;;; 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_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:
inc rdx
p_strncmp_loop:
dec rdx
- je p_strncmp_end
+ jle p_strncmp_end
mov cl,[rax]
inc rax
sub cl,[rbx]
push rcx
next
- WORD p_find,'FIND'
- ;; ( chars length -- [ chars 0 | cfa 1 )
+ WORD p_find,'FIND',fasm
+ ;; ( chars* length -- [ chars* length 0 ]|[ tfa ] )
;; Search the current wordlists for the given pname
+ pushr rsi
mov rcx,[p_wordlist_DFA]
+ mov rcx,qword [rcx] ; use rcx for word list traversing
+ mov rbx,qword [rsp] ; rbx is input length
+ mov rsi,qword [rsp+8] ; rsi is input chars*
p_find_loop:
cmp rcx,0
- je p_find_done
- mov rbx,[rsp]
- mov rax,[rsp+8]
- cmp bl,byte [rcx+10]
- jne p_find_nextword
- push rcx
+ je p_find_notfound ; jump at end of word list
+ cmp rbx,qword [rcx+24] ; compare lengths
+ jne p_find_nextword ; jump on length mismatch
+ push rcx ; save tfa for later
;; check word
- push rax
- push rcx+11
- push rbx
- DOFORTH p_strncmp
- pop rax ; return value
- pop rcx
+ push rsi ; input chars
+ tfa2pname rcx
+ push rcx ; word pname
+ push rbx ; length
+ DOFORTH p_strncmp ; ( s1* s2 n -- v )
+ pop rax ; return value v
+ pop rcx ; restore tfa
cmp rax,0
- je p_find_done
+ je p_find_found
+ mov rbx,qword [rsp]
+ mov rsi,qword [rsp+8]
p_find_nextword:
- mov rcx,[rcx]
+ mov rcx,qword [rcx]
jmp p_find_loop
+p_find_notfound:
+ xor rcx,rcx
+ sub rsp,16
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