BYTEALIGN Compiler Directive

None.

None.

Structure pointers point to word-aligned structures.

Options — C166 — Misc Controls.

The BYTEALIGN directive generates code that supports pointers to structure members that may start on byte boundaries. This directive is required when you use the PACK(1) directive.

PACK

#pragma pack(1)     /* byte alignment */
#pragma BYTEALIGN

struct s1  {
  int  i1;       // i1 has offset 0
  char c1;       // c1 has offset 2
  struct s2  {
    int  i2;     // i2 has offset 3
    char c2;     // c2 has offset 5
    int  i3;     // i3 has offset 6
  }s2;
  char z1;       // z1 has offset 8
} s1;

struct s2 *s2p;

void main (void)  {
  s2p = &s1.s2;   // pointer to byte-aligned struct
  s2p->i2 = 0;    // access to byte-aligned int
}