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55 lines
1.5 KiB
55 lines
1.5 KiB
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#pragma once
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#include <stdio.h>
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#include <stdarg.h>
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#include <string>
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class Result {
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public:
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static Result success() {
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return Result(true);
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}
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// Construct a result indicating an error.
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static Result error(std::string message) {
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return Result(message);
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}
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static Result error(const char* format, ...) {
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char buffer[1024];
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va_list args;
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va_start(args, format);
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vsnprintf(buffer, sizeof(buffer), format, args);
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va_end(args);
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buffer[sizeof(buffer) - 1] = '\0';
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return Result(std::string(buffer));
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}
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bool isSuccess() const { return mSuccess; }
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bool operator!() const { return !mSuccess; }
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const char* c_str() const { return mMessage.c_str(); }
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private:
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explicit Result(bool success) : mSuccess(success) { }
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explicit Result(std::string message)
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: mMessage(message), mSuccess(false) {
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}
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std::string mMessage;
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bool mSuccess;
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};
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