int cmd_xd(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
{
FAR char *addr;
FAR char *endptr;
int nbytes;
addr = (char*)((uintptr_t)strtol(argv[1], &endptr, 16));
if (argv[0][0] == '\0' || *endptr != '\0')
{
return ERROR;
}
nbytes = (int)strtol(argv[2], &endptr, 0);
if (argv[0][0] == '\0' || *endptr != '\0' || nbytes < 0)
{
return ERROR;
}
nsh_dumpbuffer(vtbl, "Hex dump", (uint8_t*)addr, nbytes);
return OK;
}
int cmd_hexdump(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
{
uint8_t buffer[IOBUFFERSIZE];
char msg[32];
off_t position;
int fd;
int ret = OK;
#ifdef CONFIG_NSH_CMDOPT_HEXDUMP
off_t skip = 0;
off_t count = 0xfffffff;
off_t dumpbytes;
int x;
#endif
/* Open the file for reading */
fd = open(argv[1], O_RDONLY);
if (fd < 0)
{
nsh_output(vtbl, g_fmtcmdfailed, "hexdump", "open", NSH_ERRNO);
return ERROR;
}
#ifdef CONFIG_NSH_CMDOPT_HEXDUMP
for (x = 2; x < argc; x++)
{
if (strncmp(argv[x], "skip=", 5) == 0)
{
skip = atoi(&argv[x][5]);
}
else if (strncmp(argv[x], "count=", 6) == 0)
{
count = atoi(&argv[x][6]);
}
}
#endif
position = 0;
for (;;)
{
int nbytesread = read(fd, buffer, IOBUFFERSIZE);
/* Check for read errors */
if (nbytesread < 0)
{
int errval = errno;
nsh_output(vtbl, g_fmtcmdfailed, "hexdump", "read",
NSH_ERRNO_OF(errval));
ret = ERROR;
break;
}
else if (nbytesread > 0)
{
#ifdef CONFIG_NSH_CMDOPT_HEXDUMP
if (position < skip)
{
/* Skip bytes until we reach the skip point */
position += nbytesread;
if (position > skip)
{
dumpbytes = position - skip;
if (dumpbytes > count)
{
dumpbytes = count;
}
snprintf(msg, sizeof(msg), "%s at %08x", argv[1], skip);
nsh_dumpbuffer(vtbl, msg,
&buffer[nbytesread - (position-skip)],
dumpbytes);
if (count > dumpbytes)
{
count -= dumpbytes;
}
else
{
break;
}
}
/* Don't print if we are in skip mode */
continue;
}
/* Limit dumpbuffer to count if less than a full buffer needed */
if (nbytesread > count)
{
nbytesread = count;
}
#endif
snprintf(msg, sizeof(msg), "%s at %08x", argv[1], position);
nsh_dumpbuffer(vtbl, msg, buffer, nbytesread);
position += nbytesread;
#ifdef CONFIG_NSH_CMDOPT_HEXDUMP
if (count > nbytesread)
{
count -= nbytesread;
}
else
{
break;
}
#endif
}
else
{
break; // EOF
}
}
(void)close(fd);
return ret;
}
