blob: 7ec91df3274198883d34d6e9d14150588faf4dfc [file] [log] [blame]
#!/usr/bin/env python3
#
# Copyright (c) 2022 Meta
#
# SPDX-License-Identifier: Apache-2.0
import argparse
import os
import re
def front_matter(sys_nerr):
return f'''
/*
* This file generated by {__file__}
*/
#include <errno.h>
#include <stdint.h>
#include <string.h>
#include <zephyr/sys/util.h>
#define sys_nerr {sys_nerr}'''
def gen_strerror_table(input, output):
with open(input, 'r') as inf:
highest_errno = 0
symbols = []
msgs = {}
for line in inf.readlines():
# Select items of the form below (note: ERRNO is numeric)
# #define SYMBOL ERRNO /**< MSG */
pat = r'^#define[\s]+(E[A-Z_]*)[\s]+([1-9][0-9]*)[\s]+/\*\*<[\s]+(.*)[\s]+\*/[\s]*$'
match = re.match(pat, line)
if not match:
continue
symbol = match[1]
errno = int(match[2])
msg = match[3]
symbols.append(symbol)
msgs[symbol] = msg
highest_errno = max(int(errno), highest_errno)
try:
os.makedirs(os.path.dirname(output))
except BaseException:
# directory already present
pass
with open(output, 'w') as outf:
print(front_matter(highest_errno + 1), file=outf)
# Generate string table
print(
f'static const char *const sys_errlist[sys_nerr] = {{', file=outf)
print('[0] = "Success",', file=outf)
for symbol in symbols:
print(f'[{symbol}] = "{msgs[symbol]}",', file=outf)
print('};', file=outf)
# Generate string lengths (includes trailing '\0')
print(
f'static const uint8_t sys_errlen[sys_nerr] = {{', file=outf)
print('[0] = 8,', file=outf)
for symbol in symbols:
print(f'[{symbol}] = {len(msgs[symbol]) + 1},', file=outf)
print('};', file=outf)
def parse_args():
parser = argparse.ArgumentParser(allow_abbrev=False)
parser.add_argument(
'-i',
'--input',
dest='input',
required=True,
help='input file (e.g. lib/libc/minimal/include/errno.h)')
parser.add_argument(
'-o',
'--output',
dest='output',
required=True,
help='output file (e.g. build/zephyr/misc/generated/libc/minimal/strerror_table.h)')
args = parser.parse_args()
return args
def main():
args = parse_args()
gen_strerror_table(args.input, args.output)
if __name__ == '__main__':
main()