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3a2aabdc AE |
1 | #ifndef INCLUDE_util_h__ |
2 | #define INCLUDE_util_h__ | |
3 | ||
4 | #define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0])) | |
58d06cf1 VM |
5 | #define bitsizeof(x) (CHAR_BIT * sizeof(x)) |
6 | #define MSB(x, bits) ((x) & (~0ULL << (bitsizeof(x) - (bits)))) | |
3a2aabdc | 7 | |
9f54fe48 | 8 | /* |
3f53c971 VM |
9 | * Custom memory allocation wrappers |
10 | * that set error code and error message | |
11 | * on allocation failure | |
9f54fe48 | 12 | */ |
3f53c971 VM |
13 | GIT_INLINE(void *) git__malloc(size_t len) |
14 | { | |
15 | void *ptr = malloc(len); | |
16 | if (!ptr) | |
fa59f18d | 17 | git__throw(GIT_ENOMEM, "Out of memory. Failed to allocate %d bytes.", (int)len); |
3f53c971 VM |
18 | return ptr; |
19 | } | |
20 | ||
21 | GIT_INLINE(void *) git__calloc(size_t nelem, size_t elsize) | |
22 | { | |
23 | void *ptr = calloc(nelem, elsize); | |
24 | if (!ptr) | |
fa59f18d | 25 | git__throw(GIT_ENOMEM, "Out of memory. Failed to allocate %d bytes.", (int)elsize); |
3f53c971 VM |
26 | return ptr; |
27 | } | |
28 | ||
29 | GIT_INLINE(char *) git__strdup(const char *str) | |
30 | { | |
31 | char *ptr = strdup(str); | |
32 | if (!ptr) | |
fa59f18d | 33 | git__throw(GIT_ENOMEM, "Out of memory. Failed to duplicate string"); |
3f53c971 VM |
34 | return ptr; |
35 | } | |
36 | ||
6adcb5f3 VM |
37 | GIT_INLINE(char *) git__strndup(const char *str, size_t n) |
38 | { | |
39 | size_t length; | |
40 | char *ptr; | |
41 | ||
42 | length = strlen(str); | |
43 | if (n < length) | |
44 | length = n; | |
45 | ||
f0619886 | 46 | ptr = (char*)malloc(length + 1); |
6adcb5f3 VM |
47 | if (!ptr) |
48 | git__throw(GIT_ENOMEM, "Out of memory. Failed to duplicate string"); | |
49 | ||
50 | memcpy(ptr, str, length); | |
51 | ptr[length] = 0; | |
52 | ||
53 | return ptr; | |
54 | } | |
55 | ||
3f53c971 VM |
56 | GIT_INLINE(void *) git__realloc(void *ptr, size_t size) |
57 | { | |
58 | void *new_ptr = realloc(ptr, size); | |
59 | if (!new_ptr) | |
fa59f18d | 60 | git__throw(GIT_ENOMEM, "Out of memory. Failed to allocate %d bytes.", (int)size); |
3f53c971 VM |
61 | return new_ptr; |
62 | } | |
64a47c01 | 63 | |
e035685f | 64 | extern int git__fmt(char *, size_t, const char *, ...) |
2c4b7707 | 65 | GIT_FORMAT_PRINTF(3, 4); |
e035685f VM |
66 | extern int git__prefixcmp(const char *str, const char *prefix); |
67 | extern int git__suffixcmp(const char *str, const char *suffix); | |
9eb79764 | 68 | |
c6e65aca VM |
69 | extern int git__strtol32(long *n, const char *buff, const char **end_buf, int base); |
70 | ||
f725931b VM |
71 | /* |
72 | * The dirname() function shall take a pointer to a character string | |
73 | * that contains a pathname, and return a pointer to a string that is a | |
74 | * pathname of the parent directory of that file. Trailing '/' characters | |
75 | * in the path are not counted as part of the path. | |
76 | * | |
77 | * If path does not contain a '/', then dirname() shall return a pointer to | |
78 | * the string ".". If path is a null pointer or points to an empty string, | |
79 | * dirname() shall return a pointer to the string "." . | |
80 | * | |
81 | * The `git__dirname` implementation is thread safe. The returned | |
82 | * string must be manually free'd. | |
83 | * | |
84 | * The `git__dirname_r` implementation expects a string allocated | |
85 | * by the user with big enough size. | |
86 | */ | |
87 | extern char *git__dirname(const char *path); | |
88 | extern int git__dirname_r(char *buffer, size_t bufflen, const char *path); | |
89 | ||
90 | /* | |
91 | * This function returns the basename of the file, which is the last | |
