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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#ifndef INCLUDE_util_h__
#define INCLUDE_util_h__
#include "common.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))))
#ifndef min
# define min(a,b) ((a) < (b) ? (a) : (b))
#endif
#ifndef max
# define max(a,b) ((a) > (b) ? (a) : (b))
#endif
/*
* Custom memory allocation wrappers
* that set error code and error message
* on allocation failure
*/
GIT_INLINE(void *) git__malloc(size_t len)
{
void *ptr = malloc(len);
if (!ptr) giterr_set_oom();
return ptr;
}
GIT_INLINE(void *) git__calloc(size_t nelem, size_t elsize)
{
void *ptr = calloc(nelem, elsize);
if (!ptr) giterr_set_oom();
return ptr;
}
GIT_INLINE(char *) git__strdup(const char *str)
{
char *ptr = strdup(str);
if (!ptr) giterr_set_oom();
return ptr;
}
GIT_INLINE(char *) git__strndup(const char *str, size_t n)
{
size_t length = 0;
char *ptr;
while (length < n && str[length])
++length;
ptr = (char*)git__malloc(length + 1);
if (length)
memcpy(ptr, str, length);
ptr[length] = '\0';
return ptr;
}
/* NOTE: This doesn't do null or '\0' checking. Watch those boundaries! */
GIT_INLINE(char *) git__substrdup(const char *start, size_t n)
{
char *ptr = (char*)git__malloc(n+1);
memcpy(ptr, start, n);
ptr[n] = '\0';
return ptr;
}
GIT_INLINE(void *) git__realloc(void *ptr, size_t size)
{
void *new_ptr = realloc(ptr, size);
if (!new_ptr) giterr_set_oom();
return new_ptr;
}
#define git__free(ptr) free(ptr)
#define STRCMP_CASESELECT(IGNORE_CASE, STR1, STR2) \
((IGNORE_CASE) ? strcasecmp((STR1), (STR2)) : strcmp((STR1), (STR2)))
#define CASESELECT(IGNORE_CASE, ICASE, CASE) \
((IGNORE_CASE) ? (ICASE) : (CASE))
extern int git__prefixcmp(const char *str, const char *prefix);
extern int git__prefixcmp_icase(const char *str, const char *prefix);
extern int git__suffixcmp(const char *str, const char *suffix);
GIT_INLINE(int) git__signum(int val)
{
return ((val > 0) - (val < 0));
}
extern int git__strtol32(int32_t *n, const char *buff, const char **end_buf, int base);
extern int git__strtol64(int64_t *n, const char *buff, const char **end_buf, int base);
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 **end, const char *sep);
extern char *git__strsep(char **end, const char *sep);
extern void git__strntolower(char *str, size_t len);
extern void git__strtolower(char *str);
GIT_INLINE(const char *) git__next_line(const char *s)
{
while (*s && *s != '\n') s++;
while (*s == '\n' || *s == '\r') s++;
return s;
}
GIT_INLINE(const void *) git__memrchr(const void *s, int c, size_t n)
{
const unsigned char *cp;
if (n != 0) {
cp = (unsigned char *)s + n;
do {
if (*(--cp) == (unsigned char)c)
return cp;
} while (--n != 0);
}
return NULL;
}
typedef int (*git__tsort_cmp)(const void *a, const void *b);
extern void git__tsort(void **dst, size_t size, git__tsort_cmp cmp);
typedef int (*git__sort_r_cmp)(const void *a, const void *b, void *payload);
extern void git__tsort_r(
void **dst, size_t size, git__sort_r_cmp cmp, void *payload);
extern void git__qsort_r(
void *els, size_t nel, size_t elsize, git__sort_r_cmp cmp, void *payload);
extern void git__insertsort_r(
void *els, size_t nel, size_t elsize, void *swapel,
git__sort_r_cmp cmp, void *payload);
/**
* @param position If non-NULL, this will be set to the position where the
* element is or would be inserted if not found.
* @return 0 if found; GIT_ENOTFOUND if not found
*/
extern int git__bsearch(
void **array,
size_t array_len,
const void *key,
int (*compare)(const void *key, const void *element),
size_t *position);
extern int git__bsearch_r(
void **array,
size_t array_len,
const void *key,
int (*compare_r)(const void *key, const void *element, void *payload),
void *payload,
size_t *position);
extern int git__strcmp_cb(const void *a, const void *b);
extern int git__strcmp(const char *a, const char *b);
extern int git__strcasecmp(const char *a, const char *b);
extern int git__strncmp(const char *a, const char *b, size_t sz);
extern int git__strncasecmp(const char *a, const char *b, size_t sz);
typedef struct {
short refcount;
void *owner;
} git_refcount;
typedef void (*git_refcount_freeptr)(void *r);
#define GIT_REFCOUNT_INC(r) { \
((git_refcount *)(r))->refcount++; \
}
#define GIT_REFCOUNT_DEC(_r, do_free) { \
git_refcount *r = (git_refcount *)(_r); \
r->refcount--; \
if (r->refcount <= 0 && r->owner == NULL) { do_free(_r); } \
}
#define GIT_REFCOUNT_OWN(r, o) { \
((git_refcount *)(r))->owner = o; \
}
#define GIT_REFCOUNT_OWNER(r) (((git_refcount *)(r))->owner)
static signed char from_hex[] = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 00 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 10 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 20 */
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, -1, -1, -1, -1, -1, -1, /* 30 */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 40 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 50 */
-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 60 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 70 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 80 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 90 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* a0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* b0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* c0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* d0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* e0 */
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* f0 */
};
GIT_INLINE(int) git__fromhex(char h)
{
return from_hex[(unsigned char) h];
}
GIT_INLINE(int) git__ishex(const char *str)
{
unsigned i;
for (i=0; i<strlen(str); i++)
if (git__fromhex(str[i]) < 0)
return 0;
return 1;
}
GIT_INLINE(size_t) git__size_t_bitmask(size_t v)
{
v--;
v |= v >> 1;
v |= v >> 2;
v |= v >> 4;
v |= v >> 8;
v |= v >> 16;
return v;
}
GIT_INLINE(size_t) git__size_t_powerof2(size_t v)
{
return git__size_t_bitmask(v) + 1;
}
GIT_INLINE(bool) git__isupper(int c)
{
return (c >= 'A' && c <= 'Z');
}
GIT_INLINE(bool) git__isalpha(int c)
{
return ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z'));
}
GIT_INLINE(bool) git__isdigit(int c)
{
return (c >= '0' && c <= '9');
}
GIT_INLINE(bool) git__isspace(int c)
{
return (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r' || c == '\v' || c == 0x85 /* Unicode CR+LF */);
}
GIT_INLINE(bool) git__iswildcard(int c)
{
return (c == '*' || c == '?' || c == '[');
}
/*
* Parse a string value as a boolean, just like Core Git
* does.
*
* Valid values for true are: 'true', 'yes', 'on'
* Valid values for false are: 'false', 'no', 'off'
*/
extern int git__parse_bool(int *out, const char *value);
/*
* Parse a string into a value as a git_time_t.
*
* Sample valid input:
* - "yesterday"
* - "July 17, 2003"
* - "2003-7-17 08:23"
*/
int git__date_parse(git_time_t *out, const char *date);
/*
* Unescapes a string in-place.
*
* Edge cases behavior:
* - "jackie\" -> "jacky\"
* - "chan\\" -> "chan\"
*/
extern size_t git__unescape(char *str);
#endif /* INCLUDE_util_h__ */
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