binary	(	LinearProgram *	lp,
		const int	j
	)

checks if a given variable is binary or not

Parameters

lp	the (integer) linear program
j	column index

Returns: 1 if variable is integer, 0 otherwise

◆ lp_is_integer()

char lp_is_integer	(	LinearProgram *	lp,
		const int	j
	)

checks if a given variable is integer or continuous

Parameters

lp	the (integer) linear program
j	column index

Returns: 1 if variable is integer, 0 otherwise

◆ lp_is_mip()

char lp_is_mip ( LinearProgram * lp )

checks if there are integer variables in this program

Parameters

lp	the (integer) linear program

Returns: 1 if there are integer variables, 0 otherwise

◆ lp_nz()

int lp_nz ( LinearProgram * lp )

returns the numbef of non-zero coefficients in the linear program rows

Parameters

lp	the (integer) linear program

Returns: number of non-zero coefficients in the linear program rows

◆ lp_obj_coef()

const double* lp_obj_coef ( LinearProgram * lp )

return the vector with objective coefficients

Parameters

lp	the (integer) linear program

Returns: vector with objective coefficients

◆ lp_original_colummns()

int* lp_original_colummns ( LinearProgram * lp )

if this is a pre-processed problem, returns indexes of respective original columns

Parameters

lp	the (integer) linear program

Returns: vector with indexes of respective original columns

◆ lp_rhs()

double lp_rhs	(	LinearProgram *	lp,
		int	row
	)

return the right hand side of a given row

Parameters

lp	the (integer) linear program

Returns: right hand side of row row

◆ lp_row()

int lp_row	(	LinearProgram *	lp,
		int	row,
		int *	idx,
		double *	coef
	)

gets the contents of a given row (linear constraint)

Parameters

lp	the (integer) linear program
row	row index
idx	pointer to the vector of indexes that will be filled
idx	pointer to the vector of coefficients that will be filled

Returns: number of non-zeros in row

◆ lp_row_index()

int lp_row_index	(	LinearProgram *	lp,
		const char *	name
	)

returns the row (linear constraint) index of a given row name

Parameters

lp	the (integer) linear program
name	row name

Returns: row index

◆ lp_row_name()

char* lp_row_name	(	LinearProgram *	lp,
		int	row,
		char *	dest
	)

queries a row name

Parameters

lp	the (integer) linear program
row	row index
dest	string where the row name will be saved

Returns: row name

◆ lp_row_type()

int lp_row_type	(	LinearProgram *	lp,
		const int	row
	)

returns the constraint type of a given row

Returns the constraint type:

0 : CONS_PARTITIONING : set partitioning constraint
1 : CONS_PACKING : set packing constraint
2 : CONS_COVERING : set covering constraints
3 : CONS_CARDINALITY : cardinality constraint
4 : CONS_KNAPSACK : knapsack constraint
5 : CONS_INV_KNAPSACK : invariant knapsack constraint
6 : CONS_FLOW_BIN : flow constraint with binary variables
7 : CONS_FLOW_INT : flow constraint with general integer variables
8 : CONS_FLOW_MX : flow constraint continuous and or integer variables
9 : CONS_VBOUND : variable bound constraint

Parameters

lp	the (integer) linear program
row	row index

Returns: constraint type

◆ lp_rows()

int lp_rows ( LinearProgram * lp )

returns the numbef of rows (linear constraints) in a given problem

Parameters

lp	the (integer) linear program

Returns: number of rows (linear constraints)

◆ lp_rows_by_type()

void lp_rows_by_type	(	LinearProgram *	lp,
		int	rtype[]
	)

fills the constraint types vector

Fills a constraint type vector:

0 : CONS_PARTITIONING : set partitioning constraint
1 : CONS_PACKING : set packing constraint
2 : CONS_COVERING : set covering constraints
3 : CONS_CARDINALITY : cardinality constraint
4 : CONS_KNAPSACK : knapsack constraint
5 : CONS_INV_KNAPSACK : invariant knapsack constraint
6 : CONS_FLOW_BIN : flow constraint with binary variables
7 : CONS_FLOW_INT : flow constraint with general integer variables
8 : CONS_FLOW_MX : flow constraint continuous and or integer variables
9 : CONS_VBOUND : variable bound constraint

Parameters

lp	the (integer) linear program
rtype	vector where constraint types will be filled

◆ lp_sense()

char lp_sense	(	LinearProgram *	lp,
		int	row
	)

returns the sense of a given constraints

Returns the sense of a given constraint:

E : : equal (=)
G : : greater-or-equal (>=)
L : : less-or-equal (<=)

Parameters

lp	the (integer) linear program
row	row index

Functions

Detailed Description

Function Documentation

◆ lp_col()

◆ lp_col_index()

◆ lp_col_lb()

◆ lp_col_name()

◆ lp_col_ub()

◆ lp_cols()

◆ lp_cols_by_type()

◆ lp_is_binary()

◆ lp_is_integer()

◆ lp_is_mip()

◆ lp_nz()

◆ lp_obj_coef()

◆ lp_original_colummns()

◆ lp_rhs()

◆ lp_row()

◆ lp_row_index()

◆ lp_row_name()

◆ lp_row_type()

◆ lp_rows()

◆ lp_rows_by_type()

◆ lp_sense()