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SSLproxy/src/util.c

66 lines
2.3 KiB
C

/*-
* SSLsplit - transparent SSL/TLS interception
* https://www.roe.ch/SSLsplit
*
* Copyright (c) 2009-2019, Daniel Roethlisberger <daniel@roe.ch>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. 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 HOLDER 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 COPYRIGHT HOLDER 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.
*/
#include <string.h>
/*
* Various utility functions.
*/
/*
* Returns a pointer to the first non-whitespace character in s.
* Only space and tab characters are considered whitespace.
*/
char *
util_skipws(const char *s)
{
return (char*) s + strspn(s, " \t");
}
/*
* Returns the length of the first word in a given memory area.
* Memory area may not be null-terminated, hence we cannot use string
* manipulation functions.
*/
size_t
util_get_first_word_len(char *mem, size_t size)
{
char *end;
// @attention The detection order of ws chars is important: space, tab, cr, and nl
if ((end = memchr(mem, ' ', size)) ||
(end = memchr(mem, '\t', size)) ||
(end = memchr(mem, '\r', size)) ||
(end = memchr(mem, '\n', size)) ||
(end = memchr(mem, '\0', size))) {
return (size_t)(end - mem);
}
return size;
}
/* vim: set noet ft=c: */