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
|
#ifndef INCLUDE_util_h__
#define INCLUDE_util_h__
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
#define bitsizeof(x) (CHAR_BIT * sizeof(x))
#define MSB(x, bits) ((x) & (~0ULL << (bitsizeof(x) - (bits))))
/*
* Don't wrap malloc/calloc.
* Use the default versions in glibc, and make
* sure that any methods that allocate memory
* return a GIT_ENOMEM error when allocation
* fails.
*/
#define git__malloc malloc
#define git__calloc calloc
#define git__strdup strdup
extern int git__fmt(char *, size_t, const char *, ...)
GIT_FORMAT_PRINTF(3, 4);
extern int git__prefixcmp(const char *str, const char *prefix);
extern int git__suffixcmp(const char *str, const char *suffix);
/*
* The dirname() function shall take a pointer to a character string
* that contains a pathname, and return a pointer to a string that is a
* pathname of the parent directory of that file. Trailing '/' characters
* in the path are not counted as part of the path.
*
* If path does not contain a '/', then dirname() shall return a pointer to
* the string ".". If path is a null pointer or points to an empty string,
* dirname() shall return a pointer to the string "." .
*
* The `git__dirname` implementation is thread safe. The returned
* string must be manually free'd.
*
* The `git__dirname_r` implementation expects a string allocated
* by the user with big enough size.
*/
extern char *git__dirname(const char *path);
extern int git__dirname_r(char *buffer, size_t bufflen, const char *path);
/*
* This function returns the basename of the file, which is the last
* part of its full name given by fname, with the drive letter and
* leading directories stripped off. For example, the basename of
* c:/foo/bar/file.ext is file.ext, and the basename of a:foo is foo.
*
* Trailing slashes and backslashes are significant: the basename of
* c:/foo/bar/ is an empty string after the rightmost slash.
*
* The `git__basename` implementation is thread safe. The returned
* string must be manually free'd.
*
* The `git__basename_r` implementation expects a string allocated
* by the user with big enough size.
*/
extern char *git__basename(const char *path);
extern int git__basename_r(char *buffer, size_t bufflen, const char *path);
extern const char *git__topdir(const char *path);
/**
* Join two paths together. Takes care of properly fixing the
* middle slashes and everything
*
* The paths are joined together into buffer_out; this is expected
* to be an user allocated buffer of `GIT_PATH_MAX` size
*/
extern void git__joinpath_n(char *buffer_out, int npath, ...);
GIT_INLINE(void) git__joinpath(char *buffer_out, const char *path_a, const char *path_b)
{
git__joinpath_n(buffer_out, 2, path_a, path_b);
}
extern void git__hexdump(const char *buffer, size_t n);
extern uint32_t git__hash(const void *key, int len, uint32_t seed);
/** @return true if p fits into the range of a size_t */
GIT_INLINE(int) git__is_sizet(git_off_t p)
{
size_t r = (size_t)p;
return p == (git_off_t)r;
}
/* 32-bit cross-platform rotl */
#ifdef _MSC_VER /* use built-in method in MSVC */
# define git__rotl(v, s) (uint32_t)_rotl(v, s)
#else /* use bitops in GCC; with o2 this gets optimized to a rotl instruction */
# define git__rotl(v, s) (uint32_t)(((uint32_t)(v) << (s)) | ((uint32_t)(v) >> (32 - (s))))
#endif
extern char *git__strtok(char *output, char *src, char *delimit);
extern char *git__strtok_keep(char *output, char *src, char *delimit);
#define STRLEN(str) (sizeof(str) - 1)
/*
* Realloc the buffer pointed at by variable 'x' so that it can hold
* at least 'nr' entries; the number of entries currently allocated
* is 'alloc', using the standard growing factor alloc_nr() macro.
*
* DO NOT USE any expression with side-effect for 'x' or 'alloc'.
*/
#define alloc_nr(x) (((x)+16)*3/2)
#define ALLOC_GROW(x, nr, alloc) \
do { \
if ((nr) > alloc) { \
if (alloc_nr(alloc) < (nr)) \
alloc = (nr); \
else \
alloc = alloc_nr(alloc); \
x = xrealloc((x), alloc * sizeof(*(x))); \
} \
} while (0)
#endif /* INCLUDE_util_h__ */
|
