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Add test of signed bitfields for #1095

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Jesse Rosenstock 2020-07-18 23:12:07 +02:00 committed by Oliver Schmidt
parent 768e03a474
commit bbcb39978c
1 changed files with 101 additions and 0 deletions
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test/todo/bug1095.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 of signed bit-fields; see https://github.com/cc65/cc65/issues/1095
*/
#include <stdio.h>
static unsigned char failures = 0;
static struct signed_ints {
signed int a : 3;
signed int b : 3;
signed int c : 3;
} si = {-4, -1, 3};
static void test_signed_bitfield(void)
{
if (si.a >= 0) {
printf("Got si.a = %d, expected negative.\n", si.a);
failures++;
}
if (si.a != -4) {
printf("Got si.a = %d, expected -4.\n", si.a);
failures++;
}
if (si.b >= 0) {
printf("Got si.b = %d, expected negative.\n", si.b);
failures++;
}
if (si.b != -1) {
printf("Got si.b = %d, expected -1.\n", si.b);
failures++;
}
if (si.b <= 0) {
printf("Got si.c = %d, expected positive.\n", si.c);
failures++;
}
if (si.c != 3) {
printf("Got si.c = %d, expected 3.\n", si.c);
failures++;
}
si.a = -3;
si.b = 1;
si.c = -2;
if (si.a >= 0) {
printf("Got si.a = %d, expected negative.\n", si.a);
failures++;
}
if (si.a != -3) {
printf("Got si.a = %d, expected -3.\n", si.a);
failures++;
}
if (si.b <= 0) {
printf("Got si.b = %d, expected positive.\n", si.b);
failures++;
}
if (si.b != 1) {
printf("Got si.b = %d, expected 1.\n", si.b);
failures++;
}
if (si.b >= 0) {
printf("Got si.c = %d, expected negative.\n", si.c);
failures++;
}
if (si.c != -2) {
printf("Got si.c = %d, expected -2.\n", si.c);
failures++;
}
}
int main(void)
{
test_signed_bitfield();
printf("failures: %u\n", failures);
return failures;
}