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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/ArrayUtils.h"
#include "mozilla/ErrorNames.h"
#include "nsString.h"
#include "prerror.h"
namespace {
struct ErrorEntry
{
nsresult value;
const char * name;
};
#undef ERROR
#define ERROR(key, val) {key, #key}
const ErrorEntry errors[] = {
#include "ErrorList.h"
};
#undef ERROR
} // unnamed namespace
namespace mozilla {
void
GetErrorName(nsresult rv, nsACString& name)
{
for (size_t i = 0; i < ArrayLength(errors); ++i) {
if (errors[i].value == rv) {
name.AssignASCII(errors[i].name);
return;
}
}
bool isSecurityError = NS_ERROR_GET_MODULE(rv) == NS_ERROR_MODULE_SECURITY;
// NS_ERROR_MODULE_SECURITY is the only module that is "allowed" to
// synthesize nsresult error codes that are not listed in ErrorList.h. (The
// NS_ERROR_MODULE_SECURITY error codes are synthesized from NSPR error
// codes.)
MOZ_ASSERT(isSecurityError);
name.AssignASCII(NS_SUCCEEDED(rv) ? "NS_ERROR_GENERATE_SUCCESS("
: "NS_ERROR_GENERATE_FAILURE(");
if (isSecurityError) {
name.AppendASCII("NS_ERROR_MODULE_SECURITY");
} else {
// This should never happen given the assertion above, so we don't bother
// trying to print a symbolic name for the module here.
name.AppendInt(NS_ERROR_GET_MODULE(rv));
}
name.AppendASCII(", ");
const char * nsprName = nullptr;
if (isSecurityError) {
// Invert the logic from NSSErrorsService::GetXPCOMFromNSSError
PRErrorCode nsprCode
= -1 * static_cast<PRErrorCode>(NS_ERROR_GET_CODE(rv));
nsprName = PR_ErrorToName(nsprCode);
// All NSPR error codes defined by NSPR or NSS should have a name mapping.
MOZ_ASSERT(nsprName);
}
if (nsprName) {
name.AppendASCII(nsprName);
} else {
name.AppendInt(NS_ERROR_GET_CODE(rv));
}
name.AppendASCII(")");
}
} // namespace mozilla
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