1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
#ifndef H_FINGERPRINT
#define H_FINGERPRINT
/** \ingroup rpmtrans
* \file lib/fprint.h
* Identify a file name path by a unique "finger print".
*/
#include "hash.h"
#include "header.h"
/**
* Finger print cache entry.
* This is really a directory and symlink cache. We don't differentiate between
* the two. We can prepopulate it, which allows us to easily conduct "fake"
* installs of a system w/o actually mounting filesystems.
*/
struct fprintCacheEntry_s {
const char * dirName; /*!< path to existing directory */
dev_t dev; /*!< stat(2) device number */
ino_t ino; /*!< stat(2) inode number */
int isFake; /*!< (currently unused) */
};
/**
* Finger print cache.
*/
typedef /*@abstract@*/ struct fprintCache_s {
hashTable ht; /*!< hashed by dirName */
} * fingerPrintCache;
/**
* Associates a trailing sub-directory and final base name with an existing
* directory finger print.
*/
typedef struct fingerPrint_s {
/*! directory finger print entry (the directory path is stat(2)-able */
const struct fprintCacheEntry_s * entry;
/*! trailing sub-directory path (directories that are not stat(2)-able */
/*@owned@*/ /*@null@*/ const char * subDir;
/*@dependent@*/ const char * baseName; /*!< file base name */
} fingerPrint;
/* only if !scarceMemory */
/** */
#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) ( \
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)) \
) \
)
#ifdef __cplusplus
extern "C" {
#endif
/* Be carefull with the memory... assert(*fullName == '/' || !scareMemory) */
/**
* Create finger print cache.
* @param sizeHint number of elements expected
* @return pointer to initialized fingerprint cache
*/
/*@only@*/ fingerPrintCache fpCacheCreate(int sizeHint) /*@*/;
/**
* Destroy finger print cache.
* @param cache pointer to fingerprint cache
*/
void fpCacheFree(/*@only@*/ fingerPrintCache cache);
/**
* Return finger print of a file path.
* @param cache pointer to fingerprint cache
* @param dirName leading directory name of file path
* @param baseName base name of file path
* @param scareMemory
* @return pointer to the finger print associated with a file path.
*/
fingerPrint fpLookup(fingerPrintCache cache, const char * dirName,
const char * baseName, int scareMemory) /*@*/;
/**
* Return hash value for a finger print.
* Hash based on dev and inode only!
* @param key pointer to finger print entry
* @return hash value
*/
unsigned int fpHashFunction(const void * key) /*@*/;
/**
* Compare two finger print entries.
* exactly equivalent to FP_EQUAL macro.
* @param key1 finger print 1
* @param key2 finger print 2
* @return result of comparing key1 and key2
*/
int fpEqual(const void * key1, const void * key2) /*@*/;
/**
* Return finger prints of an array of file paths.
* @warning: scareMemory is assumed!
* @param cache pointer to fingerprint cache
* @param dirNames directory names
* @param baseNames file base names
* @param dirIndexes index into dirNames for each baseNames
* @param fileCount number of file entries
* @retval fpList pointer to array of finger prints
*/
void fpLookupList(fingerPrintCache cache, const char ** dirNames,
const char ** baseNames, const int * dirIndexes,
int fileCount, fingerPrint * fpList)
/*@modifies cache, *fpList @*/;
/**
* Return finger prints of all file names in header.
* @warning: scareMemory is assumed!
* @param cache pointer to fingerprint cache
* @param h package header
* @retval fpList pointer to array of finger prints
*/
void fpLookupHeader(fingerPrintCache cache, Header h, fingerPrint * fpList)
/*@modifies h, cache, *fpList @*/;
#ifdef __cplusplus
}
#endif
#endif
|
