remove old suffix array extractor (use the one in python/ instead)

1 files changed, 0 insertions, 322 deletions

diff --git a/sa-extract/csuf.pyx b/sa-extract/csuf.pyx
deleted file mode 100644
index 2f0b1383..00000000
--- a/sa-extract/csuf.pyx
+++ /dev/null
@@ -1,322 +0,0 @@
-# csuf.pyx
-# Defines suffix arrays that can be directly written to/read from disk in binary format
-# Adam Lopez <alopez@cs.umd.edu>
-
-import sys
-import log
-import cdat
-import cintlist
-import monitor
-
-from libc.stdio cimport FILE, fclose, fopen
-
-cdef class SuffixArray:
-
-  def __init__(self, filename, from_binary=False):
-    self.darray = cdat.DataArray()
-    self.sa = cintlist.CIntList()
-    self.ha = cintlist.CIntList()
-    if from_binary:
-      self.read_binary(filename)
-    else:
-      self.read_text(filename)
-
-
-  def __getitem__(self, i):
-    return self.sa.arr[i]
-
-
-  def getSentId(self, i):
-    return self.darray.getSentId(i)
-
-
-  def getSent(self, i):
-    return self.darray.getSent(i)
-
-
-  def getSentPos(self, loc):
-    return self.darray.getSentPos(loc)
-
-  def read_text(self, filename):
-    '''Constructs suffix array using the algorithm
-    of Larsson & Sadahkane (1999)'''
-    cdef int V, N, i, j, h, a_i, n, current_run, skip
-    cdef cintlist.CIntList isa, word_count
-
-    self.darray = cdat.DataArray(filename, from_binary=False, use_sent_id=True)
-    N = len(self.darray)
-    V = len(self.darray.id2word)
-
-    self.sa = cintlist.CIntList(initial_len=N)
-    self.ha = cintlist.CIntList(initial_len=V+1)
-
-    isa = cintlist.CIntList(initial_len=N)
-    word_count = cintlist.CIntList(initial_len=V+1)
-
-    '''Step 1: bucket sort data'''
-    sort_start_time = monitor.cpu()
-    start_time = sort_start_time
-    for i from 0 <= i < N:
-      a_i = self.darray.data.arr[i]
-      word_count.arr[a_i] = word_count.arr[a_i] + 1
-
-    n = 0
-    for i from 0 <= i < V+1:
-      self.ha.arr[i] = n
-      n = n + word_count.arr[i]
-      word_count.arr[i] = 0
-
-    for i from 0 <= i < N:
-      a_i = self.darray.data.arr[i]
-      self.sa.arr[self.ha.arr[a_i] + word_count.arr[a_i]] = i
-      isa.arr[i] = self.ha.arr[a_i + 1] - 1 # bucket pointer is last index in bucket
-      word_count.arr[a_i] = word_count.arr[a_i] + 1
-
-    '''Determine size of initial runs'''
-    current_run = 0
-    for i from 0 <= i < V+1:
-      if i < V and self.ha.arr[i+1] - self.ha.arr[i] == 1:
-        current_run = current_run + 1
-      else:
-        if current_run > 0:
-          self.sa.arr[self.ha.arr[i] - current_run] = -current_run
-          current_run = 0
-
-    sys.stderr.write("  Bucket sort took %f seconds\n" % (monitor.cpu() - sort_start_time))
-
-    '''Step 2: prefix-doubling sort'''
-    h = 1
-    while self.sa.arr[0] != -N:
-      sort_start_time = monitor.cpu()
-      sys.stderr.write("  Refining, sort depth = %d\n" % (h,))
-      i = 0
-      skip = 0
-      while i < N:
-        if self.sa.arr[i] < 0:
-          #sys.stderr.write("Skip from %d to %d\n" % (i, i-self.sa.arr[i]-1))
-          skip = skip + self.sa.arr[i]
-          i = i - self.sa.arr[i]
-        else:
-          if skip < 0:
-            self.sa.arr[i+skip] = skip
-            skip = 0
-          j = isa.arr[self.sa.arr[i]]
-          #sys.stderr.write("Process from %d to %d (%d, %d, %d)\n" % (i, j, self.sa.arr[i], self.darray.data.arr[self.sa.arr[i]], isa.arr[self.sa.arr[i]]))
-          self.q3sort(i, j, h, isa)
-          i = j+1
