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272 lines
7.2 KiB
C++
272 lines
7.2 KiB
C++
/* -*- mode: C++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
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// vim: ft=cpp:expandtab:ts=8:sw=4:softtabstop=4:
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#ident "$Id$"
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/*======
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This file is part of TokuDB
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Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved.
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TokuDBis is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2,
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as published by the Free Software Foundation.
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TokuDB is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with TokuDB. If not, see <http://www.gnu.org/licenses/>.
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======= */
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#ident "Copyright (c) 2006, 2015, Percona and/or its affiliates. All rights reserved."
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#include <stdio.h>
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#include <stdint.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <sys/types.h>
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#include <tokudb_math.h>
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using namespace tokudb;
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static int64_t sign_extend(uint length_bits, int64_t n) {
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return n | ~((1ULL<<(length_bits-1))-1);
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}
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static void test_int_range(uint length_bits) {
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assert(int_high_endpoint(length_bits) == (int64_t)((1ULL<<(length_bits-1))-1));
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assert(int_low_endpoint(length_bits) == sign_extend(length_bits, 1ULL<<(length_bits-1)));
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}
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static void test_int8() {
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printf("%s\n", __FUNCTION__);
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test_int_range(8);
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int64_t max = (1LL << 7);
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for (int64_t x = -max; x <= max-1; x++) {
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for (int64_t y = -max; y <= max-1; y++) {
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bool over;
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int64_t n, m;
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n = int_add(x, y, 8, &over);
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m = x + y;
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if (m > max-1)
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assert(over);
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else if (m < -max)
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assert(over);
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else {
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assert(!over);
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assert(n == m);
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}
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n = int_sub(x, y, 8, &over);
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m = x - y;
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if (m > max-1)
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assert(over);
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else if (m < -max)
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assert(over);
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else {
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assert(!over);
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asset(n == m);
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}
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}
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}
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}
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static void test_int16() {
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printf("%s\n", __FUNCTION__);
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test_int_range(16);
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int64_t max = (1LL << 15);
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for (int64_t x = -max; x <= max-1; x++) {
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for (int64_t y = -max; y <= max-1; y++) {
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bool over;
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int64_t n, m;
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n = int_add(x, y, 16, &over);
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m = x + y;
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if (m > max-1)
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assert(over);
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else if (m < -max)
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assert(over);
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else {
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assert(!over);
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assert(n == m);
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}
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n = int_sub(x, y, 16, &over);
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m = x - y;
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if (m > max-1)
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assert(over);
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else if (m < -max)
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assert(over);
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else {
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assert(!over);
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assert(n == m);
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}
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}
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}
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}
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static void test_int24() {
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printf("%s\n", __FUNCTION__);
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test_int_range(24);
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int64_t s;
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bool over;
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s = int_add(1, (1ULL<<23)-1, 24, &over); assert(over);
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s = int_add((1ULL<<23)-1, 1, 24, &over); assert(over);
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s = int_sub(-1, (1ULL<<23), 24, &over);
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assert(!over);
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assert(s == (1ULL<<23)-1);
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s = int_sub((1ULL<<23), 1, 24, &over); assert(over);
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s = int_add(0, 0, 24, &over);
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assert(!over);
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assert(s == 0);
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s = int_sub(0, 0, 24, &over);
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assert(!over);
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assert(s == 0);
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s = int_add(0, -1, 24, &over);
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assert(!over);
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assert(s == -1);
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s = int_sub(0, 1, 24, &over);
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assert(!over);
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assert(s == -1);
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s = int_add(0, (1ULL<<23), 24, &over);
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assert(!over);
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assert((s & ((1ULL<<24)-1)) == (1ULL<<23));
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s = int_sub(0, (1ULL<<23)-1, 24, &over);
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assert(!over);
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assert((s & ((1ULL<<24)-1)) == (1ULL<<23)+1);
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s = int_add(-1, 0, 24, &over);
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assert(!over);
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assert(s == -1);
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s = int_add(-1, 1, 24, &over);
