48 lines
2.5 KiB
C
48 lines
2.5 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 2020 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/bits/safemacros.h"
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#include "libc/str/str.h"
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#include "libc/x/x.h"
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/**
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* Joins paths, e.g.
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*
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* "a" + "b" → "a/b"
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* "a/" + "b" → "a/b"
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* "a" + "b/" → "a/b/"
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* "a" + "/b" → "/b"
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* "." + "b" → "b"
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* "" + "b" → "b"
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*
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* @return newly allocated string of resulting path
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*/
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char *xjoinpaths(const char *path, const char *other) {
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if (!*other) {
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return xstrdup(path);
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} else if (!*path) {
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return xstrdup(other);
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} else if (startswith(other, "/") || !strcmp(path, ".")) {
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return xstrdup(other);
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} else if (endswith(path, "/")) {
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return xstrcat(path, other);
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} else {
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return xstrcat(path, '/', other);
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}
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}
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