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Implement ternary support for numeric input ##util (#19153)

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pancake 2021-10-01 18:40:10 +02:00 committed by GitHub
parent 0353cdcf5f
commit c8f80fce7b
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1 changed files with 39 additions and 9 deletions
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48
libr/util/unum.c
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@ -156,6 +156,41 @@ static void error(RNum *num, const char *err_str) {
}
}
static ut64 r_num_from_binary(const char *str) {
int i, j;
ut64 ret = 0;
for (j = 0, i = strlen (str) - 1; i > 0; i--, j++) {
if (str[i] == '1') {
ret |= (1 << j);
} else if (str[i] != '0') {
break;
}
}
sscanf (str, "0x%"PFMT64x, &ret);
return ret;
}
R_API ut64 r_num_from_ternary(const char *inp) {
if (!inp) {
return 0LL;
}
const char *p;
int pos = strlen (inp);
ut64 fr = 0;
for (p = inp; *p ; p++, pos--) {
int n012 = 0;
switch (*p) {
case '0':
case '1':
case '2':
n012 = *p - '0';
fr += n012 * pow (3, pos - 1);
break;
}
}
return fr;
}
// TODO: try to avoid the use of sscanf
/* old get_offset */
R_API ut64 r_num_get(RNum *num, const char *str) {
@ -218,21 +253,16 @@ R_API ut64 r_num_get(RNum *num, const char *str) {
}
}
if (str[0] == '0' && str[1] == 'b') {
ret = 0;
for (j = 0, i = strlen (str) - 1; i > 0; i--, j++) {
if (str[i] == '1') {
ret|=1 << j;
} else if (str[i] != '0') {
break;
}
}
sscanf (str, "0x%"PFMT64x, &ret);
ret = r_num_from_binary (str + 2);
} else if (str[0] == '\'') {
ret = str[1] & 0xff;
// ugly as hell
} else if (!strncmp (str, "0xff..", 6) || !strncmp (str, "0xFF..", 6)) {
ret = r_num_tailff (num, str + 6);
// ugly as hell
} else if (!strncmp (str, "0t", 2)) {
// parse ternary number
ret = r_num_from_ternary (str + 2);
} else if (!strncmp (str, "0o", 2)) {
if (sscanf (str + 2, "%"PFMT64o, &ret) != 1) {
error (num, "invalid octal number");