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range.c (range_num_to_a): reduce integer to float conversion

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For big numbers (especially integers close to MRB_INT_MAX), float
conversion may be lose precisions. So we try not to convert numbers, but
just compare.
This commit is contained in:
Yukihiro "Matz" Matsumoto
2025-03-10 13:13:10 +09:00
parent 76d3739a89
commit f4de205960
1 changed files with 7 additions and 9 deletions
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src/range.c
+7 -9
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@@ -382,27 +382,25 @@ range_num_to_a(mrb_state *mrb, mrb_value range)
}
#ifndef MRB_NO_FLOAT
if (mrb_float_p(end)) {
mrb_float a = (mrb_float)mrb_integer(beg);
mrb_int a = mrb_integer(beg);
mrb_float b = mrb_float(end);
if (a > b) {
return mrb_ary_new_capa(mrb, 0);
}
ary = mrb_ary_new_capa(mrb, (mrb_int)(b - a) + 1);
mrb_int alen = (mrb_int)(b - a) + 1;
ary = mrb_ary_new_capa(mrb, alen);
mrb_value *ptr = RARRAY_PTR(ary);
mrb_int i = 0;
if (RANGE_EXCL(r)) {
while (a < b) {
ptr[i++] = mrb_int_value(mrb, (mrb_int)a);
for (mrb_int i=0; a<b; a++) {
ptr[i++] = mrb_int_value(mrb, a);
ARY_SET_LEN(RARRAY(ary), i);
a += 1.0;
}
}
else {
while (a <= b) {
ptr[i++] = mrb_int_value(mrb, (mrb_int)a);
for (mrb_int i=0; a<=b; a++) {
ptr[i++] = mrb_int_value(mrb, a);
ARY_SET_LEN(RARRAY(ary), i);
a += 1.0;
}
}
return ary;