cyf
105 lines
2.9 KiB
C#
105 lines
2.9 KiB
C#
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[UnmanagedFunctionPointer(libcef.CallConv)]
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#if !DEBUG
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[SuppressUnmanagedCodeSecurity]
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#endif
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public delegate void dtor_delegate(char* str);
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/// <summary>
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/// This is useful to pass string without copying.
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/// </summary>
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public cef_string_t(char* str, int length)
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{
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this.str = str;
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this.length = length;
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this.dtor = IntPtr.Zero;
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}
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#if DIAGNOSTICS
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private static readonly bool diagnostics = true;
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private static dtor_delegate bs_dtor_impl;
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private static IntPtr bs_dtor_impl_fp;
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internal static Action<IntPtr, string> OnCreate;
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internal static Action<IntPtr> OnDispose;
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static cef_string_t()
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{
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bs_dtor_impl = new dtor_delegate(dtor_impl);
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bs_dtor_impl_fp = Marshal.GetFunctionPointerForDelegate(bs_dtor_impl);
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}
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private static void dtor_impl(char* str)
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{
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if (OnDispose != null) OnDispose((IntPtr)str);
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Marshal.FreeHGlobal((IntPtr)str);
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}
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private static void copy_impl(string src, cef_string_t* dst)
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{
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NativeMethods.string_clear(dst);
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if (string.IsNullOrEmpty(src))
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{
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if (OnCreate != null) OnCreate(IntPtr.Zero, null);
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dst->str = null;
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dst->length = 0;
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dst->dtor = IntPtr.Zero;
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}
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else
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{
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var ptr = Marshal.StringToHGlobalUni(src);
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if (OnCreate != null) OnCreate((IntPtr)ptr, src);
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dst->str = (char*)ptr;
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dst->length = src.Length;
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dst->dtor = bs_dtor_impl_fp;
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}
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}
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#endif
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public static string ToString(cef_string_t* ptr)
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{
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if (ptr == null)
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{
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return string.Empty;
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}
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return new string(ptr->str, 0, ptr->length);
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}
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public static void Set(string src, cef_string_t* dst, bool copy)
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{
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fixed (char* ptr = src)
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{
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#if DIAGNOSTICS
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if (copy)
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{
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copy_impl(src, dst);
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}
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else
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#endif
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NativeMethods.cef_string_set(ptr, src == null ? 0 : src.Length, dst, copy ? 1 : 0);
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}
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}
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public static void Copy(string src, cef_string_t* dst)
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{
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fixed (char* ptr = src)
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{
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#if DIAGNOSTICS
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if (diagnostics)
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{
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copy_impl(src, dst);
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}
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else
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#endif
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NativeMethods.cef_string_set(ptr, src == null ? 0 : src.Length, dst, 1);
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}
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}
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public static void Clear(cef_string_t* str)
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{
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NativeMethods.cef_string_clear(str);
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}
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