public static PebbleList AllocateListString(ExecContext context, string debugName = "(List<string> inst)")
{
if (null == _listClassDef)
{
_listClassDef = context.GetClass("List<string>");
}
PebbleList listinst = (PebbleList)_listClassDef.childAllocator();
listinst.classDef = _listClassDef;
listinst.debugName = debugName;
return(listinst);
}
public static void Register(Engine engine)
{
//@ class RegexGroup
// Stores information about a Regex group match. Basically a wrapper for System.Text.RegularExpressions.Group.
{
TypeDef_Class ourType = TypeFactory.GetTypeDef_Class("RegexGroup", null, false);
ClassDef classDef = engine.defaultContext.CreateClass("RegexGroup", ourType, null, null);
classDef.Initialize();
//@ const num index;
// The index of the character at the start of this match.
classDef.AddMember("index", IntrinsicTypeDefs.CONST_NUMBER);
//@ const num length;
// The length of the substring of this match.
classDef.AddMember("length", IntrinsicTypeDefs.CONST_NUMBER);
//@ const string value;
// The substring of this match.
classDef.AddMember("value", IntrinsicTypeDefs.CONST_STRING);
classDef.FinalizeClass(engine.defaultContext);
regexGroupClassDef = classDef;
}
// Make sure the List<RegexGroup> type is registered.
listRegexGroupClassDef = engine.defaultContext.RegisterIfUnregisteredList(regexGroupClassDef.typeDef);
//@ class RegexMatch
// Stores information about a single Regex substring match. Basically a wrapper for System.Text.RegularExpressions.Match.
{
TypeDef_Class ourType = TypeFactory.GetTypeDef_Class("RegexMatch", null, false);
ClassDef classDef = engine.defaultContext.CreateClass("RegexMatch", ourType, null, null);
classDef.Initialize();
//@ const num index;
// The index of the character at the start of this match.
classDef.AddMember("index", IntrinsicTypeDefs.CONST_NUMBER);
//@ const num length;
// The length of the substring of this match.
classDef.AddMember("length", IntrinsicTypeDefs.CONST_NUMBER);
//@ const string value;
// The substring of this match.
classDef.AddMember("value", IntrinsicTypeDefs.CONST_STRING);
//@ List<RegexGroup> groups;
// The regex groups of this match. If there are no groups this will be null.
classDef.AddMember("groups", listRegexGroupClassDef.typeDef);
classDef.FinalizeClass(engine.defaultContext);
regexMatchClassDef = classDef;
}
// ****************************************************************
// Make sure the List<string> type is registered.
ClassDef listStringClassDef = engine.defaultContext.RegisterIfUnregisteredList(IntrinsicTypeDefs.STRING);
// Make sure List<RegexMatch> is registered.
listMatchClassDef = engine.defaultContext.RegisterIfUnregisteredList(regexMatchClassDef.typeDef);
// ****************************************************************
//@ class Regex
// Provides static functions that implement regular expression matching for strings. Basically a wrapper for System.Text.RegularExpressions.Regex.
{
TypeDef_Class ourType = TypeFactory.GetTypeDef_Class("Regex", null, false);
ClassDef classDef = engine.defaultContext.CreateClass("Regex", ourType, null, null, true, true);
classDef.Initialize();
// ***
//@ static bool IsMatch(string input, string expression)
// Returns true if input matches the given regular expression.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
return(Regex.IsMatch(a, b));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("IsMatch", newValue.valType, newValue, true);
}
//@ static RegexMatch Match(string input, string pattern);
// Returns the first match of the given pattern in the input string, or null if no match.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string input = (string)args[0];
string pattern = (string)args[1];
Match match = Regex.Match(input, pattern);
if (match.Success)
{
ClassValue matchInst = regexMatchClassDef.Allocate(context);
Variable index = matchInst.GetByName("index");
Variable length = matchInst.GetByName("length");
Variable value = matchInst.GetByName("value");
index.value = Convert.ToDouble(match.Index);
length.value = Convert.ToDouble(match.Length);
value.value = match.Value;
return(matchInst);
}
return(null);
};
FunctionValue newValue = new FunctionValue_Host(regexMatchClassDef.typeDef, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Match", newValue.valType, newValue, true);
}
//@ static List<RegexMatch> Matches(string input, string pattern);
// Returns a list of all the matches of the given regular expression in the input string, or null if no matches found.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string input = (string)args[0];
string pattern = (string)args[1];
MatchCollection matchCol = Regex.Matches(input, pattern);
if (0 == matchCol.Count)
{
return(null);
}
ClassValue matchListInst = listMatchClassDef.Allocate(context);
PebbleList pebbleList = matchListInst as PebbleList;
foreach (Match match in matchCol)
{
ClassValue matchInst = regexMatchClassDef.Allocate(context);
Variable index = matchInst.GetByName("index");
Variable length = matchInst.GetByName("length");
Variable value = matchInst.GetByName("value");
index.value = Convert.ToDouble(match.Index);
length.value = Convert.ToDouble(match.Length);
value.value = match.Value;
// Note: In this C# regex library, 0 is always the default group (it is the whole match).
// That doesn't seem to be a regex standard, and it's entirely rendundant, so I'm only
// taking the non-default groups. match.groups is 0 when there are no non-default groups.
