887 lines
36 KiB
Forth
887 lines
36 KiB
Forth
fn evaluate functions: (addr handle function), bindings: (addr table), scratch: (addr line), end: (addr word), out: (addr value-stack) {
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var line/eax: (addr line) <- copy scratch
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var word-ah/eax: (addr handle word) <- get line, data
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var curr/eax: (addr word) <- lookup *word-ah
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var curr-stream-storage: (stream byte 0x10)
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var curr-stream/edi: (addr stream byte) <- address curr-stream-storage
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clear-value-stack out
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$evaluate:loop: {
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# precondition (should never hit)
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compare curr, 0
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break-if-=
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# update curr-stream
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emit-word curr, curr-stream
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#? print-string-to-real-screen "eval: "
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#? print-stream-to-real-screen curr-stream
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#? print-string-to-real-screen "\n"
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$evaluate:process-word: {
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### if curr-stream is an operator, perform it
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## numbers
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{
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var is-add?/eax: boolean <- stream-data-equal? curr-stream, "+"
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compare is-add?, 0
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break-if-=
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var _b/eax: int <- pop-int-from-value-stack out
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var b/edx: int <- copy _b
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var a/eax: int <- pop-int-from-value-stack out
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a <- add b
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push-int-to-value-stack out, a
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break $evaluate:process-word
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}
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{
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var is-sub?/eax: boolean <- stream-data-equal? curr-stream, "-"
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compare is-sub?, 0
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break-if-=
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var _b/eax: int <- pop-int-from-value-stack out
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var b/edx: int <- copy _b
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var a/eax: int <- pop-int-from-value-stack out
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a <- subtract b
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push-int-to-value-stack out, a
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break $evaluate:process-word
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}
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{
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var is-mul?/eax: boolean <- stream-data-equal? curr-stream, "*"
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compare is-mul?, 0
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break-if-=
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var _b/eax: int <- pop-int-from-value-stack out
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var b/edx: int <- copy _b
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var a/eax: int <- pop-int-from-value-stack out
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a <- multiply b
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push-int-to-value-stack out, a
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break $evaluate:process-word
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}
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## strings/arrays
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{
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var is-len?/eax: boolean <- stream-data-equal? curr-stream, "len"
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compare is-len?, 0
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break-if-=
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#? print-string 0, "is len\n"
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# pop target-val from out
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var out2/esi: (addr value-stack) <- copy out
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var top-addr/ecx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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#? print-string 0, "stack has stuff\n"
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var data-ah/eax: (addr handle array value) <- get out2, data
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var data/eax: (addr array value) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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top <- decrement
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var dest-offset/edx: (offset value) <- compute-offset data, top
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var target-val/edx: (addr value) <- index data, dest-offset
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# check target-val is a string or array
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var target-type-addr/eax: (addr int) <- get target-val, type
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compare *target-type-addr, 1 # string
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{
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break-if-!=
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# compute length
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var src-ah/eax: (addr handle array byte) <- get target-val, text-data
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var src/eax: (addr array byte) <- lookup *src-ah
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var result/ebx: int <- length src