-      if skip < 0:
-        self.sa.arr[i+skip] = skip
-      h = h * 2
-      sys.stderr.write("  Refinement took %f seconds\n" % (monitor.cpu() - sort_start_time))
-
-    '''Step 3: read off suffix array from inverse suffix array''' 
-    sys.stderr.write("  Finalizing sort...\n")
-    for i from 0 <= i < N:
-      j = isa.arr[i]
-      self.sa.arr[j] = i
-    sys.stderr.write("Suffix array construction took %f seconds\n" % (monitor.cpu() - start_time))
-
-  def q3sort(self, int i, int j, int h, cintlist.CIntList isa, pad=""):
-    '''This is a ternary quicksort. It divides the array into
-    three partitions: items less than the pivot, items equal
-    to pivot, and items greater than pivot.  The first and last
-    of these partitions are then recursively sorted'''
-    cdef int k, midpoint, pval, phead, ptail, tmp
-
-    if j-i < -1:
-      raise Exception("Unexpected condition found in q3sort: sort from %d to %d" % (i,j))
-    if j-i == -1:  # recursive base case -- empty interval
-      return
-    if (j-i == 0):  # recursive base case -- singleton interval
-      isa.arr[self.sa.arr[i]] = i
-      self.sa.arr[i] = -1
-      return 
-
-    # NOTE: choosing the first item as a pivot value resulted in 
-    # stack overflow for some very large buckets.  I think there
-    # is a natural bias towards order due the way the word ids are
-    # assigned; thus this resulted in the range to the left of the 
-    # pivot being nearly empty.   Therefore, choose the middle item.
-    # If the method of assigning word_id's is changed, this method
-    # may need to be reconsidered as well.
-    midpoint = (i+j)/2
-    pval = isa.arr[self.sa.arr[midpoint] + h]
-    if i != midpoint:
-      tmp = self.sa.arr[midpoint]
-      self.sa.arr[midpoint] = self.sa.arr[i]
-      self.sa.arr[i] = tmp
-    phead = i
-    ptail = i
-
-    # find the three partitions.  phead marks the first element
-    # of the middle partition, and ptail marks the last element
-    for k from i+1 <= k < j+1:
-      if isa.arr[self.sa.arr[k] + h] < pval:
-        if k > ptail+1:
-          tmp = self.sa.arr[phead]
-          self.sa.arr[phead] = self.sa.arr[k]
-          self.sa.arr[k] = self.sa.arr[ptail+1]
-          self.sa.arr[ptail+1] = tmp
-        else: # k == ptail+1
-          tmp = self.sa.arr[phead]
-          self.sa.arr[phead] = self.sa.arr[k]
-          self.sa.arr[k] = tmp
-        phead = phead + 1
-        ptail = ptail + 1
-      else:
-        if isa.arr[self.sa.arr[k] + h] == pval:
-          if k > ptail+1:
-            tmp = self.sa.arr[ptail+1]
-            self.sa.arr[ptail+1] = self.sa.arr[k]
-            self.sa.arr[k] = tmp
-          ptail = ptail + 1
-
-    # recursively sort smaller suffixes
-    self.q3sort(i, phead-1, h, isa, pad+"  ")
-
-    # update suffixes with pivot value
-    # corresponds to update_group function in Larsson & Sadakane
-    for k from phead <= k < ptail+1:
-      isa.arr[self.sa.arr[k]] = ptail
-    if phead == ptail:
-      self.sa.arr[phead] = -1
-
-    # recursively sort larger suffixes
-    self.q3sort(ptail+1, j, h, isa, pad+"  ")
-
-
-  def write_text(self, filename):
-    self.darray.write_text(filename)
-
-
-  def read_binary(self, filename):
-    cdef FILE *f
-    cdef bytes bfilename = filename
-    cdef char* cfilename = bfilename
-    f = fopen(cfilename, "r")
-    self.darray.read_handle(f)
-    self.sa.read_handle(f)
-    self.ha.read_handle(f)
-    fclose(f)
-
-
-  def write_binary(self, filename):
