+p_literal_string_executing:
+ mov rax,qword [rsi]
+ add rsi,8
+ push rsi
+ push rax
+ add rsi,rax
+ next
+
+ WORD p_state,'STATE',dovariable
+ ;; Interpretation state (0=interpreting, 1=compiling)
+ dq 0
+
+ WORD p_left_bracket,'[',fasm,IMMEDIATE
+ ;; ( -- )
+ ;; Change state to interpreting state.
+ mov qword[p_state_DFA],0
+ next
+
+ WORD p_right_bracket,']',fasm
+ ;; ( -- )
+ ;; Change state to compilation state.
+ mov qword[p_state_DFA],1
+ next
+
+ WORD p_base,'BASE',dovariable
+ dq 10
+
+ WORD p_decimal,'DECIMAL',fasm
+ ;; ( -- )
+ ;; Set BASE to 10
+ mov qword [p_base_DFA],10
+ next
+
+ WORD p_hex,'HEX',fasm
+ ;; ( -- )
+ ;; Set BASE to 16
+ mov qword [p_base_DFA],16
+ next
+
+ WORD p_number,'NUMBER',fasm
+ ;; ( chars* n -- [ 0 ]/[ v 1 ] )
+ pushr rsi
+ pop rcx ; ( -- chars* )
+ pop rsi ; ( -- )
+ xor rdi,rdi ; value
+ mov rbx,1 ; sign (byte 0=0 means negative)
+ cmp qword [p_base_DFA],10
+ jne p_number_LOOP
+ cmp byte [rsi],'-'
+ jne p_number_LOOP
+ mov rbx,0
+ inc rsi
+ dec rcx
+ jle p_number_BAD
+p_number_LOOP:
+ dec rcx
+ jl p_number_DONE
+ xor rax,rax ; clearing
+ lodsb
+ cmp al,'0'
+ jl p_number_BAD
+ cmp al,'9'
+ jg p_number_ALPHA
+ sub al,'0'
+p_number_CONSUME:
+ mov r8,rax
+ mov rax,rdi
+ mul qword [p_base_DFA] ; uses rdx:rax
+ add rax,r8
+ mov rdi,rax
+ jmp p_number_LOOP
+p_number_ALPHA:
+ cmp al,'A'
+ jl p_number_BAD
+ cmp al,'Z'
+ jg p_number_alpha
+ sub al,'A'-10
+ cmp rax,qword [p_base_DFA]
+ jge p_number_BAD
+ jmp p_number_CONSUME
+p_number_alpha:
+ cmp al,'a'
+ jl p_number_BAD
+ cmp al,'z'
+ jg p_number_BAD
+ sub al,'a'-10
+ cmp rax,qword [p_base_DFA]
+ jge p_number_BAD
+ jmp p_number_CONSUME
+p_number_BAD:
+ push qword 0
+ popr rsi
+ next
+p_number_DONE:
+ cmp rbx,0
+ jne p_numper_POSITIVE
+ neg rdi
+p_numper_POSITIVE:
+ push rdi
+ push qword 1
+ popr rsi
+ next
+
+ WORD p_input,'INPUT',dovariable
+ ;; The current input stream for evaluate-stream
+ dq 0
+
+ WORD p_this_word,'THIS-WORD',dovariable
+ dq 0,0 ; ( n chars* )
+
+ WORD p_evaluate_stream,'EVALUATE-STREAM'
+ ;; ( stream* -- *?* flag )
+ ;; Execute the words from the given stream
+ ;; returns 1 if stream ends and 0 if an unknown word is found
+ dq p_input, p_get, p_gtR ; save old stream on R-stack
+ dq p_input, p_put
+p_evaluate_stream_PROMPT:
+ dq p_verboseQ, p_get
+ BRANCH 0,p_evaluate_stream_LOOP
+ dq p_depth, p_dot
+ dq p_literal_string
+ STRING '> '
+ dq p_tell
+ dq p_input, p_get
+ dq p_clear_stream
+p_evaluate_stream_LOOP:
+ dq p_input, p_get
+ dq p_read_word
+ dq p_dup
+ BRANCH 0,p_evaluate_stream_END ; branch if 0 on TOP
+ dq p_2dup, p_this_word, p_2put
+ dq p_find
+ dq p_dup
+ BRANCH 0,p_evaluate_stream_NOTWORD ; branch if 0 on TOP
+ dq p_state