1319 lines
41 KiB
C
1319 lines
41 KiB
C
/*
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**********************************************************************
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* Copyright (C) 2002, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* file name: ucnv_u32.c
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2002jul01
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* created by: Markus W. Scherer
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*
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* UTF-32 converter implementation. Used to be in ucnv_utf.c.
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*/
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#include "unicode/utypes.h"
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#include "unicode/ucnv.h"
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#include "unicode/ucnv_err.h"
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#include "ucnv_bld.h"
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#include "ucnv_cnv.h"
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#include "cmemory.h"
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#define MAXIMUM_UCS2 0x0000FFFF
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#define MAXIMUM_UTF 0x0010FFFF
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#define MAXIMUM_UCS4 0x7FFFFFFF
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#define HALF_SHIFT 10
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#define HALF_BASE 0x0010000
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#define HALF_MASK 0x3FF
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#define SURROGATE_HIGH_START 0xD800
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#define SURROGATE_HIGH_END 0xDBFF
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#define SURROGATE_LOW_START 0xDC00
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#define SURROGATE_LOW_END 0xDFFF
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/* -SURROGATE_LOW_START + HALF_BASE */
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#define SURROGATE_LOW_BASE 9216
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/**
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* Calls invalid char callback when an invalid character sequence is encountered.
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* It presumes that the converter has a callback to call.
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*
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* @returns true when callback fails
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*/
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static UBool
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T_UConverter_toUnicode_InvalidChar_Callback(UConverterToUnicodeArgs * args,
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UConverterCallbackReason reason,
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UErrorCode *err)
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{
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UConverter *converter = args->converter;
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if (U_SUCCESS(*err))
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{
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if (reason == UCNV_ILLEGAL) {
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*err = U_ILLEGAL_CHAR_FOUND;
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} else {
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*err = U_INVALID_CHAR_FOUND;
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}
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}
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/* copy the toUBytes to the invalidCharBuffer */
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uprv_memcpy(converter->invalidCharBuffer,
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converter->toUBytes,
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converter->invalidCharLength);
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/* Call the ErrorFunction */
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args->converter->fromCharErrorBehaviour(converter->toUContext,
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args,
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converter->invalidCharBuffer,
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converter->invalidCharLength,
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reason,
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err);
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return (UBool)U_FAILURE(*err);
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}
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static UBool
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T_UConverter_toUnicode_InvalidChar_OffsetCallback(UConverterToUnicodeArgs * args,
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int32_t currentOffset,
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UConverterCallbackReason reason,
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UErrorCode *err)
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{
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int32_t *saveOffsets = args->offsets;
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UBool result;
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result = T_UConverter_toUnicode_InvalidChar_Callback(args, reason, err);
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while (saveOffsets < args->offsets)
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{
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*(saveOffsets++) = currentOffset;
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}
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return result;
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}
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/* UTF-32BE ----------------------------------------------------------------- */
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static void
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T_UConverter_toUnicode_UTF32_BE(UConverterToUnicodeArgs * args,
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UErrorCode * err)
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{
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const unsigned char *mySource = (unsigned char *) args->source;
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UChar *myTarget = args->target;
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const unsigned char *sourceLimit = (unsigned char *) args->sourceLimit;
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const UChar *targetLimit = args->targetLimit;
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unsigned char *toUBytes = args->converter->toUBytes;
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uint32_t ch, i;
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/* UTF-8 returns here for only non-offset, this needs to change.*/
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if (args->converter->toUnicodeStatus && myTarget < targetLimit)
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{
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i = args->converter->toULength; /* restore # of bytes consumed */
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ch = args->converter->toUnicodeStatus - 1;/*Stores the previously calculated ch from a previous call*/
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args->converter->toUnicodeStatus = 0;
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goto morebytes;
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}
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while (mySource < sourceLimit && myTarget < targetLimit)
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{
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i = 0;
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ch = 0;
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morebytes:
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while (i < sizeof(uint32_t))
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{