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# save result into target-val
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var type-addr/eax: (addr int) <- get target-val, type
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copy-to *type-addr, 0 # int
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var target-string-ah/eax: (addr handle array byte) <- get target-val, text-data
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clear-object target-string-ah
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var target/eax: (addr int) <- get target-val, int-data
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copy-to *target, result
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break $evaluate:process-word
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}
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compare *target-type-addr, 2 # array of ints
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{
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break-if-!=
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# compute length
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var src-ah/eax: (addr handle array value) <- get target-val, array-data
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var src/eax: (addr array value) <- lookup *src-ah
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var result/ebx: int <- length src
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# save result into target-val
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var type-addr/eax: (addr int) <- get target-val, type
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copy-to *type-addr, 0 # int
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var target-array-ah/eax: (addr handle array value) <- get target-val, array-data
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clear-object target-array-ah
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var target/eax: (addr int) <- get target-val, int-data
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copy-to *target, result
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break $evaluate:process-word
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}
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}
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## files
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{
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var is-open?/eax: boolean <- stream-data-equal? curr-stream, "open"
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compare is-open?, 0
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break-if-=
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# pop target-val from out
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var out2/esi: (addr value-stack) <- copy out
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var top-addr/ecx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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var data-ah/eax: (addr handle array value) <- get out2, data
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var data/eax: (addr array value) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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top <- decrement
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var dest-offset/edx: (offset value) <- compute-offset data, top
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var target-val/edx: (addr value) <- index data, dest-offset
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# check target-val is a string
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var target-type-addr/eax: (addr int) <- get target-val, type
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compare *target-type-addr, 1 # string
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break-if-!=
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# open target-val as a filename and save the handle in target-val
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var src-ah/eax: (addr handle array byte) <- get target-val, text-data
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var src/eax: (addr array byte) <- lookup *src-ah
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var result-ah/ecx: (addr handle buffered-file) <- get target-val, file-data
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open src, 0, result-ah # write? = false
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# save result into target-val
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var type-addr/eax: (addr int) <- get target-val, type
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copy-to *type-addr, 3 # file
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var target-string-ah/eax: (addr handle array byte) <- get target-val, text-data
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var filename-ah/ecx: (addr handle array byte) <- get target-val, filename
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copy-object target-string-ah, filename-ah
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clear-object target-string-ah
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break $evaluate:process-word
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}
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{
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var is-read?/eax: boolean <- stream-data-equal? curr-stream, "read"
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compare is-read?, 0
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break-if-=
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# pop target-val from out
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var out2/esi: (addr value-stack) <- copy out
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var top-addr/ecx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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var data-ah/eax: (addr handle array value) <- get out2, data
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var data/eax: (addr array value) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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top <- decrement
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var dest-offset/edx: (offset value) <- compute-offset data, top
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var target-val/edx: (addr value) <- index data, dest-offset
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# check target-val is a file
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var target-type-addr/eax: (addr int) <- get target-val, type
