Merged revisions 72054 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r72054 | antoine.pitrou | 2009-04-27 23:53:26 +0200 (lun., 27 avril 2009) | 5 lines

  Issue #1734234: Massively speedup `unicodedata.normalize()` when the
  string is already in normalized form, by performing a quick check beforehand.
  Original patch by Rauli Ruohonen.
........

Tools/unicode/makeunicodedata.py

@@ -36,6 +36,7 @@ UNICODE_DATA = "UnicodeData%s.txt"
 COMPOSITION_EXCLUSIONS = "CompositionExclusions%s.txt"
 EASTASIAN_WIDTH = "EastAsianWidth%s.txt"
 DERIVED_CORE_PROPERTIES = "DerivedCoreProperties%s.txt"
+DERIVEDNORMALIZATION_PROPS = "DerivedNormalizationProps%s.txt"
 
 old_versions = ["3.2.0"]
 
@@ -72,7 +73,8 @@ def maketables(trace=0):
     unicode = UnicodeData(UNICODE_DATA % version,
                           COMPOSITION_EXCLUSIONS % version,
                           EASTASIAN_WIDTH % version,
-                          DERIVED_CORE_PROPERTIES % version)
+                          DERIVED_CORE_PROPERTIES % version,
+                          DERIVEDNORMALIZATION_PROPS % version)
 
     print(len(list(filter(None, unicode.table))), "characters")
 
@@ -94,7 +96,7 @@ def maketables(trace=0):
 
 def makeunicodedata(unicode, trace):
 
-    dummy = (0, 0, 0, 0, 0)
+    dummy = (0, 0, 0, 0, 0, 0)
     table = [dummy]
     cache = {0: dummy}
     index = [0] * len(unicode.chars)
@@ -114,8 +116,10 @@ def makeunicodedata(unicode, trace):
             bidirectional = BIDIRECTIONAL_NAMES.index(record[4])
             mirrored = record[9] == "Y"
             eastasianwidth = EASTASIANWIDTH_NAMES.index(record[15])
+            normalizationquickcheck = record[17]
             item = (
-                category, combining, bidirectional, mirrored, eastasianwidth
+                category, combining, bidirectional, mirrored, eastasianwidth,
+                normalizationquickcheck
                 )
             # add entry to index and item tables
             i = cache.get(item)
@@ -227,7 +231,7 @@ def makeunicodedata(unicode, trace):
     print("/* a list of unique database records */", file=fp)
     print("const _PyUnicode_DatabaseRecord _PyUnicode_Database_Records[] = {", file=fp)
     for item in table:
-        print("    {%d, %d, %d, %d, %d}," % item, file=fp)
+        print("    {%d, %d, %d, %d, %d, %d}," % item, file=fp)
     print("};", file=fp)
     print(file=fp)
 
@@ -717,7 +721,7 @@ class UnicodeData:
     #  derived-props] (17)
 
     def __init__(self, filename, exclusions, eastasianwidth,
-                 derivedprops, expand=1):
+                 derivedprops, derivednormalizationprops=None, expand=1):
         self.changed = []
         file = open(filename)
         table = [None] * 0x110000
@@ -803,6 +807,29 @@ class UnicodeData:
                     # apply to unassigned code points; ignore them
                     table[char][-1].add(p)
 
+        if derivednormalizationprops:
+            quickchecks = [0] * 0x110000 # default is Yes
+            qc_order = 'NFD_QC NFKD_QC NFC_QC NFKC_QC'.split()
+            for s in open(derivednormalizationprops):
+                if '#' in s:
+                    s = s[:s.index('#')]
+                s = [i.strip() for i in s.split(';')]
+                if len(s) < 2 or s[1] not in qc_order:
+                    continue
+                quickcheck = 'MN'.index(s[2]) + 1 # Maybe or No
+                quickcheck_shift = qc_order.index(s[1])*2
+                quickcheck <<= quickcheck_shift
+                if '..' not in s[0]:
+                    first = last = int(s[0], 16)
+                else:
+                    first, last = [int(c, 16) for c in s[0].split('..')]
+                for char in range(first, last+1):
+                    assert not (quickchecks[char]>>quickcheck_shift)&3
+                    quickchecks[char] |= quickcheck
+            for i in range(0, 0x110000):
+                if table[i] is not None:
+                    table[i].append(quickchecks[i])
+
     def uselatin1(self):
         # restrict character range to ISO Latin 1
         self.chars = list(range(256))