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if (mySource < sourceLimit)
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{
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ch = (ch << 8) | (uint8_t)(*mySource);
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toUBytes[i++] = (char) *(mySource++);
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}
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else
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{
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if (args->flush)
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{
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if (U_SUCCESS(*err))
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{
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*err = U_TRUNCATED_CHAR_FOUND;
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args->converter->toUnicodeStatus = MAXIMUM_UCS4;
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}
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}
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else
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{ /* stores a partially calculated target*/
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/* + 1 to make 0 a valid character */
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args->converter->toUnicodeStatus = ch + 1;
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args->converter->toULength = (int8_t) i;
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}
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goto donefornow;
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}
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}
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if (ch <= MAXIMUM_UTF)
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{
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/* Normal valid byte when the loop has not prematurely terminated (i < inBytes) */
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if (ch <= MAXIMUM_UCS2)
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{
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/* fits in 16 bits */
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*(myTarget++) = (UChar) ch;
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}
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else
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{
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/* write out the surrogates */
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ch -= HALF_BASE;
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*(myTarget++) = (UChar) ((ch >> HALF_SHIFT) + SURROGATE_HIGH_START);
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ch = (ch & HALF_MASK) + SURROGATE_LOW_START;
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if (myTarget < targetLimit)
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{
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*(myTarget++) = (UChar)ch;
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}
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else
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{
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/* Put in overflow buffer (not handled here) */
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args->converter->UCharErrorBuffer[0] = (UChar) ch;
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args->converter->UCharErrorBufferLength = 1;
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*err = U_BUFFER_OVERFLOW_ERROR;
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break;
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}
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}
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}
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else
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{
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args->source = (const char *) mySource;
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args->target = myTarget;
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args->converter->invalidCharLength = (int8_t)i;
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if (T_UConverter_toUnicode_InvalidChar_Callback(args, UCNV_ILLEGAL, err))
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{
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/* Stop if the error wasn't handled */
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break;
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}
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args->converter->invalidCharLength = 0;
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mySource = (unsigned char *) args->source;
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myTarget = args->target;
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}
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}
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donefornow:
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if (mySource < sourceLimit && myTarget >= targetLimit && U_SUCCESS(*err))
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{
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/* End of target buffer */
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*err = U_BUFFER_OVERFLOW_ERROR;
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}
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args->target = myTarget;
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args->source = (const char *) mySource;
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}
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static void
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T_UConverter_toUnicode_UTF32_BE_OFFSET_LOGIC(UConverterToUnicodeArgs * args,
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UErrorCode * err)
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{
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const unsigned char *mySource = (unsigned char *) args->source;
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UChar *myTarget = args->target;
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int32_t *myOffsets = args->offsets;
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const unsigned char *sourceLimit = (unsigned char *) args->sourceLimit;
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const UChar *targetLimit = args->targetLimit;
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unsigned char *toUBytes = args->converter->toUBytes;
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uint32_t ch, i;
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int32_t offsetNum = 0;
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if (args->converter->toUnicodeStatus && myTarget < targetLimit)
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{
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i = args->converter->toULength; /* restore # of bytes consumed */
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ch = args->converter->toUnicodeStatus - 1;/*Stores the previously calculated ch from a previous call*/
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args->converter->toUnicodeStatus = 0;
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goto morebytes;
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}
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while (mySource < sourceLimit && myTarget < targetLimit)
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{
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i = 0;
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ch = 0;
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morebytes:
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while (i < sizeof(uint32_t))
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{
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if (mySource < sourceLimit)
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{
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ch = (ch << 8) | (uint8_t)(*mySource);
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toUBytes[i++] = (char) *(mySource++);
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}
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else
