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#!/usr/bin/env python
#
# Looks for registration routines in the protocol dissectors,
# and assembles C code to call all the routines.
#
# This is a Python version of the make-reg-dotc shell script.
# Running the shell script on Win32 is very very slow because of
# all the process-launching that goes on --- multiple greps and
# seds for each input file. I wrote this python version so that
# less processes would have to be started.
#
# $Id$
import os
import sys
import re
#
# The first argument is the directory in which the source files live.
#
srcdir = sys.argv[1]
#
# The second argument is either "plugin" or "dissectors"; if it's
# "plugin", we build a plugin.c for a plugin, and if it's
# "dissectors", we build a register.c for libwireshark.
#
registertype = sys.argv[2]
if registertype == "plugin":
tmp_filename = "plugin.c-tmp"
final_filename = "plugin.c"
elif registertype == "dissectors":
tmp_filename = "register.c-tmp"
final_filename = "register.c"
else:
print "Unknown output type '%s'" % registertype
sys.exit(1)
#
# All subsequent arguments are the files to scan.
#
files = sys.argv[3:]
# Create the proper list of filenames
filenames = []
for file in files:
if os.path.isfile(file):
filenames.append(file)
else:
filenames.append("%s/%s" % (srcdir, file))
# Look through all files, applying the regex to each line.
# If the pattern matches, save the "symbol" section to the
# appropriate array.
proto_reg = []
handoff_reg = []
# For those that don't know Python, r"" indicates a raw string,
# devoid of Python escapes.
proto_regex0 = r"^(?P<symbol>proto_register_[_A-Za-z0-9]+)\s*\([^;]+$"
proto_regex1 = r"void\s+(?P<symbol>proto_register_[_A-Za-z0-9]+)\s*\([^;]+$"
handoff_regex0 = r"^(?P<symbol>proto_reg_handoff_[_A-Za-z0-9]+)\s*\([^;]+$"
handoff_regex1 = r"void\s+(?P<symbol>proto_reg_handoff_[_A-Za-z0-9]+)\s*\([^;]+$"
# This table drives the pattern-matching and symbol-harvesting
patterns = [
( proto_reg, re.compile(proto_regex0) ),
( proto_reg, re.compile(proto_regex1) ),
( handoff_reg, re.compile(handoff_regex0) ),
( handoff_reg, re.compile(handoff_regex1) ),
]
# Grep
for filename in filenames:
file = open(filename)
# print "Searching %s" % (filename)
for line in file.readlines():
for action in patterns:
regex = action[1]
match = regex.search(line)
if match:
symbol = match.group("symbol")
list = action[0]
list.append(symbol)
file.close()
# Sort the lists to make them pretty
proto_reg.sort()
handoff_reg.sort()
reg_code = open(tmp_filename, "w")
reg_code.write("/* Do not modify this file. */\n")
reg_code.write("/* It is created automatically by the Makefile. */\n")
# Make the routine to register all protocols
if registertype == "plugin":
reg_code.write("""
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <gmodule.h>
#include "moduleinfo.h"
#ifndef ENABLE_STATIC
G_MODULE_EXPORT const gchar version[] = VERSION;
/* Start the functions we need for the plugin stuff */
G_MODULE_EXPORT void
plugin_register (void)
{
""");
else:
reg_code.write("""
#include "register.h"
void
register_all_protocols(void)
{
""");
for symbol in proto_reg:
line = " {extern void %s (void); %s ();}\n" % (symbol, symbol)
reg_code.write(line)
reg_code.write("}\n")
# Make the routine to register all protocol handoffs
if registertype == "plugin":
reg_code.write("""
G_MODULE_EXPORT void
plugin_reg_handoff(void)
{
""");
else:
reg_code.write("""
void
register_all_protocol_handoffs(void)
{
""");
for symbol in handoff_reg:
line = " {extern void %s (void); %s ();}\n" % (symbol, symbol)
reg_code.write(line)
reg_code.write("}\n")
if registertype == "plugin":
reg_code.write("#endif\n");
# Close the file
reg_code.close()
# Remove the old final_file if it exists.
try:
os.stat(final_filename)
os.remove(final_filename)
except OSError:
pass
# Move from tmp file to final file
os.rename(tmp_filename, final_filename)
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