another example

[rrq/rrqforth.git] / rrqforth.asm

diff --git a/rrqforth.asm b/rrqforth.asm
index f0ef63a248c087fb61bb38474fbe5faabbd0d879..18009d41bfba8f75f5b7afef2463f89988bf10e6 100644 (file)
--- a/rrqforth.asm
+++ b/rrqforth.asm
@@ -133,7 +133,12 @@ previous_word = 0
        pop rax
        jmp qword [rax]         ; goto code of that FORTH word (64 bit jump)
        
-       WORD p_exit, 'EXIT',fasm
+       WORD p_sysexit, 'EXIT',
+       ;; ( v -- )
+       ;; Terminate RRQFORTH with error code
+       dq sys_exit
+
+       WORD p_return, 'RETURN',fasm
        ;; ( -- ) ( R: addr -- )
        ;; Returns execution to the calling definition as per the
        ;; return stack.
@@ -161,10 +166,11 @@ include 'stack.asm'
 include 'math.asm'
 include 'logic.asm'
 include 'stdio.asm'
+include 'temp.asm'
 include 'compile.asm'
 
        WORD p_program_version,'PROGRAM_VERSION',dostring
-       STRING 'RRQ Forth version 0.1 - 2021-05-22',10
+       STRING 'RRQ Forth version 0.1 - 2021-06-05',10
 
        WORD p_stdin,'STDIN',dovalue
        ;; Initialised to hold a STREAM for fd 0
@@ -189,7 +195,7 @@ p_lparen_loop:
        cmp rax,1
        jne p_lparen_loop
        push rbx
-       push qword ')'
+       push p_lparen_rparen
        push 1
        DOFORTH p_strncmp
        pop rax
@@ -198,7 +204,8 @@ p_lparen_loop:
 p_lparen_exit:
        popr rsi
        next
-       
+p_lparen_rparen: db ')',0
+
 ;;; ******** The main entry point. ********
 ;;; This could be set up as a WORD but it isn't
 
@@ -238,6 +245,42 @@ main_is_verbose_loop:
 main_is_not_verbose:
        ret
 
+       WORD p_process_args_var,'PROCESS-ARGS-VAR',dovariable
+       ;; ( -- a )
+       ;; Two cells for iterating and load the main args
+p_process_args_ptr: dq 0
+p_process_args_end: dq 0
+       
+       WORD p_process_args,'PROCESS-ARGS',fasm
+       pushr rsi
+       mov rax,qword [p_args_DFA] ; args*
+       mov rbx,qword [rax] ; count
+       shl rbx,3
+       add rax,8
+       add rbx,rax ; end
+       mov qword [p_process_args_end],rbx
+       add rax,8
+       mov qword [p_process_args_ptr],rax
+p_process_args_loop:
+       mov rax,qword [p_process_args_ptr]
+       cmp rax,qword [p_process_args_end]
+       jge p_process_args_done
+       add qword [p_process_args_ptr],8
+       mov rax,qword [rax]
+       mov bl,[rax]
+       cmp bl,'-'
+       je p_process_args_loop
+       push rax
+       push rax
+       FORTH
+       dq p_strlen, p_load_file
+       BRANCH 0, p_quit_ERROR
+       ENDFORTH
+       jmp p_process_args_loop
+p_process_args_done:
+       popr rsi
+       next
+       
 ;;; This word is also the last word before syscalls
 last_forth_word:
        WORD p_quit,'QUIT',fasm
@@ -251,30 +294,24 @@ last_forth_word:
        push 10000
        DOFORTH p_stream
        pop qword [p_stdin_DFA] ; Assign STDIN
+       DOFORTH p_process_args
 
 p_quit_INITIALIZED:
        ;; Setup INPUT from STDIN
        FORTH
-       dq p_verboseQ
-       dq p_get
+       dq p_verboseQ, p_get
        BRANCH 0,p_quit_EVAL
-       dq p_program_version
-       dq p_tell
+       dq p_program_version, p_tell
 p_quit_EVAL:
        dq p_stdin, p_evaluate_stream
        BRANCH 0,p_quit_ERROR
-       dq p_false
-       dq sys_exit
+       dq p_false, sys_exit
 p_quit_ERROR:
        dq p_literal_string
        STRING 10,'*** Unknown word: '
        dq p_tell
-       dq p_this_word
-       dq p_2get
-       dq p_tell
-       dq p_literal_string
-       STRING 10
-       dq p_tell
+       dq p_this_word, p_2get, p_tell
+       dq p_nl, p_emit
        ENDFORTH
        mov rbp,RS_TOP          ; reset the return stack
        jmp p_quit_INITIALIZED