#include <u.h>#include <libc.h>#include <bio.h> enum {	Decode	= 0<<0,	Encode	= 1<<0,, 	Size16	= 0<<1,	Size32	= 1<<1,	Size64	= 2<<1,}; typedef int (Code)(uchar*, int, char*, int); voidxcode(Biobuf *b, Code *f){	char *s;	uchar out[8192];	int n; 	for(; s = Brdstr(b, '\n', 1); free(s)){		n = f(out, sizeof out, s, strlen(s));		if(n == -1)			sysfatal("decode error: %r");		write(1, out, n);	}} voidusage(void){	fprint(2, "usage: dec64 [-h36] ....\n");	exits("usage");} Code *codetab[] = {[Size16 | Decode]		dec16,//[Size16 | Encode]		enc16,[Size32 | Decode]		dec32,//[Size32 | Encode]		enc32,[Size64 | Decode]		dec64,//[Size64 | Encode]		enc64,}; voidmain(int argc, char **argv){	int code, size, i;	Biobuf b0, *b; 	code = Decode;	size = Size64;	ARGBEGIN{	case 'd':		code = Decode;		break;//	case 'e'://		code = Encode;//		break;	case 'h':		size = Size16;		break;	case '3':		size = Size32;		break;	case '6':		size = Size64;		break;	}ARGEND 	if(argc == 0){		if(Binit(&b0, 0, OREAD) == -1)			sysfatal("Binit: %r");		xcode(&b0, codetab[size|code]);		Bterm(&b0);	}else for(i = 0; i < argc; i++){		b = Bopen(argv[i], OREAD);		if(b == nil)			sysfatal("Bopen: %r");		xcode(b, codetab[size|code]);		Bterm(b);	}}