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Unified Diff: icu46/source/common/ucnv_u32.c

Issue 5516007: Check in the pristine copy of ICU 4.6... (Closed) Base URL: svn://chrome-svn/chrome/trunk/deps/third_party/
Patch Set: Created 10 years ago
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Index: icu46/source/common/ucnv_u32.c
===================================================================
--- icu46/source/common/ucnv_u32.c (revision 0)
+++ icu46/source/common/ucnv_u32.c (revision 0)
@@ -0,0 +1,1248 @@
+/*
+**********************************************************************
+* Copyright (C) 2002-2009, International Business Machines
+* Corporation and others. All Rights Reserved.
+**********************************************************************
+* file name: ucnv_u32.c
+* encoding: US-ASCII
+* tab size: 8 (not used)
+* indentation:4
+*
+* created on: 2002jul01
+* created by: Markus W. Scherer
+*
+* UTF-32 converter implementation. Used to be in ucnv_utf.c.
+*/
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_CONVERSION
+
+#include "unicode/ucnv.h"
+#include "ucnv_bld.h"
+#include "ucnv_cnv.h"
+#include "cmemory.h"
+
+#define MAXIMUM_UCS2 0x0000FFFF
+#define MAXIMUM_UTF 0x0010FFFF
+#define HALF_SHIFT 10
+#define HALF_BASE 0x0010000
+#define HALF_MASK 0x3FF
+#define SURROGATE_HIGH_START 0xD800
+#define SURROGATE_LOW_START 0xDC00
+
+/* -SURROGATE_LOW_START + HALF_BASE */
+#define SURROGATE_LOW_BASE 9216
+
+enum {
+ UCNV_NEED_TO_WRITE_BOM=1
+};
+
+/* UTF-32BE ----------------------------------------------------------------- */
+
+static void
+T_UConverter_toUnicode_UTF32_BE(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;
+
+ /* Restore state of current sequence */
+ if (args->converter->toUnicodeStatus && myTarget < targetLimit) {
+ i = args->converter->toULength; /* restore # of bytes consumed */
+ args->converter->toULength = 0;
+
+ ch = args->converter->toUnicodeStatus - 1;/*Stores the previously calculated ch from a previous call*/
+ 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 = (ch << 8) | (uint8_t)(*mySource);
+ toUBytes[i++] = (char) *(mySource++);
+ }
+ 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 && !U_IS_SURROGATE(ch)) {
+ /* 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 */
+ *(myTarget++) = U16_LEAD(ch);
+ ch = U16_TRAIL(ch);
+ 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->converter->toULength = (int8_t)i;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ }
+
+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_BE_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;
+
+ /* Restore state of current sequence */
+ if (args->converter->toUnicodeStatus && myTarget < targetLimit) {
+ i = args->converter->toULength; /* restore # of bytes consumed */
+ args->converter->toULength = 0;
+
+ ch = args->converter->toUnicodeStatus - 1;/*Stores the previously calculated ch from a previous call*/
+ 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 = (ch << 8) | (uint8_t)(*mySource);
+ toUBytes[i++] = (char) *(mySource++);
+ }
+ 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 && !U_IS_SURROGATE(ch)) {
+ /* 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 */
+ *(myTarget++) = U16_LEAD(ch);
+ *myOffsets++ = offsetNum;
+ ch = U16_TRAIL(ch);
+ 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->converter->toULength = (int8_t)i;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ 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_BE(UConverterFromUnicodeArgs * args,
+ UErrorCode * err)
+{
+ const UChar *mySource = args->source;
+ unsigned char *myTarget;
+ 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)];
+
+ if(mySource >= sourceLimit) {
+ /* no input, nothing to do */
+ return;
+ }
+
+ /* write the BOM if necessary */
+ if(args->converter->fromUnicodeStatus==UCNV_NEED_TO_WRITE_BOM) {
+ static const char bom[]={ 0, 0, (char)0xfe, (char)0xff };
+ ucnv_fromUWriteBytes(args->converter,
+ bom, 4,
+ &args->target, args->targetLimit,
+ &args->offsets, -1,
+ err);
