mirror of
https://github.com/jart/cosmopolitan.git
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53 lines
2.6 KiB
C
53 lines
2.6 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net 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/x/x.h"
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#include "net/http/escape.h"
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/**
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* Escapes URL component using generic table.
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*
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* This function is agnostic to the underlying charset.
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* Always using UTF-8 is a good idea.
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*
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* @see EscapeUrlParam
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* @see EscapeUrlFragment
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* @see EscapeUrlPathSegment
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*/
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struct EscapeResult EscapeUrl(const char *data, size_t size,
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const char xlat[hasatleast 256]) {
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int c;
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char *p;
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size_t i;
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struct EscapeResult r;
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p = r.data = xmalloc(size * 6 + 1);
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for (i = 0; i < size; ++i) {
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if (!xlat[(c = data[i] & 0xff)]) {
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*p++ = c;
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} else {
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p[0] = '%';
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p[1] = "0123456789ABCDEF"[(c & 0xF0) >> 4];
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p[2] = "0123456789ABCDEF"[(c & 0x0F) >> 0];
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p += 3;
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}
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}
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r.size = p - r.data;
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r.data = xrealloc(r.data, r.size + 1);
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r.data[r.size] = '\0';
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return r;
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}
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