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#ifndef _DBISET_H
#define _DBISET_H
#include <rpm/rpmutil.h>
/* A single item from an index database (i.e. the "data returned"). */
typedef struct dbiIndexItem_s {
unsigned int hdrNum; /*!< header instance in db */
unsigned int tagNum; /*!< tag index in header */
} * dbiIndexItem;
/* Items retrieved from the index database.*/
typedef struct dbiIndexSet_s {
dbiIndexItem recs; /*!< array of records */
unsigned int count; /*!< number of records */
size_t alloced; /*!< alloced size */
} * dbiIndexSet;
#ifdef __cplusplus
extern "C" {
#endif
/* Create an empty index set, optionally with sizehint reservation for recs */
RPM_GNUC_INTERNAL
dbiIndexSet dbiIndexSetNew(unsigned int sizehint);
/* Reserve space for at least nrecs new records */
RPM_GNUC_INTERNAL
void dbiIndexSetGrow(dbiIndexSet set, unsigned int nrecs);
/* Sort an index set */
RPM_GNUC_INTERNAL
void dbiIndexSetSort(dbiIndexSet set);
/* Uniq an index set */
RPM_GNUC_INTERNAL
void dbiIndexSetUniq(dbiIndexSet set, int sorted);
/* Append an index set to another */
RPM_GNUC_INTERNAL
int dbiIndexSetAppendSet(dbiIndexSet set, dbiIndexSet oset, int sortset);
/**
* Append element(s) to set of index database items.
* @param set set of index database items
* @param recs array of items to append to set
* @param nrecs number of items
* @param sortset should resulting set be sorted?
* @return 0 success, 1 failure (bad args)
*/
RPM_GNUC_INTERNAL
int dbiIndexSetAppend(dbiIndexSet set, dbiIndexItem recs,
unsigned int nrecs, int sortset);
/**
* Append a single element to a set of index database items.
* @param set set of index database items
* @param hdrNum header instance in db
* @param tagNum tag index in header
* @param sortset should resulting set be sorted?
* @return 0 success, 1 failure (bad args)
*/
RPM_GNUC_INTERNAL
int dbiIndexSetAppendOne(dbiIndexSet set, unsigned int hdrNum,
unsigned int tagNum, int sortset);
/**
* Remove element(s) from set of index database items.
* @param set set of index database items
* @param recs array of items to remove from set
* @param nrecs number of items
* @param sorted array is already sorted?
* @return 0 success, 1 failure (no items found)
*/
RPM_GNUC_INTERNAL
int dbiIndexSetPrune(dbiIndexSet set, dbiIndexItem recs,
unsigned int nrecs, int sorted);
/**
* Remove an index set from another.
* @param set set of index database items
* @param oset set of entries that should be removed
* @param sorted oset is already sorted?
* @return 0 success, 1 failure (no items found)
*/
RPM_GNUC_INTERNAL
int dbiIndexSetPruneSet(dbiIndexSet set, dbiIndexSet oset, int sorted);
/* Count items in index database set. */
RPM_GNUC_INTERNAL
unsigned int dbiIndexSetCount(dbiIndexSet set);
/* Return record offset of header from element in index database set. */
RPM_GNUC_INTERNAL
unsigned int dbiIndexRecordOffset(dbiIndexSet set, unsigned int recno);
/* Return file index from element in index database set. */
RPM_GNUC_INTERNAL
unsigned int dbiIndexRecordFileNumber(dbiIndexSet set, unsigned int recno);
/* Destroy set of index database items */
RPM_GNUC_INTERNAL
dbiIndexSet dbiIndexSetFree(dbiIndexSet set);
#ifdef __cplusplus
}
#endif
#endif
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