kopia lustrzana https://github.com/gopro/gpr
1655 wiersze
56 KiB
C++
1655 wiersze
56 KiB
C++
// =================================================================================================
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// Copyright 2004 Adobe Systems Incorporated
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// All Rights Reserved.
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//
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// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
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// of the Adobe license agreement accompanying it.
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// =================================================================================================
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#include "public/include/XMP_Const.h"
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#define UC_Assert(cond) /* Nothing for now, should be XMP_Assert. */
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#define UC_Throw(msg,id) throw XMP_Error ( id, msg )
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#include "UnicodeConversions.hpp"
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#if SUNOS_SPARC || XMP_IOS_ARM
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#include "string.h"
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#endif
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using namespace std;
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// =================================================================================================
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// *** Look into using asm inlines, e.g. count-leading bits for multi-byte UTF-8.
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CodePoint_to_UTF16_Proc CodePoint_to_UTF16BE = 0;
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CodePoint_to_UTF16_Proc CodePoint_to_UTF16LE = 0;
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CodePoint_from_UTF16_Proc CodePoint_from_UTF16BE = 0;
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CodePoint_from_UTF16_Proc CodePoint_from_UTF16LE = 0;
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UTF8_to_UTF16_Proc UTF8_to_UTF16BE = 0;
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UTF8_to_UTF16_Proc UTF8_to_UTF16LE = 0;
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UTF8_to_UTF32_Proc UTF8_to_UTF32BE = 0;
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UTF8_to_UTF32_Proc UTF8_to_UTF32LE = 0;
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UTF16_to_UTF8_Proc UTF16BE_to_UTF8 = 0;
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UTF16_to_UTF8_Proc UTF16LE_to_UTF8 = 0;
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UTF32_to_UTF8_Proc UTF32BE_to_UTF8 = 0;
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UTF32_to_UTF8_Proc UTF32LE_to_UTF8 = 0;
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UTF8_to_UTF16_Proc UTF8_to_UTF16Native = 0;
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UTF8_to_UTF32_Proc UTF8_to_UTF32Native = 0;
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UTF16_to_UTF8_Proc UTF16Native_to_UTF8 = 0;
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UTF32_to_UTF8_Proc UTF32Native_to_UTF8 = 0;
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UTF16_to_UTF32_Proc UTF16BE_to_UTF32BE = 0;
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UTF16_to_UTF32_Proc UTF16BE_to_UTF32LE = 0;
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UTF16_to_UTF32_Proc UTF16LE_to_UTF32BE = 0;
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UTF16_to_UTF32_Proc UTF16LE_to_UTF32LE = 0;
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UTF32_to_UTF16_Proc UTF32BE_to_UTF16BE = 0;
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UTF32_to_UTF16_Proc UTF32BE_to_UTF16LE = 0;
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UTF32_to_UTF16_Proc UTF32LE_to_UTF16BE = 0;
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UTF32_to_UTF16_Proc UTF32LE_to_UTF16LE = 0;
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// -------------------------------------------------------------------------------------------------
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static size_t swap32to16Offset = 0; // Offset to "convert" a swapped UTF32 pointer into a swapped UTF16 pointer.
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// -------------------------------------------------------------------------------------------------
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static void CodePoint_to_UTF16Nat ( const UTF32Unit cpIn, UTF16Unit * utf16Out, const size_t utf16Len, size_t * utf16Written );
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static void CodePoint_to_UTF16Swp ( const UTF32Unit cpIn, UTF16Unit * utf16Out, const size_t utf16Len, size_t * utf16Written );
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static void CodePoint_from_UTF16Nat ( const UTF16Unit * utf16In, const size_t utf16Len, UTF32Unit * cpOut, size_t * utf16Read );
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static void CodePoint_from_UTF16Swp ( const UTF16Unit * utf16In, const size_t utf16Len, UTF32Unit * cpOut, size_t * utf16Read );
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// -------------------------------------------------------------------------------------------------
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static void UTF8_to_UTF16Nat ( const UTF8Unit * utf8In, const size_t utf8Len,
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UTF16Unit * utf16Out, const size_t utf16Len,
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size_t * utf8Read, size_t * utf16Written );
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static void UTF8_to_UTF16Swp ( const UTF8Unit * utf8In, const size_t utf8Len,
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UTF16Unit * utf16Out, const size_t utf16Len,
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size_t * utf8Read, size_t * utf16Written );
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static void UTF8_to_UTF32Nat ( const UTF8Unit * utf8In, const size_t utf8Len,
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UTF32Unit * utf32Out, const size_t utf32Len,
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size_t * utf8Read, size_t * utf32Written );
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static void UTF8_to_UTF32Swp ( const UTF8Unit * utf8In, const size_t utf8Len,
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UTF32Unit * utf32Out, const size_t utf32Len,
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size_t * utf8Read, size_t * utf32Written );
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// -------------------------------------------------------------------------------------------------
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static void UTF16Nat_to_UTF8 ( const UTF16Unit * utf16In, const size_t utf16Len,
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UTF8Unit * utf8Out, const size_t utf8Len,
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size_t * utf16Read, size_t * utf8Written );
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static void UTF16Swp_to_UTF8 ( const UTF16Unit * utf16In, const size_t utf16Len,
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UTF8Unit * utf8Out, const size_t utf8Len,
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size_t * utf16Read, size_t * utf8Written );
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static void UTF32Nat_to_UTF8 ( const UTF32Unit * utf32In, const size_t utf32Len,
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UTF8Unit * utf8Out, const size_t utf8Len,
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size_t * utf32Read, size_t * utf8Written );
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static void UTF32Swp_to_UTF8 ( const UTF32Unit * utf32In, const size_t utf32Len,
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UTF8Unit * utf8Out, const size_t utf8Len,
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size_t * utf32Read, size_t * utf8Written );
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// -------------------------------------------------------------------------------------------------
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static void UTF16Nat_to_UTF32Nat ( const UTF16Unit * utf16In, const size_t utf16Len,
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UTF32Unit * utf32Out, const size_t utf32Len,
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size_t * utf16Read, size_t * utf32Written );
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static void UTF16Nat_to_UTF32Swp ( const UTF16Unit * utf16In, const size_t utf16Len,
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UTF32Unit * utf32Out, const size_t utf32Len,
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size_t * utf16Read, size_t * utf32Written );
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static void UTF16Swp_to_UTF32Nat ( const UTF16Unit * utf16In, const size_t utf16Len,
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UTF32Unit * utf32Out, const size_t utf32Len,
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size_t * utf16Read, size_t * utf32Written );
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static void UTF16Swp_to_UTF32Swp ( const UTF16Unit * utf16In, const size_t utf16Len,
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UTF32Unit * utf32Out, const size_t utf32Len,
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size_t * utf16Read, size_t * utf32Written );
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// -------------------------------------------------------------------------------------------------
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static void UTF32Nat_to_UTF16Nat ( const UTF32Unit * utf32In, const size_t utf32Len,
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UTF16Unit * utf16Out, const size_t utf16Len,
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size_t * utf32Read, size_t * utf16Written );
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static void UTF32Nat_to_UTF16Swp ( const UTF32Unit * utf32In, const size_t utf32Len,
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UTF16Unit * utf16Out, const size_t utf16Len,
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size_t * utf32Read, size_t * utf16Written );
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static void UTF32Swp_to_UTF16Nat ( const UTF32Unit * utf32In, const size_t utf32Len,
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UTF16Unit * utf16Out, const size_t utf16Len,
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size_t * utf32Read, size_t * utf16Written );
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static void UTF32Swp_to_UTF16Swp ( const UTF32Unit * utf32In, const size_t utf32Len,
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UTF16Unit * utf16Out, const size_t utf16Len,
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size_t * utf32Read, size_t * utf16Written );
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// =================================================================================================
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void InitializeUnicodeConversions()
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{
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UC_Assert ( (sizeof(UTF8Unit) == 1) && (sizeof(UTF16Unit) == 2) && (sizeof(UTF32Unit) == 4) );
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UTF16Unit u16 = 0x00FF;
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bool bigEndian = (*((UTF8Unit*)&u16) == 0);
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UTF8_to_UTF16Native = UTF8_to_UTF16Nat;
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UTF8_to_UTF32Native = UTF8_to_UTF32Nat;
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UTF16Native_to_UTF8 = UTF16Nat_to_UTF8;
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UTF32Native_to_UTF8 = UTF32Nat_to_UTF8;
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if ( bigEndian ) {
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swap32to16Offset = 0;
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CodePoint_to_UTF16BE = CodePoint_to_UTF16Nat;
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CodePoint_to_UTF16LE = CodePoint_to_UTF16Swp;
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CodePoint_from_UTF16BE = CodePoint_from_UTF16Nat;
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CodePoint_from_UTF16LE = CodePoint_from_UTF16Swp;
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UTF8_to_UTF16BE = UTF8_to_UTF16Nat;
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UTF8_to_UTF16LE = UTF8_to_UTF16Swp;
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UTF8_to_UTF32BE = UTF8_to_UTF32Nat;
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UTF8_to_UTF32LE = UTF8_to_UTF32Swp;
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UTF16BE_to_UTF8 = UTF16Nat_to_UTF8;
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UTF16LE_to_UTF8 = UTF16Swp_to_UTF8;
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UTF32BE_to_UTF8 = UTF32Nat_to_UTF8;
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UTF32LE_to_UTF8 = UTF32Swp_to_UTF8;
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UTF16BE_to_UTF32BE = UTF16Nat_to_UTF32Nat;
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UTF16BE_to_UTF32LE = UTF16Nat_to_UTF32Swp;
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UTF16LE_to_UTF32BE = UTF16Swp_to_UTF32Nat;
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UTF16LE_to_UTF32LE = UTF16Swp_to_UTF32Swp;
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UTF32BE_to_UTF16BE = UTF32Nat_to_UTF16Nat;
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UTF32BE_to_UTF16LE = UTF32Nat_to_UTF16Swp;
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UTF32LE_to_UTF16BE = UTF32Swp_to_UTF16Nat;
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UTF32LE_to_UTF16LE = UTF32Swp_to_UTF16Swp;
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} else {
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swap32to16Offset = 1; // ! Offset in UTF16 units!
