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Apply the hex decoder changes covered by HexStringTest

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This commit is contained in:
Taksh 2026-09-04 22:09:36 +05:30
parent a039c7db8f
commit 53fdacca83
1 changed files with 20 additions and 9 deletions
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29
app/src/main/java/com/bitchat/android/util/BinaryEncodingUtils.kt
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@ -19,16 +19,27 @@ fun ByteArray.hexEncodedString(): String {
}
fun String.dataFromHexString(): ByteArray? {
val len = this.length / 2
val data = ByteArray(len)
var index = 0
for (i in 0 until len) {
val hexByte = this.substring(i * 2, i * 2 + 2)
val byte = hexByte.toIntOrNull(16)?.toByte() ?: return null
data[index++] = byte
// Match iOS Data(hexString:): trim, optional 0x/0X prefix, reject odd length.
var hex = this.trim()
if (hex.startsWith("0x", ignoreCase = true)) {
hex = hex.substring(2)
}
if (hex.isEmpty()) {
return ByteArray(0)
}
if (hex.length % 2 != 0) {
return null
}
val len = hex.length / 2
val data = ByteArray(len)
for (i in 0 until len) {
val hexByte = hex.substring(i * 2, i * 2 + 2)
val byte = hexByte.toIntOrNull(16)?.toByte() ?: return null
data[i] = byte
}
return data
}