121 lines
3.1 KiB
Forth
121 lines
3.1 KiB
Forth
fn main args: (addr array (addr array byte)) -> exit-status/ebx: int {
|
|
# initialize fs from args[1]
|
|
var filename/eax: (addr array byte) <- first-arg args
|
|
var file-state-storage: file-state
|
|
var fs/esi: (addr file-state) <- address file-state-storage
|
|
init-file-state fs, filename
|
|
#
|
|
enable-screen-grid-mode
|
|
enable-keyboard-immediate-mode
|
|
# initialize screen state from screen size
|
|
var screen-position-state-storage: screen-position-state
|
|
var screen-position-state/eax: (addr screen-position-state) <- address screen-position-state-storage
|
|
init-screen-position-state screen-position-state
|
|
normal-text
|
|
{
|
|
render fs, screen-position-state
|
|
var key/eax: byte <- read-key
|
|
compare key, 0x71 # 'q'
|
|
loop-if-!=
|
|
}
|
|
enable-keyboard-type-mode
|
|
enable-screen-type-mode
|
|
exit-status <- copy 0
|
|
}
|
|
|
|
fn render fs: (addr file-state), state: (addr screen-position-state) {
|
|
start-drawing state
|
|
render-normal fs, state
|
|
}
|
|
|
|
fn render-normal fs: (addr file-state), state: (addr screen-position-state) {
|
|
$render-normal:body: {
|
|
# if done-drawing?(state) break
|
|
var done?/eax: boolean <- done-drawing? state
|
|
compare done?, 0 # false
|
|
break-if-!=
|
|
#
|
|
var c/eax: byte <- next-char fs
|
|
# if (c == EOF) break
|
|
compare c, 0xffffffff # EOF marker
|
|
break-if-=
|
|
# if (c == '*') switch to bold
|
|
compare c, 0x2a # '*'
|
|
{
|
|
break-if-!=
|
|
start-bold 0
|
|
render-until-asterisk fs, state
|
|
normal-text
|
|
loop $render-normal:body
|
|
}
|
|
# if (c == '_') switch to bold
|
|
compare c, 0x5f # '_'
|
|
{
|
|
break-if-!=
|
|
start-color 0, 0xec, 7 # 236 = darkish gray
|
|
start-bold 0
|
|
render-until-underscore fs, state
|
|
reset-formatting 0
|
|
start-color 0, 0xec, 7 # 236 = darkish gray
|
|
loop $render-normal:body
|
|
}
|
|
#
|
|
add-char state, c
|
|
#
|
|
loop
|
|
}
|
|
}
|
|
|
|
fn render-until-asterisk fs: (addr file-state), state: (addr screen-position-state) {
|
|
{
|
|
# if done-drawing?(state) break
|
|
var done?/eax: boolean <- done-drawing? state
|
|
compare done?, 0 # false
|
|
break-if-!=
|
|
#
|
|
var c/eax: byte <- next-char fs
|
|
# if (c == EOF) break
|
|
compare c, 0xffffffff # EOF marker
|
|
break-if-=
|
|
# if (c == '*') break
|
|
compare c, 0x2a # '*'
|
|
break-if-=
|
|
#
|
|
add-char state, c
|
|
#
|
|
loop
|
|
}
|
|
}
|
|
|
|
fn render-until-underscore fs: (addr file-state), state: (addr screen-position-state) {
|
|
{
|
|
# if done-drawing?(state) break
|
|
var done?/eax: boolean <- done-drawing? state
|
|
compare done?, 0 # false
|
|
break-if-!=
|
|
#
|
|
var c/eax: byte <- next-char fs
|
|
# if (c == EOF) break
|
|
compare c, 0xffffffff # EOF marker
|
|
break-if-=
|
|
# if (c == '_') break
|
|
compare c, 0x5f # '_'
|
|
break-if-=
|
|
#
|
|
add-char state, c
|
|
#
|
|
loop
|
|
}
|
|
}
|
|
|
|
fn first-arg args-on-stack: (addr array (addr array byte)) -> out/eax: (addr array byte) {
|
|
var args/eax: (addr array (addr array byte)) <- copy args-on-stack
|
|
var result/eax: (addr addr array byte) <- index args, 1
|
|
out <- copy *result
|
|
}
|
|
|
|
fn normal-text {
|
|
reset-formatting 0
|
|
start-color 0, 0xec, 7 # 236 = darkish gray
|
|
}
|