L4Re/departure

Annotated tests/dstest_align.cc

618:7123a7307a82
458:4c2ca0e1bc85
8 months ago Paul Boddie file changeset files shortlog Introduced some debugging output control.
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#include <stdio.h>
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#include <stdint.h>
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#include <systypes/format.h>
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#define FMTsize "%" pFMTsize "d"
 
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#define FMT32x "%" pFMT32 "x"
 
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#define FMT64x "%" pFMT64 "x"
 
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#define OFFSET(obj, mem) ((char *) &(obj)->mem - (char *) obj)
 
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struct A
 
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{
 
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  uint32_t a;
 
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  uint64_t b;
 
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  uint64_t c;
 
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} __attribute__ ((packed));
 
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struct B
 
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{
 
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  uint32_t a;
 
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  uint64_t b;
 
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  uint64_t c;
 
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};
 
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struct C
 
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{
 
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  uint32_t a;
 
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  uint32_t b;
 
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  uint64_t c;
 
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};
 
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int main(int argc, char *argv[])
 
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{
 
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  (void) argc; (void) argv;
 
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  struct A a = {1, 2, 3};
 
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  struct B b = {1, 2, 3};
 
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  struct C c = {1, 2, 3};
 
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  uint32_t m[6] = {1, 2, 3, 4, 5, 6};
 
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  struct A *ma = (struct A *) m;
 
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  struct A *ma1 = (struct A *) (m + 1);
 
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  printf("a.a @ offset " FMTsize " = " FMT32x "\n", OFFSET(&a, a), a.a);
 
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  printf("a.b @ offset " FMTsize " = " FMT64x "\n", OFFSET(&a, b), a.b);
 
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  printf("a.c @ offset " FMTsize " = " FMT64x "\n\n", OFFSET(&a, c), a.c);
 
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  printf("b.a @ offset " FMTsize " = " FMT32x "\n", OFFSET(&b, a), b.a);
 
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  printf("b.b @ offset " FMTsize " = " FMT64x "\n", OFFSET(&b, b), b.b);
 
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  printf("b.c @ offset " FMTsize " = " FMT64x "\n\n", OFFSET(&b, c), b.c);
 
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  printf("c.a @ offset " FMTsize " = " FMT32x "\n", OFFSET(&c, a), c.a);
 
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  printf("c.b @ offset " FMTsize " = " FMT32x "\n", OFFSET(&c, b), c.b);
 
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  printf("c.c @ offset " FMTsize " = " FMT64x "\n\n", OFFSET(&c, c), c.c);
 
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  printf("ma.a @ offset " FMTsize " = " FMT32x "\n", OFFSET(ma, a), ma->a);
 
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  printf("ma.b @ offset " FMTsize " = " FMT64x "\n", OFFSET(ma, b), ma->b);
 
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  printf("ma.c @ offset " FMTsize " = " FMT64x "\n\n", OFFSET(ma, c), ma->c);
 
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  printf("ma1.a @ offset " FMTsize " = " FMT32x "\n", OFFSET(ma1, a), ma1->a);
 
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  printf("ma1.b @ offset " FMTsize " = " FMT64x "\n", OFFSET(ma1, b), ma1->b);
 
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  printf("ma1.c @ offset " FMTsize " = " FMT64x "\n\n", OFFSET(ma1, c), ma1->c);
 
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  return 0;
 
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}