49 lines
2.6 KiB
C
49 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 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/bits/safemacros.internal.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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