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# Copyright (C) 2009, 2010 Canonical Ltd
#
# This program 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 2 of the License, or
# (at your option) any later version.
#
# This program 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 this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
#
# cython: language_level=3
"""Pyrex implementation of _read_stanza_*."""
cdef extern from "python-compat.h":
pass
from cpython.bytes cimport (
PyBytes_CheckExact,
PyBytes_FromStringAndSize,
PyBytes_AS_STRING,
PyBytes_GET_SIZE,
)
from cpython.unicode cimport (
PyUnicode_CheckExact,
PyUnicode_DecodeUTF8,
# Deprecated after PEP 393 changes
PyUnicode_AS_UNICODE,
PyUnicode_FromUnicode,
PyUnicode_GET_SIZE,
)
from cpython.list cimport (
PyList_Append,
)
from cpython.mem cimport (
PyMem_Free,
PyMem_Malloc,
PyMem_Realloc,
)
from cpython.version cimport (
PY_MAJOR_VERSION,
)
cdef extern from "Python.h":
ctypedef int Py_UNICODE
object PyUnicode_EncodeASCII(Py_UNICODE *, int, char *)
int Py_UNICODE_ISLINEBREAK(Py_UNICODE)
# GZ 2017-09-11: Not sure why cython unicode module lacks this?
object PyUnicode_FromStringAndSize(const char *u, Py_ssize_t size)
# Python 3.3 or later unicode handling
char* PyUnicode_AsUTF8AndSize(object unicode, Py_ssize_t *size)
from libc.string cimport (
memcpy,
)
from .rio import Stanza
cdef int _valid_tag_char(char c): # cannot_raise
return (c == c'_' or c == c'-' or
(c >= c'a' and c <= c'z') or
(c >= c'A' and c <= c'Z') or
(c >= c'0' and c <= c'9'))
def _valid_tag(tag):
cdef char *c_tag
cdef Py_ssize_t c_len
cdef int i
# GZ 2017-09-11: Encapsulate native string as ascii tag somewhere neater
if PY_MAJOR_VERSION >= 3:
if not PyUnicode_CheckExact(tag):
raise TypeError(tag)
c_tag = PyUnicode_AsUTF8AndSize(tag, &c_len)
else:
if not PyBytes_CheckExact(tag):
raise TypeError(tag)
c_tag = PyBytes_AS_STRING(tag)
c_len = PyBytes_GET_SIZE(tag)
if c_len < 1:
return False
for i from 0 <= i < c_len:
if not _valid_tag_char(c_tag[i]):
return False
return True
cdef object _split_first_line_utf8(char *line, int len,
char *value, Py_ssize_t *value_len):
cdef int i
for i from 0 <= i < len:
if line[i] == c':':
if line[i+1] != c' ':
raise ValueError("invalid tag in line %r" % line)
memcpy(value, line+i+2, len-i-2)
value_len[0] = len-i-2
if PY_MAJOR_VERSION >= 3:
return PyUnicode_FromStringAndSize(line, i)
return PyBytes_FromStringAndSize(line, i)
raise ValueError('tag/value separator not found in line %r' % line)
cdef object _split_first_line_unicode(Py_UNICODE *line, int len,
Py_UNICODE *value, Py_ssize_t *value_len):
cdef int i
for i from 0 <= i < len:
if line[i] == c':':
if line[i+1] != c' ':
raise ValueError("invalid tag in line %r" %
PyUnicode_FromUnicode(line, len))
memcpy(value, &line[i+2], (len-i-2) * sizeof(Py_UNICODE))
value_len[0] = len-i-2
if PY_MAJOR_VERSION >= 3:
return PyUnicode_FromUnicode(line, i)
return PyUnicode_EncodeASCII(line, i, "strict")
raise ValueError("tag/value separator not found in line %r" %
PyUnicode_FromUnicode(line, len))
def _read_stanza_utf8(line_iter):
cdef char *c_line
cdef Py_ssize_t c_len
cdef char *accum_value