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CodePoint_to_UTF16BE = CodePoint_to_UTF16Swp;
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CodePoint_to_UTF16LE = CodePoint_to_UTF16Nat;
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CodePoint_from_UTF16BE = CodePoint_from_UTF16Swp;
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CodePoint_from_UTF16LE = CodePoint_from_UTF16Nat;
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UTF8_to_UTF16BE = UTF8_to_UTF16Swp;
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UTF8_to_UTF16LE = UTF8_to_UTF16Nat;
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UTF8_to_UTF32BE = UTF8_to_UTF32Swp;
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UTF8_to_UTF32LE = UTF8_to_UTF32Nat;
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UTF16BE_to_UTF8 = UTF16Swp_to_UTF8;
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UTF16LE_to_UTF8 = UTF16Nat_to_UTF8;
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UTF32BE_to_UTF8 = UTF32Swp_to_UTF8;
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UTF32LE_to_UTF8 = UTF32Nat_to_UTF8;
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UTF16BE_to_UTF32BE = UTF16Swp_to_UTF32Swp;
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UTF16BE_to_UTF32LE = UTF16Swp_to_UTF32Nat;
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UTF16LE_to_UTF32BE = UTF16Nat_to_UTF32Swp;
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UTF16LE_to_UTF32LE = UTF16Nat_to_UTF32Nat;
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UTF32BE_to_UTF16BE = UTF32Swp_to_UTF16Swp;
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UTF32BE_to_UTF16LE = UTF32Swp_to_UTF16Nat;
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UTF32LE_to_UTF16BE = UTF32Nat_to_UTF16Swp;
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UTF32LE_to_UTF16LE = UTF32Nat_to_UTF16Nat;
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}
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} // InitializeUnicodeConversions
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// =================================================================================================
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#if SUNOS_SPARC || XMP_IOS_ARM
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#define DefineAndGetValue(type,inPtr) type inUnit; memcpy ( &inUnit, inPtr, sizeof(type) );
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#else
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#define DefineAndGetValue(type,inPtr) type inUnit = *((type *)inPtr);
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#endif
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static inline UTF16Unit UTF16InSwap ( const void * inPtr )
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{
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DefineAndGetValue ( UTF16Unit, inPtr );
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return (inUnit << 8) | (inUnit >> 8);
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}
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static inline UTF32Unit UTF32InSwap ( const void * inPtr )
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{
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DefineAndGetValue ( UTF32Unit, inPtr );
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return (inUnit << 24) | ((inUnit << 8) & 0x00FF0000) | ((inUnit >> 8) & 0x0000FF00) | (inUnit >> 24);
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}
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static inline void UTF16OutSwap ( UTF16Unit * outPtr, const UTF16Unit value )
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{
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UTF16Unit outUnit = (value << 8) | (value >> 8);
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*outPtr = outUnit;
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}
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static inline void UTF32OutSwap ( UTF32Unit * outPtr, const UTF32Unit value )
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{
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UTF32Unit outUnit = (value << 24) | ((value << 8) & 0x00FF0000) | ((value >> 8) & 0x0000FF00) | (value >> 24);
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*outPtr = outUnit;
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}
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// =================================================================================================
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void SwapUTF16 ( const UTF16Unit * utf16In, UTF16Unit * utf16Out, const size_t utf16Len )
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{
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for ( size_t i = 0; i < utf16Len; ++i ) utf16Out[i] = UTF16InSwap(utf16In+i);
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}
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void SwapUTF32 ( const UTF32Unit * utf32In, UTF32Unit * utf32Out, const size_t utf32Len ) {
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for ( size_t i = 0; i < utf32Len; ++i ) utf32Out[i] = UTF32InSwap(utf32In+i);
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}
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// =================================================================================================
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extern void ToUTF16 ( const UTF8Unit * utf8In, size_t utf8Len, std::string * utf16Str, bool bigEndian )
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{
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UTF8_to_UTF16_Proc Converter = UTF8_to_UTF16LE;
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if ( bigEndian ) Converter = UTF8_to_UTF16BE;
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enum { kBufferSize = 8*1024 };
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UTF16Unit u16Buffer[kBufferSize]; // 16K bytes
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size_t readCount, writeCount;
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utf16Str->erase();
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utf16Str->reserve ( 2*utf8Len ); // As good a guess as any.
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while ( utf8Len > 0 ) {
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Converter ( utf8In, utf8Len, u16Buffer, kBufferSize, &readCount, &writeCount );
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if ( writeCount == 0 ) UC_Throw ( "Incomplete Unicode at end of string", kXMPErr_BadXML );
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utf16Str->append ( (const char *)u16Buffer, writeCount*2 );
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utf8In += readCount;
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utf8Len -= readCount;
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}
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} // ToUTF16
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// =================================================================================================
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extern void ToUTF16Native ( const UTF8Unit * utf8In, size_t utf8Len, std::string * utf16Str )
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{
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enum { kBufferSize = 8*1024 };
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UTF16Unit u16Buffer[kBufferSize]; // 16K bytes
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size_t readCount, writeCount;
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utf16Str->erase();
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utf16Str->reserve ( 2*utf8Len ); // As good a guess as any.
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while ( utf8Len > 0 ) {
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UTF8_to_UTF16Nat ( utf8In, utf8Len, u16Buffer, kBufferSize, &readCount, &writeCount );
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if ( writeCount == 0 ) UC_Throw ( "Incomplete Unicode at end of string", kXMPErr_BadXML );
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utf16Str->append ( (const char *)u16Buffer, writeCount*2 );
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utf8In += readCount;
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utf8Len -= readCount;
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}
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} // ToUTF16Native
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// =================================================================================================
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extern void ToUTF32 ( const UTF8Unit * utf8In, size_t utf8Len, std::string * utf32Str, bool bigEndian )
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{
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UTF8_to_UTF32_Proc Converter = UTF8_to_UTF32LE;
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if ( bigEndian ) Converter = UTF8_to_UTF32BE;
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enum { kBufferSize = 4*1024 };
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UTF32Unit u32Buffer[kBufferSize]; // 16K bytes
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size_t readCount, writeCount;
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utf32Str->erase();
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utf32Str->reserve ( 4*utf8Len ); // As good a guess as any.
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while ( utf8Len > 0 ) {
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Converter ( utf8In, utf8Len, u32Buffer, kBufferSize, &readCount, &writeCount );
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if ( writeCount == 0 ) UC_Throw ( "Incomplete Unicode at end of string", kXMPErr_BadXML );
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utf32Str->append ( (const char *)u32Buffer, writeCount*4 );
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utf8In += readCount;
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utf8Len -= readCount;
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}
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} // ToUTF32
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// =================================================================================================
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extern void ToUTF32Native ( const UTF8Unit * utf8In, size_t utf8Len, std::string * utf32Str )
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{
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enum { kBufferSize = 4*1024 };
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UTF32Unit u32Buffer[kBufferSize]; // 16K bytes
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size_t readCount, writeCount;
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utf32Str->erase();
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utf32Str->reserve ( 4*utf8Len ); // As good a guess as any.
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while ( utf8Len > 0 ) {
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UTF8_to_UTF32Nat ( utf8In, utf8Len, u32Buffer, kBufferSize, &readCount, &writeCount );
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if ( writeCount == 0 ) UC_Throw ( "Incomplete Unicode at end of string", kXMPErr_BadXML );
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utf32Str->append ( (const char *)u32Buffer, writeCount*4 );
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utf8In += readCount;
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utf8Len -= readCount;
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}
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} // ToUTF32Native
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// =================================================================================================
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extern void FromUTF16 ( const UTF16Unit * utf16In, size_t utf16Len, std::string * utf8Str, bool bigEndian )
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{
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UTF16_to_UTF8_Proc Converter = UTF16LE_to_UTF8;
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if ( bigEndian ) Converter = UTF16BE_to_UTF8;
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enum { kBufferSize = 16*1024 };
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UTF8Unit u8Buffer[kBufferSize];
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size_t readCount, writeCount;
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utf8Str->erase();
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utf8Str->reserve ( 2*utf16Len ); // As good a guess as any.
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while ( utf16Len > 0 ) {
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Converter ( utf16In, utf16Len, u8Buffer, kBufferSize, &readCount, &writeCount );
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if ( writeCount == 0 ) UC_Throw ( "Incomplete Unicode at end of string", kXMPErr_BadXML );
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utf8Str->append ( (const char *)u8Buffer, writeCount );
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utf16In += readCount;
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utf16Len -= readCount;
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}
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} // FromUTF16
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// =================================================================================================
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extern void FromUTF16Native ( const UTF16Unit * utf16In, size_t utf16Len, std::string * utf8Str )
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{
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enum { kBufferSize = 16*1024 };
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UTF8Unit u8Buffer[kBufferSize];
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size_t readCount, writeCount;
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utf8Str->erase();
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utf8Str->reserve ( 2*utf16Len ); // As good a guess as any.
