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Parse escaped chars #2

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Parse escaped chars #2

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20b42e2
parse escaped chars
schorschii Oct 23, 2023
16e0d2c
improve code
schorschii Oct 24, 2023
19f9e3d
Parse escaped chars (#1)
schorschii Oct 24, 2023
bb59e28
add data parse and int convenience functions (#2)
schorschii Oct 24, 2023
a9fb604
add test
schorschii Nov 6, 2023
1e03cb8
unify testEscapedQuoteString and testEscapedCharsString tests and add…
schorschii Nov 7, 2023
04ccc5e
change variable name
schorschii Nov 7, 2023
80de7e6
parse escaped /
schorschii Nov 7, 2023
41ed2ff
Merge branch 'master' into parse-escaped-chars
schorschii Nov 7, 2023
c033c63
add support for escaped backslash as last char in a string
schorschii Jan 17, 2024
f1e8580
fix edge case where second last char is a backslash
schorschii Jan 17, 2024
b526b0b
revert changes which do not belong to this feature/PR
schorschii Jan 20, 2024
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24 changes: 23 additions & 1 deletion Source/JSON.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -596,7 +596,29 @@ open class JSON {
}
}

let parsedString = String(jsonString[startingIndex ..< index])
var parsedString = String(jsonString[startingIndex ..< index])
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This could stay as a constant and be given a different name and built upon, e.g.
let initialParsedString = String()
let parsedString = initialParsedString.someOperation()

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I'm not sure if this is useful. I mean how would you implement this for the hexEncodedUnicodeCharRegex parsedString? Feel free to push your solution on this branch.

.replacingOccurrences(of: "\\\\", with: "\\", range: nil)
.replacingOccurrences(of: "\\n", with: "\n", range: nil)
.replacingOccurrences(of: "\\t", with: "\t", range: nil)
.replacingOccurrences(of: "\\r", with: "\r", range: nil)
.replacingOccurrences(of: "\\\"", with: "\"", range: nil)
if let regex = try? NSRegularExpression(pattern: "\\\\u[0-9A-Fa-f]{4}") {
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let parsedStringNs = parsedString as NSString
for match in regex.matches(in: parsedString, range: NSMakeRange(0, parsedStringNs.length)) {
let matchString = parsedStringNs.substring(with: match.range) as String
let matchStringHex = matchString.suffix(4)
var replaceData = Data()
if let byte = UInt8(matchStringHex.prefix(2), radix: 16), byte > 0 {
replaceData.append(contentsOf: [byte])
}
if let byte = UInt8(matchStringHex.suffix(2), radix: 16), byte > 0 {
replaceData.append(contentsOf: [byte])
}
if let replacementString = String(data: replaceData, encoding: .isoLatin1) {
parsedString = parsedString.replacingOccurrences(of: matchString, with: replacementString)
}
}
}

guard index != jsonString.endIndex else {
index = startingIndex
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10 changes: 7 additions & 3 deletions Tests/StringTests.swift
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Expand Up @@ -40,14 +40,18 @@ class StringTests: TisanderTest {
XCTAssertEqual(json[0] as? String, "\\a")
}

func testEscapedQuoteString() {
func testEscapedCharsString() {
let input = """
["\\\""]
["\\n", "\\t", "\\r", "\\\"", "\\u00fc"]
"""
var json: Value
do { json = try JSON.parse(string: input) } catch let e { XCTFail((e as? SerializationError)?.rawValue ?? "Unknown exception"); return }

XCTAssertEqual(json[0] as? String, "\\\"")
XCTAssertEqual(json[0] as? String, "\n")
XCTAssertEqual(json[1] as? String, "\t")
XCTAssertEqual(json[2] as? String, "\r")
XCTAssertEqual(json[3] as? String, "\"")
XCTAssertEqual(json[4] as? String, "ü")
}

// func testEscapedSlashString() {
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