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* Add some bounds checking around state arrays

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Matthew Honnibal 2015-06-23 04:13:09 +02:00
parent 89ae218b75
commit 065c2e1d2d
2 changed files with 19 additions and 8 deletions
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2
spacy/syntax/stateclass.pxd
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@ -28,6 +28,8 @@ cdef class StateClass:
for i in range(length): for i in range(length):
self._sent[i] = sent[i] self._sent[i] = sent[i]
self._buffer[i] = i self._buffer[i] = i
for i in range(length, length + 5):
self._sent[i].lex = &EMPTY_LEXEME
return self return self
cdef inline int S(self, int i) nogil: cdef inline int S(self, int i) nogil:

9
spacy/syntax/stateclass.pyx
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@ -34,6 +34,10 @@ cdef class StateClass:
return self._sent[i].head + i return self._sent[i].head + i
cdef int E(self, int i) nogil: cdef int E(self, int i) nogil:
if self._e_i <= 0 or self._e_i >= self.length:
return -1
if i <= 0 or i >= self.length:
return -1
return self._ents[self._e_i-1].start return self._ents[self._e_i-1].start
cdef int L(self, int i, int idx) nogil: cdef int L(self, int i, int idx) nogil:
@ -145,6 +149,7 @@ cdef class StateClass:
return self.length - self._b_i return self.length - self._b_i
cdef void push(self) nogil: cdef void push(self) nogil:
if self.B(0) != -1:
self._stack[self._s_i] = self.B(0) self._stack[self._s_i] = self.B(0)
self._s_i += 1 self._s_i += 1
self._b_i += 1 self._b_i += 1
@ -152,6 +157,7 @@ cdef class StateClass:
self._break = -1 self._break = -1
cdef void pop(self) nogil: cdef void pop(self) nogil:
if self._s_i >= 1:
self._s_i -= 1 self._s_i -= 1
cdef void unshift(self) nogil: cdef void unshift(self) nogil:
@ -197,6 +203,7 @@ cdef class StateClass:
self._sent[head].l_kids -= 1 self._sent[head].l_kids -= 1
cdef void open_ent(self, int label) nogil: cdef void open_ent(self, int label) nogil:
if 0 <= self._e_i < self.length:
self._ents[self._e_i].start = self.B(0) self._ents[self._e_i].start = self.B(0)
self._ents[self._e_i].label = label self._ents[self._e_i].label = label
self._ents[self._e_i].end = -1 self._ents[self._e_i].end = -1
@ -212,6 +219,7 @@ cdef class StateClass:
self._sent[i].ent_type = ent_type self._sent[i].ent_type = ent_type
cdef void set_break(self, int _) nogil: cdef void set_break(self, int _) nogil:
if 0 <= self.B(0) < self.length:
self._sent[self.B(0)].sent_end = True self._sent[self.B(0)].sent_end = True
self._break = self._b_i self._break = self._b_i
@ -223,6 +231,7 @@ cdef class StateClass:
self._b_i = src._b_i self._b_i = src._b_i
self._s_i = src._s_i self._s_i = src._s_i
self._e_i = src._e_i self._e_i = src._e_i
self._break = src._break
def print_state(self, words): def print_state(self, words):
words = list(words) + ['_'] words = list(words) + ['_']