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assert(!over);
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assert(s == 0);
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s = int_sub(-1, -1, 24, &over);
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assert(!over);
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assert(s == 0);
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s = int_sub(-1, (1ULL<<23)-1, 24, &over);
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assert(!over);
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assert((s & ((1ULL<<24)-1)) == (1ULL<<23));
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}
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static void test_int32() {
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printf("%s\n", __FUNCTION__);
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test_int_range(32);
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int64_t s;
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bool over;
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s = int_add(1, (1ULL<<31)-1, 32, &over); assert(over);
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s = int_add((1ULL<<31)-1, 1, 32, &over); assert(over);
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s = int_sub(-1, (1ULL<<31), 32, &over);
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assert(s == (1ULL<<31)-1);
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assert(!over);
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s = int_sub((1ULL<<31), 1, 32, &over); assert(over);
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s = int_add(0, 0, 32, &over);
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assert(s == 0);
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assert(!over);
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s = int_sub(0, 0, 32, &over);
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assert(s == 0);
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assert(!over);
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s = int_add(0, -1, 32, &over);
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assert(s == -1);
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assert(!over);
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s = int_sub(0, 1, 32, &over);
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assert(s == -1);
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assert(!over);
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s = int_add(0, (1ULL<<31), 32, &over);
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assert((s & ((1ULL<<32)-1)) == (1ULL<<31));
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assert(!over);
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s = int_sub(0, (1ULL<<31)-1, 32, &over);
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assert((s & ((1ULL<<32)-1)) == (1ULL<<31)+1);
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assert(!over);
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s = int_add(-1, 0, 32, &over);
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assert(s == -1);
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assert(!over);
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s = int_add(-1, 1, 32, &over);
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assert(s == 0);
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assert(!over);
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s = int_sub(-1, -1, 32, &over);
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assert(s == 0);
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assert(!over);
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s = int_sub(-1, (1ULL<<31)-1, 32, &over);
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assert((s & ((1ULL<<32)-1)) == (1ULL<<31));
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assert(!over);
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}
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static void test_int64() {
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printf("%s\n", __FUNCTION__);
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test_int_range(64);
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int64_t s;
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bool over;
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s = int_add(1, (1ULL<<63)-1, 64, &over); assert(over);
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s = int_add((1ULL<<63)-1, 1, 64, &over); assert(over);
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s = int_sub(-1, (1ULL<<63), 64, &over);
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assert(s == (1ULL<<63)-1);
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assert(!over);
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s = int_sub((1ULL<<63), 1, 64, &over); assert(over);
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s = int_add(0, 0, 64, &over);
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assert(s == 0);
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assert(!over);
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s = int_sub(0, 0, 64, &over);
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assert(s == 0);
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assert(!over);
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s = int_add(0, -1, 64, &over);
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assert(s == -1);
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assert(!over);
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s = int_sub(0, 1, 64, &over);
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assert(s == -1);
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assert(!over);
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s = int_add(0, (1ULL<<63), 64, &over);
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assert(s == (int64_t)(1ULL<<63));
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assert(!over);
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s = int_sub(0, (1ULL<<63)-1, 64, &over);
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assert(s == (int64_t)((1ULL<<63)+1));
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assert(!over);
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s = int_add(-1, 0, 64, &over);
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assert(s == -1);
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assert(!over);
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s = int_add(-1, 1, 64, &over);
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assert(s == 0);
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assert(!over);
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s = int_sub(-1, -1, 64, &over);
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assert(s == 0);
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assert(!over);
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s = int_sub(-1, (1ULL<<63)-1, 64, &over);
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assert(s == (int64_t)(1ULL<<63));
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assert(!over);
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}
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static void test_int_sign(uint length_bits) {
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printf("%s %u\n", __FUNCTION__, length_bits);
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int64_t n;
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n = int_high_endpoint(length_bits);
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assert(int_sign_extend(n, length_bits) == n);
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n = (1ULL<<(length_bits-1));
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assert(int_sign_extend(n, length_bits) == -n);
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}
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static void test_int_sign() {
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test_int_sign(8);
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test_int_sign(16);
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test_int_sign(24);
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test_int_sign(32);
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test_int_sign(64);
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}
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int main() {
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test_int_sign();
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test_int8();
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test_int16();
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test_int24();
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test_int32();
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test_int64();
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return 0;
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}
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