rtems: Add rtems_print_printer_fprintf_putc()

Update #3170.
Update #3199.

cpukit/include/rtems/printer.h

@@ -74,7 +74,7 @@ static inline bool rtems_print_printer_valid(const rtems_printer *printer)
 }
 
 /**
- * @brief Initializes the rtems_printer struct to empty.
+ * @brief Initializes the printer to print nothing.
  *
  * An empty printer prints nothing. You can use this to implement an enable and
  * disable type print implementation.
@@ -88,31 +88,34 @@ static inline void rtems_print_printer_empty(rtems_printer *printer)
 }
 
 /**
- * @brief Initializes the rtems_printer struct to printk
- *
- * The printer will output to the kernel printk support.
+ * @brief Initializes the printer to print via printk().
  *
  * @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.
+ * @brief Initializes the printer to print via printf().
  *
  * @param[in] printer Pointer to the printer structure.
  */
-extern void rtems_print_printer_printf(rtems_printer *printer);
+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.
+ * @brief Initializes the printer to print via fprintf() using the specified
+ * file stream.
  *
  * @param[in] printer Pointer to the printer structure.
  */
-extern void rtems_print_printer_fprintf(rtems_printer *printer, FILE *file);
+void rtems_print_printer_fprintf(rtems_printer *printer, FILE *file);
+
+/**
+ * @brief Initializes the printer to print via fprintf() using an unbuffered
+ * FILE stream with output through rtems_putc().
+ *
+ * @param[in] printer Pointer to the printer structure.
+ */
+void rtems_print_printer_fprintf_putc(rtems_printer *printer);
 
 typedef struct {
   rtems_id                     task;

cpukit/libcsupport/Makefile.am

@@ -139,6 +139,7 @@ libcsupport_a_SOURCES = src/gxx_wrappers.c src/getchark.c src/printk.c \
     $(BSD_LIBC_C_FILES) $(BASE_FS_C_FILES) $(MALLOC_C_FILES) \
     $(ERROR_C_FILES) $(ASSOCIATION_C_FILES)
 libcsupport_a_SOURCES += src/printertask.c
+libcsupport_a_SOURCES += src/printerfprintfputc.c
 
 libcsupport_a_SOURCES += $(LIBC_GLUE_C_FILES) $(PASSWORD_GROUP_C_FILES) \
     $(TERMINAL_IDENTIFICATION_C_FILES) $(SYSTEM_CALL_C_FILES) \

cpukit/libcsupport/src/printerfprintfputc.c

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2017 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * 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.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <rtems/printer.h>
+#include <rtems/bspIo.h>
+
+#include <pthread.h>
+
+static pthread_once_t fprintf_putc_once = PTHREAD_ONCE_INIT;
+
+static FILE fprintf_putc_file;
+
+static _READ_WRITE_RETURN_TYPE fprintf_putc_write(
+  struct _reent            *ptr,
+  void                     *cookie,
+  char const               *buf,
+  _READ_WRITE_BUFSIZE_TYPE  n
+)
+{
+  _READ_WRITE_RETURN_TYPE i;
+  _READ_WRITE_RETURN_TYPE m;
+
+  m = (_READ_WRITE_RETURN_TYPE) n;
+  for (i = 0; i < m; ++i) {
+    rtems_putc(buf[i]);
+  }
+
+  return m;
+}
+
+static void fprintf_putc_init(void)
+{
+  FILE *f;
+
+  f = &fprintf_putc_file;
+  f->_flags = __SWR | __SNBF;
+  f->_cookie = f;
+  f->_write = fprintf_putc_write;
+  __lock_init_recursive(f->_lock);
+}
+
+static int fprintf_putc_printer(void *context, const char *fmt, va_list ap)
+{
+  return vfprintf(context, fmt, ap);
+}
+
+void rtems_print_printer_fprintf_putc(rtems_printer *printer)
+{
+  pthread_once(&fprintf_putc_once, fprintf_putc_init);
+  printer->context = &fprintf_putc_file;
+  printer->printer = fprintf_putc_printer;
+}