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numeric.c: micro optimizations

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* numeric.c (flo_to_s, rb_fix2str): use rb_usascii_str_new instead
  of rb_usascii_str_new_cstr, when the length can be calculated.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53910 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-02-24 02:20:45 +00:00
parent 7c14876b2f
commit 53ec85b5b4
1 changed files with 7 additions and 5 deletions
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12
numeric.c
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@ -733,8 +733,11 @@ flo_to_s(VALUE flt)
char *p, *e; char *p, *e;
int sign, decpt, digs; int sign, decpt, digs;
if (isinf(value)) if (isinf(value)) {
return rb_usascii_str_new2(value < 0 ? "-Infinity" : "Infinity"); static const char minf[] = "-Infinity";
const int pos = (value > 0); /* skip "-" */
return rb_usascii_str_new(minf+pos, strlen(minf)-pos);
}
else if (isnan(value)) else if (isnan(value))
return rb_usascii_str_new2("NaN"); return rb_usascii_str_new2("NaN");
@ -2863,7 +2866,7 @@ fix_uminus(VALUE num)
VALUE VALUE
rb_fix2str(VALUE x, int base) rb_fix2str(VALUE x, int base)
{ {
char buf[SIZEOF_VALUE*CHAR_BIT + 2], *b = buf + sizeof buf; char buf[SIZEOF_VALUE*CHAR_BIT + 1], *const e = buf + sizeof buf, *b = e;
long val = FIX2LONG(x); long val = FIX2LONG(x);
int neg = 0; int neg = 0;
@ -2877,7 +2880,6 @@ rb_fix2str(VALUE x, int base)
val = -val; val = -val;
neg = 1; neg = 1;
} }
*--b = '\0';
do { do {
*--b = ruby_digitmap[(int)(val % base)]; *--b = ruby_digitmap[(int)(val % base)];
} while (val /= base); } while (val /= base);
@ -2885,7 +2887,7 @@ rb_fix2str(VALUE x, int base)
*--b = '-'; *--b = '-';
} }
return rb_usascii_str_new2(b); return rb_usascii_str_new(b, e - b);
} }
/* /*