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{
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if (args->flush)
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{
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if (U_SUCCESS(*err))
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{
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*err = U_TRUNCATED_CHAR_FOUND;
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args->converter->toUnicodeStatus = MAXIMUM_UCS4;
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}
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}
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else
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{ /* stores a partially calculated target*/
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/* + 1 to make 0 a valid character */
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args->converter->toUnicodeStatus = ch + 1;
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args->converter->toULength = (int8_t) i;
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}
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goto donefornow;
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}
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}
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if (ch <= MAXIMUM_UTF)
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{
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/* Normal valid byte when the loop has not prematurely terminated (i < inBytes) */
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if (ch <= MAXIMUM_UCS2)
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{
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/* fits in 16 bits */
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*(myTarget++) = (UChar) ch;
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*(myOffsets++) = offsetNum;
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}
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else
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{
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/* write out the surrogates */
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ch -= HALF_BASE;
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*(myTarget++) = (UChar) ((ch >> HALF_SHIFT) + SURROGATE_HIGH_START);
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*myOffsets++ = offsetNum;
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ch = (ch & HALF_MASK) + SURROGATE_LOW_START;
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if (myTarget < targetLimit)
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{
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*(myTarget++) = (UChar)ch;
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*(myOffsets++) = offsetNum;
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}
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else
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{
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/* Put in overflow buffer (not handled here) */
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args->converter->UCharErrorBuffer[0] = (UChar) ch;
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args->converter->UCharErrorBufferLength = 1;
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*err = U_BUFFER_OVERFLOW_ERROR;
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break;
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}
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}
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}
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else
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{
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args->source = (const char *) mySource;
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args->target = myTarget;
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args->converter->invalidCharLength = (int8_t)i;
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args->offsets = myOffsets;
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if (T_UConverter_toUnicode_InvalidChar_OffsetCallback(args, offsetNum, UCNV_ILLEGAL, err))
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{
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/* Stop if the error wasn't handled */
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break;
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}
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args->converter->invalidCharLength = 0;
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mySource = (unsigned char *) args->source;
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myTarget = args->target;
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myOffsets = args->offsets;
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}
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offsetNum += i;
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}
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donefornow:
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if (mySource < sourceLimit && myTarget >= targetLimit && U_SUCCESS(*err))
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{
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/* End of target buffer */
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*err = U_BUFFER_OVERFLOW_ERROR;
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}
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args->target = myTarget;
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args->source = (const char *) mySource;
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args->offsets = myOffsets;
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}
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static void
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T_UConverter_fromUnicode_UTF32_BE(UConverterFromUnicodeArgs * args,
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UErrorCode * err)
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{
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const UChar *mySource = args->source;
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unsigned char *myTarget = (unsigned char *) args->target;
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const UChar *sourceLimit = args->sourceLimit;
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const unsigned char *targetLimit = (unsigned char *) args->targetLimit;
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UChar32 ch, ch2;
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unsigned int indexToWrite;
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unsigned char temp[sizeof(uint32_t)];
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temp[0] = 0;
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if (args->converter->fromUnicodeStatus)
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{
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ch = args->converter->fromUnicodeStatus;
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args->converter->fromUnicodeStatus = 0;
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goto lowsurogate;
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}
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while (mySource < sourceLimit && myTarget < targetLimit)
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{
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ch = *(mySource++);
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if (SURROGATE_HIGH_START <= ch && ch < SURROGATE_LOW_START)
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{
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lowsurogate:
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if (mySource < sourceLimit)
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{
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ch2 = *mySource;
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if (SURROGATE_LOW_START <= ch2 && ch2 <= SURROGATE_LOW_END)
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{
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ch = ((ch - SURROGATE_HIGH_START) << HALF_SHIFT) + ch2 + SURROGATE_LOW_BASE;