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while ( utf16Len > 0 ) {
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UTF16Nat_to_UTF8 ( utf16In, utf16Len, u8Buffer, kBufferSize, &readCount, &writeCount );
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if ( writeCount == 0 ) UC_Throw ( "Incomplete Unicode at end of string", kXMPErr_BadXML );
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utf8Str->append ( (const char *)u8Buffer, writeCount );
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utf16In += readCount;
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utf16Len -= readCount;
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}
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} // FromUTF16Native
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// =================================================================================================
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extern void FromUTF32 ( const UTF32Unit * utf32In, size_t utf32Len, std::string * utf8Str, bool bigEndian )
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{
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UTF32_to_UTF8_Proc Converter = UTF32LE_to_UTF8;
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if ( bigEndian ) Converter = UTF32BE_to_UTF8;
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enum { kBufferSize = 16*1024 };
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UTF8Unit u8Buffer[kBufferSize];
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size_t readCount, writeCount;
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utf8Str->erase();
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utf8Str->reserve ( 2*utf32Len ); // As good a guess as any.
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while ( utf32Len > 0 ) {
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Converter ( utf32In, utf32Len, u8Buffer, kBufferSize, &readCount, &writeCount );
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if ( writeCount == 0 ) UC_Throw ( "Incomplete Unicode at end of string", kXMPErr_BadXML );
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utf8Str->append ( (const char *)u8Buffer, writeCount );
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utf32In += readCount;
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utf32Len -= readCount;
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}
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} // FromUTF32
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// =================================================================================================
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extern void FromUTF32Native ( const UTF32Unit * utf32In, size_t utf32Len, std::string * utf8Str )
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{
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enum { kBufferSize = 16*1024 };
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UTF8Unit u8Buffer[kBufferSize];
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size_t readCount, writeCount;
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utf8Str->erase();
|
|
utf8Str->reserve ( 2*utf32Len ); // As good a guess as any.
|
|
|
|
while ( utf32Len > 0 ) {
|
|
UTF32Nat_to_UTF8 ( utf32In, utf32Len, u8Buffer, kBufferSize, &readCount, &writeCount );
|
|
if ( writeCount == 0 ) UC_Throw ( "Incomplete Unicode at end of string", kXMPErr_BadXML );
|
|
utf8Str->append ( (const char *)u8Buffer, writeCount );
|
|
utf32In += readCount;
|
|
utf32Len -= readCount;
|
|
}
|
|
|
|
} // FromUTF32Native
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_to_UTF8_Multi ( const UTF32Unit cpIn, UTF8Unit * utf8Out, const size_t utf8Len, size_t * utf8Written )
|
|
{
|
|
size_t unitCount = 0;
|
|
|
|
if ( cpIn > 0x10FFFF ) UC_Throw ( "Bad UTF-32 - out of range", kXMPErr_BadParam );
|
|
if ( (0xD800 <= cpIn) && (cpIn <= 0xDFFF) ) UC_Throw ( "Bad UTF-32 - surrogate code point", kXMPErr_BadParam );
|
|
|
|
// Compute the number of bytes using 6 data bits each. Then see if the highest order bits will
|
|
// fit into the leading byte. Write the UTF-8 sequence if there is enough room.
|
|
|
|
UTF32Unit temp, mask;
|
|
size_t bytesNeeded = 0;
|
|
for ( temp = cpIn; temp != 0; temp = temp >> 6 ) ++bytesNeeded;
|
|
|
|
temp = cpIn >> ((bytesNeeded-1)*6); // The highest order data bits.
|
|
mask = (0x80 >> bytesNeeded) - 1; // Available data bits in the leading byte.
|
|
if ( temp > mask ) ++bytesNeeded;
|
|
|
|
if ( bytesNeeded > utf8Len ) goto Done; // Not enough room for the output.
|
|
unitCount = bytesNeeded;
|
|
|
|
temp = cpIn;
|
|
for ( --bytesNeeded; bytesNeeded > 0; --bytesNeeded ) {
|
|
utf8Out[bytesNeeded] = 0x80 | UTF8Unit ( temp & 0x3F );
|
|
temp = temp >> 6;
|
|
}
|
|
|
|
mask = ~((1 << (8-unitCount)) - 1);
|
|
utf8Out[0] = UTF8Unit ( mask | temp );
|
|
|
|
Done:
|
|
*utf8Written = unitCount;
|
|
return;
|
|
|
|
} // CodePoint_to_UTF8_Multi
|
|
|
|
// =================================================================================================
|
|
|
|
void CodePoint_to_UTF8 ( const UTF32Unit cpIn, UTF8Unit * utf8Out, const size_t utf8Len, size_t * utf8Written )
|
|
{
|
|
size_t unitCount = 0;
|
|
|
|
UC_Assert ( (utf8Out != 0) && (utf8Written != 0) );
|
|
if ( utf8Len == 0 ) goto Done;
|
|
if ( cpIn > 0x7F ) goto MultiByte; // ! Force linear execution path for ASCII.
|
|
|
|
unitCount = 1;
|
|
*utf8Out = UTF8Unit(cpIn);
|
|
|
|
Done:
|
|
*utf8Written = unitCount;
|
|
return;
|
|
|
|
MultiByte:
|
|
CodePoint_to_UTF8_Multi( cpIn, utf8Out, utf8Len, utf8Written );
|
|
return;
|
|
|
|
} // CodePoint_to_UTF8
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_from_UTF8_Multi ( const UTF8Unit * utf8In, const size_t utf8Len, UTF32Unit * cpOut, size_t * utf8Read )
|
|
{
|
|
UTF8Unit inUnit = *utf8In;
|
|
size_t unitCount = 0;
|
|
UTF32Unit cp; // ! Avoid gcc complaints about declarations after goto's.
|
|
const UTF8Unit * utf8Pos;
|
|
|
|
// -------------------------------------------------------------------------------------
|
|
// We've got a multibyte UTF-8 character. The first byte has the number of bytes and the
|
|
// highest order data bits. The other bytes each add 6 more data bits.
|
|
|
|
#if 0 // This might be a more effcient way to count the bytes.
|
|
static XMP_Uns8 kByteCounts[16] = { 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 2, 2, 3, 4 };
|
|
size_t bytesNeeded = kByteCounts [ inUnit >> 4 ];
|
|
if ( (bytesNeeded < 2) || ((bytesNeeded == 4) && ((inUnit & 0x08) != 0)) ) {
|
|
UC_Throw ( "Invalid UTF-8 sequence length", kXMPErr_BadParam );
|
|
}
|
|
#endif
|
|
|
|
size_t bytesNeeded = 0; // Count the leading 1 bits in the first byte.
|
|
for ( UTF8Unit temp = inUnit; temp > 0x7F; temp = temp << 1 ) ++bytesNeeded;
|
|
// *** Consider CPU-specific assembly inline, e.g. cntlzw on PowerPC.
|
|
|
|
if ( (bytesNeeded < 2) || (bytesNeeded > 4) ) UC_Throw ( "Invalid UTF-8 sequence length", kXMPErr_BadParam );
|
|
if ( bytesNeeded > utf8Len ) goto Done; // Not enough input in this buffer.
|
|
unitCount = bytesNeeded;
|
|
|
|
cp = inUnit & ((1 << (7-unitCount)) - 1); // Isolate the initial data bits in the bottom of cp.
|
|
|
|
utf8Pos = utf8In + 1; // We've absorbed the first byte.
|
|
for ( --bytesNeeded; bytesNeeded > 0; --bytesNeeded, ++utf8Pos ) {
|
|
inUnit = *utf8Pos;
|
|
if ( (inUnit & UTF8Unit(0xC0)) != UTF8Unit(0x80) ) UC_Throw ( "Invalid UTF-8 data byte", kXMPErr_BadParam );
|
|
cp = (cp << 6) | (inUnit & 0x3F);
|
|
}
|
|
|
|
if ( cp >= 0xD800 ) { // Skip the next comparisons most of the time.
|
|
if ( (0xD800 <= cp) && (cp <= 0xDFFF) ) UC_Throw ( "Bad UTF-8 - surrogate code point", kXMPErr_BadParam );
|
|
if ( cp > 0x10FFFF ) UC_Throw ( "Bad UTF-8 - out of range", kXMPErr_BadParam );
|
|
}
|
|
|
|
*cpOut = cp; // ! Don't put after Done, don't write if no input.
|
|
|
|
Done:
|
|
*utf8Read = unitCount;
|
|
return;
|
|
|
|
} // CodePoint_from_UTF8_Multi
|
|
|
|
// =================================================================================================
|
|
|
|
void CodePoint_from_UTF8 ( const UTF8Unit * utf8In, const size_t utf8Len, UTF32Unit * cpOut, size_t * utf8Read )
|
|
{
|
|
UTF8Unit inUnit; // ! Don't read until we know there is input.
|
|
size_t unitCount = 0;
|
|
|
|
UC_Assert ( (utf8In != 0) && (cpOut != 0) && (utf8Read != 0) );
|
|
if ( utf8Len == 0 ) goto Done;
|
|
inUnit = *utf8In;
|
|
if ( inUnit >= 0x80 ) goto MultiByte; // ! Force linear execution path for ASCII.
