[Lldb-commits] [lldb] [lldb-dap] Refactoring IOStream into Transport handler. (PR #130026)

[Pavel Labath via lldb-commits]

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@@ -0,0 +1,58 @@
+//===-- DAPLog.h ----------------------------------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLDB_TOOLS_LLDB_DAP_DAPLOG_H
+#define LLDB_TOOLS_LLDB_DAP_DAPLOG_H
+
+#include "llvm/Support/Error.h"
+#include "llvm/Support/FormatAdapters.h"
+#include "llvm/Support/FormatVariadic.h"
+#include <chrono>
+#include <fstream>
+#include <string>
+
+// Write a message to log, if logging is enabled.
+#define DAP_LOG(log, ...)                                                      \
+  do {                                                                         \
+    ::std::ofstream *log_private = (log);                                      \
+    if (log_private) {                                                         \
+      ::std::chrono::duration<double> now{                                     \
+          ::std::chrono::system_clock::now().time_since_epoch()};              \
+      *log_private << ::llvm::formatv("{0:f9} ", now.count()).str()            \
+                   << ::llvm::formatv(__VA_ARGS__).str() << std::endl;         \
+    }                                                                          \
+  } while (0)
+
+// Write message to log, if error is set. In the log message refer to the error
+// with {0}. Error is cleared regardless of whether logging is enabled.
+#define DAP_LOG_ERROR(log, error, ...)                                         \
+  do {                                                                         \
+    ::std::ofstream *log_private = (log);                                      \
+    ::llvm::Error error_private = (error);                                     \
+    if (log_private && error_private) {                                        \
+      ::std::chrono::duration<double> now{                                     \
+          std::chrono::system_clock::now().time_since_epoch()};                \
+      *log_private << ::llvm::formatv("{0:f9} ", now.count()).str()            \
+                   << ::lldb_dap::FormatError(::std::move(error_private),      \
+                                              __VA_ARGS__)                     \
+                   << std::endl;                                               \
+    } else                                                                     \
+      ::llvm::consumeError(::std::move(error_private));                        \
+  } while (0)
+
+namespace lldb_dap {
+
+template <typename... Args>
+inline auto FormatError(llvm::Error error, const char *format, Args &&...args) {
+  return llvm::formatv(format, llvm::toString(std::move(error)),
+                       std::forward<Args>(args)...)
+      .str();
+}
+} // namespace lldb_dap
+
+#endif
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labath wrote:

missing newline

https://github.com/llvm/llvm-project/pull/130026