ref: 52e4e51b50589ecb2b06559c28b7ce9f682815be
dir: /sys/src/cmd/xd.c/
#include <u.h>
#include <libc.h>
#include <bio.h>
unsigned char odata[16];
unsigned char data[16];
int ndata;
unsigned long addr;
int repeats;
int le; /* little endian */
int flush;
int abase=2;
int xd(char *, int);
void xprint(char *, ...);
void initarg(void), swizz(void);
enum{
Narg=10
};
typedef struct Arg Arg;
typedef void fmtfn(char *);
struct Arg
{
int ascii; /* 0==none, 1==ascii */
int loglen; /* 0==1, 1==2, 2==4, 3==8 */
int base; /* 0==8, 1==10, 2==16 */
fmtfn *fn; /* function to call with data */
char *afmt; /* format to use to print address */
char *fmt; /* format to use to print data */
}arg[Narg];
int narg;
fmtfn fmt0, fmt1, fmt2, fmt3, fmtc;
fmtfn *fmt[4] = {
fmt0,
fmt1,
fmt2,
fmt3
};
char *dfmt[4][3] = {
" %.3uo", " %.3ud", " %.2ux",
" %.6uo", " %.5ud", " %.4ux",
" %.11luo", " %.10lud", " %.8lux",
" %.22lluo", " %.20llud", " %.16llux",
};
char *cfmt[3][3] = {
" %c", " %c", " %c",
" %.3s", " %.3s", " %.2s",
" %.3uo", " %.3ud", " %.2ux",
};
char *afmt[2][3] = {
"%.7luo ", "%.7lud ", "%.7lux ",
"%7luo ", "%7lud ", "%7lux ",
};
Biobuf bin;
Biobuf bout;
int
flushout(Biobufhdr *bp, void *v, long n)
{
Bflush(&bout);
return read(bp->fid, v, n);
}
void
main(int argc, char *argv[])
{
int i, err;
Arg *ap;
Binit(&bout, 1, OWRITE);
Blethal(&bout, nil);
err = 0;
ap = 0;
while(argc>1 && argv[1][0]=='-' && argv[1][1]){
--argc;
argv++;
argv[0]++;
if(argv[0][0] == 'r'){
repeats = 1;
if(argv[0][1])
goto Usage;
continue;
}
if(argv[0][0] == 's'){
le = 1;
if(argv[0][1])
goto Usage;
continue;
}
if(argv[0][0] == 'u'){
flush = 1;
if(argv[0][1])
goto Usage;
continue;
}
if(argv[0][0] == 'a'){
argv[0]++;
switch(argv[0][0]){
case 'o':
abase = 0;
break;
case 'd':
abase = 1;
break;
case 'x':
abase = 2;
break;
default:
goto Usage;
}
if(argv[0][1])
goto Usage;
continue;
}
ap = &arg[narg];
initarg();
while(argv[0][0]){
switch(argv[0][0]){
case 'c':
ap->ascii = 1;
ap->loglen = 0;
if(argv[0][1] || argv[0][-1]!='-')
goto Usage;
break;
case 'o':
ap->base = 0;
break;
case 'd':
ap->base = 1;
break;
case 'x':
ap->base = 2;
break;
case 'b':
case '1':
ap->loglen = 0;
break;
case 'w':
case '2':
ap->loglen = 1;
break;
case 'l':
case '4':
ap->loglen = 2;
break;
case 'v':
case '8':
ap->loglen = 3;
break;
default:
Usage:
fprint(2, "usage: xd [-u] [-r] [-s] [-a{odx}] [-c|{b1w2l4v8}{odx}] ... file ...\n");
exits("usage");
}
argv[0]++;
}
if(ap->ascii)
ap->fn = fmtc;
else
ap->fn = fmt[ap->loglen];
ap->fmt = dfmt[ap->loglen][ap->base];
ap->afmt = afmt[ap>arg][abase];
}
if(narg == 0)
initarg();
if(argc == 1)
err = xd(0, 0);
else if(argc == 2)
err = xd(argv[1], 0);
