public static string CreateStringImpl(char[] val)
{
if (val == null)
{
return(string.Empty);
}
if (val.Length == 0)
{
return(string.Empty);
}
InternalSystem.String result = InternalAllocateStr(val.Length);
//"safe" implementation
//for (int i = 0; i < val.Length; i++)
// result[i] = val[i];
unsafe {
char *ptrres = result._GetBuffer();
for (int i = 0; i < val.Length; i++)
{
*ptrres = val[i];
ptrres++;
}
}
return(result as object as string);
}
public string Substring(int startIndex)
{
if (startIndex == 0)
{
return(this as object as string);
}
if (startIndex < 0 || startIndex > this.length)
{
throw new System.ArgumentOutOfRangeException("startIndex");
}
int newlen = this.length - startIndex;
InternalSystem.String result = InternalAllocateStr(newlen);
unsafe {
char *ptrres = result._GetBuffer();
char *ptr = this._GetBuffer();
ptr = ptr + startIndex;
for (int i = 0; i < newlen; i++)
{
*ptrres = *ptr;
ptrres++;
ptr++;
}
}
return(result as object as string);
}
public static string Concat(InternalSystem.String[] strings)
{
int length = 0;
foreach (String s in strings)
{
length = length + s.Length;
}
InternalSystem.String result = InternalAllocateStr(length);
unsafe {
char *ptrres = result._GetBuffer();
foreach (String s in strings)
{
char *ptr = s._GetBuffer();
for (int i = 0; i < s.length; i++)
{
*ptrres = *ptr;
ptrres++;
ptr++;
}
}
}
return(result as object as string);
}
public static string Concat(InternalSystem.String a, InternalSystem.String b, InternalSystem.String c)
{
InternalSystem.String result = InternalAllocateStr(a.length + b.length + c.length);
unsafe {
char *ptrres = result._GetBuffer();
char *ptr = a._GetBuffer();
for (int i = 0; i < a.length; i++)
{
*ptrres = *ptr;
ptrres++;
ptr++;
}
ptr = b._GetBuffer();
for (int i = 0; i < b.length; i++)
{
*ptrres = *ptr;
ptrres++;
ptr++;
}
ptr = c._GetBuffer();
for (int i = 0; i < c.length; i++)
{
*ptrres = *ptr;
ptrres++;
ptr++;
}
}
return(result as object as string);
}
public string Substring(int startIndex, int length)
{
if (length < 0)
{
throw new System.ArgumentOutOfRangeException("length", "< 0");
}
if (startIndex < 0)
{
throw new System.ArgumentOutOfRangeException("startIndex", "< 0");
}
if (startIndex > this.length - length)
{
throw new System.ArgumentOutOfRangeException("startIndex + length > this.length");
}
if (length == 0)
{
return(String.Empty);
}
InternalSystem.String result = InternalAllocateStr(length);
unsafe {
char *ptrres = result._GetBuffer();
char *ptr = this._GetBuffer();
ptr = ptr + startIndex;
for (int i = 0; i < length; i++)
{
*ptrres = *ptr;
ptrres++;
ptr++;
}
}
return(result as object as string);
}
public static string CreateStringImpl(char[] val, int startIndex, int length)
{
if (val == null)
{
throw new System.ArgumentNullException("val");
}
if (startIndex < 0)
{
throw new System.ArgumentOutOfRangeException("startIndex");
}
if (length < 0)
{
throw new System.ArgumentOutOfRangeException("length");
}
if (startIndex > val.Length - length)
{
throw new System.ArgumentOutOfRangeException("Out of range");
}
if (length == 0)
{
return(string.Empty);
}
InternalSystem.String result = InternalAllocateStr(length);
unsafe {
char *ptrres = result._GetBuffer();
for (int i = startIndex; i < length; i++)
{
*ptrres = val[i];
ptrres++;
}
}
return(result as object as string);
}
