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add methods isspace(), isalpha(), isdigit(), isupper() and islower() to str

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This commit is contained in:
Kim Bauters 2014-05-31 07:30:03 +01:00
parent 1f07b7e3c3
commit a3f4b83018
4 changed files with 102 additions and 0 deletions
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2
py/misc.h
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@ -96,6 +96,8 @@ bool unichar_isalpha(unichar c);
bool unichar_isprint(unichar c);
bool unichar_isdigit(unichar c);
bool unichar_isxdigit(unichar c);
bool unichar_isupper(unichar c);
bool unichar_islower(unichar c);
unichar unichar_tolower(unichar c);
unichar unichar_toupper(unichar c);

75
py/objstr.c
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@ -1502,6 +1502,71 @@ STATIC mp_obj_t str_upper(mp_obj_t self_in) {
return str_caseconv(CASE_UPPER, self_in);
}
enum { IS_SPACE, IS_ALPHA, IS_DIGIT, IS_UPPER, IS_LOWER };
STATIC mp_obj_t str_uni_istype(int type, mp_obj_t self_in) {
GET_STR_DATA_LEN(self_in, self_data, self_len);
if (self_len == 0) return mp_const_false; // default to False for empty str
typedef bool (*check_function)(unichar);
check_function f;
if (type != IS_UPPER && type != IS_LOWER) {
switch (type) {
case IS_SPACE: f = &unichar_isspace; break;
case IS_ALPHA: f = &unichar_isalpha; break;
case IS_DIGIT: f = &unichar_isdigit; break;
default:
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "unknown type provided for str_uni_istype"));
}
for (int i = 0; i < self_len; i++) {
if (!f(*self_data++)) return mp_const_false;
}
} else {
switch (type) {
case IS_UPPER: f = &unichar_isupper; break;
case IS_LOWER: f = &unichar_islower; break;
default:
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "unknown type provided for str_uni_istype"));
}
bool contains_alpha = false;
for (int i = 0; i < self_len; i++) { // only check alphanumeric characters
if (unichar_isalpha(*self_data++)) {
contains_alpha = true;
if (!f(*(self_data-1))) return mp_const_false; // we already incremented
}
}
if (!(contains_alpha)) return mp_const_false;
}
return mp_const_true;
}
STATIC mp_obj_t str_isspace(mp_obj_t self_in) {
return str_uni_istype(IS_SPACE, self_in);
}
STATIC mp_obj_t str_isalpha(mp_obj_t self_in) {
return str_uni_istype(IS_ALPHA, self_in);
}
STATIC mp_obj_t str_isdigit(mp_obj_t self_in) {
return str_uni_istype(IS_DIGIT, self_in);
}
STATIC mp_obj_t str_isupper(mp_obj_t self_in) {
return str_uni_istype(IS_UPPER, self_in);
}
STATIC mp_obj_t str_islower(mp_obj_t self_in) {
return str_uni_istype(IS_LOWER, self_in);
}
#if MICROPY_CPYTHON_COMPAT
// These methods are superfluous in the presense of str() and bytes()
// constructors.
@ -1569,6 +1634,11 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_2(str_partition_obj, str_partition);
STATIC MP_DEFINE_CONST_FUN_OBJ_2(str_rpartition_obj, str_rpartition);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(str_lower_obj, str_lower);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(str_upper_obj, str_upper);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(str_isspace_obj, str_isspace);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(str_isalpha_obj, str_isalpha);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(str_isdigit_obj, str_isdigit);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(str_isupper_obj, str_isupper);
STATIC MP_DEFINE_CONST_FUN_OBJ_1(str_islower_obj, str_islower);
STATIC const mp_map_elem_t str_locals_dict_table[] = {
#if MICROPY_CPYTHON_COMPAT
@ -1594,6 +1664,11 @@ STATIC const mp_map_elem_t str_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_rpartition), (mp_obj_t)&str_rpartition_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_lower), (mp_obj_t)&str_lower_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_upper), (mp_obj_t)&str_upper_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_isspace), (mp_obj_t)&str_isspace_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_isalpha), (mp_obj_t)&str_isalpha_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_isdigit), (mp_obj_t)&str_isdigit_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_isupper), (mp_obj_t)&str_isupper_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_islower), (mp_obj_t)&str_islower_obj },
};
STATIC MP_DEFINE_CONST_DICT(str_locals_dict, str_locals_dict_table);

5
py/qstrdefs.h
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@ -246,6 +246,11 @@ Q(partition)
Q(rpartition)
Q(lower)
Q(upper)
Q(isspace)
Q(isalpha)
Q(isdigit)
Q(isupper)
Q(islower)
Q(iterable)
Q(start)

20
tests/basics/string_istest.py Normal file
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@ -0,0 +1,20 @@
print("".isspace())
print(" \t\n\r\v\f".isspace())
print("a".isspace())
print(" \t\n\r\v\fa".isspace())
print("".isalpha())
print("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".isalpha())
print("0abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ".isalpha())
print("this ".isalpha())
print("".isdigit())
print("0123456789".isdigit())
print("0123456789a".isdigit())
print("0123456789 ".isdigit())
print("".isupper())
print("CHEESE-CAKE WITH ... _FROSTING_*99".isupper())
print("aB".isupper())
print("".islower())
print("cheese-cake with ... _frosting_*99".islower())
print("aB".islower())
print("123".islower())
print("123a".islower())