rpm  5.4.15
Data Structures | Typedefs | Functions | Variables
rpmhash.c File Reference

Hash table implemenation. More...

#include "system.h"
#include <rpmiotypes.h>
#include <rpmio.h>
#include <rpmhash.h>
#include "debug.h"
Include dependency graph for rpmhash.c:

Go to the source code of this file.

Data Structures

struct  hashBucket_s
 
struct  hashTable_s
 

Typedefs

typedef const void * voidptr
 
typedef struct hashBucket_shashBucket
 

Functions

static hashBucket findEntry (hashTable ht, const void *key)
 Find entry in hash table. More...
 
int hashEqualityString (const void *key1, const void *key2)
 Compare two hash table entries for equality. More...
 
rpmuint32_t hashFunctionString (rpmuint32_t h, const void *data, size_t size)
 Return hash value of a string. More...
 
void htAddEntry (hashTable ht, const void *key, const void *data)
 Add item to hash table. More...
 
int htHasEntry (hashTable ht, const void *key)
 Check for key in hash table. More...
 
int htGetEntry (hashTable ht, const void *key, const void *data, int *dataCount, const void *tableKey)
 Retrieve item from hash table. More...
 
const void ** htGetKeys (hashTable ht)
 Retrieve keys from hash table. More...
 
static void htFini (void *_ht)
 
static hashTable htGetPool (rpmioPool pool)
 
hashTable htCreate (int numBuckets, size_t keySize, int freeData, hashFunctionType fn, hashEqualityType eq)
 Create hash table. More...
 

Variables

int _ht_debug = 0
 
rpmioPool _htPool
 

Detailed Description

Hash table implemenation.

Definition in file rpmhash.c.

Typedef Documentation

typedef struct hashBucket_s* hashBucket

Definition at line 17 of file rpmhash.c.

typedef const void* voidptr

Definition at line 15 of file rpmhash.c.

Function Documentation

static hashBucket findEntry ( hashTable  ht,
const void *  key 
)
static

Find entry in hash table.

Parameters
htpointer to hash table
keypointer to key value
Returns
pointer to hash bucket of key (or NULL)

Definition at line 59 of file rpmhash.c.

References b, hashTable_s::buckets, hashTable_s::eq, hashTable_s::fn, hash(), hashBucket_s::key, hashBucket_s::next, and hashTable_s::numBuckets.

Referenced by htGetEntry(), and htHasEntry().

int hashEqualityString ( const void *  key1,
const void *  key2 
)

Compare two hash table entries for equality.

Parameters
key1entry 1
key2entry 2
Returns
0 if entries are equal

Definition at line 76 of file rpmhash.c.

Referenced by htCreate().

rpmuint32_t hashFunctionString ( rpmuint32_t  h,
const void *  data,
size_t  size 
)

Return hash value of a string.

Parameters
hhash initial value
datadata on which to calculate hash value
sizesize of data in bytes (0 will use strlen(data))
Returns
hash value

Definition at line 83 of file rpmhash.c.

References key.

Referenced by avOpendir(), avReaddir(), Fstat(), ftpLstat(), ftpStat(), genCpioListAndHeader(), htCreate(), rpmmiGrowBasename(), rpmtsCheckInstalledFiles(), and rpmxarStat().

void htAddEntry ( hashTable  ht,
const void *  key,
const void *  data 
)

Add item to hash table.

Parameters
htpointer to hash table
keypointer to key
datapointer to data value

Definition at line 150 of file rpmhash.c.

References b, hashTable_s::buckets, hashBucket_s::data, data, hashBucket_s::dataCount, hashTable_s::eq, hashTable_s::fn, hash(), hashBucket_s::key, key, hashTable_s::keySize, hashBucket_s::next, hashTable_s::numBuckets, xmalloc, and xrealloc.

Referenced by doLookup(), fpLookupSubdir(), and rpmtsAddFingerprints().

hashTable htCreate ( int  numBuckets,
size_t  keySize,
int  freeData,
hashFunctionType  fn,
hashEqualityType  eq 
)

Create hash table.

If keySize > 0, the key is duplicated within the table (which costs memory, but may be useful anyway.

Parameters
numBucketsnumber of hash buckets
keySizesize of key (0 if unknown)
freeDataShould data be freed when table is destroyed?
fnfunction to generate hash key (NULL for default)
eqfunction to compare keys for equality (NULL for default)
Returns
pointer to initialized hash table

Definition at line 277 of file rpmhash.c.

References hashTable_s::buckets, hashTable_s::eq, hashTable_s::fn, hashTable_s::freeData, hashEqualityString(), hashFunctionString(), htGetPool(), htLink(), hashTable_s::keySize, hashTable_s::numBuckets, and xcalloc().

Referenced by fpCacheCreate(), rpmtsAddFingerprints(), and rpmtsPrepare().

static void htFini ( void *  _ht)
static
int htGetEntry ( hashTable  ht,
const void *  key,
const void *  data,
int *  dataCount,
const void *  tableKey 
)

Retrieve item from hash table.

Parameters
htpointer to hash table
keypointer to key value
Return values
*datadata value from bucket
*dataCountdata value size from bucket
*tableKeykey value from bucket (may be NULL)
Returns
0 on success, 1 if the item is not found.

Definition at line 188 of file rpmhash.c.

References b, hashBucket_s::data, hashBucket_s::dataCount, findEntry(), and hashBucket_s::key.

Referenced by cacheContainsDirectory(), fpLookupSubdir(), handleOverlappedFiles(), and rpmtsCheckInstalledFiles().

const void** htGetKeys ( hashTable  ht)

Retrieve keys from hash table.

Parameters
htpointer to hash table
Returns
array of key values terminated by a NULL pointer

Definition at line 206 of file rpmhash.c.

References b, hashTable_s::buckets, hashBucket_s::data, i, hashBucket_s::key, hashBucket_s::next, hashTable_s::numBuckets, and xcalloc().

static hashTable htGetPool ( rpmioPool  pool)
static

Definition at line 263 of file rpmhash.c.

References _ht_debug, _htPool, htFini(), rpmioGetPool(), and rpmioNewPool().

Referenced by htCreate().

int htHasEntry ( hashTable  ht,
const void *  key 
)

Check for key in hash table.

Parameters
htpointer to hash table
keypointer to key value
Returns
1 if the key is present, 0 otherwise

Definition at line 181 of file rpmhash.c.

References b, and findEntry().

Variable Documentation

int _ht_debug = 0

Definition at line 13 of file rpmhash.c.

Referenced by htGetPool().

rpmioPool _htPool

Definition at line 261 of file rpmhash.c.

Referenced by htGetPool(), and rpmioClean().