rust/src/libcore/path.rs

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// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
/*!
Cross-platform file path handling
*/
// NB: transitionary, de-mode-ing.
#[forbid(deprecated_mode)];
#[forbid(deprecated_pattern)];
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use cmp::Eq;
use libc;
use option::{None, Option, Some};
use ptr;
use str;
use to_str::ToStr;
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#[deriving_eq]
pub struct WindowsPath {
host: Option<~str>,
device: Option<~str>,
is_absolute: bool,
components: ~[~str],
}
pub pure fn WindowsPath(s: &str) -> WindowsPath {
GenericPath::from_str(s)
}
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#[deriving_eq]
pub struct PosixPath {
is_absolute: bool,
components: ~[~str],
}
pub pure fn PosixPath(s: &str) -> PosixPath {
GenericPath::from_str(s)
}
pub trait GenericPath {
static pure fn from_str(&str) -> self;
pure fn dirname() -> ~str;
pure fn filename() -> Option<~str>;
pure fn filestem() -> Option<~str>;
pure fn filetype() -> Option<~str>;
pure fn with_dirname((&str)) -> self;
pure fn with_filename((&str)) -> self;
pure fn with_filestem((&str)) -> self;
pure fn with_filetype((&str)) -> self;
pure fn dir_path() -> self;
pure fn file_path() -> self;
pure fn push((&str)) -> self;
pure fn push_rel((&self)) -> self;
pure fn push_many((&[~str])) -> self;
pure fn pop() -> self;
pure fn normalize() -> self;
}
#[cfg(windows)]
pub type Path = WindowsPath;
#[cfg(windows)]
pub pure fn Path(s: &str) -> Path {
WindowsPath(s)
}
#[cfg(unix)]
pub type Path = PosixPath;
#[cfg(unix)]
pub pure fn Path(s: &str) -> Path {
PosixPath(s)
}
#[cfg(target_os = "linux")]
#[cfg(target_os = "android")]
mod stat {
#[cfg(target_arch = "x86")]
#[cfg(target_arch = "arm")]
pub mod arch {
use libc;
pub fn default_stat() -> libc::stat {
libc::stat {
st_dev: 0,
__pad1: 0,
st_ino: 0,
st_mode: 0,
st_nlink: 0,
st_uid: 0,
st_gid: 0,
st_rdev: 0,
__pad2: 0,
st_size: 0,
st_blksize: 0,
st_blocks: 0,
st_atime: 0,
st_atime_nsec: 0,
st_mtime: 0,
st_mtime_nsec: 0,
st_ctime: 0,
st_ctime_nsec: 0,
__unused4: 0,
__unused5: 0,
}
}
}
#[cfg(target_arch = "x86_64")]
pub mod arch {
use libc;
pub fn default_stat() -> libc::stat {
libc::stat {
st_dev: 0,
st_ino: 0,
st_nlink: 0,
st_mode: 0,
st_uid: 0,
st_gid: 0,
__pad0: 0,
st_rdev: 0,
st_size: 0,
st_blksize: 0,
st_blocks: 0,
st_atime: 0,
st_atime_nsec: 0,
st_mtime: 0,
st_mtime_nsec: 0,
st_ctime: 0,
st_ctime_nsec: 0,
__unused: [0, 0, 0],
}
}
}
}
#[cfg(target_os = "freebsd")]
mod stat {
#[cfg(target_arch = "x86_64")]
pub mod arch {
use libc;
pub fn default_stat() -> libc::stat {
libc::stat {
st_dev: 0,
st_ino: 0,
st_mode: 0,
st_nlink: 0,
st_uid: 0,
st_gid: 0,
st_rdev: 0,
st_atime: 0,
st_atime_nsec: 0,
st_mtime: 0,
st_mtime_nsec: 0,
st_ctime: 0,
st_ctime_nsec: 0,
st_size: 0,
st_blocks: 0,
st_blksize: 0,
st_flags: 0,
st_gen: 0,
st_lspare: 0,
st_birthtime: 0,
st_birthtime_nsec: 0,
__unused: [0, 0],
}
}
}
}
#[cfg(target_os = "macos")]
