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//
// MonoEncoding.cs
//
// Author:
// Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2005 Novell, Inc. http://www.novell.com
//
using System;
using System.Runtime.InteropServices;
using System.Text;
namespace I18N.Common
{
[Serializable]
public abstract class MonoEncoding : Encoding
{
readonly int win_code_page;
public MonoEncoding (int codePage)
: this (codePage, 0)
{
}
public MonoEncoding (int codePage, int windowsCodePage)
: base (codePage)
{
win_code_page = windowsCodePage;
}
public override int WindowsCodePage {
get { return win_code_page != 0 ? win_code_page : base.WindowsCodePage; }
}
#if NET_2_0
[CLSCompliant (false)]
public unsafe void HandleFallback (ref EncoderFallbackBuffer buffer,
char* chars, ref int charIndex, ref int charCount,
byte* bytes, ref int byteIndex, ref int byteCount)
{
if (buffer == null)
buffer = EncoderFallback.CreateFallbackBuffer ();
if (Char.IsSurrogate (chars [charIndex]) && charCount > 0 &&
Char.IsSurrogate (chars [charIndex + 1])) {
buffer.Fallback (chars [charIndex], chars [charIndex + 1], charIndex);
charIndex++;
charCount--;
}
else
buffer.Fallback (chars [charIndex], charIndex);
char [] tmp = new char [buffer.Remaining];
int idx = 0;
while (buffer.Remaining > 0)
tmp [idx++] = buffer.GetNextChar ();
fixed (char* tmparr = tmp) {
byteIndex += GetBytes (tmparr, tmp.Length, bytes + byteIndex, byteCount);
}
}
#endif
// Get the bytes that result from encoding a character buffer.
public override int GetByteCount (
char [] chars, int index, int count)
{
if (chars == null)
throw new ArgumentNullException ("chars");
if (index < 0 || index > chars.Length)
throw new ArgumentOutOfRangeException
("index", Strings.GetString ("ArgRange_Array"));
if (count < 0 || count > (chars.Length - index))
throw new ArgumentOutOfRangeException
("count", Strings.GetString ("ArgRange_Array"));
if (count == 0)
return 0;
unsafe {
fixed (char* cptr = chars) {
return GetByteCountImpl (
cptr + index, count);
}
}
}
// Get the bytes that result from encoding a character buffer.
public override int GetBytes (
char [] chars, int charIndex, int charCount,
byte [] bytes, int byteIndex)
{
if (chars == null)
throw new ArgumentNullException ("chars");
if (bytes == null)
throw new ArgumentNullException ("bytes");
if (charIndex < 0 || charIndex > chars.Length)
throw new ArgumentOutOfRangeException
("charIndex", Strings.GetString ("ArgRange_Array"));
if (charCount < 0 || charCount > (chars.Length - charIndex))
throw new ArgumentOutOfRangeException
("charCount", Strings.GetString ("ArgRange_Array"));
if (byteIndex < 0 || byteIndex > bytes.Length)
throw new ArgumentOutOfRangeException
("byteIndex", Strings.GetString ("ArgRange_Array"));
if (bytes.Length - byteIndex < charCount)
throw new ArgumentException (Strings.GetString ("Arg_InsufficientSpace"), "bytes");
if (charCount == 0)
return 0;
unsafe {
fixed (char* cptr = chars) {
fixed (byte* bptr = bytes) {
return GetBytesImpl (
cptr + charIndex,
charCount,
bptr + byteIndex,
bytes.Length - byteIndex);
}
}
}
}
// Convenience wrappers for "GetBytes".
public override int GetBytes (string s, int charIndex, int charCount,
byte [] bytes, int byteIndex)
{
// Validate the parameters.
