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