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Implemented includes in asma

This commit is contained in:
Andrew Alderwick 2021-10-06 06:14:18 +01:00
parent d73d25f2c1
commit 755ccf5665
1 changed files with 74 additions and 41 deletions
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115
projects/software/asma.tal
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@ -99,6 +99,9 @@
;asma/src-filename LDA2 ;asma-assemble-file-pass JSR2 ;asma/src-filename LDA2 ;asma-assemble-file-pass JSR2
asma-IF-ERROR ,&error JCN asma-IF-ERROR ,&error JCN
( flush output buffer )
;asma-output/ptr LDA2 ;asma-write-buffer SUB2 ;asma/flush-fn LDA2 JSR2
;asma-trees/labels ;asma-print-labels JSR2 ( DEBUG ) ;asma-trees/labels ;asma-print-labels JSR2 ( DEBUG )
;asma-print-line-count JSR2 ( DEBUG ) ;asma-print-line-count JSR2 ( DEBUG )
;asma-print-heap-usage JSR2 ( DEBUG ) ;asma-print-heap-usage JSR2 ( DEBUG )
@ -270,9 +273,6 @@
asma-IF-ERROR ,&error JCN asma-IF-ERROR ,&error JCN
( flush output buffer )
;asma-output/ptr LDA2 ;asma-write-buffer SUB2 ;asma/flush-fn LDA2 JSR2
&error &error
POP2 POP2 POP2 POP2 POP2 POP2 POP2 POP2 POP2 POP2
JMP2r JMP2r
@ -288,45 +288,56 @@ include projects/library/file-read-chunks.tal
of the last token in the chunk. of the last token in the chunk.
) )
@asma-assemble-chunk ( line^ ptr* len^ -- assembled-up-to-ptr* ) @asma-assemble-chunk ( line^ chunk* len^ -- line^ assembled-up-to-chunk* )
ROT2k ( line^ ptr* len^ ptr* len^ line^ ) ROT2 STH2 ( chunk* len^ / line^ )
;asma/line STA2 ( line^ ptr* len^ ptr* len^ ) OVR2 ADD2 ( chunk* end-chunk* / line^ )
ADD2 #0001 SUB2 NIP2 ( line^ ptr* last-ptr* ) OVR2 ;asma-read-buffer EQU2 STH
SWP2 STH2k ( line^ last-ptr* ptr* / ptr* ) DUP2 ;asma-read-buffer/end NEQ2
,&loop JMP STHr AND ;asma/eof STA
SWP2 STH2k ( end-chunk* chunk* / line^ start-of-token* )
&next-char-pop ( line^ last-ptr* ptr* char / start-of-token* ) &loop ( end-chunk* char* / line^ start-of-token* )
POP LDAk #21 LTH ,&whitespace JCN
INC2 INC2 ,&loop JMP
&loop ( line^ last-ptr* ptr* / start-of-token* )
LTH2k ,&end JCN
LDAk ( line^ last-ptr* ptr* char / start-of-token* )
DUP #20 GTH ,&next-char-pop JCN
#00 OVR2 ( line^ last-ptr* ptr* char 00 ptr* / start-of-token* ) &whitespace ( end-chunk* ws-char* / line^ start-of-token* )
STA STH2r ( line^ last-ptr* ptr* char start-of-token* ) GTH2k ,&within-chunk JCN
,asma-assemble-token JSR ( line^ last-ptr* ptr* char ) ;asma/eof LDA ,&eof JCN
( reached the end of the chunk, start-of-token* is where we assembled up to )
POP2 POP2 STH2r STH2r SWP2 JMP2r
&within-chunk ( end-chunk* ws-char* / line^ start-of-token* )
LDAk #0a NEQ ( end-chunk* ws-char* not-newline / line^ start-of-token* )
#00 OVR2 STA
STH2r ,asma-assemble-token JSR ( end-chunk* ws-char* not-newline / line^ )
JMP INC2r ( end-chunk* ws-char* / line^ )
asma-IF-ERROR ,&error JCN asma-IF-ERROR ,&error JCN
;asma/break LDA ,&break JCN
#0a NEQ ,&not-newline JCN ( line^ last-ptr* ptr* ) INC2 STH2k ( end-chunk* start-of-token* / line^ start-of-token* )
ROT2 INC2 ( last-ptr* ptr* line+1^ )
DUP2 ;asma/line STA2
ROT2 ROT2 ( line^ last-ptr* ptr* )
&not-newline
INC2 DUP2 STH2 ( line^ last-ptr* ptr* / start-of-token* )
,&loop JMP ,&loop JMP
&end &break ( end-chunk* ws-char* / line^ )
POP2 POP2 STH2r ( the read buffer has been invalidated, ws-char* plus one is where we assembled up to )
;asma/break LDA #01 SUB ;asma/break STA
INC2 NIP2 ( assembled-up-to-ptr* / line^ )
STH2r SWP2 JMP2r
&error ( end-chunk* ws-char* / line^ )
( return no progress with assembly to make file-read-chunks exit )
POP2 POP2 STH2r ;asma-read-buffer
JMP2r JMP2r
&error &eof ( end-chunk* ws-char* / line^ start-of-token* )
POP POP2 POP2 ( reached the end of file, end-chunk* is safe to write since the buffer is bigger )
JMP2r ( return no progress with assembly to make file-read-chunks exit )
POP2 ( end-chunk* / line^ start-of-token* )
#00 ROT ROT STA ( / line^ start-of-token* )
STH2r ,asma-assemble-token JSR ( / line^ )
STH2r ;asma-read-buffer JMP2r
@asma [ @asma [
&pass $1 &state $1 &line $2 &pass $1 &state $1 &line $2 &break $1 &eof $1
&token $2 &orig-token $2 &token $2 &orig-token $2
&heap $2 &addr $2 &written-addr $2 &flush-fn $2 &heap $2 &addr $2 &written-addr $2 &flush-fn $2
&src-filename $2 &dest-filename $2 &src-filename $2 &dest-filename $2
@ -338,10 +349,11 @@ include projects/library/file-read-chunks.tal
The main routine to assemble a single token. The main routine to assemble a single token.
