Detailed Description

cmin file reader

Author: Stefan Heinz

Definition in file reader_cmin.c.

#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <strings.h>
#include <ctype.h>
#include "scip/cons_linear.h"
#include "scip/cons_setppc.h"
#include "scip/cons_knapsack.h"
#include "cons_optcumulative.h"
#include "heur_optcumulative.h"
#include "reader_cmin.h"

Go to the source code of this file.

Data Structures
struct	CminInput

Macros
#define	READER_NAME "cminreader"

#define	READER_DESC "file reader for cmin file format"

#define	READER_EXTENSION "cmin"

#define	DEFAULT_FILENAME "-"

#define	DEFAULT_DUALREDUCTION TRUE

#define	DEFAULT_MIP FALSE

#define	DEFAULT_INITIAL TRUE

#define	DEFAULT_CIP TRUE

#define	DEFAULT_RELAXATION 3

Typedefs
typedef struct CminInput	CMININPUT

Functions
static void	syntaxError (SCIP scip, CMININPUT cmininput, const char *msg)

static SCIP_Bool	getNextLine (CMININPUT *cmininput)

static SCIP_Bool	isDelimChar (char c)

static SCIP_Bool	getNextToken (CMININPUT *cmininput)

static SCIP_RETCODE	findBestObjectiveValue (SCIP scip, SCIP_Real objval)

static void	createSortedEventpoints (SCIP scip, int releasedates, int deadlinedates, int starttimes, int endtimes, int startindices, int *endindices, int njobs)

static SCIP_Longint	computeMaxEnergy (int njobs, int durations, int demands, int releasedates, int deadlinedates, int starttime, int endtime)

static int	removeRedundantRows (SCIP_Longint rowtightness, int startidxs, int nrows, SCIP_Longint tightness)

static SCIP_RETCODE	createIntervalRelaxation (SCIP scip, int relaxation, int resource, SCIP_VAR vars, int durations, int demands, int capacity, int releasedates, int *deadlinedates, int njobs)

static SCIP_RETCODE	createMipFormulation (SCIP scip, int durations, int demands, int costs, int capacities, int releasedates, int deadlinedates, int njobs, int nmachines)

static SCIP_RETCODE	createMipCpFormulation (SCIP scip, int durations, int demands, int costs, int capacities, int releasedates, int deadlinedates, int njobs, int nmachines)

static SCIP_RETCODE	createCipFormulation (SCIP scip, int durations, int demands, int costs, int capacities, int releasedates, int deadlinedates, int njobs, int nmachines)

static SCIP_RETCODE	readFile (SCIP scip, CMININPUT cmininput, const char *filename)

static	SCIP_DECL_READERREAD (readerReadCmin)

SCIP_RETCODE	SCIPincludeReaderCmin (SCIP *scip)

Variables
static const char	delimchars [] = " \f\n\r\t\v"

Macro Definition Documentation

◆ READER_NAME

#define READER_NAME "cminreader"

Definition at line 49 of file reader_cmin.c.

Referenced by createCipFormulation(), createMipFormulation(), findBestObjectiveValue(), readFile(), and SCIPincludeReaderCmin().

◆ READER_DESC

#define READER_DESC "file reader for cmin file format"

Definition at line 50 of file reader_cmin.c.

Referenced by SCIPincludeReaderCmin().

◆ READER_EXTENSION

#define READER_EXTENSION "cmin"

Definition at line 51 of file reader_cmin.c.

Referenced by SCIPincludeReaderCmin().

◆ DEFAULT_FILENAME

#define DEFAULT_FILENAME "-"

name of the file including best known solutions

Definition at line 53 of file reader_cmin.c.

Referenced by SCIPincludeReaderCmin().

◆ DEFAULT_DUALREDUCTION

#define DEFAULT_DUALREDUCTION TRUE

add locks to avoid dual reductions

Definition at line 54 of file reader_cmin.c.

Referenced by SCIPincludeReaderCmin().

◆ DEFAULT_MIP

#define DEFAULT_MIP FALSE

create a MIP formulation

Definition at line 55 of file reader_cmin.c.

Referenced by SCIPincludeReaderCmin().

◆ DEFAULT_INITIAL

#define DEFAULT_INITIAL TRUE

should model constraints be in initial LP?

Definition at line 56 of file reader_cmin.c.

Referenced by SCIPincludeReaderCmin().

◆ DEFAULT_CIP

#define DEFAULT_CIP TRUE

create a CIP formulation

Definition at line 57 of file reader_cmin.c.

Referenced by SCIPincludeReaderCmin().

