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#include <stdio.h>
#include "../endian.h"
static inline int bit(void * p, unsigned bitno)
{
unsigned byteno = bitno / 8;
#ifdef ARCH_BIG_ENDIAN
unsigned bit_in_byte = 7 - (bitno & 7);
#else
unsigned bit_in_byte = bitno & 7;
#endif
return (((unsigned char *) p)[byteno] >> bit_in_byte) & 1;
}
void print_prologue(char * name, size_t al, size_t sz)
{
printf("%s: align %d, sizeof %d, layout", name, (int)al, (int)sz);
}
#if 0
void print_contents(size_t sz, void * p)
{
int last, lastpos;
printf(" - ");
last = 0; lastpos = 0;
for (int i = 0; i < sz; i++) {
for (int b = 0; b < 8; b++) {
int curr = bit((char *) p + i, b);
int currpos = i * 8 + b;
if (curr != last) {
if (currpos > lastpos) {
printf("%d(%d)", last, currpos - lastpos);
}
last = curr; lastpos = currpos;
}
}
}
{ int currpos = sz * 8;
if (currpos > lastpos) {
printf("%d(%d)", last, currpos - lastpos);
}
}
}
#else
void print_contents(size_t sz, void * p)
{
printf(" - ");
for (int i = 0; i < sz; i++) {
printf("%02x", ((unsigned char *)p)[i]);
}
}
#endif
void print_epilogue (void)
{
printf("\n");
}
#define TEST4(s) \
static struct s x1 = {-1, 0, 0, 0}; \
static struct s x2 = {-1, -1, 0, 0}; \
static struct s x3 = {-1, 0, -1, 0}; \
static struct s x4 = {-1, -1, -1, -1}; \
print_prologue(#s, _Alignof(struct s), sizeof(x1)); \
print_contents(sizeof(x1), &x1); \
print_contents(sizeof(x2), &x2); \
print_contents(sizeof(x3), &x3); \
print_contents(sizeof(x4), &x4); \
print_epilogue();
int main()
{
#include "layout.h"
return 0;
}
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