logging.hpp

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#ifndef ESO_UATOOLS_PROTOCOL_OPEN62541_LOGGING_H_
#define ESO_UATOOLS_PROTOCOL_OPEN62541_LOGGING_H_
 
#include <cstdarg>
#include <cstdio>
#include <iostream>
 
#include <eso/uatools/protocol/base/logger.hpp>
 
#ifdef UA_ENABLE_AMALGAMATION
# include <open62541.h>
#else
# include <open62541/plugin/log.h>
# include <open62541/config.h>
#endif
 
namespace eso::uatools::protocol::opcua {
    static constexpr const char* LOGGER_NAME = "open62541";
}
 
static void CustomOpen62541Log(void* /*log_context*/,
                               UA_LogLevel level,
                               UA_LogCategory /*category*/,
                               const char* msg,
                               va_list args) {
    char buffer[1024] = {};
    auto buffer_size = sizeof(buffer);
    auto ret_val = vsnprintf(buffer, buffer_size, msg, args);
    if (ret_val < 0) {
        std::cerr << "Logging message too big for the allocated buffer\n";
        return;
    }
 
    // Route through the installed uatools logger. Until a logger is
    // installed (HasLogger() == false), drop the message silently —
    // open62541 may emit during early init before main() has had a
    // chance to install a logger, and we don't want that to throw.
    if (!::eso::uatools::protocol::base::HasLogger()) {
        return;
    }
 
    switch (level) {
        case UA_LOGLEVEL_TRACE:   UATTRACE("[open62541] {}", buffer);   break;
        case UA_LOGLEVEL_DEBUG:   UATDEBUG("[open62541] {}", buffer);   break;
        case UA_LOGLEVEL_INFO:    UATINFO("[open62541] {}", buffer);    break;
        case UA_LOGLEVEL_WARNING: UATWARNING("[open62541] {}", buffer); break;
        case UA_LOGLEVEL_ERROR:   UATERROR("[open62541] {}", buffer);   break;
        case UA_LOGLEVEL_FATAL:   UATERROR("[open62541][FATAL] {}", buffer); break;
        default:                  UATINFO("[open62541] {}", buffer);    break;
    }
}
 
#if ((UA_OPEN62541_VER_MAJOR * 100 + UA_OPEN62541_VER_MINOR) * 100 + UA_OPEN62541_VER_PATCH) >= 10400
// TODO this should probably be moved to an unnamed namespace inside
// protocol/open62541/src/open62541.cpp on the next major release (API
// breakage)
[[maybe_unused]] static void CustomOpen62541LogClear(UA_Logger* /*logContext*/) {}
 
[[deprecated("use CustomOpen62541LogClear(UA_Logger*)")]]
#endif
[[maybe_unused]] static void CustomOpen62541LogClear(void* /*logContext*/) {}
 
// TODO this should probably be moved to an unnamed namespace inside
// protocol/open62541/src/open62541.cpp on the next major release (API
// breakage)
[[maybe_unused]] static UA_Logger CustomLogger =
{ CustomOpen62541Log, nullptr, CustomOpen62541LogClear };
 
#endif  // ESO_UATOOLS_PROTOCOL_OPEN62541_LOGGING_H_