|
|
|
|
unitCount = 1;
|
|
*cpOut = inUnit; // ! Don't put after Done, don't write if no input.
|
|
|
|
Done:
|
|
*utf8Read = unitCount;
|
|
return;
|
|
|
|
MultiByte:
|
|
CodePoint_from_UTF8_Multi ( utf8In, utf8Len, cpOut, utf8Read );
|
|
return;
|
|
|
|
} // CodePoint_from_UTF8
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_to_UTF16Nat_Surrogate ( const UTF32Unit cpIn, UTF16Unit * utf16Out, const size_t utf16Len, size_t * utf16Written )
|
|
{
|
|
size_t unitCount = 0;
|
|
UTF32Unit temp; // ! Avoid gcc complaints about declarations after goto's.
|
|
|
|
if ( cpIn > 0x10FFFF ) UC_Throw ( "Bad UTF-32 - out of range", kXMPErr_BadParam );
|
|
if ( utf16Len < 2 ) goto Done; // Not enough room for the output.
|
|
|
|
unitCount = 2;
|
|
temp = cpIn - 0x10000;
|
|
utf16Out[0] = 0xD800 | UTF16Unit ( temp >> 10 );
|
|
utf16Out[1] = 0xDC00 | UTF16Unit ( temp & 0x3FF );
|
|
|
|
Done:
|
|
*utf16Written = unitCount;
|
|
return;
|
|
|
|
} // CodePoint_to_UTF16Nat_Surrogate
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_to_UTF16Nat ( const UTF32Unit cpIn, UTF16Unit * utf16Out, const size_t utf16Len, size_t * utf16Written )
|
|
{
|
|
size_t unitCount = 0;
|
|
|
|
UC_Assert ( (utf16Out != 0) && (utf16Written != 0) );
|
|
if ( utf16Len == 0 ) goto Done;
|
|
if ( cpIn >= 0xD800 ) goto CheckSurrogate; // ! Force linear execution path for the BMP.
|
|
|
|
InBMP:
|
|
unitCount = 1;
|
|
*utf16Out = UTF16Unit(cpIn);
|
|
|
|
Done:
|
|
*utf16Written = unitCount;
|
|
return;
|
|
|
|
CheckSurrogate:
|
|
if ( cpIn > 0xFFFF ) goto SurrogatePair;
|
|
if ( cpIn > 0xDFFF ) goto InBMP;
|
|
UC_Throw ( "Bad UTF-32 - surrogate code point", kXMPErr_BadParam );
|
|
|
|
SurrogatePair:
|
|
CodePoint_to_UTF16Nat_Surrogate ( cpIn, utf16Out, utf16Len, utf16Written );
|
|
return;
|
|
|
|
} // CodePoint_to_UTF16Nat
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_from_UTF16Nat_Surrogate ( const UTF16Unit * utf16In, const size_t utf16Len, UTF32Unit * cpOut, size_t * utf16Read )
|
|
{
|
|
UTF16Unit hiUnit = *utf16In;
|
|
size_t unitCount = 0;
|
|
UTF16Unit loUnit; // ! Avoid gcc complaints about declarations after goto's.
|
|
UTF32Unit cp;
|
|
|
|
// ----------------------------------
|
|
// We've got a UTF-16 surrogate pair.
|
|
|
|
if ( hiUnit > 0xDBFF ) UC_Throw ( "Bad UTF-16 - leading low surrogate", kXMPErr_BadParam );
|
|
if ( utf16Len < 2 ) goto Done; // Not enough input in this buffer.
|
|
|
|
loUnit = *(utf16In+1);
|
|
if ( (loUnit < 0xDC00) || (0xDFFF < loUnit) ) UC_Throw ( "Bad UTF-16 - missing low surrogate", kXMPErr_BadParam );
|
|
|
|
unitCount = 2;
|
|
cp = (((hiUnit & 0x3FF) << 10) | (loUnit & 0x3FF)) + 0x10000;
|
|
|
|
*cpOut = cp; // ! Don't put after Done, don't write if no input.
|
|
|
|
Done:
|
|
*utf16Read = unitCount;
|
|
return;
|
|
|
|
} // CodePoint_from_UTF16Nat_Surrogate
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_from_UTF16Nat ( const UTF16Unit * utf16In, const size_t utf16Len, UTF32Unit * cpOut, size_t * utf16Read )
|
|
{
|
|
UTF16Unit inUnit; // ! Don't read until we know there is input.
|
|
size_t unitCount = 0;
|
|
|
|
UC_Assert ( (utf16In != 0) && (cpOut != 0) && (utf16Read != 0) );
|
|
if ( utf16Len == 0 ) goto Done;
|
|
inUnit = *utf16In;
|
|
if ( (0xD800 <= inUnit) && (inUnit <= 0xDFFF) ) goto SurrogatePair; // ! Force linear execution path for the BMP.
|
|
|
|
unitCount = 1;
|
|
*cpOut = inUnit; // ! Don't put after Done, don't write if no input.
|
|
|
|
Done:
|
|
*utf16Read = unitCount;
|
|
return;
|
|
|
|
SurrogatePair:
|
|
CodePoint_from_UTF16Nat_Surrogate ( utf16In, utf16Len, cpOut, utf16Read );
|
|
return;
|
|
|
|
} // CodePoint_from_UTF16Nat
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF8_to_UTF16Nat ( const UTF8Unit * utf8In, const size_t utf8Len,
|
|
UTF16Unit * utf16Out, const size_t utf16Len,
|
|
size_t * utf8Read, size_t * utf16Written )
|
|
{
|
|
const UTF8Unit * utf8Pos = utf8In;
|
|
UTF16Unit * utf16Pos = utf16Out;
|
|
|
|
size_t utf8Left = utf8Len;
|
|
size_t utf16Left = utf16Len;
|
|
|
|
UC_Assert ( (utf8In != 0) && (utf16Out != 0) && (utf8Read != 0) && (utf16Written != 0) );
|
|
|
|
while ( (utf8Left > 0) && (utf16Left > 0) ) {
|
|
|
|
// Do a run of ASCII, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf8Left;
|
|
if ( limit > utf16Left ) limit = utf16Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF8Unit inUnit = *utf8Pos;
|
|
if ( inUnit > 0x7F ) break;
|
|
*utf16Pos = inUnit;
|
|
++utf8Pos;
|
|
++utf16Pos;
|
|
}
|
|
utf8Left -= i;
|
|
utf16Left -= i;
|
|
|
|
// Do a run of non-ASCII, it copies multiple input units into 1 or 2 output units.
|
|
while ( (utf8Left > 0) && (utf16Left > 0) ) {
|
|
UTF32Unit cp;
|
|
size_t len8, len16;
|
|
UTF8Unit inUnit = *utf8Pos;
|
|
if ( inUnit <= 0x7F ) break;
|
|
CodePoint_from_UTF8_Multi ( utf8Pos, utf8Left, &cp, &len8 );
|
|
if ( len8 == 0 ) goto Done; // The input buffer ends in the middle of a character.
|
|
if ( cp <= 0xFFFF ) {
|
|
*utf16Pos = UTF16Unit(cp);
|
|
len16 = 1;
|
|
} else {
|
|
CodePoint_to_UTF16Nat_Surrogate ( cp, utf16Pos, utf16Left, &len16 );
|
|
if ( len16 == 0 ) goto Done; // Not enough room in the output buffer.
|
|
}
|
|
utf8Left -= len8;
|
|
utf8Pos += len8;
|
|
utf16Left -= len16;
|
|
utf16Pos += len16;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf8Read = utf8Len - utf8Left;
|
|
*utf16Written = utf16Len - utf16Left;
|
|
|
|
} // UTF8_to_UTF16Nat
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF8_to_UTF32Nat ( const UTF8Unit * utf8In, const size_t utf8Len,
|
|
UTF32Unit * utf32Out, const size_t utf32Len,
|
|
size_t * utf8Read, size_t * utf32Written )
|
|
{
|
|
const UTF8Unit * utf8Pos = utf8In;
|
|
UTF32Unit * utf32Pos = utf32Out;
|
|
|
|
size_t utf8Left = utf8Len;
|
|
size_t utf32Left = utf32Len;
|
|
|
|
UC_Assert ( (utf8In != 0) && (utf32Out != 0) && (utf8Read != 0) && (utf32Written != 0) );
|
|
|
|
while ( (utf8Left > 0) && (utf32Left > 0) ) {
|
|
|
|
// Do a run of ASCII, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf8Left;
|
|
if ( limit > utf32Left ) limit = utf32Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF8Unit inUnit = *utf8Pos;
|
|
if ( inUnit > 0x7F ) break;
|
|
*utf32Pos = inUnit;
|
|
++utf8Pos;
|
|
++utf32Pos;
|
|
}
|
|
utf8Left -= i;
|
|
utf32Left -= i;
|
|
|
|
// Do a run of non-ASCII, it copies variable input into 1 output unit.
|
|
while ( (utf8Left > 0) && (utf32Left > 0) ) {
|
|
size_t len;
|
|
UTF8Unit inUnit = *utf8Pos;
|
|
if ( inUnit <= 0x7F ) break;
|
|
CodePoint_from_UTF8_Multi ( utf8Pos, utf8Left, utf32Pos, &len );
|
|
if ( len == 0 ) goto Done; // The input buffer ends in the middle of a character.
