cosmopolitan/net/http/isvalidcookievalue.c
2021-09-04 02:12:12 -07:00

43 lines
2.4 KiB
C

/*-*- 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;
}