125 lines
3.3 KiB
Forth
125 lines
3.3 KiB
Forth
fn main args-on-stack: (addr array addr array byte) -> exit-status/ebx: int {
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var args/eax: (addr array addr array byte) <- copy args-on-stack
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var len/ecx: int <- length args
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$main-body: {
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compare len, 2
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{
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break-if-!=
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# if single arg is 'test', run tests
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var tmp/ecx: (addr addr array byte) <- index args, 1
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var tmp2/eax: boolean <- string-equal? *tmp, "test"
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compare tmp2, 0 # false
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{
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break-if-=
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run-tests
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exit-status <- copy 0 # TODO: get at Num-test-failures somehow
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break $main-body
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}
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# if single arg is 'screen', run in full-screen mode
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tmp2 <- string-equal? *tmp, "screen"
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compare tmp2, 0 # false
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{
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break-if-=
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interactive
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exit-status <- copy 0
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break $main-body
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}
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# if single arg is 'type', run in typewriter mode
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tmp2 <- string-equal? *tmp, "type"
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compare tmp2, 0 # false
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{
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break-if-=
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repl
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exit-status <- copy 0
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break $main-body
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}
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# if single arg is 'test' ...
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tmp2 <- string-equal? *tmp, "test2"
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compare tmp2, 0 # false
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{
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break-if-=
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test
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exit-status <- copy 0
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break $main-body
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}
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}
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# otherwise error message
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print-string-to-real-screen "usage:\n"
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print-string-to-real-screen " to run tests: tile test\n"
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print-string-to-real-screen " full-screen mode: tile screen\n"
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print-string-to-real-screen " regular REPL: tile type\n"
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exit-status <- copy 1
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}
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}
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fn interactive {
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enable-screen-grid-mode
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enable-keyboard-immediate-mode
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var env-storage: environment
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var env/esi: (addr environment) <- address env-storage
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initialize-environment env
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draw-screen env
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{
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var key/eax: grapheme <- read-key-from-real-keyboard
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compare key, 0x11 # 'ctrl-q'
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break-if-=
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process env, key
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render env
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loop
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}
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enable-keyboard-type-mode
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enable-screen-type-mode
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}
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fn test {
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var env-storage: environment
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var env/esi: (addr environment) <- address env-storage
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initialize-environment-with-fake-screen env, 5, 0xa
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var g/eax: grapheme <- copy 0x22 # '"'
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process env, g
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render env
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}
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fn repl {
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{
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# prompt
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var line-storage: (stream byte 0x100)
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var line/ecx: (addr stream byte) <- address line-storage
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print-string-to-real-screen "> "
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# read
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clear-stream line
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read-line-from-real-keyboard line
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var done?/eax: boolean <- stream-empty? line
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compare done?, 0 # false
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break-if-!=
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# parse
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var env-storage: environment
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var env/esi: (addr environment) <- address env-storage
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initialize-environment env
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{
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var done?/eax: boolean <- stream-empty? line
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compare done?, 0 # false
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break-if-!=
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var g/eax: grapheme <- read-grapheme line
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process env, g
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loop
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}
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# eval
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var stack-storage: value-stack
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var stack/edi: (addr value-stack) <- address stack-storage
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initialize-value-stack stack, 0x10
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evaluate-environment env, stack
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# print
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var empty?/eax: boolean <- value-stack-empty? stack
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{
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compare empty?, 0 # false
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break-if-!=
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var result/eax: int <- pop-int-from-value-stack stack
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print-int32-decimal-to-real-screen result
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print-string-to-real-screen "\n"
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}
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#
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loop
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}
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}
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