diff options
Diffstat (limited to 'third_party/rust/uniffi_bindgen/src/bindings/swift/templates/TimestampHelper.swift')
-rw-r--r-- | third_party/rust/uniffi_bindgen/src/bindings/swift/templates/TimestampHelper.swift | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/third_party/rust/uniffi_bindgen/src/bindings/swift/templates/TimestampHelper.swift b/third_party/rust/uniffi_bindgen/src/bindings/swift/templates/TimestampHelper.swift new file mode 100644 index 0000000000..3cd472fa0e --- /dev/null +++ b/third_party/rust/uniffi_bindgen/src/bindings/swift/templates/TimestampHelper.swift @@ -0,0 +1,34 @@ +fileprivate struct FfiConverterTimestamp: FfiConverterRustBuffer { + typealias SwiftType = Date + + public static func read(from buf: inout (data: Data, offset: Data.Index)) throws -> Date { + let seconds: Int64 = try readInt(&buf) + let nanoseconds: UInt32 = try readInt(&buf) + if seconds >= 0 { + let delta = Double(seconds) + (Double(nanoseconds) / 1.0e9) + return Date.init(timeIntervalSince1970: delta) + } else { + let delta = Double(seconds) - (Double(nanoseconds) / 1.0e9) + return Date.init(timeIntervalSince1970: delta) + } + } + + public static func write(_ value: Date, into buf: inout [UInt8]) { + var delta = value.timeIntervalSince1970 + var sign: Int64 = 1 + if delta < 0 { + // The nanoseconds portion of the epoch offset must always be + // positive, to simplify the calculation we will use the absolute + // value of the offset. + sign = -1 + delta = -delta + } + if delta.rounded(.down) > Double(Int64.max) { + fatalError("Timestamp overflow, exceeds max bounds supported by Uniffi") + } + let seconds = Int64(delta) + let nanoseconds = UInt32((delta - Double(seconds)) * 1.0e9) + writeInt(&buf, sign * seconds) + writeInt(&buf, nanoseconds) + } +} |