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mySource++;
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}
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}
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else if (!args->flush)
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{
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/* ran out of source */
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args->converter->fromUnicodeStatus = ch;
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break;
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}
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}
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/* We cannot get any larger than 10FFFF because we are coming from UTF-16 */
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temp[1] = (uint8_t) (ch >> 16 & 0x1F);
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temp[2] = (uint8_t) (ch >> 8); /* unsigned cast implicitly does (ch & FF) */
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temp[3] = (uint8_t) (ch); /* unsigned cast implicitly does (ch & FF) */
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for (indexToWrite = 0; indexToWrite <= sizeof(uint32_t) - 1; indexToWrite++)
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{
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if (myTarget < targetLimit)
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{
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*(myTarget++) = temp[indexToWrite];
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}
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else
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{
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args->converter->charErrorBuffer[args->converter->charErrorBufferLength++] = temp[indexToWrite];
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*err = U_BUFFER_OVERFLOW_ERROR;
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}
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}
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}
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if (mySource < sourceLimit && myTarget >= targetLimit && U_SUCCESS(*err))
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{
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*err = U_BUFFER_OVERFLOW_ERROR;
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}
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args->target = (char *) myTarget;
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args->source = mySource;
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}
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static void
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T_UConverter_fromUnicode_UTF32_BE_OFFSET_LOGIC(UConverterFromUnicodeArgs * args,
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UErrorCode * err)
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{
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const UChar *mySource = args->source;
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unsigned char *myTarget = (unsigned char *) args->target;
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int32_t *myOffsets = args->offsets;
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const UChar *sourceLimit = args->sourceLimit;
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const unsigned char *targetLimit = (unsigned char *) args->targetLimit;
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UChar32 ch, ch2;
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int32_t offsetNum = 0;
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unsigned int indexToWrite;
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unsigned char temp[sizeof(uint32_t)];
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temp[0] = 0;
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if (args->converter->fromUnicodeStatus)
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{
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ch = args->converter->fromUnicodeStatus;
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args->converter->fromUnicodeStatus = 0;
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goto lowsurogate;
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}
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while (mySource < sourceLimit && myTarget < targetLimit)
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{
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ch = *(mySource++);
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if (SURROGATE_HIGH_START <= ch && ch < SURROGATE_LOW_START)
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{
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lowsurogate:
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if (mySource < sourceLimit)
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{
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ch2 = *mySource;
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if (SURROGATE_LOW_START <= ch2 && ch2 <= SURROGATE_LOW_END)
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{
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ch = ((ch - SURROGATE_HIGH_START) << HALF_SHIFT) + ch2 + SURROGATE_LOW_BASE;
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mySource++;
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}
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}
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else if (!args->flush)
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{
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/* ran out of source */
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args->converter->fromUnicodeStatus = ch;
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break;
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}
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}
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/* We cannot get any larger than 10FFFF because we are coming from UTF-16 */
|
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temp[1] = (uint8_t) (ch >> 16 & 0x1F);
|
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temp[2] = (uint8_t) (ch >> 8); /* unsigned cast implicitly does (ch & FF) */
|
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temp[3] = (uint8_t) (ch); /* unsigned cast implicitly does (ch & FF) */
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|
|
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for (indexToWrite = 0; indexToWrite <= sizeof(uint32_t) - 1; indexToWrite++)
|
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{
|
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if (myTarget < targetLimit)
|
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{
|
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*(myTarget++) = temp[indexToWrite];
|
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*(myOffsets++) = offsetNum;
|
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}
|
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else
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{
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args->converter->charErrorBuffer[args->converter->charErrorBufferLength++] = temp[indexToWrite];
|
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*err = U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
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}
|
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offsetNum++;
|
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}
|
|
|
|
if (mySource < sourceLimit && myTarget >= targetLimit && U_SUCCESS(*err))
|
|
{
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
|
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args->target = (char *) myTarget;
|
|
args->source = mySource;
|
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args->offsets = myOffsets;
|
|
}
|
|
|
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static UChar32
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T_UConverter_getNextUChar_UTF32_BE(UConverterToUnicodeArgs* args,
|
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UErrorCode* err)
|
|
{
|
|
UChar myUCharBuf[2];
