mirror of
https://git.proxmox.com/git/libgit2
synced 2025-06-21 18:24:43 +00:00
f0bde7fac0
This will allow graceful migration to 64 bit file sizes and timestamps should git's binary interface be extended to allow this.
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
#ifndef INCLUDE_util_h__
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#define INCLUDE_util_h__
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#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
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/*
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* Don't wrap malloc/calloc.
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* Use the default versions in glibc, and make
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* sure that any methods that allocate memory
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* return a GIT_ENOMEM error when allocation
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* fails.
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*/
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#define git__malloc malloc
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#define git__calloc calloc
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#define git__strdup strdup
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extern int git__fmt(char *, size_t, const char *, ...)
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GIT_FORMAT_PRINTF(3, 4);
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extern int git__prefixcmp(const char *str, const char *prefix);
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extern int git__suffixcmp(const char *str, const char *suffix);
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extern int git__dirname(char *dir, size_t n, char *path);
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extern int git__basename(char *base, size_t n, char *path);
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extern void git__hexdump(const char *buffer, size_t n);
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extern uint32_t git__hash(const void *key, int len, uint32_t seed);
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/** @return true if p fits into the range of a size_t */
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GIT_INLINE(int) git__is_sizet(git_off_t p)
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{
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size_t r = (size_t)p;
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return p == (git_off_t)r;
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}
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/* 32-bit cross-platform rotl */
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#ifdef _MSC_VER /* use built-in method in MSVC */
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# define git__rotl(v, s) (uint32_t)_rotl(v, s)
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#else /* use bitops in GCC; with o2 this gets optimized to a rotl instruction */
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# define git__rotl(v, s) (uint32_t)(((uint32_t)(v) << (s)) | ((uint32_t)(v) >> (32 - (s))))
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#endif
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/*
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* Realloc the buffer pointed at by variable 'x' so that it can hold
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* at least 'nr' entries; the number of entries currently allocated
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* is 'alloc', using the standard growing factor alloc_nr() macro.
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*
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* DO NOT USE any expression with side-effect for 'x' or 'alloc'.
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*/
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#define alloc_nr(x) (((x)+16)*3/2)
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#define ALLOC_GROW(x, nr, alloc) \
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do { \
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if ((nr) > alloc) { \
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if (alloc_nr(alloc) < (nr)) \
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alloc = (nr); \
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else \
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alloc = alloc_nr(alloc); \
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x = xrealloc((x), alloc * sizeof(*(x))); \
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} \
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} while (0)
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#endif /* INCLUDE_util_h__ */
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