mod stat {
pub mod arch {
use libc;
pub fn default_stat() -> libc::stat {
libc::stat {
st_dev: 0,
st_mode: 0,
st_nlink: 0,
st_ino: 0,
st_uid: 0,
st_gid: 0,
st_rdev: 0,
st_atime: 0,
st_atime_nsec: 0,
st_mtime: 0,
st_mtime_nsec: 0,
st_ctime: 0,
st_ctime_nsec: 0,
st_birthtime: 0,
st_birthtime_nsec: 0,
st_size: 0,
st_blocks: 0,
st_blksize: 0,
st_flags: 0,
st_gen: 0,
st_lspare: 0,
st_qspare: [0, 0],
}
}
}
}
#[cfg(target_os = "win32")]
mod stat {
pub mod arch {
use libc;
pub fn default_stat() -> libc::stat {
libc::stat {
st_dev: 0,
st_ino: 0,
st_mode: 0,
st_nlink: 0,
st_uid: 0,
st_gid: 0,
st_rdev: 0,
st_size: 0,
st_atime: 0,
st_mtime: 0,
st_ctime: 0,
}
}
}
}
impl Path {
fn stat(&self) -> Option<libc::stat> {
unsafe {
do str::as_c_str(self.to_str()) |buf| {
let mut st = stat::arch::default_stat();
let r = libc::stat(buf, ptr::mut_addr_of(&st));
if r == 0 { Some(move st) } else { None }
}
}
}
#[cfg(unix)]
fn lstat(&self) -> Option<libc::stat> {
unsafe {
do str::as_c_str(self.to_str()) |buf| {
let mut st = stat::arch::default_stat();
let r = libc::lstat(buf, ptr::mut_addr_of(&st));
if r == 0 { Some(move st) } else { None }
}
}
}
fn exists(&self) -> bool {
match self.stat() {
None => false,
Some(_) => true,
}
}
fn get_size(&self) -> Option<i64> {
match self.stat() {
None => None,
Some(ref st) => Some(st.st_size as i64),
}
}
fn get_mode(&self) -> Option<uint> {
match self.stat() {
None => None,
Some(ref st) => Some(st.st_mode as uint),
}
}
}
#[cfg(target_os = "freebsd")]
#[cfg(target_os = "linux")]
#[cfg(target_os = "macos")]
impl Path {
fn get_atime(&self) -> Option<(i64, int)> {
match self.stat() {
None => None,
Some(ref st) => {
Some((st.st_atime as i64,
st.st_atime_nsec as int))
}
}
}
fn get_mtime(&self) -> Option<(i64, int)> {
match self.stat() {
None => None,
Some(ref st) => {
Some((st.st_mtime as i64,
st.st_mtime_nsec as int))
}
}
}
fn get_ctime(&self) -> Option<(i64, int)> {
match self.stat() {
None => None,
Some(ref st) => {
Some((st.st_ctime as i64,
st.st_ctime_nsec as int))
}
}
}
}
#[cfg(target_os = "freebsd")]
#[cfg(target_os = "macos")]
impl Path {
fn get_birthtime(&self) -> Option<(i64, int)> {
match self.stat() {
None => None,
Some(ref st) => {
Some((st.st_birthtime as i64,
st.st_birthtime_nsec as int))
}
}
}
}
#[cfg(target_os = "win32")]
impl Path {
fn get_atime(&self) -> Option<(i64, int)> {
match self.stat() {
None => None,
Some(ref st) => {
Some((st.st_atime as i64, 0))
}
}
}
fn get_mtime(&self) -> Option<(i64, int)> {
match self.stat() {
None => None,
Some(ref st) => {
Some((st.st_mtime as i64, 0))
}
}
}
fn get_ctime(&self) -> Option<(i64, int)> {
match self.stat() {
None => None,
Some(ref st) => {
Some((st.st_ctime as i64, 0))
}
}
}
}
impl PosixPath : ToStr {
pure fn to_str() -> ~str {
let mut s = ~"";
if self.is_absolute {
s += "/";
}
s + str::connect(self.components, "/")
}
}
// FIXME (#3227): when default methods in traits are working, de-duplicate
// PosixPath and WindowsPath, most of their methods are common.
