841 lines
24 KiB
Rust
841 lines
24 KiB
Rust
/*
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Module: io
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Basic input/output
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*/
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import result::result;
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import libc::{c_int, c_uint, c_void, size_t, ssize_t};
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import libc::consts::os::posix88::*;
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import libc::consts::os::extra::*;
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type fd_t = c_int;
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#[abi = "cdecl"]
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native mod rustrt {
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fn rust_get_stdin() -> *libc::FILE;
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fn rust_get_stdout() -> *libc::FILE;
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fn rust_get_stderr() -> *libc::FILE;
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}
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// Reading
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// FIXME This is all buffered. We might need an unbuffered variant as well
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// #2004
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enum seek_style { seek_set, seek_end, seek_cur, }
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// The raw underlying reader iface. All readers must implement this.
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iface reader {
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// FIXME: Seekable really should be orthogonal. // #2004
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fn read_bytes(uint) -> [u8];
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fn read_byte() -> int;
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fn unread_byte(int);
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fn eof() -> bool;
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fn seek(int, seek_style);
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fn tell() -> uint;
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}
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// Generic utility functions defined on readers
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impl reader_util for reader {
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fn read_chars(n: uint) -> [char] {
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// returns the (consumed offset, n_req), appends characters to &chars
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fn chars_from_buf(buf: [u8], &chars: [char]) -> (uint, uint) {
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let mut i = 0u;
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while i < vec::len(buf) {
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let b0 = buf[i];
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let w = str::utf8_char_width(b0);
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let end = i + w;
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i += 1u;
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assert (w > 0u);
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if w == 1u {
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chars += [ b0 as char ];
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cont;
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}
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// can't satisfy this char with the existing data
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if end > vec::len(buf) {
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ret (i - 1u, end - vec::len(buf));
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}
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let mut val = 0u;
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while i < end {
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let next = buf[i] as int;
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i += 1u;
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assert (next > -1);
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assert (next & 192 == 128);
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val <<= 6u;
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val += (next & 63) as uint;
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}
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// See str::char_at
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val += ((b0 << ((w + 1u) as u8)) as uint)
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<< (w - 1u) * 6u - w - 1u;
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chars += [ val as char ];
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}
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ret (i, 0u);
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}
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let mut buf: [u8] = [];
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let mut chars: [char] = [];
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// might need more bytes, but reading n will never over-read
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let mut nbread = n;
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while nbread > 0u {
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let data = self.read_bytes(nbread);
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if vec::len(data) == 0u {
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// eof - FIXME should we do something if
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// we're split in a unicode char? // #2004
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break;
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}
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buf += data;
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let (offset, nbreq) = chars_from_buf(buf, chars);
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let ncreq = n - vec::len(chars);
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// again we either know we need a certain number of bytes
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// to complete a character, or we make sure we don't
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// over-read by reading 1-byte per char needed
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nbread = if ncreq > nbreq { ncreq } else { nbreq };
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if nbread > 0u {
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buf = vec::slice(buf, offset, vec::len(buf));
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}
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}
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chars
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}
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fn read_char() -> char {
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let c = self.read_chars(1u);
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if vec::len(c) == 0u {
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ret -1 as char; // FIXME will this stay valid? // #2004
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}
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assert(vec::len(c) == 1u);
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ret c[0];
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}
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fn read_line() -> str {
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let mut buf: [u8] = [];
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loop {
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let ch = self.read_byte();
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if ch == -1 || ch == 10 { break; }
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buf += [ch as u8];
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}
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str::from_bytes(buf)
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}
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fn read_c_str() -> str {