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compare *target-type-addr, 3 # file
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break-if-!=
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# read a line from the file and save in target-val
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# read target-val as a filename and save the handle in target-val
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var file-ah/eax: (addr handle buffered-file) <- get target-val, file-data
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var file/eax: (addr buffered-file) <- lookup *file-ah
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var s: (stream byte 0x100)
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var s-addr/ecx: (addr stream byte) <- address s
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read-line-buffered file, s-addr
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var target/eax: (addr handle array byte) <- get target-val, text-data
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stream-to-array s-addr, target
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# save result into target-val
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var type-addr/eax: (addr int) <- get target-val, type
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copy-to *type-addr, 1 # string
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var target-file-ah/eax: (addr handle buffered-file) <- get target-val, file-data
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clear-object target-file-ah
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break $evaluate:process-word
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}
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{
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var is-slurp?/eax: boolean <- stream-data-equal? curr-stream, "slurp"
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compare is-slurp?, 0
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break-if-=
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# pop target-val from out
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var out2/esi: (addr value-stack) <- copy out
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var top-addr/ecx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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var data-ah/eax: (addr handle array value) <- get out2, data
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var data/eax: (addr array value) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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top <- decrement
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var dest-offset/edx: (offset value) <- compute-offset data, top
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var target-val/edx: (addr value) <- index data, dest-offset
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# check target-val is a file
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var target-type-addr/eax: (addr int) <- get target-val, type
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compare *target-type-addr, 3 # file
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break-if-!=
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# slurp all contents from file and save in target-val
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# read target-val as a filename and save the handle in target-val
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var file-ah/eax: (addr handle buffered-file) <- get target-val, file-data
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var file/eax: (addr buffered-file) <- lookup *file-ah
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var s: (stream byte 0x100)
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var s-addr/ecx: (addr stream byte) <- address s
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slurp file, s-addr
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var target/eax: (addr handle array byte) <- get target-val, text-data
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stream-to-array s-addr, target
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# save result into target-val
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var type-addr/eax: (addr int) <- get target-val, type
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copy-to *type-addr, 1 # string
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var target-file-ah/eax: (addr handle buffered-file) <- get target-val, file-data
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clear-object target-file-ah
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break $evaluate:process-word
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}
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{
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var is-lines?/eax: boolean <- stream-data-equal? curr-stream, "lines"
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compare is-lines?, 0
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break-if-=
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# pop target-val from out
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var out2/esi: (addr value-stack) <- copy out
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var top-addr/ecx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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var data-ah/eax: (addr handle array value) <- get out2, data
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var data/eax: (addr array value) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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top <- decrement
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var dest-offset/edx: (offset value) <- compute-offset data, top
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var target-val/edx: (addr value) <- index data, dest-offset
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# check target-val is a file
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var target-type-addr/eax: (addr int) <- get target-val, type
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compare *target-type-addr, 3 # file
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break-if-!=
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# read all lines from file and save as an array of strings in target-val
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# read target-val as a filename and save the handle in target-val
