/* test bitfields for Microsoft C * DISABLED: win32 linux32 freebsd32 osx32 linux64 freebsd64 osx64 * RUN_OUTPUT: --- DM | MS | P32 | P64 T0 = 1 1 || 1 1 | 1 1 | 1 1 | 1 1 T1 = 2 2 || 2 2 | 2 2 | 2 2 | 2 2 T2 = 4 4 || 4 4 | 4 4 | 4 4 | 4 4 T3 = 16 8 || 16 8 | 16 8 | 8 4 | 8 8 T4 = 16 8 || 16 8 | 16 8 | 12 4 | 16 8 T5 = 16 8 || 16 8 | 16 8 | 8 4 | 8 8 S1 = 8 8 || 8 8 | 8 8 | 4 4 | 8 8 S2 = 4 4 || 4 4 | 4 4 | 4 4 | 4 4 S3 = 8 4 || 8 4 | 8 4 | 4 4 | 4 4 S4 = 8 4 || 8 4 | 8 4 | 4 4 | 4 4 S5 = 8 4 || 8 4 | 8 4 | 4 4 | 4 4 S6 = 2 2 || 2 2 | 2 2 | 2 2 | 2 2 S7 = 16 8 || 16 8 | 16 8 | 4 4 | 8 8 S8 = 4 2 || 4 2 | 4 2 | 2 2 | 2 2 S8A = 4 2 || 4 2 | 4 2 | 2 2 | 2 2 S8B = 6 2 || 6 2 | 6 2 | 2 2 | 2 2 S8C = 8 4 || 8 4 | 8 4 | 4 4 | 4 4 S9 = 4 2 || 4 2 | 4 2 | 4 2 | 4 2 S11 = 4 1 || 0 0 | 4 1 | 0 1 | 0 1 S12 = 4 4 || 4 4 | 4 4 | 4 4 | 4 4 S13 = 8 4 || 8 4 | 8 4 | 8 4 | 8 4 S14 = 8 4 || 8 4 | 8 4 | 8 4 | 8 4 S15 = 8 4 || 8 4 | 8 4 | 4 4 | 4 4 S16 = 4 4 || 0 0 | 4 4 | 4 1 | 4 1 S17 = 4 4 || 4 4 | 4 4 | 4 4 | 4 4 S18 = 2 1 || 2 1 | 2 1 | 5 1 | 9 1 A0 = 16 8 || 16 8 | 16 8 | 12 4 | 16 8 A1 = 12 4 || * * | 12 4 A2 = 12 4 || * * | 12 4 A3 = 16 4 || * * | 16 4 A4 = 12 4 || * * | 12 4 A5 = 2 1 || * * | 2 1 A6 = 4 2 || * * | 4 2 A7 = 16 4 || * * | 16 4 A8 = 12 4 || * * | 12 4 A9 = 32 8 || * * | 32 8 A10 = 4 2 || * * | 4 2 A11 = 16 4 || * * | 16 4 S9 = x30200 S14 = x300000201 S15 = x201 S18 = 1 should be 4 A0 = x1 --- */ 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; }; // struct T1 { short x:1; }; // struct T2 { int x:1; }; // struct T3 { char a,b,c,d; long long x:1; }; // struct T4 { char a,b,c,d,e,f,g,h; long long x:1; }; // struct T5 { char a,b,c,d,e,f,g; long long x:1; }; // struct S1 { long long int f:1; }; // struct S2 { int x:1; int y:1; }; // struct S3 { short c; int x:1; unsigned y:1; }; // struct S4 { int x:1; short y:1; }; // struct S5 { short x:1; int y:1; }; // struct S6 { short x:1; short y:1; }; // struct S7 { short x:1; int y:1; long long z:1; }; // struct S8 { char a; char b:1; short c:2; }; // struct S8A { char b:1; short c:2; }; // struct S8B { char a; short b:1; char c:2; }; // struct S8C { char a; int b:1; }; // struct S9 { char a; char b:2; short c:9; }; // //struct S10 { }; // struct S11 { int :0; }; // struct S12 { int :0; int x; }; // struct S13 { unsigned x:12; unsigned x1:1; unsigned x2:1; unsigned x3:1; unsigned x4:1; int w; }; // struct S14 { char a; char b:4; int c:30; }; // struct S15 { char a; char b:2; int c:9; }; // struct S16 { int :32; }; // struct S17 { int a:32; }; // struct S18 { char a; long long :0; char b; }; // struct A0 { int a; long long b:34, c:4; }; // struct A1 { int a; unsigned b:11; int c; }; // struct A2 { int a; unsigned b:11, c:5, d:16; // int e; }; struct A3 { int a; unsigned b:11, c:5, :0, d:16; // int e; }; struct A4 { int a:8; short b:7; // unsigned int c:29; }; struct A5 { char a:7, b:2; }; // struct A6 { char a:7; short b:2; }; // struct A7 { short a:8; long b:16; int c; // char d:7; }; struct A8 { short a:8; long b:16; int :0; // char c:7; }; struct A9 { unsigned short a:8; long b:16; // unsigned long c:29; long long d:9; unsigned long e:2, f:31; }; struct A10 { unsigned short a:8; char b; }; // struct A11 { char a; int b:5, c:11, :0, d:8; // struct { int ee:8; } e; }; int main() { /* MS produces identical results for 32 and 64 bit compiles, * DM is 32 bit only */ printf(" DM | MS | P32 | P64\n"); printf("T0 = %2d %d || 1 1 | 1 1 | 1 1 | 1 1\n", (int)sizeof(struct T0), (int)_Alignof(struct T0)); printf("T1 = %2d %d || 2 2 | 2 2 | 2 2 | 2 2\n", (int)sizeof(struct T1), (int)_Alignof(struct T1)); printf("T2 = %2d %d || 4 4 | 4 4 | 4 4 | 4 4\n", (int)sizeof(struct T2), (int)_Alignof(struct T2)); printf("T3 = %2d %d || 16 8 | 16 8 | 8 4 | 8 8\n", (int)sizeof(struct T3), (int)_Alignof(struct T3)); printf("T4 = %2d %d || 16 8 | 16 8 | 12 4 | 16 8\n", (int)sizeof(struct T4), (int)_Alignof(struct T4)); printf("T5 = %2d %d || 16 8 | 16 8 | 8 4 | 8 8\n", (int)sizeof(struct T5), (int)_Alignof(struct T5)); printf("S1 = %2d %d || 8 8 | 8 8 | 4 4 | 8 8\n", (int)sizeof(struct S1), (int)_Alignof(struct S1)); printf("S2 = %2d %d || 4 4 | 4 4 | 4 4 | 4 4\n", (int)sizeof(struct S2), (int)_Alignof(struct S2)); printf("S3 = %2d %d || 8 4 | 8 4 | 4 4 | 4 4\n", (int)sizeof(struct S3), (int)_Alignof(struct S3)); printf("S4 = %2d %d || 8 4 | 8 4 | 4 4 | 4 4\n", (int)sizeof(struct S4), (int)_Alignof(struct S4)); printf("S5 = %2d %d || 8 4 | 8 4 | 4 4 | 4 4\n", (int)sizeof(struct S5), (int)_Alignof(struct S5)); printf("S6 = %2d %d || 2 2 | 2 2 | 2 2 | 2 2\n", (int)sizeof(struct S6), (int)_Alignof(struct S6)); printf("S7 = %2d %d || 16 8 | 16 8 | 4 4 | 8 8\n", (int)sizeof(struct S7), (int)_Alignof(struct S7)); printf("S8 = %2d %d || 4 2 | 4 2 | 2 2 | 2 2\n", (int)sizeof(struct S8), (int)_Alignof(struct S8)); printf("S8A = %2d %d || 4 2 | 4 2 | 2 2 | 2 2\n", (int)sizeof(struct S8A), (int)_Alignof(struct S8A)); printf("S8B = %2d %d || 6 2 | 6 2 | 2 2 | 2 2\n", (int)sizeof(struct S8B), (int)_Alignof(struct S8B)); printf("S8C = %2d %d || 8 4 | 8 4 | 4 4 | 4 4\n", (int)sizeof(struct S8C), (int)_Alignof(struct S8C)); printf("S9 = %2d %d || 4 2 | 4 2 | 4 2 | 4 2\n", (int)sizeof(struct