if (match.Groups.Count > 1)
{
ClassValue groupListInst = listRegexGroupClassDef.Allocate(context);
PebbleList groupList = groupListInst as PebbleList;
matchInst.GetByName("groups").value = groupListInst;
for (int ii = 1; ii < match.Groups.Count; ++ii)
{
Group group = match.Groups[ii];
ClassValue groupInst = regexGroupClassDef.Allocate(context);
groupInst.GetByName("index").value = Convert.ToDouble(group.Index);
groupInst.GetByName("length").value = Convert.ToDouble(group.Length);
groupInst.GetByName("value").value = group.Value;
groupList.list.Add(new Variable("(made my Regex::Matches)", groupInst.classDef.typeDef, groupInst));
}
}
pebbleList.list.Add(new Variable("(Regex::Matches)", regexMatchClassDef.typeDef, matchInst));
}
return(matchListInst);
};
FunctionValue newValue = new FunctionValue_Host(listMatchClassDef.typeDef, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Matches", newValue.valType, newValue, true);
}
//@ static string Replace(string input, string pattern, string replacement);
// Replace any matches of the given pattern in the input string with the replacement string.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string input = (string)args[0];
string pattern = (string)args[1];
string replacement = (string)args[2];
return(Regex.Replace(input, pattern, replacement));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Replace", newValue.valType, newValue, true);
}
//@ static List<string> Split(string input, string pattern);
// Splits an input string into an array of substrings at the positions defined by a regular expression match.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string input = (string)args[0];
string pattern = (string)args[1];
string[] splitArray = Regex.Split(input, pattern);
ClassValue inst = listStringClassDef.Allocate(context);
inst.debugName = "(Regex::Split result)";
PebbleList list = (PebbleList)inst;
foreach (string str in splitArray)
{
list.list.Add(new Variable(null, IntrinsicTypeDefs.STRING, str));
}
return(inst);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.LIST_STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Split", newValue.valType, newValue, true);
}
// ***
classDef.FinalizeClass(engine.defaultContext);
}
UnitTests.testFuncDelegates.Add("RegexLib", RunTests);
}
public static void Register(Engine engine)
{
//@ class List<T>
TypeDef_Class ourType = TypeFactory.GetTypeDef_Class("List", new ArgList {
IntrinsicTypeDefs.TEMPLATE_0
}, false);
ClassDef classDef = engine.defaultContext.CreateClass("List", ourType, null, new List <string> {
"T"
});
classDef.childAllocator = () => {
return(new PebbleList());
};
classDef.Initialize();
//@ List<T> Add(T newValue, ...) or List<T> Push(T newValue, ...)
// Adds one or more elements to the end of the list.
// Cannot be used in a foreach loop.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
PebbleList scope = thisScope as PebbleList;
if (scope.enumeratingCount > 0)
{
context.SetRuntimeError(RuntimeErrorType.ForeachModifyingContainer, "Add: Attempt to modify a list that is being enumerated by a foreach loop.");
return(null);
}
var list = scope.list;
var listType = (TypeDef_Class)scope.classDef.typeDef;
var elementType = listType.genericTypes[0];
for (int ii = 0; ii < args.Count; ++ii)
{
object ret = args[ii];
list.Add(new Variable(null, elementType, ret));
}
return(thisScope);
};
FunctionValue_Host newValue = new FunctionValue_Host(ourType, new ArgList {
IntrinsicTypeDefs.TEMPLATE_0
}, eval, true, ourType);
classDef.AddMemberLiteral("Add", newValue.valType, newValue);
classDef.AddMemberLiteral("Push", newValue.valType, newValue);
}
//@ List<T> Clear()
// Removes all elements from the list.
// Cannot be used in a foreach loop.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
PebbleList pebList = thisScope as PebbleList;
if (pebList.enumeratingCount > 0)
{
context.SetRuntimeError(RuntimeErrorType.ForeachModifyingContainer, "Clear: Attempt to modify a list that is being enumerated by a foreach loop.");
return(null);
}
var list = pebList.list;
list.Clear();
return(thisScope);
};
FunctionValue_Host newValue = new FunctionValue_Host(ourType, new ArgList {
}, eval, false, ourType);
classDef.AddMemberLiteral("Clear", newValue.valType, newValue);
}
//@ num Count()
// Returns the number of elements in the list.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
var list = (thisScope as PebbleList).list;
return(System.Convert.ToDouble(list.Count));
};
FunctionValue_Host newValue = new FunctionValue_Host(IntrinsicTypeDefs.NUMBER, new ArgList {
}, eval, false, ourType);
classDef.AddMemberLiteral("Count", newValue.valType, newValue);
}
//@ T Get(num index)
// Returns the value of the element of the list at the given index.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
double dix = (double)args[0];
int ix = (int)dix;
var list = (thisScope as PebbleList).list;
// Bounds checking.
if (ix < 0 || ix >= list.Count)
{
context.SetRuntimeError(RuntimeErrorType.ArrayIndexOutOfBounds, "Get: Index " + ix + " out of bounds of array of length " + list.Count + ".");
return(null);
}
return(list[ix].value);
};
FunctionValue_Host newValue = new FunctionValue_Host(IntrinsicTypeDefs.TEMPLATE_0, new ArgList {
IntrinsicTypeDefs.NUMBER
}, eval, false, ourType);
classDef.AddMemberLiteral("Get", newValue.valType, newValue);
}
//@ List<T> Insert(num index, T item)
// Inserts a new element into the list at the given index. Existing elements at and after the given index are pushed further down the list.
// Cannot be used in a foreach loop.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
PebbleList scope = thisScope as PebbleList;
if (scope.enumeratingCount > 0)
{
context.SetRuntimeError(RuntimeErrorType.ForeachModifyingContainer, "Insert: Attempt to modify a list that is being enumerated by a foreach loop.");
return(null);
}
var list = scope.list;
var listType = (TypeDef_Class)scope.classDef.typeDef;
var elementType = listType.genericTypes[0];
var indexDouble = (double)args[0];
var item = args[1];
var index = Convert.ToInt32(indexDouble);
if (index < 0 || index > list.Count)
{
context.SetRuntimeError(RuntimeErrorType.ArrayIndexOutOfBounds, "Insert: array index out of bounds.");
return(null);
}
list.Insert(index, new Variable(null, elementType, item));
return(thisScope);
};
FunctionValue_Host newValue = new FunctionValue_Host(ourType, new ArgList {
IntrinsicTypeDefs.NUMBER, IntrinsicTypeDefs.TEMPLATE_0
}, eval, false, ourType);
classDef.AddMemberLiteral("Insert", newValue.valType, newValue);
}
//@ T Pop()
// Returns the value of the last element of the list and removes it from the list.
// Cannot be used in a foreach loop.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
PebbleList pebList = thisScope as PebbleList;
if (pebList.enumeratingCount > 0)
{
context.SetRuntimeError(RuntimeErrorType.ForeachModifyingContainer, "Pop: Attempt to remove an element from a list that is being enumerated in a foreach loop.");
return(null);
}
var list = pebList.list;
int ix = list.Count - 1;
if (ix < 0)
{
context.SetRuntimeError(RuntimeErrorType.ArrayIndexOutOfBounds, "Pop: List is empty.");
return(null);
}
var result = list[ix].value;
list.RemoveAt(ix);
return(result);
};
FunctionValue_Host newValue = new FunctionValue_Host(IntrinsicTypeDefs.TEMPLATE_0, new ArgList {
}, eval, false, ourType);
classDef.AddMemberLiteral("Pop", newValue.valType, newValue);
}
//@ List<T> RemoveAt(num index)
// Removes element at the given index, and returns the list.
