mirror of
https://github.com/jart/cosmopolitan.git
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1a96de6eda
Locally modified to get nameservers from Windows Registry when `\etc\resolv.conf` isn't defined.
65 lines
3.6 KiB
C
65 lines
3.6 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│ vi: set noet ft=c ts=8 tw=8 fenc=utf-8 :vi │
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╚──────────────────────────────────────────────────────────────────────────────╝
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│ │
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│ Musl Libc │
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│ Copyright © 2005-2014 Rich Felker, et al. │
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│ │
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│ Permission is hereby granted, free of charge, to any person obtaining │
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│ a copy of this software and associated documentation files (the │
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│ "Software"), to deal in the Software without restriction, including │
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│ without limitation the rights to use, copy, modify, merge, publish, │
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│ distribute, sublicense, and/or sell copies of the Software, and to │
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│ permit persons to whom the Software is furnished to do so, subject to │
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│ the following conditions: │
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│ │
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│ The above copyright notice and this permission notice shall be │
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│ included in all copies or substantial portions of the Software. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
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│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
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│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
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│ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY │
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│ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, │
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│ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE │
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│ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │
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│ │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "third_party/musl/resolv.internal.h"
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asm(".ident\t\"\\n\\n\
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Musl libc (MIT License)\\n\
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Copyright 2005-2014 Rich Felker, et. al.\"");
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asm(".include \"libc/disclaimer.inc\"");
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int __dn_expand(const unsigned char *base, const unsigned char *end, const unsigned char *src, char *dest, int space)
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{
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const unsigned char *p = src;
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char *dend, *dbegin = dest;
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int len = -1, i, j;
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if (p==end || space <= 0) return -1;
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dend = dest + (space > 254 ? 254 : space);
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/* detect reference loop using an iteration counter */
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for (i=0; i < end-base; i+=2) {
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/* loop invariants: p<end, dest<dend */
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if (*p & 0xc0) {
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if (p+1==end) return -1;
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j = ((p[0] & 0x3f) << 8) | p[1];
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if (len < 0) len = p+2-src;
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if (j >= end-base) return -1;
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p = base+j;
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} else if (*p) {
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if (dest != dbegin) *dest++ = '.';
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j = *p++;
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if (j >= end-p || j >= dend-dest) return -1;
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while (j--) *dest++ = *p++;
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} else {
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*dest = 0;
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if (len < 0) len = p+1-src;
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return len;
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}
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}
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return -1;
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}
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__weak_reference(__dn_expand, dn_expand);
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