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let mut buf: [u8] = [];
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loop {
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let ch = self.read_byte();
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if ch < 1 { break; } else { buf += [ch as u8]; }
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}
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str::from_bytes(buf)
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}
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// FIXME deal with eof? // #2004
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fn read_le_uint(size: uint) -> uint {
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let mut val = 0u, pos = 0u, i = size;
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while i > 0u {
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val += (self.read_byte() as uint) << pos;
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pos += 8u;
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i -= 1u;
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}
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val
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}
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fn read_le_int(size: uint) -> int {
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let mut val = 0u, pos = 0u, i = size;
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while i > 0u {
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val += (self.read_byte() as uint) << pos;
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pos += 8u;
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i -= 1u;
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}
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val as int
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}
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fn read_be_uint(size: uint) -> uint {
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let mut val = 0u, i = size;
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while i > 0u {
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i -= 1u;
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val += (self.read_byte() as uint) << i * 8u;
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}
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val
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}
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fn read_whole_stream() -> [u8] {
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let mut buf: [u8] = [];
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while !self.eof() { buf += self.read_bytes(2048u); }
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buf
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}
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}
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// Reader implementations
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fn convert_whence(whence: seek_style) -> i32 {
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ret alt whence {
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seek_set { 0i32 }
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seek_cur { 1i32 }
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seek_end { 2i32 }
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};
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}
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impl of reader for *libc::FILE {
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fn read_bytes(len: uint) -> [u8] unsafe {
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let mut buf : [mut u8] = [mut];
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vec::reserve(buf, len);
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vec::as_mut_buf(buf) {|b|
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let read = libc::fread(b as *mut c_void, 1u,
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len, self);
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vec::unsafe::set_len(buf, read);
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}
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ret vec::from_mut(buf);
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}
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fn read_byte() -> int { ret libc::fgetc(self) as int; }
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fn unread_byte(byte: int) { libc::ungetc(byte as c_int, self); }
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fn eof() -> bool { ret libc::feof(self) != 0 as c_int; }
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fn seek(offset: int, whence: seek_style) {
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assert libc::fseek(self, offset, convert_whence(whence))
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== 0 as c_int;
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}
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fn tell() -> uint { ret libc::ftell(self) as uint; }
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}
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// A forwarding impl of reader that also holds on to a resource for the
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// duration of its lifetime.
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// FIXME there really should be a better way to do this // #2004
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impl <T: reader, C> of reader for {base: T, cleanup: C} {
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fn read_bytes(len: uint) -> [u8] { self.base.read_bytes(len) }
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fn read_byte() -> int { self.base.read_byte() }
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fn unread_byte(byte: int) { self.base.unread_byte(byte); }
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fn eof() -> bool { self.base.eof() }
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fn seek(off: int, whence: seek_style) { self.base.seek(off, whence) }
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fn tell() -> uint { self.base.tell() }
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}
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resource FILE_res(f: *libc::FILE) { libc::fclose(f); }
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fn FILE_reader(f: *libc::FILE, cleanup: bool) -> reader {
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if cleanup {
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{base: f, cleanup: FILE_res(f)} as reader
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} else {
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f as reader
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}
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}
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// FIXME: this should either be an iface-less impl, a set of top-level
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// functions that take a reader, or a set of default methods on reader
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// (which can then be called reader) // #2004
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fn stdin() -> reader { rustrt::rust_get_stdin() as reader }
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fn file_reader(path: str) -> result<reader, str> {
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let f = os::as_c_charp(path, {|pathbuf|
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os::as_c_charp("r", {|modebuf|
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libc::fopen(pathbuf, modebuf)
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})
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});
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ret if f as uint == 0u { result::err("error opening " + path) }
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else {
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result::ok(FILE_reader(f, true))
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}
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}
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// Byte buffer readers
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// TODO: const u8, but this fails with rustboot.