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var file-ah/eax: (addr handle buffered-file) <- get target-val, file-data
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var file/eax: (addr buffered-file) <- lookup *file-ah
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var s: (stream byte 0x100)
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var s-addr/ecx: (addr stream byte) <- address s
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slurp file, s-addr
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var tmp-ah/eax: (addr handle array byte) <- get target-val, text-data
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stream-to-array s-addr, tmp-ah
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var tmp/eax: (addr array byte) <- lookup *tmp-ah
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#? enable-screen-type-mode
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#? print-string 0, tmp
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var h: (handle array (handle array byte))
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{
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var ah/edx: (addr handle array (handle array byte)) <- address h
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split-string tmp, 0xa, ah
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}
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var target/eax: (addr handle array value) <- get target-val, array-data
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save-lines h, target
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# save result into target-val
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var type-addr/eax: (addr int) <- get target-val, type
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copy-to *type-addr, 2 # array
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var target-file-ah/eax: (addr handle buffered-file) <- get target-val, file-data
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var empty-file: (handle buffered-file)
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copy-handle empty-file, target-file-ah
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var target-text-ah/eax: (addr handle array byte) <- get target-val, text-data
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var empty-text: (handle array byte)
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copy-handle empty-text, target-text-ah
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break $evaluate:process-word
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}
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## screens
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{
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var is-fake-screen?/eax: boolean <- stream-data-equal? curr-stream, "fake-screen"
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compare is-fake-screen?, 0
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break-if-=
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var out2/esi: (addr value-stack) <- copy out
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var top-addr/ecx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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# pop width and height from out
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var _nrows/eax: int <- pop-int-from-value-stack out2
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var nrows/edx: int <- copy _nrows
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var _ncols/eax: int <- pop-int-from-value-stack out2
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var ncols/ebx: int <- copy _ncols
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# define a new screen with those dimensions
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var screen-h: (handle screen)
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var screen-ah/eax: (addr handle screen) <- address screen-h
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allocate screen-ah
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var screen/eax: (addr screen) <- lookup screen-h
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initialize-screen screen, nrows, ncols
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# push screen to stack
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var data-ah/eax: (addr handle array value) <- get out2, data
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var data/eax: (addr array value) <- lookup *data-ah
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var top/edx: int <- copy *top-addr
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increment *top-addr
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var dest-offset/edx: (offset value) <- compute-offset data, top
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var target-val/edx: (addr value) <- index data, dest-offset
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var type/eax: (addr int) <- get target-val, type
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copy-to *type, 4 # screen
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var dest/eax: (addr handle screen) <- get target-val, screen-data
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copy-handle screen-h, dest
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break $evaluate:process-word
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}
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{
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var is-print?/eax: boolean <- stream-data-equal? curr-stream, "print"
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compare is-print?, 0
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break-if-=
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var out2/esi: (addr value-stack) <- copy out
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var top-addr/ecx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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# pop string from out
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var top-addr/ecx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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decrement *top-addr
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var data-ah/eax: (addr handle array value) <- get out2, data
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var _data/eax: (addr array value) <- lookup *data-ah
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var data/edi: (addr array value) <- copy _data
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var top/eax: int <- copy *top-addr