// Cannot be used in a foreach loop.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
double dix = (double)args[0];
int ix = (int)dix;
PebbleList pebList = thisScope as PebbleList;
if (pebList.enumeratingCount > 0)
{
context.SetRuntimeError(RuntimeErrorType.ForeachModifyingContainer, "RemoveAt: Attempt to modify a list that is being enumerated by a foreach loop.");
return(null);
}
var list = pebList.list;
if (ix < 0 || ix >= list.Count)
{
context.SetRuntimeError(RuntimeErrorType.ArrayIndexOutOfBounds, "RemoveAt: Index " + ix + " out of bounds of array of length " + list.Count + ".");
return(null);
}
list.RemoveAt(ix);
return(thisScope);
};
FunctionValue_Host newValue = new FunctionValue_Host(ourType, new ArgList {
IntrinsicTypeDefs.NUMBER
}, eval, false, ourType);
classDef.AddMemberLiteral("RemoveAt", newValue.valType, newValue);
}
//@ List<T> RemoveRange(num start, num count)
// Removes elements in the given range of indices, and returns the list.
// Cannot be used in a foreach loop.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
double dstart = (double)args[0];
int start = (int)dstart;
double dcount = (double)args[1];
int count = (int)dcount;
PebbleList pebList = thisScope as PebbleList;
if (pebList.enumeratingCount > 0)
{
context.SetRuntimeError(RuntimeErrorType.ForeachModifyingContainer, "RemoveRange: Attempt to modify a list that is being enumerated by a foreach loop.");
return(null);
}
var list = pebList.list;
if (start < 0 || start >= list.Count)
{
context.SetRuntimeError(RuntimeErrorType.ArrayIndexOutOfBounds, "RemoveRange: Start " + start + " out of bounds of array of length " + list.Count + ".");
return(null);
}
if (count < 0)
{
context.SetRuntimeError(RuntimeErrorType.ArrayIndexOutOfBounds, "RemoveRange: Count (" + count + ") cannot be negative.");
return(null);
}
if ((start + count) >= list.Count)
{
context.SetRuntimeError(RuntimeErrorType.ArrayIndexOutOfBounds, "RemoveRange: Count " + count + " exceeds array length (" + list.Count + ").");
return(null);
}
list.RemoveRange(start, count);
return(thisScope);
};
FunctionValue_Host newValue = new FunctionValue_Host(ourType, new ArgList {
IntrinsicTypeDefs.NUMBER, IntrinsicTypeDefs.NUMBER
}, eval, false, ourType);
classDef.AddMemberLiteral("RemoveRange", newValue.valType, newValue);
}
//@ List<T> Reverse()
// Reverses the list and returns it.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
var list = (thisScope as PebbleList).list;
list.Reverse();
return(thisScope);
};
FunctionValue_Host newValue = new FunctionValue_Host(ourType, new ArgList {
}, eval, false, ourType);
classDef.AddMemberLiteral("Reverse", newValue.valType, newValue);
}
//@ List<T> Set(num index, T newValue)
// Changes the value of the element at the given index, and returns the list.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
double dix = (double)args[0];
int ix = (int)dix;
object value = args[1];
var list = (thisScope as PebbleList).list;
// Bounds checking.
if (ix < 0 || ix >= list.Count)
{
context.SetRuntimeError(RuntimeErrorType.ArrayIndexOutOfBounds, "Set: Index " + ix + " out of bounds of array of length " + list.Count + ".");
return(null);
}
list[ix].value = value;
return(thisScope);
};
FunctionValue_Host newValue = new FunctionValue_Host(ourType, new ArgList {
IntrinsicTypeDefs.NUMBER, IntrinsicTypeDefs.TEMPLATE_0
}, eval, false, ourType);
classDef.AddMemberLiteral("Set", newValue.valType, newValue);
}
//@ List<T> Shuffle()
// Shuffles the list, putting the elements in random order.
// Returns the list.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
var list = (thisScope as PebbleList).list;
Random rng = new Random();
int n = list.Count;
while (n > 1)
{
--n;
int k = rng.Next(n + 1);
Variable value = list[k];
list[k] = list[n];
list[n] = value;
}
return(thisScope);
};
FunctionValue_Host newValue = new FunctionValue_Host(ourType, new ArgList {
}, eval, false, ourType);
classDef.AddMemberLiteral("Shuffle", newValue.valType, newValue);
}
//@ List<T> Sort(functype<num(T, T>)> comparator)
// Sorts the list using the given comparator function.
// The comparator should behave the same as a C# Comparer. The first argument should be earlier in the
// list than the second, return a number < 0. If It should be later, return a number > 0. If their order
// is irrelevant, return 0.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
var list = (thisScope as PebbleList).list;
if (null == args[0])
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "Sort: comparator may not be null.");
return(null);
}
FunctionValue comparator = (FunctionValue)args[0];
List <object> argvals = new List <object>();
argvals.Add(0);
argvals.Add(0);
Comparison <Variable> hostComparator = new Comparison <Variable>(
(a, b) => {
argvals[0] = a.value;
argvals[1] = b.value;
// Note we use null instead of thisScope here. There is no way the sort function could be a
// class member because Sort's signature only takes function's whose type has no class.
double result = (double)comparator.Evaluate(context, argvals, null);
return(Convert.ToInt32(result));
}
);
list.Sort(hostComparator);
return(thisScope);
};
TypeDef_Function comparatorType = TypeFactory.GetTypeDef_Function(IntrinsicTypeDefs.NUMBER, new ArgList {
IntrinsicTypeDefs.TEMPLATE_0, IntrinsicTypeDefs.TEMPLATE_0
}, -1, false, null, false, false);
FunctionValue_Host newValue = new FunctionValue_Host(ourType, new ArgList {
comparatorType
}, eval, false, ourType);
classDef.AddMemberLiteral("Sort", newValue.valType, newValue);
}
//@ string ThisToScript(string prefix)
// ThisToScript is used by Serialize. A classes' ThisToScript function should return code which can rebuild the class.
