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/* Perl inspired chomp() implementation.
*
* Copyright (c) 2014-2015 Joachim Nilsson <troglobit@gmail.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <errno.h>
#include <string.h>
/**
* chomp - Perl like chomp function, chop off last char(s) if newline.
* @str: String to chomp
*
* This function is like Perl chomp, but it's set to chop of all
* trailing newlines.
*
* Returns:
* If @str is a valid pointer this function returns @str, otherwise
* @errno is set to %EINVAL and this function returns %NULL.
*/
char *chomp(char *str)
{
char *p;
if (!str || strlen(str) < 1) {
errno = EINVAL;
return NULL;
}
p = str + strlen(str) - 1;
while (*p == '\n')
*p-- = 0;
return str;
}
#ifdef UNITTEST
#include <stdio.h>
int main(void)
{
int i; char t[][16] = { "hej\ndej", "Slime\n\n\\n", "Tripple\n\n\n", "" };
for (i = 0; t[i][0]; i++) printf("[%02d]: '%s'\n", i, chomp(t[i])); return 0;
}
#endif
/**
* Local Variables:
* compile-command: "make V=1 -f chomp.mk"
* version-control: t
* indent-tabs-mode: t
* c-file-style: "linux"
* End:
*/
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