module file
intrude import stream
-intrude import string
+intrude import ropes
import string_search
import time
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
+ #include <stdio.h>
`}
-redef class Object
-# Simple I/O
-
- # Print `objects` on the standard output (`stdout`).
- protected fun printn(objects: Object...)
- do
- stdout.write(objects.to_s)
- end
-
- # Print an `object` on the standard output (`stdout`) and add a newline.
- protected fun print(object: Object)
- do
- stdout.write(object.to_s)
- stdout.write("\n")
- end
-
- # Read a character from the standard input (`stdin`).
- protected fun getc: Char
- do
- return stdin.read_char.ascii
- end
-
- # Read a line from the standard input (`stdin`).
- protected fun gets: String
- do
- return stdin.read_line
- end
-
- # Return the working (current) directory
- protected fun getcwd: String do return file_getcwd.to_s
- private fun file_getcwd: NativeString is extern "string_NativeString_NativeString_file_getcwd_0"
-end
-
# File Abstract Stream
abstract class FStream
super IOS
# The path of the file.
- readable var _path: nullable String = null
+ 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.
fun reopen
do
if not eof then close
- _file = new NativeFile.io_open_read(_path.to_cstring)
- _end_reached = false
+ _file = new NativeFile.io_open_read(path.to_cstring)
+ end_reached = false
_buffer_pos = 0
_buffer.clear
end
redef fun close
do
var i = _file.io_close
- _end_reached = true
+ _buffer.clear
+ end_reached = true
end
redef fun fill_buffer
do
- var nb = _file.io_read(_buffer._items, _buffer._capacity)
+ var nb = _file.io_read(_buffer.items, _buffer.capacity)
if nb <= 0 then
- _end_reached = true
+ end_reached = true
nb = 0
end
- _buffer._length = nb
+ _buffer.length = nb
_buffer_pos = 0
end
# End of file?
- redef readable var _end_reached: Bool = false
+ redef var end_reached: Bool = false
# Open the file at `path` for reading.
init open(path: String)
do
- _path = path
+ self.path = path
prepare_buffer(10)
- _file = new NativeFile.io_open_read(_path.to_cstring)
- assert cant_open_file: _file != null
+ _file = new NativeFile.io_open_read(path.to_cstring)
+ assert not _file.address_is_null else
+ print "Error: Opening file at '{path}' failed with '{sys.errno.strerror}'"
+ end
end
- private init do end
- private init without_file do end
end
# File output stream
redef fun write(s)
do
- assert _writable
- write_native(s.to_cstring, s.length)
+ assert _is_writable
+ if s isa FlatText then
+ write_native(s.to_cstring, s.length)
+ else
+ for i in s.substrings do write_native(i.to_cstring, i.length)
+ 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
init open(path: String)
do
_file = new NativeFile.io_open_write(path.to_cstring)
- assert cant_open_file: _file != null
- _path = path
- _writable = true
+ assert not _file.address_is_null else
+ print "Error: Opening file at '{path}' failed with '{sys.errno.strerror}'"
+ end
+ self.path = path
+ _is_writable = true
end
-
- private init do end
- private init without_file do end
end
###############################################################################
+# Standard input stream.
class Stdin
super IFStream
- private init do
+
+ init do
_file = new NativeFile.native_stdin
- _path = "/dev/stdin"
+ path = "/dev/stdin"
prepare_buffer(1)
end
- # Is these something to read? (non blocking)
- # FIXME: should be generalized
- fun poll_in: Bool is extern "file_stdin_poll_in"
+ 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
+ path = "/dev/stdout"
+ _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
+ path = "/dev/stderr"
+ _is_writable = true
end
end
# assert "".basename("") == ""
fun basename(ext: String): String
do
- var l = _length - 1 # Index of the last char
+ var l = length - 1 # Index of the last char
while l > 0 and self.chars[l] == '/' do l -= 1 # remove all trailing `/`
if l == 0 then return "/"
- var pos = last_index_of_from('/', l)
+ var pos = chars.last_index_of_from('/', l)
var n = self
if pos >= 0 then
n = substring(pos+1, l-pos)
# assert "".dirname == "."
fun dirname: String
do
- var l = _length - 1 # Index of the last char
+ var l = length - 1 # Index of the last char
while l > 0 and self.chars[l] == '/' do l -= 1 # remove all trailing `/`
- var pos = last_index_of_from('/', l)
+ var pos = chars.last_index_of_from('/', l)
if pos > 0 then
return substring(0, pos)
else if pos == 0 then
# 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
var dirs = self.split_with("/")
- var path = new Buffer
+ var path = new FlatBuffer
if dirs.is_empty then return
if dirs[0].is_empty then
# it was a starting /
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
# assert ".file".file_extension == null
fun file_extension: nullable String
do
- var last_slash = last_index_of('.')
+ var last_slash = chars.last_index_of('.')
if last_slash > 0 then
return substring( last_slash+1, length )
else
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"
end
# Instance of this class are standard FILE * pointers
-private extern NativeFile `{ FILE* `}
+private extern class NativeFile `{ FILE* `}
fun io_read(buf: NativeString, len: Int): Int is extern "file_NativeFile_NativeFile_io_read_2"
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"
new native_stderr is extern "file_NativeFileCapable_NativeFileCapable_native_stderr_0"
end
-# Standard input.
-fun stdin: Stdin do return once new Stdin
+redef class Sys
+
+ # Standard input
+ var stdin: PollableIStream = new Stdin is protected writable
+
+ # Standard output
+ var stdout: OStream = new Stdout is protected writable
+
+ # Standard output for errors
+ var stderr: OStream = new Stderr is protected writable
-# Standard output.
-fun stdout: OFStream do return once new Stdout
+end
+
+# Print `objects` on the standard output (`stdout`).
+protected fun printn(objects: Object...)
+do
+ sys.stdout.write(objects.to_s)
+end
+
+# Print an `object` on the standard output (`stdout`) and add a newline.
+protected fun print(object: Object)
+do
+ sys.stdout.write(object.to_s)
+ sys.stdout.write("\n")
+end
+
+# Read a character from the standard input (`stdin`).
+protected fun getc: Char
+do
+ return sys.stdin.read_char.ascii
+end
+
+# Read a line from the standard input (`stdin`).
+protected fun gets: String
+do
+ return sys.stdin.read_line
+end
-# Standard output for error.
-fun stderr: OFStream do return once new Stderr
+# Return the working (current) directory
+protected fun getcwd: String do return file_getcwd.to_s
+private fun file_getcwd: NativeString is extern "string_NativeString_NativeString_file_getcwd_0"
nitlanguage / nit.git / blobdiff