if from < 0 then
count += from
- if count < 0 then return ""
+ if count <= 0 then return ""
from = 0
end
end
redef fun substring(from, count) do
+ var ln = _length
+ if count <= 0 then return ""
+ if (count + from) > ln then count = ln - from
if count <= 0 then return ""
-
if from < 0 then
count += from
- if count < 0 then return ""
+ if count <= 0 then return ""
from = 0
end
- var ln = _length
- if (count + from) > ln then count = ln - from
return new ASCIIFlatString.full_data(_items, count, from + _first_byte, count)
end
is_dirty = true
_bytelen = 0
_length = 0
- if written then reset
+ if written then
+ _capacity = 16
+ reset
+ end
end
redef fun empty do return new Buffer
return new FlatBuffer.with_infos(r_items, byte_length, byte_length, count)
end
+ redef fun append_substring_impl(s, from, length) do
+ if length <= 0 then return
+ if not s isa FlatText then
+ super
+ return
+ end
+ var bytest = s.char_to_byte_index(from)
+ var bytend = s.char_to_byte_index(from + length - 1)
+ var btln = bytend - bytest + 1
+ enlarge(btln + _bytelen)
+ s._items.copy_to(_items, btln, bytest, _bytelen)
+ _bytelen += btln
+ _length += length
+ end
+
redef fun reverse
do
written = false
#
# Very unsafe, make sure to have room for this char prior to calling this function.
private fun set_char_at(pos: Int, c: Char) do
- if c.code_point < 128 then
- self[pos] = c.code_point.to_b
+ var cp = c.code_point
+ if cp < 128 then
+ self[pos] = cp.to_b
return
end
var ln = c.u8char_len
- native_set_char(pos, c, ln)
- end
-
- private fun native_set_char(pos: Int, c: Char, ln: Int) `{
- char* dst = self + pos;
- switch(ln){
- case 1:
- dst[0] = c;
- break;
- case 2:
- dst[0] = 0xC0 | ((c & 0x7C0) >> 6);
- dst[1] = 0x80 | (c & 0x3F);
- break;
- case 3:
- dst[0] = 0xE0 | ((c & 0xF000) >> 12);
- dst[1] = 0x80 | ((c & 0xFC0) >> 6);
- dst[2] = 0x80 | (c & 0x3F);
- break;
- case 4:
- dst[0] = 0xF0 | ((c & 0x1C0000) >> 18);
- dst[1] = 0x80 | ((c & 0x3F000) >> 12);
- dst[2] = 0x80 | ((c & 0xFC0) >> 6);
- dst[3] = 0x80 | (c & 0x3F);
- break;
- }
- `}
+ if ln == 2 then
+ self[pos] = (0xC0 | ((cp & 0x7C0) >> 6)).to_b
+ self[pos + 1] = (0x80 | (cp & 0x3F)).to_b
+ else if ln == 3 then
+ self[pos] = (0xE0 | ((cp & 0xF000) >> 12)).to_b
+ self[pos + 1] = (0x80 | ((cp & 0xFC0) >> 6)).to_b
+ self[pos + 2] = (0x80 | (cp & 0x3F)).to_b
+ else if ln == 4 then
+ self[pos] = (0xF0 | ((cp & 0x1C0000) >> 18)).to_b
+ self[pos + 1] = (0x80 | ((cp & 0x3F000) >> 12)).to_b
+ self[pos + 2] = (0x80 | ((cp & 0xFC0) >> 6)).to_b
+ self[pos + 3] = (0x80 | (cp & 0x3F)).to_b
+ end
+ end
end
redef class Int