92 | * part of its full name given by fname, with the drive letter and | |
93 | * leading directories stripped off. For example, the basename of | |
94 | * c:/foo/bar/file.ext is file.ext, and the basename of a:foo is foo. | |
95 | * | |
96 | * Trailing slashes and backslashes are significant: the basename of | |
97 | * c:/foo/bar/ is an empty string after the rightmost slash. | |
98 | * | |
99 | * The `git__basename` implementation is thread safe. The returned | |
100 | * string must be manually free'd. | |
101 | * | |
102 | * The `git__basename_r` implementation expects a string allocated | |
103 | * by the user with big enough size. | |
104 | */ | |
105 | extern char *git__basename(const char *path); | |
106 | extern int git__basename_r(char *buffer, size_t bufflen, const char *path); | |
107 | ||
108 | extern const char *git__topdir(const char *path); | |
ced645ea | 109 | |
412b3887 VM |
110 | /** |
111 | * Join two paths together. Takes care of properly fixing the | |
112 | * middle slashes and everything | |
113 | * | |
995f9c34 VM |
114 | * The paths are joined together into buffer_out; this is expected |
115 | * to be an user allocated buffer of `GIT_PATH_MAX` size | |
412b3887 | 116 | */ |
995f9c34 VM |
117 | extern void git__joinpath_n(char *buffer_out, int npath, ...); |
118 | ||
119 | GIT_INLINE(void) git__joinpath(char *buffer_out, const char *path_a, const char *path_b) | |
120 | { | |
121 | git__joinpath_n(buffer_out, 2, path_a, path_b); | |
122 | } | |
412b3887 | 123 | |
e035685f | 124 | extern void git__hexdump(const char *buffer, size_t n); |
e0646b38 VM |
125 | extern uint32_t git__hash(const void *key, int len, uint32_t seed); |
126 | ||
0e465f97 | 127 | |
a7c60cfc | 128 | /** @return true if p fits into the range of a size_t */ |
f0bde7fa | 129 | GIT_INLINE(int) git__is_sizet(git_off_t p) |
a7c60cfc SP |
130 | { |
131 | size_t r = (size_t)p; | |
f0bde7fa | 132 | return p == (git_off_t)r; |
a7c60cfc SP |
133 | } |
134 | ||
e0646b38 VM |
135 | /* 32-bit cross-platform rotl */ |
136 | #ifdef _MSC_VER /* use built-in method in MSVC */ | |
137 | # define git__rotl(v, s) (uint32_t)_rotl(v, s) | |
138 | #else /* use bitops in GCC; with o2 this gets optimized to a rotl instruction */ | |
139 | # define git__rotl(v, s) (uint32_t)(((uint32_t)(v) << (s)) | ((uint32_t)(v) >> (32 - (s)))) | |
140 | #endif | |
141 | ||
0291b5b7 | 142 | extern char *git__strtok(char **end, const char *sep); |
f725931b | 143 | |
0da2c700 VM |
144 | extern void git__strntolower(char *str, int len); |
145 | extern void git__strtolower(char *str); | |
146 | ||
71db842f VM |
147 | #define STRLEN(str) (sizeof(str) - 1) |
148 | ||
72a3fe42 VM |
149 | #define GIT_OID_LINE_LENGTH(header) (STRLEN(header) + 1 + GIT_OID_HEXSZ + 1) |
150 | ||
63f91e1c CMN |
151 | extern int git__fnmatch(const char *pattern, const char *name, int flags); |
152 | ||
3a2aabdc AE |
153 | /* |
154 | * Realloc the buffer pointed at by variable 'x' so that it can hold | |
155 | * at least 'nr' entries; the number of entries currently allocated | |
156 | * is 'alloc', using the standard growing factor alloc_nr() macro. | |
157 | * | |
158 | * DO NOT USE any expression with side-effect for 'x' or 'alloc'. | |
159 | */ | |
160 | #define alloc_nr(x) (((x)+16)*3/2) | |
161 | #define ALLOC_GROW(x, nr, alloc) \ | |
162 | do { \ | |
163 | if ((nr) > alloc) { \ | |
164 | if (alloc_nr(alloc) < (nr)) \ | |
165 | alloc = (nr); \ | |
166 | else \ | |
167 | alloc = alloc_nr(alloc); \ | |
168 | x = xrealloc((x), alloc * sizeof(*(x))); \ | |
169 | } \ | |
1e5dd572 | 170 | } while (0) |
3a2aabdc AE |
171 | |
172 | #endif /* INCLUDE_util_h__ */ |