Function appendLz [src]

Fetch an LZ sequence (length, distance) from inside the buffer

Prototype

pub fn appendLz( self: *CircularBuffer, gpa: Allocator, len: usize, dist: usize, writer: *Writer, ) !void

Parameters

self: *CircularBuffergpa: Allocatorlen: usizedist: usizewriter: *Writer

Source

  pub fn appendLz(
    self: *CircularBuffer,
    gpa: Allocator,
    len: usize,
    dist: usize,
    writer: *Writer,
) !void {
    if (dist > self.dict_size or dist > self.len) {
        return error.CorruptInput;
    }

    var offset = (self.dict_size + self.cursor - dist) % self.dict_size;
    var i: usize = 0;
    while (i < len) : (i += 1) {
        const x = self.get(offset);
        try self.appendLiteral(gpa, x, writer);
        offset += 1;
        if (offset == self.dict_size) {
            offset = 0;
        }
    }
}  