harfbuzz: check in harfbuzz-ng, add gyp define to use it

third_party/harfbuzz-ng/src/gen-arabic-joining-table.py

+#!/usr/bin/python
+
+import sys
+
+header = sys.stdin.readline (), sys.stdin.readline ()
+while sys.stdin.readline ().find ('##################') < 0:
+        pass
+
+
+print "/* == Start of generated table == */"
+print "/*"
+print " * The following table is generated by running:"
+print " *"
+print " *   ./gen-arabic-joining-table.py < ArabicShaping.txt"
+print " *"
+print " * on the ArabicShaping.txt file with the header:"
+print " *"
+for line in header:
+        print " * %s" % (line.strip())
+print " */"
+
+print "static const uint8_t joining_table[] ="
+print "{"
+
+
+min_u = 0x110000
+max_u = 0
+num = 0
+last = -1
+block = ''
+for line in sys.stdin:
+        
+        if line[0] == '#':
+                if line.find (" characters"):
+                        block = line[2:].strip ()
+                continue
+
+        fields = [x.strip () for x in line.split (';')]
+        if len (fields) == 1:
+                continue
+
+        u = int (fields[0], 16)
+        if u == 0x200C or u == 0x200D:
+                continue
+        if u < last:
+                raise Exception ("Input data character not sorted", u)
+        min_u = min (min_u, u)
+        max_u = max (max_u, u)
+        num += 1
+
+        if block:
+                print "\n  /* %s */\n" % block
+                block = ''
+
+        if last != -1:
+                last += 1
+                while last < u:
+                        print "  JOINING_TYPE_X, /* %04X */" % last
+                        last += 1
+        else:
+                last = u
+
+        if fields[3] in ["ALAPH", "DALATH RISH"]:
+                value = "JOINING_GROUP_" + fields[3].replace(' ', '_')
+        else:
+                value = "JOINING_TYPE_" + fields[2]
+        print "  %s, /* %s */" % (value, '; '.join(fields))
+
+print
+print "  JOINING_TYPE_X  /* dummy */"
+print "};"
+print
+
+print "#define JOINING_TABLE_FIRST      0x%04x" % min_u
+print "#define JOINING_TABLE_LAST       0x%04x" % max_u
+print
+
+print "/* == End of generated table == */"
+
+occupancy = num * 100 / (max_u - min_u + 1)
+# Maintain at least 40% occupancy in the table */
+if occupancy < 40:
+        raise Exception ("Table too sparse, please investigate: ", occupancy)