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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2024 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
extension Unicode {
enum WordBreakProperty: UInt8 {
// We don't store the other properties, so we really don't care about them
// here.
case extend = 0
case format = 1
case katakana = 2
case hebrewLetter = 3
case aLetter = 4
case midNumLet = 5
case midLetter = 6
case midNum = 7
case numeric = 8
case extendNumLet = 9
case wSegSpace = 10
case extendedPictographic = 11
init?(_ str: String) {
switch str {
case "Extend":
self = .extend
case "Format":
self = .format
case "Katakana":
self = .katakana
case "Hebrew_Letter":
self = .hebrewLetter
case "ALetter":
self = .aLetter
case "MidNumLet":
self = .midNumLet
case "MidLetter":
self = .midLetter
case "MidNum":
self = .midNum
case "Numeric":
self = .numeric
case "ExtendNumLet":
self = .extendNumLet
case "WSegSpace":
self = .wSegSpace
case "Extended_Pictographic":
self = .extendedPictographic
default:
return nil
}
}
}
}
struct WordBreakEntry : Comparable {
static func < (lhs: WordBreakEntry, rhs: WordBreakEntry) -> Bool {
return lhs.index < rhs.index
}
let index: Int
let range: ClosedRange<UInt32>
let property: Unicode.WordBreakProperty
}
func getWordBreakPropertyData(
for path: String
) -> [(ClosedRange<UInt32>, Unicode.WordBreakProperty)] {
let data = readFile(path)
var unflattened: [(ClosedRange<UInt32>, Unicode.WordBreakProperty)] = []
for line in data.split(separator: "\n") {
// Skip comments
guard !line.hasPrefix("#") else {
continue
}
// Each line in this file is broken up into two sections:
// 1: Either the singular scalar or a range of scalars who conform to said
// grapheme break property.
// 2: The grapheme break property that said scalar(s) conform to (with
// additional comments noting the character category, name and amount of
// scalars the range represents).
let components = line.split(separator: ";")
// Get the property first because it may be one we don't care about.
let splitProperty = components[1].split(separator: "#")
let filteredProperty = splitProperty[0].filter { !$0.isWhitespace }
guard let gbp = Unicode.WordBreakProperty(filteredProperty) else {
continue
}
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
}
unflattened.append((scalars, gbp))
}
return flatten(unflattened)
}
func emit(
_ data: [WordBreakEntry],
into result: inout String
) {
result += """
#define WORD_BREAK_DATA_COUNT \(data.count)
"""
emitCollection(
data,
name: "_swift_stdlib_words",
type: "__swift_uint32_t",
into: &result
) {
var value = $0.range.lowerBound
value |= UInt32($0.range.count) << 21
return "0x\(String(value, radix: 16, uppercase: true))"
}
emitCollection(
data,
name: "_swift_stdlib_words_data",
type: "__swift_uint8_t",
into: &result
) {
let value = $0.property.rawValue
return "0x\(String(value, radix: 16, uppercase: true))"
}
}
// Main entry point into the word break generator.
func generateWordBreak() {
var result = readFile("Input/WordData.h")
let baseData = getWordBreakPropertyData(for: "Data/15/WordBreakProperty.txt")
let emojiData = getWordBreakPropertyData(for: "Data/15/emoji-data.txt")
var idx = 0
let data = flatten(baseData + emojiData).map { (values) -> WordBreakEntry in
idx += 1
return WordBreakEntry(
index: idx,
range: values.0,
property: values.1
)
}
let reorderedData = eytzingerize(data, dummy: WordBreakEntry(
index: 0,
range: 0...0,
property: .extend
))
emit(reorderedData, into: &result)
result += """
#endif // #ifndef WORD_DATA_H
"""
write(result, to: "Output/Common/WordData.h")
}
generateWordBreak()
|
