57 lines
1.1 KiB
Zig
57 lines
1.1 KiB
Zig
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const debug = @import("./debug.zig");
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const io = @import("./io.zig");
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// TODO: Finish implementing.
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pub fn Map(comptime Index: type, comptime Element: type) type {
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return struct {
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free_index: Index,
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entries: []Entry,
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const Entry = union (enum) {
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free_index: usize,
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element: Element,
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};
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const Self = @This();
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pub fn fetch(self: *Self, index: Index) *Element {
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const entry = &self.entries[index];
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debug.assert(entry.* == .element);
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return &entry.element;
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}
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pub fn deinit(self: *Self, allocator: io.Allocator) void {
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io.deallocate(allocator, self.entries);
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}
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pub fn init(allocator: io.Allocator) io.AllocationError!Self {
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const entries = try io.allocate_many(Entry, 4, allocator);
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errdefer io.deallocate(allocator, entries);
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return Self{
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.free_index = 0,
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.entries = entries,
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};
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}
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pub fn insert(self: *Self, allocator: io.Allocator, value: Element) io.AllocationError!Index {
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_ = self;
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_ = allocator;
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_ = value;
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return 0;
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}
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pub fn remove(self: *Self, index: Index) void {
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const entry = &self.entries[index];
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debug.assert(entry.* == .element);
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}
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};
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}
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