|
|
utf8Left -= len;
|
|
utf8Pos += len;
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf8Read = utf8Len - utf8Left;
|
|
*utf32Written = utf32Len - utf32Left;
|
|
|
|
} // UTF8_to_UTF32Nat
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF16Nat_to_UTF8 ( const UTF16Unit * utf16In, const size_t utf16Len,
|
|
UTF8Unit * utf8Out, const size_t utf8Len,
|
|
size_t * utf16Read, size_t * utf8Written )
|
|
{
|
|
const UTF16Unit * utf16Pos = utf16In;
|
|
UTF8Unit * utf8Pos = utf8Out;
|
|
|
|
size_t utf16Left = utf16Len;
|
|
size_t utf8Left = utf8Len;
|
|
|
|
UC_Assert ( (utf16In != 0) && (utf8Out != 0) && (utf16Read != 0) && (utf8Written != 0) );
|
|
|
|
while ( (utf16Left > 0) && (utf8Left > 0) ) {
|
|
|
|
// Do a run of ASCII, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf16Left;
|
|
if ( limit > utf8Left ) limit = utf8Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF16Unit inUnit = *utf16Pos;
|
|
if ( inUnit > 0x7F ) break;
|
|
*utf8Pos = UTF8Unit(inUnit);
|
|
++utf16Pos;
|
|
++utf8Pos;
|
|
}
|
|
utf16Left -= i;
|
|
utf8Left -= i;
|
|
|
|
// Do a run of non-ASCII inside the BMP, it copies 1 input unit into multiple output units.
|
|
while ( (utf16Left > 0) && (utf8Left > 0) ) {
|
|
size_t len8;
|
|
UTF16Unit inUnit = *utf16Pos;
|
|
if ( inUnit <= 0x7F ) break;
|
|
if ( (0xD800 <= inUnit) && (inUnit <= 0xDFFF) ) break;
|
|
CodePoint_to_UTF8_Multi ( inUnit, utf8Pos, utf8Left, &len8 );
|
|
if ( len8 == 0 ) goto Done; // Not enough room in the output buffer.
|
|
utf16Left -= 1;
|
|
utf16Pos += 1;
|
|
utf8Left -= len8;
|
|
utf8Pos += len8;
|
|
}
|
|
|
|
// Do a run of surrogate pairs, it copies 2 input units into multiple output units.
|
|
while ( (utf16Left > 0) && (utf8Left > 0) ) {
|
|
UTF32Unit cp;
|
|
size_t len16, len8;
|
|
UTF16Unit inUnit = *utf16Pos;
|
|
if ( (inUnit < 0xD800) || (0xDFFF < inUnit) ) break;
|
|
CodePoint_from_UTF16Nat_Surrogate ( utf16Pos, utf16Left, &cp, &len16 );
|
|
if ( len16 == 0 ) goto Done; // The input buffer ends in the middle of a surrogate pair.
|
|
UC_Assert ( len16 == 2 );
|
|
CodePoint_to_UTF8_Multi ( cp, utf8Pos, utf8Left, &len8 );
|
|
if ( len8 == 0 ) goto Done; // Not enough room in the output buffer.
|
|
utf16Left -= len16;
|
|
utf16Pos += len16;
|
|
utf8Left -= len8;
|
|
utf8Pos += len8;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf16Read = utf16Len - utf16Left;
|
|
*utf8Written = utf8Len - utf8Left;
|
|
|
|
} // UTF16Nat_to_UTF8
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF32Nat_to_UTF8 ( const UTF32Unit * utf32In, const size_t utf32Len,
|
|
UTF8Unit * utf8Out, const size_t utf8Len,
|
|
size_t * utf32Read, size_t * utf8Written )
|
|
{
|
|
const UTF32Unit * utf32Pos = utf32In;
|
|
UTF8Unit * utf8Pos = utf8Out;
|
|
|
|
size_t utf32Left = utf32Len;
|
|
size_t utf8Left = utf8Len;
|
|
|
|
UC_Assert ( (utf32In != 0) && (utf8Out != 0) && (utf32Read != 0) && (utf8Written != 0) );
|
|
|
|
while ( (utf32Left > 0) && (utf8Left > 0) ) {
|
|
|
|
// Do a run of ASCII, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf32Left;
|
|
if ( limit > utf8Left ) limit = utf8Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF32Unit inUnit = *utf32Pos;
|
|
if ( inUnit > 0x7F ) break;
|
|
*utf8Pos = UTF8Unit(inUnit);
|
|
++utf32Pos;
|
|
++utf8Pos;
|
|
}
|
|
utf32Left -= i;
|
|
utf8Left -= i;
|
|
|
|
// Do a run of non-ASCII, it copies 1 input unit into multiple output units.
|
|
while ( (utf32Left > 0) && (utf8Left > 0) ) {
|
|
size_t len;
|
|
UTF32Unit inUnit = *utf32Pos;
|
|
if ( inUnit <= 0x7F ) break;
|
|
CodePoint_to_UTF8_Multi ( inUnit, utf8Pos, utf8Left, &len );
|
|
if ( len == 0 ) goto Done; // Not enough room in the output buffer.
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
utf8Left -= len;
|
|
utf8Pos += len;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf32Read = utf32Len - utf32Left;
|
|
*utf8Written = utf8Len - utf8Left;
|
|
|
|
} // UTF32Nat_to_UTF8
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF16Nat_to_UTF32Nat ( const UTF16Unit * utf16In, const size_t utf16Len,
|
|
UTF32Unit * utf32Out, const size_t utf32Len,
|
|
size_t * utf16Read, size_t * utf32Written )
|
|
{
|
|
const UTF16Unit * utf16Pos = utf16In;
|
|
UTF32Unit * utf32Pos = utf32Out;
|
|
|
|
size_t utf16Left = utf16Len;
|
|
size_t utf32Left = utf32Len;
|
|
|
|
UC_Assert ( (utf16In != 0) && (utf32Out != 0) && (utf16Read != 0) && (utf32Written != 0) );
|
|
|
|
while ( (utf16Left > 0) && (utf32Left > 0) ) {
|
|
|
|
// Do a run of BMP, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf16Left;
|
|
if ( limit > utf32Left ) limit = utf32Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF16Unit inUnit = *utf16Pos;
|
|
if ( (0xD800 <= inUnit) && (inUnit <= 0xDFFF) ) break;
|
|
*utf32Pos = inUnit;
|
|
++utf16Pos;
|
|
++utf32Pos;
|
|
}
|
|
utf16Left -= i;
|
|
utf32Left -= i;
|
|
|
|
// Do a run of surrogate pairs, it copies 2 input units into 1 output unit.
|
|
while ( (utf16Left > 0) && (utf32Left > 0) ) {
|
|
size_t len;
|
|
UTF16Unit inUnit = *utf16Pos;
|
|
if ( (inUnit < 0xD800) || (0xDFFF < inUnit) ) break;
|
|
CodePoint_from_UTF16Nat_Surrogate ( utf16Pos, utf16Left, utf32Pos, &len );
|
|
if ( len == 0 ) goto Done; // The input buffer ends in the middle of a surrogate pair.
|
|
UC_Assert ( len == 2 );
|
|
utf16Left -= len;
|
|
utf16Pos += len;
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf16Read = utf16Len - utf16Left;
|
|
*utf32Written = utf32Len - utf32Left;
|
|
|
|
} // UTF16Nat_to_UTF32Nat
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF32Nat_to_UTF16Nat ( const UTF32Unit * utf32In, const size_t utf32Len,
|
|
UTF16Unit * utf16Out, const size_t utf16Len,
|
|
size_t * utf32Read, size_t * utf16Written )
|
|
{
|
|
const UTF32Unit * utf32Pos = utf32In;
|
|
UTF16Unit * utf16Pos = utf16Out;
|
|
|
|
size_t utf32Left = utf32Len;
|
|
size_t utf16Left = utf16Len;
|
|
|
|
UC_Assert ( (utf32In != 0) && (utf16Out != 0) && (utf32Read != 0) && (utf16Written != 0) );
|
|
|
|
while ( (utf32Left > 0) && (utf16Left > 0) ) {
|
|
|
|
// Do a run of BMP, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf32Left;
|
|
if ( limit > utf16Left ) limit = utf16Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF32Unit inUnit = *utf32Pos;
|
|
if ( inUnit > 0xFFFF ) break;
|
|
*utf16Pos = UTF16Unit(inUnit);
|
|
++utf32Pos;
|
|
++utf16Pos;
|
|
}
|
|
utf32Left -= i;
|
|
utf16Left -= i;
|
|
|
|
// Do a run of non-BMP, it copies 1 input unit into 2 output units.
|
|
while ( (utf32Left > 0) && (utf16Left > 0) ) {
|
|
size_t len;
|
|
UTF32Unit inUnit = *utf32Pos;
|
|
if ( inUnit <= 0xFFFF ) break;
|
|
CodePoint_to_UTF16Nat_Surrogate ( inUnit, utf16Pos, utf16Left, &len );
|
|
if ( len == 0 ) goto Done; // Not enough room in the output buffer.
