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mod: av2bv方法修改

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This commit is contained in:
guozhigq
2024-02-01 00:32:52 +08:00
parent 89a43b1285
commit e24ccc16fa
1 changed files with 18 additions and 5 deletions
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23
lib/utils/id_utils.dart
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@ -13,7 +13,20 @@ class IdUtils {
/// av转bv /// av转bv
static String av2bv(int aid) { static String av2bv(int aid) {
List<String> bytes = List.filled(12, '0', growable: false); List<String> bytes = [
'B',
'V',
'1',
'0',
'0',
'0',
'0',
'0',
'0',
'0',
'0',
'0'
];
int bvIndex = bytes.length - 1; int bvIndex = bytes.length - 1;
BigInt tmp = (MAX_AID | BigInt.from(aid)) ^ XOR_CODE; BigInt tmp = (MAX_AID | BigInt.from(aid)) ^ XOR_CODE;
while (tmp > BigInt.zero) { while (tmp > BigInt.zero) {
@ -21,13 +34,13 @@ class IdUtils {
tmp = tmp ~/ BASE; tmp = tmp ~/ BASE;
bvIndex -= 1; bvIndex -= 1;
} }
final tmpValue = bytes[3]; String tmpSwap = bytes[3];
bytes[3] = bytes[9]; bytes[3] = bytes[9];
bytes[9] = tmpValue; bytes[9] = tmpSwap;
final tmpValue2 = bytes[4]; tmpSwap = bytes[4];
bytes[4] = bytes[7]; bytes[4] = bytes[7];
bytes[7] = tmpValue2; bytes[7] = tmpSwap;
return bytes.join(); return bytes.join();
} }