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var dest-offset/edx: (offset value) <- compute-offset data, top
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var s/esi: (addr value) <- index data, dest-offset
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# select target screen from top of out (but don't pop it)
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compare *top-addr, 0
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break-if-<=
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var top/eax: int <- copy *top-addr
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top <- decrement
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var dest-offset/edx: (offset value) <- compute-offset data, top
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var target-val/edx: (addr value) <- index data, dest-offset
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var type/eax: (addr int) <- get target-val, type
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compare *type, 4 # screen
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break-if-!=
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# print string to target screen
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var dest-ah/eax: (addr handle screen) <- get target-val, screen-data
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var dest/eax: (addr screen) <- lookup *dest-ah
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var r/ecx: (addr int) <- get dest, cursor-row
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var c/edx: (addr int) <- get dest, cursor-col
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render-value-at dest, *r, *c, s, 0
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break $evaluate:process-word
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}
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{
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var is-move?/eax: boolean <- stream-data-equal? curr-stream, "move"
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compare is-move?, 0
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break-if-=
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var out2/esi: (addr value-stack) <- copy out
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# pop args
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var _r/eax: int <- pop-int-from-value-stack out2
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var r/ecx: int <- copy _r
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var _c/eax: int <- pop-int-from-value-stack out2
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var c/edx: int <- copy _c
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# select screen from top of out (but don't pop it)
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var top-addr/ebx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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var data-ah/eax: (addr handle array value) <- get out2, data
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var _data/eax: (addr array value) <- lookup *data-ah
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var data/edi: (addr array value) <- copy _data
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var top/eax: int <- copy *top-addr
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top <- decrement
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var target-offset/eax: (offset value) <- compute-offset data, top
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var target-val/ebx: (addr value) <- index data, target-offset
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var type/eax: (addr int) <- get target-val, type
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compare *type, 4 # screen
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break-if-!=
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var target-ah/eax: (addr handle screen) <- get target-val, screen-data
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var target/eax: (addr screen) <- lookup *target-ah
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move-cursor target, r, c
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break $evaluate:process-word
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}
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{
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var is-up?/eax: boolean <- stream-data-equal? curr-stream, "up"
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compare is-up?, 0
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break-if-=
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var out2/esi: (addr value-stack) <- copy out
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var top-addr/ebx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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# pop args
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var _d/eax: int <- pop-int-from-value-stack out2
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var d/ecx: int <- copy _d
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# select screen from top of out (but don't pop it)
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compare *top-addr, 0
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break-if-<=
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var data-ah/eax: (addr handle array value) <- get out2, data
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var _data/eax: (addr array value) <- lookup *data-ah
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var data/edi: (addr array value) <- copy _data
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var top/eax: int <- copy *top-addr
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top <- decrement
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var target-offset/eax: (offset value) <- compute-offset data, top
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var target-val/ebx: (addr value) <- index data, target-offset
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var type/eax: (addr int) <- get target-val, type
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compare *type, 4 # screen
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break-if-!=
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var target-ah/eax: (addr handle screen) <- get target-val, screen-data
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var _target/eax: (addr screen) <- lookup *target-ah
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var target/edi: (addr screen) <- copy _target