// Note that it's only the content of the class, not the "new A" part. ie., it's the code that goes in the defstructor.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string result = "";
string prefix = (string)args[0] + "\t";
var list = (thisScope as PebbleList).list;
for (int ii = 0; ii < list.Count; ++ii)
{
result += prefix + "Add(" + CoreLib.ValueToScript(context, list[ii].value, prefix + "\t", false) + ");\n";
}
return(result);
};
FunctionValue_Host newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false, ourType);
classDef.AddMemberLiteral("ThisToScript", newValue.valType, newValue);
}
//@ string ToString()
// Returns a string representation of at least the first few elements of the list.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
var list = (thisScope as PebbleList).list;
string result = "List(" + list.Count + ")[";
for (int ii = 0; ii < Math.Min(4, list.Count); ++ii)
{
if (ii > 0)
{
result += ", ";
}
result += CoreLib.ValueToString(context, list[ii].value, true);
}
if (list.Count > 4)
{
result += ", ...";
}
return(result + "]");
};
FunctionValue_Host newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
}, eval, false, ourType);
classDef.AddMemberLiteral("ThisToString", newValue.valType, newValue);
}
classDef.FinalizeClass(engine.defaultContext);
UnitTests.testFuncDelegates.Add("CoreList", RunTests);
}
public static void Register(Engine engine)
{
//@ class String
TypeDef_Class ourType = TypeFactory.GetTypeDef_Class("String", null, false);
ClassDef classDef = engine.defaultContext.CreateClass("String", ourType, null, null, true);
classDef.Initialize();
// This makes sure List<num> is registered in the type library, as this class uses it and we can't rely
// scripts to register it.
engine.defaultContext.RegisterIfUnregisteredList(IntrinsicTypeDefs.NUMBER);
//@ static num CompareTo(string, string)
// Wraps C# CompareTo function, which essentially returns a number < 0 if a comes before b
// alphabetically, > 0 if a comes after b, and 0 if they are identical.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
return(Convert.ToDouble(a.CompareTo(b)));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.NUMBER, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("CompareTo", newValue.valType, newValue, true);
}
//@ static string Concat(any[, ...])
// Converts all arguments to strings and concatenates them. Same as ToString.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
return(CoreLib.StandardPrintFunction(context, args));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.ANY
}, eval, true);
classDef.AddMemberLiteral("Concat", newValue.valType, newValue, true);
}
//@ static bool EndsWith(string s, string search)
// Wrapper for C# EndsWith. Returns true if s ends with search.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
return(a.EndsWith(b));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("EndsWith", newValue.valType, newValue, true);
}
//@ static bool Equals(string, string)
// Returns true iff the strings are exactly equal. The same thing as using the == operator.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
return(a.Equals(b));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Equals", newValue.valType, newValue, true);
}
//@ static bool EqualsI(string, string)
// Returns true if the strings are equal, ignoring case. Equivalent to the ~= operator.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
return(a.ToLower().Equals(b.ToLower()));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("EqualsI", newValue.valType, newValue, true);
}
//@ static string Format(string[, any, ...])
// Generated formatted strings. Wrapper for C# String.Format(string, object[]). See documentation of that function for details.
// Putting weird things like Lists or functions into the args will produce undefined results.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string source = (string)args[0];
Object[] a = new Object[args.Count - 1];
args.CopyTo(1, a, 0, args.Count - 1);
string result = "";
try {
result = String.Format(source, a);
} catch (Exception e) {
context.SetRuntimeError(RuntimeErrorType.NativeException, e.ToString());
return(null);
}
return(result);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.ANY
}, eval, true);
classDef.AddMemberLiteral("Format", newValue.valType, newValue, true);
}
//@ static List<string> GetCharList(string)
// Returns a list of strings containing one character of the input string.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string source = (string)args[0];
PebbleList list = PebbleList.AllocateListString(context, "String::GetCharList result");
foreach (char c in source.ToCharArray())
{
list.list.Add(new Variable(null, IntrinsicTypeDefs.STRING, Convert.ToString(c)));
}
return(list);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.LIST_STRING, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("GetCharList", newValue.valType, newValue, true);
}
//@ static List<num> GetUnicode(string)
// Returns the Unicode numeric values for the characters in the input string.
// Returns an empty list if the string is empty.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string source = (string)args[0];
PebbleList list = PebbleList.AllocateListString(context, "String::GetUnicode result");
foreach (char c in source.ToCharArray())
{
list.list.Add(new Variable(null, IntrinsicTypeDefs.NUMBER, Convert.ToDouble(Convert.ToInt32(c))));
}
return(list);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.LIST_NUMBER, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("GetUnicode", newValue.valType, newValue, true);
}
//@ static num IndexOfChar(string toBeSearched, string searchChars, num startIndex = 0)
// Returns the index of the first instance of any of the characters in search.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
int startIndex = Convert.ToInt32((double)args[2]);
if (0 == a.Length || 0 == b.Length)
{
return(-1.0);
}
int lowestIx = Int32.MaxValue;
foreach (char c in b)
{
int ix = a.IndexOf(c, startIndex);
if (ix >= 0 && ix < lowestIx)
{
lowestIx = ix;
}
}
if (lowestIx < Int32.MaxValue)
{
return(Convert.ToDouble(lowestIx));
}
return(-1.0);
};
List <Expr_Literal> defaultArgVals = new List <Expr_Literal>();
defaultArgVals.Add(null);
defaultArgVals.Add(null);
defaultArgVals.Add(new Expr_Literal(null, 0.0, IntrinsicTypeDefs.NUMBER));
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.NUMBER, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.NUMBER
}, eval, false, null, true, defaultArgVals);
classDef.AddMemberLiteral("IndexOfChar", newValue.valType, newValue, true);
}
//@ static num IndexOfString(string toBeSearched, string searchString, num startIndex = 0)
// Returns the index of the first instance of the entire search string.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
int startIndex = Convert.ToInt32((double)args[2]);
if (0 == a.Length || 0 == b.Length)
{
return(-1.0);
}
int ix = a.IndexOf(b, startIndex);
return(Convert.ToDouble(ix));
};
List <Expr_Literal> defaultArgVals = new List <Expr_Literal>();
defaultArgVals.Add(null);
defaultArgVals.Add(null);
defaultArgVals.Add(new Expr_Literal(null, 0.0, IntrinsicTypeDefs.NUMBER));
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.NUMBER, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.NUMBER
}, eval, false, null, true, defaultArgVals);
classDef.AddMemberLiteral("IndexOfString", newValue.valType, newValue, true);
}
//@ static num LastIndexOfChar(string toBeSearched, string searchChars, num startIndex = -1)
// Returns the index of the last instance of the entire search string,
// If startIndex is >= 0, starts searching backwards from the given index.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
int startIndex = Convert.ToInt32((double)args[2]);
if (0 == a.Length || 0 == b.Length)
{
return(-1.0);
}
if (startIndex < 0)
{
startIndex = a.Length - 1;
}
else if (startIndex >= a.Length)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "LastIndexOfChar startIndex argument is greater than the length of the string.");
return(null);
}
char[] chars = b.ToCharArray();
int lowestIx = Int32.MaxValue;
foreach (char c in b)
{
int ix = a.LastIndexOfAny(chars, startIndex);
if (ix >= 0 && ix < lowestIx)
{
lowestIx = ix;
}
}
if (lowestIx < Int32.MaxValue)
{
return(Convert.ToDouble(lowestIx));
}
return(-1.0);
};
List <Expr_Literal> defaultArgVals = new List <Expr_Literal>();
defaultArgVals.Add(null);
defaultArgVals.Add(null);
defaultArgVals.Add(new Expr_Literal(null, -1.0, IntrinsicTypeDefs.NUMBER));
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.NUMBER, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.NUMBER
}, eval, false, null, true, defaultArgVals);
