/*
 * Copyright 2009 Samy Al Bahra.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <inttypes.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <unistd.h>

#include <ck_pr.h>

#ifndef R_REPEAT
#define R_REPEAT 200000
#endif

#define W(w, x) (uint##w##_t)((x) & (uint##w##_t)~0)

#define CK_PR_CAS_T(w, v, c, s) 										\
		{												\
			uint##w##_t t = v;									\
			bool r;											\
			r = ck_pr_cas_##w(&t, c, s);								\
			if (((c == v) && (r == false)) || ((c != v) && (r == true)) ||				\
					((r == true) && (W(w, s) != t))) {					\
				printf("FAIL [");								\
				printf("%" PRIu##w " (%" PRIu##w " -> %" PRIu##w ")"				\
					" -> %" PRIu##w "]\n",							\
						(uint##w##_t)(v), (uint##w##_t)(c), W(w, s), (uint##w##_t)(t));	\
			}											\
		}

#define CK_PR_CAS_B(w)							\
	{								\
		unsigned int __ck_i;					\
		printf("ck_pr_cas_" #w ": ");				\
		if (w < 10)						\
			printf(" ");					\
		for (__ck_i = 0; __ck_i < R_REPEAT; __ck_i++) {		\
			uint##w##_t a = random() % (uint##w##_t)-1;	\
			CK_PR_CAS_T(w, a, a + 1, (a - 1));		\
			CK_PR_CAS_T(w, a, a, (a - 1));			\
			CK_PR_CAS_T(w, a, a + 1, a);			\
		}							\
		rg_width(w);						\
		printf("  SUCCESS\n");					\
	}

#define CK_PR_CAS_W(m, w)							\
	{									\
		uint##m##_t t = -1, r = -1 & ~(uint##m##_t)(uint##w##_t)-1;	\
		ck_pr_cas_##w((uint##w##_t *)(void *)&t, (uint##w##_t)t, 0);	\
		if (t != r) {							\
			printf("FAIL [%#" PRIx##m " != %#" PRIx##m "]\n",	\
					(uint##m##_t)t, (uint##m##_t)r);	\
		}								\
	}

static void
rg_width(int m)
{

	/* Other architectures are bi-endian. */
#if !defined(__x86__) && !defined(__x86_64__)
	return;
#endif

#ifdef CK_F_PR_CAS_64
	if (m == 64) {
#if defined(CK_F_PR_CAS_32)
		CK_PR_CAS_W(64, 32);
#endif
#if defined(CK_PR_CAS_16)
		CK_PR_CAS_W(64, 16);
#endif
#if defined(CK_PR_CAS_8)
		CK_PR_CAS_W(64, 8);
#endif
	}
#endif /* CK_PR_CAS_64 */

#ifdef CK_F_PR_CAS_32
	if (m == 32) {
#if defined(CK_F_PR_CAS_16)
		CK_PR_CAS_W(32, 16);
#endif
#if defined(CK_PR_CAS_8)
		CK_PR_CAS_W(32, 8);
#endif
	}
#endif /* CK_PR_CAS_32 */

#if defined(CK_F_PR_CAS_16) && defined(CK_PR_CAS_8)
	if (m == 16) {
		CK_PR_CAS_W(16, 8);
	}
#endif /* CK_PR_CAS_16 && CK_PR_CAS_8 */

	return;
}

int
main(void)
{

	srandom((unsigned int)getpid());

#ifdef CK_F_PR_CAS_64
	CK_PR_CAS_B(64);
#endif

#ifdef CK_F_PR_CAS_32
	CK_PR_CAS_B(32);
#endif

#ifdef CK_F_PR_CAS_16
	CK_PR_CAS_B(16);
#endif

#ifdef CK_F_PR_CAS_8
	CK_PR_CAS_B(8);
#endif

#ifdef CK_F_PR_CAS_64_VALUE
	uint64_t a = 0xffffffffaaaaaaaa, b = 0x8888888800000000;

	printf("%" PRIx64 " (%" PRIx64 ") -> ", b, a);
	ck_pr_cas_64_value(&a, a, b, &b);
	printf("%" PRIx64 " (%" PRIx64 ")\n", b, a);
#endif

	return (0);
}