hex.print_ptr_line

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

A terminating '\n' is printed too (a terminating 0-byte is not); either way len excludes it.

Signature

def print_ptr_line ptr, len @ loop, doprint, donl, stop, pptr, bytebuf, nl, end { ... }

Defined in hex/strings.fj — lines 57–79 (view on GitHub).

Complexity

• Time: len(w(0.75@+5) + 29@+41)

• Space: w(2.25@+45) + 28@+220

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 print_ptr_line ptr, len @ loop, doprint, donl, stop, pptr, bytebuf, nl, end {
    .mov w/4, pptr, ptr
    .zero w/4, len
  loop:
    .read_byte bytebuf, pptr
    .if0 2, bytebuf, stop                   // 0-byte terminator: stop (no newline)
    .cmp 2, bytebuf, nl, doprint, donl, doprint   // '\n' terminator: print it, then stop
  doprint:
    .print bytebuf
    .ptr_inc pptr
    .inc w/4, len
    ;loop
  donl:
    stl.output '\n'
    ;stop
  stop:
    ;end

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

Depends on

• hex.cmp/6

• hex.if0/3

• hex.inc

• hex.mov/3

• hex.print/1

• hex.ptr_inc

• hex.read_byte/2

• hex.zero/2

• stl.output

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