rpm 5.2.1

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Data Structures | Defines | Typedefs | Functions
rpmdb/fprint.h File Reference

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

`#include "rpmhash.h"`
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## 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 struct fprintCache_s * | fingerPrintCache
typedef struct fingerPrint_s | fingerPrint

## Functions

int | rpmdbFindFpList (void *_db, fingerPrint *fpList, void *_matchList, int numItems, unsigned int exclude)
| 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 scareMem)
| Return finger print of a file path.
rpmuint32_t | fpHashFunction (rpmuint32_t h, const void *data, size_t size)
| 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 rpmuint32_t *dirIndexes, rpmuint32_t fileCount, fingerPrint *fpList)
| Return finger prints of an array of file paths.

## 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 55 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 59 of file fprint.h.

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

## Typedef Documentation

typedef struct fingerPrint_s fingerPrint

Todo:
  Convert to pointer and make abstract.

Definition at line 18 of file fprint.h.

typedef struct fprintCache_s* fingerPrintCache

Definition at line 13 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 19 of file fprint.c.

References fprintCache_s::ht, 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 29 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 210 of file fprint.c.

References FP_EQUAL.

Referenced by rpmtsRun().

rpmuint32_t fpHashFunction | ( | rpmuint32_t | h,
|  | const void * | data,
|  | size_t | size
| ) |  |

Return hash value for a finger print.

Hash based on dev and inode only!

Parameters:

  h | hash initial value
  *data | finger print entry
  size | size of fingerprint entry

Returns:
  hash value

Definition at line 194 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 | scareMem
| ) |  |

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
  scareMem |

Returns:
  pointer to the finger print associated with a file path.

Definition at line 188 of file fprint.c.

References doLookup().

Referenced by rpmdbFindByFile().

void fpLookupList | ( | fingerPrintCache | cache,
|  | const char ** | dirNames,
|  | const char ** | baseNames,
|  | const rpmuint32_t * | dirIndexes,
|  | rpmuint32_t | fileCount,
|  | fingerPrint * | fpList
| ) |  |

Return finger prints of an array of file paths.

Warning:
  : scareMem 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 | array of finger prints

Definition at line 228 of file fprint.c.

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

Referenced by rpmdbFindFpList(), and rpmtsRun().