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float representation simplified

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This commit is contained in:
Yukihiro Matsumoto
2012-06-13 15:51:28 +09:00
parent db3d72a471
commit 38d2b7f84c
1 changed files with 2 additions and 16 deletions
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src/numeric.c
+2 -16
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@@ -187,27 +187,13 @@ flo_to_s(mrb_state *mrb, mrb_value flt)
{
char buf[32];
mrb_float value = mrb_float(flt);
char *p, *e;
if (isinf(value))
return mrb_str_new2(mrb, value < 0 ? "-Infinity" : "Infinity");
return mrb_str_new2(mrb, value < 0 ? "-inf" : "inf");
else if(isnan(value))
return mrb_str_new2(mrb, "NaN");
sprintf(buf, "%#.15g", value); /* ensure to print decimal point */
if (!(e = strchr(buf, 'e'))) {
e = buf + strlen(buf);
}
if (!ISDIGIT(e[-1])) { /* reformat if ended with decimal point (ex 111111111111111.) */
sprintf(buf, "%#.14e", value);
if (!(e = strchr(buf, 'e'))) {
e = buf + strlen(buf);
}
}
p = e;
while (p[-1]=='0' && ISDIGIT(p[-2]))
p--;
memmove(p, e, strlen(e)+1);
sprintf(buf, "%.14g", value);
return mrb_str_new2(mrb, buf);
}