◆ DEFAULT_RELAXATION

#define DEFAULT_RELAXATION 3

which relaxation should be added to the maseter (0: none; 1: single; 2: edge-finding; 3: energetic-reasoning

Definition at line 58 of file reader_cmin.c.

Referenced by SCIPincludeReaderCmin().

Typedef Documentation

◆ CMININPUT

typedef struct CminInput CMININPUT

Definition at line 77 of file reader_cmin.c.

Function Documentation

◆ syntaxError()

static void syntaxError	(	SCIP *	scip,
		CMININPUT *	cmininput,
		const char *	msg
	)

static

issues an error message and marks the LP data to have errors

Parameters

scip	SCIP data structure
cmininput	CMIN reading data
msg	error message

Definition at line 81 of file reader_cmin.c.

References CminInput::haserror, CminInput::linebuf, CminInput::linenumber, NULL, SCIP_VERBLEVEL_MINIMAL, SCIPverbMessage(), CminInput::token, and TRUE.

Referenced by readFile().

◆ getNextLine()

static SCIP_Bool getNextLine ( CMININPUT * cmininput )

static

gets the next line out of the file stream

Parameters

cmininput CMIN reading data

Definition at line 99 of file reader_cmin.c.

References BMSclearMemoryArray, FALSE, CminInput::file, CminInput::haserror, CminInput::linebuf, CminInput::linenumber, CminInput::linepos, NULL, SCIP_MAXSTRLEN, SCIPdebugMessage, SCIPfgets(), and TRUE.

Referenced by getNextToken().

◆ isDelimChar()

static SCIP_Bool isDelimChar ( char c )

static

returns whether the given character is a token delimiter

Parameters

c	input character

Definition at line 132 of file reader_cmin.c.

References delimchars, and NULL.

Referenced by getNextToken().

◆ getNextToken()

static SCIP_Bool getNextToken ( CMININPUT * cmininput )

static

reads the next token from the input file into the token buffer; returns whether a token was read

Parameters

cmininput CMIN reading data

Definition at line 141 of file reader_cmin.c.

References FALSE, getNextLine(), isDelimChar(), CminInput::linebuf, CminInput::linenumber, CminInput::linepos, NULL, SCIP_MAXSTRLEN, SCIPdebugMessage, CminInput::token, and TRUE.

Referenced by readFile().

◆ findBestObjectiveValue()

static SCIP_RETCODE findBestObjectiveValue	(	SCIP *	scip,
		SCIP_Real *	objval
	)

static

method parses the best known solution for the total leftover out of the give file; if file does not exist or the problem is not listed the best known solution is set to -1 which means unknown

Parameters

scip	SCIP data structure
objval	pointer to store best known solution

Definition at line 192 of file reader_cmin.c.

References FALSE, CminInput::file, NULL, READER_NAME, SCIP_Bool, SCIP_CALL, SCIP_INVALIDCALL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_VERBLEVEL_HIGH, SCIPdebugMessage, SCIPfclose(), SCIPfgets(), SCIPfopen(), SCIPgetProbName(), SCIPgetStringParam(), SCIPinfinity(), SCIPsnprintf(), SCIPstrtok(), SCIPverbMessage(), SCIPwarningMessage(), CminInput::token, and TRUE.

Referenced by createCipFormulation().

◆ createSortedEventpoints()

static void createSortedEventpoints	(	SCIP *	scip,
		int *	releasedates,
		int *	deadlinedates,
		int *	starttimes,
		int *	endtimes,
		int *	startindices,
		int *	endindices,
		int	njobs
	)

static

initialize the sorted event point arrays

Parameters

scip	SCIP data structure
releasedates	release dates
deadlinedates	deadline dates
starttimes	array to store sorted start events
endtimes	array to store sorted end events
startindices	permutation with rspect to the start times
endindices	permutation with rspect to the end times
njobs	number of jobs

Definition at line 302 of file reader_cmin.c.

References SCIPsortIntInt().

Referenced by createIntervalRelaxation().

◆ computeMaxEnergy()

static SCIP_Longint computeMaxEnergy	(	int	njobs,
		int *	durations,
		int *	demands,
		int *	releasedates,
		int *	deadlinedates,
		int	starttime,
		int	endtime
	)

static

computes the maximum energy for all variables which correspond to jobs which start between the given start time and end time

Returns: Maximum energy for the given time window

Parameters

njobs	number of jobs
durations	durations
demands	demands
releasedates	release dates
deadlinedates	deadline dates
starttime	start time
endtime	end time

Definition at line 336 of file reader_cmin.c.

References SCIP_Longint.

Referenced by createIntervalRelaxation().

