MVMnum64 MVM_coerce_s_n(MVMThreadContext *tc, MVMString *s) {
char *enc = MVM_string_ascii_encode(tc, s, NULL);
MVMnum64 n;
if (strcmp(enc, "NaN") == 0)
n = MVM_num_nan(tc);
else if (strcmp(enc, "Inf") == 0)
n = MVM_num_posinf(tc);
else if (strcmp(enc, "+Inf") == 0)
n = MVM_num_posinf(tc);
else if (strcmp(enc, "-Inf") == 0)
n = MVM_num_neginf(tc);
else
n = atof(enc);
MVM_free(enc);
return n;
}
static double parse_simple_number(MVMThreadContext *tc, MVMCodepointIter *ci, MVMCodepoint *cp, MVMString *s) {
double sign;
/* Handle NaN here, to make later parsing simpler */
if (match_word(tc, ci, cp, "NaN", s)) {
return MVM_num_nan(tc);
}
sign = parse_sign(tc, ci, cp);
if (match_word(tc, ci, cp, "Inf", s)) {
return sign * MVM_num_posinf(tc);
}
else if (*cp == ':') {
int radix;
double body;
get_cp(tc, ci, cp);
radix = (int) parse_int_frac_exp(tc, ci, cp, s, 10, 0);
if (*cp == '<') {
get_cp(tc, ci, cp);
body = parse_int_frac_exp(tc, ci, cp, s, radix, 0);
if (*cp == '>') { /* > */
get_cp(tc, ci, cp);
return sign * body;
}
parse_error(tc, s, "malformed ':radix<>' style radix number, expecting '>' after the body");
}
else if (*cp == 171) { /* « */
get_cp(tc, ci, cp);
body = parse_int_frac_exp(tc, ci, cp, s, radix, 0);
if (*cp == 187) { /* » */
get_cp(tc, ci, cp);
return sign * body;
}
parse_error(tc, s, "malformed ':radix«»' style radix number, expecting '>' after the body");
}
else if (*cp == '[') {
double result = 0;
get_cp(tc, ci, cp);
while (*cp != ']' && MVM_string_ci_has_more(tc, ci)) {
double digit = parse_decimal_integer(tc, ci, cp, s);
result = result * radix + digit;
if (*cp == ',') {
get_cp(tc, ci, cp);
}
}
if (*cp == ']') {
get_cp(tc, ci, cp);
return sign * result;
}
parse_error(tc, s, "malformed ':radix[]' style radix number, expecting ']' after the body");
}
parse_error(tc, s, "malformed ':radix' style number. Expected <, [ or « after ':radix'");
}
else if (*cp == '0') {
int radix = 0;
get_cp(tc, ci, cp);
switch (*cp) {
case 'b': radix = 2; break;
case 'o': radix = 8; break;
case 'd': radix = 10; break;
case 'x': radix = 16; break;
}
if (radix) {
get_cp(tc, ci, cp);
if (*cp == '_') get_cp(tc, ci, cp);
return sign * parse_int_frac_exp(tc, ci, cp, s, radix, 1);
}
return sign * parse_int_frac_exp(tc, ci, cp, s, 10, 1);
}
else {
return sign * parse_int_frac_exp(tc, ci, cp, s, 10, 0);
}
}