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/* $Id: text.c,v 1.3 2003-03-13 05:20:06 rjkaes Exp $
*
* The functions included here are useful for text manipulation. They
* replace or augment the standard C string library. These functions
* are either safer replacements, or they provide services not included
* with the standard C string library.
*
* Copyright (C) 2002 Robert James Kaes (rjkaes@flarenet.com)
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2, or (at your option) any
* later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*/
#include "tinyproxy.h"
#include "text.h"
#ifndef HAVE_STRLCPY
/*
* Function API taken from OpenBSD. Like strncpy(), but does not 0 fill the
* buffer, and always NULL terminates the buffer. size is the size of the
* destination buffer.
*/
size_t
strlcpy(char *dst, const char *src, size_t size)
{
size_t len = strlen(src);
size_t ret = len;
if (len >= size)
len = size - 1;
memcpy(dst, src, len);
dst[len] = '\0';
return ret;
}
#endif
#ifndef HAVE_STRLCAT
/*
* Function API taken from OpenBSD. Like strncat(), but does not 0 fill the
* buffer, and always NULL terminates the buffer. size is the length of the
* buffer, which should be one more than the maximum resulting string
* length.
*/
size_t
strlcat(char *dst, const char *src, size_t size)
{
size_t len1 = strlen(dst);
size_t len2 = strlen(src);
size_t ret = len1 + len2;
if (len1 + len2 >= size)
len2 = size - len1 - 1;
if (len2 > 0) {
memcpy(dst + len1, src, len2);
dst[len1 + len2] = '\0';
}
return ret;
}
#endif
/*
* Removes any new-line or carriage-return characters from the end of the
* string. This function is named after the same function in Perl.
* "length" should be the number of characters in the buffer, not including
* the trailing NULL.
*
* Returns the number of characters removed from the end of the string. A
* negative return value indicates an error.
*/
ssize_t
chomp(char *buffer, size_t length)
{
size_t chars;
assert(buffer != NULL);
assert(length > 0);
/* Make sure the arguments are valid */
if (buffer == NULL) return -EFAULT;
if (length < 1) return -ERANGE;
chars = 0;
--length;
while (buffer[length] == '\r' || buffer[length] == '\n') {
buffer[length] = '\0';
chars++;
/* Stop once we get to zero to prevent wrap-around */
if (length-- == 0) break;
}
return chars;
}
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