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type int-stack {
data: (handle array int)
top: int
}
fn initialize-int-stack _self: (addr int-stack), n: int {
var self/esi: (addr int-stack) <- copy _self
var d/edi: (addr handle array int) <- get self, data
populate d, n
var top/eax: (addr int) <- get self, top
copy-to *top, 0
}
fn clear-int-stack _self: (addr int-stack) {
var self/esi: (addr int-stack) <- copy _self
var top/eax: (addr int) <- get self, top
copy-to *top, 0
}
fn push-int-stack _self: (addr int-stack), _val: int {
var self/esi: (addr int-stack) <- copy _self
var top-addr/ecx: (addr int) <- get self, top
var data-ah/edx: (addr handle array int) <- get self, data
var data/eax: (addr array int) <- lookup *data-ah
var top/edx: int <- copy *top-addr
var dest-addr/edx: (addr int) <- index data, top
var val/eax: int <- copy _val
copy-to *dest-addr, val
add-to *top-addr, 1
}
fn pop-int-stack _self: (addr int-stack) -> _/eax: int {
var self/esi: (addr int-stack) <- copy _self
var top-addr/ecx: (addr int) <- get self, top
{
compare *top-addr, 0
break-if->
return 0
}
subtract-from *top-addr, 1
var data-ah/edx: (addr handle array int) <- get self, data
var data/eax: (addr array int) <- lookup *data-ah
var top/edx: int <- copy *top-addr
var result-addr/eax: (addr int) <- index data, top
return *result-addr
}
fn int-stack-empty? _self: (addr int-stack) -> _/eax: boolean {
var self/esi: (addr int-stack) <- copy _self
var top-addr/eax: (addr int) <- get self, top
compare *top-addr, 0
{
break-if-!=
return 1 # true
}
return 0 # false
}
fn int-stack-length _self: (addr int-stack) -> _/eax: int {
var self/esi: (addr int-stack) <- copy _self
var top-addr/eax: (addr int) <- get self, top
return *top-addr
}
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