spaCy/spacy/cfile.pyx
2016-09-24 22:01:46 +02:00

48 lines
1.6 KiB
Cython

from libc.stdio cimport fopen, fclose, fread, fwrite, FILE
cdef class CFile:
def __init__(self, loc, mode, on_open_error=None):
if isinstance(mode, unicode):
mode_str = mode.encode('ascii')
else:
mode_str = mode
if hasattr(loc, 'as_posix'):
loc = loc.as_posix()
cdef bytes bytes_loc = loc.encode('utf8') if type(loc) == unicode else loc
self.fp = fopen(<char*>bytes_loc, mode_str)
if self.fp == NULL:
if on_open_error is not None:
on_open_error()
else:
raise IOError("Could not open binary file %s" % bytes_loc)
self.is_open = True
def __dealloc__(self):
if self.is_open:
fclose(self.fp)
def close(self):
fclose(self.fp)
self.is_open = False
cdef int read_into(self, void* dest, size_t number, size_t elem_size) except -1:
st = fread(dest, elem_size, number, self.fp)
if st != number:
raise IOError
cdef int write_from(self, void* src, size_t number, size_t elem_size) except -1:
st = fwrite(src, elem_size, number, self.fp)
if st != number:
raise IOError
cdef void* alloc_read(self, Pool mem, size_t number, size_t elem_size) except *:
cdef void* dest = mem.alloc(number, elem_size)
self.read_into(dest, number, elem_size)
return dest
def write_unicode(self, unicode value):
cdef bytes py_bytes = value.encode('utf8')
cdef char* chars = <char*>py_bytes
self.write(sizeof(char), len(py_bytes), chars)