/*# proc: bytes2bits - converts a grayscale image into a binary image.# proc:*//* LINTLIBRARY */#include <stdio.h>#include <values.h>#include <sys/param.h>#include <sys/types.h>bytes2bits(p,q,pixels)u_char *p, *q;register u_int pixels;{register u_char *r, a;register u_int *l;register u_char b;if (p == (u_char *) NULL)	fatalerr("bytes2bits", "null src pointer", NULL);if (q == (u_char *) NULL)	fatalerr("bytes2bits", "null dst pointer", NULL);pixels = howmany(pixels,BITSPERBYTE);r = q;l = (u_int *) p;while (pixels--) {	switch (*l++) {/*		case 0x00000000:	a = 0x00; break; */		case 0x00000000:	a = 0x00; break;/*		case 0x00000001:	a = 0x10; break; */		case 0x01000000:	a = 0x10; break;/*		case 0x00000100:	a = 0x20; break; */		case 0x00010000:	a = 0x20; break;/*		case 0x00000101:	a = 0x30; break; */		case 0x01010000:	a = 0x30; break;/*		case 0x00010000:	a = 0x40; break; */		case 0x00000100:	a = 0x40; break;/*		case 0x00010001:	a = 0x50; break; */		case 0x01000100:	a = 0x50; break;/*		case 0x00010100:	a = 0x60; break; */		case 0x00010100:	a = 0x60; break;/*		case 0x00010101:	a = 0x70; break; */		case 0x01010100:	a = 0x70; break;/*		case 0x01000000:	a = 0x80; break; */		case 0x00000001:	a = 0x80; break;/*		case 0x01000001:	a = 0x90; break; */		case 0x01000001:	a = 0x90; break;/*		case 0x01000100:	a = 0xa0; break; */		case 0x00010001:	a = 0xa0; break;/*		case 0x01000101:	a = 0xb0; break; */		case 0x01010001:	a = 0xb0; break;/*		case 0x01010000:	a = 0xc0; break; */		case 0x00000101:	a = 0xc0; break;/*		case 0x01010001:	a = 0xd0; break; */		case 0x01000101:	a = 0xd0; break;/*		case 0x01010100:	a = 0xe0; break; */		case 0x00010101:	a = 0xe0; break;/*		case 0x01010101:	a = 0xf0; break; */		case 0x01010101:	a = 0xf0; break;		default:		  (void) fprintf(stderr,"bytes2bits: bad value %x\n",*--l);		  exit(1);	}	switch (*l++) {/*		case 0x00000000:	b = 0x00; break; */		case 0x00000000:	b = 0x00; break;/*		case 0x00000001:	b = 0x01; break; */		case 0x01000000:	b = 0x01; break;/*		case 0x00000100:	b = 0x02; break; */		case 0x00010000:	b = 0x02; break;/*		case 0x00000101:	b = 0x03; break;*/		case 0x01010000:	b = 0x03; break;/*		case 0x00010000:	b = 0x04; break; */		case 0x00000100:	b = 0x04; break;/*		case 0x00010001:	b = 0x05; break; */		case 0x01000100:	b = 0x05; break;/*		case 0x00010100:	b = 0x06; break;*/		case 0x00010100:	b = 0x06; break;/*		case 0x00010101:	b = 0x07; break; */		case 0x01010100:	b = 0x07; break;/*		case 0x01000000:	b = 0x08; break; */		case 0x00000001:	b = 0x08; break;/*		case 0x01000001:	b = 0x09; break; */		case 0x01000001:	b = 0x09; break;/*		case 0x01000100:	b = 0x0a; break; */		case 0x00010001:	b = 0x0a; break;/*		case 0x01000101:	b = 0x0b; break; */		case 0x01010001:	b = 0x0b; break;/*		case 0x01010000:	b = 0x0c; break; */		case 0x00000101:	b = 0x0c; break;/*		case 0x01010001:	b = 0x0d; break; */		case 0x01000101:	b = 0x0d; break;/*		case 0x01010100:	b = 0x0e; break; */		case 0x00010101:	b = 0x0e; break;/*		case 0x01010101:	b = 0x0f; break; */		case 0x01010101:	b = 0x0f; break;		default:		  (void) fprintf(stderr,"bytes2bits: bad value %x\n",*--l);		  exit(1);	}	*r++ = a | b;}}