hex.input_ptr_line

Reads bytes from input into the pointed buffer, until a '\n' or a 0-byte (EOF); writes the byte count into len[:w/4].

Signature

def input_ptr_line ptr, len @ loop, store, finish, wptr, bytebuf, nl, end { ... }

Defined in hex/strings.fj — lines 9–27 (view on GitHub).

Complexity

• Time: len(w(0.75@+5) + 39@+79)

• Space: w(2.25@+44) + 34@+381

See the complexity glossary for what @, w, dw, dbit, n mean.

Requires init

The following must be initialised before this macro is invoked:

• hex.init and stl.ptr_init (or stl.startup_and_init_all).

Source

Click to view the macro body

def input_ptr_line ptr, len @ loop, store, finish, wptr, bytebuf, nl, end {
    .mov w/4, wptr, ptr
    .zero w/4, len
  loop:
    .input bytebuf
    .if0 2, bytebuf, finish                 // 0-byte = EOF
    .cmp 2, bytebuf, nl, store, finish, store   // == '\n' -> stop
  store:
    .write_byte_and_inc wptr, bytebuf
    .inc w/4, len
    ;loop
  finish:
    ;end

  wptr:    .vec w/4
  bytebuf: .vec 2
  nl:      .vec 2, '\n'
  end:
}

Depends on

• hex.cmp/6

• hex.if0/3

• hex.inc

• hex.input/1

• hex.mov/3

• hex.write_byte_and_inc

• hex.zero/2

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Next: hex.print_ptr_text →