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Fix issues in str.count implementation. 

See pull request #343.
This commit is contained in:
xbe 2014-03-13 00:29:15 -07:00
parent 9e1e8cd642
commit c5d70ba48b
3 changed files with 17 additions and 21 deletions
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20
py/obj.c
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@ -224,24 +224,24 @@ uint mp_get_index(const mp_obj_type_t *type, machine_uint_t len, mp_obj_t index,
if (MP_OBJ_IS_SMALL_INT(index)) {
i = MP_OBJ_SMALL_INT_VALUE(index);
} else if (MP_OBJ_IS_TYPE(index, &bool_type)) {
i = index == mp_const_true ? 1 : 0;
i = (index == mp_const_true ? 1 : 0);
} else {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "%s indices must be integers, not %s", qstr_str(type->name), mp_obj_get_type_str(index)));
}
if (i < 0) {
i += len;
i += len;
}
if (is_slice) {
if (i < 0) {
i = 0;
} else if (i > len) {
i = len;
}
if (i < 0) {
i = 0;
} else if (i > len) {
i = len;
}
} else {
if (i < 0 || i >= len) {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "%s index out of range", qstr_str(type->name)));
}
if (i < 0 || i >= len) {
nlr_jump(mp_obj_new_exception_msg_varg(&mp_type_IndexError, "%s index out of range", qstr_str(type->name)));
}
}
return i;
}

17
py/objstr.c
View File

@ -509,19 +509,14 @@ STATIC mp_obj_t str_count(uint n_args, const mp_obj_t *args) {
// needle won't exist in haystack if it's longer, so nothing to count
if (needle_len > haystack_len) {
MP_OBJ_NEW_SMALL_INT(0);
MP_OBJ_NEW_SMALL_INT(0);
}
for (machine_uint_t haystack_index = start; haystack_index <= end; haystack_index++) {
for (machine_uint_t needle_index = 0; needle_index < needle_len; needle_index++) {
if ((haystack_index + needle_len) > end) {
return MP_OBJ_NEW_SMALL_INT(num_occurrences);
}
if (haystack[haystack_index + needle_index] == needle[needle_index] && needle_index == (needle_len - 1)) {
num_occurrences++;
}
}
for (machine_uint_t haystack_index = start; haystack_index + needle_len <= end; haystack_index++) {
if (memcmp(&haystack[haystack_index], needle, needle_len) == 0) {
num_occurrences++;
haystack_index += needle_len - 1;
}
}
return MP_OBJ_NEW_SMALL_INT(num_occurrences);

1
tests/basics/string_count.py
View File

@ -14,6 +14,7 @@ print("aaaa".count('a', 0, 4))
print("aaaa".count('a', 0, 5))
print("aaaa".count('a', 1, 5))
print("aaaa".count('a', -1, 5))
print("abbabba".count("abba"))
def t():
return True