+ args->converter->fromUnicodeStatus=0;
+ }
+
+ myTarget = (unsigned char *) args->target;
+ temp[0] = 0;
+
+ if (args->converter->fromUChar32) {
+ ch = args->converter->fromUChar32;
+ args->converter->fromUChar32 = 0;
+ goto lowsurogate;
+ }
+
+ while (mySource < sourceLimit && myTarget < targetLimit) {
+ ch = *(mySource++);
+
+ if (UTF_IS_SURROGATE(ch)) {
+ if (U_IS_LEAD(ch)) {
+lowsurogate:
+ if (mySource < sourceLimit) {
+ ch2 = *mySource;
+ if (U_IS_TRAIL(ch2)) {
+ ch = ((ch - SURROGATE_HIGH_START) << HALF_SHIFT) + ch2 + SURROGATE_LOW_BASE;
+ mySource++;
+ }
+ else {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ args->converter->fromUChar32 = ch;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ }
+ else {
+ /* ran out of source */
+ args->converter->fromUChar32 = ch;
+ if (args->flush) {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ *err = U_ILLEGAL_CHAR_FOUND;
+ }
+ break;
+ }
+ }
+ else {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ args->converter->fromUChar32 = ch;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ }
+
+ /* We cannot get any larger than 10FFFF because we are coming from UTF-16 */
+ temp[1] = (uint8_t) (ch >> 16 & 0x1F);
+ temp[2] = (uint8_t) (ch >> 8); /* unsigned cast implicitly does (ch & FF) */
+ temp[3] = (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_BE_OFFSET_LOGIC(UConverterFromUnicodeArgs * args,
+ UErrorCode * err)
+{
+ const UChar *mySource = args->source;
+ unsigned char *myTarget;
+ int32_t *myOffsets;
+ const UChar *sourceLimit = args->sourceLimit;
+ const unsigned char *targetLimit = (unsigned char *) args->targetLimit;
+ UChar32 ch, ch2;
+ int32_t offsetNum = 0;
+ unsigned int indexToWrite;
+ unsigned char temp[sizeof(uint32_t)];
+
+ if(mySource >= sourceLimit) {
+ /* no input, nothing to do */
+ return;
+ }
+
+ /* write the BOM if necessary */
+ if(args->converter->fromUnicodeStatus==UCNV_NEED_TO_WRITE_BOM) {
+ static const char bom[]={ 0, 0, (char)0xfe, (char)0xff };
+ ucnv_fromUWriteBytes(args->converter,
+ bom, 4,
+ &args->target, args->targetLimit,
+ &args->offsets, -1,
+ err);
+ args->converter->fromUnicodeStatus=0;
+ }
+
+ myTarget = (unsigned char *) args->target;
+ myOffsets = args->offsets;
+ temp[0] = 0;
+
+ if (args->converter->fromUChar32) {
+ ch = args->converter->fromUChar32;
+ args->converter->fromUChar32 = 0;
+ goto lowsurogate;
+ }
+
+ while (mySource < sourceLimit && myTarget < targetLimit) {
+ ch = *(mySource++);
+
+ if (UTF_IS_SURROGATE(ch)) {
+ if (U_IS_LEAD(ch)) {
+lowsurogate:
+ if (mySource < sourceLimit) {
+ ch2 = *mySource;
+ if (U_IS_TRAIL(ch2)) {
+ ch = ((ch - SURROGATE_HIGH_START) << HALF_SHIFT) + ch2 + SURROGATE_LOW_BASE;
+ mySource++;
+ }
+ else {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ args->converter->fromUChar32 = ch;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ }
+ else {
+ /* ran out of source */
+ args->converter->fromUChar32 = ch;
+ if (args->flush) {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ *err = U_ILLEGAL_CHAR_FOUND;
+ }
+ break;
+ }
+ }
+ else {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ args->converter->fromUChar32 = ch;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ }
+
+ /* We cannot get any larger than 10FFFF because we are coming from UTF-16 */
+ temp[1] = (uint8_t) (ch >> 16 & 0x1F);
+ temp[2] = (uint8_t) (ch >> 8); /* unsigned cast implicitly does (ch & FF) */
+ temp[3] = (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 = offsetNum + 1 + (temp[1] != 0);
+ }
+
+ 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_BE(UConverterToUnicodeArgs* args,
+ UErrorCode* err)
+{
+ const uint8_t *mySource;
+ UChar32 myUChar;
+ int32_t length;
+
+ mySource = (const uint8_t *)args->source;
+ if (mySource >= (const uint8_t *)args->sourceLimit)
+ {
+ /* no input */
+ *err = U_INDEX_OUTOFBOUNDS_ERROR;
+ return 0xffff;
+ }
+
+ length = (int32_t)((const uint8_t *)args->sourceLimit - mySource);
+ if (length < 4)
+ {
+ /* got a partial character */
+ uprv_memcpy(args->converter->toUBytes, mySource, length);
