1// Copyright (c) 2020-present The Bitcoin Core developers
2// Distributed under the MIT software license, see the accompanying
3// file COPYING or http://www.opensource.org/licenses/mit-license.php.
4
5#include <bitcoin-build-config.h> // IWYU pragma: keep
6
7#include <util/syserror.h>
8
9#include <tinyformat.h>
10
11#include <cstring>
12#include <string>
13
14#if defined(WIN32)
15#include <windows.h>
16#endif
17
18std::string SysErrorString(int err)
19{
20    char buf[1024];
21    /* Too bad there are three incompatible implementations of the
22     * thread-safe strerror. */
23    const char *s = nullptr;
24#ifdef WIN32
25    if (strerror_s(buf, sizeof(buf), err) == 0) s = buf;
26#else
27#ifdef STRERROR_R_CHAR_P /* GNU variant can return a pointer outside the passed buffer */
28    s = strerror_r(err, buf, sizeof(buf));
29#else /* POSIX variant always returns message in buffer */
30    if (strerror_r(err, buf, sizeof(buf)) == 0) s = buf;
31#endif
32#endif
33    if (s != nullptr) {
34        return strprintf("%s (%d)", s, err);
35    } else {
36        return strprintf("Unknown error (%d)", err);
37    }
38}
39
40#if defined(WIN32)
41std::string Win32ErrorString(int err)
42{
43    char buf[256];
44    buf[0] = 0;
45    if (FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS | FORMAT_MESSAGE_MAX_WIDTH_MASK,
46                       nullptr, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
47                       buf, ARRAYSIZE(buf), nullptr)) {
48        return strprintf("%s (%d)", buf, err);
49    } else {
50        return strprintf("Unknown error (%d)", err);
51    }
52}
53#endif
54