613d405fd4
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1883 42af7a65-404d-4744-a932-0658087f49c3
104 lines
3.4 KiB
C
104 lines
3.4 KiB
C
/****************************************************************************
|
|
* lib/lib_isbasedigit.c
|
|
*
|
|
* Copyright (C) 2007, 2009 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
* 3. Neither the name NuttX nor the names of its contributors may be
|
|
* used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGE.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
#include <sys/types.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include "lib_internal.h"
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: lib_isbasedigit
|
|
*
|
|
* Description:
|
|
* Given an ASCII character, ch, and a base (1-36) do two
|
|
* things: 1) Determine if ch is a valid charcter, and 2)
|
|
* convert ch to its binary value.
|
|
*
|
|
****************************************************************************/
|
|
|
|
boolean lib_isbasedigit(int ch, int base, int *value)
|
|
{
|
|
boolean ret = FALSE;
|
|
int tmp = 0;
|
|
|
|
if (base <= 10)
|
|
{
|
|
if (ch >= '0' && ch <= base + '0' - 1)
|
|
{
|
|
tmp = ch - '0';
|
|
ret = TRUE;
|
|
}
|
|
}
|
|
else if (base <= 36)
|
|
{
|
|
if (ch >= '0' && ch <= '9')
|
|
{
|
|
tmp = ch - '0';
|
|
ret =TRUE;
|
|
}
|
|
else if (ch >= 'a' && ch <= 'a' + base - 11)
|
|
{
|
|
tmp = ch - 'a' + 10;
|
|
ret = TRUE;
|
|
}
|
|
else if (ch >= 'A' && ch <= 'A' + base - 11)
|
|
{
|
|
tmp = ch - 'A' + 10;
|
|
ret = TRUE;
|
|
}
|
|
}
|
|
|
|
if (value)
|
|
{
|
|
*value = tmp;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
|