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# todo: turn this into a sum type
type value {
type: int
number-data: float # if type = 0
text-data: (handle array byte) # if type = 1
array-data: (handle array value) # if type = 2
file-data: (handle buffered-file) # if type = 3
filename: (handle array byte) # if type = 3
screen-data: (handle screen) # if type = 4
}
fn initialize-value-with-integer _self: (addr value), n: int {
var self/esi: (addr value) <- copy _self
var type/eax: (addr int) <- get self, type
copy-to *type, 0/number
var val/xmm0: float <- convert n
var dest/eax: (addr float) <- get self, number-data
copy-to *dest, val
}
fn initialize-value-with-float _self: (addr value), n: float {
var self/esi: (addr value) <- copy _self
var type/eax: (addr int) <- get self, type
copy-to *type, 0/number
var val/xmm0: float <- copy n
var dest/eax: (addr float) <- get self, number-data
copy-to *dest, val
}
# synaesthesia
# TODO: right-justify
fn render-number screen: (addr screen), val: float, x: int, y: int, top-level?: boolean -> _/eax: int {
# if we're inside an array, don't color
compare top-level?, 0
{
break-if-!=
var new-x/eax: int <- render-float-decimal screen, val, 3/precision, x, y, 3/fg, 0/bg
return new-x
}
var val-int/eax: int <- convert val
var _bg/eax: int <- hash-color val-int
var bg/ecx: int <- copy _bg
var fg/edx: int <- copy 7
{
compare bg, 2
break-if-!=
fg <- copy 0
}
{
compare bg, 3
break-if-!=
fg <- copy 0
}
{
compare bg, 6
break-if-!=
fg <- copy 0
}
draw-code-point screen, 0x20/space, x, y, fg, bg
increment x
var new-x/eax: int <- render-float-decimal screen, val, 3/precision, x, y, fg, bg
draw-code-point screen, 0x20/space, new-x, y, fg, bg
new-x <- increment
return new-x
}
fn hash-color val: int -> _/eax: int {
var quotient/eax: int <- copy 0
var remainder/edx: int <- copy 0
quotient, remainder <- integer-divide val, 7 # assumes that 7 is always the background color
return remainder
}
fn test-render-number {
# setup: screen
var screen-on-stack: screen
var screen/edi: (addr screen) <- address screen-on-stack
initialize-screen screen, 0x20, 4
# integers render with some padding spaces
var new-x/eax: int <- render-number screen, 0/n, 0/x, 0/y, 1/at-top-level
check-screen-row screen, 0/y, " 0 ", "F - test-render-number"
check-ints-equal new-x, 3, "F - test-render-number: result"
# we won't bother testing the background colors; lots of flexibility there
}
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