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added string reverse method

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User 2025-04-04 12:42:14 +03:00
parent ef0bc6033b
commit 31e811d4d8
1 changed files with 49 additions and 0 deletions
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49
BeefLibs/corlib/src/String.bf
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@ -3025,6 +3025,55 @@ namespace System
return sIdStringLiterals[id];
}
public void Reverse(String strBuffer)
{
int_strsize originalLength = this.mLength;
char8* originalPtr = this.Ptr;
if (originalLength <= 1)
{
strBuffer.Set(.(originalPtr, originalLength));
return;
}
char8* tempBuffer = new:this char8[originalLength]* (?);
defer delete tempBuffer;
int_strsize writeIdx = 0;
int_strsize readPos = originalLength;
while (readPos > 0) {
int_strsize currentReadIdx = readPos - 1;
int_strsize startIdx = currentReadIdx;
char8 c = originalPtr[startIdx];
int8 len = 1;
if (c >= (.)0x80) {
while (startIdx > 0 && ((uint8)originalPtr[startIdx] & 0xC0) == 0x80)
startIdx--;
var (decodedC32, decodedLen) = UTF8.Decode(originalPtr + startIdx, originalLength - startIdx);
if (decodedLen <= 0) {
len = 1;
startIdx = currentReadIdx;
} else {
len = decodedLen;
}
}
Internal.MemCpy(tempBuffer + writeIdx, originalPtr + startIdx, len);
writeIdx += len;
readPos = startIdx;
}
Runtime.Assert(writeIdx == originalLength);
strBuffer.Clear();
strBuffer.Reserve(originalLength);
strBuffer.Append(tempBuffer, originalLength);
}
public struct RawEnumerator : IRefEnumerator<char8*>, IEnumerator<char8>
{
char8* mPtr;