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from libc.stdlib cimport malloc, calloc, realloc, free, strtof, strtol
from libc.string cimport strsep, strcpy, strlen
cdef class Phrase:
def __cinit__(self, words):
cdef int i, j, n, n_vars
n_vars = 0
n = len(words)
self.syms = <int *>malloc(n*sizeof(int))
for i from 0 <= i < n:
self.syms[i] = words[i]
if sym_isvar(self.syms[i]):
n_vars += 1
self.n = n
self.n_vars = n_vars
self.varpos = <int *>malloc(n_vars*sizeof(int))
j = 0
for i from 0 <= i < n:
if sym_isvar(self.syms[i]):
self.varpos[j] = i
j = j + 1
def __dealloc__(self):
free(self.syms)
free(self.varpos)
def __str__(self):
strs = []
cdef int i, s
for i from 0 <= i < self.n:
s = self.syms[i]
strs.append(sym_tostring(s))
return ' '.join(strs)
def handle(self):
"""return a hashable representation that normalizes the ordering
of the nonterminal indices"""
norm = []
cdef int i, j, s
i = 1
j = 0
for j from 0 <= j < self.n:
s = self.syms[j]
if sym_isvar(s):
s = sym_setindex(s,i)
i = i + 1
norm.append(s)
return tuple(norm)
def strhandle(self):
strs = []
norm = []
cdef int i, j, s
i = 1
j = 0
for j from 0 <= j < self.n:
s = self.syms[j]
if sym_isvar(s):
s = sym_setindex(s,i)
i = i + 1
norm.append(sym_tostring(s))
return ' '.join(norm)
def arity(self):
return self.n_vars
def getvarpos(self, i):
if 0 <= i < self.n_vars:
return self.varpos[i]
else:
raise IndexError
def getvar(self, i):
if 0 <= i < self.n_vars:
return self.syms[self.varpos[i]]
else:
raise IndexError
cdef int chunkpos(self, int k):
if k == 0:
return 0
else:
return self.varpos[k-1]+1
cdef int chunklen(self, int k):
if self.n_vars == 0:
return self.n
elif k == 0:
return self.varpos[0]
elif k == self.n_vars:
return self.n-self.varpos[k-1]-1
else:
return self.varpos[k]-self.varpos[k-1]-1
def clen(self, k):
return self.chunklen(k)
def getchunk(self, ci):
cdef int start, stop
start = self.chunkpos(ci)
stop = start+self.chunklen(ci)
chunk = []
for i from start <= i < stop:
chunk.append(self.syms[i])
return chunk
def __cmp__(self, other):
cdef Phrase otherp
cdef int i
otherp = other
for i from 0 <= i < min(self.n, otherp.n):
if self.syms[i] < otherp.syms[i]:
return -1
elif self.syms[i] > otherp.syms[i]:
return 1
if self.n < otherp.n:
return -1
elif self.n > otherp.n:
return 1
else:
return 0
def __hash__(self):
cdef int i
cdef unsigned h
h = 0
for i from 0 <= i < self.n:
if self.syms[i] > 0:
h = (h << 1) + self.syms[i]
else:
h = (h << 1) + -self.syms[i]
return h
def __len__(self):
return self.n
def __getitem__(self, i):
return self.syms[i]
def __iter__(self):
cdef int i
for i from 0 <= i < self.n:
yield self.syms[i]
def subst(self, start, children):
cdef int i
for i from 0 <= i < self.n:
if sym_isvar(self.syms[i]):
start = start + children[sym_getindex(self.syms[i])-1]
else:
start = start + (self.syms[i],)
return start
property words:
def __get__(self):
return [sym_tostring(w) for w in self if not sym_isvar(w)]
cdef class Rule:
def __cinit__(self, int lhs, Phrase f, Phrase e, scores=None, word_alignments=None):
if not sym_isvar(lhs): raise Exception('Invalid LHS symbol: %d' % lhs)
self.lhs = lhs
self.f = f
self.e = e
self.word_alignments = word_alignments
self.scores = scores
def __hash__(self):
return hash((self.lhs, self.f, self.e))
def __cmp__(self, Rule other):
return cmp((self.lhs, self.f, self.e, self.word_alignments),
(other.lhs, other.f, other.e, self.word_alignments))
def fmerge(self, Phrase f):
if self.f == f:
self.f = f
def arity(self):
return self.f.arity()
def __str__(self):
cdef unsigned i
fields = [sym_tostring(self.lhs), str(self.f), str(self.e), str(self.scores)]
if self.word_alignments is not None:
fields.append(' '.join('%d-%d' % a for a in self.alignments()))
return ' ||| '.join(fields)
def alignments(self):
for point in self.word_alignments:
yield point/65536, point%65536
|
