ext_t Struct Reference

Extension structure. More...

#include <data.h>

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Data Fields

int con_typeid
 Constant resource type ID.
int var_typeid
 Variable resource type ID.
int connum
 Height of the array (number of constant resources).
int varnum
 Width of the array (number of variable resources).
int ** tupleid
 Array of tuple IDs.
extnext
 Pointer to the next element in linked list. NULL if this is the last element.

Detailed Description

Extension structure.

This structure holds a so called extension of the timetable. An extension is a representation of the timetable described by the chromosomes that is easier for modules to check for errors.

tupleid is a two-dimensional array of tuple IDs. First dimension N of the array is equal to the number of resources of the chosen variable resource type. The second dimension M is equal to the number of the resources of the chosen constant resource type. tupleid[n][m] points to a tuple that uses the variable resource of the chosen type with resource ID n and the constant resource with resource ID m.

If there is more than one tuple with variable resource n and a constant resource m, one is chosen at random.

If there are no tuples that meet that criteria, the value in the array is -1

Example usage: con_typeid is a resource type ID of the "time" resource. var_typeid is a "class" resource. In this case tupleid[n][0] holds a classical representation of the timetable for the class of students with resource ID 0.

See also:
slist_t


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