//
//  Utils.h
//  BulletTest
//
//  Copyright (c) 2011 Apple Inc.
//

#ifndef BulletTest_Utils_h
#define BulletTest_Utils_h

#include "btIntDefines.h"

#include <stddef.h>
#include <stdio.h>

#ifdef _WIN32
#define LARGE_FLOAT17 (1.f * powf(2, 17))
#define RANDF_16 (random_number32() * powf(2, -16))
#define RANDF_01 (random_number32() * powf(2, -32))
#define RANDF (random_number32() * powf(2, -8))
#define RANDF_m1p1 (2.0f * (random_number32() * powf(2, -32) - 1.0f))
#else
#define LARGE_FLOAT17 (0x1.0p17f)
#define RANDF_16 (random_number32() * 0x1.0p-16f)
#define RANDF_01 (random_number32() * 0x1.0p-32f)
#define RANDF (random_number32() * 0x1.0p-8f)
#define RANDF_m1p1 (2.0f * (random_number32() * 0x1.0p-32f) - 1.0f)
#endif  //_WIN32

#ifdef __cplusplus
extern "C"
{
#endif

	/*********************
     *      Timing       *
     *********************/
	extern int gReportNanoseconds;

	uint64_t ReadTicks(void);
	double TicksToCycles(uint64_t delta);  // Performance data should be reported in cycles most of the time.
	double TicksToSeconds(uint64_t delta);

	/*********************
     *    Guard Heap     *
     *********************/
	// return buffer containing count objects of size size, with guard pages in betweeen.
	// The stride between one object and the next is given by objectStride.
	// objectStride may be NULL. Objects so created are freed with GuardFree
	void *GuardCalloc(size_t count, size_t size, size_t *objectStride);
	void GuardFree(void *);
	// mark the contents of a guard buffer read-only or write-only. Return 0 on success.
	int GuardMarkReadOnly(void *);
	int GuardMarkWriteOnly(void *);
	int GuardMarkReadWrite(void *);

/*********************
     *    Printing       *
     *********************/
#define vlog(...) printf(__VA_ARGS__)
	uint32_t random_number32(void);
	uint64_t random_number64(void);

#ifdef __cplusplus
}
#endif

#endif