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libite

    1: /* Perl inspired chomp() implementation.
    2:  *
    3:  * Copyright (c) 2014-2015  Joachim Nilsson <troglobit@gmail.com>
    4:  *
    5:  * Permission to use, copy, modify, and/or distribute this software for any
    6:  * purpose with or without fee is hereby granted, provided that the above
    7:  * copyright notice and this permission notice appear in all copies.
    8:  *
    9:  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   10:  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   11:  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   12:  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   13:  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   14:  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   15:  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   16:  */
   17: 
   18: #include <errno.h>
   19: #include <string.h>
   20: 
   21: /**
   22:  * chomp - Perl like chomp function, chop off last char(s) if newline.
   23:  * @str: String to chomp
   24:  *
   25:  * This function is like Perl chomp, but it's set to chop of all
   26:  * trailing newlines.
   27:  *
   28:  * Returns:
   29:  * If @str is a valid pointer this function returns @str, otherwise
   30:  * @errno is set to %EINVAL and this function returns %NULL.
   31:  */
   32: char *chomp(char *str)
   33: {
   34: 	char *p;
   35: 
   36: 	if (!str || strlen(str) < 1) {
   37: 		errno = EINVAL;
   38: 		return NULL;
   39: 	}
   40: 
   41: 	p = str + strlen(str) - 1;
   42:         while (*p == '\n')
   43: 		*p-- = 0;
   44: 
   45: 	return str;
   46: }
   47: 
   48: #ifdef UNITTEST
   49: #include <stdio.h>
   50: int main(void)
   51: {
   52: 	int i; char t[][16] = { "hej\ndej", "Slime\n\n\\n", "Tripple\n\n\n", "" };
   53: 	for (i = 0; t[i][0]; i++) printf("[%02d]: '%s'\n", i, chomp(t[i])); return 0;
   54: }
   55: #endif
   56: 
   57: /**
   58:  * Local Variables:
   59:  *  compile-command: "make V=1 -f chomp.mk"
   60:  *  version-control: t
   61:  *  indent-tabs-mode: t
   62:  *  c-file-style: "linux"
   63:  * End:
   64:  */