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#ifndef APOS_UTILS_H
#define APOS_UTILS_H
/**
* @file utils.h
* Misc utils and helpers.
*/
#define ABS(a) (a < 0 ? -a : a)
#define MAX(a, b) ((a) >= (b) ? (a) : (b))
#define MAX3(a, b, c) (MAX(a, b) >= MAX(b, c) ? MAX(a, b) : MAX(b, c))
#define MAX4(a, b, c, d) \
(MAX3(a, b, c) >= MAX3(b, c, d) ? MAX3(a, b, c) : MAX3(b, c, d))
/* etc... */
#define MIN(a, b) ((a) <= (b) ? (a) : (b))
#define MIN3(a, b, c) (MIN(a, b) <= MIN(b, c) ? MIN(a, b) : MIN(b, c))
#define MIN4(a, b, c, d) \
(MIN3(a, b, c) <= MIN3(b, c, d) ? MIN3(a, b, c) : MIN3(b, c, d))
/* etc... */
#define GLUE2(x, y) x##y
#define GLUE(x, y) GLUE2(x, y)
#define QUOTE2(x) #x
#define QUOTE(x) QUOTE2(x)
#define UNUSED(x) ((void)(x))
#include <apos/builtin.h>
#if __has_builtin(__builtin_offsetof)
#define offsetof(type, member) __builtin_offsetof(type, member)
#else
#define offsetof(type, member) ((uintptr_t) & ((type *)0)->member)
#endif
#if __has_builtin(__builtin_expect)
#define likely(x) __builtin_expect(!!(x), 1)
#define unlikely(x) __builtin_expect(!!(x), 0)
#else
#define likely(x) (x)
#define unlikely(x) (x)
#endif
#define container_of(ptr, type, member) \
((type *)((char *)(ptr)-offsetof(type, member)))
#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
#define ALIGNED(x, a) ((x) % a == 0)
#define ptradd(x, y) (((vm_t)(x)) + ((vm_t)(y)))
#include <apos/types.h>
/* clang-format doesn't like _Generic, but I guess that's fine. */
#define align_up(x, y) \
_Generic((x), signed char \
: align_up_c, signed short \
: align_up_s, signed int \
: align_up_i, signed long \
: align_up_l, signed long long \
: align_up_ll, \
\
unsigned char \
: align_up_uc, unsigned short \
: align_up_us, unsigned int \
: align_up_ui, unsigned long \
: align_up_ul, unsigned long long \
: align_up_ull)((x), (y))
#define DEFINE_ALIGN_UP(name, type) \
static inline type align_up_##name(type val, type a) \
{ \
if (!a) \
return val; \
\
type rem = val % a; \
\
if (rem == 0) \
return val; \
\
return val + a - rem; \
}
DEFINE_ALIGN_UP(c, signed char);
DEFINE_ALIGN_UP(s, signed short);
DEFINE_ALIGN_UP(i, signed int);
DEFINE_ALIGN_UP(l, signed long);
DEFINE_ALIGN_UP(ll, signed long long);
DEFINE_ALIGN_UP(uc, unsigned char);
DEFINE_ALIGN_UP(us, unsigned short);
DEFINE_ALIGN_UP(ui, unsigned int);
DEFINE_ALIGN_UP(ul, unsigned long);
DEFINE_ALIGN_UP(ull, unsigned long long);
#define align_down(x, y) \
_Generic((x), signed char \
: align_down_c, signed short \
: align_down_s, signed int \
: align_down_i, signed long \
: align_down_l, signed long long \
: align_down_ll, \
\
unsigned char \
: align_down_uc, unsigned short \
: align_down_us, unsigned int \
: align_down_ui, unsigned long \
: align_down_ul, unsigned long long \
: align_down_ull)((x), (y))
#define DEFINE_ALIGN_DOWN(name, type) \
static inline type align_down_##name(type val, type a) \
{ \
if (!a) \
return val; \
\
return val - (val % a); \
}
DEFINE_ALIGN_DOWN(c, signed char);
DEFINE_ALIGN_DOWN(s, signed short);
DEFINE_ALIGN_DOWN(i, signed int);
DEFINE_ALIGN_DOWN(l, signed long);
DEFINE_ALIGN_DOWN(ll, signed long long);
DEFINE_ALIGN_DOWN(uc, unsigned char);
DEFINE_ALIGN_DOWN(us, unsigned short);
DEFINE_ALIGN_DOWN(ui, unsigned int);
DEFINE_ALIGN_DOWN(ul, unsigned long);
DEFINE_ALIGN_DOWN(ull, unsigned long long);
#define is_aligned(x, y) \
_Generic((x), signed char \
: is_aligned_c, signed short \
: is_aligned_s, signed int \
: is_aligned_i, signed long \
: is_aligned_l, signed long long \
: is_aligned_ll, \
\
unsigned char \
: is_aligned_uc, unsigned short \
: is_aligned_us, unsigned int \
: is_aligned_ui, unsigned long \
: is_aligned_ul, unsigned long long \
: is_aligned_ll)((x), (y))
#define DEFINE_ALIGNED(name, type) \
static inline bool is_aligned_##name(type val, type a) \
{ \
if (!a) \
return true; \
\
return val % a == 0; \
}
DEFINE_ALIGNED(c, signed char);
DEFINE_ALIGNED(s, signed short);
DEFINE_ALIGNED(i, signed int);
DEFINE_ALIGNED(l, signed long);
DEFINE_ALIGNED(ll, signed long long);
DEFINE_ALIGNED(uc, unsigned char);
DEFINE_ALIGNED(us, unsigned short);
DEFINE_ALIGNED(ui, unsigned int);
DEFINE_ALIGNED(ul, unsigned long);
DEFINE_ALIGNED(ull, unsigned long long);
static inline int asciinum(char c)
{
if (c >= '0' && c <= '9')
return c - '0';
else if (c >= 'A' && c <= 'F')
return c - 'A' + 10;
else if (c >= 'a' && c <= 'f')
return c - 'a' + 10;
else
return 0;
}
static inline uintmax_t convnum(const char *c, size_t len, size_t base)
{
size_t multiplier = 1;
size_t sum = 0;
for (size_t i = 0; i < len; ++i) {
sum += asciinum(c[len - 1 - i]) * multiplier;
multiplier *= base;
}
return sum;
}
#endif /* APOS_UTILS_H */
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