mirror of
https://github.com/renorris/openfsd
synced 2026-03-22 14:35:36 +08:00
57d54d6705
Changes:
- Implement bootstrapping library for managing several concurrent internal services
- Refactor concurrency model for connections/logical clients and their associated I/O
- Refactor server context singleton
- Refactor error handling
- Most errors are now gracefully sent to the FSD client directly encoded as an $ER packet,
enhancing visibility and debugging
- Most errors are now rightfully treated as non-fatal
- Refactor package/dependency graph
- Refactor calling conventions/interfaces for many packages
- Refactor database package
- Refactor post office
Features:
- Add VATSIM-esque HTTP/JSON "data feed"
- Add ephemeral in-memory database option
- Add user management REST API
- Add improved web interface
- Add MySQL support (drop SQLite support)
56 lines
1.3 KiB
Go
56 lines
1.3 KiB
Go
package postoffice
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import "github.com/mmcloughlin/geohash"
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// Number of bits to encode for a full precision geohash.
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// This is the bit-depth of the Geohash() value stored in each Address.
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const geohashFullPrecisionBits = 30
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// Number of bits to utilize for determining which bucket a geohash falls into.
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const geohashBucketPrecisionBits = 15
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// Bits of precision to use for general-proximity broadcasts
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const geohashGeneralProximityPrecisionBits = geohashBucketPrecisionBits
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// Bits of precision to use for close-proximity broadcasts
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const geohashCloseProximityPrecisionBits = 25
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type Geohash struct {
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val uint64
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precision int
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}
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func NewGeohash(lat, lon float64) Geohash {
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return Geohash{
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val: geohash.EncodeIntWithPrecision(lat, lon, geohashFullPrecisionBits),
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precision: geohashFullPrecisionBits,
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}
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}
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func NewGeohashManual(hash uint64, precision int) Geohash {
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return Geohash{
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val: hash,
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precision: precision,
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}
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}
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func (g Geohash) Neighbors(precision int) []uint64 {
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return geohash.NeighborsIntWithPrecision(g.AsPrecision(precision), uint(precision))
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}
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func (g Geohash) Precision() int {
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return g.precision
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}
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func (g Geohash) Val() uint64 {
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return g.val
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}
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func (g Geohash) AsPrecision(precision int) uint64 {
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shift := g.precision - precision
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if shift <= 0 {
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return g.val
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}
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return g.val >> shift
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}
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