mirror of https://github.com/3cky/mbusd.git
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/*
|
|
* OpenMODBUS/TCP to RS-232/485 MODBUS RTU gateway
|
|
*
|
|
* util.h - utility functions
|
|
*
|
|
* Copyright (c) 2002-2023, Victor Antonovich (v.antonovich@gmail.com)
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
*
|
|
* - Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
*
|
|
* - 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.
|
|
*
|
|
* 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 REGENTS 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.
|
|
*/
|
|
|
|
#include "util.h"
|
|
|
|
#include <ctype.h>
|
|
#include <string.h>
|
|
|
|
/**
|
|
* Removes leading whitespace from the string.
|
|
* Parameters: s - the string to be trimmed.
|
|
* Return: a pointer to the first non-whitespace character in string.
|
|
*/
|
|
char *
|
|
util_ltrim(const char *s)
|
|
{
|
|
while (*s && isspace((unsigned char )(*s)))
|
|
s++;
|
|
return (char *) s;
|
|
}
|
|
|
|
/**
|
|
* Removes trailing whitespace from the string.
|
|
* The first trailing whitespace is replaced with a NUL-terminator
|
|
* in the given string.
|
|
* Parameters: s - the string to be trimmed.
|
|
* Return: a pointer to the string.
|
|
*/
|
|
char *
|
|
util_rtrim(char *s)
|
|
{
|
|
char *p = s + strlen(s);
|
|
while (p > s && isspace((unsigned char )(*--p)))
|
|
*p = '\0';
|
|
return s;
|
|
}
|
|
|
|
/**
|
|
* Removes leading and trailing whitespace from the string.
|
|
* The first trailing whitespace is replaced with a NUL-terminator
|
|
* in the given string.
|
|
* Parameters: s - the string to be trimmed.
|
|
* Return: a pointer to the first non-whitespace character in string.
|
|
*/
|
|
char *
|
|
util_trim(char *s)
|
|
{
|
|
if (!strlen(s))
|
|
return s;
|
|
|
|
return util_ltrim(util_rtrim(s));
|
|
} |