| /* |
| ********************************************************************** |
| * Copyright (C) 2002-2006, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| ********************************************************************** |
| * file name: ucnv_u8.c |
| * encoding: US-ASCII |
| * tab size: 8 (not used) |
| * indentation:4 |
| * |
| * created on: 2002jul01 |
| * created by: Markus W. Scherer |
| * |
| * UTF-8 converter implementation. Used to be in ucnv_utf.c. |
| * |
| * Also, CESU-8 implementation, see UTR 26. |
| * The CESU-8 converter uses all the same functions as the |
| * UTF-8 converter, with a branch for converting supplementary code points. |
| */ |
| |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_CONVERSION |
| |
| #include "unicode/ucnv.h" |
| #include "ucnv_bld.h" |
| #include "ucnv_cnv.h" |
| #include "cmemory.h" |
| |
| /* Prototypes --------------------------------------------------------------- */ |
| |
| /* Keep these here to make finicky compilers happy */ |
| |
| U_CFUNC void ucnv_fromUnicode_UTF8(UConverterFromUnicodeArgs *args, |
| UErrorCode *err); |
| U_CFUNC void ucnv_fromUnicode_UTF8_OFFSETS_LOGIC(UConverterFromUnicodeArgs *args, |
| UErrorCode *err); |
| |
| |
| /* UTF-8 -------------------------------------------------------------------- */ |
| |
| /* UTF-8 Conversion DATA |
| * for more information see Unicode Strandard 2.0 , Transformation Formats Appendix A-9 |
| */ |
| /*static const uint32_t REPLACEMENT_CHARACTER = 0x0000FFFD;*/ |
| #define MAXIMUM_UCS2 0x0000FFFF |
| #define MAXIMUM_UTF 0x0010FFFF |
| #define MAXIMUM_UCS4 0x7FFFFFFF |
| #define HALF_SHIFT 10 |
| #define HALF_BASE 0x0010000 |
| #define HALF_MASK 0x3FF |
| #define SURROGATE_HIGH_START 0xD800 |
| #define SURROGATE_HIGH_END 0xDBFF |
| #define SURROGATE_LOW_START 0xDC00 |
| #define SURROGATE_LOW_END 0xDFFF |
| |
| /* -SURROGATE_LOW_START + HALF_BASE */ |
| #define SURROGATE_LOW_BASE 9216 |
| |
| static const uint32_t offsetsFromUTF8[7] = {0, |
| (uint32_t) 0x00000000, (uint32_t) 0x00003080, (uint32_t) 0x000E2080, |
| (uint32_t) 0x03C82080, (uint32_t) 0xFA082080, (uint32_t) 0x82082080 |
| }; |
| |
| /* END OF UTF-8 Conversion DATA */ |
| |
| static const int8_t bytesFromUTF8[256] = { |
| 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, |
| 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 0, 0 |
| }; |
| |
| /* |
| * Starting with Unicode 3.0.1: |
| * UTF-8 byte sequences of length N _must_ encode code points of or above utf8_minChar32[N]; |
| * byte sequences with more than 4 bytes are illegal in UTF-8, |
| * which is tested with impossible values for them |
| */ |
| static const uint32_t |
| utf8_minChar32[7]={ 0, 0, 0x80, 0x800, 0x10000, 0xffffffff, 0xffffffff }; |
| |
| static void ucnv_toUnicode_UTF8 (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; |
| UBool isCESU8 = (UBool)(args->converter->sharedData == &_CESU8Data); |
| uint32_t ch, ch2 = 0; |
| int32_t i, inBytes; |
| |
| /* Restore size of current sequence */ |
| if (args->converter->toUnicodeStatus && myTarget < targetLimit) |
| { |
| inBytes = args->converter->mode; /* restore # of bytes to consume */ |
| i = args->converter->toULength; /* restore # of bytes consumed */ |
| args->converter->toULength = 0; |
