ce49d99c2f
Since we switched from autotools to Meson in commit
94592c1406, we don't need to include
`config.h` early to properly enable large file support. Meson passes
the required macros on the compiler command line instead of defining
them in `config.h`.
This means we can include `config.h` at any time, whenever we want to
check its macros, and there are no ordering constraints.
103 lines
2.3 KiB
C++
103 lines
2.3 KiB
C++
/*
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* Copyright 2003-2018 The Music Player Daemon Project
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* http://www.musicpd.org
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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; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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 along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "ArchiveLookup.hxx"
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#include "ArchiveDomain.hxx"
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#include "Log.hxx"
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#include <string.h>
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#include <sys/stat.h>
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#include <errno.h>
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gcc_pure
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static char *
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FindSlash(char *p, size_t i) noexcept
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{
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for (; i > 0; --i)
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if (p[i] == '/')
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return p + i;
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return nullptr;
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}
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gcc_pure
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static const char *
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FindSuffix(const char *p, const char *i) noexcept
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{
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for (; i > p; --i) {
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if (*i == '.')
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return i + 1;
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}
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return nullptr;
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}
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bool
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archive_lookup(char *pathname, const char **archive,
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const char **inpath, const char **suffix)
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{
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size_t idx = strlen(pathname);
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char *slash = nullptr;
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while (true) {
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//try to stat if its real directory
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struct stat st_info;
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if (stat(pathname, &st_info) == -1) {
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if (errno != ENOTDIR) {
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FormatErrno(archive_domain,
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"Failed to stat %s", pathname);
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return false;
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}
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} else {
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//is something found ins original path (is not an archive)
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if (slash == nullptr)
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return false;
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//its a file ?
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if (S_ISREG(st_info.st_mode)) {
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//so the upper should be file
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*archive = pathname;
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*inpath = slash + 1;
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//try to get suffix
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*suffix = FindSuffix(pathname, slash - 1);
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return true;
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} else {
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FormatError(archive_domain,
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"Not a regular file: %s",
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pathname);
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return false;
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}
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}
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//find one dir up
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if (slash != nullptr)
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*slash = '/';
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slash = FindSlash(pathname, idx - 1);
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if (slash == nullptr)
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return false;
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*slash = 0;
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idx = slash - pathname;
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}
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}
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