chibicc/test/bitfield.c

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#include "test.h"
struct {
char a;
int b : 5;
int c : 10;
} g45 = {1, 2, 3}, g46={};
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int main() {
ASSERT(4, sizeof(struct {int x:1; }));
ASSERT(8, sizeof(struct {long x:1; }));
struct bit1 {
short a;
char b;
int c : 2;
int d : 3;
int e : 3;
};
ASSERT(4, sizeof(struct bit1));
ASSERT(1, ({ struct bit1 x; x.a=1; x.b=2; x.c=3; x.d=4; x.e=5; x.a; }));
ASSERT(1, ({ struct bit1 x={1,2,3,4,5}; x.a; }));
ASSERT(2, ({ struct bit1 x={1,2,3,4,5}; x.b; }));
ASSERT(-1, ({ struct bit1 x={1,2,3,4,5}; x.c; }));
ASSERT(-4, ({ struct bit1 x={1,2,3,4,5}; x.d; }));
ASSERT(-3, ({ struct bit1 x={1,2,3,4,5}; x.e; }));
ASSERT(1, g45.a);
ASSERT(2, g45.b);
ASSERT(3, g45.c);
ASSERT(0, g46.a);
ASSERT(0, g46.b);
ASSERT(0, g46.c);
typedef struct {
int a : 10;
int b : 10;
int c : 10;
} T3;
ASSERT(1, ({ T3 x={1,2,3}; x.a++; }));
ASSERT(2, ({ T3 x={1,2,3}; x.b++; }));
ASSERT(3, ({ T3 x={1,2,3}; x.c++; }));
ASSERT(2, ({ T3 x={1,2,3}; ++x.a; }));
ASSERT(3, ({ T3 x={1,2,3}; ++x.b; }));
ASSERT(4, ({ T3 x={1,2,3}; ++x.c; }));
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ASSERT(4, sizeof(struct {int a:3; int c:1; int c:5;}));
ASSERT(8, sizeof(struct {int a:3; int:0; int c:5;}));
ASSERT(4, sizeof(struct {int a:3; int:0;}));
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printf("OK\n");
return 0;
}