;;; This file contains words dealing with word lists (vocabularies)
+;;;
+;;; CURRENT-WORDLIST (variable) points out "the current wordlist"
+;;; SYSCALLS is a wordl list
+;;; FORTH is a word list
+;;;
+;;; !! When a word list word is created, it gets added to the tail end
+;;; of the current word list as way of making all word list words be
+;;; present in all word lists. This is different to all other kinds of
+;;; words, which instead are added to the head end of the current word
+;;; list.
+;;;
+;;; !! A word list word is created, it is initialised to the head end
+;;; of the current word list. It will this be an extension to that
+;;; current word list.
+;;;
+;;; EMPTY-WORDLIST is a word list word for an empty word list. It thus
+;;; only contains word list words.
+;;;
+;;; WORDLIST ( "name" -- ) = start
- WORD p_wordlist,'WORDLIST',dovariable
- ;; VARIABLE WORDLIST is the currently active wordlist.
- dq last_word
+ WORD p_tfa2cfa,'TFA>CFA',fasm
+ ;; ( tfa -- cfa )
+ ;; Advance a word tfa pointer to the cfa field
+ mov rax,qword[rsp]
+ tfa2cfa rax
+ mov qword [rsp],rax
+ next
+
+ WORD p_tfa2dfa,'TFA>DFA',fasm
+ ;; ( tfa -- dfa )
+ ;; Advance a word tfa pointer to the dfa field
+ mov rax,qword[rsp]
+ tfa2dfa rax
+ mov qword [rsp],rax
+ next
+
+ WORD p_dfa2tfa,'DFA>TFA',fasm
+ ;; ( dfa -- tfa )
+ ;; Advance a word tfa pointer to the dfa field
+ mov rax,qword[rsp]
+ mov rax,qword [rax-24] ; tfa
+ mov qword [rsp],rax
+ next
+
+ WORD p_wordlist,'CURRENT-WORDLIST',dovariable
+ ;; CURRENT-WORDLIST points to cfa of the currently active wordlist.
+ dq p_forth_DFA
WORD p_words,'WORDS',fasm
;; ( -- )
;; Dump all words
pushr rsi
- push qword [p_wordlist_DFA]
+ mov rax,qword [p_wordlist_DFA] ; current wordlist word
+ mov rax,[rax] ; list start
+ sub rsp,8 ; use stack to hold ptr
p_words_LOOP:
- mov rax,qword [rsp]
+ mov qword [rsp],rax
cmp rax,0
je p_words_END
;; tfa>pfa
- add rax,9
- ;; pfa@ => ( chars* length)
- xor rbx,rbx
- mov bl,[rax]
- inc rax
+ tfa2pfa rax
push 1
- push rax
- push rbx
+ ;; pfa@ => ( chars* length)
+ pushpname rax
DOFORTH sys_write
pop rax ; ignore errors
- push 10
+ push qword 10
DOFORTH p_emit
mov rax,qword [rsp]
mov rax,qword [rax]
- mov qword [rsp],rax
jmp p_words_LOOP
p_words_END:
next
WORD p_find,'FIND'
- ;; ( chars length -- [ chars 0 | cfa 1 )
+ ;; ( chars length -- [ 0 ]|[ tfa ] )
;; Search the current wordlists for the given pname
+ pushr rsi
mov rcx,[p_wordlist_DFA]
-p_find_loop:
- cmp rcx,0
- je p_find_done
+ mov rcx,qword [rcx]
mov rbx,[rsp]
mov rax,[rsp+8]
- cmp bl,byte [rcx+10]
+p_find_loop:
+ cmp rcx,0
+ je p_find_notfound
+ cmp rbx,qword [rcx+16] ; compare lengths
jne p_find_nextword
- push rcx
+ push rcx ; save tfa for later
;; check word
push rax
- push rcx+11
+ tfa2pname rcx
+ push rcx
push rbx
DOFORTH p_strncmp
pop rax ; return value
- pop rcx
+ pop rcx ; restore tfa
cmp rax,0
- je p_find_done
+ je p_find_found
+ mov rbx,[rsp]
+ mov rax,[rsp+8]
p_find_nextword:
mov rcx,[rcx]
jmp p_find_loop
+p_find_notfound:
+ xor rcx,rcx
p_find_found:
- mov qword [rsp+8],rcx ; replace chars with tfa
- mov rcx,1
-p_find_done:
- push rcx
+ add rsp,8
+ mov qword [rsp],rcx ; replace with tfa / 0
+ popr rsi
next