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string.c: remove unnecessary terminator space

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* string.c (str_buf_cat): remove unnecessary terminator space,
  since the capacity does not include its length but RESIZE_CAPA()
  considers it.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45536 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2014-04-09 03:50:07 +00:00
parent f2ba957058
commit 5c7564c9e2
1 changed files with 2 additions and 3 deletions
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5
string.c
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@ -2009,7 +2009,6 @@ static VALUE
str_buf_cat(VALUE str, const char *ptr, long len)
{
long capa, total, off = -1;
const int termlen = TERM_LEN(str);
if (ptr >= RSTRING_PTR(str) && ptr <= RSTRING_END(str)) {
off = ptr - RSTRING_PTR(str);
@ -2028,11 +2027,11 @@ str_buf_cat(VALUE str, const char *ptr, long len)
total = RSTRING_LEN(str)+len;
if (capa <= total) {
while (total > capa) {
if (capa + termlen >= LONG_MAX / 2) {
if (capa > LONG_MAX / 2) {
capa = (total + 4095) / 4096 * 4096;
break;
}
capa = (capa + termlen) * 2;
capa = 2 * capa;
}
RESIZE_CAPA(str, capa);
}