S9), (int)_Alignof(struct S9)); // printf("S10 = %2d %d || 0 0 | * * | 0 1 | 0 1\n", (int)sizeof(struct S10), (int)_Alignof(struct S10)); // MS doesn't compile printf("S11 = %2d %d || 0 0 | 4 1 | 0 1 | 0 1\n", (int)sizeof(struct S11), (int)_Alignof(struct S11)); printf("S12 = %2d %d || 4 4 | 4 4 | 4 4 | 4 4\n", (int)sizeof(struct S12), (int)_Alignof(struct S12)); printf("S13 = %2d %d || 8 4 | 8 4 | 8 4 | 8 4\n", (int)sizeof(struct S13), (int)_Alignof(struct S13)); printf("S14 = %2d %d || 8 4 | 8 4 | 8 4 | 8 4\n", (int)sizeof(struct S14), (int)_Alignof(struct S14)); printf("S15 = %2d %d || 8 4 | 8 4 | 4 4 | 4 4\n", (int)sizeof(struct S15), (int)_Alignof(struct S15)); printf("S16 = %2d %d || 0 0 | 4 4 | 4 1 | 4 1\n", (int)sizeof(struct S16), (int)_Alignof(struct S16)); printf("S17 = %2d %d || 4 4 | 4 4 | 4 4 | 4 4\n", (int)sizeof(struct S17), (int)_Alignof(struct S17)); printf("S18 = %2d %d || 2 1 | 2 1 | 5 1 | 9 1\n", (int)sizeof(struct S18), (int)_Alignof(struct S18)); printf("A0 = %2d %d || 16 8 | 16 8 | 12 4 | 16 8\n", (int)sizeof(struct A0), (int)_Alignof(struct A0)); printf("A1 = %2d %d || * * | 12 4\n", (int)sizeof(struct A1), (int)_Alignof(struct A1)); printf("A2 = %2d %d || * * | 12 4\n", (int)sizeof(struct A2), (int)_Alignof(struct A2)); printf("A3 = %2d %d || * * | 16 4\n", (int)sizeof(struct A3), (int)_Alignof(struct A3)); printf("A4 = %2d %d || * * | 12 4\n", (int)sizeof(struct A4), (int)_Alignof(struct A4)); printf("A5 = %2d %d || * * | 2 1\n", (int)sizeof(struct A5), (int)_Alignof(struct A5)); printf("A6 = %2d %d || * * | 4 2\n", (int)sizeof(struct A6), (int)_Alignof(struct A6)); printf("A7 = %2d %d || * * | 16 4\n", (int)sizeof(struct A7), (int)_Alignof(struct A7)); printf("A8 = %2d %d || * * | 12 4\n", (int)sizeof(struct A8), (int)_Alignof(struct A8)); printf("A9 = %2d %d || * * | 32 8\n", (int)sizeof(struct A9), (int)_Alignof(struct A9)); printf("A10 = %2d %d || * * | 4 2\n", (int)sizeof(struct A10), (int)_Alignof(struct A10)); printf("A11 = %2d %d || * * | 16 4\n", (int)sizeof(struct A11), (int)_Alignof(struct A11)); { struct S9 s; unsigned x; *(unsigned *)&s = 0; s.b = 2; s.c = 3; x = *(unsigned *)&s; printf("S9 = x%x\n", x); } { struct S14 s = { 1, 2, 3 }; unsigned long long v; *(long long *)&s = 0; s.a = 1; s.b = 2; s.c = 3; v = *(unsigned long long *)&s; printf("S14 = x%llx\n", v); } { struct S15 s = { 1,2,3 }; unsigned x; *(unsigned *)&s = 0; s.a = 1; s.b = 2; s.c = 3; 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 x; *(long long *)&s = 0; s.a = 1; s.b = 15; x = *(long long *)&s; printf("A0 = x%llx\n", x); } return 0; }