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#!/usr/bin/env python3
#
# Looks for registration routines in the source files
# and assembles C code to call all the routines.
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
import sys
import re
preamble = """\
/*
* Do not modify this file. Changes will be overwritten.
*
* Generated automatically using \"make-regs.py\".
*/
"""
def gen_prototypes(funcs):
output = ""
for f in funcs:
output += "void {}(void);\n".format(f)
return output
def gen_array(funcs, name):
output = "{}[] = {{\n".format(name)
for f in funcs:
output += " {{ \"{0}\", {0} }},\n".format(f)
output += " { NULL, NULL }\n};\n"
return output
def scan_files(infiles, regs):
for path in infiles:
with open(path, 'r', encoding='utf8') as f:
source = f.read()
for array, regex in regs:
matches = re.findall(regex, source)
array.extend(matches)
def make_dissectors(outfile, infiles):
protos = []
protos_regex = r"void\s+(proto_register_[\w]+)\s*\(\s*void\s*\)\s*{"
handoffs = []
handoffs_regex = r"void\s+(proto_reg_handoff_[\w]+)\s*\(\s*void\s*\)\s*{"
scan_files(infiles, [(protos, protos_regex), (handoffs, handoffs_regex)])
if len(protos) < 1:
sys.exit("No protocol registrations found.")
protos.sort()
handoffs.sort()
output = preamble
output += """\
#include "dissectors.h"
const gulong dissector_reg_proto_count = {0};
const gulong dissector_reg_handoff_count = {1};
""".format(len(protos), len(handoffs))
output += gen_prototypes(protos)
output += "\n"
output += gen_array(protos, "dissector_reg_t dissector_reg_proto")
output += "\n"
output += gen_prototypes(handoffs)
output += "\n"
output += gen_array(handoffs, "dissector_reg_t dissector_reg_handoff")
with open(outfile, "w") as f:
f.write(output)
print("Found {0} registrations and {1} handoffs.".format(len(protos), len(handoffs)))
def make_wtap_modules(outfile, infiles):
wtap_modules = []
wtap_modules_regex = r"void\s+(register_[\w]+)\s*\(\s*void\s*\)\s*{"
scan_files(infiles, [(wtap_modules, wtap_modules_regex)])
if len(wtap_modules) < 1:
sys.exit("No wiretap registrations found.")
wtap_modules.sort()
output = preamble
output += """\
#include "wtap_modules.h"
const guint wtap_module_count = {0};
""".format(len(wtap_modules))
output += gen_prototypes(wtap_modules)
output += "\n"
output += gen_array(wtap_modules, "wtap_module_reg_t wtap_module_reg")
with open(outfile, "w") as f:
f.write(output)
print("Found {0} registrations.".format(len(wtap_modules)))
def make_taps(outfile, infiles):
taps = []
taps_regex = r"void\s+(register_tap_listener_[\w]+)\s*\(\s*void\s*\)\s*{"
scan_files(infiles, [(taps, taps_regex)])
if len(taps) < 1:
sys.exit("No tap registrations found.")
taps.sort()
output = preamble
output += """\
#include "ui/taps.h"
const gulong tap_reg_listener_count = {0};
""".format(len(taps))
output += gen_prototypes(taps)
output += "\n"
output += gen_array(taps, "tap_reg_t tap_reg_listener")
with open(outfile, "w") as f:
f.write(output)
print("Found {0} registrations.".format(len(taps)))
def print_usage():
sys.exit("Usage: {0} <dissectors|taps> <outfile> <infiles...|@filelist>\n".format(sys.argv[0]))
if __name__ == "__main__":
if len(sys.argv) < 4:
print_usage()
mode = sys.argv[1]
outfile = sys.argv[2]
if sys.argv[3].startswith("@"):
with open(sys.argv[3][1:]) as f:
infiles = [l.strip() for l in f.readlines()]
else:
infiles = sys.argv[3:]
if mode == "dissectors":
make_dissectors(outfile, infiles)
elif mode == "wtap_modules":
make_wtap_modules(outfile, infiles)
elif mode == "taps":
make_taps(outfile, infiles)
else:
print_usage()
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