|
|
UC_Assert ( len == 2 );
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
utf16Left -= 2;
|
|
utf16Pos += 2;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf32Read = utf32Len - utf32Left;
|
|
*utf16Written = utf16Len - utf16Left;
|
|
|
|
} // UTF32Nat_to_UTF16Nat
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_to_UTF16Swp_Surrogate ( const UTF32Unit cpIn, UTF16Unit * utf16Out, const size_t utf16Len, size_t * utf16Written )
|
|
{
|
|
size_t unitCount = 0;
|
|
UTF32Unit temp; // ! Avoid gcc complaints about declarations after goto's.
|
|
|
|
if ( cpIn > 0x10FFFF ) UC_Throw ( "Bad UTF-32 - out of range", kXMPErr_BadParam );
|
|
if ( utf16Len < 2 ) goto Done; // Not enough room for the output.
|
|
|
|
unitCount = 2;
|
|
temp = cpIn - 0x10000;
|
|
UTF16OutSwap ( &utf16Out[0], (0xD800 | UTF16Unit ( temp >> 10 )) );
|
|
UTF16OutSwap ( &utf16Out[1], (0xDC00 | UTF16Unit ( temp & 0x3FF)) );
|
|
|
|
Done:
|
|
*utf16Written = unitCount;
|
|
return;
|
|
|
|
} // CodePoint_to_UTF16Swp_Surrogate
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_to_UTF16Swp ( const UTF32Unit cpIn, UTF16Unit * utf16Out, const size_t utf16Len, size_t * utf16Written )
|
|
{
|
|
size_t unitCount = 0;
|
|
|
|
UC_Assert ( (utf16Out != 0) && (utf16Written != 0) );
|
|
if ( utf16Len == 0 ) goto Done;
|
|
if ( cpIn >= 0xD800 ) goto CheckSurrogate; // ! Force linear execution path for the BMP.
|
|
|
|
InBMP:
|
|
unitCount = 1;
|
|
UTF16OutSwap ( utf16Out, UTF16Unit(cpIn) );
|
|
|
|
Done:
|
|
*utf16Written = unitCount;
|
|
return;
|
|
|
|
CheckSurrogate:
|
|
if ( cpIn > 0xFFFF ) goto SurrogatePair;
|
|
if ( cpIn > 0xDFFF ) goto InBMP;
|
|
UC_Throw ( "Bad UTF-32 - surrogate code point", kXMPErr_BadParam );
|
|
|
|
SurrogatePair:
|
|
CodePoint_to_UTF16Swp_Surrogate ( cpIn, utf16Out, utf16Len, utf16Written );
|
|
return;
|
|
|
|
} // CodePoint_to_UTF16Swp
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_from_UTF16Swp_Surrogate ( const UTF16Unit * utf16In, const size_t utf16Len, UTF32Unit * cpOut, size_t * utf16Read )
|
|
{
|
|
UTF16Unit hiUnit = UTF16InSwap(utf16In);
|
|
size_t unitCount = 0;
|
|
UTF16Unit loUnit; // ! Avoid gcc complaints about declarations after goto's.
|
|
UTF32Unit cp;
|
|
|
|
// ----------------------------------
|
|
// We've got a UTF-16 surrogate pair.
|
|
|
|
if ( hiUnit > 0xDBFF ) UC_Throw ( "Bad UTF-16 - leading low surrogate", kXMPErr_BadParam );
|
|
if ( utf16Len < 2 ) goto Done; // Not enough input in this buffer.
|
|
|
|
loUnit = UTF16InSwap(utf16In+1);
|
|
if ( (loUnit < 0xDC00) || (0xDFFF < loUnit) ) UC_Throw ( "Bad UTF-16 - missing low surrogate", kXMPErr_BadParam );
|
|
|
|
unitCount = 2;
|
|
cp = (((hiUnit & 0x3FF) << 10) | (loUnit & 0x3FF)) + 0x10000;
|
|
|
|
*cpOut = cp; // ! Don't put after Done, don't write if no input.
|
|
|
|
Done:
|
|
*utf16Read = unitCount;
|
|
return;
|
|
|
|
} // CodePoint_from_UTF16Swp_Surrogate
|
|
|
|
// =================================================================================================
|
|
|
|
static void CodePoint_from_UTF16Swp ( const UTF16Unit * utf16In, const size_t utf16Len, UTF32Unit * cpOut, size_t * utf16Read )
|
|
{
|
|
UTF16Unit inUnit; // ! Don't read until we know there is input.
|
|
size_t unitCount = 0;
|
|
|
|
UC_Assert ( (utf16In != 0) && (cpOut != 0) && (utf16Read != 0) );
|
|
if ( utf16Len == 0 ) goto Done;
|
|
inUnit = UTF16InSwap(utf16In);
|
|
if ( (0xD800 <= inUnit) && (inUnit <= 0xDFFF) ) goto SurrogatePair; // ! Force linear execution path for the BMP.
|
|
|
|
unitCount = 1;
|
|
*cpOut = inUnit; // ! Don't put after Done, don't write if no input.
|
|
|
|
Done:
|
|
*utf16Read = unitCount;
|
|
return;
|
|
|
|
SurrogatePair:
|
|
CodePoint_from_UTF16Swp_Surrogate ( utf16In, utf16Len, cpOut, utf16Read );
|
|
return;
|
|
|
|
} // CodePoint_from_UTF16Swp
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF8_to_UTF16Swp ( const UTF8Unit * utf8In, const size_t utf8Len,
|
|
UTF16Unit * utf16Out, const size_t utf16Len,
|
|
size_t * utf8Read, size_t * utf16Written )
|
|
{
|
|
const UTF8Unit * utf8Pos = utf8In;
|
|
UTF16Unit * utf16Pos = utf16Out;
|
|
|
|
size_t utf8Left = utf8Len;
|
|
size_t utf16Left = utf16Len;
|
|
|
|
UC_Assert ( (utf8In != 0) && (utf16Out != 0) && (utf8Read != 0) && (utf16Written != 0) );
|
|
|
|
while ( (utf8Left > 0) && (utf16Left > 0) ) {
|
|
|
|
// Do a run of ASCII, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf8Left;
|
|
if ( limit > utf16Left ) limit = utf16Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF8Unit inUnit = *utf8Pos;
|
|
if ( inUnit > 0x7F ) break;
|
|
*utf16Pos = UTF16Unit(inUnit) << 8; // Better than: UTF16OutSwap ( utf16Pos, inUnit );
|
|
++utf8Pos;
|
|
++utf16Pos;
|
|
}
|
|
utf8Left -= i;
|
|
utf16Left -= i;
|
|
|
|
// Do a run of non-ASCII, it copies multiple input units into 1 or 2 output units.
|
|
while ( (utf8Left > 0) && (utf16Left > 0) ) {
|
|
UTF32Unit cp;
|
|
size_t len8, len16;
|
|
UTF8Unit inUnit = *utf8Pos;
|
|
if ( inUnit <= 0x7F ) break;
|
|
CodePoint_from_UTF8_Multi ( utf8Pos, utf8Left, &cp, &len8 );
|
|
if ( len8 == 0 ) goto Done; // The input buffer ends in the middle of a character.
|
|
if ( cp <= 0xFFFF ) {
|
|
UTF16OutSwap ( utf16Pos, UTF16Unit(cp) );
|
|
len16 = 1;
|
|
} else {
|
|
CodePoint_to_UTF16Swp_Surrogate ( cp, utf16Pos, utf16Left, &len16 );
|
|
if ( len16 == 0 ) goto Done; // Not enough room in the output buffer.
|
|
}
|
|
utf8Left -= len8;
|
|
utf8Pos += len8;
|
|
utf16Left -= len16;
|
|
utf16Pos += len16;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf8Read = utf8Len - utf8Left;
|
|
*utf16Written = utf16Len - utf16Left;
|
|
|
|
} // UTF8_to_UTF16Swp
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF8_to_UTF32Swp ( const UTF8Unit * utf8In, const size_t utf8Len,
|
|
UTF32Unit * utf32Out, const size_t utf32Len,
|
|
size_t * utf8Read, size_t * utf32Written )
|
|
{
|
|
const UTF8Unit * utf8Pos = utf8In;
|
|
UTF32Unit * utf32Pos = utf32Out;
|
|
|
|
size_t utf8Left = utf8Len;
|
|
size_t utf32Left = utf32Len;
|
|
|
|
UC_Assert ( (utf8In != 0) && (utf32Out != 0) && (utf8Read != 0) && (utf32Written != 0) );
|
|
|
|
while ( (utf8Left > 0) && (utf32Left > 0) ) {
|
|
|
|
// Do a run of ASCII, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf8Left;
|
|
if ( limit > utf32Left ) limit = utf32Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF8Unit inUnit = *utf8Pos;
|
|
if ( inUnit > 0x7F ) break;
|
|
*utf32Pos = UTF32Unit(inUnit) << 24; // Better than: UTF32OutSwap ( utf32Pos, inUnit );
|
|
++utf8Pos;
|
|
++utf32Pos;
|
|
}
|
|
utf8Left -= i;
|
|
utf32Left -= i;
|
|
|
|
// Do a run of non-ASCII, it copies variable input into 1 output unit.
|
|
while ( (utf8Left > 0) && (utf32Left > 0) ) {
|
|
size_t len;
|
|
UTF32Unit cp;
|
|
UTF8Unit inUnit = *utf8Pos;
|
|
if ( inUnit <= 0x7F ) break;
|
|
CodePoint_from_UTF8_Multi ( utf8Pos, utf8Left, &cp, &len );
|
|
if ( len == 0 ) goto Done; // The input buffer ends in the middle of a character.
