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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2021 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import GenUtils
func getAge(
from data: String,
into result: inout [(ClosedRange<UInt32>, [UInt8])]
) {
for line in data.split(separator: "\n") {
// Skip comments
guard !line.hasPrefix("#") else {
continue
}
let info = line.split(separator: "#")
let components = info[0].split(separator: ";")
let scalars: ClosedRange<UInt32>
let filteredScalars = components[0].filter { !$0.isWhitespace }
// If we have . appear, it means we have a legitimate range. Otherwise,
// it's a singular scalar.
if filteredScalars.contains(".") {
let range = filteredScalars.split(separator: ".")
scalars = UInt32(range[0], radix: 16)! ... UInt32(range[1], radix: 16)!
} else {
let scalar = UInt32(filteredScalars, radix: 16)!
scalars = scalar ... scalar
}
let version = components[1].filter { !$0.isWhitespace }
let parts = version.split(separator: ".")
let major = UInt8(parts[0])!
let minor = UInt8(parts[1])!
result.append((scalars, [major, minor]))
}
}
func emitAge(
data: [(ClosedRange<UInt32>, [UInt8])],
into result: inout String
) {
var uniqueAges: Set<[UInt8]> = []
for (_, age) in data {
uniqueAges.insert(age)
}
let ages = uniqueAges.map {
UInt16($0[0]) | (UInt16($0[1]) << 8)
}
emitCollection(ages, name: "_swift_stdlib_ages_data", into: &result)
emitCollection(
data,
name: "_swift_stdlib_ages",
type: "__swift_uint64_t",
into: &result
) {
var value: UInt64 = UInt64($0.0.lowerBound)
let age = UInt16($0.1[0]) | (UInt16($0.1[1]) << 8)
let ageIndex = ages.firstIndex(of: age)!
value |= UInt64(ageIndex) << 21
value |= UInt64($0.0.count - 1) << 32
return "0x\(String(value, radix: 16, uppercase: true))"
}
}
func generateAgeProp(into result: inout String) {
let derivedAge = readFile("Data/DerivedAge.txt")
var ageData: [(ClosedRange<UInt32>, [UInt8])] = []
getAge(from: derivedAge, into: &ageData)
emitAge(data: flatten(ageData), into: &result)
}
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