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filesystem::canonical

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This commit is contained in:
Kelvin Sherlock 2016-02-11 20:50:38 -05:00
parent 7d18720162
commit ca4fafb62c
1 changed files with 43 additions and 0 deletions
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43
cxx/filesystem.cpp
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@ -286,4 +286,47 @@ namespace filesystem {
syscall(ec, ::chdir, p.c_str());
}
path canonical(const path& p, const path& base) {
error_code ec;
path rv = canonical(p, base, ec);
if (ec)
throw filesystem_error("filesystem::canonical", p, ec);
return rv;
}
path canonical(const path& p, error_code& ec) {
char *cp;
char buffer[PATH_MAX];
ec.clear();
cp = realpath(p.c_str(), buffer);
if (cp) return path(cp);
ec = error_code(errno, std::system_category());
return path();
}
path canonical(const path& p, const path& base, error_code& ec) {
char *cp;
char buffer[PATH_MAX];
ec.clear();
if (p.is_absolute()) cp = realpath(p.c_str(), buffer);
else {
path tmp = base;
tmp /= p;
cp = realpath(tmp.c_str(), buffer);
}
if (cp) return path(cp);
ec = error_code(errno, std::system_category());
return path();
}
}