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