+ args->converter->toULength = (int8_t)length;
+ args->source = (const char *)(mySource + length);
+ *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. */
+ myUChar = ((UChar32)mySource[0] << 24)
+ | ((UChar32)mySource[1] << 16)
+ | ((UChar32)mySource[2] << 8)
+ | ((UChar32)mySource[3]);
+
+ args->source = (const char *)(mySource + 4);
+ if ((uint32_t)myUChar <= MAXIMUM_UTF && !U_IS_SURROGATE(myUChar)) {
+ return myUChar;
+ }
+
+ uprv_memcpy(args->converter->toUBytes, mySource, 4);
+ args->converter->toULength = 4;
+
+ *err = U_ILLEGAL_CHAR_FOUND;
+ 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,
+ NULL,
+ NULL,
+ ucnv_getNonSurrogateUnicodeSet
+};
+
+/* 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;
+
+ /* Restore state of current sequence */
+ if (args->converter->toUnicodeStatus && myTarget < targetLimit)
+ {
+ i = args->converter->toULength; /* restore # of bytes consumed */
+ args->converter->toULength = 0;
+
+ /* 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
+ {
+ /* 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 && !U_IS_SURROGATE(ch)) {
+ /* 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 */
+ *(myTarget++) = U16_LEAD(ch);
+ ch = U16_TRAIL(ch);
+ 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->converter->toULength = (int8_t)i;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ }
+
+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;
+
+ /* Restore state of current sequence */
+ if (args->converter->toUnicodeStatus && myTarget < targetLimit)
+ {
+ i = args->converter->toULength; /* restore # of bytes consumed */
+ args->converter->toULength = 0;
+
+ /* 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
+ {
+ /* 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 && !U_IS_SURROGATE(ch))
+ {
+ /* 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 */
+ *(myTarget++) = U16_LEAD(ch);
+ *(myOffsets++) = offsetNum;
+ ch = U16_TRAIL(ch);
+ 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->converter->toULength = (int8_t)i;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ 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;
+ 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)];
+
+ if(mySource >= sourceLimit) {
+ /* no input, nothing to do */
+ return;
+ }
+
+ /* write the BOM if necessary */
+ if(args->converter->fromUnicodeStatus==UCNV_NEED_TO_WRITE_BOM) {
+ static const char bom[]={ (char)0xff, (char)0xfe, 0, 0 };
+ ucnv_fromUWriteBytes(args->converter,
+ bom, 4,
+ &args->target, args->targetLimit,
+ &args->offsets, -1,
+ err);
+ args->converter->fromUnicodeStatus=0;
+ }
+
+ myTarget = (unsigned char *) args->target;
+ temp[3] = 0;
+
+ if (args->converter->fromUChar32)
+ {
+ ch = args->converter->fromUChar32;
+ args->converter->fromUChar32 = 0;
+ goto lowsurogate;
+ }
+
+ while (mySource < sourceLimit && myTarget < targetLimit)
+ {
+ ch = *(mySource++);
+
+ if (UTF_IS_SURROGATE(ch)) {
+ if (U_IS_LEAD(ch))
+ {
+lowsurogate:
+ if (mySource < sourceLimit)
+ {
+ ch2 = *mySource;
+ if (U_IS_TRAIL(ch2)) {
+ ch = ((ch - SURROGATE_HIGH_START) << HALF_SHIFT) + ch2 + SURROGATE_LOW_BASE;
+ mySource++;
+ }
+ else {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ args->converter->fromUChar32 = ch;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ }
+ else {
+ /* ran out of source */
+ args->converter->fromUChar32 = ch;
+ if (args->flush) {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ *err = U_ILLEGAL_CHAR_FOUND;
+ }
+ break;
+ }
+ }
+ else {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ args->converter->fromUChar32 = ch;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ 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;
+ int32_t *myOffsets;
+ 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;
+
+ if(mySource >= sourceLimit) {
+ /* no input, nothing to do */
+ return;
+ }
+
+ /* write the BOM if necessary */
+ if(args->converter->fromUnicodeStatus==UCNV_NEED_TO_WRITE_BOM) {
+ static const char bom[]={ (char)0xff, (char)0xfe, 0, 0 };
+ ucnv_fromUWriteBytes(args->converter,
