wireshark/tools/rdps.py
Guy Harris 3a7a3a9e40 rdps: generate big text arrays and one fwrite() call.
Rather than generating a bunch of individual fprintf() calls, one per
line of the preamble and finale, generate two static const char arrays
with the preamble and finale text, and have the routines just write them
out with an fwrite().
2023-07-20 01:27:38 -07:00

143 lines
3.1 KiB
Python
Executable file

#!/usr/bin/env python3
#
# rdps.py
#
# Wireshark - Network traffic analyzer
# By Gerald Combs <gerald@wireshark.org>
# Copyright 1998 Gerald Combs
#
# SPDX-License-Identifier: GPL-2.0-or-later
#
'''\
takes the file listed as the first argument and creates the file listed
as the second argument. It takes a PostScript file and creates a C source
with 2 functions:
print_ps_preamble()
print_ps_finale()
Ported to Python from rdps.c.
'''
import sys
import os.path
def ps_clean_string(raw_str):
ps_str = ''
for c in raw_str:
if c == '\\':
ps_str += '\\\\'
elif c == '\n':
ps_str += '\\n'
else:
ps_str += c
return ps_str
def start_code(fd, name):
fd.write("static const char ps_%s[] =\n" % name)
def write_code(fd, raw_str):
ps_str = ps_clean_string(raw_str)
fd.write("\t\"%s\"\n" % ps_str)
def end_code(fd, name):
fd.write(";\n")
fd.write("\n")
fd.write("void print_ps_%s(FILE *fd) {\n" % name)
fd.write("\tfwrite(ps_%s, sizeof ps_%s - 1, 1, fd);\n" % ( name, name ) )
fd.write("}\n\n\n")
def exit_err(msg=None, *param):
if msg is not None:
sys.stderr.write(msg % param)
sys.exit(1)
# Globals
STATE_NULL = 'null'
STATE_PREAMBLE = 'preamble'
STATE_FINALE = 'finale'
def main():
state = STATE_NULL
if len(sys.argv) != 3:
exit_err("%s: input_file output_file\n", __file__)
input = open(sys.argv[1], 'r')
output = open(sys.argv[2], 'w')
script_name = os.path.split(__file__)[-1]
output.write('''\
/* DO NOT EDIT
*
* Created by %s.
*
* ps.c
* Definitions for generating PostScript(R) packet output.
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include <stdio.h>
#include "ps.h"
''' % script_name)
for line in input:
#line = line.rstrip()
if state == STATE_NULL:
if line.startswith("% ---- wireshark preamble start ---- %"):
state = STATE_PREAMBLE
start_code(output, "preamble")
continue
elif line.startswith("% ---- wireshark finale start ---- %"):
state = STATE_FINALE
start_code(output, "finale")
continue
elif state == STATE_PREAMBLE:
if line.startswith("% ---- wireshark preamble end ---- %"):
state = STATE_NULL
end_code(output, "preamble")
continue
else:
write_code(output, line)
elif state == STATE_FINALE:
if line.startswith("% ---- wireshark finale end ---- %"):
state = STATE_NULL
end_code(output, "finale")
continue
else:
write_code(output, line)
else:
exit_err("NO MATCH:%s", line)
sys.exit(0)
if __name__ == "__main__":
main()
#
# Editor modelines - https://www.wireshark.org/tools/modelines.html
#
# Local variables:
# c-basic-offset: 4
# indent-tabs-mode: nil
# End:
#
# vi: set shiftwidth=4 expandtab:
# :indentSize=4:noTabs=true:
#