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|
/* Network.h */
#include "../cfiles.h"
#include "../Ideq.h"
/*--------------------------------------------------------------------*/
/*
---------------------------------
forward declarations of typedef's
---------------------------------
*/
typedef struct _Network Network ;
typedef struct _Arc Arc ;
typedef struct _ArcChunk ArcChunk ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------------------------
structure to hold a network.
nnode -- number of nodes in the network.
the source node is 0, the sink node is nnode - 1
narc -- number of arcs in the network
ntrav -- number of arcs that are traversed,
used as a measure of complexity
inheads -- array of pointers used to point to the first arc
in the in list for the nodes
outheads -- array of pointers used to point to the first arc
in the out list for the nodes
chunk -- pointer to the first ArcChunk structure
msglvl -- message level, default is 0
msgFile -- message file, default is stdout
------------------------------------------------------------
*/
struct _Network {
int nnode ;
int narc ;
int ntrav ;
Arc **inheads ;
Arc **outheads ;
ArcChunk *chunk ;
int msglvl ;
FILE *msgFile ;
} ;
/*
----------------------------------------------------------------
arc structure
vertices in the arc are (first, second). there is one arc that
is linked into the out list for vertex first and the in list for
vertex second via the nextOut and nextIn fields, respectively.
----------------------------------------------------------------
*/
struct _Arc {
int first ;
int second ;
int capacity ;
int flow ;
Arc *nextOut ;
Arc *nextIn ;
} ;
/*
---------------------------------------------------------------
structure to hold a vector of arcs, used in forming the network
when the total number of arcs is not known ahead of time.
size -- dimension of base[] array
inuse -- number of arc structures in use,
next free arc is located at &base[inuse]
base -- vector of Arc structures
next -- link to the next ArcChunk structure,
used to free the storage when finished
---------------------------------------------------------------
*/
struct _ArcChunk {
int size ;
int inuse ;
Arc *base ;
ArcChunk *next ;
} ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------------------------------------
----- methods found in basics.c --------------------------------------
------------------------------------------------------------------------
*/
/*
--------------------------------------------
construct a new instance of the Network object
created -- 96jun08, cca
--------------------------------------------
*/
Network *
Network_new (
void
) ;
/*
---------------------------------------------
set the default fields of the Network object
created -- 96jun08, cca
---------------------------------------------
*/
void
Network_setDefaultFields (
Network *network
) ;
/*
---------------------------------------------
clear the data fields for a Network object
created -- 96jun08, cca
---------------------------------------------
*/
void
Network_clearData (
Network *network
) ;
/*
------------------------
free the Network object
created -- 96jun08, cca
------------------------
*/
void
Network_free (
Network *network
) ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------------------------------------
----- methods found in init.c ----------------------------------------
------------------------------------------------------------------------
*/
/*
-------------------------------------------------------------
initialize the Network object
nnode -- number of nodes in the network, must be > 2,
source node is 0, sink node is nnode - 1
narc -- number of arcs. this value can be zero if the number
of arcs is not known at initialization time.
storage for the arcs will grow as needed
created -- 96jun08, cca
-------------------------------------------------------------
*/
void
Network_init (
Network *network,
int nnode,
int narc
) ;
/*
---------------------------------
purpose -- set the message fields
created -- 96oct23, cca
---------------------------------
*/
void
Network_setMessageInfo (
Network *network,
int msglvl,
FILE *msgFile
) ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------------------------------------
----- methods found in addArc.c --------------------------------------
------------------------------------------------------------------------
*/
/*
-------------------------
add an arc to the network
created -- 96jun08, cca
-------------------------
*/
void
Network_addArc (
Network *network,
int firstNode,
int secondNode,
int capacity,
int flow
) ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------------------------------------
----- methods found in findAugmentingPath.c --------------------------
------------------------------------------------------------------------
*/
/*
-----------------------------------------------------------------
find an augmenting path from the source to the sink through node.
node -- (source, node) is an arc below capacity
delta -- capacity(source, node) - flow(source, node)
tag -- tag used to build this traversal tree
deq -- dequeue object to handle traversal,
out-nodes get put at head of list,
in-nodes get put at tail of list
tags -- tags vector for the nodes
deltas -- flow increment vector for the nodes
pred -- predecessor vector for the nodes
created -- 96jun08, cca
-----------------------------------------------------------------
*/
int
Network_findAugmentingPath (
Network *network,
int node,
int delta,
int tag,
Ideq *deq,
int tags[],
int deltas[],
int pred[]
) ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------------------------------------
----- methods found in augmentingPath.c ------------------------------
------------------------------------------------------------------------
*/
/*
----------------------------------------------------------------
given an augmenting path defined by the pred[] vector and delta,
the change in flow, augment the path from the source to the sink
created -- 86jun08, cca
----------------------------------------------------------------
*/
void
Network_augmentPath (
Network *network,
int delta,
int pred[]
) ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------------------------------------
----- methods found in findMaxFlow.c ---------------------------------
------------------------------------------------------------------------
*/
/*
----------------------------------
find the maximum flow of a network
created -- 96jun08, cca
----------------------------------
*/
void
Network_findMaxFlow (
Network *network
) ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------------------------------------
----- methods found in findMincut.c ----------------------------------
------------------------------------------------------------------------
*/
/*
--------------------------------------------------------------
mark the nodes 1 or 2 to define a min-cut,
where source in X and sink in Y.
start the search from the source node.
for x in X and y in Y
arc (x,y) is in the min-cut when flow(x,y) == capacity(x,y)
arc (y,x) is in the min-cut when flow(y,x) == 0
on return, mark[*] is filled with 1 or 2,
where the mark[source] = 1 and mark[sink] = 2
created -- 96jun08, cca
--------------------------------------------------------------
*/
void
Network_findMincutFromSource (
Network *network,
Ideq *deq,
int mark[]
) ;
/*
--------------------------------------------------------------
mark the nodes 1 or 2 to define a min-cut,
where source in X and sink in Y.
start the search from the sink node.
for x in X and y in Y
arc (x,y) is in the min-cut when flow(x,y) == capacity(x,y)
arc (y,x) is in the min-cut when flow(y,x) == 0
on return, mark[*] is filled with 1 or 2,
where the mark[source] = 1 and mark[sink] = 2
created -- 96jun08, cca
--------------------------------------------------------------
*/
void
Network_findMincutFromSink (
Network *network,
Ideq *deq,
int mark[]
) ;
/*--------------------------------------------------------------------*/
/*
------------------------------------------------------------------------
----- methods found in IO.c ------------------------------------------
------------------------------------------------------------------------
*/
/*
----------------------------------------
print the network for debugging purposes
created -- 96jun08, cca
----------------------------------------
*/
void
Network_writeForHumanEye (
Network *network,
FILE *fp
) ;
/*
---------------------------------------------------
print the network statistics for debugging purposes
created -- 96jun08, cca
---------------------------------------------------
*/
void
Network_writeStats (
Network *network,
FILE *fp
) ;
/*--------------------------------------------------------------------*/
|
