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/**
* @file rtems/print.h
*
* @brief User print interface to the bspIO print plug in.
*
* This include file defines the user interface to kernel print methods.
*/
/*
* Copyright (c) 2016 Chris Johns <chrisj@rtems.org>
* All rights reserved.
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifndef _RTEMS_PRINTER_H
#define _RTEMS_PRINTER_H
#include <rtems/print.h>
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif
/**
* @addtogroup XXX
*
* @{
*/
/**
* @defgroup RTEMSPrintSupport
*/
/**
* Type definition for function which can be plugged in to certain reporting
* routines to redirect the output.
*
* Use the RTEMS Print interface to call these functions. Do not directly use
* them.
*
* If the user provides their own printer, then they may redirect those reports
* as they see fit.
*/
typedef int (*rtems_print_printer)(void *, const char *format, va_list ap);
/**
* Type definition for the printer structure used to access the kernel print
* support.
*/
struct rtems_printer {
void *context;
rtems_print_printer printer;
};
/**
* @brief check if the printer is valid.
*
* @param[in] printer Pointer to the printer structure.
*
* @return true The printer is valid else false is returned.
*/
static inline bool rtems_print_printer_valid(const rtems_printer *printer)
{
return printer != NULL && printer->printer != NULL;
}
/**
* @brief Initializes the rtems_printer struct to empty.
*
* An empty printer prints nothing. You can use this to implement an enable and
* disable type print implementation.
*
* @param[in] printer Pointer to the printer structure.
*/
static inline void rtems_print_printer_empty(rtems_printer *printer)
{
printer->context = NULL;
printer->printer = NULL;
}
/**
* @brief Initializes the rtems_printer struct to printk
*
* The printer will output to the kernel printk support.
*
* @param[in] printer Pointer to the printer structure.
*/
void rtems_print_printer_printk(rtems_printer *printer);
/**
* @brief Initializes the rtems_printer struct to printf
*
* The printer will output to the libc printf support.
*
* @param[in] printer Pointer to the printer structure.
*/
extern void rtems_print_printer_printf(rtems_printer *printer);
/**
* @brief Initializes the rtems_printer struct to a fprintf device.
*
* The printer will output to the libc fprintf file provided.
*
* @param[in] printer Pointer to the printer structure.
*/
extern void rtems_print_printer_fprintf(rtems_printer *printer, FILE *file);
/** @} */
#ifdef __cplusplus
}
#endif
#endif /* _RTEMS_PRINTER_H */
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