public AnsiString Insert(int startIndex, AnsiString value)
{
if (value == null) throw new ArgumentNullException();
if ((startIndex < 0) || (startIndex > this.Length)) throw new ArgumentOutOfRangeException();
int len = value.Length + this.Length;
byte[] buffer = new byte[len];
Array.Copy(value._array, 0, buffer, startIndex, value.Length);
Array.Copy(this._array, 0, buffer, 0, startIndex);
Array.Copy(this._array, this._array.Length - startIndex, buffer, startIndex + value.Length, this._array.Length - startIndex);
return new AnsiString(buffer);
}
/// <summary>按内容比较</summary>
public bool Equals(AnsiString value)
{
if (value == null) return false;
if (this.Length != value.Length) return false;
return (AnsiString.Compare(this, value) == 0);
}
/// <summary>从新克隆一份对象(不是复制一份引用)</summary>
public static AnsiString Copy(AnsiString str)
{
byte[] buffer = new byte[str.Length];
Array.Copy(str._array, buffer, str.Length);
return new AnsiString(buffer);
}
/// <summary>strcmp优化</summary>
public bool EndsWith(AnsiString value)
{
if (value.Length > this.Length) return false;
unsafe
{
fixed (byte* pA = &this._array[this.Length - value.Length])
fixed (byte* pB = &value._array[0])
if (CString.strncmp((sbyte*)pA, (sbyte*)pB, (uint)value.Length) == 0)
return true;
}
return false;
}
/// <summary>按内容比较两个字符串是否相同</summary>
public static int Compare(AnsiString strA, AnsiString strB)
{
if (strA.Length != strB.Length) return strA.Length - strB.Length;
unsafe
{
fixed (byte* pA = &strA._array[0])
fixed (byte* pB = &strB._array[0])
return CString.memcmp(pA, pB, (uint)strA.Length);
}
}
