#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
+ #include <stdio.h>
`}
# File Abstract Stream
var path: nullable String = null
# The FILE *.
- var _file: nullable NativeFile = null
+ private var file: nullable NativeFile = null
- fun file_stat: FileStat
- do return _file.file_stat end
+ # The status of a file. see POSIX stat(2).
+ fun file_stat: FileStat do return _file.file_stat
+
+ # File descriptor of this file
+ fun fd: Int do return _file.fileno
end
# File input stream
class IFStream
super FStream
super BufferedIStream
+ super PollableIStream
# Misc
# Open the same file again.
redef fun close
do
var i = _file.io_close
+ _buffer.clear
end_reached = true
end
end
end
- private init do end
- private init without_file do end
end
# File output stream
redef fun write(s)
do
- assert _writable
+ assert _is_writable
if s isa FlatText then
write_native(s.to_cstring, s.length)
else
end
end
- redef fun is_writable do return _writable
-
redef fun close
do
var i = _file.io_close
- _writable = false
+ _is_writable = false
end
- # Is the file open in write mode
- var _writable: Bool
+ redef var is_writable = false
# Write `len` bytes from `native`.
private fun write_native(native: NativeString, len: Int)
do
- assert _writable
+ assert _is_writable
var err = _file.io_write(native, len)
if err != len then
# Big problem
print "Error: Opening file at '{path}' failed with '{sys.errno.strerror}'"
end
self.path = path
- _writable = true
+ _is_writable = true
end
-
- private init do end
- private init without_file do end
end
###############################################################################
+# Standard input stream.
class Stdin
super IFStream
- super PollableIStream
- private init do
+ init do
_file = new NativeFile.native_stdin
path = "/dev/stdin"
prepare_buffer(1)
redef fun poll_in: Bool is extern "file_stdin_poll_in"
end
+# Standard output stream.
class Stdout
super OFStream
- private init do
+ init do
_file = new NativeFile.native_stdout
path = "/dev/stdout"
- _writable = true
+ _is_writable = true
end
end
+# Standard error stream.
class Stderr
super OFStream
- private init do
+ init do
_file = new NativeFile.native_stderr
path = "/dev/stderr"
- _writable = true
+ _is_writable = true
end
end
# assert "dir/../../".simplify_path == ".."
# assert "dir/..".simplify_path == "."
# assert "//absolute//path/".simplify_path == "/absolute/path"
+ # assert "//absolute//../".simplify_path == "/"
fun simplify_path: String
do
var a = self.split_with("/")
a2.push(x)
end
if a2.is_empty then return "."
+ if a2.length == 1 and a2.first == "" then return "/"
return a2.join("/")
end
# Correctly join two path using the directory separator.
#
- # Using a standard "{self}/{path}" does not work when `self` is the empty string.
- # This method ensure that the join is valid.
+ # Using a standard "{self}/{path}" does not work in the following cases:
+ #
+ # * `self` is empty.
+ # * `path` ends with `'/'`.
+ # * `path` starts with `'/'`.
#
- # assert "hello".join_path("world") == "hello/world"
- # assert "hel/lo".join_path("wor/ld") == "hel/lo/wor/ld"
- # assert "".join_path("world") == "world"
- # assert "/hello".join_path("/world") == "/world"
+ # This method ensures that the join is valid.
#
- # Note: you may want to use `simplify_path` on the result
+ # assert "hello".join_path("world") == "hello/world"
+ # assert "hel/lo".join_path("wor/ld") == "hel/lo/wor/ld"
+ # assert "".join_path("world") == "world"
+ # assert "hello".join_path("/world") == "/world"
+ # assert "hello/".join_path("world") == "hello/world"
+ # assert "hello/".join_path("/world") == "/world"
#
- # Note: I you want to join a great number of path, you can write
+ # Note: You may want to use `simplify_path` on the result.
#
- # [p1, p2, p3, p4].join("/")
+ # Note: This method works only with POSIX paths.
fun join_path(path: String): String
do
if path.is_empty then return self
if self.is_empty then return path
if path.chars[0] == '/' then return path
+ if self.last == '/' then return "{self}{path}"
return "{self}/{path}"
end
+ # Convert the path (`self`) to a program name.
+ #
+ # Ensure the path (`self`) will be treated as-is by POSIX shells when it is
+ # used as a program name. In order to do that, prepend `./` if needed.
+ #
+ # assert "foo".to_program_name == "./foo"
+ # assert "/foo".to_program_name == "/foo"
+ # assert "".to_program_name == "./" # At least, your shell will detect the error.
+ fun to_program_name: String do
+ if self.has_prefix("/") then
+ return self
+ else
+ return "./{self}"
+ end
+ end
+
+ # Alias for `join_path`
+ #
+ # assert "hello" / "world" == "hello/world"
+ # assert "hel/lo" / "wor/ld" == "hel/lo/wor/ld"
+ # assert "" / "world" == "world"
+ # assert "/hello" / "/world" == "/world"
+ #
+ # This operator is quite useful for chaining changes of path.
