static int cmd_help(char *arg) {
if(*arg) {
ut64 ret = r_num_calc (NULL, arg, NULL);
printf("0x%"LLF"x %"LLF"d 0%"LLF"o\n", ret, ret, ret);
} else printf(
"s[+-addr] seek to relative or absolute address\n"
"b[+-size] change block size\n"
"w[hex|\"str\"] write hexpair or string\n"
"/[hex|\"str\"] search hexpair or string\n"
"x[size] hexdump\n"
"X[size] hexpair dump\n"
"p[fmt] print formatted current block ('p' for help)\n"
"d[size] disasemble\n"
"r[+-[num]] truncate or -remove N bytes\n"
".[file] interpret file\n"
"<[file] load file in current seek\n"
">[file] dump current block to file\n"
"!cmd run shell command\n"
"?expr calculate numeric expression\n"
"q quit\n");
return 1;
}
R_API ut64 r_num_math(RNum *num, const char *str) {
#if R_NUM_USE_CALC
ut64 ret;
const char *err = NULL;
if (!str) return 0LL;
//if (!str || !*str) return 0LL;
ret = r_num_calc (num, str, &err);
if (err) eprintf ("r_num_calc error: (%s) in (%s)\n", err, str);
else if (num) num->value = ret;
if (num != NULL)
num->value = ret;
return ret;
#else
ut64 ret = 0LL;
char op = '+';
int len;
char *p, *s, *os;
char *group;
if (!str) return 0LL;
len = strlen (str)+1;
os = malloc (len+1);
s = os;
memcpy (s, str, len);
for (; *s==' '; s++);
p = s;
do {
group = strchr (p, '(');
if (group) {
group[0] = '\0';
ret = r_num_op (op, ret, r_num_math_internal (num, p));
for (; p<group; p+=1) {
switch (*p) {
case '+':
case '-':
case '*':
case '/':
case '&':
case '|':
case '^':
op = *p;
break;
}
}
group[0] = '(';
p = group+1;
if (r_str_delta (p, '(', ')')<0) {
char *p2 = strchr (p, '(');
if (p2 != NULL) {
*p2 = '\0';
ret = r_num_op (op, ret, r_num_math_internal (num, p));
ret = r_num_op (op, ret, r_num_math (num, p2+1));
p = p2+1;
continue;
} else eprintf ("WTF!\n");
} else ret = r_num_op (op, ret, r_num_math_internal (num, p));
} else ret = r_num_op (op, ret, r_num_math_internal (num, p));
} while (0);
if (num != NULL)
num->value = ret;
free (os);
return ret;
#endif
}