-    cdef FILE* f
-    cdef bytes bfilename = filename
-    cdef char* cfilename = bfilename
-    f = fopen(cfilename, "w")
-    self.darray.write_handle(f)
-    self.sa.write_handle(f)
-    self.ha.write_handle(f)
-    fclose(f)
-
-
-  def write_enhanced(self, filename):
-    f = open(filename, "w")
-    self.darray.write_enhanced_handle(f)
-    for a_i in self.sa:
-      f.write("%d " % a_i)
-    f.write("\n")
-    for w_i in self.ha:
-      f.write("%d " % w_i)
-    f.write("\n")
-    f.close()
-
-
-  cdef int __search_high(self, int word_id, int offset, int low, int high):
-    cdef int midpoint
-
-    if low >= high:
-      return high
-    midpoint = (high + low) / 2
-    if self.darray.data.arr[self.sa.arr[midpoint] + offset] == word_id:
-      return self.__search_high(word_id, offset, midpoint+1, high)
-    else:
-      return self.__search_high(word_id, offset, low, midpoint)
-
-
-  cdef int __search_low(self, int word_id, int offset, int low, int high):
-    cdef int midpoint
-
-    if low >= high:
-      return high
-    midpoint = (high + low) / 2
-    if self.darray.data.arr[self.sa.arr[midpoint] + offset] == word_id:
-      return self.__search_low(word_id, offset, low, midpoint)
-    else:
-      return self.__search_low(word_id, offset, midpoint+1, high)
-
-
-  cdef __get_range(self, int word_id, int offset, int low, int high, int midpoint):
-    return (self.__search_low(word_id, offset, low, midpoint),
-        self.__search_high(word_id, offset, midpoint, high))
-
-
-  cdef __lookup_helper(self, int word_id, int offset, int low, int high):
-    cdef int midpoint
-
-    if offset == 0:
-      return (self.ha.arr[word_id], self.ha.arr[word_id+1])
-    if low >= high:
-      return None
-
-    midpoint = (high + low) / 2
-    if self.darray.data.arr[self.sa.arr[midpoint] + offset] == word_id:
-      return self.__get_range(word_id, offset, low, high, midpoint)
-    if self.darray.data.arr[self.sa.arr[midpoint] + offset] > word_id:
-      return self.__lookup_helper(word_id, offset, low, midpoint)
-    else:
-      return self.__lookup_helper(word_id, offset, midpoint+1, high)
-
-
-  def lookup(self, word, int offset, int low, int high):
-    cdef int wordid
-    if low == -1: 
-      low = 0
-    if high == -1:
-      high = len(self.sa)
-    if word in self.darray.word2id:
-      word_id = self.darray.word2id[word]
-      return self.__lookup_helper(word_id, offset, low, high)
-    else:
-      return None
-
-
-
-  def print_sa(self, isa):
-    '''Slow; Use only in case of emergency'''
-    cdef int i, j, k, N
-    cdef cintlist.CIntList tmp_sa
-
-    N = len(self.sa)
-    for i from 0 <= i < N:
-      sys.stderr.write("%2d " % i)
-    sys.stderr.write("\n")
-    for i from 0 <= i < N:
-      sys.stderr.write("%2d " % self.darray.data.arr[i])
-    sys.stderr.write("\n")
-    for i from 0 <= i < N:
-      sys.stderr.write("%2d " % isa.arr[i])
-    sys.stderr.write("\n\n\n")
-
-    # Recover partially sorted array
-    tmp_sa = cintlist.CIntList(initial_len=N)
-    for i from 0 <= i < N:
-      j = isa.arr[i]
-      tmp_sa.arr[j] = i
-    for i from 0 <= i < N:
-      if self.sa.arr[i] > 0:
-        tmp_sa.arr[i] = self.sa.arr[i]
-
-    for i from 0 <= i < N:
-      j = tmp_sa.arr[i]
-      sys.stderr.write("%2d %2d | " % (i, self.sa.arr[i]))
-      for k from j <= k < N:
-        sys.stderr.write("%2d " % self.darray.data.arr[k])
-      sys.stderr.write("\n")
-    sys.stderr.write("\n")
-
-
-
-
-