|
|
UChar *myUCharPtr;
|
|
const unsigned char *mySource;
|
|
UChar32 myUChar;
|
|
int32_t length;
|
|
|
|
while (args->source < args->sourceLimit)
|
|
{
|
|
if (args->source + 4 > args->sourceLimit)
|
|
{
|
|
/* got a partial character */
|
|
*err = U_TRUNCATED_CHAR_FOUND;
|
|
return 0xffff;
|
|
}
|
|
|
|
/* Don't even try to do a direct cast because the value may be on an odd address. */
|
|
mySource = (unsigned char *) args->source;
|
|
myUChar = (mySource[0] << 24)
|
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| (mySource[1] << 16)
|
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| (mySource[2] << 8)
|
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| (mySource[3]);
|
|
|
|
args->source = (const char *)(mySource + 4);
|
|
if (myUChar <= MAXIMUM_UTF && myUChar >= 0) {
|
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return myUChar;
|
|
}
|
|
|
|
uprv_memcpy(args->converter->invalidCharBuffer, mySource, 4);
|
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args->converter->invalidCharLength = 4;
|
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|
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myUCharPtr = myUCharBuf;
|
|
*err = U_ILLEGAL_CHAR_FOUND;
|
|
args->target = myUCharPtr;
|
|
args->targetLimit = myUCharBuf + 2;
|
|
args->converter->fromCharErrorBehaviour(args->converter->toUContext,
|
|
args,
|
|
(const char *)mySource,
|
|
4,
|
|
UCNV_ILLEGAL,
|
|
err);
|
|
|
|
if(U_SUCCESS(*err)) {
|
|
length = (uint16_t)(args->target - myUCharBuf);
|
|
if(length > 0) {
|
|
return ucnv_getUChar32KeepOverflow(args->converter, myUCharBuf, length);
|
|
}
|
|
/* else (callback did not write anything) continue */
|
|
} else if(*err == U_BUFFER_OVERFLOW_ERROR) {
|
|
*err = U_ZERO_ERROR;
|
|
return ucnv_getUChar32KeepOverflow(args->converter, myUCharBuf, 2);
|
|
} else {
|
|
/* break on error */
|
|
/* ### what if a callback set an error but _also_ generated output?! */
|
|
return 0xffff;
|
|
}
|
|
}
|
|
|
|
/* no input or only skipping callbacks */
|
|
*err = U_INDEX_OUTOFBOUNDS_ERROR;
|
|
return 0xffff;
|
|
}
|
|
|
|
static const UConverterImpl _UTF32BEImpl = {
|
|
UCNV_UTF32_BigEndian,
|
|
|
|
NULL,
|
|
NULL,
|
|
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
|
|
T_UConverter_toUnicode_UTF32_BE,
|
|
T_UConverter_toUnicode_UTF32_BE_OFFSET_LOGIC,
|
|
T_UConverter_fromUnicode_UTF32_BE,
|
|
T_UConverter_fromUnicode_UTF32_BE_OFFSET_LOGIC,
|
|
T_UConverter_getNextUChar_UTF32_BE,
|
|
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
/* The 1232 CCSID refers to any version of Unicode with any endianess of UTF-32 */
|
|
static const UConverterStaticData _UTF32BEStaticData = {
|
|
sizeof(UConverterStaticData),
|
|
"UTF-32BE",
|
|
1232,
|
|
UCNV_IBM, UCNV_UTF32_BigEndian, 4, 4,
|
|
{ 0, 0, 0xff, 0xfd }, 4, FALSE, FALSE,
|
|
0,
|
|
0,
|
|
{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */
|
|
};
|
|
|
|
const UConverterSharedData _UTF32BEData = {
|
|
sizeof(UConverterSharedData), ~((uint32_t) 0),
|
|
NULL, NULL, &_UTF32BEStaticData, FALSE, &_UTF32BEImpl,
|
|
0
|
|
};
|
|
|
|
/* UTF-32LE ---------------------------------------------------------- */
|
|
|
|
static void
|
|
T_UConverter_toUnicode_UTF32_LE(UConverterToUnicodeArgs * args,
|
|
UErrorCode * err)
|
|
{
|
|
const unsigned char *mySource = (unsigned char *) args->source;
|
|
UChar *myTarget = args->target;
|
|
const unsigned char *sourceLimit = (unsigned char *) args->sourceLimit;
|
|
const UChar *targetLimit = args->targetLimit;
|
|
unsigned char *toUBytes = args->converter->toUBytes;
|
|
uint32_t ch, i;
|
|
|
|
/* UTF-8 returns here for only non-offset, this needs to change.*/
|
|
if (args->converter->toUnicodeStatus && myTarget < targetLimit)
|
|
{
|
|
i = args->converter->toULength; /* restore # of bytes consumed */
|
|
|
|
/* Stores the previously calculated ch from a previous call*/
|
|
ch = args->converter->toUnicodeStatus - 1;
|
|
args->converter->toUnicodeStatus = 0;
|
|
goto morebytes;
|
|
}
|
|
|
|
while (mySource < sourceLimit && myTarget < targetLimit)
|
|
{
|
|
i = 0;
|
|
ch = 0;
|
|
morebytes:
|
|
while (i < sizeof(uint32_t))
|
|
{
|
|
if (mySource < sourceLimit)
|
|
{
|
|
ch |= ((uint8_t)(*mySource)) << (i * 8);
|
|
toUBytes[i++] = (char) *(mySource++);
|
|
}
|
|
else
|
|
{
|
|
if (args->flush)
|
|
{
|
|
if (U_SUCCESS(*err))
|
|
{
|
|
*err = U_TRUNCATED_CHAR_FOUND;
|
|
args->converter->toUnicodeStatus = 0;
|
|
}
|
|
}
|
|
else
|
|
{ /* stores a partially calculated target*/
|
|
/* + 1 to make 0 a valid character */
|
|
args->converter->toUnicodeStatus = ch + 1;
|
|
args->converter->toULength = (int8_t) i;
|
|
}
|
|
goto donefornow;
|
|
}
|
|
}
|
|
|
|
if (ch <= MAXIMUM_UTF)
|
|
{
|
|
/* Normal valid byte when the loop has not prematurely terminated (i < inBytes) */
|
|
if (ch <= MAXIMUM_UCS2)
|
|
{
|
|
/* fits in 16 bits */
|
|
*(myTarget++) = (UChar) ch;
|
|
}
|
|
else
|
|
{
|
|
/* write out the surrogates */
|
|
ch -= HALF_BASE;
|
|
*(myTarget++) = (UChar) ((ch >> HALF_SHIFT) + SURROGATE_HIGH_START);
|
|
ch = (ch & HALF_MASK) + SURROGATE_LOW_START;
|
|
if (myTarget < targetLimit)
|
|
{
|
|
*(myTarget++) = (UChar)ch;
|
|
}
|
|
else
|
|
{
|
|
/* Put in overflow buffer (not handled here) */
|
|
args->converter->UCharErrorBuffer[0] = (UChar) ch;
|
|
args->converter->UCharErrorBufferLength = 1;
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
args->source = (const char *) mySource;
|
|
args->target = myTarget;
|
|
args->converter->invalidCharLength = (int8_t)i;
|
|
if (T_UConverter_toUnicode_InvalidChar_Callback(args, UCNV_ILLEGAL, err))
|
|
{
|
|
/* Stop if the error wasn't handled */
|
|
break;
|
|
}
|
|
args->converter->invalidCharLength = 0;
|
|
mySource = (unsigned char *) args->source;
|
|
myTarget = args->target;
|
|
}
|
|
}
|
|
|
|
donefornow:
|
|
if (mySource < sourceLimit && myTarget >= targetLimit && U_SUCCESS(*err))
|
|
{
|
|
/* End of target buffer */
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
|
|
args->target = myTarget;
|
|
args->source = (const char *) mySource;
|
|
}
|
|
|
|
static void
|
|
T_UConverter_toUnicode_UTF32_LE_OFFSET_LOGIC(UConverterToUnicodeArgs * args,
|
|
UErrorCode * err)
|
|
{
|
|
const unsigned char *mySource = (unsigned char *) args->source;
|
|
UChar *myTarget = args->target;
|
|
int32_t *myOffsets = args->offsets;
|
|
const unsigned char *sourceLimit = (unsigned char *) args->sourceLimit;
|
|
const UChar *targetLimit = args->targetLimit;
|
|
unsigned char *toUBytes = args->converter->toUBytes;
|
|
uint32_t ch, i;
|
|
int32_t offsetNum = 0;
|
|
|
|
/* UTF-8 returns here for only non-offset, this needs to change.*/
|
|
if (args->converter->toUnicodeStatus && myTarget < targetLimit)
|
|
{
|
|
i = args->converter->toULength; /* restore # of bytes consumed */
|
|
|
|
/* Stores the previously calculated ch from a previous call*/
|
|
ch = args->converter->toUnicodeStatus - 1;
|
|
args->converter->toUnicodeStatus = 0;
|
|
goto morebytes;
|
|
}
|
|
|
|
while (mySource < sourceLimit && myTarget < targetLimit)
|
|
{
|
|
i = 0;
|
|
ch = 0;
|
|
morebytes:
|
|
while (i < sizeof(uint32_t))
|
|
{
|
|
if (mySource < sourceLimit)
|
|
{
|
|
ch |= ((uint8_t)(*mySource)) << (i * 8);
|
|
toUBytes[i++] = (char) *(mySource++);
|
|
}
|
|
else
|
|
{
|
|
if (args->flush)
|
|
{
|
|
if (U_SUCCESS(*err))
|
|
{
|
|
*err = U_TRUNCATED_CHAR_FOUND;
|
|
args->converter->toUnicodeStatus = 0;
|
|
}
|
|
}
|
|
else
|
|
{ /* stores a partially calculated target*/
|
|
/* + 1 to make 0 a valid character */
|
|
args->converter->toUnicodeStatus = ch + 1;
|
|
args->converter->toULength = (int8_t) i;
|
|
}
|
|
goto donefornow;
|
|
}
|
|
}
|
|
|
|
if (ch <= MAXIMUM_UTF)
|
|
{
|
|
/* Normal valid byte when the loop has not prematurely terminated (i < inBytes) */
|
|
if (ch <= MAXIMUM_UCS2)
|
|
{
|
|
/* fits in 16 bits */
|
|
*(myTarget++) = (UChar) ch;
|
|
*(myOffsets++) = offsetNum;
|
|
}
|
|
else
|
|
{
|
|
/* write out the surrogates */
|
|
ch -= HALF_BASE;
|
|
*(myTarget++) = (UChar) ((ch >> HALF_SHIFT) + SURROGATE_HIGH_START);
|
|
*(myOffsets++) = offsetNum;
|
|
ch = (ch & HALF_MASK) + SURROGATE_LOW_START;
|
|
if (myTarget < targetLimit)
|
|
{
|
|
*(myTarget++) = (UChar)ch;
|
|
*(myOffsets++) = offsetNum;
|
|
}
|
|
else
|
|
{
|
|
/* Put in overflow buffer (not handled here) */
|
|