classDef.AddMemberLiteral("LastIndexOfChar", newValue.valType, newValue, true);
}
//@ static num LastIndexOfString(string toBeSearched, string searchString, num startIndex = -1)
// Returns the index of the last instance of the entire search string,
// If startIndex is > 0, starts searching backwards from the given index.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
int startIndex = Convert.ToInt32((double)args[2]);
if (0 == a.Length || 0 == b.Length)
{
return(-1.0);
}
if (startIndex < 0)
{
startIndex = a.Length - 1;
}
else if (startIndex >= a.Length)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "LastIndexOfString startIndex argument is greater than the length of the string.");
return(null);
}
int ix = a.LastIndexOf(b, startIndex);
return(Convert.ToDouble(ix));
};
List <Expr_Literal> defaultArgVals = new List <Expr_Literal>();
defaultArgVals.Add(null);
defaultArgVals.Add(null);
defaultArgVals.Add(new Expr_Literal(null, -1.0, IntrinsicTypeDefs.NUMBER));
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.NUMBER, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.NUMBER
}, eval, false, null, true, defaultArgVals);
classDef.AddMemberLiteral("LastIndexOfString", newValue.valType, newValue, true);
}
//@ static num Length(string)
// Returns the length of the string.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
return(Convert.ToDouble(a.Length));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.NUMBER, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Length", newValue.valType, newValue, true);
}
//@ static string PadLeft(string, num n, string pad)
// Returns s with n instances of string pad to the left.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
double nd = (double)args[1];
int n = Convert.ToInt32(nd);
string p = (string)args[2];
if (0 == p.Length)
{
p = " ";
}
char c = p[0];
return(a.PadLeft(n, c));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.NUMBER, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("PadLeft", newValue.valType, newValue, true);
}
//@ static string PadRight(string s, num n, string pad)
// Returns s with n instances of string pad to the left.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
double nd = (double)args[1];
int n = Convert.ToInt32(nd);
string p = (string)args[2];
if (0 == p.Length)
{
p = " ";
}
char c = p[0];
return(a.PadRight(n, c));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.NUMBER, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("PadRight", newValue.valType, newValue, true);
}
//@ static string Replace(string str, string find, string replace)
// Replaces all instances of the given string with the replacement string.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string find = (string)args[1];
string replace = (string)args[2];
if (0 == find.Length)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "Find argument to Replace() cannot be the empty string.");
return(null);
}
return(a.Replace(find, replace));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Replace", newValue.valType, newValue, true);
}
//@ static List<string> Split(string str, List<string> separators = null)
// Splits input string into a list of strings given the provided separators.
// If no separators are provided, uses the newline character.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string[] splitted;
if (null == args[1])
{
splitted = a.Split(_defaultSeparators, StringSplitOptions.None);
}
else
{
PebbleList delimsList = args[1] as PebbleList;
if (0 == delimsList.list.Count)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "String::Split : Separators list cannot be empty.");
return(null);
}
List <string> dlist = delimsList.GetNativeList();
// Usually I like to wrap native functions with a try-catch but I couldn't find a
// way to make this throw an exception.
splitted = a.Split(dlist.ToArray(), StringSplitOptions.None);
}
PebbleList list = PebbleList.AllocateListString(context, "String::Split result");
foreach (string s in splitted)
{
list.list.Add(new Variable(null, IntrinsicTypeDefs.STRING, s));
}
return(list);
};
List <Expr_Literal> defaults = new List <Expr_Literal>();
defaults.Add(null);
defaults.Add(new Expr_Literal(null, null, IntrinsicTypeDefs.NULL));
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.LIST_STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.LIST_STRING
}, eval, false, null, true, defaults);
classDef.AddMemberLiteral("Split", newValue.valType, newValue, true);
}
//@ static bool StartsWith(string s, string start)
// Returns true if s starts with start.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
string b = (string)args[1];
return(a.StartsWith(b));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("StartsWith", newValue.valType, newValue, true);
}
//@ static string Substring(string, startIx, length)
// Returns a substring of the input, starting at startIx, that is length characters long.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
double b = (double)args[1];
double c = (double)args[2];
int start = Convert.ToInt32(b);
int len = Convert.ToInt32(c);
if (start < 0 || len < 0)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "Numeric arguments to Substring cannot be negative.");
return(null);
}
if (start + len > a.Length)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "Substring attempting to read past end string.");
return(null);
}
return(a.Substring(start, len));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.NUMBER, IntrinsicTypeDefs.NUMBER
}, eval, false);
classDef.AddMemberLiteral("Substring", newValue.valType, newValue, true);
}
//@ static string SubstringLeft(string str, num length)
// Returns the left 'length' characters of str.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
double b = (double)args[1];
int len = Convert.ToInt32(b);
if (len < 0)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "Numeric arguments to Substring cannot be negative.");
return(null);
}
if (len > a.Length)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "Substring attempting to read past end string.");
return(null);
}
return(a.Substring(0, len));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.NUMBER
}, eval, false);
classDef.AddMemberLiteral("SubstringLeft", newValue.valType, newValue, true);
}
//@ static string SubstringRight(string, start)
// Returns the right part of the string starting at 'start'.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
double b = (double)args[1];
int start = Convert.ToInt32(b);
if (start < 0)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "Numeric arguments to Substring cannot be negative.");
return(null);
}
if (start >= a.Length)
{
context.SetRuntimeError(RuntimeErrorType.ArgumentInvalid, "Substring attempting to read past end string.");
return(null);
}
return(a.Substring(a.Length - start));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.NUMBER
}, eval, false);
classDef.AddMemberLiteral("SubstringRight", newValue.valType, newValue, true);
}
//@ static string ToLower(string)
// Converts the string to lowercase.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
return(a.ToLower());
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("ToLower", newValue.valType, newValue, true);
}
//@ static string ToUpper(string)
// Converts the string to uppercase.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
return(a.ToUpper());
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("ToUpper", newValue.valType, newValue, true);
}
//@ static string Trim(string)
// Removes leading and trailing whitespace characters.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string a = (string)args[0];
return(a.Trim());
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Trim", newValue.valType, newValue, true);
}
//@ static string UnicodeToString(List<num>)
// Takes a list of numeric Unicode character codes, converts them to characters, concatenates them, and returns the resultant string.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
PebbleList list = args[0] as PebbleList;
string result = "";
try {
foreach (Variable v in list.list)
{
double d = (double)v.value;
result += Convert.ToChar(Convert.ToInt32(d));
}
} catch (Exception e) {
context.SetRuntimeError(RuntimeErrorType.NativeException, e.ToString());
return(null);
}
return(result);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
IntrinsicTypeDefs.LIST_NUMBER
}, eval, false);
classDef.AddMemberLiteral("UnicodeToString", newValue.valType, newValue, true);
}
classDef.FinalizeClass(engine.defaultContext);
UnitTests.testFuncDelegates.Add("StringLib", RunTests);
}
public static void Register(Engine engine)
{
// *** Register required types.
