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py: Implement str.[r]index() and add tests for them.

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This commit is contained in:
xbe 2014-04-08 11:42:19 -07:00
parent 729be9b3c7
commit 3d9a39e211
4 changed files with 177 additions and 4 deletions
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24
py/objstr.c
View File

@ -441,7 +441,7 @@ STATIC mp_obj_t str_split(uint n_args, const mp_obj_t *args) {
return res;
}
STATIC mp_obj_t str_finder(uint n_args, const mp_obj_t *args, machine_int_t direction) {
STATIC mp_obj_t str_finder(uint n_args, const mp_obj_t *args, machine_int_t direction, bool is_index) {
assert(2 <= n_args && n_args <= 4);
assert(MP_OBJ_IS_STR(args[0]));
assert(MP_OBJ_IS_STR(args[1]));
@ -461,7 +461,11 @@ STATIC mp_obj_t str_finder(uint n_args, const mp_obj_t *args, machine_int_t dire
const byte *p = find_subbytes(haystack + start, end - start, needle, needle_len, direction);
if (p == NULL) {
// not found
return MP_OBJ_NEW_SMALL_INT(-1);
if (is_index) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "substring not found"));
} else {
return MP_OBJ_NEW_SMALL_INT(-1);
}
} else {
// found
return MP_OBJ_NEW_SMALL_INT(p - haystack);
@ -469,11 +473,19 @@ STATIC mp_obj_t str_finder(uint n_args, const mp_obj_t *args, machine_int_t dire
}
STATIC mp_obj_t str_find(uint n_args, const mp_obj_t *args) {
return str_finder(n_args, args, 1);
return str_finder(n_args, args, 1, false);
}
STATIC mp_obj_t str_rfind(uint n_args, const mp_obj_t *args) {
return str_finder(n_args, args, -1);
return str_finder(n_args, args, -1, false);
}
STATIC mp_obj_t str_index(uint n_args, const mp_obj_t *args) {
return str_finder(n_args, args, 1, true);
}
STATIC mp_obj_t str_rindex(uint n_args, const mp_obj_t *args) {
return str_finder(n_args, args, -1, true);
}
// TODO: (Much) more variety in args
@ -1307,6 +1319,8 @@ STATIC machine_int_t str_get_buffer(mp_obj_t self_in, buffer_info_t *bufinfo, in
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_find_obj, 2, 4, str_find);
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_rfind_obj, 2, 4, str_rfind);
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_index_obj, 2, 4, str_index);
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_rindex_obj, 2, 4, str_rindex);
STATIC MP_DEFINE_CONST_FUN_OBJ_2(str_join_obj, str_join);
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(str_split_obj, 1, 3, str_split);
STATIC MP_DEFINE_CONST_FUN_OBJ_2(str_startswith_obj, str_startswith);
@ -1320,6 +1334,8 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_2(str_rpartition_obj, str_rpartition);
STATIC const mp_map_elem_t str_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_find), (mp_obj_t)&str_find_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_rfind), (mp_obj_t)&str_rfind_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_index), (mp_obj_t)&str_index_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_rindex), (mp_obj_t)&str_rindex_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_join), (mp_obj_t)&str_join_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_split), (mp_obj_t)&str_split_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_startswith), (mp_obj_t)&str_startswith_obj },

1
py/qstrdefs.h
View File

@ -181,6 +181,7 @@ Q(union)
Q(update)
Q(find)
Q(rfind)
Q(rindex)
Q(split)
Q(startswith)
Q(replace)

78
tests/basics/string_index.py Normal file
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@ -0,0 +1,78 @@
print("hello world".index("ll"))
print("hello world".index("ll", None))
print("hello world".index("ll", 1))
print("hello world".index("ll", 1, None))
print("hello world".index("ll", None, None))
print("hello world".index("ll", 1, -1))
try:
print("hello world".index("ll", 1, 1))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("hello world".index("ll", 1, 2))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("hello world".index("ll", 1, 3))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
print("hello world".index("ll", 1, 4))
print("hello world".index("ll", 1, 5))
print("hello world".index("ll", -100))
print("0000".index('0'))
print("0000".index('0', 0))
print("0000".index('0', 1))
print("0000".index('0', 2))
print("0000".index('0', 3))
try:
print("0000".index('0', 4))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".index('0', 5))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".index('-1', 3))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".index('1', 3))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".index('1', 4))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".index('1', 5))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")

78
tests/basics/string_rindex.py Normal file
View File

@ -0,0 +1,78 @@
print("hello world".rindex("ll"))
print("hello world".rindex("ll", None))
print("hello world".rindex("ll", 1))
print("hello world".rindex("ll", 1, None))
print("hello world".rindex("ll", None, None))
print("hello world".rindex("ll", 1, -1))
try:
print("hello world".rindex("ll", 1, 1))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("hello world".rindex("ll", 1, 2))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("hello world".rindex("ll", 1, 3))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
print("hello world".rindex("ll", 1, 4))
print("hello world".rindex("ll", 1, 5))
print("hello world".rindex("ll", -100))
print("0000".rindex('0'))
print("0000".rindex('0', 0))
print("0000".rindex('0', 1))
print("0000".rindex('0', 2))
print("0000".rindex('0', 3))
try:
print("0000".rindex('0', 4))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".rindex('0', 5))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".rindex('-1', 3))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".rindex('1', 3))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".rindex('1', 4))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")
try:
print("0000".rindex('1', 5))
except ValueError:
print("Raised ValueError")
else:
print("Did not raise ValueError")