asma/state contains several meaningful bits: asma/state contains several meaningful bits:
0x02 we are in a comment, 0x02 we are in a comment,
0x04 we are in a macro body, and 0x04 we are in a macro body,
0x08 we are in a macro body that we are ignoring 0x08 we are expecting an include filename, and
0x10 we are in a macro body that we are ignoring
(because the macro was already defined in a previous pass). (because the macro was already defined in a previous pass).
Since 0x08 never appears without 0x04, the lowest bit set in asma/state is Since 0x10 never appears without 0x04, the lowest bit set in asma/state is
always 0x00, 0x02, or 0x04, which is very handy for use with jump tables. always 0x00, 0x02, or 0x04, which is very handy for use with jump tables.
The lowest bit set can be found easily by #00 (n) SUBk AND. The lowest bit set can be found easily by #00 (n) SUBk AND.
) )
@ -384,11 +396,15 @@ include projects/library/file-read-chunks.tal
:asma-first-char-normal/_entry :asma-first-char-normal/_entry
:asma-first-char-comment/_entry :asma-first-char-comment/_entry
:asma-first-char-macro/_entry :asma-first-char-macro/_entry
$2 ( invalid position )
$2 ( empty tree for include )
&body-routines &body-routines
:asma-normal-body :asma-normal-body
:asma-ignore :asma-ignore
:asma-macro-body :asma-macro-body
$2 ( invalid position )
:asma-include-filename
@asma-parse-hex-digit ( charcode -- 00-0f if valid hex @asma-parse-hex-digit ( charcode -- 00-0f if valid hex
OR 10-ff otherwise ) OR 10-ff otherwise )
@ -644,18 +660,18 @@ include projects/library/file-read-chunks.tal
JMP2r JMP2r
&ignore-macro &ignore-macro
#0c asma-STATE-SET #14 asma-STATE-SET
JMP2r JMP2r
@asma-macro-body @asma-macro-body
;asma/state LDA #08 AND ,&skip JCN ;asma/state LDA #10 AND ,&skip JCN
;asma/token LDA2 ;asma-append-heap-string JSR2 ;asma/token LDA2 ;asma-append-heap-string JSR2
&skip &skip
JMP2r JMP2r
@asma-macro-end @asma-macro-end
#00 ;asma-append-heap-byte JSR2 #00 ;asma-append-heap-byte JSR2
#0c asma-STATE-CLEAR #14 asma-STATE-CLEAR
JMP2r JMP2r
@asma-label-define @asma-label-define
@ -706,6 +722,7 @@ include projects/library/file-read-chunks.tal
,&valid JCN ,&valid JCN
;asma-msg-hex ;asma/error STA2 ;asma-msg-hex ;asma/error STA2
POP2
JMP2r JMP2r
&valid &valid
@ -860,14 +877,30 @@ include projects/library/file-read-chunks.tal
,&macro-loop JMP ,&macro-loop JMP
&not-macro &not-macro
POP2
;&include-string ;asma-strcmp-tree JSR2 ,&not-include JCN
POP2 ( discard dummy after-node-key* )
#08 asma-STATE-SET
JMP2r
&not-include
;asma-msg-label ;asma/error STA2 ;asma-msg-label ;asma/error STA2
&error &error
POP2
JMP2r JMP2r
&too-deep &too-deep
;asma-msg-too-deep ;asma/error STA2
POP2 POP2
;asma-msg-too-deep ;asma/error STA2
JMP2r
&include-string "include 00
@asma-include-filename
#08 asma-STATE-CLEAR
;asma/heap LDA2
;asma/token LDA2 ;asma-append-heap-string JSR2
;asma-assemble-file-pass JSR2
;asma/break LDAk INC ROT ROT STA
JMP2r JMP2r
( Error messages ) ( Error messages )