List <ITypeDef> genericTypes = new ArgList();
genericTypes.Add(IntrinsicTypeDefs.STRING);
// This code makes sure that Result<string> is a registered class and type.
TypeDef_Class resultTypeDef = TypeFactory.GetTypeDef_Class("Result", genericTypes, false);
ClassDef resultClassDef = engine.defaultContext.RegisterIfUnregisteredTemplate(resultTypeDef);
// This does List<string>.
ClassDef listStringClassDef = engine.defaultContext.RegisterIfUnregisteredList(IntrinsicTypeDefs.STRING);
// ***
//@ class File
TypeDef_Class ourType = TypeFactory.GetTypeDef_Class("File", null, false);
ClassDef classDef = engine.defaultContext.CreateClass("File", ourType, null, null, true);
classDef.Initialize();
//@ const string lastError;
// Stores the message of the last error generated by this library.
classDef.AddMemberLiteral("lastError", IntrinsicTypeDefs.CONST_STRING, "", true);
Variable lastErrorVar = null;
//@ static string ClearLastError()
// Clears File::lastError, returning its previous value.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string lastError = (string)lastErrorVar.value;
lastErrorVar.value = "";
return(lastError);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
}, eval, false);
classDef.AddMemberLiteral("ClearLastError", newValue.valType, newValue, true);
}
//@ static bool Copy(string source, string dest)
// Copies a file from source to dest.
// Returns false and sets lastError on error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string source = (string)args[0];
string dest = (string)args[1];
lastErrorVar.value = "";
try {
File.Copy(source, dest);
} catch (Exception e) {
lastErrorVar.value = "Copy: " + e.ToString();
return(false);
}
return(true);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Copy", newValue.valType, newValue, true);
}
//@ static bool CreateDir(string path)
// Creates directory.
// Returns false and sets lastError on error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
lastErrorVar.value = "";
// Doesn't throw exceptions.
if (Directory.Exists(path))
{
lastErrorVar.value = "CreateDir: Directory already exists.";
return(false);
}
try {
Directory.CreateDirectory(path);
} catch (Exception e) {
lastErrorVar.value = "CreateDir: " + e.ToString();
return(false);
}
return(true);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("CreateDir", newValue.valType, newValue, true);
}
//@ static bool Delete(string path)
// Returns true if file deleted.
// Returns false and sets lastError on error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
// Doesn't throw exceptions.
if (!File.Exists(path))
{
lastErrorVar.value = "Delete: File not found.";
return(false);
}
try {
File.Delete(path);
} catch (Exception e) {
lastErrorVar.value = "Delete: " + e.ToString();
return(false);
}
lastErrorVar.value = "";
return(true);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Delete", newValue.valType, newValue, true);
}
//@ static bool DeleteDir(string path)
// Returns true if file deleted.
// Returns false and sets lastError on error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
// Doesn't throw exceptions.
if (!Directory.Exists(path))
{
lastErrorVar.value = "DeleteDir: Directory not found.";
return(false);
}
try {
Directory.Delete(path);
} catch (Exception e) {
lastErrorVar.value = "DeleteDir: " + e.ToString();
return(false);
}
lastErrorVar.value = "";
return(true);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("DeleteDir", newValue.valType, newValue, true);
}
//@ static string GetCurrentDirectory()
// Returns the full path of the current directory.
// Returns "" and sets lastError on error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string result;
try {
result = Directory.GetCurrentDirectory();
} catch (Exception e) {
lastErrorVar.value = "GetCurrentDirectory: " + e.ToString();
return("");
}
lastErrorVar.value = "";
return(result);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.STRING, new ArgList {
}, eval, false);
classDef.AddMemberLiteral("GetCurrentDirectory", newValue.valType, newValue, true);
}
//@ static List<string> GetDirs(string path)
// Returns list of subdirectories of path.
// Returns null and sets lastError on error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
// Doesn't throw exceptions.
if (!Directory.Exists(path))
{
lastErrorVar.value = "GetDirs: Directory not found.";
return(null);
}
string[] files;
try {
files = Directory.GetDirectories(path);
} catch (Exception e) {
lastErrorVar.value = "GetDirs: " + e.ToString();
return(null);
}
ClassValue inst = listStringClassDef.Allocate(context);
inst.debugName = "(GetDirs result)";
PebbleList list = (PebbleList)inst;
foreach (string file in files)
{
list.list.Add(new Variable(null, IntrinsicTypeDefs.STRING, file));
}
lastErrorVar.value = "";
return(inst);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.LIST_STRING, new List <ITypeDef> {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("GetDirs", newValue.valType, newValue, true);
}
//@ static List<string> GetFiles(string path)
// Returns list of all files in the given directory path.
// Filenames are NOT prefaced by path.
// Returns null and sets lastError on error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
if (!Directory.Exists(path))
{
lastErrorVar.value = "GetFiles: Directory not found.";
return(null);
}
string[] files;
try {
files = Directory.GetFiles(path);
} catch (Exception e) {
lastErrorVar.value = "GetFiles: " + e.ToString();
return(null);
}
ClassValue inst = listStringClassDef.Allocate(context);
inst.debugName = "(GetFiles result)";
PebbleList list = (PebbleList)inst;
int pathLen = path.Length + 1;
foreach (string file in files)
{
string justFile = file.Substring(pathLen);
list.list.Add(new Variable(null, IntrinsicTypeDefs.STRING, justFile));
}
lastErrorVar.value = "";
return(inst);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.LIST_STRING, new List <ITypeDef> {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("GetFiles", newValue.valType, newValue, true);
}
//@ static bool Exists(string path)
// Returns true if file exists, false if it doesn't.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
// Doesn't throw exceptions.
return(File.Exists(path));
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Exists", newValue.valType, newValue, true);
}
//@ static bool Move(string source, string dest)
// Move a file from source to dest.
