27 lines
1.1 KiB
Forth
27 lines
1.1 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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( Define more words that are usually in extra_opcodes.h )
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( Fill, Move )
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: cmove ( a a n -- ) for aft >r dup c@ r@ c! 1+ r> 1+ then next 2drop ;
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: cmove> ( a a n -- ) for aft 2dup swap r@ + c@ swap r@ + c! then next 2drop ;
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: fill ( a n ch -- ) swap for swap aft 2dup c! 1 + then next 2drop ;
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: erase ( a n -- ) 0 fill ; : blank ( a n -- ) bl fill ;
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( Compound words requiring conditionals )
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: min 2dup < if drop else nip then ;
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: max 2dup < if nip else drop then ;
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: abs ( n -- +n ) dup 0< if negate then ;
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