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var r/edx: (addr int) <- get target, cursor-row
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var c/eax: (addr int) <- get target, cursor-col
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var col/eax: int <- copy *c
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{
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compare d, 0
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break-if-<=
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compare *r, 1
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break-if-<=
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print-string target "│"
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decrement *r
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move-cursor target, *r, col
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d <- decrement
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loop
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}
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break $evaluate:process-word
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}
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{
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var is-down?/eax: boolean <- stream-data-equal? curr-stream, "down"
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compare is-down?, 0
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break-if-=
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var out2/esi: (addr value-stack) <- copy out
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var top-addr/ebx: (addr int) <- get out2, top
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compare *top-addr, 0
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break-if-<=
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# pop args
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var _d/eax: int <- pop-int-from-value-stack out2
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var d/ecx: int <- copy _d
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# select screen from top of out (but don't pop it)
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compare *top-addr, 0
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break-if-<=
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var data-ah/eax: (addr handle array value) <- get out2, data
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var _data/eax: (addr array value) <- lookup *data-ah
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var data/edi: (addr array value) <- copy _data
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var top/eax: int <- copy *top-addr
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top <- decrement
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var target-offset/eax: (offset value) <- compute-offset data, top
|
|
var target-val/ebx: (addr value) <- index data, target-offset
|
|
var type/eax: (addr int) <- get target-val, type
|
|
compare *type, 4 # screen
|
|
break-if-!=
|
|
var target-ah/eax: (addr handle screen) <- get target-val, screen-data
|
|
var _target/eax: (addr screen) <- lookup *target-ah
|
|
var target/edi: (addr screen) <- copy _target
|
|
var bound-a/ebx: (addr int) <- get target, num-rows
|
|
var bound/ebx: int <- copy *bound-a
|
|
var r/edx: (addr int) <- get target, cursor-row
|
|
var c/eax: (addr int) <- get target, cursor-col
|
|
var col/eax: int <- copy *c
|
|
{
|
|
compare d, 0
|
|
break-if-<=
|
|
compare *r, bound
|
|
break-if->=
|
|
print-string target "│"
|
|
increment *r
|
|
move-cursor target, *r, col
|
|
d <- decrement
|
|
loop
|
|
}
|
|
break $evaluate:process-word
|
|
}
|
|
{
|
|
var is-left?/eax: boolean <- stream-data-equal? curr-stream, "left"
|
|
compare is-left?, 0
|
|
break-if-=
|
|
var out2/esi: (addr value-stack) <- copy out
|
|
var top-addr/ebx: (addr int) <- get out2, top
|
|
compare *top-addr, 0
|
|
break-if-<=
|
|
# pop args
|
|
var _d/eax: int <- pop-int-from-value-stack out2
|
|
var d/ecx: int <- copy _d
|
|
# select screen from top of out (but don't pop it)
|
|
compare *top-addr, 0
|
|
break-if-<=
|
|
var data-ah/eax: (addr handle array value) <- get out2, data
|
|
var _data/eax: (addr array value) <- lookup *data-ah
|
|
var data/edi: (addr array value) <- copy _data
|
|
var top/eax: int <- copy *top-addr
|
|
top <- decrement
|
|
var target-offset/eax: (offset value) <- compute-offset data, top
|
|
var target-val/ebx: (addr value) <- index data, target-offset
|
|
var type/eax: (addr int) <- get target-val, type
|
|
compare *type, 4 # screen
|
|
break-if-!=
|
|
var target-ah/eax: (addr handle screen) <- get target-val, screen-data
|
|
var _target/eax: (addr screen) <- lookup *target-ah
|
|
var target/edi: (addr screen) <- copy _target
|
|
var c/edx: (addr int) <- get target, cursor-col
|
|
var r/eax: (addr int) <- get target, cursor-row
|
|
var row/eax: int <- copy *r
|
|
{
|
|
compare d, 0
|
|
break-if-<=
|
|
compare *c, 1
|
|
break-if-<=
|
|
print-string target "─"
|
|
decrement *c
|
|
decrement *c # second one to undo the print above
|
|
move-cursor target, row, *c
|
|
d <- decrement
|
|
loop
|
|
}
|
|
break $evaluate:process-word
|
|
}
|
|
{
|
|
var is-right?/eax: boolean <- stream-data-equal? curr-stream, "right"
|
|
compare is-right?, 0
|
|
break-if-=
|
|
var out2/esi: (addr value-stack) <- copy out
|
|
var top-addr/ebx: (addr int) <- get out2, top
|
|
compare *top-addr, 0
|
|
break-if-<=
|
|
# pop args
|
|
var _d/eax: int <- pop-int-from-value-stack out2
|
|
var d/ecx: int <- copy _d
|
|
# select screen from top of out (but don't pop it)
|
|
compare *top-addr, 0
|
|
break-if-<=
|
|
var data-ah/eax: (addr handle array value) <- get out2, data
|
|
var _data/eax: (addr array value) <- lookup *data-ah
|
|
var data/edi: (addr array value) <- copy _data
|
|
var top/eax: int <- copy *top-addr
|
|
top <- decrement
|
|
var target-offset/eax: (offset value) <- compute-offset data, top
|
|
var target-val/ebx: (addr value) <- index data, target-offset
|
|
var type/eax: (addr int) <- get target-val, type
|
|
compare *type, 4 # screen
|
|
break-if-!=
|
|
var target-ah/eax: (addr handle screen) <- get target-val, screen-data
|
|
var _target/eax: (addr screen) <- lookup *target-ah
|
|
var target/edi: (addr screen) <- copy _target
|
|
var bound-a/ebx: (addr int) <- get target, num-rows
|
|
var bound/ebx: int <- copy *bound-a
|
|
var c/edx: (addr int) <- get target, cursor-col
|
|
var r/eax: (addr int) <- get target, cursor-row
|
|
var row/eax: int <- copy *r
|
|
{
|
|
compare d, 0
|
|
break-if-<=
|
|
compare *c, bound
|
|