◆ removeRedundantRows()

static int removeRedundantRows	(	SCIP_Longint *	rowtightness,
		int *	startidxs,
		int	nrows,
		SCIP_Longint	tightness
	)

static

remove row which have a tightness which is smaller or equal to the given one

Returns: The number of remaining rows

Parameters

rowtightness	array containing the tightness for the previously selected rows
startidxs	array containing for each row the index for the start event
nrows	current number of rows
tightness	tightness to use to detect redundant rows

Definition at line 367 of file reader_cmin.c.

Referenced by createIntervalRelaxation().

◆ createIntervalRelaxation()

static SCIP_RETCODE createIntervalRelaxation	(	SCIP *	scip,
		int	relaxation,
		int	resource,
		SCIP_VAR **	vars,
		int *	durations,
		int *	demands,
		int	capacity,
		int *	releasedates,
		int *	deadlinedates,
		int	njobs
	)

static

create interval relaxation for given sub-problem

Parameters

scip	SCIP data structure
relaxation	a linear relaxation base on edge-finding idea or energetic-reasoning idea
resource	resource id
vars	assignment variables
durations	durations
demands	demands
capacity	machine capacity
releasedates	release dates
deadlinedates	deadline dates
njobs	number of jobs

Definition at line 394 of file reader_cmin.c.

References BMSclearMemoryArray, computeMaxEnergy(), createSortedEventpoints(), NULL, removeRedundantRows(), SCIP_CALL, SCIP_Longint, SCIP_MAXSTRLEN, SCIP_OKAY, SCIPaddCoefKnapsack(), SCIPaddCons(), SCIPallocBufferArray, SCIPcreateConsBasicKnapsack(), SCIPdebugMessage, SCIPfreeBufferArray, SCIPinfoMessage(), SCIPreleaseCons(), and SCIPsnprintf().

Referenced by createMipFormulation().

◆ createMipFormulation()

static SCIP_RETCODE createMipFormulation	(	SCIP *	scip,
		int **	durations,
		int **	demands,
		int **	costs,
		int *	capacities,
		int *	releasedates,
		int *	deadlinedates,
		int	njobs,
		int	nmachines
	)

static

create MIP formulation and CP constraints

Parameters

scip	SCIP data structure
durations	durations
demands	demands
costs	cost
capacities	machine capacities
releasedates	release dates
deadlinedates	deadline dates
njobs	number of jobs
nmachines	number of machines

Definition at line 566 of file reader_cmin.c.

References createIntervalRelaxation(), h, MAX, NULL, READER_NAME, SCIP_CALL, SCIP_Longint, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_BINARY, SCIPaddCoefKnapsack(), SCIPaddCoefLinear(), SCIPaddCoefSetppc(), SCIPaddCons(), SCIPaddVar(), SCIPallocBufferArray, SCIPcreateConsBasicKnapsack(), SCIPcreateConsBasicLinear(), SCIPcreateConsBasicSetpart(), SCIPcreateVarBasic(), SCIPfreeBufferArray, SCIPgetIntParam(), SCIPreleaseCons(), SCIPreleaseVar(), and SCIPsnprintf().

Referenced by readFile().

◆ createMipCpFormulation()

static SCIP_RETCODE createMipCpFormulation	(	SCIP *	scip,
		int **	durations,
		int **	demands,
		int **	costs,
		int *	capacities,
		int *	releasedates,
		int *	deadlinedates,
		int	njobs,
		int	nmachines
	)

static

create MIP formulation

Parameters

scip	SCIP data structure
durations	durations
demands	demands
costs	cost
capacities	machine capacities
releasedates	release dates
deadlinedates	deadline dates
njobs	number of jobs
nmachines	number of machines

Definition at line 784 of file reader_cmin.c.

References BMSclearMemoryArray, FALSE, h, MAX, NULL, SCIP_CALL, SCIP_Longint, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_IMPLINT, SCIPaddCoefKnapsack(), SCIPaddCoefLinear(), SCIPaddCoefSetppc(), SCIPaddCons(), SCIPaddVar(), SCIPallocBufferArray, SCIPcreateConsKnapsack(), SCIPcreateConsLinear(), SCIPcreateConsOptcumulative(), SCIPcreateConsSetpart(), SCIPcreateVar(), SCIPfreeBufferArray, SCIPgetNegatedVar(), SCIPreleaseCons(), SCIPreleaseVar(), SCIPsnprintf(), and TRUE.

Referenced by readFile().

◆ createCipFormulation()

static SCIP_RETCODE createCipFormulation	(	SCIP *	scip,
		int **	durations,
		int **	demands,
		int **	costs,
		int *	capacities,
		int *	releasedates,
		int *	deadlinedates,
		int	njobs,
		int	nmachines
	)

static

create CIP formulation

Parameters

scip	SCIP data structure
durations	durations
demands	demands
costs	cost
capacities	machine capacities
releasedates	release dates
deadlinedates	deadline dates
njobs	number of jobs
nmachines	number of machines

Definition at line 998 of file reader_cmin.c.

