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Diffstat (limited to 'python/src/sa/bilex.pxi')
| -rw-r--r-- | python/src/sa/bilex.pxi | 413 |
1 files changed, 0 insertions, 413 deletions
diff --git a/python/src/sa/bilex.pxi b/python/src/sa/bilex.pxi deleted file mode 100644 index 44bc0ce6..00000000 --- a/python/src/sa/bilex.pxi +++ /dev/null @@ -1,413 +0,0 @@ -# defines bilexical dictionaries in C, with some convenience methods -# for reading arrays directly as globs directly from disk. -# 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 struct _node: - _node* smaller - _node* bigger - int key - int val - -cdef _node* new_node(int key): - cdef _node* n - n = <_node*> malloc(sizeof(_node)) - n.smaller = NULL - n.bigger = NULL - n.key = key - n.val = 0 - return n - - -cdef del_node(_node* n): - if n.smaller != NULL: - del_node(n.smaller) - if n.bigger != NULL: - del_node(n.bigger) - free(n) - -cdef int* get_val(_node* n, int key): - if key == n.key: - return &n.val - elif key < n.key: - if n.smaller == NULL: - n.smaller = new_node(key) - return &(n.smaller.val) - return get_val(n.smaller, key) - else: - if n.bigger == NULL: - n.bigger = new_node(key) - return &(n.bigger.val) - return get_val(n.bigger, key) - - -cdef class BiLex: - cdef FloatList col1 - cdef FloatList col2 - cdef IntList f_index - cdef IntList e_index - cdef id2eword, id2fword, eword2id, fword2id - - def __cinit__(self, from_text=None, from_data=False, from_binary=None, - earray=None, fsarray=None, alignment=None): - self.id2eword = [] - self.id2fword = [] - self.eword2id = {} - self.fword2id = {} - self.e_index = IntList() - self.f_index = IntList() - self.col1 = FloatList() - self.col2 = FloatList() - if from_binary: - self.read_binary(from_binary) - elif from_data: - self.compute_from_data(fsarray, earray, alignment) - else: - self.read_text(from_text) - - - cdef compute_from_data(self, SuffixArray fsa, DataArray eda, Alignment aa): - cdef int sent_id, num_links, l, i, j, f_i, e_j, I, J, V_E, V_F, num_pairs - cdef int *fsent, *esent, *alignment, *links, *ealigned, *faligned - cdef _node** dict - cdef int *fmargin, *emargin, *count - cdef int null_word - - null_word = 0 - for word in fsa.darray.id2word: # I miss list comprehensions - self.id2fword.append(word) - self.id2fword[null_word] = "NULL" - for id, word in enumerate(self.id2fword): - self.fword2id[word] = id - - for word in eda.id2word: - self.id2eword.append(word) - self.id2eword[null_word] = "NULL" - for id, word in enumerate(self.id2eword): - self.eword2id[word] = id - - num_pairs = 0 - - V_E = len(eda.id2word) - V_F = len(fsa.darray.id2word) - fmargin = <int*> malloc(V_F*sizeof(int)) - emargin = <int*> malloc(V_E*sizeof(int)) - memset(fmargin, 0, V_F*sizeof(int)) - memset(emargin, 0, V_E*sizeof(int)) - - dict = <_node**> malloc(V_F*sizeof(_node*)) - memset(dict, 0, V_F*sizeof(_node*)) - - num_sents = len(fsa.darray.sent_index) - for sent_id from 0 <= sent_id < num_sents-1: - - fsent = fsa.darray.data.arr + fsa.darray.sent_index.arr[sent_id] - I = fsa.darray.sent_index.arr[sent_id+1] - fsa.darray.sent_index.arr[sent_id] - 1 - faligned = <int*> malloc(I*sizeof(int)) - memset(faligned, 0, I*sizeof(int)) - - esent = eda.data.arr + eda.sent_index.arr[sent_id] - J = eda.sent_index.arr[sent_id+1] - eda.sent_index.arr[sent_id] - 1 - ealigned = <int*> malloc(J*sizeof(int)) - memset(ealigned, 0, J*sizeof(int)) - - links = aa._get_sent_links(sent_id, &num_links) - - for l from 0 <= l < num_links: - i = links[l*2] - j = links[l*2+1] - if i >= I or j >= J: - raise Exception("%d-%d out of bounds (I=%d,J=%d) in line %d\n" % (i,j,I,J,sent_id+1)) - f_i = fsent[i] - e_j = esent[j] - fmargin[f_i] = fmargin[f_i]+1 - emargin[e_j] = emargin[e_j]+1 - if dict[f_i] == NULL: - dict[f_i] = new_node(e_j) - dict[f_i].val = 1 - num_pairs = num_pairs + 1 - else: - count = get_val(dict[f_i], e_j) - if count[0] == 0: - num_pairs = num_pairs + 1 - count[0] = count[0] + 1 - # add count - faligned[i] = 1 - ealigned[j] = 1 - for i from 0 <= i < I: - if faligned[i] == 0: - f_i = fsent[i] - fmargin[f_i] = fmargin[f_i] + 1 - emargin[null_word] = emargin[null_word] + 1 - if dict[f_i] == NULL: - dict[f_i] = new_node(null_word) - dict[f_i].val = 1 - num_pairs = num_pairs + 1 - else: - count = get_val(dict[f_i], null_word) - if count[0] == 0: - num_pairs = num_pairs + 1 - count[0] = count[0] + 1 - for j from 0 <= j < J: - if ealigned[j] == 0: - e_j = esent[j] - fmargin[null_word] = fmargin[null_word] + 1 - emargin[e_j] = emargin[e_j] + 1 - if dict[null_word] == NULL: - dict[null_word] = new_node(e_j) - dict[null_word].val = 1 - num_pairs = num_pairs + 1 - else: - count = get_val(dict[null_word], e_j) - if count[0] == 0: - num_pairs = num_pairs + 1 - count[0] = count[0] + 1 - free(links) - free(faligned) - free(ealigned) - self.f_index = IntList(initial_len=V_F) - self.e_index = IntList(initial_len=num_pairs) - self.col1 = FloatList(initial_len=num_pairs) - self.col2 = FloatList(initial_len=num_pairs) - - num_pairs = 0 - for i from 0 <= i < V_F: - #self.f_index[i] = num_pairs - self.f_index.set(i, num_pairs) - if dict[i] != NULL: - self._add_node(dict[i], &num_pairs, float(fmargin[i]), emargin) - del_node(dict[i]) - free(fmargin) - free(emargin) - free(dict) - return - - - cdef _add_node(self, _node* n, int* num_pairs, float fmargin, int* emargin): - cdef int loc - if n.smaller != NULL: - self._add_node(n.smaller, num_pairs, fmargin, emargin) - loc = num_pairs[0] - self.e_index.set(loc, n.key) - self.col1.set(loc, float(n.val)/fmargin) - self.col2.set(loc, float(n.val)/float(emargin[n.key])) - num_pairs[0] = loc + 1 - if n.bigger != NULL: - self._add_node(n.bigger, num_pairs, fmargin, emargin) - - - def write_binary(self, char* filename): - cdef FILE* f - f = fopen(filename, "w") - self.f_index.write_handle(f) - self.e_index.write_handle(f) - self.col1.write_handle(f) - self.col2.write_handle(f) - self.write_wordlist(self.id2fword, f) - self.write_wordlist(self.id2eword, f) - fclose(f) - - - cdef write_wordlist(self, wordlist, FILE* f): - cdef int word_len - cdef int num_words - - num_words = len(wordlist) - fwrite(&(num_words), sizeof(int), 1, f) - for word in wordlist: - word_len = len(word) + 1 - fwrite(&(word_len), sizeof(int), 1, f) - fwrite(<char *>word, sizeof(char), word_len, f) - - - cdef read_wordlist(self, word2id, id2word, FILE* f): - cdef int num_words - cdef int word_len - cdef char* word - - fread(&(num_words), sizeof(int), 1, f) - for i from 0 <= i < num_words: - fread(&(word_len), sizeof(int), 1, f) - word = <char*> malloc (word_len * sizeof(char)) - fread(word, sizeof(char), word_len, f) - word2id[word] = len(id2word) - id2word.append(word) - free(word) - - def read_binary(self, char* filename): - cdef FILE* f - f = fopen(filename, "r") - self.f_index.read_handle(f) - self.e_index.read_handle(f) - self.col1.read_handle(f) - self.col2.read_handle(f) - self.read_wordlist(self.fword2id, self.id2fword, f) - self.read_wordlist(self.eword2id, self.id2eword, f) - fclose(f) - - - def get_e_id(self, eword): - if eword not in self.eword2id: - e_id = len(self.id2eword) - self.id2eword.append(eword) - self.eword2id[eword] = e_id - return self.eword2id[eword] - - - def get_f_id(self, fword): - if fword not in self.fword2id: - f_id = len(self.id2fword) - self.id2fword.append(fword) - self.fword2id[fword] = f_id - return self.fword2id[fword] - - - def read_text(self, char* filename): - cdef i, j, w, e_id, f_id, n_f, n_e, N - cdef IntList fcount - - fcount = IntList() - with gzip_or_text(filename) as f: - # first loop merely establishes size of array objects - for line in f: - (fword, eword, score1, score2) = line.split() - f_id = self.get_f_id(fword) - e_id = self.get_e_id(eword) - while f_id >= len(fcount): - fcount.append(0) - fcount.arr[f_id] = fcount.arr[f_id] + 1 - - # Allocate space for dictionary in arrays - N = 0 - n_f = len(fcount) - self.f_index = IntList(initial_len=n_f+1) - for i from 0 <= i < n_f: - self.f_index.arr[i] = N - N = N + fcount.arr[i] - fcount.arr[i] = 0 - self.f_index.arr[n_f] = N - self.e_index = IntList(initial_len=N) - self.col1 = FloatList(initial_len=N) - self.col2 = FloatList(initial_len=N) - - # Re-read file, placing words into buckets - f.seek(0) - for line in f: - (fword, eword, score1, score2) = line.split() - f_id = self.get_f_id(fword) - e_id = self.get_e_id(eword) - index = self.f_index.arr[f_id] + fcount.arr[f_id] - fcount.arr[f_id] = fcount.arr[f_id] + 1 - self.e_index.arr[index] = int(e_id) - self.col1[index] = float(score1) - self.col2[index] = float(score2) - - # Sort buckets by eword - for b from 0 <= b < n_f: - i = self.f_index.arr[b] - j = self.f_index.arr[b+1] - self.qsort(i,j, "") - - - cdef swap(self, int i, int j): - cdef int itmp - cdef float ftmp - - if i == j: - return - - itmp = self.e_index.arr[i] - self.e_index.arr[i] = self.e_index.arr[j] - self.e_index.arr[j] = itmp - - ftmp = self.col1.arr[i] - self.col1.arr[i] = self.col1.arr[j] - self.col1.arr[j] = ftmp - - ftmp = self.col2.arr[i] - self.col2.arr[i] = self.col2.arr[j] - self.col2.arr[j] = ftmp - - - cdef qsort(self, int i, int j, pad): - cdef int pval, p - - if i > j: - raise Exception("Sort error in CLex") - if i == j: #empty interval - return - if i == j-1: # singleton interval - return - - p = (i+j)/2 - pval = self.e_index.arr[p] - self.swap(i, p) - p = i - for k from i+1 <= k < j: - if pval >= self.e_index.arr[k]: - self.swap(p+1, k) - self.swap(p, p+1) - p = p + 1 - self.qsort(i,p, pad+" ") - self.qsort(p+1,j, pad+" ") - - - def write_enhanced(self, char* filename): - with open(filename, "w") as f: - for i in self.f_index: - f.write("%d " % i) - f.write("\n") - for i, s1, s2 in zip(self.e_index, self.col1, self.col2): - f.write("%d %f %f " % (i, s1, s2)) - f.write("\n") - for i, w in enumerate(self.id2fword): - f.write("%d %s " % (i, w)) - f.write("\n") - for i, w in enumerate(self.id2eword): - f.write("%d %s " % (i, w)) - f.write("\n") - - - def get_score(self, fword, eword, col): - cdef e_id, f_id, low, high, midpoint, val - - if eword not in self.eword2id: - return None - if fword not in self.fword2id: - return None - f_id = self.fword2id[fword] - e_id = self.eword2id[eword] - low = self.f_index.arr[f_id] - high = self.f_index.arr[f_id+1] - while high - low > 0: - midpoint = (low+high)/2 - val = self.e_index.arr[midpoint] - if val == e_id: - if col == 0: - return self.col1.arr[midpoint] - if col == 1: - return self.col2.arr[midpoint] - if val > e_id: - high = midpoint - if val < e_id: - low = midpoint + 1 - return None - - - def write_text(self, char* filename): - """Note: does not guarantee writing the dictionary in the original order""" - cdef i, N, e_id, f_id - - with open(filename, "w") as f: - N = len(self.e_index) - f_id = 0 - for i from 0 <= i < N: - while self.f_index.arr[f_id+1] == i: - f_id = f_id + 1 - e_id = self.e_index.arr[i] - score1 = self.col1.arr[i] - score2 = self.col2.arr[i] - f.write("%s %s %.6f %.6f\n" % (self.id2fword[f_id], self.id2eword[e_id], score1, score2)) |