cosmopolitan/net/http/isvalidcookievalue.c

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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi
Copyright 2021 Justine Alexandra Roberts Tunney
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 "libc/str/str.h"
#include "net/http/http.h"
static inline bool IsCookieOctet(unsigned char i) {
return i > 0x20 && i < 0x7F && i != ',' && i != ';' && i != '\\' &&
i != ' ' && i != '"';
}
/**
* Returns true if string is a valid cookie value
* (any ASCII excluding control char, whitespace,
* double quotes, comma, semicolon, and backslash).
*
* @param n if -1 implies strlen
*/
bool IsValidCookieValue(const char *s, size_t n) {
size_t i;
if (n == -1) n = s ? strlen(s) : 0;
for (i = 0; i < n; ++i) {
if (!IsCookieOctet(s[i])) {
return false;
}
}
return true;
}