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type byte_buf = {buf: [u8], mut pos: uint, len: uint};
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impl of reader for byte_buf {
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fn read_bytes(len: uint) -> [u8] {
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let rest = self.len - self.pos;
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let mut to_read = len;
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if rest < to_read { to_read = rest; }
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let range = vec::slice(self.buf, self.pos, self.pos + to_read);
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self.pos += to_read;
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ret range;
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}
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fn read_byte() -> int {
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if self.pos == self.len { ret -1; }
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let b = self.buf[self.pos];
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self.pos += 1u;
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ret b as int;
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}
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fn unread_byte(_byte: int) { #error("TODO: unread_byte"); fail; }
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fn eof() -> bool { self.pos == self.len }
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fn seek(offset: int, whence: seek_style) {
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let pos = self.pos;
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self.pos = seek_in_buf(offset, pos, self.len, whence);
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}
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fn tell() -> uint { self.pos }
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}
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fn bytes_reader(bytes: [u8]) -> reader {
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bytes_reader_between(bytes, 0u, vec::len(bytes))
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}
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fn bytes_reader_between(bytes: [u8], start: uint, end: uint) -> reader {
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{buf: bytes, mut pos: start, len: end} as reader
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}
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fn with_bytes_reader<t>(bytes: [u8], f: fn(reader) -> t) -> t {
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f(bytes_reader(bytes))
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}
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fn with_bytes_reader_between<t>(bytes: [u8], start: uint, end: uint,
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f: fn(reader) -> t) -> t {
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f(bytes_reader_between(bytes, start, end))
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}
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fn str_reader(s: str) -> reader {
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bytes_reader(str::bytes(s))
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}
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fn with_str_reader<T>(s: str, f: fn(reader) -> T) -> T {
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str::as_bytes(s) { |bytes|
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with_bytes_reader_between(bytes, 0u, str::len(s), f)
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}
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}
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// Writing
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enum fileflag { append, create, truncate, no_flag, }
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// FIXME: Seekable really should be orthogonal.
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// FIXME: eventually u64
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// #2004
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iface writer {
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fn write([const u8]/&);
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fn seek(int, seek_style);
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fn tell() -> uint;
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fn flush() -> int;
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}
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impl <T: writer, C> of writer for {base: T, cleanup: C} {
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fn write(bs: [const u8]/&) { self.base.write(bs); }
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fn seek(off: int, style: seek_style) { self.base.seek(off, style); }
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fn tell() -> uint { self.base.tell() }
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fn flush() -> int { self.base.flush() }
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}
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impl of writer for *libc::FILE {
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fn write(v: [const u8]/&) unsafe {
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vec::unpack_slice(v) {|vbuf, len|
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let nout = libc::fwrite(vbuf as *c_void, len, 1u, self);
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if nout < 1 as size_t {
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#error("error writing buffer");
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log(error, os::last_os_error());
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fail;
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}
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}
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}
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fn seek(offset: int, whence: seek_style) {
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assert libc::fseek(self, offset, convert_whence(whence))
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== 0 as c_int;
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}
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fn tell() -> uint { libc::ftell(self) as uint }
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fn flush() -> int { libc::fflush(self) as int }
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}
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fn FILE_writer(f: *libc::FILE, cleanup: bool) -> writer {
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if cleanup {
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{base: f, cleanup: FILE_res(f)} as writer
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} else {
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f as writer
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}
