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/* -*- C++ -*- */
// ======================================================================
//
// The actual conversion methods are covered by the copyright information
// below.
// Chad Elliott 4/28/2005
//
// Copyright 2001-2004 Unicode, Inc.
//
// Limitations on Rights to Redistribute This Code
//
// Unicode, Inc. hereby grants the right to freely use the information
// supplied in this file in the creation of products supporting the
// Unicode Standard, and to make copies of this file in any form
// for internal or external distribution as long as this notice
// remains attached.
//
// ======================================================================
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
ACE_INLINE bool
ACE_UTF16_Encoding_Converter::is_legal_utf8 (const ACE_Byte* source,
size_t length) const
{
ACE_Byte a;
const ACE_Byte* srcptr = source + length;
switch (length)
{
default:
return false;
// Everything else falls through when "true"...
case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
case 2: if ((a = (*--srcptr)) > 0xBF) return false;
switch (*source)
{
// no fall-through in this inner switch
case 0xE0:
if (a < 0xA0)
return false;
break;
case 0xED:
if (a > 0x9F)
return false;
break;
case 0xF0:
if (a < 0x90)
return false;
break;
case 0xF4:
if (a > 0x8F)
return false;
break;
default:
if (a < 0x80)
return false;
}
case 1:
if (*source >= 0x80 && *source < 0xC2)
return false;
}
if (*source > 0xF4)
return false;
return true;
}
ACE_END_VERSIONED_NAMESPACE_DECL
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