// re-use string keys using lru cache
string StringFromCache(StringSlice slice)
{
int length = _stringCache.Length;
int lowestCounter = int.MaxValue;
int lowestCounterIndex = 0;
for (int i = 0; i < length; ++i)
{
if (slice.Equals(_stringCache[i].key))
{
_stringCache[i].counter = ++_stringCacheCounter;
return(_stringCache[i].result);
}
var counter = _stringCache[i].counter;
if (counter < lowestCounter)
{
lowestCounter = counter;
lowestCounterIndex = i;
}
}
string result = slice.ToString();
_stringCache[lowestCounterIndex].key = slice;
_stringCache[lowestCounterIndex].result = result;
_stringCache[lowestCounterIndex].counter = ++_stringCacheCounter;
return(result);
}
/// <summary>
/// Attempts to parse a string slice into a variant.
/// </summary>
static public bool TryParse(StringSlice inSlice, bool inbAllowImplicitHash, out Variant outValue)
{
inSlice = inSlice.Trim();
if (inSlice.Length <= 0 || inSlice.Equals("null", true))
{
outValue = Variant.Null;
return(true);
}
if (inSlice.StartsWith(StringHashing.CustomHashPrefix) || inSlice.StartsWith(StringHashing.StringPrefix) ||
(inSlice.Length >= 2 && inSlice.StartsWith('"') && inSlice.EndsWith('"')))
{
StringHash32 hash;
if (StringHash32.TryParse(inSlice, out hash))
{
outValue = hash;
return(true);
}
}
bool bBoolVal;
if (StringParser.TryParseBool(inSlice, out bBoolVal))
{
outValue = new Variant(bBoolVal);
return(true);
}
int intVal;
if (StringParser.TryParseInt(inSlice, out intVal))
{
outValue = new Variant(intVal);
return(true);
}
uint uintVal;
if (StringParser.TryParseUInt(inSlice, out uintVal))
{
outValue = new Variant(uintVal);
return(true);
}
float floatVal;
if (StringParser.TryParseFloat(inSlice, out floatVal))
{
outValue = new Variant(floatVal);
return(true);
}
if (inbAllowImplicitHash)
{
StringHash32 hash;
if (StringHash32.TryParse(inSlice, out hash))
{
outValue = hash;
return(true);
}
}
outValue = default(Variant);
return(false);
}