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}
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impl of writer for fd_t {
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fn write(v: [const u8]/&) unsafe {
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let mut count = 0u;
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vec::unpack_slice(v) {|vbuf, len|
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while count < len {
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let vb = ptr::offset(vbuf, count) as *c_void;
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let nout = libc::write(self, vb, len);
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if nout < 0 as ssize_t {
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#error("error writing buffer");
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log(error, os::last_os_error());
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fail;
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}
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count += nout as uint;
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}
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}
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}
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fn seek(_offset: int, _whence: seek_style) {
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#error("need 64-bit native calls for seek, sorry");
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fail;
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}
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fn tell() -> uint {
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#error("need 64-bit native calls for tell, sorry");
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fail;
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}
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fn flush() -> int { 0 }
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}
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resource fd_res(fd: fd_t) { libc::close(fd); }
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fn fd_writer(fd: fd_t, cleanup: bool) -> writer {
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if cleanup {
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{base: fd, cleanup: fd_res(fd)} as writer
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} else {
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fd as writer
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}
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}
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fn mk_file_writer(path: str, flags: [fileflag])
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-> result<writer, str> {
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#[cfg(target_os = "win32")]
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fn wb() -> c_int { (O_WRONLY | O_BINARY) as c_int }
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#[cfg(target_os = "linux")]
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#[cfg(target_os = "macos")]
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#[cfg(target_os = "freebsd")]
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fn wb() -> c_int { O_WRONLY as c_int }
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let mut fflags: c_int = wb();
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for vec::each(flags) {|f|
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alt f {
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append { fflags |= O_APPEND as c_int; }
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create { fflags |= O_CREAT as c_int; }
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truncate { fflags |= O_TRUNC as c_int; }
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no_flag { }
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}
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}
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let fd = os::as_c_charp(path) {|pathbuf|
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libc::open(pathbuf, fflags,
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(S_IRUSR | S_IWUSR) as c_int)
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};
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if fd < (0 as c_int) {
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result::err(#fmt("error opening %s: %s", path, os::last_os_error()))
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} else {
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result::ok(fd_writer(fd, true))
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}
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}
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fn u64_to_le_bytes<T>(n: u64, size: uint, f: fn([u8]/&) -> T) -> T {
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assert size <= 8u;
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alt size {
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1u { f([n as u8]/&) }
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2u { f([n as u8,
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(n >> 8) as u8]/&) }
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4u { f([n as u8,
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(n >> 8) as u8,
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(n >> 16) as u8,
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(n >> 24) as u8]/&) }
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8u { f([n as u8,
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(n >> 8) as u8,
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(n >> 16) as u8,
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(n >> 24) as u8,
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(n >> 32) as u8,
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(n >> 40) as u8,
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(n >> 48) as u8,
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(n >> 56) as u8]/&) }
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_ {
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let mut bytes: [u8] = [], i = size, n = n;
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while i > 0u {
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bytes += [(n & 255_u64) as u8];
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n >>= 8_u64;
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i -= 1u;
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}
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f(bytes)
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}
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}
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}
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fn u64_to_be_bytes<T>(n: u64, size: uint, f: fn([u8]/&) -> T) -> T {
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assert size <= 8u;
