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// SPDX-License-Identifier: LGPL-2.1+
/* Copyright (C) 2022 Kent Overstreet */
#include <linux/kernel.h>
#include <linux/printbuf.h>
/**
* pr_hex_bytes - Print a string of hex bytes, with optional separator
*
* @out: The printbuf to output to
* @addr: Buffer to print
* @nr: Number of bytes to print
* @separator: Optional separator character between each byte
*/
void pr_hex_bytes(struct printbuf *out, const u8 *addr,
unsigned nr, unsigned separator)
{
unsigned i;
for (i = 0; i < nr; ++i) {
if (separator && i)
pr_char(out, separator);
pr_hex_byte(out, addr[i]);
}
printbuf_nul_terminate(out);
}
EXPORT_SYMBOL(pr_hex_bytes);
/**
* pr_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 pr_string_option(struct printbuf *out,
const char * const list[],
size_t selected)
{
size_t i;
for (i = 0; list[i]; i++) {
if (i)
pr_char(out, ' ');
if (i == selected)
pr_char(out, '[');
pr_str(out, list[i]);
if (i == selected)
pr_char(out, ']');
}
}
EXPORT_SYMBOL(pr_string_option);
/**
* pr_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 pr_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)
pr_buf(out, ",");
first = false;
pr_str(out, list[bit]);
flags ^= 1 << bit;
}
}
EXPORT_SYMBOL(pr_bitflags);
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