break-if->=
|
|
print-string target "─"
|
|
# no increment; the print took care of it
|
|
move-cursor target, row, *c
|
|
d <- decrement
|
|
loop
|
|
}
|
|
break $evaluate:process-word
|
|
}
|
|
## HACKS: we're trying to avoid turning this into Forth
|
|
{
|
|
var is-dup?/eax: boolean <- stream-data-equal? curr-stream, "dup"
|
|
compare is-dup?, 0
|
|
break-if-=
|
|
# read src-val from out
|
|
var out2/esi: (addr value-stack) <- copy out
|
|
var top-addr/ecx: (addr int) <- get out2, top
|
|
compare *top-addr, 0
|
|
break-if-<=
|
|
var data-ah/eax: (addr handle array value) <- get out2, data
|
|
var data/eax: (addr array value) <- lookup *data-ah
|
|
var top/ecx: int <- copy *top-addr
|
|
top <- decrement
|
|
var offset/edx: (offset value) <- compute-offset data, top
|
|
var src-val/edx: (addr value) <- index data, offset
|
|
# push a copy of it
|
|
top <- increment
|
|
var offset/ebx: (offset value) <- compute-offset data, top
|
|
var target-val/ebx: (addr value) <- index data, offset
|
|
copy-object src-val, target-val
|
|
# commit
|
|
var top-addr/ecx: (addr int) <- get out2, top
|
|
increment *top-addr
|
|
break $evaluate:process-word
|
|
}
|
|
{
|
|
var is-swap?/eax: boolean <- stream-data-equal? curr-stream, "swap"
|
|
compare is-swap?, 0
|
|
break-if-=
|
|
# read top-val from out
|
|
var out2/esi: (addr value-stack) <- copy out
|
|
var top-addr/ecx: (addr int) <- get out2, top
|
|
compare *top-addr, 0
|
|
break-if-<=
|
|
var data-ah/eax: (addr handle array value) <- get out2, data
|
|
var data/eax: (addr array value) <- lookup *data-ah
|
|
var top/ecx: int <- copy *top-addr
|
|
top <- decrement
|
|
var offset/edx: (offset value) <- compute-offset data, top
|
|
var top-val/edx: (addr value) <- index data, offset
|
|
# read next val from out
|
|
top <- decrement
|
|
var offset/ebx: (offset value) <- compute-offset data, top
|
|
var pen-top-val/ebx: (addr value) <- index data, offset
|
|
# swap
|
|
var tmp: value
|
|
var tmp-a/eax: (addr value) <- address tmp
|
|
copy-object top-val, tmp-a
|
|
copy-object pen-top-val, top-val
|
|
copy-object tmp-a, pen-top-val
|
|
break $evaluate:process-word
|
|
}
|
|
### if curr-stream defines a binding, save top of stack to bindings
|
|
{
|
|
var done?/eax: boolean <- stream-empty? curr-stream
|
|
compare done?, 0 # false
|
|
break-if-!=
|
|
var new-byte/eax: byte <- read-byte curr-stream
|
|
compare new-byte, 0x3d # '='
|
|
break-if-!=
|
|
# pop target-val from out
|
|
var out2/esi: (addr value-stack) <- copy out
|
|
var top-addr/ecx: (addr int) <- get out2, top
|
|
compare *top-addr, 0
|
|
break-if-<=
|
|
var data-ah/eax: (addr handle array value) <- get out2, data
|
|
var data/eax: (addr array value) <- lookup *data-ah
|
|
var top/edx: int <- copy *top-addr
|
|
top <- decrement
|
|
var dest-offset/edx: (offset value) <- compute-offset data, top
|
|
var target-val/edx: (addr value) <- index data, dest-offset
|
|
# create binding from curr-stream to target-val
|
|
var key-h: (handle array byte)
|
|
var key/ecx: (addr handle array byte) <- address key-h
|
|
stream-to-array curr-stream, key
|
|
bind-in-table bindings, key, target-val
|
|
break $evaluate:process-word
|
|
}
|
|
rewind-stream curr-stream
|
|
### if curr-stream is a known function name, call it appropriately
|
|
{
|
|
var callee-h: (handle function)
|
|
var callee-ah/eax: (addr handle function) <- address callee-h
|
|
find-function functions, curr-stream, callee-ah
|
|
var callee/eax: (addr function) <- lookup *callee-ah
|
|
compare callee, 0
|
|
break-if-=
|
|
perform-call callee, out, functions
|
|
break $evaluate:process-word
|
|
}
|
|
### if it's a name, push its value
|
|
{
|
|
compare bindings, 0
|
|
break-if-=
|
|
var tmp: (handle array byte)
|
|
var curr-string-ah/edx: (addr handle array byte) <- address tmp
|
|
stream-to-array curr-stream, curr-string-ah # unfortunate leak
|
|
var curr-string/eax: (addr array byte) <- lookup *curr-string-ah
|
|
var val-storage: (handle value)
|
|
var val-ah/edi: (addr handle value) <- address val-storage
|
|
lookup-binding bindings, curr-string, val-ah
|
|
var val/eax: (addr value) <- lookup *val-ah
|
|
compare val, 0
|
|
break-if-=
|
|
push-value-stack out, val
|
|
break $evaluate:process-word
|
|
}
|
|
### if the word starts with a quote and ends with a quote, turn it into a string
|
|
{
|
|
var start/eax: byte <- stream-first curr-stream
|
|
compare start, 0x22 # double-quote
|
|
break-if-!=
|
|
var end/eax: byte <- stream-final curr-stream
|
|
compare end, 0x22 # double-quote
|
|
break-if-!=
|
|
var h: (handle array byte)
|
|
var s/eax: (addr handle array byte) <- address h
|
|
unquote-stream-to-array curr-stream, s # leak
|
|
push-string-to-value-stack out, *s
|
|
break $evaluate:process-word
|
|
}
|
|
### if the word starts with a '[' and ends with a ']', turn it into an array
|
|
{
|
|
var start/eax: byte <- stream-first curr-stream
|
|
compare start, 0x5b # '['
|
|
break-if-!=
|
|
var end/eax: byte <- stream-final curr-stream
|
|
compare end, 0x5d # ']'
|
|
break-if-!=
|
|
# wastefully create a new input string to strip quotes
|
|
var h: (handle array value)
|
|
var input-ah/eax: (addr handle array byte) <- address h
|
|
unquote-stream-to-array curr-stream, input-ah # leak
|
|
# wastefully parse input into int-array
|
|
# TODO: support parsing arrays of other types
|
|
var input/eax: (addr array byte) <- lookup *input-ah
|
|
var h2: (handle array int)
|
|
var int-array-ah/esi: (addr handle array int) <- address h2
|
|
parse-array-of-decimal-ints input, int-array-ah # leak
|
|
var _int-array/eax: (addr array int) <- lookup *int-array-ah
|
|
var int-array/esi: (addr array int) <- copy _int-array
|
|
var len/ebx: int <- length int-array
|
|
# push value-array of same size as int-array
|
|
var h3: (handle array value)
|
|
var value-array-ah/eax: (addr handle array value) <- address h3
|
|
populate value-array-ah, len
|
|
push-array-to-value-stack out, *value-array-ah
|
|
# copy int-array into value-array
|
|
var _value-array/eax: (addr array value) <- lookup *value-array-ah
|
|
var value-array/edi: (addr array value) <- copy _value-array
|
|
var i/eax: int <- copy 0
|
|
{
|
|
compare i, len
|
|
break-if->=
|
|
var src-addr/ecx: (addr int) <- index int-array, i
|
|
var src/ecx: int <- copy *src-addr
|
|
var dest-offset/edx: (offset value) <- compute-offset value-array, i
|
|
var dest-val/edx: (addr value) <- index value-array, dest-offset
|
|
var dest/edx: (addr int) <- get dest-val, int-data
|
|
copy-to *dest, src
|
|
i <- increment
|
|
loop
|
|
}
|
|
break $evaluate:process-word
|
|
}
|
|
### otherwise assume it's a literal number and push it
|
