transmission/libtransmission/error.cc

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// This file Copyright © 2013-2023 Mnemosyne LLC.
// It may be used under GPLv2 (SPDX: GPL-2.0-only), GPLv3 (SPDX: GPL-3.0-only),
// or any future license endorsed by Mnemosyne LLC.
// License text can be found in the licenses/ folder.
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#include <algorithm>
#include <string_view>
#include <fmt/format.h>
#include "transmission.h"
#include "error.h"
#include "tr-assert.h"
#include "tr-macros.h"
#include "utils.h"
namespace
{
[[nodiscard]] char* tr_strvdup(std::string_view in)
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{
auto const n = std::size(in);
auto* const ret = new char[n + 1];
std::copy(std::begin(in), std::end(in), ret);
ret[n] = '\0';
return ret;
}
} // namespace
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void tr_error_free(tr_error* error)
{
if (error == nullptr)
{
return;
}
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delete[] error->message;
delete error;
}
void tr_error_set(tr_error** error, int code, std::string_view message)
{
if (error == nullptr)
{
return;
}
TR_ASSERT(*error == nullptr);
*error = new tr_error{ code, tr_strvdup(message) };
}
void tr_error_set_from_errno(tr_error** error, int errnum)
{
tr_error_set(error, errnum, tr_strerror(errnum));
}
void tr_error_propagate(tr_error** new_error, tr_error** old_error)
{
TR_ASSERT(old_error != nullptr);
TR_ASSERT(*old_error != nullptr);
if (new_error != nullptr)
{
TR_ASSERT(*new_error == nullptr);
*new_error = *old_error;
*old_error = nullptr;
}
else
{
tr_error_clear(old_error);
}
}
void tr_error_clear(tr_error** error)
{
if (error == nullptr)
{
return;
}
tr_error_free(*error);
*error = nullptr;
}
void tr_error_prefix(tr_error** error, char const* prefix)
{
TR_ASSERT(prefix != nullptr);
if (error == nullptr || *error == nullptr)
{
return;
}
auto* err = *error;
auto* const new_message = tr_strvdup(fmt::format(FMT_STRING("{:s}{:s}"), prefix, err->message));
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delete[] err->message;
err->message = new_message;
}