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string.c: improve insertion performace

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* string.c (rb_str_splice_0): improve performace of single byte
  optimizable cases, insertion 7bit string to 7bit string.
  [ruby-dev:49984] [Bug #13228]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58383 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2017-04-17 13:38:34 +00:00
parent 97819765a6
commit cc68af3d02
1 changed files with 8 additions and 1 deletions
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9
string.c
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@ -4397,6 +4397,7 @@ rb_str_splice_0(VALUE str, long beg, long len, VALUE val)
{
char *sptr;
long slen, vlen = RSTRING_LEN(val);
int cr;
if (beg == 0 && vlen == 0) {
rb_str_drop_bytes(str, len);
@ -4404,7 +4405,7 @@ rb_str_splice_0(VALUE str, long beg, long len, VALUE val)
return;
}
rb_str_modify(str);
str_modify_keep_cr(str);
RSTRING_GETMEM(str, sptr, slen);
if (len < vlen) {
/* expand string */
@ -4412,6 +4413,11 @@ rb_str_splice_0(VALUE str, long beg, long len, VALUE val)
sptr = RSTRING_PTR(str);
}
if (ENC_CODERANGE(str) == ENC_CODERANGE_7BIT)
cr = rb_enc_str_coderange(val);
else
cr = ENC_CODERANGE_UNKNOWN;
if (vlen != len) {
memmove(sptr + beg + vlen,
sptr + beg + len,
@ -4427,6 +4433,7 @@ rb_str_splice_0(VALUE str, long beg, long len, VALUE val)
STR_SET_LEN(str, slen);
TERM_FILL(&sptr[slen], TERM_LEN(str));
OBJ_INFECT(str, val);
ENC_CODERANGE_SET(str, cr);
}
void