mirror of
https://github.com/renorris/openfsd
synced 2026-03-22 23:05:36 +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
|
|
|
|
import "github.com/mmcloughlin/geohash"
|
|
|
|
// Number of bits to encode for a full precision geohash.
|
|
// This is the bit-depth of the Geohash() value stored in each Address.
|
|
const geohashFullPrecisionBits = 30
|
|
|
|
// Number of bits to utilize for determining which bucket a geohash falls into.
|
|
const geohashBucketPrecisionBits = 15
|
|
|
|
// Bits of precision to use for general-proximity broadcasts
|
|
const geohashGeneralProximityPrecisionBits = geohashBucketPrecisionBits
|
|
|
|
// Bits of precision to use for close-proximity broadcasts
|
|
const geohashCloseProximityPrecisionBits = 25
|
|
|
|
type Geohash struct {
|
|
val uint64
|
|
precision int
|
|
}
|
|
|
|
func NewGeohash(lat, lon float64) Geohash {
|
|
return Geohash{
|
|
val: geohash.EncodeIntWithPrecision(lat, lon, geohashFullPrecisionBits),
|
|
precision: geohashFullPrecisionBits,
|
|
}
|
|
}
|
|
|
|
func NewGeohashManual(hash uint64, precision int) Geohash {
|
|
return Geohash{
|
|
val: hash,
|
|
precision: precision,
|
|
}
|
|
}
|
|
|
|
func (g Geohash) Neighbors(precision int) []uint64 {
|
|
return geohash.NeighborsIntWithPrecision(g.AsPrecision(precision), uint(precision))
|
|
}
|
|
|
|
func (g Geohash) Precision() int {
|
|
return g.precision
|
|
}
|
|
|
|
func (g Geohash) Val() uint64 {
|
|
return g.val
|
|
}
|
|
|
|
func (g Geohash) AsPrecision(precision int) uint64 {
|
|
shift := g.precision - precision
|
|
if shift <= 0 {
|
|
return g.val
|
|
}
|
|
return g.val >> shift
|
|
}
|