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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab ft=cpp
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2023 Red Hat, Inc
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#pragma once
#include <array>
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <ctype.h>
#include <errno.h>
static inline void buf_to_hex(const unsigned char* const buf,
const size_t len,
char* const str)
{
str[0] = '\0';
for (size_t i = 0; i < len; i++) {
::sprintf(&str[i*2], "%02x", static_cast<int>(buf[i]));
}
}
template<size_t N> static inline std::array<char, N * 2 + 1>
buf_to_hex(const std::array<unsigned char, N>& buf)
{
static_assert(N > 0, "The input array must be at least one element long");
std::array<char, N * 2 + 1> hex_dest;
buf_to_hex(buf.data(), N, hex_dest.data());
return hex_dest;
}
static inline int hexdigit(char c)
{
if (c >= '0' && c <= '9')
return (c - '0');
c = toupper(c);
if (c >= 'A' && c <= 'F')
return c - 'A' + 0xa;
return -EINVAL;
}
static inline int hex_to_buf(const char *hex, char *buf, int len)
{
int i = 0;
const char *p = hex;
while (*p) {
if (i >= len)
return -EINVAL;
buf[i] = 0;
int d = hexdigit(*p);
if (d < 0)
return d;
buf[i] = d << 4;
p++;
if (!*p)
return -EINVAL;
d = hexdigit(*p);
if (d < 0)
return d;
buf[i] += d;
i++;
p++;
}
return i;
} /* hex_to_buf */
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