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alt size {
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1u { f([n as u8]/&) }
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2u { f([(n >> 8) as u8,
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n as u8]/&) }
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4u { f([(n >> 24) as u8,
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(n >> 16) as u8,
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(n >> 8) as u8,
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n as u8]/&) }
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8u { f([(n >> 56) as u8,
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(n >> 48) as u8,
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(n >> 40) as u8,
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(n >> 32) as u8,
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(n >> 24) as u8,
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(n >> 16) as u8,
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(n >> 8) as u8,
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n as u8]/&) }
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_ {
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let mut bytes: [u8] = [];
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let mut i = size;
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while i > 0u {
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let shift = ((i - 1u) * 8u) as u64;
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bytes += [(n >> shift) as u8];
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i -= 1u;
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}
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f(bytes)
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}
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}
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}
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fn u64_from_be_bytes(data: [u8], start: uint, size: uint) -> u64 {
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let mut sz = size;
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assert (sz <= 8u);
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let mut val = 0_u64;
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let mut pos = start;
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while sz > 0u {
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sz -= 1u;
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val += (data[pos] as u64) << ((sz * 8u) as u64);
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pos += 1u;
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}
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ret val;
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}
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impl writer_util for writer {
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fn write_char(ch: char) {
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if ch as uint < 128u {
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self.write([ch as u8]);
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} else {
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self.write_str(str::from_char(ch));
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}
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}
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fn write_str(s: str/&) { str::byte_slice(s) {|v| self.write(v); } }
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fn write_line(s: str/&) {
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self.write_str(s);
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self.write_str("\n"/&);
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}
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fn write_int(n: int) { self.write_str(int::to_str(n, 10u)); }
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fn write_uint(n: uint) { self.write_str(uint::to_str(n, 10u)); }
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fn write_le_uint(n: uint, size: uint) {
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u64_to_le_bytes(n as u64, size) {|v| self.write(v); }
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}
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fn write_le_int(n: int, size: uint) {
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u64_to_le_bytes(n as u64, size) {|v| self.write(v); }
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}
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fn write_be_uint(n: uint, size: uint) {
|
|
u64_to_be_bytes(n as u64, size) {|v| self.write(v); }
|
|
}
|
|
fn write_be_int(n: int, size: uint) {
|
|
u64_to_be_bytes(n as u64, size) {|v| self.write(v); }
|
|
}
|
|
fn write_be_u64(n: u64) {
|
|
u64_to_be_bytes(n, 8u) {|v| self.write(v); }
|
|
}
|
|
fn write_be_u32(n: u32) {
|
|
u64_to_be_bytes(n as u64, 4u) {|v| self.write(v); }
|
|
}
|
|
fn write_be_u16(n: u16) {
|
|
u64_to_be_bytes(n as u64, 2u) {|v| self.write(v); }
|
|
}
|
|
fn write_be_i64(n: i64) {
|
|
u64_to_be_bytes(n as u64, 8u) {|v| self.write(v); }
|
|
}
|
|
fn write_be_i32(n: i32) {
|
|
u64_to_be_bytes(n as u64, 4u) {|v| self.write(v); }
|
|
}
|
|
fn write_be_i16(n: i16) {
|
|
u64_to_be_bytes(n as u64, 2u) {|v| self.write(v); }
|
|
}
|
|
fn write_le_u64(n: u64) {
|
|
u64_to_le_bytes(n, 8u) {|v| self.write(v); }
|
|
}
|
|
fn write_le_u32(n: u32) {
|
|
u64_to_le_bytes(n as u64, 4u) {|v| self.write(v); }
|
|
}
|
|
fn write_le_u16(n: u16) {
|
|
u64_to_le_bytes(n as u64, 2u) {|v| self.write(v); }
|
|
}
|
|
fn write_le_i64(n: i64) {
|
|
u64_to_le_bytes(n as u64, 8u) {|v| self.write(v); }
|
|
}
|
|
fn write_le_i32(n: i32) {
|
|
u64_to_le_bytes(n as u64, 4u) {|v| self.write(v); }
|
|
}
|
|
fn write_le_i16(n: i16) {
|
|
u64_to_le_bytes(n as u64, 2u) {|v| self.write(v); }
|
|
}
|
|
|
|
fn write_u8(n: u8) { self.write([n]/&) }
|
|
}
|
|
|
|
fn file_writer(path: str, flags: [fileflag]) -> result<writer, str> {
|
|
result::chain(mk_file_writer(path, flags), { |w| result::ok(w)})
|
|
}
|
|
|
|
|
|
// FIXME: fileflags // #2004
|
|
fn buffered_file_writer(path: str) -> result<writer, str> {
|
|
let f = os::as_c_charp(path) {|pathbuf|
|
|
os::as_c_charp("w") {|modebuf|
|
|
libc::fopen(pathbuf, modebuf)
|
|
}
|
|
};
|
|
ret if f as uint == 0u { result::err("error opening " + path) }
|
|
else { result::ok(FILE_writer(f, true)) }
|
|
}
|
|
|
|
// FIXME it would be great if this could be a const
|
|
// FIXME why are these different from the way stdin() is implemented?
|
|
// #2004
|
|
fn stdout() -> writer { fd_writer(libc::STDOUT_FILENO as c_int, false) }
|
|
fn stderr() -> writer { fd_writer(libc::STDERR_FILENO as c_int, false) }
|
|
|
|
fn print(s: str) { stdout().write_str(s); }
|
|
fn println(s: str) { stdout().write_line(s); }
|
|
|
|
type mem_buffer = @{mut buf: [mut u8],
|
|
mut pos: uint};
|
|
|
|
impl of writer for mem_buffer {
|
|
fn write(v: [const u8]/&) {
|
|
// Fast path.
