mirror of
https://github.com/superseriousbusiness/gotosocial.git
synced 2024-12-05 18:12:46 +00:00
57dc742c76
Bumps [github.com/KimMachineGun/automemlimit](https://github.com/KimMachineGun/automemlimit) from 0.2.4 to 0.2.5. - [Release notes](https://github.com/KimMachineGun/automemlimit/releases) - [Commits](https://github.com/KimMachineGun/automemlimit/compare/v0.2.4...v0.2.5) --- updated-dependencies: - dependency-name: github.com/KimMachineGun/automemlimit dependency-type: direct:production update-type: version-update:semver-patch ... Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
81 lines
1.8 KiB
Go
81 lines
1.8 KiB
Go
package asm
|
|
|
|
// Metadata contains metadata about an instruction.
|
|
type Metadata struct {
|
|
head *metaElement
|
|
}
|
|
|
|
type metaElement struct {
|
|
next *metaElement
|
|
key, value interface{}
|
|
}
|
|
|
|
// Find the element containing key.
|
|
//
|
|
// Returns nil if there is no such element.
|
|
func (m *Metadata) find(key interface{}) *metaElement {
|
|
for e := m.head; e != nil; e = e.next {
|
|
if e.key == key {
|
|
return e
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// Remove an element from the linked list.
|
|
//
|
|
// Copies as many elements of the list as necessary to remove r, but doesn't
|
|
// perform a full copy.
|
|
func (m *Metadata) remove(r *metaElement) {
|
|
current := &m.head
|
|
for e := m.head; e != nil; e = e.next {
|
|
if e == r {
|
|
// We've found the element we want to remove.
|
|
*current = e.next
|
|
|
|
// No need to copy the tail.
|
|
return
|
|
}
|
|
|
|
// There is another element in front of the one we want to remove.
|
|
// We have to copy it to be able to change metaElement.next.
|
|
cpy := &metaElement{key: e.key, value: e.value}
|
|
*current = cpy
|
|
current = &cpy.next
|
|
}
|
|
}
|
|
|
|
// Set a key to a value.
|
|
//
|
|
// If value is nil, the key is removed. Avoids modifying old metadata by
|
|
// copying if necessary.
|
|
func (m *Metadata) Set(key, value interface{}) {
|
|
if e := m.find(key); e != nil {
|
|
if e.value == value {
|
|
// Key is present and the value is the same. Nothing to do.
|
|
return
|
|
}
|
|
|
|
// Key is present with a different value. Create a copy of the list
|
|
// which doesn't have the element in it.
|
|
m.remove(e)
|
|
}
|
|
|
|
// m.head is now a linked list that doesn't contain key.
|
|
if value == nil {
|
|
return
|
|
}
|
|
|
|
m.head = &metaElement{key: key, value: value, next: m.head}
|
|
}
|
|
|
|
// Get the value of a key.
|
|
//
|
|
// Returns nil if no value with the given key is present.
|
|
func (m *Metadata) Get(key interface{}) interface{} {
|
|
if e := m.find(key); e != nil {
|
|
return e.value
|
|
}
|
|
return nil
|
|
}
|