107 lines
3.1 KiB
Forth
107 lines
3.1 KiB
Forth
fn main args: (addr array (addr array byte)) -> exit-status/ebx: int {
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# initialize fs from args[1]
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var filename/eax: (addr array byte) <- first-arg args
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var file-state-storage: file-state
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var fs/esi: (addr file-state) <- address file-state-storage
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init-file-state fs, filename
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#
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enable-screen-grid-mode
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enable-keyboard-immediate-mode
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# initialize screen state from screen size
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var nrows/eax: int <- copy 0
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var ncols/ecx: int <- copy 0
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nrows, ncols <- screen-size 0
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var screen-position-state-storage: screen-position-state
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var screen-position-state: (addr screen-position-state)
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init-screen-position-state screen-position-state, nrows, ncols
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{
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var done?/eax: boolean <- done-reading? fs
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compare done?, 0
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break-if-=
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render fs, screen-position-state
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var key/eax: byte <- read-key
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compare key, 0x71 # 'q'
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loop-if-!=
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}
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enable-keyboard-type-mode
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enable-screen-type-mode
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exit-status <- copy 0
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}
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fn render fs: (addr file-state), state: (addr screen-position-state) {
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start-drawing state
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render-normal fs, state
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}
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fn render-normal fs: (addr file-state), state: (addr screen-position-state) {
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{
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# if done-drawing?(state) break
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var done?/eax: boolean <- done-drawing? state
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compare done?, 0
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break-if-!=
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#
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var c/eax: byte <- next-char fs
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# if (c == EOF) break
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compare c, 0xffffffff # EOF marker
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break-if-=
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# if (c == '*') start-bold 0,, render-until-asterisk(fs, state), reset
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# else if (c == '_') start-bold 0,, render-until-underscore(fs, state), reset
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# else if (c == '#' and fs is at start of line) compute-color, start color, render-header-line(fs, state), reset
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# else add-char(state, c)
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}
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}
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fn render-until-asterisk fs: (addr file-state), state: (addr screen-position-state) {
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{
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# if done-drawing?(state) break
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var done?/eax: boolean <- done-drawing? state
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compare done?, 0
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break-if-!=
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#
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var c/eax: byte <- next-char fs
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# if (c == EOF) break
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compare c, 0xffffffff # EOF marker
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break-if-=
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# if (c == '*') break
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# else add-char(state, c)
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}
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}
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fn render-until-underscore fs: (addr file-state), state: (addr screen-position-state) {
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{
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# if done-drawing?(state) break
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var done?/eax: boolean <- done-drawing? state
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compare done?, 0
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break-if-!=
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#
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var c/eax: byte <- next-char fs
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# if (c == EOF) break
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compare c, 0xffffffff # EOF marker
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break-if-=
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# if (c == '_') break
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# else add-char(state, c)
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}
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}
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fn render-header-line fs: (addr file-state), state: (addr screen-position-state) {
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{
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# if done-drawing?(state) break
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var done?/eax: boolean <- done-drawing? state
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compare done?, 0
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break-if-!=
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#
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var c/eax: byte <- next-char fs
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# if (c == EOF) break
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compare c, 0xffffffff # EOF marker
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break-if-=
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# if (c == '*') break
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# else add-char(state, c)
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}
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}
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fn first-arg args-on-stack: (addr array (addr array byte)) -> out/eax: (addr array byte) {
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var args/eax: (addr array (addr array byte)) <- copy args-on-stack
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var result/eax: (addr addr array byte) <- index args, 1
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out <- copy *result
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}
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