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64 lines
2.3 KiB
C++
64 lines
2.3 KiB
C++
/**********************************************************************
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* File: icuerrorcode.h
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* Description: Wrapper class for UErrorCode, with conversion operators for
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* direct use in ICU C and C++ APIs.
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* Author: Fredrik Roubert
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* Created: Thu July 4 2013
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*
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* Features:
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* - The constructor initializes the internal UErrorCode to U_ZERO_ERROR,
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* removing one common source of errors.
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* - Same use in C APIs taking a UErrorCode* (pointer) and C++ taking
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* UErrorCode& (reference), via conversion operators.
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* - Automatic checking for success when it goes out of scope. On failure,
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* the destructor will log an error message and exit.
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*
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* Most of ICU will handle errors gracefully and provide sensible fallbacks.
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* Using IcuErrorCode, it is therefore possible to write very compact code
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* that does sensible things on failure and provides logging for debugging.
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*
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* Example:
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* IcuErrorCode icuerrorcode;
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* return collator.compareUTF8(a, b, icuerrorcode) == UCOL_EQUAL;
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*
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* (C) Copyright 2013, Google Inc.
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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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* http://www.apache.org/licenses/LICENSE-2.0
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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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**********************************************************************/
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#ifndef TESSERACT_CCUTIL_ICUERRORCODE_H_
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#define TESSERACT_CCUTIL_ICUERRORCODE_H_
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#include <cstdlib> // for exit
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#include "tprintf.h"
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#include "unicode/errorcode.h" // From libicu
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namespace tesseract {
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class IcuErrorCode : public icu::ErrorCode {
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public:
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IcuErrorCode() {}
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virtual ~IcuErrorCode();
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protected:
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virtual void handleFailure() const {
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tprintf("ICU ERROR: %s\n", errorName());
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exit(errorCode);
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}
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private:
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// Disallow implicit copying of object.
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IcuErrorCode(const IcuErrorCode&);
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void operator=(const IcuErrorCode&);
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};
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} // namespace tesseract
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#endif // TESSERACT_CCUTIL_ICUERRORCODE_H_
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