//-----------------------------------------------------------------------------
//
//   errormanager.c
//
//   Purpose: Provides a simple interface for managing runtime error messages.
//
//   Date:       08/25/2017
//
//   Author:     Michael E. Tryby
//               US EPA - ORD/NRMRL
//-----------------------------------------------------------------------------

//#ifdef _WIN32
//#define _CRTDBG_MAP_ALLOC
//#include <stdlib.h>
//#include <crtdbg.h>
//#else
#include <stdlib.h>
//#endif
#include <string.h>

#include "errormanager.h"


error_handle_t *create_error_manager(void (*p_error_message)(int, char*, int))
//
// Purpose: Constructs a new error handle.
//
{
	error_handle_t *error_handle;
	error_handle = (error_handle_t*)calloc(1, sizeof(error_handle_t));

	error_handle->p_msg_lookup = p_error_message;

	return error_handle;
}

void delete_error_manager(error_handle_t *error_handle)
//
// Purpose: Destroys the error handle.
//
{
	free(error_handle);
}

int set_error(error_handle_t *error_handle, int error_code)
//
// Purpose: Sets an error code in the handle.
//
{
	// If the error code is 0 no action is taken and 0 is returned.
	// This is a feature not a bug.
	if (error_code)
		error_handle->error_status = error_code;

	return error_code;
}

int check_error(error_handle_t *error_handle, char **error_message)
//
// Purpose: Returns the error message or NULL.
//
// Note: Caller must free memory allocated by check_error
//
{   int error_code = error_handle->error_status;
	char *temp = NULL;

	if (error_code != 0) {
		temp = (char*) calloc(ERR_MAXMSG + 1, sizeof(char));

		if (temp)
			error_handle->p_msg_lookup(error_code, temp, ERR_MAXMSG);
	}
    *error_message = temp;
	return error_code;
}

void clear_error(error_handle_t *error_handle)
//
// Purpose: Clears the error from the handle.
//
{
	error_handle->error_status = 0;
}