102 lines
3.4 KiB
C
102 lines
3.4 KiB
C
/****************************************************************************
|
|
* lib_strtol.c
|
|
*
|
|
* Copyright (C) 2007 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 <stdlib.h>
|
|
#include "lib_internal.h"
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: strtol
|
|
*
|
|
* Description:
|
|
* The strtol() function converts the initial part of the string in
|
|
* nptr to a long integer value according to the given base, which must be
|
|
* between 2 and 36 inclusive, or be the special value 0.
|
|
*
|
|
* Warning: does not check for integer overflow!
|
|
*
|
|
****************************************************************************/
|
|
|
|
long strtol(const char *nptr, char **endptr, int base)
|
|
{
|
|
unsigned long accum = 0;
|
|
boolean negate = FALSE;
|
|
|
|
if (nptr)
|
|
{
|
|
/* Skip leading spaces */
|
|
|
|
lib_skipspace(&nptr);
|
|
|
|
/* Check for leading + or - */
|
|
|
|
if (*nptr == '-')
|
|
{
|
|
negate = TRUE;
|
|
nptr++;
|
|
}
|
|
else if (*nptr == '+')
|
|
{
|
|
nptr++;
|
|
}
|
|
|
|
/* Get the unsigned value */
|
|
|
|
accum = strtoul(nptr, endptr, base);
|
|
|
|
/* Correct the sign of the result */
|
|
|
|
if (negate)
|
|
{
|
|
return -(long)accum;
|
|
}
|
|
}
|
|
return (long)accum;
|
|
}
|
|
|