cdef char *new_accum_value
cdef Py_ssize_t accum_len, accum_size
pairs = []
tag = None
accum_len = 0
accum_size = 4096
accum_value = <char *>PyMem_Malloc(accum_size)
if accum_value == NULL:
raise MemoryError
try:
for line in line_iter:
if line is None:
break # end of file
if not PyBytes_CheckExact(line):
raise TypeError("%r is not a plain string" % line)
c_line = PyBytes_AS_STRING(line)
c_len = PyBytes_GET_SIZE(line)
if c_len < 1:
break # end of file
if c_len == 1 and c_line[0] == c"\n":
break # end of stanza
if accum_len + c_len > accum_size:
accum_size = (accum_len + c_len)
new_accum_value = <char *>PyMem_Realloc(accum_value, accum_size)
if new_accum_value == NULL:
raise MemoryError
else:
accum_value = new_accum_value
if c_line[0] == c'\t': # continues previous value
if tag is None:
raise ValueError('invalid continuation line %r' % line)
memcpy(accum_value+accum_len, c_line+1, c_len-1)
accum_len = accum_len + c_len-1
else: # new tag:value line
if tag is not None:
PyList_Append(pairs,
(tag, PyUnicode_DecodeUTF8(accum_value, accum_len-1,
"strict")))
tag = _split_first_line_utf8(c_line, c_len, accum_value,
&accum_len)
if not _valid_tag(tag):
raise ValueError("invalid rio tag %r" % (tag,))
if tag is not None: # add last tag-value
PyList_Append(pairs,
(tag, PyUnicode_DecodeUTF8(accum_value, accum_len-1, "surrogateescape")))
return Stanza.from_pairs(pairs)
else: # didn't see any content
return None
finally:
PyMem_Free(accum_value)
def _read_stanza_unicode(unicode_iter):
cdef Py_UNICODE *c_line
cdef int c_len
cdef Py_UNICODE *accum_value
cdef Py_UNICODE *new_accum_value
cdef Py_ssize_t accum_len, accum_size
pairs = []
tag = None
accum_len = 0
accum_size = 4096
accum_value = <Py_UNICODE *>PyMem_Malloc(accum_size*sizeof(Py_UNICODE))
if accum_value == NULL:
raise MemoryError
try:
for line in unicode_iter:
if line is None:
break # end of file
if not PyUnicode_CheckExact(line):
raise TypeError("%r is not a unicode string" % line)
c_line = PyUnicode_AS_UNICODE(line)
c_len = PyUnicode_GET_SIZE(line)
if c_len < 1:
break # end of file
if Py_UNICODE_ISLINEBREAK(c_line[0]):
break # end of stanza
if accum_len + c_len > accum_size:
accum_size = accum_len + c_len
new_accum_value = <Py_UNICODE *>PyMem_Realloc(accum_value,
accum_size*sizeof(Py_UNICODE))
if new_accum_value == NULL:
raise MemoryError
else:
accum_value = new_accum_value
if c_line[0] == c'\t': # continues previous value,
if tag is None:
raise ValueError('invalid continuation line %r' % line)
memcpy(&accum_value[accum_len], &c_line[1],
(c_len-1)*sizeof(Py_UNICODE))
accum_len = accum_len + (c_len-1)
else: # new tag:value line
if tag is not None:
PyList_Append(pairs,
(tag, PyUnicode_FromUnicode(accum_value, accum_len-1)))
tag = _split_first_line_unicode(c_line, c_len, accum_value,
&accum_len)
if not _valid_tag(tag):
raise ValueError("invalid rio tag %r" % (tag,))
if tag is not None: # add last tag-value
PyList_Append(pairs,
(tag, PyUnicode_FromUnicode(accum_value, accum_len-1)))
return Stanza.from_pairs(pairs)
else: # didn't see any content
return None
finally:
PyMem_Free(accum_value)
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