args->converter->UCharErrorBuffer[0] = (UChar) ch;
|
|
args->converter->UCharErrorBufferLength = 1;
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
args->source = (const char *) mySource;
|
|
args->target = myTarget;
|
|
args->converter->invalidCharLength = (int8_t)i;
|
|
args->offsets = myOffsets;
|
|
if (T_UConverter_toUnicode_InvalidChar_OffsetCallback(args, offsetNum, UCNV_ILLEGAL, err))
|
|
{
|
|
/* Stop if the error wasn't handled */
|
|
break;
|
|
}
|
|
args->converter->invalidCharLength = 0;
|
|
mySource = (unsigned char *) args->source;
|
|
myTarget = args->target;
|
|
myOffsets = args->offsets;
|
|
}
|
|
offsetNum += i;
|
|
}
|
|
|
|
donefornow:
|
|
if (mySource < sourceLimit && myTarget >= targetLimit && U_SUCCESS(*err))
|
|
{
|
|
/* End of target buffer */
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
|
|
args->target = myTarget;
|
|
args->source = (const char *) mySource;
|
|
args->offsets = myOffsets;
|
|
}
|
|
|
|
static void
|
|
T_UConverter_fromUnicode_UTF32_LE(UConverterFromUnicodeArgs * args,
|
|
UErrorCode * err)
|
|
{
|
|
const UChar *mySource = args->source;
|
|
unsigned char *myTarget = (unsigned char *) args->target;
|
|
const UChar *sourceLimit = args->sourceLimit;
|
|
const unsigned char *targetLimit = (unsigned char *) args->targetLimit;
|
|
UChar32 ch, ch2;
|
|
unsigned int indexToWrite;
|
|
unsigned char temp[sizeof(uint32_t)];
|
|
|
|
temp[3] = 0;
|
|
|
|
if (args->converter->fromUnicodeStatus)
|
|
{
|
|
ch = args->converter->fromUnicodeStatus;
|
|
args->converter->fromUnicodeStatus = 0;
|
|
goto lowsurogate;
|
|
}
|
|
|
|
while (mySource < sourceLimit && myTarget < targetLimit)
|
|
{
|
|
ch = *(mySource++);
|
|
|
|
if (SURROGATE_HIGH_START <= ch && ch < SURROGATE_LOW_START)
|
|
{
|
|
lowsurogate:
|
|
if (mySource < sourceLimit)
|
|
{
|
|
ch2 = *mySource;
|
|
if (SURROGATE_LOW_START <= ch2 && ch2 <= SURROGATE_LOW_END)
|
|
{
|
|
ch = ((ch - SURROGATE_HIGH_START) << HALF_SHIFT) + ch2 + SURROGATE_LOW_BASE;
|
|
mySource++;
|
|
}
|
|
}
|
|
else if (!args->flush)
|
|
{
|
|
/* ran out of source */
|
|
args->converter->fromUnicodeStatus = ch;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We cannot get any larger than 10FFFF because we are coming from UTF-16 */
|
|
temp[2] = (uint8_t) (ch >> 16 & 0x1F);
|
|
temp[1] = (uint8_t) (ch >> 8); /* unsigned cast implicitly does (ch & FF) */
|
|
temp[0] = (uint8_t) (ch); /* unsigned cast implicitly does (ch & FF) */
|
|
|
|
for (indexToWrite = 0; indexToWrite <= sizeof(uint32_t) - 1; indexToWrite++)
|
|
{
|
|
if (myTarget < targetLimit)
|
|
{
|
|
*(myTarget++) = temp[indexToWrite];
|
|
}
|
|
else
|
|
{
|
|
args->converter->charErrorBuffer[args->converter->charErrorBufferLength++] = temp[indexToWrite];
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (mySource < sourceLimit && myTarget >= targetLimit && U_SUCCESS(*err))
|
|
{
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
|
|
args->target = (char *) myTarget;
|
|
args->source = mySource;
|
|
}
|
|
|
|
static void
|
|
T_UConverter_fromUnicode_UTF32_LE_OFFSET_LOGIC(UConverterFromUnicodeArgs * args,
|
|
UErrorCode * err)
|
|
{
|
|
const UChar *mySource = args->source;
|
|
unsigned char *myTarget = (unsigned char *) args->target;
|
|
int32_t *myOffsets = args->offsets;
|
|
const UChar *sourceLimit = args->sourceLimit;
|
|
const unsigned char *targetLimit = (unsigned char *) args->targetLimit;
|
|
UChar32 ch, ch2;
|
|
unsigned int indexToWrite;
|
|
unsigned char temp[sizeof(uint32_t)];
|
|
int32_t offsetNum = 0;
|
|
|
|
temp[3] = 0;
|
|
|
|
if (args->converter->fromUnicodeStatus)
|
|
{
|
|
ch = args->converter->fromUnicodeStatus;
|
|
args->converter->fromUnicodeStatus = 0;
|
|
goto lowsurogate;
|
|
}
|
|
|
|
while (mySource < sourceLimit && myTarget < targetLimit)
|
|
{
|
|
ch = *(mySource++);
|
|
|
|
if (SURROGATE_HIGH_START <= ch && ch < SURROGATE_LOW_START)
|
|
{
|
|
lowsurogate:
|
|
if (mySource < sourceLimit)
|
|
{
|
|
ch2 = *mySource;
|
|
if (SURROGATE_LOW_START <= ch2 && ch2 <= SURROGATE_LOW_END)
|
|
{
|
|
ch = ((ch - SURROGATE_HIGH_START) << HALF_SHIFT) + ch2 + SURROGATE_LOW_BASE;
|
|
mySource++;
|
|
}
|
|
}
|
|
else if (!args->flush)
|
|
{
|
|
/* ran out of source */
|
|
args->converter->fromUnicodeStatus = ch;
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* We cannot get any larger than 10FFFF because we are coming from UTF-16 */
|
|
temp[2] = (uint8_t) (ch >> 16 & 0x1F);
|
|
temp[1] = (uint8_t) (ch >> 8); /* unsigned cast implicitly does (ch & FF) */
|
|
temp[0] = (uint8_t) (ch); /* unsigned cast implicitly does (ch & FF) */
|
|
|
|
for (indexToWrite = 0; indexToWrite <= sizeof(uint32_t) - 1; indexToWrite++)
|
|
{
|
|
if (myTarget < targetLimit)
|
|
{
|
|
*(myTarget++) = temp[indexToWrite];
|
|
*(myOffsets++) = offsetNum;
|
|
}
|
|
else
|
|
{
|
|
args->converter->charErrorBuffer[args->converter->charErrorBufferLength++] = temp[indexToWrite];
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
}
|
|
offsetNum++;
|
|
}
|
|
|
|
if (mySource < sourceLimit && myTarget >= targetLimit && U_SUCCESS(*err))
|
|
{
|
|
*err = U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
|
|
args->target = (char *) myTarget;
|
|
args->source = mySource;
|
|
args->offsets = myOffsets;
|
|
}
|
|
|
|
static UChar32
|
|
T_UConverter_getNextUChar_UTF32_LE(UConverterToUnicodeArgs* args,
|
|
UErrorCode* err)
|
|
{
|
|
UChar myUCharBuf[2];
|
|
UChar *myUCharPtr;
|
|
const unsigned char *mySource;
|
|
UChar32 myUChar;
|
|
int32_t length;
|
|
|
|
while (args->source < args->sourceLimit)
|
|
{
|
|
if (args->source + 4 > args->sourceLimit)
|
|
{
|
|
/* got a partial character */
|
|
*err = U_TRUNCATED_CHAR_FOUND;
|
|
return 0xffff;
|
|
}
|
|
|
|
/* Don't even try to do a direct cast because the value may be on an odd address. */
|
|
mySource = (unsigned char *) args->source;
|
|
myUChar = (mySource[0])
|
|
| (mySource[1] << 8)
|
|
| (mySource[2] << 16)
|
|
| (mySource[3] << 24);
|
|
|
|
args->source = (const char *)(mySource + 4);
|
|
if (myUChar <= MAXIMUM_UTF && myUChar >= 0) {
|
|
return myUChar;
|
|
}
|
|
|
|
uprv_memcpy(args->converter->invalidCharBuffer, mySource, 4);
|
|
args->converter->invalidCharLength = 4;
|
|
|
|
myUCharPtr = myUCharBuf;
|
|
*err = U_ILLEGAL_CHAR_FOUND;
|
|
args->target = myUCharPtr;
|
|
args->targetLimit = myUCharBuf + 2;
|
|
args->converter->fromCharErrorBehaviour(args->converter->toUContext,
|
|
args,
|
|
(const char *)mySource,
|
|
4,
|
|
UCNV_ILLEGAL,
|
|
err);
|
|
|
|
if(U_SUCCESS(*err)) {
|
|
length = (uint16_t)(args->target - myUCharBuf);
|
|
if(length > 0) {
|
|
return ucnv_getUChar32KeepOverflow(args->converter, myUCharBuf, length);
|
|
}
|
|
/* else (callback did not write anything) continue */
|
|
} else if(*err == U_BUFFER_OVERFLOW_ERROR) {
|
|
*err = U_ZERO_ERROR;
|
|
return ucnv_getUChar32KeepOverflow(args->converter, myUCharBuf, 2);
|
|
} else {
|
|
/* break on error */
|
|
/* ### what if a callback set an error but _also_ generated output?! */
|
|
return 0xffff;
|
|
}
|
|
}
|
|
|
|
/* no input or only skipping callbacks */
|
|
*err = U_INDEX_OUTOFBOUNDS_ERROR;
|
|
return 0xffff;
|
|
}
|
|
|
|
static const UConverterImpl _UTF32LEImpl = {
|
|
UCNV_UTF32_LittleEndian,
|
|
|
|
NULL,
|
|
NULL,
|
|
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
|
|
T_UConverter_toUnicode_UTF32_LE,
|
|
T_UConverter_toUnicode_UTF32_LE_OFFSET_LOGIC,
|
|
T_UConverter_fromUnicode_UTF32_LE,
|
|
T_UConverter_fromUnicode_UTF32_LE_OFFSET_LOGIC,
|
|
T_UConverter_getNextUChar_UTF32_LE,
|
|
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
/* The 1232 CCSID refers to any version of Unicode with any endianess of UTF-32 */
|
|
static const UConverterStaticData _UTF32LEStaticData = {
|
|
sizeof(UConverterStaticData),
|
|
"UTF-32LE",
|
|
1232,
|
|
UCNV_IBM, UCNV_UTF32_LittleEndian, 4, 4,
|
|
{ 0xfd, 0xff, 0, 0 }, 4, FALSE, FALSE,
|
|
0,
|
|
0,
|
|
{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */
|
|
};
|
|
|
|
|
|
const UConverterSharedData _UTF32LEData = {
|
|
sizeof(UConverterSharedData), ~((uint32_t) 0),
|
|
NULL, NULL, &_UTF32LEStaticData, FALSE, &_UTF32LEImpl,
|
|
0
|
|
};
|
|
|
|
/* UTF-32 (Detect BOM) ------------------------------------------------------ */
|
|
|
|
/*
|
|
* Detect a BOM at the beginning of the stream and select UTF-32BE or UTF-32LE
|
|
* accordingly.