// Returns false and sets lastError on error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string source = (string)args[0];
string dest = (string)args[1];
lastErrorVar.value = "";
try {
File.Move(source, dest);
} catch (Exception e) {
lastErrorVar.value = "Move: " + e.ToString();
return(false);
}
return(true);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Move", newValue.valType, newValue, true);
}
//@ static Result<string> Read(string path)
// Reads content of file as text. Returns an instance of Result<string>.
// If succeeded, status = 0, value = file contents.
// On error, status != 0, message = an error message.
{
// Note that this function cannot use lastError because strings cannot be null.
// This is why ReadLines can just return a List<string>: the list can indicate error by being null.
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
//ClassValue inst = resultClassDef.childAllocator();
ClassValue inst = resultClassDef.Allocate(context);
Variable status = inst.GetByName("status");
Variable value = inst.GetByName("value");
Variable message = inst.GetByName("message");
string result;
try {
result = File.ReadAllText(path);
} catch (Exception e) {
status.value = -1.0;
message.value = "Read: " + e.ToString();
return(inst);
}
// The docs don't say this ever returns null, but just in case.
if (null == result)
{
status.value = -1.0;
message.value = "Read: File.ReadAllText returned null.";
}
value.value = result;
return(inst);
};
FunctionValue newValue = new FunctionValue_Host(resultClassDef.typeDef, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Read", newValue.valType, newValue, true);
}
//@ static List<string> ReadLines(string path)
// Returns a list containing the lines of the given file.
// On error, returns null and sets last error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
IEnumerable <string> result;
try {
// Note: ReadLines is a little more efficient on memory than ReadAllLines, but the .NET used by Unity 2017 doesn't support it.
// Shouldn't really matter. If you're processing huge files, probably Pebble isn't the way to go.
//result = File.ReadLines(path);
result = File.ReadAllLines(path);
} catch (Exception e) {
lastErrorVar.value = "ReadLines: " + e.ToString();
return(null);
}
// The docs don't say this ever returns null, but just in case.
if (null == result)
{
lastErrorVar.value = "ReadLines: File.ReadLines returned null.";
return(null);
}
ClassDef listClassDef = context.GetClass("List<string>");
ClassValue listinst = listClassDef.childAllocator();
listinst.classDef = listClassDef;
listinst.debugName = "(ReadLines result)";
PebbleList list = (PebbleList)listinst;
foreach (string line in result)
{
list.list.Add(new Variable(null, IntrinsicTypeDefs.STRING, line));
}
lastErrorVar.value = "";
return(listinst);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.LIST_STRING, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("ReadLines", newValue.valType, newValue, true);
}
//@ static bool SetCurrentDirectory(string newDir)
// Changes the current directory. Returns true on success.
// Returns false and sets lastError on error.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
try {
Directory.SetCurrentDirectory(path);
} catch (Exception e) {
lastErrorVar.value = "SetCurrentDirectory: " + e.ToString();
return(false);
}
lastErrorVar.value = "";
return(true);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("SetCurrentDirectory", newValue.valType, newValue, true);
}
//@ static bool Write(string path, string contents)
// Writes contents to file. If file exists it is overwritten.
// Returns true on success.
// On error returns false and sets lastError.
{
FunctionValue_Host.EvaluateDelegate eval = (context, args, thisScope) => {
string path = (string)args[0];
string contents = (string)args[1];
try {
File.WriteAllText(path, contents);
} catch (Exception e) {
lastErrorVar.value = "Write: " + e.ToString();
return(false);
}
lastErrorVar.value = "";
return(true);
};
FunctionValue newValue = new FunctionValue_Host(IntrinsicTypeDefs.BOOL, new ArgList {
IntrinsicTypeDefs.STRING, IntrinsicTypeDefs.STRING
}, eval, false);
classDef.AddMemberLiteral("Write", newValue.valType, newValue, true);
}
classDef.FinalizeClass(engine.defaultContext);
lastErrorVar = classDef.staticVars[0];
UnitTests.testFuncDelegates.Add("FileLib", RunTests);
}
public bool Write(ExecContext context, PebbleStreamHelper stream, object value)
{
Pb.Assert(!(value is Variable));
if (null != textWriter)
{
string s = CoreLib.ValueToString(context, value, false);
textWriter.Write(s);
return(true);
}
if (null == value)
{
writer.Write("null");
}
else if (value is FunctionValue)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Cannot serialize functions.");
return(false);
}
else if (value is bool)
{
writer.Write((bool)value);
}
else if (value is double)
{
writer.Write((double)value);
}
else if (value is string)
{
writer.Write((string)value);
}
else if (value is PebbleList)
{
PebbleList plist = value as PebbleList;
// - Serialize full type, ie "List<string>".
writer.Write(plist.classDef.name);
// - Serialize count.
writer.Write(plist.list.Count);
// - Finally, serialize each object.