+ # The next one being relative to the previous one.
+ #
+ # var a = "foo"
+ # var b = "/bar"
+ # var c = "baz/foobar"
+ # assert a/b/c == "/bar/baz/foobar"
+ fun /(path: String): String do return join_path(path)
+
+ # Returns the relative path needed to go from `self` to `dest`.
+ #
+ # assert "/foo/bar".relpath("/foo/baz") == "../baz"
+ # assert "/foo/bar".relpath("/baz/bar") == "../../baz/bar"
+ #
+ # If `self` or `dest` is relative, they are considered relatively to `getcwd`.
+ #
+ # In some cases, the result is still independent of the current directory:
+ #
+ # assert "foo/bar".relpath("..") == "../../.."
+ #
+ # In other cases, parts of the current directory may be exhibited:
+ #
+ # var p = "../foo/bar".relpath("baz")
+ # var c = getcwd.basename("")
+ # assert p == "../../{c}/baz"
+ #
+ # For path resolution independent of the current directory (eg. for paths in URL),
+ # or to use an other starting directory than the current directory,
+ # just force absolute paths:
+ #
+ # var start = "/a/b/c/d"
+ # var p2 = (start/"../foo/bar").relpath(start/"baz")
+ # assert p2 == "../../d/baz"
+ #
+ #
+ # Neither `self` or `dest` has to be real paths or to exist in directories since
+ # the resolution is only done with string manipulations and without any access to
+ # the underlying file system.
+ #
+ # If `self` and `dest` are the same directory, the empty string is returned:
+ #
+ # assert "foo".relpath("foo") == ""
+ # assert "foo/../bar".relpath("bar") == ""
+ #
+ # The empty string and "." designate both the current directory:
+ #
+ # assert "".relpath("foo/bar") == "foo/bar"
+ # assert ".".relpath("foo/bar") == "foo/bar"
+ # assert "foo/bar".relpath("") == "../.."
+ # assert "/" + "/".relpath(".") == getcwd
+ fun relpath(dest: String): String
+ do
+ var cwd = getcwd
+ var from = (cwd/self).simplify_path.split("/")
+ if from.last.is_empty then from.pop # case for the root directory
+ var to = (cwd/dest).simplify_path.split("/")
+ if to.last.is_empty then to.pop # case for the root directory
+
+ # Remove common prefixes
+ while not from.is_empty and not to.is_empty and from.first == to.first do
+ from.shift
+ to.shift
+ end
+
+ # Result is going up in `from` with ".." then going down following `to`
+ var from_len = from.length
+ if from_len == 0 then return to.join("/")
+ var up = "../"*(from_len-1) + ".."
+ if to.is_empty then return up
+ var res = up + "/" + to.join("/")
+ return res
+ end
+
# Create a directory (and all intermediate directories if needed)
fun mkdir
do
end
end
+ # Delete a directory and all of its content, return `true` on success
+ #
+ # Does not go through symbolic links and may get stuck in a cycle if there
+ # is a cycle in the filesystem.
+ fun rmdir: Bool
+ do
+ var ok = true
+ for file in self.files do
+ var file_path = self.join_path(file)
+ var stat = file_path.file_lstat
+ if stat.is_dir then
+ ok = file_path.rmdir and ok
+ else
+ ok = file_path.file_delete and ok
+ end
+ stat.free
+ end
+
+ # Delete the directory itself
+ if ok then to_cstring.rmdir
+
+ return ok
+ end
+
# Change the current working directory
#
# "/etc".chdir
return stat_element;
`}
private fun file_mkdir: Bool is extern "string_NativeString_NativeString_file_mkdir_0"
+ private fun rmdir: Bool `{ return rmdir(recv); `}
private fun file_delete: Bool is extern "string_NativeString_NativeString_file_delete_0"
private fun file_chdir is extern "string_NativeString_NativeString_file_chdir_0"
private fun file_realpath: NativeString is extern "file_NativeString_realpath"
fun io_write(buf: NativeString, len: Int): Int is extern "file_NativeFile_NativeFile_io_write_2"
fun io_close: Int is extern "file_NativeFile_NativeFile_io_close_0"
fun file_stat: FileStat is extern "file_NativeFile_NativeFile_file_stat_0"
+ fun fileno: Int `{ return fileno(recv); `}
new io_open_read(path: NativeString) is extern "file_NativeFileCapable_NativeFileCapable_io_open_read_1"
new io_open_write(path: NativeString) is extern "file_NativeFileCapable_NativeFileCapable_io_open_write_1"
redef class Sys
# Standard input
- var stdin: PollableIStream protected writable = new Stdin
+ var stdin: PollableIStream = new Stdin is protected writable
# Standard output
- var stdout: OStream protected writable = new Stdout
+ var stdout: OStream = new Stdout is protected writable
# Standard output for errors
- var stderr: OStream protected writable = new Stderr
+ var stderr: OStream = new Stderr is protected writable
end
nitlanguage / nit.git / blobdiff