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// SPDX-License-Identifier: LGPL-2.1+
/* Copyright (C) 2022 Kent Overstreet */
#include <linux/bitops.h>
#include <linux/kernel.h>
#include <linux/printbuf.h>
#include <linux/pretty-printers.h>
/**
* prt_string_option - Given a list of strings, print out the list and indicate
* which option is selected, with square brackets (sysfs style)
*
* @out: The printbuf to output to
* @list: List of strings to choose from
* @selected: The option to highlight, with square brackets
*/
void prt_string_option(struct printbuf *out,
const char * const list[],
size_t selected)
{
size_t i;
for (i = 0; list[i]; i++) {
if (i)
prt_char(out, ' ');
if (i == selected)
prt_char(out, '[');
prt_str(out, list[i]);
if (i == selected)
prt_char(out, ']');
}
}
EXPORT_SYMBOL(prt_string_option);
/**
* prt_bitflags: Given a bitmap and a list of names for each bit, print out which
* bits are on, comma separated
*
* @out: The printbuf to output to
* @list: List of names for each bit
* @flags: Bits to print
*/
void prt_bitflags(struct printbuf *out,
const char * const list[], u64 flags)
{
unsigned bit, nr = 0;
bool first = true;
while (list[nr])
nr++;
while (flags && (bit = __ffs(flags)) < nr) {
if (!first)
prt_char(out, ',');
first = false;
prt_str(out, list[bit]);
flags ^= 1 << bit;
}
}
EXPORT_SYMBOL(prt_bitflags);
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