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rpmdb/fprint.h File Reference

Identify a file name path by a unique "finger print". More...

#include "rpmhash.h"
#include "header.h"

Go to the source code of this file.

Data Structures

struct  fingerPrint_s
 Associates a trailing sub-directory and final base name with an existing directory finger print. More...

struct  fprintCache_s
 Finger print cache. More...

struct  fprintCacheEntry_s
 Finger print cache entry. More...


Defines

#define fpFree(a)   free((void *)(a).baseName)
#define FP_ENTRY_EQUAL(a, b)   (((a)->dev == (b)->dev) && ((a)->ino == (b)->ino))
#define FP_EQUAL(a, b)

Typedefs

typedef fprintCache_s * fingerPrintCache
typedef fingerPrint_s fingerPrint

Functions

int rpmdbFindFpList (rpmdb db, fingerPrint *fpList, dbiIndexSet *matchList, int numItems)
fingerPrintCache fpCacheCreate (int sizeHint)
 Create finger print cache.

void fpCacheFree (fingerPrintCache cache)
 Destroy finger print cache.

fingerPrint fpLookup (fingerPrintCache cache, const char *dirName, const char *baseName, int scareMemory)
 Return finger print of a file path.

unsigned int fpHashFunction (const void *key)
 Return hash value for a finger print.

int fpEqual (const void *key1, const void *key2)
 Compare two finger print entries.

void fpLookupList (fingerPrintCache cache, const char **dirNames, const char **baseNames, const int *dirIndexes, int fileCount, fingerPrint *fpList)
 Return finger prints of an array of file paths.

void fpLookupHeader (fingerPrintCache cache, Header h, fingerPrint *fpList)
 Return finger prints of all file names in header.

Detailed Description

Identify a file name path by a unique "finger print".

Definition in file fprint.h.

Define Documentation

#define FP_ENTRY_EQUAL (  a,
b    )     (((a)->dev == (b)->dev) && ((a)->ino == (b)->ino))
 

Definition at line 58 of file fprint.h.

#define FP_EQUAL (  a,
b    ) 
 

Value:

( \
        FP_ENTRY_EQUAL((a).entry, (b).entry) && \
        !strcmp((a).baseName, (b).baseName) && ( \
            ((a).subDir == (b).subDir) || \
            ((a).subDir && (b).subDir && !strcmp((a).subDir, (b).subDir)) \
        ) \
    )

Definition at line 61 of file fprint.h.

Referenced by fpEqual(), handleOverlappedFiles(), rpmdbFindByFile(), and rpmdbFindFpList().

#define fpFree (  a    )     free((void *)(a).baseName)
 

Definition at line 55 of file fprint.h.

Typedef Documentation

typedef struct fingerPrint_s fingerPrint
 

Todo:
Convert to pointer and make abstract.

Definition at line 19 of file fprint.h.

typedef struct fprintCache_s* fingerPrintCache
 

Definition at line 14 of file fprint.h.

Function Documentation

fingerPrintCache fpCacheCreate (  int    sizeHint ) 
 

Create finger print cache.

Parameters:
sizeHint  number of elements expected
Returns:
pointer to initialized fingerprint cache

Definition at line 13 of file fprint.c.

References fprintCache_s::ht, htCreate(), and xmalloc().

Referenced by rpmdbFindByFile(), rpmdbFindFpList(), and rpmRunTransactions().

void fpCacheFree (  fingerPrintCache    cache ) 
 

Destroy finger print cache.

Parameters:
cache  pointer to fingerprint cache

Definition at line 23 of file fprint.c.

References fprintCache_s::ht, and htFree().

Referenced by rpmdbFindByFile(), rpmdbFindFpList(), and rpmRunTransactions().

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

Compare two finger print entries.

exactly equivalent to FP_EQUAL macro.

Parameters:
key1  finger print 1
key2  finger print 2
Returns:
result of comparing key1 and key2

Definition at line 209 of file fprint.c.

References FP_EQUAL.

unsigned int fpHashFunction (  const void *    key ) 
 

Return hash value for a finger print.

Hash based on dev and inode only!

Parameters:
key  pointer to finger print entry
Returns:
hash value

Definition at line 191 of file fprint.c.

References fingerPrint_s::baseName, fprintCacheEntry_s::dev, fingerPrint_s::entry, and fprintCacheEntry_s::ino.

fingerPrint fpLookup (  fingerPrintCache    cache,
const char *    dirName,
const char *    baseName,
int    scareMemory
) 
 

Return finger print of a file path.

Parameters:
cache  pointer to fingerprint cache
dirName  leading directory name of file path
baseName  base name of file path
scareMemory 
Returns:
pointer to the finger print associated with a file path.

Definition at line 185 of file fprint.c.

References doLookup().

Referenced by rpmdbFindByFile().

void fpLookupHeader (  fingerPrintCache    cache,
Header    h,
fingerPrint *    fpList
) 
 

Return finger prints of all file names in header.

@warning: scareMemory is assumed!

Parameters:
cache  pointer to fingerprint cache
h  package header
Return values:
fpList  pointer to array of finger prints

Definition at line 247 of file fprint.c.

References fpLookupList(), HFD_t, HGE_t, int_32, RPMTAG_BASENAMES, RPMTAG_DIRINDEXES, RPMTAG_DIRNAMES, and rpmTagType.

void fpLookupList (  fingerPrintCache    cache,
const char **    dirNames,
const char **    baseNames,
const int *    dirIndexes,
int    fileCount,
fingerPrint *    fpList
) 
 

Return finger prints of an array of file paths.

@warning: scareMemory is assumed!

Parameters:
cache  pointer to fingerprint cache
dirNames  directory names
baseNames  file base names
dirIndexes  index into dirNames for each baseNames
fileCount  number of file entries
Return values:
fpList  pointer to array of finger prints

Definition at line 227 of file fprint.c.

References fingerPrint_s::baseName, doLookup(), fingerPrint_s::entry, and fingerPrint_s::subDir.

Referenced by fpLookupHeader(), rpmdbFindFpList(), and rpmRunTransactions().

Generated on Sun Feb 2 23:32:10 2003 for rpm by doxygen1.2.18