mirror of
https://git.proxmox.com/git/libgit2
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122 lines
3.2 KiB
C
122 lines
3.2 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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#define bitsizeof(x) (CHAR_BIT * sizeof(x))
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#define MSB(x, bits) ((x) & (~0ULL << (bitsizeof(x) - (bits))))
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#ifndef min
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# define min(a,b) ((a) < (b) ? (a) : (b))
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#endif
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/*
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* Custom memory allocation wrappers
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* that set error code and error message
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* on allocation failure
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*/
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GIT_INLINE(void *) git__malloc(size_t len)
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{
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void *ptr = malloc(len);
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if (!ptr)
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git__throw(GIT_ENOMEM, "Out of memory. Failed to allocate %d bytes.", (int)len);
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return ptr;
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}
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GIT_INLINE(void *) git__calloc(size_t nelem, size_t elsize)
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{
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void *ptr = calloc(nelem, elsize);
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if (!ptr)
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git__throw(GIT_ENOMEM, "Out of memory. Failed to allocate %d bytes.", (int)elsize);
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return ptr;
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}
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GIT_INLINE(char *) git__strdup(const char *str)
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{
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char *ptr = strdup(str);
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if (!ptr)
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git__throw(GIT_ENOMEM, "Out of memory. Failed to duplicate string");
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return ptr;
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}
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GIT_INLINE(char *) git__strndup(const char *str, size_t n)
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{
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size_t length;
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char *ptr;
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length = strlen(str);
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if (n < length)
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length = n;
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ptr = (char*)malloc(length + 1);
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if (!ptr)
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git__throw(GIT_ENOMEM, "Out of memory. Failed to duplicate string");
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memcpy(ptr, str, length);
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ptr[length] = 0;
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return ptr;
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}
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GIT_INLINE(void *) git__realloc(void *ptr, size_t size)
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{
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void *new_ptr = realloc(ptr, size);
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if (!new_ptr)
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git__throw(GIT_ENOMEM, "Out of memory. Failed to allocate %d bytes.", (int)size);
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return new_ptr;
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}
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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__strtol32(long *n, const char *buff, const char **end_buf, int base);
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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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extern char *git__strtok(char **end, const char *sep);
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extern void git__strntolower(char *str, int len);
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extern void git__strtolower(char *str);
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#define STRLEN(str) (sizeof(str) - 1)
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#define GIT_OID_LINE_LENGTH(header) (STRLEN(header) + 1 + GIT_OID_HEXSZ + 1)
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extern int git__fnmatch(const char *pattern, const char *name, int flags);
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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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