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Add test that plain int bitfields are unsigned

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We want to make sure this doesn't change when #1095 is fixed;
unsigned is much more efficient.
This commit is contained in:
Jesse Rosenstock 2020-07-29 13:32:26 +02:00 committed by Oliver Schmidt
parent 8eab28012a
commit 74dda01919
1 changed files with 63 additions and 0 deletions
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test/val/plain-int-bitfield.c Normal file
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/*
Copyright 2020 Google LLC
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
/*
Tests that plain int bit-fields are unsigned.
*/
#include <stdio.h>
static unsigned char failures = 0;
static struct plain_ints {
int x : 4;
int y : 10;
} pi = {15, 700};
static void test_plain_int_bitfields (void)
{
if (pi.x != 15) {
printf ("Got pi.x = %u, expected 15.\n", pi.x);
failures++;
}
if (pi.y != 700) {
printf ("Got pi.y = %u, expected 700.\n", pi.y);
failures++;
}
pi.x = 3;
pi.y = 1023;
if (pi.x != 3) {
printf ("Got pi.x = %u, expected 3.\n", pi.x);
failures++;
}
if (pi.y != 1023) {
printf ("Got pi.y = %u, expected 1023.\n", pi.y);
failures++;
}
}
int main (void)
{
test_plain_int_bitfields ();
printf ("failures: %u\n", failures);
return failures;
}