foreach (Variable listvar in plist.list)
{
if (!Write(context, stream, listvar.value))
{
return(false);
}
}
}
else if (value is PebbleDictionary)
{
PebbleDictionary dic = value as PebbleDictionary;
// - class name
writer.Write(dic.classDef.name);
// - count
writer.Write((Int32)dic.dictionary.Count);
// - each key, value
foreach (var kvp in dic.dictionary)
{
if (!Write(context, stream, kvp.Key))
{
return(false);
}
if (!Write(context, stream, kvp.Value.value))
{
return(false);
}
}
}
else if (value is ClassValue_Enum)
{
ClassValue_Enum enumVal = value as ClassValue_Enum;
writer.Write(enumVal.classDef.name);
writer.Write(enumVal.GetName());
}
else if (value is ClassValue)
{
ClassValue classVal = value as ClassValue;
MemberRef serMemRef = classVal.classDef.GetMemberRef(null, "Serialize", ClassDef.SEARCH.NORMAL);
if (serMemRef.isInvalid)
{
context.SetRuntimeError(RuntimeErrorType.SerializeInvalidClass, "Class '" + classVal.classDef.name + "' cannot be serialized because it doesn't implement a serialization function.");
return(false);
}
writer.Write(classVal.classDef.name);
Variable serVar = classVal.Get(serMemRef);
FunctionValue serFunc = serVar.value as FunctionValue;
object result = serFunc.Evaluate(context, new List <object> {
stream
}, classVal);
if (context.IsRuntimeErrorSet())
{
return(false);
}
if (result is bool && false == (bool)result)
{
context.SetRuntimeError(RuntimeErrorType.SerializeFailed, "Serialize function of class '" + classVal.classDef.name + "' returned false.");
return(false);
}
}
else
{
throw new Exception("Internal error: Unexpected type of value in stream Write.");
}
return(true);
}
public bool Read(ExecContext context, PebbleStreamHelper stream, Variable variable)
{
if (variable.type.IsConst())
{
context.SetRuntimeError(RuntimeErrorType.SerializeIntoConst, "Cannot serialize into const variables.");
return(false);
}
if (variable.type.CanStoreValue(context, IntrinsicTypeDefs.BOOL))
{
variable.value = reader.ReadBoolean();
}
else if (variable.type == IntrinsicTypeDefs.NUMBER)
{
variable.value = reader.ReadDouble();
}
else if (variable.type == IntrinsicTypeDefs.STRING)
{
variable.value = reader.ReadString();
}
else if (variable.type.GetName().StartsWith("List<"))
{
string listTypeName = reader.ReadString();
if ("null" == listTypeName)
{
variable.value = null;
return(true);
}
// Is it possible that the specific generic class isn't registered yet.
if (!EnsureGenericIsRegistered(context, listTypeName))
{
return(false);
}
ClassDef listDef = context.GetClass(listTypeName);
if (null == listDef)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Cannot deserialize list type '" + listTypeName + "' because it is unknown.");
return(false);
}
ClassValue listValue = listDef.Allocate(context);
PebbleList newlist = listValue as PebbleList;
variable.value = listValue;
ITypeDef elementType = listDef.typeDef.genericTypes[0];
int count = reader.ReadInt32();
for (int ii = 0; ii < count; ++ii)
{
Variable newelem = new Variable(null, elementType);
if (!Read(context, stream, newelem))
{
return(false);
}
newlist.list.Add(newelem);
}
}
else if (variable.type.GetName().StartsWith("Dictionary<"))
{
string listTypeName = reader.ReadString();
if ("null" == listTypeName)
{
variable.value = null;
return(true);
}
// Is it possible that the specific generic class isn't registered yet.
if (!EnsureGenericIsRegistered(context, listTypeName))
{
return(false);
}
ClassDef listDef = context.GetClass(listTypeName);
if (null == listDef)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Cannot deserialize list type '" + listTypeName + "' because it is unknown.");
return(false);
}
ClassValue listValue = listDef.Allocate(context);
PebbleDictionary newlist = listValue as PebbleDictionary;
variable.value = listValue;
ITypeDef keyType = listDef.typeDef.genericTypes[0];
ITypeDef valueType = listDef.typeDef.genericTypes[1];
int count = reader.ReadInt32();
Variable tempKeyVar = new Variable("tempKeyVar", keyType);
for (int ii = 0; ii < count; ++ii)
{
if (!Read(context, stream, tempKeyVar))
{
return(false);
}
Variable newelem = new Variable(null, valueType);
if (!Read(context, stream, newelem))
{
return(false);
}
newlist.dictionary.Add(tempKeyVar.value, newelem);
}
}
else if (variable.type is TypeDef_Enum)
{
string enumName = reader.ReadString();
string valueName = reader.ReadString();
// This happens.
ITypeDef streamedType = context.GetTypeByName(enumName);
if (null == streamedType)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Attempt to load saved enum of unknown type '" + enumName + "'.");
return(false);
}
// I can't get this to happen.
if (!(streamedType is TypeDef_Enum))
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Type '" + enumName + "' saved as something other than an enum, but attempted to stream into an enum variable.");
return(false);
}
ClassDef enumClassDef = context.GetClass(enumName);
Pb.Assert(null != enumClassDef, "Somehow we got a type for an enum but not the def.");
ClassDef_Enum enumDef = enumClassDef as ClassDef_Enum;
Pb.Assert(null != enumClassDef, "Registered type is enum but def is classdef.");
// This happens.
ClassValue_Enum cve = enumDef.enumDef.GetValue(valueName);
if (null == cve)
{
context.SetRuntimeError(RuntimeErrorType.EnumValueNotFound, "Enum '" + enumName + "' does not have saved value '" + valueName + "'.");
return(false);
}
variable.value = cve;
}
else if (variable.type is TypeDef_Class)
{
TypeDef_Class varType = variable.type as TypeDef_Class;
// Get class name.
string streamClassName = reader.ReadString();
if ("null" == streamClassName)
{
variable.value = null;
return(true);
}
ITypeDef streamedType = context.GetTypeByName(streamClassName);
if (null == streamedType)
{
context.SetRuntimeError(RuntimeErrorType.SerializeUnknownType, "Serialized type '" + streamClassName + "' not found.");
return(false);
}
if (!varType.CanStoreValue(context, streamedType))
{
context.SetRuntimeError(RuntimeErrorType.SerializeTypeMismatch, "Cannot deserialize a '" + streamClassName + "' into a variable of type '" + varType.GetName() + "'.");
return(false);
}
TypeDef_Class streamedClassType = streamedType as TypeDef_Class;
Pb.Assert(null != streamedClassType, "Somehow a streamed type is not a class but *can* be stored in a class type?!");
ClassDef streamedClassDef = context.GetClass(streamClassName);
Pb.Assert(null != streamedClassDef, "Somehow we got a type for a class but not the def.");
MemberRef serMemRef = streamedClassDef.GetMemberRef(null, "Serialize", ClassDef.SEARCH.NORMAL);
if (serMemRef.isInvalid)
{
context.SetRuntimeError(RuntimeErrorType.SerializeInvalidClass, "Serialize function of class '" + streamClassName + "' not found.");
return(false);
}
ClassValue streamedClassValue = streamedClassDef.Allocate(context);
Variable serFuncVar = streamedClassValue.Get(serMemRef);
FunctionValue serFuncVal = serFuncVar.value as FunctionValue;
serFuncVal.Evaluate(context, new List <object>()
{
stream
}, streamedClassValue);
if (context.IsRuntimeErrorSet())
{
return(false);
}
variable.value = streamedClassValue;
}
else
{
throw new Exception("Internal error: Unexpected type of value in stream Read.");
}
return(true);
}