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bitfieldsposix32.c
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bitfieldsposix32.c
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/* test bitfields
* DISABLED: win32 win64 linux64 freebsd64 osx64
* RUN_OUTPUT:
---
T0 = 1 1 | 1 1
T1 = 2 2 | 2 2
T2 = 4 4 | 4 4
T3 = 8 4 | 8 4
T4 = 12 4 | 12 4
T5 = 8 4 | 8 4
S1 = 4 4 | 8 8
S2 = 4 4 | 4 4
S3 = 4 4 | 4 4
S4 = 4 4 | 4 4
S5 = 4 4 | 4 4
S6 = 2 2 | 2 2
S7 = 4 4 | 8 8
S8 = 2 2 | 2 2
S8A = 2 2 | 2 2
S8B = 2 2 | 2 2
S8C = 4 4 | 4 4
S9 = 4 2 | 4 2
S10 = 0 1 | 0 1
S11 = 0 1 | 0 1
S12 = 4 4 | 4 4
S13 = 8 4 | 8 4
S14 = 8 4 | 8 4
S15 = 4 4 | 4 4
S16 = 4 1 | 4 1
S17 = 4 4 | 4 4
S18 = 5 1 | 5 1
A0 = 12 4 | 12 4
A1 = 12 4 | 12 4
A2 = 12 4 | 12 4
A3 = 16 4 | 16 4
A4 = 8 4 | 8 4
A5 = 2 1 | 2 1
A6 = 2 2 | 2 2
A7 = 12 4 | 12 4
A8 = 8 4 | 8 4
A9 = 16 4 | 16 4
A10 = 2 2 | 2 2
A11 = 12 4 | 12 4
S9 = x30200
S14 = x300000201
S15 = xe01
S18 = 4 should be 4
A0 = xf00000001
---
*/
int printf(const char *fmt, ...);
void exit(int);
void assert(int n, int b)
{
if (!b)
{
printf("assert fail %d\n", n);
exit(1);
}
}
int is64bit() { return sizeof(long) == 8; } // otherwise assume 32 bit
/*************************************************************/
struct T0 { char x:1; }; // 1 1
struct T1 { short x:1; }; // 2 2
struct T2 { int x:1; }; // 4 4
struct T3 { char a,b,c,d; long long x:1; }; // 8 4 (32 bit) 8 8 (64 bit)
struct T4 { char a,b,c,d,e,f,g,h; long long x:1; }; // 12 4 (32 bit) 16 8 (64 bit)
struct T5 { char a,b,c,d,e,f,g; long long x:1; }; // 8 4 (32 bit) 8 8 (64 bit)
struct S1 { long long int f:1; }; // 4 4 (32 bit) 8 8 (64 bit)
struct S2 { int x:1; int y:1; }; // 4 4
struct S3 { short c; int x:1; unsigned y:1; }; // 4 4
struct S4 { int x:1; short y:1; }; // 4 4
struct S5 { short x:1; int y:1; }; // 4 4
struct S6 { short x:1; short y:1; }; // 2 2
struct S7 { short x:1; int y:1; long long z:1; }; // 4 4 (32 bit) 8 8 (64 bit)
struct S8 { char a; char b:1; short c:2; }; // 2 2
struct S8A { char b:1; short c:2; }; // 2 2
struct S8B { char a; short b:1; char c:2; }; // 2 2
struct S8C { char a; int b:1; }; // 4 4
struct S9 { char a; char b:2; short c:9; }; // 4 2 x30201
struct S10 { }; // 0 1
struct S11 { int :0; }; // 0 1
struct S12 { int :0; int x; }; // 4 4
struct S13 { unsigned x:12; unsigned x1:1; unsigned x2:1; unsigned x3:1; unsigned x4:1; int w; }; // 8 4
struct S14 { char a; char b:4; int c:30; }; // 8 4
struct S15 { char a; char b:2; int c:9; }; // 4 4 xe01
struct S16 { int :32; }; // 4 1
struct S17 { int a:32; }; // 4 4
struct S18 { char a; long long :0; char b; }; // 5 1 (32 bit) 9 1 (64 bit)
struct A0 { int a; long long b:34, c:4; }; // 12 4 (32 bit) 16 8 (64 bit)
struct A1 { int a; unsigned b:11; int c; }; // 12 4
struct A2 { int a; unsigned b:11, c:5, d:16; // 12 4
int e; };
struct A3 { int a; unsigned b:11, c:5, :0, d:16; // 16 4
int e; };
struct A4 { int a:8; short b:7; // 8 4
unsigned int c:29; };
struct A5 { char a:7, b:2; }; // 2 1
struct A6 { char a:7; short b:2; }; // 2 2
struct A7 { short a:8; long b:16; int c; // 12 4 (32 bit) 16 8 (64 bit)
char d:7; };
struct A8 { short a:8; long b:16; int :0; // 8 4 (32 bit) 8 8 (64 bit)
char c:7; };
struct A9 { unsigned short a:8; long b:16; // 16 4 (32 bit) 16 8 (64 bit)
unsigned long c:29; long long d:9;
unsigned long e:2, f:31; };
struct A10 { unsigned short a:8; char b; }; // 2 2
struct A11 { char a; int b:5, c:11, :0, d:8; // 16 4
struct { int ee:8; } e; };
int main()
{
printf("T0 = %d %d | 1 1\n", (int)sizeof(struct T0), (int)_Alignof(struct T0));
printf("T1 = %d %d | 2 2\n", (int)sizeof(struct T1), (int)_Alignof(struct T1));