|
|
UTF32OutSwap ( utf32Pos, cp );
|
|
utf8Left -= len;
|
|
utf8Pos += len;
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf8Read = utf8Len - utf8Left;
|
|
*utf32Written = utf32Len - utf32Left;
|
|
|
|
} // UTF8_to_UTF32Swp
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF16Swp_to_UTF8 ( const UTF16Unit * utf16In, const size_t utf16Len,
|
|
UTF8Unit * utf8Out, const size_t utf8Len,
|
|
size_t * utf16Read, size_t * utf8Written )
|
|
{
|
|
const UTF16Unit * utf16Pos = utf16In;
|
|
UTF8Unit * utf8Pos = utf8Out;
|
|
|
|
size_t utf16Left = utf16Len;
|
|
size_t utf8Left = utf8Len;
|
|
|
|
UC_Assert ( (utf16In != 0) && (utf8Out != 0) && (utf16Read != 0) && (utf8Written != 0) );
|
|
|
|
while ( (utf16Left > 0) && (utf8Left > 0) ) {
|
|
|
|
// Do a run of ASCII, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf16Left;
|
|
if ( limit > utf8Left ) limit = utf8Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF16Unit inUnit = UTF16InSwap(utf16Pos);
|
|
if ( inUnit > 0x7F ) break;
|
|
*utf8Pos = UTF8Unit(inUnit);
|
|
++utf16Pos;
|
|
++utf8Pos;
|
|
}
|
|
utf16Left -= i;
|
|
utf8Left -= i;
|
|
|
|
// Do a run of non-ASCII inside the BMP, it copies 1 input unit into multiple output units.
|
|
while ( (utf16Left > 0) && (utf8Left > 0) ) {
|
|
size_t len8;
|
|
UTF16Unit inUnit = UTF16InSwap(utf16Pos);
|
|
if ( inUnit <= 0x7F ) break;
|
|
if ( (0xD800 <= inUnit) && (inUnit <= 0xDFFF) ) break;
|
|
CodePoint_to_UTF8_Multi ( inUnit, utf8Pos, utf8Left, &len8 );
|
|
if ( len8 == 0 ) goto Done; // Not enough room in the output buffer.
|
|
utf16Left -= 1;
|
|
utf16Pos += 1;
|
|
utf8Left -= len8;
|
|
utf8Pos += len8;
|
|
}
|
|
|
|
// Do a run of surrogate pairs, it copies 2 input units into multiple output units.
|
|
while ( (utf16Left > 0) && (utf8Left > 0) ) {
|
|
UTF32Unit cp;
|
|
size_t len16, len8;
|
|
UTF16Unit inUnit = UTF16InSwap(utf16Pos);
|
|
if ( (inUnit < 0xD800) || (0xDFFF < inUnit) ) break;
|
|
CodePoint_from_UTF16Swp_Surrogate ( utf16Pos, utf16Left, &cp, &len16 );
|
|
if ( len16 == 0 ) goto Done; // The input buffer ends in the middle of a surrogate pair.
|
|
UC_Assert ( len16 == 2 );
|
|
CodePoint_to_UTF8_Multi ( cp, utf8Pos, utf8Left, &len8 );
|
|
if ( len8 == 0 ) goto Done; // Not enough room in the output buffer.
|
|
utf16Left -= len16;
|
|
utf16Pos += len16;
|
|
utf8Left -= len8;
|
|
utf8Pos += len8;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf16Read = utf16Len - utf16Left;
|
|
*utf8Written = utf8Len - utf8Left;
|
|
|
|
} // UTF16Swp_to_UTF8
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF32Swp_to_UTF8 ( const UTF32Unit * utf32In, const size_t utf32Len,
|
|
UTF8Unit * utf8Out, const size_t utf8Len,
|
|
size_t * utf32Read, size_t * utf8Written )
|
|
{
|
|
const UTF32Unit * utf32Pos = utf32In;
|
|
UTF8Unit * utf8Pos = utf8Out;
|
|
|
|
size_t utf32Left = utf32Len;
|
|
size_t utf8Left = utf8Len;
|
|
|
|
UC_Assert ( (utf32In != 0) && (utf8Out != 0) && (utf32Read != 0) && (utf8Written != 0) );
|
|
|
|
while ( (utf32Left > 0) && (utf8Left > 0) ) {
|
|
|
|
// Do a run of ASCII, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf32Left;
|
|
if ( limit > utf8Left ) limit = utf8Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF32Unit cp = UTF32InSwap(utf32Pos);
|
|
if ( cp > 0x7F ) break;
|
|
*utf8Pos = UTF8Unit(cp);
|
|
++utf32Pos;
|
|
++utf8Pos;
|
|
}
|
|
utf32Left -= i;
|
|
utf8Left -= i;
|
|
|
|
// Do a run of non-ASCII, it copies 1 input unit into multiple output units.
|
|
while ( (utf32Left > 0) && (utf8Left > 0) ) {
|
|
size_t len;
|
|
UTF32Unit cp = UTF32InSwap(utf32Pos);
|
|
if ( cp <= 0x7F ) break;
|
|
CodePoint_to_UTF8_Multi ( cp, utf8Pos, utf8Left, &len );
|
|
if ( len == 0 ) goto Done; // Not enough room in the output buffer.
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
utf8Left -= len;
|
|
utf8Pos += len;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf32Read = utf32Len - utf32Left;
|
|
*utf8Written = utf8Len - utf8Left;
|
|
|
|
} // UTF32Swp_to_UTF8
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF16Swp_to_UTF32Swp ( const UTF16Unit * utf16In, const size_t utf16Len,
|
|
UTF32Unit * utf32Out, const size_t utf32Len,
|
|
size_t * utf16Read, size_t * utf32Written )
|
|
{
|
|
const UTF16Unit * utf16Pos = utf16In;
|
|
UTF32Unit * utf32Pos = utf32Out;
|
|
|
|
size_t utf16Left = utf16Len;
|
|
size_t utf32Left = utf32Len;
|
|
|
|
UC_Assert ( (utf16In != 0) && (utf32Out != 0) && (utf16Read != 0) && (utf32Written != 0) );
|
|
|
|
while ( (utf16Left > 0) && (utf32Left > 0) ) {
|
|
|
|
// Do a run of BMP, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf16Left;
|
|
if ( limit > utf32Left ) limit = utf32Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF16Unit inUnit = UTF16InSwap(utf16Pos);
|
|
if ( (0xD800 <= inUnit) && (inUnit <= 0xDFFF) ) break;
|
|
*utf32Pos = UTF32Unit(*utf16Pos) << 16; // Better than: UTF32OutSwap ( utf32Pos, inUnit );
|
|
++utf16Pos;
|
|
++utf32Pos;
|
|
}
|
|
utf16Left -= i;
|
|
utf32Left -= i;
|
|
|
|
// Do a run of surrogate pairs, it copies 2 input units into 1 output unit.
|
|
while ( (utf16Left > 0) && (utf32Left > 0) ) {
|
|
size_t len;
|
|
UTF32Unit cp;
|
|
UTF16Unit inUnit = UTF16InSwap(utf16Pos);
|
|
if ( (inUnit < 0xD800) || (0xDFFF < inUnit) ) break;
|
|
CodePoint_from_UTF16Swp_Surrogate ( utf16Pos, utf16Left, &cp, &len );
|
|
if ( len == 0 ) goto Done; // The input buffer ends in the middle of a surrogate pair.
|
|
UTF32OutSwap ( utf32Pos, cp );
|
|
UC_Assert ( len == 2 );
|
|
utf16Left -= len;
|
|
utf16Pos += len;
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf16Read = utf16Len - utf16Left;
|
|
*utf32Written = utf32Len - utf32Left;
|
|
|
|
} // UTF16Swp_to_UTF32Swp
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF32Swp_to_UTF16Swp ( const UTF32Unit * utf32In, const size_t utf32Len,
|
|
UTF16Unit * utf16Out, const size_t utf16Len,
|
|
size_t * utf32Read, size_t * utf16Written )
|
|
{
|
|
const UTF32Unit * utf32Pos = utf32In;
|
|
UTF16Unit * utf16Pos = utf16Out;
|
|
|
|
size_t utf32Left = utf32Len;
|
|
size_t utf16Left = utf16Len;
|
|
|
|
const size_t k32to16Offset = swap32to16Offset; // ! Make sure compiler treats as an invariant.
|
|
|
|
UC_Assert ( (utf32In != 0) && (utf16Out != 0) && (utf32Read != 0) && (utf16Written != 0) );
|
|
|
|
while ( (utf32Left > 0) && (utf16Left > 0) ) {
|
|
|
|
// Do a run of BMP, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf32Left;
|
|
if ( limit > utf16Left ) limit = utf16Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF32Unit inUnit = UTF32InSwap(utf32Pos);
|
|
if ( inUnit > 0xFFFF ) break;
|
|
*utf16Pos = *(((UTF16Unit*)utf32Pos) + k32to16Offset); // Better than: UTF16OutSwap ( utf16Pos, UTF16Unit(inUnit) );
|
|
++utf32Pos;
|
|
++utf16Pos;
|
|
}
|
|
utf32Left -= i;
|
|
utf16Left -= i;
|
|
|
|
// Do a run of non-BMP, it copies 1 input unit into 2 output units.
