96 lines
3.1 KiB
C
96 lines
3.1 KiB
C
/****************************************************************************
|
|
* apps/graphics/traveler/tools/libwld/wld_readdecimal.c
|
|
*
|
|
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
|
|
* Author: Gregory Nutt <gnutt@nuttx.org>
|
|
*
|
|
* 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 <stdbool.h>
|
|
#include <stdio.h>
|
|
|
|
#include "wld_utils.h"
|
|
|
|
/*************************************************************************
|
|
* Public Functions
|
|
*************************************************************************/
|
|
|
|
/*************************************************************************
|
|
* Name: wld_read_decimal
|
|
* Description:
|
|
* Read a decimal number from the steam fp
|
|
************************************************************************/
|
|
|
|
int16_t wld_read_decimal(FILE * fp)
|
|
{
|
|
int16_t value = 0;
|
|
bool negative = false;
|
|
int ch;
|
|
|
|
/* Skip over any leading spaces, new lines, or carriage returns (for MSDOS
|
|
* compatibility)
|
|
*/
|
|
|
|
do
|
|
{
|
|
ch = getc(fp);
|
|
}
|
|
while ((ch == ' ') || (ch == '\n') || (ch == '\r'));
|
|
|
|
/* if the first character is '-', then its a negative number */
|
|
|
|
if (ch == '-')
|
|
{
|
|
negative = true;
|
|
ch = getc(fp);
|
|
}
|
|
|
|
/* Now get the unsigned portion of the number */
|
|
|
|
while ((ch >= '0') && (ch <= '9'))
|
|
{
|
|
value = 10 * value + (ch - (int)'0');
|
|
ch = getc(fp);
|
|
}
|
|
|
|
/* Apply the negation, if appropriate */
|
|
|
|
if (negative)
|
|
{
|
|
value = -value;
|
|
}
|
|
|
|
return value;
|
|
}
|