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#!/usr/bin/python
#
# Takes an .nroff source file and prints a text file in RFC format.
#
# Usage: rfc-format.py <source file>
import re
import sys
from subprocess import Popen, PIPE
def Readfile(fn):
f = open(fn, "r")
return f.read()
def FixNroffOutput(buf):
p = re.compile(r'(.*)FORMFEED(\[Page\s+\d+\])$')
strip_empty = False
out = ""
for line in buf.split("\n"):
line = line.replace("\xe2\x80\x99", "'")
line = line.replace("\xe2\x80\x90", "-")
for i in range(len(line)):
if ord(line[i]) > 128:
print >>sys.stderr, "Invalid character %d\n" % ord(line[i])
m = p.search(line)
if strip_empty and len(line) == 0:
continue
if m:
out += p.sub(r'\1 \2\n\f', line)
out += "\n"
strip_empty = True
else:
out += "%s\n" % line
strip_empty = False
return out.rstrip("\n")
def Nroff(buf):
p = Popen(["nroff", "-ms"], stdin=PIPE, stdout=PIPE)
out, err = p.communicate(input=buf)
return FixNroffOutput(out)
def FormatTocLine(section, title, page):
line = ""
level = 1
if section:
level = section.count(".")
for i in range(level):
line += " "
if section:
line += "%s " % section
line += "%s " % title
pagenum = "%d" % page
nspace = 72 - len(line) - len(pagenum)
if nspace % 2:
line += " "
for i in range(nspace / 2):
line += ". "
line += "%d\n" % page
return line
def CreateToc(buf):
p1 = re.compile(r'^((\d+\.)+)\s+(.*)$')
p2 = re.compile(r'^(Appendix [A-Z].)\s+(.*)$')
p3 = re.compile(r'\[Page (\d+)\]$')
found = 0
page = 1
out = ""
for line in buf.split("\n"):
m1 = p1.search(line)
m2 = p2.search(line)
m3 = p3.search(line)
if m1:
out += FormatTocLine(m1.group(1), m1.group(3), page)
elif m2:
out += FormatTocLine(m2.group(1), m2.group(2), page)
elif line.startswith("Authors"):
out += FormatTocLine(None, line, page)
elif m3:
page = int(m3.group(1)) + 1
return out
src = Readfile(sys.argv[1])
out = Nroff(src)
toc = CreateToc(out)
src = src.replace("INSERT_TOC_HERE", toc)
print Nroff(src)
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