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Move string trim functions to util.c
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/* | ||
* 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. | ||
*/ | ||
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#include "util.h" | ||
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#include <ctype.h> | ||
#include <string.h> | ||
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/** | ||
* 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; | ||
} | ||
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/** | ||
* 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; | ||
} | ||
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/** | ||
* 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; | ||
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return util_ltrim(util_rtrim(s)); | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,39 @@ | ||
/* | ||
* 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. | ||
*/ | ||
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#ifndef _UTIL_H | ||
#define _UTIL_H | ||
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char *util_ltrim(const char *s); | ||
char *util_rtrim(char *s); | ||
char *util_trim(char *s); | ||
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#endif /* _UTIL_H */ |