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394d998315
At least in neovim, `│vi:` is not recognized as a modeline because it has no preceding whitespace. After fixing this, opening a file yields an error because `net` is not an option. (`noet`, however, is.)
67 lines
2.9 KiB
C
67 lines
2.9 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2021 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/str/str.h"
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#include "libc/str/thompike.h"
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#include "net/http/http.h"
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/**
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* Returns true if path doesn't contain "." or ".." segments.
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*
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* @param size if -1 implies strlen
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* @see IsAcceptablePath()
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*/
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bool IsReasonablePath(const char *data, size_t size) {
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const char *p, *e;
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int x, y, z, a, b, i, n;
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if (size == -1) size = data ? strlen(data) : 0;
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z = '/';
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y = '/';
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x = '/';
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p = data;
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e = p + size;
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while (p < e) {
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x = *p++ & 0xff;
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if (x >= 0300) {
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a = ThomPikeByte(x);
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n = ThomPikeLen(x) - 1;
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if (p + n <= e) {
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for (i = 0;;) {
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b = p[i] & 0xff;
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if (!ThomPikeCont(b)) break;
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a = ThomPikeMerge(a, b);
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if (++i == n) {
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x = a;
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p += i;
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break;
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}
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}
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}
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}
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if (x == '\\') {
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x = '/';
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}
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if (z == '/' && y == '.' && x == '/') return false;
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if (z == '/' && y == '.' && x == '.') return false;
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z = y;
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y = x;
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}
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if (y == '/' && x == '.') return false;
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if (z == '/' && y == '.' && x == '.') return false;
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return true;
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}
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