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- /*
- * Copyright 2017-present Facebook, Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
- #pragma once
- /*
- * C-style printf-like macros for the logging library.
- *
- * These are defined in their own separate header file to discourage their use
- * in new code. These macros make it somewhat easier to convert existing code
- * using printf()-like statements to the logging library. However, new code
- * should generally prefer to use one of the other macro forms instead
- * (simple argument concatenation, folly::format based, or iostream-like).
- *
- * These use a "C" suffix to the macro name since these use C-style format
- * syntax. (The "F" suffix is used for folly:format()-style.)
- */
- #include <folly/logging/Logger.h>
- #include <folly/logging/xlog.h>
- namespace folly {
- std::string loggingFormatPrintf(
- FOLLY_PRINTF_FORMAT const char* format,
- ...) noexcept FOLLY_PRINTF_FORMAT_ATTR(1, 2);
- } // namespace folly
- /**
- * Log a message to the specified logger using a printf-style format string.
- */
- #define FB_LOGC(logger, level, fmt, ...) \
- FB_LOG(logger, level, ::folly::loggingFormatPrintf(fmt, ##__VA_ARGS__))
- /**
- * Log a message to the file's default log category using a printf-style format
- * string.
- */
- #define XLOGC(level, fmt, ...) \
- XLOG_IMPL( \
- ::folly::LogLevel::level, \
- ::folly::LogStreamProcessor::APPEND, \
- ::folly::loggingFormatPrintf(fmt, ##__VA_ARGS__))
- /**
- * Log a message using a printf-style format string if and only if the
- * specified condition predicate evaluates to true. Note that the condition
- * is *only* evaluated if the log-level check passes.
- */
- #define XLOGC_IF(level, cond, fmt, ...) \
- XLOG_IF_IMPL( \
- ::folly::LogLevel::level, \
- cond, \
- ::folly::LogStreamProcessor::APPEND, \
- ::folly::loggingFormatPrintf(fmt, ##__VA_ARGS__))
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