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# Defines "data arrays" that can be directly written to/read from disk in binary format
# In particular, the array itself is written/read directly as a glob of binary data
# Adam Lopez <alopez@cs.umd.edu>
from libc.stdio cimport FILE, fopen, fread, fwrite, fclose
from libc.stdlib cimport malloc, realloc, free
from libc.string cimport memset, strcpy
cdef class DataArray:
cdef public word2id
cdef public id2word
cdef public IntList data
cdef public IntList sent_id
cdef public IntList sent_index
cdef bint use_sent_id
def __cinit__(self, from_binary=None, from_text=None, side=None, bint use_sent_id=False):
self.word2id = {"END_OF_FILE":0, "END_OF_LINE":1}
self.id2word = ["END_OF_FILE", "END_OF_LINE"]
self.data = IntList(1000,1000)
self.sent_id = IntList(1000,1000)
self.sent_index = IntList(1000,1000)
self.use_sent_id = use_sent_id
if from_binary:
self.read_binary(from_binary)
elif from_text:
if side:
self.read_bitext(from_text, (0 if side == 'source' else 1))
else:
self.read_text(from_text)
def __len__(self):
return len(self.data)
def get_sentence_id(self, i):
return self.sent_id.arr[i]
def get_sentence(self, i):
cdef int j, start, stop
sent = []
start = self.sent_index.arr[i]
stop = self.sent_index.arr[i+1]
for i from start <= i < stop:
sent.append(self.id2word[self.data.arr[i]])
return sent
def get_id(self, word):
if not word in self.word2id:
self.word2id[word] = len(self.id2word)
self.id2word.append(word)
return self.word2id[word]
def __getitem__(self, loc):
return self.id2word[self.data.arr[loc]]
def get_sentence_bounds(self, loc):
cdef int sid = self.sent_id.arr[loc]
return (self.sent_index.arr[sid], self.sent_index.arr[sid+1])
def write_text(self, char* filename):
with open(filename, "w") as f:
for w_id in self.data:
if w_id > 1:
f.write("%s " % self.get_word(w_id))
if w_id == 1:
f.write("\n")
def read_text(self, char* filename):
with gzip_or_text(filename) as fp:
self.read_text_data(fp)
def read_bitext(self, char* filename, int side):
with gzip_or_text(filename) as fp:
data = (line.split(' ||| ')[side] for line in fp)
self.read_text_data(data)
def read_text_data(self, data):
cdef int word_count = 0
for line_num, line in enumerate(data):
self.sent_index.append(word_count)
for word in line.split():
self.data.append(self.get_id(word))
if self.use_sent_id:
self.sent_id.append(line_num)
word_count = word_count + 1
self.data.append(1)
if self.use_sent_id:
self.sent_id.append(line_num)
word_count = word_count + 1
self.data.append(0)
self.sent_index.append(word_count)
def read_binary(self, char* filename):
cdef FILE* f
f = fopen(filename, "r")
self.read_handle(f)
fclose(f)
cdef void read_handle(self, FILE* f):
cdef int num_words, word_len
cdef unsigned i
cdef char* word
self.data.read_handle(f)
self.sent_index.read_handle(f)
self.sent_id.read_handle(f)
fread(&(num_words), sizeof(int), 1, f)
for i in range(num_words):
fread(&(word_len), sizeof(int), 1, f)
word = <char*> malloc (word_len * sizeof(char))
fread(word, sizeof(char), word_len, f)
self.word2id[word] = len(self.id2word)
self.id2word.append(word)
free(word)
if len(self.sent_id) == 0:
self.use_sent_id = False
else:
self.use_sent_id = True
cdef void write_handle(self, FILE* f):
cdef int word_len
cdef int num_words
self.data.write_handle(f)
self.sent_index.write_handle(f)
self.sent_id.write_handle(f)
num_words = len(self.id2word) - 2
fwrite(&(num_words), sizeof(int), 1, f)
for word in self.id2word[2:]:
word_len = len(word) + 1
fwrite(&(word_len), sizeof(int), 1, f)
fwrite(<char *>word, sizeof(char), word_len, f)
def write_binary(self, char* filename):
cdef FILE* f
f = fopen(filename, "w")
self.write_handle(f)
fclose(f)
def write_enhanced_handle(self, f):
for i in self.data:
f.write("%d " %i)
f.write("\n")
for i in self.sent_index:
f.write("%d " %i)
f.write("\n")
for i in self.sent_id:
f.write("%d " %i)
f.write("\n")
for word in self.id2word:
f.write("%s %d " % (word, self.word2id[word]))
f.write("\n")
def write_enhanced(self, char* filename):
with open(filename, "w") as f:
self.write_enhanced_handle(self, f)
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