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1 | \ ========== Copyright Header Begin ========================================== |
2 | \ | |
3 | \ Hypervisor Software File: fixvoc.fth | |
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41 | \ ========== Copyright Header End ============================================ | |
42 | \ fixvoc.fth 2.3 93/11/01 | |
43 | \ Copyright 1985-1990 Bradley Forthware | |
44 | ||
45 | only forth meta also forth also definitions | |
46 | \ Nasty kludge to resolve the to pointer to the does> clause of vocabulary | |
47 | \ within "forth". The problem is that the code field of "forth" contains | |
48 | \ a call instruction to the does> clause of vocabulary. This call is a | |
49 | \ forward reference which cannot be resolved in the same way as compiled | |
50 | \ addresses. | |
51 | ||
52 | : used-t ( definer-acf child-acf -- ) | |
53 | \t32-t \ Construct a call instruction to the definer acf | |
54 | \t32-t 2dup - n->l 2 >> h# 4000.0000 or ( definer-acf child-acf call-instr ) | |
55 | \t32-t swap [ also meta ] l!-t [ previous ] ( definer-acf ) drop | |
56 | \t16-t [ also meta ] token!-t [ previous ] | |
57 | ; | |
58 | ||
59 | : fix-vocabularies ( -- ) | |
60 | [""] <vocabulary> also symbols find previous ( acf true | str false ) | |
61 | 0= abort" Can't find <vocabulary> in symbols" | |
62 | dup resolution@ >r ( acf ) ( RS: <vocabulary>-adr ) | |
63 | dup first-occurrence@ ( acf occurrence ) | |
64 | \ Don't let fixall muck with this entry later | |
65 | 0 rot first-occurrence! ( occurrence ) | |
66 | begin another-occurrence? while ( occurrence ) | |
67 | dup [ meta ] rlink@-t [ forth ] swap ( next-occurrence occurrence ) | |
68 | r@ swap used-t | |
69 | repeat | |
70 | r> drop | |
71 | ; |