v/vlib/net/html/data_structures.v

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module html
const (
null_element = int(0x80000000)
)
struct Stack {
mut:
elements []int
size int
}
[inline]
fn is_null(data int) bool {
return data == null_element
}
[inline]
fn (stack Stack) is_empty() bool {
return stack.size <= 0
}
fn (stack Stack) peek() int {
return if !stack.is_empty() {
stack.elements[stack.size - 1]
} else {
null_element
}
}
fn (mut stack Stack) pop() int {
mut to_return := null_element
if !stack.is_empty() {
to_return = stack.elements[stack.size - 1]
stack.size--
}
return to_return
}
fn (mut stack Stack) push(item int) {
if stack.elements.len > stack.size {
stack.elements[stack.size] = item
} else {
stack.elements << item
}
stack.size++
}
struct BTree {
mut:
all_tags []Tag
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node_pointer int
childrens [][]int
parents []int
}
fn (mut btree BTree) add_children(tag Tag) int {
btree.all_tags << tag
if btree.all_tags.len > 1 {
for btree.childrens.len <= btree.node_pointer {
mut temp_array := btree.childrens
temp_array << []int{}
btree.childrens = temp_array
}
btree.childrens[btree.node_pointer] << btree.all_tags.len - 1
for btree.parents.len < btree.all_tags.len {
mut temp_array := btree.parents
temp_array << 0
btree.parents = temp_array
}
btree.parents[btree.all_tags.len - 1] = btree.node_pointer
}
return btree.all_tags.len - 1
}
[inline]
fn (btree BTree) get_children() []int {
return btree.childrens[btree.node_pointer]
}
[inline]
fn (btree BTree) get_parent() int {
return btree.parents[btree.node_pointer]
}
[inline]
fn (btree BTree) get_stored() Tag {
return btree.all_tags[btree.node_pointer]
}
fn (mut btree BTree) move_pointer(to int) {
if to < btree.all_tags.len {
btree.node_pointer = to
}
}