if(s == null)
throw new ArgumentNullException("s");
if(bytes == null)
throw new ArgumentNullException("bytes");
if(charIndex < 0 || charIndex > s.Length)
throw new ArgumentOutOfRangeException
("charIndex",
Strings.GetString("ArgRange_StringIndex"));
if(charCount < 0 || charCount > (s.Length - charIndex))
throw new ArgumentOutOfRangeException
("charCount",
Strings.GetString("ArgRange_StringRange"));
if(byteIndex < 0 || byteIndex > bytes.Length)
throw new ArgumentOutOfRangeException
("byteIndex",
Strings.GetString("ArgRange_Array"));
if((bytes.Length - byteIndex) < charCount)
throw new ArgumentException
(Strings.GetString("Arg_InsufficientSpace"), "bytes");
if (charCount == 0 || bytes.Length == byteIndex)
return 0;
unsafe {
fixed (char* cptr = s) {
fixed (byte* bptr = bytes) {
return GetBytesImpl (
cptr + charIndex,
charCount,
bptr + byteIndex,
bytes.Length - byteIndex);
}
}
}
}
#if NET_2_0
public unsafe override int GetByteCount (char* chars, int count)
{
return GetByteCountImpl (chars, count);
}
public unsafe override int GetBytes (char* chars, int charCount,
byte* bytes, int byteCount)
{
return GetBytesImpl (chars, charCount, bytes, byteCount);
}
#endif
[CLSCompliant (false)]
public unsafe abstract int GetByteCountImpl (char* chars, int charCount);
[CLSCompliant (false)]
public unsafe abstract int GetBytesImpl (char* chars, int charCount,
byte* bytes, int byteCount);
}
public abstract class MonoEncoder : Encoder
{
MonoEncoding encoding;
public MonoEncoder (MonoEncoding encoding)
{
this.encoding = encoding;
}
public override int GetByteCount (
char [] chars, int index, int count, bool refresh)
{
if (chars == null)
throw new ArgumentNullException ("chars");
if (index < 0 || index > chars.Length)
throw new ArgumentOutOfRangeException
("index", Strings.GetString ("ArgRange_Array"));
if (count < 0 || count > (chars.Length - index))
throw new ArgumentOutOfRangeException
("count", Strings.GetString ("ArgRange_Array"));
if (count == 0)
return 0;
unsafe {
fixed (char* cptr = chars) {
return GetByteCountImpl (
cptr + index, count, refresh);
}
}
}
public override int GetBytes (char [] chars, int charIndex, int charCount, byte [] bytes, int byteIndex, bool flush)
{
if (chars == null)
throw new ArgumentNullException ("chars");
if (bytes == null)
throw new ArgumentNullException ("bytes");
if (charIndex < 0 || charIndex > chars.Length)
throw new ArgumentOutOfRangeException
("charIndex", Strings.GetString ("ArgRange_Array"));
if (charCount < 0 || charCount > (chars.Length - charIndex))
throw new ArgumentOutOfRangeException
("charCount", Strings.GetString ("ArgRange_Array"));
if (byteIndex < 0 || byteIndex > bytes.Length)
throw new ArgumentOutOfRangeException
("byteIndex", Strings.GetString ("ArgRange_Array"));
if (bytes.Length - byteIndex < charCount)
throw new ArgumentException (Strings.GetString ("Arg_InsufficientSpace"), "bytes");
if (charCount == 0)
return 0;
unsafe {
fixed (char* cptr = chars) {
fixed (byte* bptr = bytes) {
return GetBytesImpl (cptr + charIndex,
charCount,
bptr + byteIndex,
bytes.Length - byteIndex,
flush);
}
}
}
}
public unsafe abstract int GetByteCountImpl (char* chars, int charCount, bool refresh);
public unsafe abstract int GetBytesImpl (char* chars, int charCount, byte* bytes, int byteCount, bool refresh);
#if NET_2_0
public unsafe override int GetBytes (char* chars, int charCount, byte* bytes, int byteCount, bool flush)
{
return GetBytesImpl (chars, charCount, bytes, byteCount, flush);
}
//[CLSCompliant (false)]
public unsafe void HandleFallback (
char* chars, ref int charIndex, ref int charCount,
byte* bytes, ref int byteIndex, ref int byteCount)
{
EncoderFallbackBuffer buffer = FallbackBuffer;
encoding.HandleFallback (ref buffer,
chars, ref charIndex, ref charCount,
bytes, ref byteIndex, ref byteCount);
}
#endif
}
}
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