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import os::getcwd;
import os_fs;
native "rust" mod rustrt {
fn rust_file_is_dir(path: str::sbuf) -> int;
}
fn path_sep() -> str { ret str::from_char(os_fs::path_sep); }
type path = str;
fn dirname(p: path) -> path {
let i: int = str::rindex(p, os_fs::path_sep as u8);
if i == -1 {
i = str::rindex(p, os_fs::alt_path_sep as u8);
if i == -1 { ret "."; }
}
ret str::substr(p, 0u, i as uint);
}
fn basename(p: path) -> path {
let i: int = str::rindex(p, os_fs::path_sep as u8);
if i == -1 {
i = str::rindex(p, os_fs::alt_path_sep as u8);
if i == -1 { ret p; }
}
let len = str::byte_len(p);
if i + 1 as uint >= len { ret p; }
ret str::slice(p, i + 1 as uint, len);
}
// FIXME: Need some typestate to avoid bounds check when len(pre) == 0
fn connect(pre: path, post: path) -> path {
let len = str::byte_len(pre);
ret if pre[len - 1u] == os_fs::path_sep as u8 {
// Trailing '/'?
pre + post
} else { pre + path_sep() + post };
}
fn connect_many(paths: [path]) : vec::is_not_empty(paths) -> path {
ret if vec::len(paths) == 1u {
paths[0]
} else {
let rest = vec::slice(paths, 1u, vec::len(paths));
check vec::is_not_empty(rest);
connect(paths[0], connect_many(rest))
}
}
fn file_is_dir(p: path) -> bool {
ret str::as_buf(p, {|buf| rustrt::rust_file_is_dir(buf) != 0 });
}
fn list_dir(p: path) -> [str] {
let p = p;
let pl = str::byte_len(p);
if pl == 0u || p[pl - 1u] as char != os_fs::path_sep { p += path_sep(); }
let full_paths: [str] = [];
for filename: str in os_fs::list_dir(p) {
if !str::eq(filename, ".") {
if !str::eq(filename, "..") { full_paths += [p + filename]; }
}
}
ret full_paths;
}
fn path_is_absolute(p: path) -> bool { ret os_fs::path_is_absolute(p); }
// FIXME: under Windows, we should prepend the current drive letter to paths
// that start with a slash.
fn make_absolute(p: path) -> path {
if path_is_absolute(p) { ret p; } else { ret connect(getcwd(), p); }
}
fn split(p: path) -> [path] {
let split1 = str::split(p, os_fs::path_sep as u8);
let split2 = [];
for s in split1 {
split2 += str::split(s, os_fs::alt_path_sep as u8);
}
ret split2;
}
fn normalize(p: path) -> path {
let s = split(p);
let s = strip_dots(s);
let s = rollup_doubledots(s);
let s = if check vec::is_not_empty(s) {
connect_many(s)
} else {
""
};
let s = reabsolute(p, s);
let s = reterminate(p, s);
let s = if str::byte_len(s) == 0u {
"."
} else {
s
};
ret s;
fn strip_dots(s: [path]) -> [path] {
vec::filter_map({ |elem|
if elem == "." {
option::none
} else {
option::some(elem)
}
}, s)
}
fn rollup_doubledots(s: [path]) -> [path] {
if vec::is_empty(s) {
ret [];
}
let t = [];
let i = vec::len(s);
let skip = 0;
do {
i -= 1u;
if s[i] == ".." {
skip += 1;
} else {
if skip == 0 {
t += [s[i]];
} else {
skip -= 1;
}
}
} while i != 0u;
let t = vec::reversed(t);
while skip > 0 {
t += [".."];
skip -= 1;
}
ret t;
}
#[cfg(target_os = "linux")]
#[cfg(target_os = "macos")]
fn reabsolute(orig: path, new: path) -> path {
if path_is_absolute(orig) {
path_sep() + new
} else {
new
}
}
#[cfg(target_os = "win32")]
fn reabsolute(orig: path, new: path) -> path {
if path_is_absolute(orig) && orig[0] == os_fs::path_sep as u8 {
str::from_char(os_fs::path_sep) + new
} else {
new
}
}
fn reterminate(orig: path, new: path) -> path {
let last = orig[str::byte_len(orig) - 1u];
if last == os_fs::path_sep as u8
|| last == os_fs::path_sep as u8 {
ret new + path_sep();
} else {
ret new;
}
}
}
// Local Variables:
// mode: rust;
// fill-column: 78;
// indent-tabs-mode: nil
// c-basic-offset: 4
// buffer-file-coding-system: utf-8-unix
// compile-command: "make -k -C $RBUILD 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
// End:
|
