/// <summary>
/// Deals with turning the CppFunction types into V types, function name to snake case, params
/// to snake case and any other data transformations we will need for the V functions
/// </summary>
static ParsedFunction ParsedFunctionFromCppFunction(CppFunction cFunc, Config config)
{
var f = new ParsedFunction
{
Name = cFunc.Name,
VName = V.ToSnakeCase(config.StripFunctionPrefix(cFunc.Name))
};
// hack to fix ghetto forced 'init' module function
if (f.VName == "init")
{
f.VName = config.ModuleName + "_" + f.VName;
}
if (cFunc.ReturnType.GetDisplayName() != "void")
{
f.RetType = cFunc.ReturnType.GetDisplayName();
f.VRetType = V.GetVType(cFunc.ReturnType);
}
foreach (var param in cFunc.Parameters)
{
var p = new ParsedParameter
{
Name = param.Name.EscapeReserved(),
VName = V.ToSnakeCase(config.StripFunctionPrefix(param.Name)).EscapeReserved(),
Type = param.Type.GetDisplayName(),
VType = V.GetVType(param.Type)
};
f.Parameters.Add(p);
}
return(f);
}
static void WriteCFunction(StreamWriter writer, ParsedFunction func)
{
writer.Write($"fn C.{func.Name}(");
foreach (var p in func.Parameters)
{
writer.Write($"{p.Name} {p.VType}");
if (func.Parameters.Last() != p)
{
writer.Write(", ");
}
}
writer.Write(")");
if (func.RetType != null)
{
writer.Write($" {func.VRetType}");
}
writer.WriteLine();
}
static void WriteVFunction(StreamWriter writer, ParsedFunction func)
{
// first, V function def
writer.WriteLine("[inline]");
writer.Write($"pub fn {func.VName}(");
foreach (var p in func.Parameters)
{
// special case for byteptr which we convert to string for the function def
if (p.VType == "byteptr")
{
writer.Write($"{p.VName} string");
}
else
{
writer.Write($"{p.VName} {p.VType}");
}
if (func.Parameters.Last() != p)
{
writer.Write(", ");
}
}
writer.Write(")");
if (func.VRetType != null)
{
if (func.VRetType == "byteptr")
{
writer.WriteLine(" string {");
}
else
{
writer.WriteLine($" {func.VRetType} {{");
}
}
else
{
writer.WriteLine(" {");
}
// now the function body calling the C function
writer.Write("\t");
if (func.VRetType != null)
{
writer.Write("return ");
// special case for byteptr, which we cast to string
if (func.VRetType == "byteptr")
{
writer.Write("string(");
}
}
writer.Write($"C.{func.Name}(");
foreach (var p in func.Parameters)
{
// special case for byteptr which was converted to string above
if (p.VType == "byteptr")
{
writer.Write($"{p.VName}.str");
}
else
{
writer.Write($"{p.VName}");
}
if (func.Parameters.Last() != p)
{
writer.Write(", ");
}
}
// close the string cast if we are returning a byteptr cast to string
if (func.VRetType == "byteptr")
{
writer.Write(")");
}
writer.WriteLine(")");
writer.WriteLine("}");
writer.WriteLine();
}