|
|
while ( (utf32Left > 0) && (utf16Left > 0) ) {
|
|
size_t len;
|
|
UTF32Unit inUnit = UTF32InSwap(utf32Pos);
|
|
if ( inUnit <= 0xFFFF ) break;
|
|
CodePoint_to_UTF16Swp_Surrogate ( inUnit, utf16Pos, utf16Left, &len );
|
|
if ( len == 0 ) goto Done; // Not enough room in the output buffer.
|
|
UC_Assert ( len == 2 );
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
utf16Left -= 2;
|
|
utf16Pos += 2;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf32Read = utf32Len - utf32Left;
|
|
*utf16Written = utf16Len - utf16Left;
|
|
|
|
} // UTF32Swp_to_UTF16Swp
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF16Nat_to_UTF32Swp ( const UTF16Unit * utf16In, const size_t utf16Len,
|
|
UTF32Unit * utf32Out, const size_t utf32Len,
|
|
size_t * utf16Read, size_t * utf32Written )
|
|
{
|
|
const UTF16Unit * utf16Pos = utf16In;
|
|
UTF32Unit * utf32Pos = utf32Out;
|
|
|
|
size_t utf16Left = utf16Len;
|
|
size_t utf32Left = utf32Len;
|
|
|
|
UC_Assert ( (utf16In != 0) && (utf32Out != 0) && (utf16Read != 0) && (utf32Written != 0) );
|
|
|
|
while ( (utf16Left > 0) && (utf32Left > 0) ) {
|
|
|
|
// Do a run of BMP, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf16Left;
|
|
if ( limit > utf32Left ) limit = utf32Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF16Unit inUnit = *utf16Pos;
|
|
if ( (0xD800 <= inUnit) && (inUnit <= 0xDFFF) ) break;
|
|
UTF32OutSwap ( utf32Pos, inUnit );
|
|
++utf16Pos;
|
|
++utf32Pos;
|
|
}
|
|
utf16Left -= i;
|
|
utf32Left -= i;
|
|
|
|
// Do a run of surrogate pairs, it copies 2 input units into 1 output unit.
|
|
while ( (utf16Left > 0) && (utf32Left > 0) ) {
|
|
size_t len;
|
|
UTF32Unit cp;
|
|
UTF16Unit inUnit = *utf16Pos;
|
|
if ( (inUnit < 0xD800) || (0xDFFF < inUnit) ) break;
|
|
CodePoint_from_UTF16Nat_Surrogate ( utf16Pos, utf16Left, &cp, &len );
|
|
if ( len == 0 ) goto Done; // The input buffer ends in the middle of a surrogate pair.
|
|
UC_Assert ( len == 2 );
|
|
UTF32OutSwap ( utf32Pos, cp );
|
|
utf16Left -= len;
|
|
utf16Pos += len;
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf16Read = utf16Len - utf16Left;
|
|
*utf32Written = utf32Len - utf32Left;
|
|
|
|
} // UTF16Nat_to_UTF32Swp
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF16Swp_to_UTF32Nat ( const UTF16Unit * utf16In, const size_t utf16Len,
|
|
UTF32Unit * utf32Out, const size_t utf32Len,
|
|
size_t * utf16Read, size_t * utf32Written )
|
|
{
|
|
const UTF16Unit * utf16Pos = utf16In;
|
|
UTF32Unit * utf32Pos = utf32Out;
|
|
|
|
size_t utf16Left = utf16Len;
|
|
size_t utf32Left = utf32Len;
|
|
|
|
UC_Assert ( (utf16In != 0) && (utf32Out != 0) && (utf16Read != 0) && (utf32Written != 0) );
|
|
|
|
while ( (utf16Left > 0) && (utf32Left > 0) ) {
|
|
|
|
// Do a run of BMP, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf16Left;
|
|
if ( limit > utf32Left ) limit = utf32Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF16Unit inUnit = UTF16InSwap(utf16Pos);
|
|
if ( (0xD800 <= inUnit) && (inUnit <= 0xDFFF) ) break;
|
|
*utf32Pos = inUnit;
|
|
++utf16Pos;
|
|
++utf32Pos;
|
|
}
|
|
utf16Left -= i;
|
|
utf32Left -= i;
|
|
|
|
// Do a run of surrogate pairs, it copies 2 input units into 1 output unit.
|
|
while ( (utf16Left > 0) && (utf32Left > 0) ) {
|
|
size_t len;
|
|
UTF16Unit inUnit = UTF16InSwap(utf16Pos);
|
|
if ( (inUnit < 0xD800) || (0xDFFF < inUnit) ) break;
|
|
CodePoint_from_UTF16Swp_Surrogate ( utf16Pos, utf16Left, utf32Pos, &len );
|
|
if ( len == 0 ) goto Done; // The input buffer ends in the middle of a surrogate pair.
|
|
UC_Assert ( len == 2 );
|
|
utf16Left -= len;
|
|
utf16Pos += len;
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf16Read = utf16Len - utf16Left;
|
|
*utf32Written = utf32Len - utf32Left;
|
|
|
|
} // UTF16Swp_to_UTF32Nat
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF32Nat_to_UTF16Swp ( const UTF32Unit * utf32In, const size_t utf32Len,
|
|
UTF16Unit * utf16Out, const size_t utf16Len,
|
|
size_t * utf32Read, size_t * utf16Written )
|
|
{
|
|
const UTF32Unit * utf32Pos = utf32In;
|
|
UTF16Unit * utf16Pos = utf16Out;
|
|
|
|
size_t utf32Left = utf32Len;
|
|
size_t utf16Left = utf16Len;
|
|
|
|
UC_Assert ( (utf32In != 0) && (utf16Out != 0) && (utf32Read != 0) && (utf16Written != 0) );
|
|
|
|
while ( (utf32Left > 0) && (utf16Left > 0) ) {
|
|
|
|
// Do a run of BMP, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf32Left;
|
|
if ( limit > utf16Left ) limit = utf16Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF32Unit inUnit = *utf32Pos;
|
|
if ( inUnit > 0xFFFF ) break;
|
|
UTF16OutSwap ( utf16Pos, UTF16Unit(inUnit) );
|
|
++utf32Pos;
|
|
++utf16Pos;
|
|
}
|
|
utf32Left -= i;
|
|
utf16Left -= i;
|
|
|
|
// Do a run of non-BMP, it copies 1 input unit into 2 output units.
|
|
while ( (utf32Left > 0) && (utf16Left > 0) ) {
|
|
size_t len;
|
|
UTF32Unit inUnit = *utf32Pos;
|
|
if ( inUnit <= 0xFFFF ) break;
|
|
CodePoint_to_UTF16Swp_Surrogate ( inUnit, utf16Pos, utf16Left, &len );
|
|
if ( len == 0 ) goto Done; // Not enough room in the output buffer.
|
|
UC_Assert ( len == 2 );
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
utf16Left -= 2;
|
|
utf16Pos += 2;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf32Read = utf32Len - utf32Left;
|
|
*utf16Written = utf16Len - utf16Left;
|
|
|
|
} // UTF32Nat_to_UTF16Swp
|
|
|
|
// =================================================================================================
|
|
|
|
static void UTF32Swp_to_UTF16Nat ( const UTF32Unit * utf32In, const size_t utf32Len,
|
|
UTF16Unit * utf16Out, const size_t utf16Len,
|
|
size_t * utf32Read, size_t * utf16Written )
|
|
{
|
|
const UTF32Unit * utf32Pos = utf32In;
|
|
UTF16Unit * utf16Pos = utf16Out;
|
|
|
|
size_t utf32Left = utf32Len;
|
|
size_t utf16Left = utf16Len;
|
|
|
|
UC_Assert ( (utf32In != 0) && (utf16Out != 0) && (utf32Read != 0) && (utf16Written != 0) );
|
|
|
|
while ( (utf32Left > 0) && (utf16Left > 0) ) {
|
|
|
|
// Do a run of BMP, it copies 1 input unit into 1 output unit.
|
|
size_t i, limit = utf32Left;
|
|
if ( limit > utf16Left ) limit = utf16Left;
|
|
for ( i = 0; i < limit; ++i ) {
|
|
UTF32Unit inUnit = UTF32InSwap(utf32Pos);
|
|
if ( inUnit > 0xFFFF ) break;
|
|
*utf16Pos = UTF16Unit(inUnit);
|
|
++utf32Pos;
|
|
++utf16Pos;
|
|
}
|
|
utf32Left -= i;
|
|
utf16Left -= i;
|
|
|
|
// Do a run of non-BMP, it copies 1 input unit into 2 output units.
|
|
while ( (utf32Left > 0) && (utf16Left > 0) ) {
|
|
size_t len;
|
|
UTF32Unit inUnit = UTF32InSwap(utf32Pos);
|
|
if ( inUnit <= 0xFFFF ) break;
|
|
CodePoint_to_UTF16Nat_Surrogate ( inUnit, utf16Pos, utf16Left, &len );
|
|
if ( len == 0 ) goto Done; // Not enough room in the output buffer.
|
|
UC_Assert ( len == 2 );
|
|
utf32Left -= 1;
|
|
utf32Pos += 1;
|
|
utf16Left -= 2;
|
|
utf16Pos += 2;
|
|
}
|
|
|
|
}
|
|
|
|
Done: // Set the output lengths.
|
|
*utf32Read = utf32Len - utf32Left;
|
|
*utf16Written = utf16Len - utf16Left;
|
|
|
|
} // UTF32Swp_to_UTF16Nat
|
|
|
|
// =================================================================================================
|