46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
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package chunk
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import (
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"bytes"
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_ "embed"
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"github.com/sandertv/gophertunnel/minecraft/nbt"
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)
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// legacyBlockEntry represents a block entry used in versions prior to 1.13.
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type legacyBlockEntry struct {
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Name string `nbt:"name"`
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Meta int16 `nbt:"meta"`
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}
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var (
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//go:embed legacy_states.nbt
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legacyMappingsData []byte
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// legacyMappings allows simple conversion from a legacy block entry to a new one.
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legacyMappings = make(map[legacyBlockEntry]blockEntry)
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)
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// upgradeLegacyEntry upgrades a legacy block entry to a new one.
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func upgradeLegacyEntry(name string, meta int16) (blockEntry, bool) {
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entry, ok := legacyMappings[legacyBlockEntry{Name: name, Meta: meta}]
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if !ok {
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// Also try cases where the meta should be disregarded.
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entry, ok = legacyMappings[legacyBlockEntry{Name: name}]
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}
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return entry, ok
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}
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// init creates conversions for each legacy and alias entry.
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func init() {
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var entry struct {
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Legacy legacyBlockEntry `nbt:"legacy"`
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Updated blockEntry `nbt:"updated"`
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}
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dec := nbt.NewDecoder(bytes.NewBuffer(legacyMappingsData))
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for {
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if err := dec.Decode(&entry); err != nil {
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break
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}
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legacyMappings[entry.Legacy] = entry.Updated
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}
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}
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