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py/objstr: Don't treat bytes as unicode in str.count. 

`b'\xaa \xaa'.count(b'\xaa')` now (correctly) returns 2 instead of 1.

Fixes issue #9404.

This work was funded through GitHub Sponsors.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
This commit is contained in:
Jim Mussared 2022-09-25 22:15:45 +10:00 committed by Damien George
parent dd9dcb594c
commit 9d6f474ea4
2 changed files with 10 additions and 1 deletions
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4
py/objstr.c
View File

@ -1768,6 +1768,8 @@ STATIC mp_obj_t str_count(size_t n_args, const mp_obj_t *args) {
return MP_OBJ_NEW_SMALL_INT(utf8_charlen(start, end - start) + 1);
}
bool is_str = self_type == &mp_type_str;
// count the occurrences
mp_int_t num_occurrences = 0;
for (const byte *haystack_ptr = start; haystack_ptr + needle_len <= end;) {
@ -1775,7 +1777,7 @@ STATIC mp_obj_t str_count(size_t n_args, const mp_obj_t *args) {
num_occurrences++;
haystack_ptr += needle_len;
} else {
haystack_ptr = utf8_next_char(haystack_ptr);
haystack_ptr = is_str ? utf8_next_char(haystack_ptr) : haystack_ptr + 1;
}
}

7
tests/basics/bytes_count.py
View File

@ -48,6 +48,13 @@ print(b"aaaa".count(b'a', 1, 5))
print(b"aaaa".count(b'a', -1, 5))
print(b"abbabba".count(b"abba"))
print(b'\xaa \xaa'.count(b'\xaa'))
print(b'\xaa \xaa \xaa \xaa'.count(b'\xaa'))
print(b'\xaa \xaa \xaa \xaa'.count(b'\xaa'), 1)
print(b'\xaa \xaa \xaa \xaa'.count(b'\xaa'), 2)
print(b'\xaa \xaa \xaa \xaa'.count(b'\xaa'), 1, 3)
print(b'\xaa \xaa \xaa \xaa'.count(b'\xaa'), 2, 3)
def t():
return True