|
|
*
|
|
* State values:
|
|
* 0 initial state
|
|
* 1 saw 00
|
|
* 2 saw 00 00
|
|
* 3 saw 00 00 FE
|
|
* 4 -
|
|
* 5 saw FF
|
|
* 6 saw FF FE
|
|
* 7 saw FF FE 00
|
|
* 8 UTF-32BE mode
|
|
* 9 UTF-32LE mode
|
|
*
|
|
* During detection: state&3==number of matching bytes so far.
|
|
*
|
|
* On output, emit U+FEFF as the first code point.
|
|
*/
|
|
|
|
static void
|
|
_UTF32Reset(UConverter *cnv, UConverterResetChoice choice) {
|
|
if(choice<=UCNV_RESET_TO_UNICODE) {
|
|
/* reset toUnicode: state=0 */
|
|
cnv->mode=0;
|
|
}
|
|
if(choice!=UCNV_RESET_TO_UNICODE) {
|
|
/* reset fromUnicode: prepare to output the UTF-32PE BOM */
|
|
cnv->charErrorBufferLength=4;
|
|
#if U_IS_BIG_ENDIAN
|
|
cnv->charErrorBuffer[0]=0;
|
|
cnv->charErrorBuffer[1]=0;
|
|
cnv->charErrorBuffer[2]=0xfe;
|
|
cnv->charErrorBuffer[3]=0xff;
|
|
#else
|
|
cnv->charErrorBuffer[0]=0xff;
|
|
cnv->charErrorBuffer[1]=0xfe;
|
|
cnv->charErrorBuffer[2]=0;
|
|
cnv->charErrorBuffer[3]=0;
|
|
#endif
|
|
}
|
|
}
|
|
|
|
static void
|
|
_UTF32Open(UConverter *cnv,
|
|
const char *name,
|
|
const char *locale,
|
|
uint32_t options,
|
|
UErrorCode *pErrorCode) {
|
|
_UTF32Reset(cnv, UCNV_RESET_BOTH);
|
|
}
|
|
|
|
static const char utf32BOM[8]={ 0, 0, (char)0xfe, (char)0xff, (char)0xff, (char)0xfe, 0, 0 };
|
|
|
|
static void
|
|
_UTF32ToUnicodeWithOffsets(UConverterToUnicodeArgs *pArgs,
|
|
UErrorCode *pErrorCode) {
|
|
UConverter *cnv=pArgs->converter;
|
|
const char *source=pArgs->source;
|
|
const char *sourceLimit=pArgs->sourceLimit;
|
|
int32_t *offsets=pArgs->offsets;
|
|
|
|
int32_t state, offsetDelta;
|
|
char b;
|
|
|
|
state=cnv->mode;
|
|
|
|
/*
|
|
* If we detect a BOM in this buffer, then we must add the BOM size to the
|
|
* offsets because the actual converter function will not see and count the BOM.
|
|
* offsetDelta will have the number of the BOM bytes that are in the current buffer.
