event_reader_macros.h

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/**
  @file
 
  @brief Contains macros used by libbinlogevents deserialization.
*/
 
#ifndef MYSQL_BINLOG_EVENT_EVENT_READER_MACROS_H
#define MYSQL_BINLOG_EVENT_EVENT_READER_MACROS_H
 
/// @addtogroup GroupLibsMysqlBinlogEvent
/// @{
 
namespace mysql::binlog::event {
 
/*
  Macro to be sourced by all event constructors to skip trying to deserialize a
  buffer that already found errors.
*/
#define READER_TRY_INITIALIZATION \
  if (!header()->get_is_valid()) BAPI_VOID_RETURN
 
/*
  Macro to be sourced by all event constructors to skip trying to deserialize a
  buffer once finding errors.
*/
#define READER_CATCH_ERROR \
  event_reader_footer:     \
  header()->set_is_valid(READER_CALL(has_error) == false)
 
/*
  Macro to be used to wrap calls to Event_reader functions that does not
  return values (void) or when the returned value is not needed.
*/
#define READER_CALL(func, ...) reader().func(__VA_ARGS__)
 
/*
  Same as READER_CALL, but checking if Event_reader entered error state.
*/
#define READER_TRY_CALL(func, ...) \
  READER_CALL(func, __VA_ARGS__);  \
  if (reader().get_error()) goto event_reader_footer
 
/*
  Macro to be used to wrap calls to Event_reader functions that return values.
*/
#define READER_SET(var, func, ...)                     \
  BAPI_PRINT("debug", ("Event_reader::SET %s", #var)); \
  var = reader().func(__VA_ARGS__)
 
/*
  Same as READER_SET, but checking if Event_reader entered error state.
*/
#define READER_TRY_SET(var, func, ...) \
  READER_SET(var, func, __VA_ARGS__);  \
  if (reader().get_error()) goto event_reader_footer
 
/*
  Macro to be used when event deserialization find illegal values or conditions.
*/
#define READER_THROW(message)    \
  {                              \
    reader().set_error(message); \
    goto event_reader_footer;    \
  }
 
/*
  Macro to assert that the cursor is in a specified position.
*/
#define READER_ASSERT_POSITION(pos) BAPI_ASSERT(READER_CALL(position) == pos)
 
}  // end namespace mysql::binlog::event
/**
  @} (GroupLibsMysqlBinlogEvent)
*/
#endif  // MYSQL_BINLOG_EVENT_EVENT_READER_MACROS_H