impl PosixPath : GenericPath {
static pure fn from_str(s: &str) -> PosixPath {
let mut components = str::split_nonempty(s, |c| c == '/');
let is_absolute = (s.len() != 0 && s[0] == '/' as u8);
return PosixPath { is_absolute: is_absolute,
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components: move components }
}
pure fn dirname() -> ~str {
unsafe {
let s = self.dir_path().to_str();
if s.len() == 0 {
~"."
} else {
move s
}
}
}
pure fn filename() -> Option<~str> {
match self.components.len() {
0 => None,
n => Some(copy self.components[n - 1])
}
}
pure fn filestem() -> Option<~str> {
match self.filename() {
None => None,
Some(ref f) => {
match str::rfind_char(*f, '.') {
Some(p) => Some(f.slice(0, p)),
None => Some(copy *f)
}
}
}
}
pure fn filetype() -> Option<~str> {
match self.filename() {
None => None,
Some(ref f) => {
match str::rfind_char(*f, '.') {
Some(p) if p < f.len() => Some(f.slice(p, f.len())),
_ => None
}
}
}
}
pure fn with_dirname(d: &str) -> PosixPath {
let dpath = PosixPath(d);
match self.filename() {
Some(ref f) => dpath.push(*f),
None => move dpath
}
}
pure fn with_filename(f: &str) -> PosixPath {
unsafe {
assert ! str::any(f, |c| windows::is_sep(c as u8));
self.dir_path().push(f)
}
}
pure fn with_filestem(s: &str) -> PosixPath {
match self.filetype() {
None => self.with_filename(s),
Some(ref t) => self.with_filename(str::from_slice(s) + *t)
}
}
pure fn with_filetype(t: &str) -> PosixPath {
if t.len() == 0 {
match self.filestem() {
None => copy self,
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Some(ref s) => self.with_filename(*s)
}
} else {
let t = ~"." + str::from_slice(t);
match self.filestem() {
None => self.with_filename(t),
Some(ref s) => self.with_filename(*s + t)
}
}
}
pure fn dir_path() -> PosixPath {
if self.components.len() != 0 {
self.pop()
} else {
copy self
}
}
pure fn file_path() -> PosixPath {
let cs = match self.filename() {
None => ~[],
Some(ref f) => ~[copy *f]
};
return PosixPath { is_absolute: false,
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components: move cs }
}
pure fn push_rel(other: &PosixPath) -> PosixPath {
assert !other.is_absolute;
self.push_many(other.components)
}
pure fn push_many(cs: &[~str]) -> PosixPath {
let mut v = copy self.components;
for cs.each |e| {
let mut ss = str::split_nonempty(
*e,
|c| windows::is_sep(c as u8));
unsafe { v.push_all_move(move ss); }
}
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PosixPath { is_absolute: self.is_absolute,
components: move v }
}
pure fn push(s: &str) -> PosixPath {
let mut v = copy self.components;
let mut ss = str::split_nonempty(s, |c| windows::is_sep(c as u8));
unsafe { v.push_all_move(move ss); }
PosixPath { components: move v, ..copy self }
}
pure fn pop() -> PosixPath {
let mut cs = copy self.components;
if cs.len() != 0 {
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unsafe { cs.pop(); }
}
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return PosixPath {
is_absolute: self.is_absolute,
components: move cs
}
//..self }
}
pure fn normalize() -> PosixPath {
return PosixPath {
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is_absolute: self.is_absolute,
components: normalize(self.components)
// ..self
}
}
}
impl WindowsPath : ToStr {
pure fn to_str() -> ~str {
let mut s = ~"";
match self.host {
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Some(ref h) => { s += "\\\\"; s += *h; }
None => { }
}
match self.device {
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Some(ref d) => { s += *d; s += ":"; }
None => { }
}
if self.is_absolute {
s += "\\";
}
s + str::connect(self.components, "\\")
}
}
impl WindowsPath : GenericPath {
static pure fn from_str(s: &str) -> WindowsPath {
let host;
let device;
let rest;
match windows::extract_drive_prefix(s) {
Some((ref d, ref r)) => {
host = None;
device = Some(copy *d);
rest = copy *r;
}
None => {
match windows::extract_unc_prefix(s) {
Some((ref h, ref r)) => {
host = Some(copy *h);
device = None;
rest = copy *r;
}
None => {
host = None;
device = None;
rest = str::from_slice(s);
}
}
}
}
let mut components =
str::split_nonempty(rest, |c| windows::is_sep(c as u8));
let is_absolute = (rest.len() != 0 && windows::is_sep(rest[0]));
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return WindowsPath { host: move host,
device: move device,
is_absolute: is_absolute,
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components: move components }
}
pure fn dirname() -> ~str {
unsafe {
let s = self.dir_path().to_str();
if s.len() == 0 {
~"."