References BMSclearMemoryArray, FALSE, findBestObjectiveValue(), NULL, READER_NAME, SCIP_Bool, SCIP_CALL, SCIP_LOCKTYPE_MODEL, SCIP_MAXSTRLEN, SCIP_OKAY, SCIP_Real, SCIP_VARTYPE_BINARY, SCIP_VARTYPE_INTEGER, SCIPaddCoefSetppc(), SCIPaddCons(), SCIPaddVar(), SCIPaddVarLocksType(), SCIPallocBufferArray, SCIPcreateConsBasicSetpart(), SCIPcreateConsOptcumulative(), SCIPcreateVarBasic(), SCIPfreeBufferArray, SCIPgetBoolParam(), SCIPgetIntParam(), SCIPinitHeurOptcumulative(), SCIPreleaseCons(), SCIPreleaseVar(), SCIPsetObjlimit(), SCIPsnprintf(), and TRUE.

Referenced by readFile().

◆ readFile()

static SCIP_RETCODE readFile	(	SCIP *	scip,
		CMININPUT *	cmininput,
		const char *	filename
	)

static

read given file and create corresponding problem

Parameters

scip	SCIP data structure
cmininput	CMIN reading data
filename	file name

Definition at line 1148 of file reader_cmin.c.

References createCipFormulation(), createMipCpFormulation(), createMipFormulation(), FALSE, getNextToken(), CminInput::haserror, NULL, READER_NAME, SCIP_Bool, SCIP_CALL, SCIP_OKAY, SCIPallocBufferArray, SCIPcreateProbBasic(), SCIPdebug, SCIPdebugMessage, SCIPduplicateBufferArray, SCIPfreeBufferArray, SCIPgetBoolParam(), SCIPsplitFilename(), syntaxError(), and CminInput::token.

Referenced by SCIP_DECL_READERREAD().

◆ SCIP_DECL_READERREAD()

static SCIP_DECL_READERREAD ( readerReadCmin )

static

problem reading method of reader

Definition at line 1339 of file reader_cmin.c.

References FALSE, CminInput::file, CminInput::haserror, CminInput::linebuf, CminInput::linenumber, CminInput::linepos, NULL, readFile(), SCIP_CALL, SCIP_MAXSTRLEN, SCIP_NOFILE, SCIP_OKAY, SCIP_READERROR, SCIP_SUCCESS, SCIPallocBufferArray, SCIPfclose(), SCIPfopen(), SCIPfreeBufferArray, and CminInput::token.

◆ SCIPincludeReaderCmin()

SCIP_RETCODE SCIPincludeReaderCmin ( SCIP * scip )

includes the cp file reader in SCIP

Parameters

scip	SCIP data structure

Definition at line 1381 of file reader_cmin.c.

References DEFAULT_CIP, DEFAULT_DUALREDUCTION, DEFAULT_FILENAME, DEFAULT_INITIAL, DEFAULT_MIP, DEFAULT_RELAXATION, FALSE, NULL, READER_DESC, READER_EXTENSION, READER_NAME, SCIP_CALL, SCIP_OKAY, SCIPaddBoolParam(), SCIPaddIntParam(), SCIPaddStringParam(), SCIPincludeReaderBasic(), SCIPsetReaderRead(), and TRUE.

Referenced by runShell().

Variable Documentation

◆ delimchars

const char delimchars[] = " \f\n\r\t\v"

static

Definition at line 60 of file reader_cmin.c.

Referenced by isDelimChar().

SCIP

Detailed Description

Data Structures

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ READER_NAME

◆ READER_DESC

◆ READER_EXTENSION

◆ DEFAULT_FILENAME

◆ DEFAULT_DUALREDUCTION

◆ DEFAULT_MIP

◆ DEFAULT_INITIAL

◆ DEFAULT_CIP

◆ DEFAULT_RELAXATION

Typedef Documentation

◆ CMININPUT

Function Documentation

◆ syntaxError()

◆ getNextLine()

◆ isDelimChar()

◆ getNextToken()

◆ findBestObjectiveValue()

◆ createSortedEventpoints()

◆ computeMaxEnergy()

◆ removeRedundantRows()

◆ createIntervalRelaxation()

◆ createMipFormulation()

◆ createMipCpFormulation()

◆ createCipFormulation()

◆ readFile()

◆ SCIP_DECL_READERREAD()

◆ SCIPincludeReaderCmin()

Variable Documentation

◆ delimchars