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	fprintCacheEntry_s
	Finger print cache entry. More...
struct	fprintCache_s
	Finger print cache. More...
struct	fingerPrint_s
	Associates a trailing sub-directory and final base name with an existing directory finger print. More...
Defines
#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)
	Find fingerprint matches in database.
fingerPrintCache	fpCacheCreate (int sizeHint)
	Create finger print cache.
fingerPrintCache	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.

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Detailed Description

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

Definition in file fprint.h.

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Define Documentation

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

Definition at line 53 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 56 of file fprint.h.

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

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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.

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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 hashEqualityString(), hashFunctionString(), htCreate(), and xmalloc().

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

fingerPrintCache fpCacheFree

(

fingerPrintCache

cache

)

Destroy finger print cache.

Parameters:

cache

pointer to fingerprint cache

Returns:

NULL always

Definition at line 23 of file fprint.c.

References fprintCache_s::ht, and htFree().

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

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

Compare two finger print entries.

This routine is exactly equivalent to the FP_EQUAL macro.

Parameters:

	key1	finger print 1
	key2	finger print 2

Returns:

result of comparing key1 and key2

Definition at line 216 of file fprint.c.

References FP_EQUAL.

Referenced by rpmtsRun().

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 195 of file fprint.c.

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

Referenced by rpmtsRun().

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 189 of file fprint.c.

References doLookup().

Referenced by rpmdbFindByFile().

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 236 of file fprint.c.

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

Referenced by rpmdbFindFpList(), and rpmtsRun().

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