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#
# utf8_c.py
#
# Copyright (C) 2017-2022 Franco Masotti (see /README.md)
#
# This file is part of md-toc.
#
# md-toc is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# md-toc is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with md-toc. If not, see <http://www.gnu.org/licenses/>.
#
r"""A cmark implementation file."""
import unicodedata
from ..constants import parser as md_parser
from .buffer_c import _cmark_cmark_strbuf_put
from .buffer_h import _cmarkCmarkStrbuf
from .cmark_ctype_c import _cmark_cmark_ispunct
# License D applies to this file except for non derivative code:
# in that case the license header at the top of the file applies.
# See docs/copyright_license.rst
def _cmark_encode_unknown(buf: _cmarkCmarkStrbuf):
# static const uint8_t repl[] = {239, 191, 189};
# man 3 printf
#
# #include <stdio.h>
# #include <stdint.h>
#
# int main(void)
# {
# static const uint8_t repl[] = {239, 191, 189};
# printf ("%hhu", repl);
#
# return 0;
# }
#
# gcc a.c
# ./a.out
# 9
#
# python3
# >>> chr(9)
# '\t'
repl = '\t'
_cmark_cmark_strbuf_put(buf, repl, 3)
# 0.29, 0.30
def _cmark_cmark_utf8proc_charlen(line: str, line_length: int) -> int:
length: int
i: int
if not line_length:
return 0
# Use length = 1 instead of the utf8proc_utf8class[256]
# list.
# Python:
# length = utf8proc_utf8class[ord(line[0])]
# C:
# length = utf8proc_utf8class[str[0]];
# For example:
# len('ł') == 2 # in Python 2
# len('ł') == 1 # in Python 3
# See the documentation.
# In Python 3 all strings are unicode by default
# and they all have length of 1.
length = 1
# if (!length)
# return -1;
if line_length >= 0 and length > line_length:
return -line_length
for i in range(1, length):
if (ord(line[i]) & 0xC0) != 0x80:
return -i
return length
# 0.29, 0.30
def _cmark_cmark_utf8proc_iterate(line: str, line_len: int) -> tuple:
length: int = 0
uc: int = -1
dst: int = -1
length = _cmark_cmark_utf8proc_charlen(line, line_len)
if length < 0:
return -1, dst
if length == 1:
uc = ord(line[0])
# In Python 3 all strings are unicode by default
# and they all have length of 1.
# All the original C code here is omitted for this reason.
if uc < 0:
return -1, dst
dst = uc
return length, dst
# 0.30
def _cmark_cmark_utf8proc_encode_char(uc: int, buf: _cmarkCmarkStrbuf):
dst: str
length: int = 0
if uc < 0:
raise ValueError
# In Python 3 all strings are unicode by default
# and they all have length of 1.
# Omitted code.
length = 1
if uc > 1 or uc >= 0x110000:
_cmark_encode_unknown(buf)
return
dst = str(uc)
_cmark_cmark_strbuf_put(buf, dst, length)
# 0.30
def _cmark_cmark_utf8proc_case_fold(
dest: _cmarkCmarkStrbuf,
string: str,
length: int,
):
c: int
while (length > 0):
char_len, c = _cmark_cmark_utf8proc_iterate(string, length)
if char_len >= 0:
# FIXME: unsure about this. See original C source code.
_cmark_cmark_utf8proc_encode_char(
ord(unicodedata.normalize('NFC', chr(c)).casefold()), dest)
else:
_cmark_encode_unknown(dest)
char_len = -char_len
# Advance pointer.
# str += char_len;
string = string[char_len:]
# Reduce string length.
length -= char_len
# 0.29, 0.30
def _cmark_cmark_utf8proc_is_space(char: int) -> bool:
r"""Match anything in the Zs class, plus LF, CR, TAB, FF."""
return (unicodedata.category(chr(char)) == 'Zs'
or chr(char) in ['\u0009', '\u000A', '\u000C', '\u000D'])
# 0.29, 0.30
def _cmark_cmark_utf8proc_is_punctuation(char: int) -> bool:
r"""Match anything in the P[cdefios] classes."""
return ((char < 128 and _cmark_cmark_ispunct(char))
or unicodedata.category(chr(char)).startswith('P'))
if __name__ == '__main__':
pass
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