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parseentities.py

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 shared-testcase

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parseentities.py

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#!/usr/bin/env python3

""" Utility for parsing HTML entity definitions available from:

http://www.w3.org/ as e.g.

http://www.w3.org/TR/REC-html40/HTMLlat1.ent

Input is read from stdin, output is written to stdout in form of a

Python snippet defining a dictionary "entitydefs" mapping literal

entity name to character or numeric entity.

Marc-Andre Lemburg, mal@lemburg.com, 1999.

Use as you like. NO WARRANTIES.

"""

import re,sys

entityRE = re.compile(r'<!ENTITY +(\w+) +CDATA +"([^"]+)" +-- +((?:.|\n)+?) *-->')

def parse(text,pos=0,endpos=None):

pos = 0

if endpos is None:

endpos = len(text)

d = {}

while 1:

m = entityRE.search(text,pos,endpos)

if not m:

break

name,charcode,comment = m.groups()

d[name] = charcode,comment

pos = m.end()

return d

def writefile(f,defs):

f.write("entitydefs = {\n")

items = sorted(defs.items())

for name, (charcode,comment) in items:

if charcode[:2] == '&#':

code = int(charcode[2:-1])

if code < 256:

charcode = r"'\%o'" % code

else:

charcode = repr(charcode)

else:

charcode = repr(charcode)

comment = ' '.join(comment.split())

f.write(" '%s':\t%s, \t# %s\n" % (name,charcode,comment))

f.write('\n}\n')

if __name__ == '__main__':

if len(sys.argv) > 1:

with open(sys.argv[1]) as infile:

text = infile.read()

else:

text = sys.stdin.read()

defs = parse(text)

if len(sys.argv) > 2:

with open(sys.argv[2],'w') as outfile:

writefile(outfile, defs)

else:

writefile(sys.stdout, defs)