strace/tests/printflags.c

59 lines
1.1 KiB
C

/*
* Copyright (c) 1991, 1992 Paul Kranenburg <pk@cs.few.eur.nl>
* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-1999 Wichert Akkerman <wichert@cistron.nl>
* Copyright (c) 2005-2018 Dmitry V. Levin <ldv@altlinux.org>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "xlat.h"
#include <stdio.h>
int
printflags(const struct xlat *xlat, unsigned long long flags,
const char *const dflt)
{
if (flags == 0 && xlat->val == 0 && xlat->str) {
fputs(xlat->str, stdout);
return 1;
}
int n;
char sep = 0;
for (n = 0; xlat->str; xlat++) {
if (xlat->val && (flags & xlat->val) == xlat->val) {
if (sep)
putc(sep, stdout);
else
sep = '|';
fputs(xlat->str, stdout);
flags &= ~xlat->val;
n++;
}
}
if (n) {
if (flags) {
if (sep)
putc(sep, stdout);
printf("%#llx", flags);
n++;
}
} else {
if (flags) {
printf("%#llx", flags);
if (dflt)
printf(" /* %s */", dflt);
} else {
if (dflt)
putc('0', stdout);
}
}
return n;
}