e639434a89
Our "sstring_view" is an historic alias for the standard std::string_view. The patch changes the last remaining random uses of this old alias across our source directory to the standard type name. After this patch, there are no more uses of the "sstring_view" alias. It will be removed in the following patch. Refs #4062. Signed-off-by: Nadav Har'El <nyh@scylladb.com>
73 lines
1.8 KiB
C++
73 lines
1.8 KiB
C++
/*
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* Copyright (C) 2014-present ScyllaDB
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*/
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/*
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* SPDX-License-Identifier: AGPL-3.0-or-later
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*/
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#include "bytes.hh"
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#include <fmt/ostream.h>
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#include <seastar/core/format.hh>
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static inline int8_t hex_to_int(unsigned char c) {
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switch (c) {
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case '0': return 0;
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case '1': return 1;
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case '2': return 2;
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case '3': return 3;
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case '4': return 4;
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case '5': return 5;
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case '6': return 6;
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case '7': return 7;
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case '8': return 8;
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case '9': return 9;
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case 'a': case 'A': return 10;
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case 'b': case 'B': return 11;
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case 'c': case 'C': return 12;
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case 'd': case 'D': return 13;
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case 'e': case 'E': return 14;
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case 'f': case 'F': return 15;
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default:
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return -1;
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}
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}
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bytes from_hex(std::string_view s) {
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if (s.length() % 2 == 1) {
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throw std::invalid_argument("An hex string representing bytes must have an even length");
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}
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bytes out{bytes::initialized_later(), s.length() / 2};
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unsigned end = out.size();
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for (unsigned i = 0; i != end; i++) {
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auto half_byte1 = hex_to_int(s[i * 2]);
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auto half_byte2 = hex_to_int(s[i * 2 + 1]);
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if (half_byte1 == -1 || half_byte2 == -1) {
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throw std::invalid_argument(fmt::format("Non-hex characters in {}", s));
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}
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out[i] = (half_byte1 << 4) | half_byte2;
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}
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return out;
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}
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sstring to_hex(bytes_view b) {
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return fmt::to_string(fmt_hex(b));
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}
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sstring to_hex(const bytes& b) {
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return to_hex(bytes_view(b));
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}
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sstring to_hex(const bytes_opt& b) {
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return !b ? "null" : to_hex(*b);
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}
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namespace std {
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std::ostream& operator<<(std::ostream& os, const bytes_view& b) {
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fmt::print(os, "{}", fmt_hex(b));
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return os;
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}
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}
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