#include <stdio.h>
#include <time.h>

/*
 * shift/macro: 2.670000 sec
 * bitfield:    2.570000 sec
 * for:         2.690000 sec
 * table:       2.400000 sec
 */


#define invert_byte(a) ( \
	((unsigned char)(a&0x80) >> 7) |\
	((unsigned char)(a&0x40) >> 5) |\
	((unsigned char)(a&0x20) >> 3) |\
	((unsigned char)(a&0x10) >> 1) |\
	((unsigned char)(a&0x08) << 1) |\
	((unsigned char)(a&0x04) << 3) |\
	((unsigned char)(a&0x02) << 5) |\
	((unsigned char)(a&0x01) << 7) \
	)
	

#define invert_ucb(a) ( \
	i.u.b0 = (a).b7, \
	i.u.b1 = (a).b6, \
	i.u.b2 = (a).b5, \
	i.u.b3 = (a).b4, \
	i.u.b4 = (a).b3, \
	i.u.b5 = (a).b2, \
	i.u.b6 = (a).b1, \
	i.u.b7 = (a).b0, \
	i.c )
	
typedef struct ucb {
	unsigned char	b0:1,
					b1:1,
					b2:1,
					b3:1,
					b4:1,
					b5:1,
					b6:1,
					b7:1;
				} ucb;


static unsigned char ucv[]={
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff
};

char *out_c(unsigned char c);
static char s[9];

#ifdef TIMING
#define COUNT 1000
#else
#define COUNT 1
#endif
#define output(a,b,c,d) printf(a,b,c,d)

main()
{
	clock_t t,n;
	unsigned int m;
	unsigned char c=0;
	union {
		ucb u;
		unsigned char c;
	} u,i;

	t=clock();

	for(m=0; m!=COUNT; m++)
	{
	c=0;
	do
	{
		output ( "%0.3d\t%s\t%0.3d\n", c,
			out_c(invert_byte(c)), invert_byte(c));
/*		fprintf(stderr,"0x%0.2x,%c", invert_byte(c), c%8==7?'\n':' ');*/
		c++;
	}
	while ( c>0 );
	}

	n=clock();
	fprintf(stderr,"shift/macro: %f sec\n", (float)(n-t)/CLOCKS_PER_SEC);
	t=n;

	for(m=0; m!=COUNT; m++)
	{
	u.c=0;
	do
	{
		output ( "%0.3d\t%s\t%0.3d\n", u.c,
			out_c(invert_ucb(u.u)), invert_ucb(u.u));
		u.c++;
	}
	while (u.c>0);
	}

	n=clock();
	fprintf(stderr,"bitfield:    %f sec\n", (float)(n-t)/CLOCKS_PER_SEC);
	t=n;

	{
	unsigned char cc=0,d=0,i;

	for(m=0; m!=COUNT; m++)
	{
	c=0;
	do
	{
		for(i=0,d=0,cc=c;i<8*sizeof(unsigned char)-1;i++)
		{
			d |= cc&0x01;
			cc = cc >> 1;
			d = d << 1;
		}
		d |= cc&0x01;

		output ( "%0.3d\t%s\t%0.3d\n", c,
			out_c(d), d);
		c++;
	}
	while ( c>0 );
	}
	}

	n=clock();
	fprintf(stderr,"for:         %f sec\n", (float)(n-t)/CLOCKS_PER_SEC);
	t=n;


	for(m=0; m!=COUNT; m++)
	{
	c=0;
	do
	{
		output ( "%0.3d\t%s\t%0.3d\n", c,
			out_c(ucv[c]), ucv[c]);
		c++;
	}
	while ( c>0 );
	}

	n=clock();
	fprintf(stderr,"table:       %f sec\n", (float)(n-t)/CLOCKS_PER_SEC);
	t=n;


	return(0);
} 

char *out_c(unsigned char c)
{
	char *p=s+7;
	do {*p--="01"[c&0x01]; c>>=1;}
	while ( p>=s );
	return(s);
}