| |
| ch = args->converter->toUnicodeStatus;/*Stores the previously calculated ch from a previous call*/ |
| args->converter->toUnicodeStatus = 0; |
| goto morebytes; |
| } |
| |
| |
| while (mySource < sourceLimit && myTarget < targetLimit) |
| { |
| ch = *(mySource++); |
| if (ch < 0x80) /* Simple case */ |
| { |
| *(myTarget++) = (UChar) ch; |
| } |
| else |
| { |
| /* store the first char */ |
| toUBytes[0] = (char)ch; |
| inBytes = bytesFromUTF8[ch]; /* lookup current sequence length */ |
| i = 1; |
| |
| morebytes: |
| while (i < inBytes) |
| { |
| if (mySource < sourceLimit) |
| { |
| toUBytes[i] = (char) (ch2 = *mySource); |
| if (!UTF8_IS_TRAIL(ch2)) |
| { |
| break; /* i < inBytes */ |
| } |
| ch = (ch << 6) + ch2; |
| ++mySource; |
| i++; |
| } |
| else |
| { |
| /* stores a partially calculated target*/ |
| args->converter->toUnicodeStatus = ch; |
| args->converter->mode = inBytes; |
| args->converter->toULength = (int8_t) i; |
| goto donefornow; |
| } |
| } |
| |
| /* Remove the accumulated high bits */ |
| ch -= offsetsFromUTF8[inBytes]; |
| |
| /* |
| * Legal UTF-8 byte sequences in Unicode 3.0.1 and up: |
| * - use only trail bytes after a lead byte (checked above) |
| * - use the right number of trail bytes for a given lead byte |
| * - encode a code point <= U+10ffff |
| * - use the fewest possible number of bytes for their code points |
| * - use at most 4 bytes (for i>=5 it is 0x10ffff<utf8_minChar32[]) |
| * |
| * Starting with Unicode 3.2, surrogate code points must not be encoded in UTF-8. |
| * There are no irregular sequences any more. |
| * In CESU-8, only surrogates, not supplementary code points, are encoded directly. |
| */ |
| if (i == inBytes && ch <= MAXIMUM_UTF && ch >= utf8_minChar32[i] && |
| (isCESU8 ? i <= 3 : !UTF_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 */ |
| 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->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 ucnv_toUnicode_UTF8_OFFSETS_LOGIC (UConverterToUnicodeArgs * args, |
| UErrorCode * err) |
| { |
| const unsigned char *mySource = (unsigned char *) args->source; |
| UChar *myTarget = args->target; |
| int32_t *myOffsets = args->offsets; |
| int32_t offsetNum = 0; |
| const unsigned char *sourceLimit = (unsigned char *) args->sourceLimit; |
| const UChar *targetLimit = args->targetLimit; |
| unsigned char *toUBytes = args->converter->toUBytes; |
| UBool isCESU8 = (UBool)(args->converter->sharedData == &_CESU8Data); |
| uint32_t ch, ch2 = 0; |
| int32_t i, inBytes; |
| |
| /* Restore size of current sequence */ |
| if (args->converter->toUnicodeStatus && myTarget < targetLimit) |
| { |
| inBytes = args->converter->mode; /* restore # of bytes to consume */ |
| i = args->converter->toULength; /* restore # of bytes consumed */ |
| args->converter->toULength = 0; |
| |
| ch = args->converter->toUnicodeStatus;/*Stores the previously calculated ch from a previous call*/ |
| args->converter->toUnicodeStatus = 0; |
| goto morebytes; |
| } |
| |
| while (mySource < sourceLimit && myTarget < targetLimit) |
| { |
| ch = *(mySource++); |
| if (ch < 0x80) /* Simple case */ |
| { |
| *(myTarget++) = (UChar) ch; |
| *(myOffsets++) = offsetNum++; |
| } |
| else |
| { |
