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https://github.com/jart/cosmopolitan.git
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4a59210008
This change improves the way internal APIs are being hidden behind the `COSMO` define. The cosmo.h header will take care of defining that, so that a separate define statement isn't needed. This change also does a lot more to define which APIs are standard, and which belong to Cosmo.
89 lines
4.1 KiB
C
89 lines
4.1 KiB
C
/*-*- mode:c;indent-tabs-mode:t;c-basic-offset:8;tab-width:8;coding:utf-8 -*-│
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│vi: set et ft=c ts=8 tw=8 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright (c) 1990, 1993 │
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│ The Regents of the University of California. All rights reserved. │
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│ │
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│ Redistribution and use in source and binary forms, with or without │
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│ modification, are permitted provided that the following conditions │
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│ are met: │
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│ 1. Redistributions of source code must retain the above copyright │
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│ notice, this list of conditions and the following disclaimer. │
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│ 2. Redistributions in binary form must reproduce the above copyright │
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│ notice, this list of conditions and the following disclaimer in the │
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│ documentation and/or other materials provided with the distribution. │
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│ 3. Neither the name of the University nor the names of its contributors │
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│ may be used to endorse or promote products derived from this software │
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│ without specific prior written permission. │
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│ │
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│ THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND │
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│ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE │
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│ IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE │
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│ ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE │
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│ FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL │
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│ DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS │
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│ OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) │
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│ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT │
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│ LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY │
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│ OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF │
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│ SUCH DAMAGE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/str/str.h"
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#include "third_party/getopt/getopt.h"
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// clang-format off
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/*
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* The SVID interface to getsubopt provides no way of figuring out which
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* part of the suboptions list wasn't matched. This makes error messages
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* tricky... The extern variable suboptarg is a pointer to the token
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* which didn't match.
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*/
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char *suboptarg;
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int
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getsubopt(char **optionp, char * const *tokens, char **valuep)
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{
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int cnt;
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char *p;
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suboptarg = *valuep = NULL;
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/* skip leading white-space, commas */
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for (p = *optionp; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
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if (!*p) {
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*optionp = p;
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return(-1);
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}
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/* save the start of the token, and skip the rest of the token. */
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for (suboptarg = p;
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*++p && *p != ',' && *p != '=' && *p != ' ' && *p != '\t';);
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if (*p) {
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/*
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* If there's an equals sign, set the value pointer, and
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* skip over the value part of the token. Terminate the
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* token.
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*/
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if (*p == '=') {
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*p = '\0';
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for (*valuep = ++p;
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*p && *p != ',' && *p != ' ' && *p != '\t'; ++p);
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if (*p)
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*p++ = '\0';
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} else
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*p++ = '\0';
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/* Skip any whitespace or commas after this token. */
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for (; *p && (*p == ',' || *p == ' ' || *p == '\t'); ++p);
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}
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/* set optionp for next round. */
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*optionp = p;
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for (cnt = 0; *tokens; ++tokens, ++cnt)
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if (!strcmp(suboptarg, *tokens))
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return(cnt);
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return(-1);
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}
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