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50 lines
1.6 KiB
C
50 lines
1.6 KiB
C
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/* DISTRIB.H - Interface to module for handling distributions over numbers. */
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/* Copyright (c) 1995-2012 by Radford M. Neal and Peter Junteng Liu.
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*
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* Permission is granted for anyone to copy, use, modify, and distribute
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* these programs and accompanying documents for any purpose, provided
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* this copyright notice is retained and prominently displayed, and note
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* is made of any changes made to these programs. These programs and
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* documents are distributed without any warranty, express or implied.
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* As the programs were written for research purposes only, they have not
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* been tested to the degree that would be advisable in any important
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* application. All use of these programs is entirely at the user's own
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* risk.
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*/
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/* DATA STRUCTURES USED TO STORE A DISTRIBUTION LIST. Entries in the list
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* (distrib_entry) are stored in an array (distrib->list[]). */
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typedef struct distrib_entry
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{ int num; /* A positive number */
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double prop; /* Proportion for this number */
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} distrib_entry;
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typedef struct distrib
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{ struct distrib_entry *list; /* The list of numbers and proportions */
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int size; /* Number of entries in the list */
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} distrib;
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/* MACROS TO ACCESS ELEMENTS OF A DISTRIBUTION LIST. Note that indexes for
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entries start at 0. */
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#define distrib_num(d,i) \
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((d)->list[i].num) /* The number for the i'th entry */
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#define distrib_prop(d,i) \
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((d)->list[i].prop) /* The i'th entry's proportion [probability] */
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#define distrib_size(d) \
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((d)->size) /* The length of the list (integer) */
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/* PROCEDURES FOR DISTRIBUTION LISTS. */
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distrib *distrib_create (char *);
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void distrib_free (distrib *);
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int distrib_max(distrib *);
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