mirror of https://github.com/explosion/spaCy.git
54 lines
2.0 KiB
Cython
54 lines
2.0 KiB
Cython
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from libc.string cimport memcpy
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from murmurhash.mrmr cimport hash64
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cdef class StringStore:
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def __init__(self):
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self.mem = Pool()
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self.table = PreshMap()
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self._resize_at = 10000
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self.strings = <Utf8Str*>self.mem.alloc(self._resize_at, sizeof(Utf8Str))
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self.size = 1
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property size:
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def __get__(self):
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return self.size-1
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def __getitem__(self, string_or_id):
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cdef bytes byte_string
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cdef Utf8Str* utf8str
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if type(string_or_id) == int or type(string_or_id) == long:
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if string_or_id < 1 or string_or_id >= self.size:
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raise IndexError(string_or_id)
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utf8str = &self.strings[<int>string_or_id]
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return utf8str.chars[:utf8str.length]
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elif type(string_or_id) == bytes:
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utf8str = self.intern(<char*>string_or_id, len(string_or_id))
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return utf8str.i
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else:
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raise TypeError(type(string_or_id))
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cdef Utf8Str* intern(self, char* chars, int length) except NULL:
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# 0 means missing, but we don't bother offsetting the index. We waste
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# slot 0 to simplify the code, because it doesn't matter.
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assert length != 0
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cdef hash_t key = hash64(chars, length * sizeof(char), 0)
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cdef void* value = self.table.get(key)
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cdef size_t i
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if value == NULL:
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if self.size == self._resize_at:
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self._resize_at *= 2
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self.strings = <Utf8Str*>self.mem.realloc(self.strings, self._resize_at * sizeof(Utf8Str))
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i = self.size
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self.strings[i].i = self.size
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self.strings[i].key = key
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self.strings[i].chars = <char*>self.mem.alloc(length, sizeof(char))
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memcpy(self.strings[i].chars, chars, length)
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self.strings[i].length = length
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self.table.set(key, <void*>self.size)
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self.size += 1
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else:
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i = <size_t>value
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return &self.strings[i]
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