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/* tinyproxy - A fast light-weight HTTP proxy

* Copyright (C) 2002 Robert James Kaes <rjkaes@users.sourceforge.net>

*

* 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 of the License, 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.

*

* You should have received a copy of the GNU General Public License along

* with this program; if not, write to the Free Software Foundation, Inc.,

* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

*/

/* 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.

*/

#include "main.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;

}