} else {
move s
}
}
}
pure fn filename() -> Option<~str> {
match self.components.len() {
0 => None,
n => Some(copy self.components[n - 1])
}
}
pure fn filestem() -> Option<~str> {
match self.filename() {
None => None,
Some(ref f) => {
match str::rfind_char(*f, '.') {
Some(p) => Some(f.slice(0, p)),
None => Some(copy *f)
}
}
}
}
pure fn filetype() -> Option<~str> {
match self.filename() {
None => None,
Some(ref f) => {
match str::rfind_char(*f, '.') {
Some(p) if p < f.len() => Some(f.slice(p, f.len())),
_ => None
}
}
}
}
pure fn with_dirname(d: &str) -> WindowsPath {
let dpath = WindowsPath(d);
match self.filename() {
Some(ref f) => dpath.push(*f),
None => move dpath
}
}
pure fn with_filename(f: &str) -> WindowsPath {
assert ! str::any(f, |c| windows::is_sep(c as u8));
self.dir_path().push(f)
}
pure fn with_filestem(s: &str) -> WindowsPath {
match self.filetype() {
None => self.with_filename(s),
Some(ref t) => self.with_filename(str::from_slice(s) + *t)
}
}
pure fn with_filetype(t: &str) -> WindowsPath {
if t.len() == 0 {
match self.filestem() {
None => copy self,
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Some(ref s) => self.with_filename(*s)
}
} else {
let t = ~"." + str::from_slice(t);
match self.filestem() {
None => self.with_filename(t),
Some(ref s) =>
self.with_filename(*s + t)
}
}
}
pure fn dir_path() -> WindowsPath {
if self.components.len() != 0 {
self.pop()
} else {
copy self
}
}
pure fn file_path() -> WindowsPath {
let cs = match self.filename() {
None => ~[],
Some(ref f) => ~[copy *f]
};
return WindowsPath { host: None,
device: None,
is_absolute: false,
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components: move cs }
}
pure fn push_rel(other: &WindowsPath) -> WindowsPath {
assert !other.is_absolute;
self.push_many(other.components)
}
pure fn push_many(cs: &[~str]) -> WindowsPath {
let mut v = copy self.components;
for cs.each |e| {
let mut ss = str::split_nonempty(
*e,
|c| windows::is_sep(c as u8));
unsafe { v.push_all_move(move ss); }
}
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// tedious, but as-is, we can't use ..self
return WindowsPath {
host: copy self.host,
device: copy self.device,
is_absolute: self.is_absolute,
components: move v
}
}
pure fn push(s: &str) -> WindowsPath {
let mut v = copy self.components;
let mut ss = str::split_nonempty(s, |c| windows::is_sep(c as u8));
unsafe { v.push_all_move(move ss); }
return WindowsPath { components: move v, ..copy self }
}
pure fn pop() -> WindowsPath {
let mut cs = copy self.components;
if cs.len() != 0 {
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unsafe { cs.pop(); }
}
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return WindowsPath {
host: copy self.host,
device: copy self.device,
is_absolute: self.is_absolute,
components: move cs
}
}
pure fn normalize() -> WindowsPath {
return WindowsPath {
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host: copy self.host,
device: copy self.device,
is_absolute: self.is_absolute,
components: normalize(self.components)
}
}
}
pub pure fn normalize(components: &[~str]) -> ~[~str] {
let mut cs = ~[];
unsafe {
for components.each |c| {
unsafe {
if *c == ~"." && components.len() > 1 { loop; }
if *c == ~"" { loop; }
if *c == ~".." && cs.len() != 0 {
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cs.pop();
loop;
}
cs.push(copy *c);
}
}
}
move cs
}
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// Various windows helpers, and tests for the impl.
