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string.c: cmp orders

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* string.c (fstring_cmp, rb_str_hash_cmp): compare lengths first,
  then encodings, and contents at last.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@51370 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2015-07-25 01:48:47 +00:00
parent 22be6d06ab
commit 502004f617
1 changed files with 14 additions and 13 deletions
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27
string.c
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@ -367,11 +367,13 @@ fstring_set_class_i(st_data_t key, st_data_t val, st_data_t arg)
static int
fstring_cmp(VALUE a, VALUE b)
{
int cmp = rb_str_hash_cmp(a, b);
if (cmp != 0) {
return cmp;
}
return ENCODING_GET(b) - ENCODING_GET(a);
long alen, blen;
const char *aptr, *bptr;
RSTRING_GETMEM(a, aptr, alen);
RSTRING_GETMEM(b, bptr, blen);
return (alen != blen ||
ENCODING_GET(a) != ENCODING_GET(b) ||
memcmp(aptr, bptr, alen) != 0);
}
static inline int
@ -2576,14 +2578,13 @@ rb_str_hash(VALUE str)
int
rb_str_hash_cmp(VALUE str1, VALUE str2)
{
long len;
if (!rb_str_comparable(str1, str2)) return 1;
if (RSTRING_LEN(str1) == (len = RSTRING_LEN(str2)) &&
memcmp(RSTRING_PTR(str1), RSTRING_PTR(str2), len) == 0) {
return 0;
}
return 1;
long len1, len2;
const char *ptr1, *ptr2;
RSTRING_GETMEM(str1, ptr1, len1);
RSTRING_GETMEM(str2, ptr2, len2);
return (len1 != len2 ||
!rb_str_comparable(str1, str2) ||
memcmp(ptr1, ptr2, len1) != 0);
}
/*