nuttx-apps/nshlib/nsh_printf.c

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/****************************************************************************
* apps/nshlib/nsh_printf.c
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <ctype.h>
#include <libgen.h>
#include <errno.h>
#include "nsh.h"
#include "nsh_console.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: cmd_printf
****************************************************************************/
#ifndef CONFIG_NSH_DISABLE_PRINTF
int cmd_printf(FAR struct nsh_vtbl_s *vtbl, int argc, char **argv)
{
FAR char *fmt;
char ch;
uint32_t value;
int len;
int i;
/* parse each argument, detecting the right action to take
* case it doesn't starts with a format then just print it
*/
for (i = 1; i < argc; i++)
{
fmt = argv[i];
/* Is it really a FORMAT ? */
if (fmt[0] == '\\')
{
fmt++;
ch = fmt[0];
switch (ch)
{
case 'x':
fmt++;
value = strtoul(fmt, NULL, 16);
len = strnlen(fmt, 10);
if (len >= 7)
{
nsh_output(vtbl, "%c%c%c%c", value & 0xff,
(value & 0xff00) >> 8,
(value & 0xff0000) >> 16,
(value & 0xff000000) >> 24);
}
else if (len >= 3)
{
nsh_output(vtbl, "%c%c", value & 0xff,
(value & 0xff00) >> 8);
}
else if (len >= 1)
{
nsh_output(vtbl, "%c", value & 0xff);
}
break;
case 'n':
nsh_output(vtbl, "\n");
break;
case 'r':
nsh_output(vtbl, "\r");
break;
case 't':
nsh_output(vtbl, "\t");
break;
default:
break;
}
}
else
{
nsh_output(vtbl, "%s", argv[i]);
}
}
return OK;
}
#endif