pub mod windows {
use libc;
use option::{None, Option, Some};
use to_str::ToStr;
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#[inline(always)]
pub pure fn is_sep(u: u8) -> bool {
u == '/' as u8 || u == '\\' as u8
}
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pub pure fn extract_unc_prefix(s: &str) -> Option<(~str,~str)> {
if (s.len() > 1 &&
s[0] == '\\' as u8 &&
s[1] == '\\' as u8) {
let mut i = 2;
while i < s.len() {
if s[i] == '\\' as u8 {
let pre = s.slice(2, i);
let rest = s.slice(i, s.len());
return Some((move pre, move rest));
}
i += 1;
}
}
None
}
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pub pure fn extract_drive_prefix(s: &str) -> Option<(~str,~str)> {
unsafe {
if (s.len() > 1 &&
libc::isalpha(s[0] as libc::c_int) != 0 &&
s[1] == ':' as u8) {
let rest = if s.len() == 2 {
~""
} else {
s.slice(2, s.len())
};
return Some((s.slice(0,1), move rest));
}
None
}
}
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}
#[cfg(test)]
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mod tests {
use option::{None, Some};
use path::{PosixPath, WindowsPath, windows};
use str;
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#[test]
fn test_double_slash_collapsing() {
let path = PosixPath("tmp/");
let path = path.push("/hmm");
let path = path.normalize();
assert ~"tmp/hmm" == path.to_str();
let path = WindowsPath("tmp/");
let path = path.push("/hmm");
let path = path.normalize();
assert ~"tmp\\hmm" == path.to_str();
}
#[test]
fn test_filetype_foo_bar() {
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let wp = PosixPath("foo.bar");
assert wp.filetype() == Some(~".bar");
let wp = WindowsPath("foo.bar");
assert wp.filetype() == Some(~".bar");
}
#[test]
fn test_filetype_foo() {
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let wp = PosixPath("foo");
assert wp.filetype() == None;
let wp = WindowsPath("foo");
assert wp.filetype() == None;
}
#[test]
fn test_posix_paths() {
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fn t(wp: &PosixPath, s: &str) {
let ss = wp.to_str();
let sss = str::from_slice(s);
if (ss != sss) {
debug!("got %s", ss);
debug!("expected %s", sss);
assert ss == sss;
}
}
t(&(PosixPath("hi")), "hi");
t(&(PosixPath("/lib")), "/lib");
t(&(PosixPath("hi/there")), "hi/there");
t(&(PosixPath("hi/there.txt")), "hi/there.txt");
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t(&(PosixPath("hi/there.txt")), "hi/there.txt");
t(&(PosixPath("hi/there.txt")
.with_filetype("")), "hi/there");
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t(&(PosixPath("/a/b/c/there.txt")
.with_dirname("hi")), "hi/there.txt");
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t(&(PosixPath("hi/there.txt")
.with_dirname(".")), "./there.txt");
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t(&(PosixPath("a/b/c")
.push("..")), "a/b/c/..");
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t(&(PosixPath("there.txt")
.with_filetype("o")), "there.o");
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t(&(PosixPath("hi/there.txt")
.with_filetype("o")), "hi/there.o");
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t(&(PosixPath("hi/there.txt")
.with_filetype("o")
.with_dirname("/usr/lib")),
"/usr/lib/there.o");
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t(&(PosixPath("hi/there.txt")
.with_filetype("o")
.with_dirname("/usr/lib/")),
"/usr/lib/there.o");
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t(&(PosixPath("hi/there.txt")
