private Dictionary <string, string> PopulateInfo(List <string> keys, byte[] array)
{
const string infoIdText = "INFO";
var infoIdStartIndex = ArraySearcher.GetStartIndexOfText(array, infoIdText);
const int notFoundIndicator = -1;
Dictionary <string, string> info = new Dictionary <string, string>();
if (infoIdStartIndex != notFoundIndicator)
{
var infoDataStartIndex = infoIdStartIndex + infoIdText.Length;
var arrayFromInfoDataStartIndex = array.SubArray(infoDataStartIndex, array.Length - infoDataStartIndex);
info = ArraySearcher.GetKeysAndValues(keys, arrayFromInfoDataStartIndex);
}
return(info);
}
private int GetDataStartIndex(byte[] array)
{
var indexAfterSubChunk2Size = SubChunk2Size.StartIndex + SubChunk2Size.Length;
int dataStartIndex;
if (SubChunk2Id.Value == DataText) //Expected start index for "data"
{
dataStartIndex = indexAfterSubChunk2Size;
}
else
{
const int chunkSizeLength = 4;
var startIndexOfText = ArraySearcher.GetStartIndexOfText(array, DataText);
if (startIndexOfText == -1)
{
throw new ArgumentException($"{DataText} not found.");
}
dataStartIndex = startIndexOfText + DataText.Length + chunkSizeLength;
}
return(dataStartIndex);
}
