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tEndianTests.cc
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/*
Endian Template by Terence J. Grant (tjgrant@tatewake.com)
Work with big endian and little endian types in C++ without ever calling a
conversion function.
The MIT License (MIT)
Copyright (c) 2012-03-09 Terence J. Grant (tjgrant@tatewake.com)
Permission is hereby granted, free of charge, to any person obtaining a copy of
this software and associated documentation files (the "Software"), to deal in
the Software without restriction, including without limitation the rights to
use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions: The above copyright notice and this
permission notice shall be included in all copies or substantial portions of
the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
*/
#include "tEndian.h"
#include <stdio.h>
class tEndianTests
{
public:
tEndianTests()
{
testSizeOf();
testPlatMemIsMem();
testOtherMemIsSwapped();
testArithmeticAssignment();
testLittleCompoundArithmeticAssignment();
testBigCompoundArithmeticAssignment();
testBigIsBig();
testLittleIsLittle();
}
void testSizeOf()
{
assert(sizeof(leuint64) == 8);
assert(sizeof(leuint32) == 4);
assert(sizeof(leuint16) == 2);
assert(sizeof(leint64) == 8);
assert(sizeof(leint32) == 4);
assert(sizeof(leint16) == 2);
assert(sizeof(lefloat64) == 8);
assert(sizeof(lefloat32) == 4);
assert(sizeof(beuint64) == 8);
assert(sizeof(beuint32) == 4);
assert(sizeof(beuint16) == 2);
assert(sizeof(beint64) == 8);
assert(sizeof(beint32) == 4);
assert(sizeof(beint16) == 2);
assert(sizeof(befloat64) == 8);
assert(sizeof(befloat32) == 4);
printf("*** ::testSizeOf passed\n");
}
void testPlatMemIsMem()
{
const uint16_t i = 1;
if (reinterpret_cast<const char&>(i) == 1)
{
leuint32 val = 0x12345678;
assert(((uint32_t*)&val)[0] == 0x12345678);
}
else
{
beuint32 val = 0x12345678;
assert(((uint32_t*)&val)[0] == 0x12345678);
}
printf("*** ::testPlatMemIsMem passed\n");
}
void testOtherMemIsSwapped()
{
const uint16_t i = 1;
if (reinterpret_cast<const char&>(i) == 1)
{
beuint32 val = 0x12345678;
assert(((uint32_t*)&val)[0] == 0x78563412);
}
else
{
leuint32 val = 0x12345678;
assert(((uint32_t*)&val)[0] == 0x78563412);
}
printf("*** ::testOtherMemIsSwapped passed\n");
}
void testArithmeticAssignment()
{
leint32 a;
beint32 b;
// Prefix ++
a = 0; b = 0;
assert(a == 0); assert(b == 0);
assert(++a == 1); assert(++b == 1);
assert(a == 1); assert(b == 1);
// Prefix --
a = 0; b = 0;
assert(a == 0); assert(b == 0);
assert(--a == -1); assert(--b == -1);
assert(a == -1); assert(b == -1);
// Postfix ++
a = 0; b = 0;
assert(a++ == 0); assert(b++ == 0);
assert(a == 1); assert(b == 1);
// Postfix --
a = 0; b = 0;
assert(a-- == 0); assert(b-- == 0);
assert(a == -1); assert(b == -1);
printf("*** ::testArithmeticAssignment passed\n");
}
void testLittleCompoundArithmeticAssignment()
{
leint16 a;
a = 2; a += 5; assert(a == 7);
a = 2; a -= 5; assert(a == -3);
a = 2; a *= 5; assert(a == 10);
a = 15; a /= 5; assert(a == 3);
a = 13; a %= 7; assert(a == 6);
a = 63; a &= 7; assert(a == 7);
a = 63; a |= 64; assert(a == 127);
a = 63; a ^= 7; assert(a == 56);
a = 63; a <<= 1; assert(a == 126);
a = 126; a >>= 1; assert(a == 63);
