// Token: 0x0600025A RID: 602 RVA: 0x0000B9AC File Offset: 0x00009BAC
private static int AdjustChunkSize(Encoding encoding, int chunkSize, string value, int valueOffset, int targetBytes)
{
int i = MimeCommon.GetByteCount(encoding, value, valueOffset, chunkSize);
if (i > targetBytes)
{
int num = chunkSize * targetBytes / i;
if (num < chunkSize)
{
if (MimeCommon.IsLowSurrogate(value[valueOffset + num]) && MimeCommon.IsHighSurrogate(value[valueOffset + num - 1]))
{
num--;
}
chunkSize = num;
i = MimeCommon.GetByteCount(encoding, value, valueOffset, chunkSize);
}
while (i > targetBytes)
{
num = chunkSize * targetBytes / i;
if (num < chunkSize)
{
chunkSize = num;
}
else
{
chunkSize--;
}
if (MimeCommon.IsLowSurrogate(value[valueOffset + chunkSize]) && MimeCommon.IsHighSurrogate(value[valueOffset + chunkSize - 1]))
{
chunkSize--;
}
i = MimeCommon.GetByteCount(encoding, value, valueOffset, chunkSize);
}
}
if (i < targetBytes - 2 && i != 0)
{
int num2 = 0;
while (valueOffset + chunkSize < value.Length && num2++ < 3)
{
int num3 = 1;
if (MimeCommon.IsHighSurrogate(value[valueOffset + chunkSize]) && valueOffset + chunkSize + 1 < value.Length && MimeCommon.IsLowSurrogate(value[valueOffset + chunkSize + 1]))
{
num3++;
}
i = MimeCommon.GetByteCount(encoding, value, valueOffset, chunkSize + num3);
if (i > targetBytes)
{
break;
}
chunkSize += num3;
}
}
return(chunkSize);
}