|
|
if self.pos == vec::len(self.buf) {
|
|
for vec::each(v) {|b| self.buf += [mut b]; }
|
|
self.pos += vec::len(v);
|
|
ret;
|
|
}
|
|
// FIXME: Optimize: These should be unique pointers. // #2004
|
|
let vlen = vec::len(v);
|
|
let mut vpos = 0u;
|
|
while vpos < vlen {
|
|
let b = v[vpos];
|
|
if self.pos == vec::len(self.buf) {
|
|
self.buf += [mut b];
|
|
} else { self.buf[self.pos] = b; }
|
|
self.pos += 1u;
|
|
vpos += 1u;
|
|
}
|
|
}
|
|
fn seek(offset: int, whence: seek_style) {
|
|
let pos = self.pos;
|
|
let len = vec::len(self.buf);
|
|
self.pos = seek_in_buf(offset, pos, len, whence);
|
|
}
|
|
fn tell() -> uint { self.pos }
|
|
fn flush() -> int { 0 }
|
|
}
|
|
|
|
fn mem_buffer() -> mem_buffer {
|
|
@{mut buf: [mut], mut pos: 0u}
|
|
}
|
|
fn mem_buffer_writer(b: mem_buffer) -> writer { b as writer }
|
|
fn mem_buffer_buf(b: mem_buffer) -> [u8] { vec::from_mut(b.buf) }
|
|
fn mem_buffer_str(b: mem_buffer) -> str {
|
|
let b_ = vec::from_mut(b.buf);
|
|
str::from_bytes(b_)
|
|
}
|
|
|
|
fn with_str_writer(f: fn(writer)) -> str {
|
|
let buf = mem_buffer();
|
|
let wr = mem_buffer_writer(buf);
|
|
f(wr);
|
|
io::mem_buffer_str(buf)
|
|
}
|
|
|
|
fn with_buf_writer(f: fn(writer)) -> [u8] {
|
|
let buf = mem_buffer();
|
|
let wr = mem_buffer_writer(buf);
|
|
f(wr);
|
|
io::mem_buffer_buf(buf)
|
|
}
|
|
|
|
// Utility functions
|
|
fn seek_in_buf(offset: int, pos: uint, len: uint, whence: seek_style) ->
|
|
uint {
|
|
let mut bpos = pos as int;
|
|
let blen = len as int;
|
|
alt whence {
|
|
seek_set { bpos = offset; }
|
|
seek_cur { bpos += offset; }
|
|
seek_end { bpos = blen + offset; }
|
|
}
|
|
if bpos < 0 { bpos = 0; } else if bpos > blen { bpos = blen; }
|
|
ret bpos as uint;
|
|
}
|
|
|
|
fn read_whole_file_str(file: str) -> result<str, str> {
|
|
result::chain(read_whole_file(file), { |bytes|
|
|
result::ok(str::from_bytes(bytes))
|
|
})
|
|
}
|
|
|
|
// FIXME implement this in a low-level way. Going through the abstractions is
|
|
// pointless. // #2004
|
|
fn read_whole_file(file: str) -> result<[u8], str> {
|
|
result::chain(file_reader(file), { |rdr|
|
|
result::ok(rdr.read_whole_stream())
|
|
})
|
|
}
|
|
|
|
// fsync related
|
|
|
|
mod fsync {
|
|
|
|
enum level {
|
|
// whatever fsync does on that platform
|
|
fsync,
|
|
|
|
// fdatasync on linux, similiar or more on other platforms
|
|
fdatasync,
|
|
|
|
// full fsync
|
|
//
|
|
// You must additionally sync the parent directory as well!
|
|
fullfsync,
|
|
}
|
|
|
|
|
|
// Resource of artifacts that need to fsync on destruction
|
|
resource res<t>(arg: arg<t>) {
|
|
alt arg.opt_level {
|
|
option::none { }
|
|
option::some(level) {
|
|
// fail hard if not succesful
|
|
assert(arg.fsync_fn(arg.val, level) != -1);
|
|
}
|
|
}
|
|
}
|
|
|
|
type arg<t> = {
|
|
val: t,
|
|
opt_level: option<level>,
|
|
fsync_fn: fn@(t, level) -> int
|
|
};
|
|
|
|
// fsync file after executing blk
|
|
// FIXME find better way to create resources within lifetime of outer res
|
|
// #2004
|
|
fn FILE_res_sync(&&file: FILE_res, opt_level: option<level>,
|
|
blk: fn(&&res<*libc::FILE>)) {
|
|
blk(res({
|
|
val: *file, opt_level: opt_level,
|
|
fsync_fn: fn@(&&file: *libc::FILE, l: level) -> int {
|
|
ret os::fsync_fd(libc::fileno(file), l) as int;
|
|
}
|
|
}));
|
|
}
|
|
|
|
