\ Copyright 2022 Bradley D. Nelson 
\ 
\ Licensed under the Apache License, Version 2.0 (the "License"); 
\ you may not use this file except in compliance with the License. 
\ You may obtain a copy of the License at 
\ 
\     http://www.apache.org/licenses/LICENSE-2.0 
\ 
\ Unless required by applicable law or agreed to in writing, software 
\ distributed under the License is distributed on an "AS IS" BASIS, 
\ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
\ See the License for the specific language governing permissions and 
\ limitations under the License. 
 
( Vocabulary for building C-style structures ) 
 
vocabulary structures   structures definitions 
 
variable last-align 
: typer ( align sz "name" ) create , , 
                            does> dup cell+ @ last-align ! @ ; 
1 1 typer i8 
2 2 typer i16 
4 4 typer i32 
cell 8 typer i64 
cell cell typer ptr 
long-size long-size typer long 
 
variable last-struct 
 
: struct ( "name" ) 1 0 typer latestxt >body last-struct ! ; 
: align-by ( a n -- a ) 1- dup >r + r> invert and ; 
: struct-align ( n -- ) 
  dup last-struct @ cell+ @ max last-struct @ cell+ ! 
  last-struct @ @ swap align-by last-struct @ ! ; 
: field ( n "name" ) 
  last-align @ struct-align 
  create last-struct @ @ , last-struct @ +! 
  does> @ + ; 
 
forth definitions 
 

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