#ifndef MACROS_H
#define MACROS_H

#if ENABLE_ASSERT
#define Assert(s) if (!(s)) { __builtin_trap(); } /* *(int *)0 = 0; } */
#else
#define Assert(s)
#endif

#define ArrayCount(a) (sizeof(a)/sizeof(*(a)))

#define IntFromPtr(p) (unsigned long long)((char *)(p)/* -(char *)0 */)
#define PtrFromInt(n) (void *)(/* (char *)0+ */(n))

#define Member(T, m) (((T *)0)->m)
#define OffsetOfMember(T, m) (IntFromPtr(&Member(T, m)))

#define Min(a, b) (((a) < (b)) ? (a) : (b))
#define Max(a, b) (((a) > (b)) ? (a) : (b))

#define ClampTop(a, b) Min(a, b)
#define ClampBottom(a, b) Max(a, b)

#include <string.h>

#define MemoryZero(p, n) memset((p), 0, (n))
#define MemoryZeroStruct(p) MemoryZero((p), sizeof(*(p)))
#define MemoryZeroArray(p) MemoryZero((p), sizeof(p))

#define MemoryCopy(d, s, n) memmove((d), (s), (n))
#define MemoryCopyStruct(d, s) MemoryCopy((d), (s), Min(sizeof(*(d)), sizeof(*(s))))
#define MemoryCopyArray(d, s) MemoryCopy((d), (s), Min(sizeof(d), sizeof(s)))

#define MemoryMatch(a, b, n) (memcmp((a), (b), (n)) == 0)

#define DEG2RAD pi_F32/180.0f
#define RAD2DEG 182.0f/pi_F32

/* NOTE(pryazha): Linked lists: */

#define SLLPush(f, l, n) \
((f) == 0 ? \
((f) = (l) = (n), (n)->next = 0) : \
((l)->next = (n), (l) = (n), (n)->next = 0))
#define SLLPop(f, l) \
((f) == (l) ? \
((f) = (l) = 0) : \
((f) = (f)->next))

#define DLLPushBack_NP(f, l, n, next, prev) \
((f) == 0 ? \
((f) = (l) = (n), (n)->next = (n)->prev = 0) : \
((n)->prev = (l), (l)->next = (n), (l) = (n), (n)->next = 0))
#define DLLPushBack(f, l, n) DLLPushBack_NP(f, l, n, next, prev)
#define DLLPushFront(f, l, n) DLLPushBack_NP(f, l, n, prev, next)
#define DLLRemove(f, l, n) \
((f) == (n) ? \
((f) == (l) ? (f) = (l) = 0 : ((f) = (f)->next, (f)->prev = 0)) : \
((l) == (n) ? ((l) = (l)->prev, (l)->next = 0) : \
((n)->next->prev = (n)->prev, (n)->prev->next = (n)->next)))

#define Kilobytes(n) n*1024
#define Megabytes(n) Kilobytes(n)*1024
#define Gigabytes(n) Megabytes(n)*1024

#endif /* MACROS_H */