Feature #6643 » io-seek-whence-symbol.patch
io.c (working copy) | ||
---|---|---|
static ID id_write, id_read, id_getc, id_flush, id_readpartial, id_set_encoding;
|
||
static VALUE sym_mode, sym_perm, sym_extenc, sym_intenc, sym_encoding, sym_open_args;
|
||
static VALUE sym_textmode, sym_binmode, sym_autoclose;
|
||
static VALUE sym_set, sym_cur, sym_end;
|
||
struct argf {
|
||
VALUE filename, current_file;
|
||
... | ... | |
return INT2FIX(0);
|
||
}
|
||
static int
|
||
interpret_seek_whence(VALUE vwhence)
|
||
{
|
||
if (vwhence == sym_set)
|
||
return SEEK_SET;
|
||
if (vwhence == sym_cur)
|
||
return SEEK_CUR;
|
||
if (vwhence == sym_end)
|
||
return SEEK_END;
|
||
return NUM2INT(vwhence);
|
||
}
|
||
/*
|
||
* call-seq:
|
||
* ios.seek(amount, whence=IO::SEEK_SET) -> 0
|
||
... | ... | |
* Seeks to a given offset <i>anInteger</i> in the stream according to
|
||
* the value of <i>whence</i>:
|
||
*
|
||
* IO::SEEK_CUR | Seeks to _amount_ plus current position
|
||
* --------------+----------------------------------------------------
|
||
* IO::SEEK_END | Seeks to _amount_ plus end of stream (you probably
|
||
* | want a negative value for _amount_)
|
||
* --------------+----------------------------------------------------
|
||
* IO::SEEK_SET | Seeks to the absolute location given by _amount_
|
||
* :cur or IO::SEEK_CUR | Seeks to _amount_ plus current position
|
||
* ----------------------+--------------------------------------------------
|
||
* :end or IO::SEEK_END | Seeks to _amount_ plus end of stream (you
|
||
* | probably want a negative value for _amount_)
|
||
* ----------------------+--------------------------------------------------
|
||
* :set or IO::SEEK_SET | Seeks to the absolute location given by _amount_
|
||
*
|
||
* Example:
|
||
*
|
||
... | ... | |
int whence = SEEK_SET;
|
||
if (rb_scan_args(argc, argv, "11", &offset, &ptrname) == 2) {
|
||
whence = NUM2INT(ptrname);
|
||
whence = interpret_seek_whence(ptrname);
|
||
}
|
||
return rb_io_seek(io, offset, whence);
|
||
... | ... | |
off_t pos;
|
||
if (rb_scan_args(argc, argv, "11", &offset, &ptrname) == 2) {
|
||
whence = NUM2INT(ptrname);
|
||
whence = interpret_seek_whence(ptrname);
|
||
}
|
||
pos = NUM2OFFT(offset);
|
||
GetOpenFile(io, fptr);
|
||
... | ... | |
sym_willneed = ID2SYM(rb_intern("willneed"));
|
||
sym_dontneed = ID2SYM(rb_intern("dontneed"));
|
||
sym_noreuse = ID2SYM(rb_intern("noreuse"));
|
||
sym_set = ID2SYM(rb_intern("set"));
|
||
sym_cur = ID2SYM(rb_intern("cur"));
|
||
sym_end = ID2SYM(rb_intern("end"));
|
||
}
|
test/ruby/test_io.rb (working copy) | ||
---|---|---|
}
|
||
end
|
||
def test_seek_symwhence
|
||
make_tempfile {|t|
|
||
open(t.path) { |f|
|
||
f.seek(9, :set)
|
||
assert_equal("az\n", f.read)
|
||
}
|
||
open(t.path) { |f|
|
||
f.seek(-4, :end)
|
||
assert_equal("baz\n", f.read)
|
||
}
|
||
open(t.path) { |f|
|
||
assert_equal("foo\n", f.gets)
|
||
f.seek(2, :cur)
|
||
assert_equal("r\nbaz\n", f.read)
|
||
}
|
||
}
|
||
end
|
||
def test_sysseek
|
||
t = make_tempfile
|
||