else for(i=1; i<argc; i++)
err |= xd(argv[i], 1);
exits(err? "error" : 0);
}
void
initarg(void)
{
Arg *ap;
ap = &arg[narg++];
if(narg >= Narg){
fprint(2, "xd: too many formats (max %d)\n", Narg);
exits("usage");
}
ap->ascii = 0;
ap->loglen = 2;
ap->base = 2;
ap->fn = fmt2;
ap->fmt = dfmt[ap->loglen][ap->base];
ap->afmt = afmt[narg>1][abase];
}
int
xd(char *name, int title)
{
int fd;
int i, star;
Arg *ap;
Biobuf *bp;
fd = 0;
if(name){
bp = Bopen(name, OREAD);
if(bp == 0){
fprint(2, "xd: can't open %s\n", name);
return 1;
}
}else{
bp = &bin;
Binit(bp, fd, OREAD);
}
if(flush) Biofn(bp, flushout);
Blethal(bp, nil);
if(title)
xprint("%s\n", name);
addr = 0;
star = 0;
while((ndata=Bread(bp, data, 16)) >= 0){
if(ndata < 16)
for(i=ndata; i<16; i++)
data[i] = 0;
if(ndata==16 && repeats){
if(addr>0 && data[0]==odata[0]){
for(i=1; i<16; i++)
if(data[i] != odata[i])
break;
if(i == 16){
addr += 16;
if(star == 0){
star++;
xprint("*\n", 0);
}
continue;
}
}
for(i=0; i<16; i++)
odata[i] = data[i];
star = 0;
}
for(ap=arg; ap<&arg[narg]; ap++){
xprint(ap->afmt, addr);
(*ap->fn)(ap->fmt);
xprint("\n", 0);
}
addr += ndata;
if(ndata<16){
xprint(afmt[0][abase], addr);
xprint("\n", 0);
break;
}
}
Bterm(bp);
return 0;
}
void
fmt0(char *f)
{
int i;
for(i=0; i<ndata; i++)
xprint(f, data[i]);
}
void
fmt1(char *f)
{
int i;
for(i=0; i<ndata; i+=sizeof(unsigned short))
xprint(f, le ? (data[i+1]<<8)|data[i]
: (data[i]<<8)|data[i+1]);
}
void
fmt2(char *f)
{
int i;
for(i=0; i<ndata; i+=sizeof(unsigned long))
xprint(f, le ? (data[i+3]<<24)|(data[i+2]<<16)|(data[i+1]<<8)|data[i]
: (data[i]<<24)|(data[i+1]<<16)|(data[i+2]<<8)|data[i+3]);
}
void
fmt3(char *f)
{
int i;
unsigned long long v;
for(i=0; i<ndata; i+=sizeof(unsigned long long)){
if(le){
v = (data[i+3+4]<<24)|(data[i+2+4]<<16)|(data[i+1+4]<<8)|data[i+4];
v <<= 32;
v |= (data[i+3]<<24)|(data[i+2]<<16)|(data[i+1]<<8)|data[i];
}else{
v = (data[i]<<24)|(data[i+1]<<16)|(data[i+2]<<8)|data[i+3];
v <<= 32;
v |= (data[i+4]<<24)|(data[i+1+4]<<16)|(data[i+2+4]<<8)|data[i+3+4];
}
if(Bprint(&bout, f, v)<0){
fprint(2, "xd: i/o error\n");
exits("i/o error");
}
}
}
void
fmtc(char *f)
{
int i;
USED(f);
for(i=0; i<ndata; i++)
switch(data[i]){
case '\t':
xprint(cfmt[1][2], "\\t");
break;
case '\r':
xprint(cfmt[1][2], "\\r");
break;
case '\n':
xprint(cfmt[1][2], "\\n");
break;
case '\b':
xprint(cfmt[1][2], "\\b");
break;
default:
if(data[i]>=0x7F || ' '>data[i])
xprint(cfmt[2][2], data[i]);
else
xprint(cfmt[0][2], data[i]);
break;
}
}
void
xprint(char *fmt, ...)
{
va_list arglist;
va_start(arglist, fmt);
if(Bvprint(&bout, fmt, arglist)<0){
fprint(2, "xd: i/o error\n");
exits("i/o error");
}
va_end(arglist);
}