|
{
|
|
var n/eax: int <- parse-decimal-int-from-stream curr-stream
|
|
push-int-to-value-stack out, n
|
|
}
|
|
}
|
|
# termination check
|
|
compare curr, end
|
|
break-if-=
|
|
# update
|
|
var next-word-ah/edx: (addr handle word) <- get curr, next
|
|
curr <- lookup *next-word-ah
|
|
#
|
|
loop
|
|
}
|
|
# process next line if necessary
|
|
var line/eax: (addr line) <- copy scratch
|
|
var next-line-ah/eax: (addr handle line) <- get line, next
|
|
var next-line/eax: (addr line) <- lookup *next-line-ah
|
|
compare next-line, 0
|
|
break-if-=
|
|
evaluate functions, bindings, next-line, end, out
|
|
}
|
|
|
|
fn test-evaluate {
|
|
var line-storage: line
|
|
var line/esi: (addr line) <- address line-storage
|
|
var first-word-ah/eax: (addr handle word) <- get line-storage, data
|
|
allocate-word-with first-word-ah, "3"
|
|
append-word-with *first-word-ah, "=a"
|
|
var next-line-ah/eax: (addr handle line) <- get line-storage, next
|
|
allocate next-line-ah
|
|
var next-line/eax: (addr line) <- lookup *next-line-ah
|
|
var first-word-ah/eax: (addr handle word) <- get next-line, data
|
|
allocate-word-with first-word-ah, "a"
|
|
var functions-storage: (handle function)
|
|
var functions/ecx: (addr handle function) <- address functions-storage
|
|
var table-storage: table
|
|
var table/ebx: (addr table) <- address table-storage
|
|
initialize-table table, 0x10
|
|
var stack-storage: value-stack
|
|
var stack/edi: (addr value-stack) <- address stack-storage
|
|
initialize-value-stack stack, 0x10
|
|
evaluate functions, table, line, 0, stack
|
|
var x/eax: int <- pop-int-from-value-stack stack
|
|
check-ints-equal x, 3, "F - test-evaluate"
|
|
}
|
|
|
|
fn find-function first: (addr handle function), name: (addr stream byte), out: (addr handle function) {
|
|
var curr/esi: (addr handle function) <- copy first
|
|
$find-function:loop: {
|
|
var _f/eax: (addr function) <- lookup *curr
|
|
var f/ecx: (addr function) <- copy _f
|
|
compare f, 0
|
|
break-if-=
|
|
var curr-name-ah/eax: (addr handle array byte) <- get f, name
|
|
var curr-name/eax: (addr array byte) <- lookup *curr-name-ah
|
|
var done?/eax: boolean <- stream-data-equal? name, curr-name
|
|
compare done?, 0 # false
|
|
{
|
|
break-if-=
|
|
copy-handle *curr, out
|
|
break $find-function:loop
|
|
}
|
|
curr <- get f, next
|
|
loop
|
|
}
|
|
}
|
|
|
|
fn perform-call _callee: (addr function), caller-stack: (addr value-stack), functions: (addr handle function) {
|
|
var callee/ecx: (addr function) <- copy _callee
|
|
# create bindings for args
|
|
var table-storage: table
|
|
var table/esi: (addr table) <- address table-storage
|
|
initialize-table table, 0x10
|
|
bind-args callee, caller-stack, table
|
|
# obtain body
|
|
var body-ah/eax: (addr handle line) <- get callee, body
|
|
var body/eax: (addr line) <- lookup *body-ah
|
|
# perform call
|
|
var stack-storage: value-stack
|
|
var stack/edi: (addr value-stack) <- address stack-storage
|
|
initialize-value-stack stack, 0x10
|
|
#? print-string-to-real-screen "about to enter recursive eval\n"
|
|
evaluate functions, table, body, 0, stack
|
|
#? print-string-to-real-screen "exited recursive eval\n"
|
|
# pop target-val from out
|
|
var top-addr/ecx: (addr int) <- get stack, top
|
|
compare *top-addr, 0
|
|
break-if-<=
|
|
var data-ah/eax: (addr handle array value) <- get stack, data
|
|
var data/eax: (addr array value) <- lookup *data-ah
|
|
var top/edx: int <- copy *top-addr
|
|
top <- decrement
|
|
var dest-offset/edx: (offset value) <- compute-offset data, top
|
|
var target-val/edx: (addr value) <- index data, dest-offset
|
|
# stitch target-val into caller-stack
|
|
push-value-stack caller-stack, target-val
|
|
}
|
|
|
|
# pop args from the caller-stack and bind them to successive args
|
|
# implies: function args are stored in reverse order
|
|
fn bind-args _callee: (addr function), _caller-stack: (addr value-stack), table: (addr table) {
|
|
var callee/ecx: (addr function) <- copy _callee
|
|
var curr-arg-ah/eax: (addr handle word) <- get callee, args
|
|
var curr-arg/eax: (addr word) <- lookup *curr-arg-ah
|
|
#
|
|
var curr-key-storage: (handle array byte)
|
|
var curr-key/edx: (addr handle array byte) <- address curr-key-storage
|
|
{
|
|
compare curr-arg, 0
|
|
break-if-=
|
|
# create binding
|
|
word-to-string curr-arg, curr-key
|
|
{
|
|
# pop target-val from caller-stack
|
|
var caller-stack/esi: (addr value-stack) <- copy _caller-stack
|
|
var top-addr/ecx: (addr int) <- get caller-stack, top
|
|
compare *top-addr, 0
|
|
break-if-<=
|
|
decrement *top-addr
|
|
var data-ah/eax: (addr handle array value) <- get caller-stack, data
|
|
var data/eax: (addr array value) <- lookup *data-ah
|
|
var top/ebx: int <- copy *top-addr
|
|
var dest-offset/ebx: (offset value) <- compute-offset data, top
|
|
var target-val/ebx: (addr value) <- index data, dest-offset
|
|
# create binding from curr-key to target-val
|
|
bind-in-table table, curr-key, target-val
|
|
}
|
|
#
|
|
var next-arg-ah/edx: (addr handle word) <- get curr-arg, next
|
|
curr-arg <- lookup *next-arg-ah
|
|
loop
|
|
}
|
|
}
|
|
|
|
# Copy of 'simplify' that just tracks the maximum stack depth needed
|
|
# Doesn't actually need to simulate the stack, since every word has a predictable effect.
|
|
fn max-stack-depth first-word: (addr word), final-word: (addr word) -> _/edi: int {
|
|
var curr-word/eax: (addr word) <- copy first-word
|
|
var curr-depth/ecx: int <- copy 0
|
|
var result/edi: int <- copy 0
|
|
$max-stack-depth:loop: {
|
|
$max-stack-depth:process-word: {
|
|
# handle operators
|
|
{
|
|
var is-add?/eax: boolean <- word-equal? curr-word, "+"
|
|
compare is-add?, 0
|
|
break-if-=
|
|
curr-depth <- decrement
|
|
break $max-stack-depth:process-word
|
|
}
|
|
{
|
|
var is-sub?/eax: boolean <- word-equal? curr-word, "-"
|
|
compare is-sub?, 0
|
|
break-if-=
|
|
curr-depth <- decrement
|
|
break $max-stack-depth:process-word
|
|
}
|
|
{
|
|
var is-mul?/eax: boolean <- word-equal? curr-word, "*"
|
|
compare is-mul?, 0
|
|
break-if-=
|
|
curr-depth <- decrement
|
|
break $max-stack-depth:process-word
|
|
}
|
|
# otherwise it's an int (do we need error-checking?)
|
|
curr-depth <- increment
|
|
# update max depth if necessary
|
|
{
|
|
compare curr-depth, result
|
|
break-if-<=
|
|
result <- copy curr-depth
|
|
}
|
|
}
|
|
# if curr-word == final-word break
|
|
compare curr-word, final-word
|
|
break-if-=
|
|
# curr-word = curr-word->next
|
|
var next-word-ah/edx: (addr handle word) <- get curr-word, next
|
|
curr-word <- lookup *next-word-ah
|
|
#
|
|
loop
|
|
}
|
|
return result
|
|
}
|