162 lines
3.5 KiB
Rust
162 lines
3.5 KiB
Rust
import std.os.libc;
|
|
import std._str;
|
|
import std._vec;
|
|
|
|
|
|
type stdio_reader = unsafe obj {
|
|
fn getc() -> int;
|
|
};
|
|
|
|
fn new_stdio_reader(str path) -> stdio_reader {
|
|
unsafe obj stdio_FILE_reader(os.libc.FILE f) {
|
|
fn getc() -> int {
|
|
ret os.libc.fgetc(f);
|
|
}
|
|
drop {
|
|
os.libc.fclose(f);
|
|
}
|
|
}
|
|
ret stdio_FILE_reader(os.libc.fopen(_str.buf(path),
|
|
_str.buf("r")));
|
|
}
|
|
|
|
|
|
type buf_reader = unsafe obj {
|
|
fn read() -> vec[u8];
|
|
};
|
|
|
|
type buf_writer = unsafe obj {
|
|
fn write(vec[u8] v);
|
|
};
|
|
|
|
fn default_bufsz() -> uint {
|
|
ret 4096u;
|
|
}
|
|
|
|
fn new_buf() -> vec[u8] {
|
|
ret _vec.alloc[u8](default_bufsz());
|
|
}
|
|
|
|
fn new_buf_reader(str path) -> buf_reader {
|
|
|
|
unsafe obj fd_buf_reader(int fd, mutable vec[u8] buf) {
|
|
|
|
fn read() -> vec[u8] {
|
|
|
|
// Ensure our buf is singly-referenced.
|
|
if (_vec.rustrt.refcount[u8](buf) != 1u) {
|
|
buf = new_buf();
|
|
}
|
|
|
|
auto len = _vec.len[u8](buf);
|
|
auto vbuf = _vec.buf[u8](buf);
|
|
auto count = os.libc.read(fd, vbuf, len);
|
|
|
|
if (count < 0) {
|
|
log "error filling buffer";
|
|
log sys.rustrt.last_os_error();
|
|
fail;
|
|
} else {
|
|
ret buf;
|
|
}
|
|
}
|
|
|
|
drop {
|
|
os.libc.close(fd);
|
|
}
|
|
}
|
|
|
|
auto fd = os.libc.open(_str.buf(path),
|
|
os.libc_constants.O_RDONLY() |
|
|
os.libc_constants.O_BINARY(),
|
|
0u);
|
|
|
|
if (fd < 0) {
|
|
log "error opening file for reading";
|
|
log sys.rustrt.last_os_error();
|
|
fail;
|
|
}
|
|
ret fd_buf_reader(fd, new_buf());
|
|
}
|
|
|
|
type fileflag = tag(append(), create(), truncate());
|
|
|
|
fn new_buf_writer(str path, vec[fileflag] flags) -> buf_writer {
|
|
|
|
unsafe obj fd_buf_writer(int fd) {
|
|
|
|
fn write(vec[u8] v) {
|
|
auto len = _vec.len[u8](v);
|
|
auto count = 0u;
|
|
auto vbuf;
|
|
while (count < len) {
|
|
vbuf = _vec.buf_off[u8](v, count);
|
|
auto nout = os.libc.write(fd, vbuf, len);
|
|
if (nout < 0) {
|
|
log "error dumping buffer";
|
|
log sys.rustrt.last_os_error();
|
|
fail;
|
|
}
|
|
count += nout as uint;
|
|
}
|
|
}
|
|
|
|
drop {
|
|
os.libc.close(fd);
|
|
}
|
|
}
|
|
|
|
let int fflags =
|
|
os.libc_constants.O_WRONLY() |
|
|
os.libc_constants.O_BINARY();
|
|
|
|
for (fileflag f in flags) {
|
|
alt (f) {
|
|
case (append()) { fflags |= os.libc_constants.O_APPEND(); }
|
|
case (create()) { fflags |= os.libc_constants.O_CREAT(); }
|
|
case (truncate()) { fflags |= os.libc_constants.O_TRUNC(); }
|
|
}
|
|
}
|
|
|
|
auto fd = os.libc.open(_str.buf(path),
|
|
fflags,
|
|
os.libc_constants.S_IRUSR() |
|
|
os.libc_constants.S_IWUSR());
|
|
|
|
if (fd < 0) {
|
|
log "error opening file for writing";
|
|
log sys.rustrt.last_os_error();
|
|
fail;
|
|
}
|
|
ret fd_buf_writer(fd);
|
|
}
|
|
|
|
type writer =
|
|
unsafe obj {
|
|
fn write_str(str s);
|
|
fn write_int(int n);
|
|
fn write_uint(uint n);
|
|
};
|
|
|
|
fn file_writer(str path,
|
|
vec[fileflag] flags)
|
|
-> writer
|
|
{
|
|
unsafe obj fw(buf_writer out) {
|
|
fn write_str(str s) { out.write(_str.bytes(s)); }
|
|
fn write_int(int n) { out.write(_str.bytes(_int.to_str(n, 10u))); }
|
|
fn write_uint(uint n) { out.write(_str.bytes(_int.uto_str(n, 10u))); }
|
|
}
|
|
ret fw(new_buf_writer(path, flags));
|
|
}
|
|
|
|
//
|
|
// 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 .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
|
|
// End:
|
|
//
|