printf("T2 = %d %d | 4 4\n", (int)sizeof(struct T2), (int)_Alignof(struct T2));
printf("T3 = %d %d | 8 4\n", (int)sizeof(struct T3), (int)_Alignof(struct T3));
printf("T4 = %d %d | 12 4\n", (int)sizeof(struct T4), (int)_Alignof(struct T4));
printf("T5 = %d %d | 8 4\n", (int)sizeof(struct T5), (int)_Alignof(struct T5));
printf("S1 = %d %d | 8 8\n", (int)sizeof(struct S1), (int)_Alignof(struct S1));
printf("S2 = %d %d | 4 4\n", (int)sizeof(struct S2), (int)_Alignof(struct S2));
printf("S3 = %d %d | 4 4\n", (int)sizeof(struct S3), (int)_Alignof(struct S3));
printf("S4 = %d %d | 4 4\n", (int)sizeof(struct S4), (int)_Alignof(struct S4));
printf("S5 = %d %d | 4 4\n", (int)sizeof(struct S5), (int)_Alignof(struct S5));
printf("S6 = %d %d | 2 2\n", (int)sizeof(struct S6), (int)_Alignof(struct S6));
printf("S7 = %d %d | 8 8\n", (int)sizeof(struct S7), (int)_Alignof(struct S7));
printf("S8 = %d %d | 2 2\n", (int)sizeof(struct S8), (int)_Alignof(struct S8));
printf("S8A = %d %d | 2 2\n", (int)sizeof(struct S8A), (int)_Alignof(struct S8A));
printf("S8B = %d %d | 2 2\n", (int)sizeof(struct S8B), (int)_Alignof(struct S8B));
printf("S8C = %d %d | 4 4\n", (int)sizeof(struct S8C), (int)_Alignof(struct S8C));
printf("S9 = %d %d | 4 2\n", (int)sizeof(struct S9), (int)_Alignof(struct S9));
printf("S10 = %d %d | 0 1\n", (int)sizeof(struct S10), (int)_Alignof(struct S10));
printf("S11 = %d %d | 0 1\n", (int)sizeof(struct S11), (int)_Alignof(struct S11));
printf("S12 = %d %d | 4 4\n", (int)sizeof(struct S12), (int)_Alignof(struct S12));
printf("S13 = %d %d | 8 4\n", (int)sizeof(struct S13), (int)_Alignof(struct S13));
printf("S14 = %d %d | 8 4\n", (int)sizeof(struct S14), (int)_Alignof(struct S14));
printf("S15 = %d %d | 4 4\n", (int)sizeof(struct S15), (int)_Alignof(struct S15));
printf("S16 = %d %d | 4 1\n", (int)sizeof(struct S16), (int)_Alignof(struct S16));
printf("S17 = %d %d | 4 4\n", (int)sizeof(struct S17), (int)_Alignof(struct S17));
printf("S18 = %d %d | 5 1\n", (int)sizeof(struct S18), (int)_Alignof(struct S18));
printf("A0 = %d %d | 12 4\n", (int)sizeof(struct A0), (int)_Alignof(struct A0));
printf("A1 = %d %d | 12 4\n", (int)sizeof(struct A1), (int)_Alignof(struct A1));
printf("A2 = %d %d | 12 4\n", (int)sizeof(struct A2), (int)_Alignof(struct A2));
printf("A3 = %d %d | 16 4\n", (int)sizeof(struct A3), (int)_Alignof(struct A3));
printf("A4 = %d %d | 8 4\n", (int)sizeof(struct A4), (int)_Alignof(struct A4));
printf("A5 = %d %d | 2 1\n", (int)sizeof(struct A5), (int)_Alignof(struct A5));
printf("A6 = %d %d | 2 2\n", (int)sizeof(struct A6), (int)_Alignof(struct A6));
printf("A7 = %d %d | 12 4\n", (int)sizeof(struct A7), (int)_Alignof(struct A7));
printf("A8 = %d %d | 8 4\n", (int)sizeof(struct A8), (int)_Alignof(struct A8));
printf("A9 = %d %d | 16 4\n", (int)sizeof(struct A9), (int)_Alignof(struct A9));
printf("A10 = %d %d | 2 2\n", (int)sizeof(struct A10), (int)_Alignof(struct A10));
printf("A11 = %d %d | 12 4\n", (int)sizeof(struct A11), (int)_Alignof(struct A11));
{
struct S9 s;
*(unsigned *)&s = 0;
s.b = 2; s.c = 3;
unsigned x = *(unsigned *)&s;
printf("S9 = x%x\n", x);
}
{
struct S14 s = { 1, 2, 3 };
*(long long *)&s = 0;
s.a = 1;
s.b = 2;
s.c = 3;
unsigned long long v = *(unsigned long long *)&s;
printf("S14 = x%llx\n", v);
}
{
struct S15 s = { 1,2,3 };
*(unsigned *)&s = 0;
s.a = 1; s.b = 2; s.c = 3;
unsigned x = *(unsigned *)&s;
printf("S15 = x%x\n", x);
}
{
struct S18 s;
printf("S18 = %d should be %d\n", (int)(&s.b - &s.a), is64bit() ? 8 : 4);
}
{
struct A0 s;
*(long long *)&s = 0;
s.a = 1; s.b = 15;
long long x = *(long long *)&s;
printf("A0 = x%llx\n", x);
}
return 0;
}