tests: add printflags function to libtests

* tests/printflags.c: New file.
* tests/tests.h (printflags): New prototype.
* tests/Makefile.am (libtests_a_SOURCES): Add it.

diff --git a/tests/Makefile.am b/tests/Makefile.am
index d23d0d8a5c7374383566bfc6b8322c26753b7e6f..bd170fddd9a360bec9c159e7c0cbccb78f78ca19 100644 (file)
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -49,6 +49,7 @@ libtests_a_SOURCES = \
        inode_of_sockfd.c \
        overflowuid.c \
        print_quoted_string.c \
+       printflags.c \
        tail_alloc.c \
        tests.h \
        tprintf.c \

diff --git a/tests/printflags.c b/tests/printflags.c
new file mode 100644 (file)
index 0000000..badc85d
--- /dev/null
+++ b/tests/printflags.c
@@ -0,0 +1,78 @@
+/*
+ * 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) 2005-2016 Dmitry V. Levin <ldv@altlinux.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#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;
+}

diff --git a/tests/tests.h b/tests/tests.h
index 1d14f43fd957ebe602c7acd78af840b50553f1ff..5604efc34ca52313e08834ce2e141767619ef098 100644 (file)
--- a/tests/tests.h
+++ b/tests/tests.h
@@ -87,9 +87,13 @@ void check_overflowuid(const int);
 /* Check whether given gid matches kernel overflowgid. */
 void check_overflowgid(const int);
 
-/* Translate errno to its name */
+/* Translate errno to its name. */
 const char *errno2name(void);
 
+/* Print flags in symbolic form according to xlat table. */
+struct xlat;
+int printflags(const struct xlat *, const unsigned long long, const char *);
+
 # define ARRAY_SIZE(arg) ((unsigned int) (sizeof(arg) / sizeof((arg)[0])))
 # define LENGTH_OF(arg) ((unsigned int) sizeof(arg) - 1)