printf("*** ::testLittleCompoundArithmeticAssignment passed\n");
}
void testBigCompoundArithmeticAssignment()
{
beint16 a;
a = 2; a += 5; assert(a == 7);
a = 2; a -= 5; assert(a == -3);
a = 2; a *= 5; assert(a == 10);
a = 15; a /= 5; assert(a == 3);
a = 13; a %= 7; assert(a == 6);
a = 63; a &= 7; assert(a == 7);
a = 63; a |= 64; assert(a == 127);
a = 63; a ^= 7; assert(a == 56);
a = 63; a <<= 1; assert(a == 126);
a = 126; a >>= 1; assert(a == 63);
printf("*** ::testBigCompoundArithmeticAssignment passed\n");
}
void testBigIsBig()
{
{
beuint64 big = 0x1122334455667788;
beuint64 invbig = 0x8877665544332211;
leuint64 lit = 0x1122334455667788;
beuint64 other = 0x1122334455667788;
assert( ((uint64_t*)&big)[0] != ((uint64_t*)&invbig)[0]);
assert( ((uint64_t*)&big)[0] == ((uint64_t*)&other)[0] );
assert( ((uint64_t*)&big)[0] != ((uint64_t*)&lit)[0] );
assert( ((uint64_t*)&invbig)[0] != ((uint64_t*)&other)[0] );
assert( ((uint64_t*)&invbig)[0] == ((uint64_t*)&lit)[0] );
}
{
beint32 big = 0x12345678;
beint32 invbig = 0x78563412;
leint32 lit = 0x12345678;
beint32 other = 0x12345678;
assert( ((uint32_t*)&big)[0] != ((uint32_t*)&invbig)[0]);
assert( ((uint32_t*)&big)[0] == ((uint32_t*)&other)[0] );
assert( ((uint32_t*)&big)[0] != ((uint32_t*)&lit)[0] );
assert( ((uint32_t*)&invbig)[0] != ((uint32_t*)&other)[0] );
assert( ((uint32_t*)&invbig)[0] == ((uint32_t*)&lit)[0] );
}
{
beint16 big = 0x0102;
beint16 invbig = 0x0201;
leint16 lit = 0x0102;
beint16 other = 0x0102;
assert( ((uint16_t*)&big)[0] != ((uint16_t*)&invbig)[0]);
assert( ((uint16_t*)&big)[0] == ((uint16_t*)&other)[0] );
assert( ((uint16_t*)&big)[0] != ((uint16_t*)&lit)[0] );
assert( ((uint16_t*)&invbig)[0] != ((uint16_t*)&other)[0] );
assert( ((uint16_t*)&invbig)[0] == ((uint16_t*)&lit)[0] );
}
printf("*** ::testBigIsBig passed\n");
}
void testLittleIsLittle()
{
{
leuint64 lit = 0x1122334455667788;
leuint64 invlit = 0x8877665544332211;
leuint64 plat = 0x1122334455667788;
beuint64 big = 0x1122334455667788;
assert( ((uint32_t*)&lit)[0] != ((uint32_t*)&invlit)[0]);
assert( ((uint32_t*)&lit)[0] != ((uint32_t*)&big)[0] );
assert( ((uint32_t*)&lit)[0] == ((uint32_t*)&plat)[0] );
assert( ((uint32_t*)&invlit)[0] == ((uint32_t*)&big)[0] );
assert( ((uint32_t*)&invlit)[0] != ((uint32_t*)&plat)[0] );
}
{
leint32 lit = 0x12345678;
leint32 invlit = 0x78563412;
leint32 plat = 0x12345678;
beint32 big = 0x12345678;
assert( ((uint32_t*)&lit)[0] != ((uint32_t*)&invlit)[0]);
assert( ((uint32_t*)&lit)[0] != ((uint32_t*)&big)[0] );
assert( ((uint32_t*)&lit)[0] == ((uint32_t*)&plat)[0] );
assert( ((uint32_t*)&invlit)[0] == ((uint32_t*)&big)[0] );
assert( ((uint32_t*)&invlit)[0] != ((uint32_t*)&plat)[0] );
}
{
leint16 lit = 0x0102;
leint16 invlit = 0x0201;
leint16 plat = 0x0102;
beint16 big = 0x0102;
assert( ((uint16_t*)&lit)[0] != ((uint16_t*)&invlit)[0]);
assert( ((uint16_t*)&lit)[0] != ((uint16_t*)&big)[0] );
assert( ((uint16_t*)&lit)[0] == ((uint16_t*)&plat)[0] );
assert( ((uint16_t*)&invlit)[0] == ((uint16_t*)&big)[0] );
assert( ((uint16_t*)&invlit)[0] != ((uint16_t*)&plat)[0] );
}
printf("*** ::testLittleIsLittle passed\n");
}
};
int main (int argc, char *argv[])
{
printf("*** Running tEndianTests...\n");
tEndianTests();
printf("*** All tests passed!\n");
return 0;
}