C Runtime Library¶

The EWTS C runtime library provides logging support for C-based hydrologic modules running either within ngen or as standalone applications.

Typical use¶

A C module defines its EWTS module ID and uses the runtime logger API:

#include "ewts/module_constants.h"
#define EWTS_ID EWTS_ID_CFE
#include "ewts/logger.h"

int Initialize(void)
{
    EwtsInit(EWTS_ID, true);
    LOG(INFO, "Initializing CFE");
    return 0;
}

When running under ngen¶

Initialize the module logger before the first log message, typically from the module's BMI Initialize entry point. This ensures that the correct module ID and per-module configuration are applied from the beginning of execution.

Common log levels¶

Level	Value
NOTSET	0
DEBUG	10
PERFORM	15
INFO	20
WARNING	30
SEVERE	40
FATAL	50

Developer reference¶

For implementation details, macros, and runtime-specific notes, see:

• runtime/c/README.md