|
|
*/
|
|
offsetDelta=0;
|
|
|
|
while(source<sourceLimit && U_SUCCESS(*pErrorCode)) {
|
|
switch(state) {
|
|
case 0:
|
|
b=*source;
|
|
if(b==0) {
|
|
state=1; /* could be 00 00 FE FF */
|
|
} else if(b==(char)0xff) {
|
|
state=5; /* could be FF FE 00 00 */
|
|
} else {
|
|
state=8; /* default to UTF-32BE */
|
|
continue;
|
|
}
|
|
++source;
|
|
break;
|
|
case 1:
|
|
case 2:
|
|
case 3:
|
|
case 5:
|
|
case 6:
|
|
case 7:
|
|
if(*source==utf32BOM[state]) {
|
|
++state;
|
|
++source;
|
|
if(state==4) {
|
|
state=8; /* detect UTF-32BE */
|
|
offsetDelta=source-pArgs->source;
|
|
} else if(state==8) {
|
|
state=9; /* detect UTF-32LE */
|
|
offsetDelta=source-pArgs->source;
|
|
}
|
|
} else {
|
|
/* switch to UTF-32BE and pass the previous bytes */
|
|
int32_t count=source-pArgs->source; /* number of bytes from this buffer */
|
|
|
|
/* reset the source */
|
|
source=pArgs->source;
|
|
|
|
if(count==(state&3)) {
|
|
/* simple: all in the same buffer, just reset source */
|
|
} else {
|
|
UBool oldFlush=pArgs->flush;
|
|
|
|
/* some of the bytes are from a previous buffer, replay those first */
|
|
pArgs->source=utf32BOM+(state&4); /* select the correct BOM */
|
|
pArgs->sourceLimit=pArgs->source+((state&3)-count); /* replay previous bytes */
|
|
pArgs->flush=FALSE; /* this sourceLimit is not the real source stream limit */
|
|
|
|
/* no offsets: bytes from previous buffer, and not enough for output */
|
|
T_UConverter_toUnicode_UTF32_BE(pArgs, pErrorCode);
|
|
|
|
/* restore real pointers; pArgs->source will be set in case 8/9 */
|
|
pArgs->sourceLimit=sourceLimit;
|
|
pArgs->flush=oldFlush;
|
|
}
|
|
state=8;
|
|
continue;
|
|
}
|
|
break;
|
|
case 8:
|
|
/* call UTF-32BE */
|
|
pArgs->source=source;
|
|
if(offsets==NULL) {
|
|
T_UConverter_toUnicode_UTF32_BE(pArgs, pErrorCode);
|
|
} else {
|
|
T_UConverter_toUnicode_UTF32_BE_OFFSET_LOGIC(pArgs, pErrorCode);
|
|
}
|
|
source=pArgs->source;
|
|
break;
|
|
case 9:
|
|
/* call UTF-32LE */
|
|
pArgs->source=source;
|
|
if(offsets==NULL) {
|
|
T_UConverter_toUnicode_UTF32_LE(pArgs, pErrorCode);
|
|
} else {
|
|
T_UConverter_toUnicode_UTF32_LE_OFFSET_LOGIC(pArgs, pErrorCode);
|
|
}
|
|
source=pArgs->source;
|
|
break;
|
|
default:
|
|
break; /* does not occur */
|
|
}
|
|
}
|
|
|
|
/* add BOM size to offsets - see comment at offsetDelta declaration */
|
|
if(offsets!=NULL && offsetDelta!=0) {
|
|
int32_t *offsetsLimit=pArgs->offsets;
|
|
while(offsets<offsetsLimit) {
|
|
*offsets++ += offsetDelta;
|
|
}
|
|
}
|
|
|
|
if(source==sourceLimit && pArgs->flush) {
|
|
/* handle truncated input */
|
|
switch(state) {
|
|
case 0:
|
|
break; /* no input at all, nothing to do */
|
|
case 8:
|
|
T_UConverter_toUnicode_UTF32_BE(pArgs, pErrorCode);
|
|
break;
|
|
case 9:
|
|
T_UConverter_toUnicode_UTF32_LE(pArgs, pErrorCode);
|
|
break;
|
|
default:
|
|
/* handle 0<state<8: call UTF-32BE with too-short input */
|
|
pArgs->source=utf32BOM+(state&4); /* select the correct BOM */
|
|
pArgs->sourceLimit=pArgs->source+(state&3); /* replay bytes */
|
|
|
|
/* no offsets: not enough for output */
|
|
T_UConverter_toUnicode_UTF32_BE(pArgs, pErrorCode);
|
|
/* pArgs->source restored below */
|
|
pArgs->sourceLimit=sourceLimit;
|
|
break;
|
|
}
|
|
cnv->mode=0; /* reset */
|
|
} else {
|
|
cnv->mode=state;
|
|
}
|
|
|
|
pArgs->source=source;
|
|
}
|
|
|
|
static UChar32
|
|
_UTF32GetNextUChar(UConverterToUnicodeArgs *pArgs,
|
|
UErrorCode *pErrorCode) {
|
|
switch(pArgs->converter->mode) {
|
|
case 8:
|
|
return T_UConverter_getNextUChar_UTF32_BE(pArgs, pErrorCode);
|
|
case 9:
|
|
return T_UConverter_getNextUChar_UTF32_LE(pArgs, pErrorCode);
|
|
default:
|
|
return ucnv_getNextUCharFromToUImpl(pArgs, _UTF32ToUnicodeWithOffsets, FALSE, pErrorCode);
|
|
}
|
|
}
|
|
|
|
static const UConverterImpl _UTF32Impl = {
|
|
UCNV_UTF32,
|
|
|
|
NULL,
|
|
NULL,
|
|
|
|
_UTF32Open,
|
|
NULL,
|
|
_UTF32Reset,
|
|
|
|
_UTF32ToUnicodeWithOffsets,
|
|
_UTF32ToUnicodeWithOffsets,
|
|
#if U_IS_BIG_ENDIAN
|
|
T_UConverter_fromUnicode_UTF32_BE,
|
|
T_UConverter_fromUnicode_UTF32_BE_OFFSET_LOGIC,
|
|
#else
|
|
T_UConverter_fromUnicode_UTF32_LE,
|
|
T_UConverter_fromUnicode_UTF32_LE_OFFSET_LOGIC,
|
|
#endif
|
|
_UTF32GetNextUChar,
|
|
|
|
NULL, /* ### TODO implement getStarters for all Unicode encodings?! */
|
|
NULL,
|
|
NULL,
|
|
NULL
|
|
};
|
|
|
|
static const UConverterStaticData _UTF32StaticData = {
|
|
sizeof(UConverterStaticData),
|
|
"UTF-32",
|
|
1232, /* ### TODO review correctness of all Unicode CCSIDs */
|
|
UCNV_IBM, UCNV_UTF32, 4, 4,
|
|
#if U_IS_BIG_ENDIAN
|
|
{ 0, 0, 0xff, 0xfd }, 4,
|
|
#else
|
|
{ 0xfd, 0xff, 0, 0 }, 4,
|
|
#endif
|
|
FALSE, FALSE,
|
|
0,
|
|
0,
|
|
{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */
|
|
};
|
|
|
|
const UConverterSharedData _UTF32Data = {
|
|
sizeof(UConverterSharedData), ~((uint32_t) 0),
|
|
NULL, NULL, &_UTF32StaticData, FALSE, &_UTF32Impl,
|
|
0
|
|
};
|