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# -*- coding: iso-8859-1 -*-

cimport cython

cdef Py_UNICODE char_ASCII = u'A'
cdef Py_UNICODE char_KLINGON = u'\uF8D2'

def compare_ASCII():
    """
>>> compare_ASCII()
True
False
False
"""
    print(char_ASCII == u'A')
    print(char_ASCII == u'B')
    print(char_ASCII == u'\uF8D2')


def compare_klingon():
    """
>>> compare_klingon()
True
False
False
"""
    print(char_KLINGON == u'\uF8D2')
    print(char_KLINGON == u'A')
    print(char_KLINGON == u'B')


from cpython.unicode cimport PyUnicode_FromOrdinal
import sys

u0 = u'\x00'
u1 = u'\x01'
umax = PyUnicode_FromOrdinal(sys.maxunicode)

def unicode_ordinal(Py_UNICODE i):
    """
>>> ord(unicode_ordinal(0)) == 0
True
>>> ord(unicode_ordinal(1)) == 1
True
>>> ord(unicode_ordinal(sys.maxunicode)) == sys.maxunicode
True

>>> ord(unicode_ordinal(u0)) == 0
True
>>> ord(unicode_ordinal(u1)) == 1
True
>>> ord(unicode_ordinal(umax)) == sys.maxunicode
True

Value too small:
>>> unicode_ordinal(-1) #doctest: +ELLIPSIS
Traceback (most recent call last):
...
OverflowError: ...

Value too large:
>>> unicode_ordinal(sys.maxunicode+1) #doctest: +ELLIPSIS
Traceback (most recent call last):
...
OverflowError: ...

Less than one character:
>>> unicode_ordinal(u0[:0])
Traceback (most recent call last):
...
ValueError: only single character unicode strings can be converted to Py_UNICODE, got length 0

More than one character:
>>> unicode_ordinal(u0+u1)
Traceback (most recent call last):
...
ValueError: only single character unicode strings can be converted to Py_UNICODE, got length 2
"""
    return i

@cython.test_assert_path_exists('//PythonCapiCallNode')
@cython.test_fail_if_path_exists('//SimpleCallNode')
def unicode_type_methods(Py_UNICODE uchar):
    """
>>> unicode_type_methods(ord('A'))
[True, True, False, False, False, False, False, True, True]
>>> unicode_type_methods(ord('a'))
[True, True, False, False, True, False, False, False, False]
>>> unicode_type_methods(ord('8'))
[True, False, True, True, False, True, False, False, False]
>>> unicode_type_methods(ord('\\t'))
[False, False, False, False, False, False, True, False, False]
"""
    return [
        # character types
        uchar.isalnum(),
        uchar.isalpha(),
        uchar.isdecimal(),
        uchar.isdigit(),
        uchar.islower(),
        uchar.isnumeric(),
        uchar.isspace(),
        uchar.istitle(),
        uchar.isupper(),
        ]

@cython.test_assert_path_exists('//PythonCapiCallNode')
@cython.test_fail_if_path_exists('//SimpleCallNode')
def unicode_methods(Py_UNICODE uchar):
    """
>>> unicode_methods(ord('A')) == ['a', 'A', 'A']
True
>>> unicode_methods(ord('a')) == ['a', 'A', 'A']
True
"""
    return [
        # character conversion
        uchar.lower(),
        uchar.upper(),
        uchar.title(),
        ]

@cython.test_assert_path_exists('//IntNode')
@cython.test_fail_if_path_exists('//SimpleCallNode',
                                 '//PythonCapiCallNode')
def len_uchar(Py_UNICODE uchar):
    """
>>> len_uchar(ord('A'))
1
"""
    return len(uchar)

def index_uchar(Py_UNICODE uchar, Py_ssize_t i):
    """
>>> index_uchar(ord('A'), 0) == ('A', 'A', 'A')
True
>>> index_uchar(ord('A'), -1) == ('A', 'A', 'A')
True
>>> index_uchar(ord('A'), 1)
Traceback (most recent call last):
IndexError: string index out of range
"""
    return uchar[0], uchar[-1], uchar[i]

mixed_ustring = u'AbcDefGhIjKlmnoP'
lower_ustring = mixed_ustring.lower()
upper_ustring = mixed_ustring.lower()

@cython.test_assert_path_exists('//PythonCapiCallNode',
                                '//ForFromStatNode')
@cython.test_fail_if_path_exists('//SimpleCallNode',
                                 '//ForInStatNode')
def count_lower_case_characters(unicode ustring):
    """
>>> count_lower_case_characters(mixed_ustring)
10
>>> count_lower_case_characters(lower_ustring)
16
"""
    cdef Py_ssize_t count = 0
    for uchar in ustring:
         if uchar.islower():
             count += 1
    return count

@cython.test_assert_path_exists('//PythonCapiCallNode',
                                '//ForFromStatNode')
@cython.test_fail_if_path_exists('//SimpleCallNode',
                                 '//ForInStatNode')
def count_lower_case_characters_slice(unicode ustring):
    """
>>> count_lower_case_characters_slice(mixed_ustring)
10
>>> count_lower_case_characters_slice(lower_ustring)
14
"""
    cdef Py_ssize_t count = 0
    for uchar in ustring[1:-1]:
         if uchar.islower():
             count += 1
    return count

@cython.test_assert_path_exists('//SwitchStatNode',
                                '//ForFromStatNode')
@cython.test_fail_if_path_exists('//ForInStatNode')
def iter_and_in():
    """
>>> iter_and_in()
a
b
e
f
h
"""
    for c in u'abcdefgh':
        if c in u'abCDefGh':
            print c

@cython.test_assert_path_exists('//SwitchStatNode')
@cython.test_fail_if_path_exists('//ForInStatNode')
def index_and_in():
    """
>>> index_and_in()
1
3
4
7
8
"""
    cdef int i
    for i in range(1,9):
        if u'abcdefgh'[-i] in u'abCDefGh':
            print i
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