// fsync fd after executing blk
|
|
fn fd_res_sync(&&fd: fd_res, opt_level: option<level>,
|
|
blk: fn(&&res<fd_t>)) {
|
|
blk(res({
|
|
val: *fd, opt_level: opt_level,
|
|
fsync_fn: fn@(&&fd: fd_t, l: level) -> int {
|
|
ret os::fsync_fd(fd, l) as int;
|
|
}
|
|
}));
|
|
}
|
|
|
|
// Type of objects that may want to fsync
|
|
iface t { fn fsync(l: level) -> int; }
|
|
|
|
// Call o.fsync after executing blk
|
|
fn obj_sync(&&o: t, opt_level: option<level>, blk: fn(&&res<t>)) {
|
|
blk(res({
|
|
val: o, opt_level: opt_level,
|
|
fsync_fn: fn@(&&o: t, l: level) -> int { ret o.fsync(l); }
|
|
}));
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
|
|
#[test]
|
|
fn test_simple() {
|
|
let tmpfile: str = "tmp/lib-io-test-simple.tmp";
|
|
log(debug, tmpfile);
|
|
let frood: str = "A hoopy frood who really knows where his towel is.";
|
|
log(debug, frood);
|
|
{
|
|
let out: io::writer =
|
|
result::get(
|
|
io::file_writer(tmpfile, [io::create, io::truncate]));
|
|
out.write_str(frood);
|
|
}
|
|
let inp: io::reader = result::get(io::file_reader(tmpfile));
|
|
let frood2: str = inp.read_c_str();
|
|
log(debug, frood2);
|
|
assert (str::eq(frood, frood2));
|
|
}
|
|
|
|
#[test]
|
|
fn test_readchars_empty() {
|
|
let inp : io::reader = io::str_reader("");
|
|
let res : [char] = inp.read_chars(128u);
|
|
assert(vec::len(res) == 0u);
|
|
}
|
|
|
|
#[test]
|
|
fn test_readchars_wide() {
|
|
let wide_test = "生锈的汤匙切肉汤hello生锈的汤匙切肉汤";
|
|
let ivals : [int] = [
|
|
29983, 38152, 30340, 27748,
|
|
21273, 20999, 32905, 27748,
|
|
104, 101, 108, 108, 111,
|
|
29983, 38152, 30340, 27748,
|
|
21273, 20999, 32905, 27748];
|
|
fn check_read_ln(len : uint, s: str, ivals: [int]) {
|
|
let inp : io::reader = io::str_reader(s);
|
|
let res : [char] = inp.read_chars(len);
|
|
if (len <= vec::len(ivals)) {
|
|
assert(vec::len(res) == len);
|
|
}
|
|
assert(vec::slice(ivals, 0u, vec::len(res)) ==
|
|
vec::map(res, {|x| x as int}));
|
|
}
|
|
let mut i = 0u;
|
|
while i < 8u {
|
|
check_read_ln(i, wide_test, ivals);
|
|
i += 1u;
|
|
}
|
|
// check a long read for good measure
|
|
check_read_ln(128u, wide_test, ivals);
|
|
}
|
|
|
|
#[test]
|
|
fn test_readchar() {
|
|
let inp : io::reader = io::str_reader("生");
|
|
let res : char = inp.read_char();
|
|
assert(res as int == 29983);
|
|
}
|
|
|
|
#[test]
|
|
fn test_readchar_empty() {
|
|
let inp : io::reader = io::str_reader("");
|
|
let res : char = inp.read_char();
|
|
assert(res as int == -1);
|
|
}
|
|
|
|
#[test]
|
|
fn file_reader_not_exist() {
|
|
alt io::file_reader("not a file") {
|
|
result::err(e) {
|
|
assert e == "error opening not a file";
|
|
}
|
|
result::ok(_) { fail; }
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn file_writer_bad_name() {
|
|
alt io::file_writer("?/?", []) {
|
|
result::err(e) {
|
|
assert str::starts_with(e, "error opening ?/?");
|
|
}
|
|
result::ok(_) { fail; }
|
|
}
|
|
}
|
|
|
|
#[test]
|
|
fn buffered_file_writer_bad_name() {
|
|
alt io::buffered_file_writer("?/?") {
|
|
result::err(e) {
|
|
assert e == "error opening ?/?";
|
|
}
|
|
result::ok(_) { fail; }
|
|
}
|
|
}
|
|
}
|
|
|
|
//
|
|
// Local Variables:
|
|
// mode: rust
|
|
// fill-column: 78;
|
|
// indent-tabs-mode: nil
|
|
// c-basic-offset: 4
|
|
// buffer-file-coding-system: utf-8-unix
|
|
// End:
|
|
//
|