.with_filetype("o")
.with_dirname("/usr//lib//")),
"/usr/lib/there.o");
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t(&(PosixPath("/usr/bin/rust")
.push_many([~"lib", ~"thingy.so"])
.with_filestem("librustc")),
"/usr/bin/rust/lib/librustc.so");
}
#[test]
fn test_normalize() {
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fn t(wp: &PosixPath, s: &str) {
let ss = wp.to_str();
let sss = str::from_slice(s);
if (ss != sss) {
debug!("got %s", ss);
debug!("expected %s", sss);
assert ss == sss;
}
}
t(&(PosixPath("hi/there.txt")
.with_dirname(".").normalize()), "there.txt");
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t(&(PosixPath("a/b/../c/././/../foo.txt/").normalize()),
"a/foo.txt");
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t(&(PosixPath("a/b/c")
.push("..").normalize()), "a/b");
}
#[test]
fn test_extract_unc_prefixes() {
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assert windows::extract_unc_prefix("\\\\").is_none();
assert windows::extract_unc_prefix("\\\\hi").is_none();
assert windows::extract_unc_prefix("\\\\hi\\") ==
Some((~"hi", ~"\\"));
assert windows::extract_unc_prefix("\\\\hi\\there") ==
Some((~"hi", ~"\\there"));
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assert windows::extract_unc_prefix("\\\\hi\\there\\friends.txt") ==
Some((~"hi", ~"\\there\\friends.txt"));
}
#[test]
fn test_extract_drive_prefixes() {
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assert windows::extract_drive_prefix("c").is_none();
assert windows::extract_drive_prefix("c:") == Some((~"c", ~""));
assert windows::extract_drive_prefix("d:") == Some((~"d", ~""));
assert windows::extract_drive_prefix("z:") == Some((~"z", ~""));
assert windows::extract_drive_prefix("c:\\hi") ==
Some((~"c", ~"\\hi"));
assert windows::extract_drive_prefix("d:hi") == Some((~"d", ~"hi"));
assert windows::extract_drive_prefix("c:hi\\there.txt") ==
Some((~"c", ~"hi\\there.txt"));
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assert windows::extract_drive_prefix("c:\\hi\\there.txt") ==
Some((~"c", ~"\\hi\\there.txt"));
}
#[test]
fn test_windows_paths() {
fn t(wp: &WindowsPath, s: &str) {
let ss = wp.to_str();
let sss = str::from_slice(s);
if (ss != sss) {
debug!("got %s", ss);
debug!("expected %s", sss);
assert ss == sss;
}
}
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t(&(WindowsPath("hi")), "hi");
t(&(WindowsPath("hi/there")), "hi\\there");
t(&(WindowsPath("hi/there.txt")), "hi\\there.txt");
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t(&(WindowsPath("there.txt")
.with_filetype("o")), "there.o");
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t(&(WindowsPath("hi/there.txt")
.with_filetype("o")), "hi\\there.o");
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t(&(WindowsPath("hi/there.txt")
.with_filetype("o")
.with_dirname("c:\\program files A")),
"c:\\program files A\\there.o");
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t(&(WindowsPath("hi/there.txt")
.with_filetype("o")
.with_dirname("c:\\program files B\\")),
"c:\\program files B\\there.o");
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t(&(WindowsPath("hi/there.txt")
.with_filetype("o")
.with_dirname("c:\\program files C\\/")),
"c:\\program files C\\there.o");
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t(&(WindowsPath("c:\\program files (x86)\\rust")
.push_many([~"lib", ~"thingy.dll"])
.with_filename("librustc.dll")),
"c:\\program files (x86)\\rust\\lib\\librustc.dll");
}
}