+ bom, 4,
+ &args->target, args->targetLimit,
+ &args->offsets, -1,
+ err);
+ args->converter->fromUnicodeStatus=0;
+ }
+
+ myTarget = (unsigned char *) args->target;
+ myOffsets = args->offsets;
+ temp[3] = 0;
+
+ if (args->converter->fromUChar32)
+ {
+ ch = args->converter->fromUChar32;
+ args->converter->fromUChar32 = 0;
+ goto lowsurogate;
+ }
+
+ while (mySource < sourceLimit && myTarget < targetLimit)
+ {
+ ch = *(mySource++);
+
+ if (UTF_IS_SURROGATE(ch)) {
+ if (U_IS_LEAD(ch))
+ {
+lowsurogate:
+ if (mySource < sourceLimit)
+ {
+ ch2 = *mySource;
+ if (U_IS_TRAIL(ch2))
+ {
+ ch = ((ch - SURROGATE_HIGH_START) << HALF_SHIFT) + ch2 + SURROGATE_LOW_BASE;
+ mySource++;
+ }
+ else {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ args->converter->fromUChar32 = ch;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ break;
+ }
+ }
+ else {
+ /* ran out of source */
+ args->converter->fromUChar32 = ch;
+ if (args->flush) {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ *err = U_ILLEGAL_CHAR_FOUND;
+ }
+ break;
+ }
+ }
+ else {
+ /* this is an unmatched trail code unit (2nd surrogate) */
+ /* callback(illegal) */
+ args->converter->fromUChar32 = ch;
+ *err = U_ILLEGAL_CHAR_FOUND;
+ 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 = offsetNum + 1 + (temp[2] != 0);
+ }
+
+ 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)
+{
+ const uint8_t *mySource;
+ UChar32 myUChar;
+ int32_t length;
+
+ mySource = (const uint8_t *)args->source;
+ if (mySource >= (const uint8_t *)args->sourceLimit)
+ {
+ /* no input */
+ *err = U_INDEX_OUTOFBOUNDS_ERROR;
+ return 0xffff;
+ }
+
+ length = (int32_t)((const uint8_t *)args->sourceLimit - mySource);
+ if (length < 4)
+ {
+ /* got a partial character */
+ uprv_memcpy(args->converter->toUBytes, mySource, length);
+ args->converter->toULength = (int8_t)length;
+ args->source = (const char *)(mySource + length);
+ *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. */
+ myUChar = ((UChar32)mySource[3] << 24)
+ | ((UChar32)mySource[2] << 16)
+ | ((UChar32)mySource[1] << 8)
+ | ((UChar32)mySource[0]);
+
+ args->source = (const char *)(mySource + 4);
+ if ((uint32_t)myUChar <= MAXIMUM_UTF && !U_IS_SURROGATE(myUChar)) {
+ return myUChar;
+ }
+
+ uprv_memcpy(args->converter->toUBytes, mySource, 4);
+ args->converter->toULength = 4;
+
+ *err = U_ILLEGAL_CHAR_FOUND;
+ 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,
+ NULL,
+ NULL,
+ ucnv_getNonSurrogateUnicodeSet
+};
+
+/* The 1232 CCSID refers to any version of Unicode with any endianess of UTF-32 */
+static const UConverterStaticData _UTF32LEStaticData = {
+ sizeof(UConverterStaticData),
+ "UTF-32LE",
+ 1234,
+ 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->fromUnicodeStatus=UCNV_NEED_TO_WRITE_BOM;
+ }
+}
+
+static void
+_UTF32Open(UConverter *cnv,
+ UConverterLoadArgs *pArgs,
+ 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=(int32_t)(source-pArgs->source);
+ } else if(state==8) {
+ state=9; /* detect UTF-32LE */
+ offsetDelta=(int32_t)(source-pArgs->source);
+ }
+ } else {
+ /* switch to UTF-32BE and pass the previous bytes */
+ int32_t count=(int32_t)(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;
+ }
+ }
+
+ pArgs->source=source;
+
+ 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=source;
+ pArgs->sourceLimit=sourceLimit;
+ state=8;
+ break;
+ }
+ }
+
+ cnv->mode=state;
+}
+
+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_GET_NEXT_UCHAR_USE_TO_U;
+ }
+}
+
+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,
+ ucnv_getNonSurrogateUnicodeSet
+};
+
+/* The 1236 CCSID refers to any version of Unicode with a BOM sensitive endianess of UTF-32 */
+static const UConverterStaticData _UTF32StaticData = {
+ sizeof(UConverterStaticData),
+ "UTF-32",
+ 1236,
+ 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
+};
+
+#endif
Property changes on: icu46/source/common/ucnv_u32.c
___________________________________________________________________
Added: svn:eol-style
+ LF
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