\ 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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