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/* WIDE AREA INFORMATION SERVER SOFTWARE:
No guarantees or restrictions. See the readme file for the full standard
disclaimer.
Brewster@think.com
*/
/* Include file for the irhash.c file.
Implements the building functions in irext.h */
#ifndef IRHASH_H
#define IRHASH_H
#include "cdialect.h"
#include "cutil.h"
#include "irlex.h"
#include "hash.h"
#include "irlex.h" /* for MAX_WORD_LENGTH */
/* the amount of memory for word occurances (bytes) */
#define WORD_MEMORY_INIT_BLOCK_SIZE 10
/* this is the maximum number of occurances that will be stored in the
* disk table. The number of occurances will reflect the total number in
* all files. The theory is that if a word is very common, then it
* is not very useful in descriminating between files. Also, if it
* is very common, then it takes up alot of space.
* Maybe this should be dependent on the number of documents indexed.
* Therefore if a word is in every document, then it probably does not mean
* much.
* In increasing this, it may not keep all the references in the
* inverted file because the max length of an index block is governed
* by a size that can be represented in INDEX_BLOCK_SIZE_SIZE bytes.
*/
#define MAX_OCCURANCES 20000L
/* this is a flag to be put in the number_of_occurances field of a
word_entry so that it is always greater than the limit and no words will be
collected. */
#define STOP_WORD_FLAG 0x40000000
#ifdef __cplusplus
/* declare these as C style functions */
extern "C"
{
#endif /* def __cplusplus */
unsigned char *make_word_occurrance_block _AP((long size));
void free_word_occurance_block _AP((unsigned char *block));
void flush_word_occurance_buffers _AP((void));
void gc_word_occurance_buffers _AP((hashtable * the_word_memory_hashtable));
void add_stop_words _AP((hashtable *the_word_memory_hashtable));
long write_bytes_to_memory _AP((long value,long size,unsigned char* ptr));
#ifdef __cplusplus
}
#endif /* def __cplusplus */
#endif /* nded IRHASH_H */
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.