| toUBytes[0] = (char)ch; |
| inBytes = bytesFromUTF8[ch]; |
| i = 1; |
| |
| morebytes: |
| while (i < inBytes) |
| { |
| if (mySource < sourceLimit) |
| { |
| toUBytes[i] = (char) (ch2 = *mySource); |
| if (!UTF8_IS_TRAIL(ch2)) |
| { |
| break; /* i < inBytes */ |
| } |
| ch = (ch << 6) + ch2; |
| ++mySource; |
| i++; |
| } |
| else |
| { |
| args->converter->toUnicodeStatus = ch; |
| args->converter->mode = inBytes; |
| args->converter->toULength = (int8_t)i; |
| goto donefornow; |
| } |
| } |
| |
| /* Remove the accumulated high bits */ |
| ch -= offsetsFromUTF8[inBytes]; |
| |
| /* |
| * Legal UTF-8 byte sequences in Unicode 3.0.1 and up: |
| * - use only trail bytes after a lead byte (checked above) |
| * - use the right number of trail bytes for a given lead byte |
| * - encode a code point <= U+10ffff |
| * - use the fewest possible number of bytes for their code points |
| * - use at most 4 bytes (for i>=5 it is 0x10ffff<utf8_minChar32[]) |
| * |
| * Starting with Unicode 3.2, surrogate code points must not be encoded in UTF-8. |
| * There are no irregular sequences any more. |
| * In CESU-8, only surrogates, not supplementary code points, are encoded directly. |
| */ |
| if (i == inBytes && ch <= MAXIMUM_UTF && ch >= utf8_minChar32[i] && |
| (isCESU8 ? i <= 3 : !UTF_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 */ |
| 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 |
| { |
| args->converter->UCharErrorBuffer[0] = (UChar) ch; |
| args->converter->UCharErrorBufferLength = 1; |
| *err = U_BUFFER_OVERFLOW_ERROR; |
| } |
| } |
| offsetNum += i; |
| } |
| 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; |
| args->offsets = myOffsets; |
| } |
| |
| U_CFUNC void ucnv_fromUnicode_UTF8 (UConverterFromUnicodeArgs * args, |
| UErrorCode * err) |
| { |
| UConverter *cnv = args->converter; |
| 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; |
| UBool isCESU8 = (UBool)(args->converter->sharedData == &_CESU8Data); |
| UChar32 ch; |
| int16_t indexToWrite; |
| char temp[4]; |
| |
| if (cnv->fromUChar32 && myTarget < targetLimit) |
| { |
| ch = cnv->fromUChar32; |
| cnv->fromUChar32 = 0; |
| goto lowsurrogate; |
| } |
| |
| while (mySource < sourceLimit && myTarget < targetLimit) |
| { |
| ch = *(mySource++); |
| |
| if (ch < 0x80) /* Single byte */ |
| { |
| *(myTarget++) = (char) ch; |
| } |
| else if (ch < 0x800) /* Double byte */ |
| { |
| *(myTarget++) = (char) ((ch >> 6) | 0xc0); |
| if (myTarget < targetLimit) |
| { |
| *(myTarget++) = (char) ((ch & 0x3f) | 0x80); |
| } |
| else |
| { |
| cnv->charErrorBuffer[0] = (char) ((ch & 0x3f) | 0x80); |
| cnv->charErrorBufferLength = 1; |
| *err = U_BUFFER_OVERFLOW_ERROR; |
| } |
| } |
| else |
| /* Check for surrogates */ |
| { |
| if(UTF_IS_SURROGATE(ch) && !isCESU8) { |
| if(UTF_IS_SURROGATE_FIRST(ch)) { |
| lowsurrogate: |
| if (mySource < sourceLimit) { |
| /* test the following code unit */ |
| UChar trail=*mySource; |
| if(UTF_IS_SECOND_SURROGATE(trail)) { |
| ++mySource; |
| ch=UTF16_GET_PAIR_VALUE(ch, trail); |
| /* convert this supplementary code point */ |
| /* exit this condition tree */ |
| } else { |
| /* this is an unmatched lead code unit (1st surrogate) */ |
| /* callback(illegal) */ |
| cnv->fromUChar32 = ch; |
| *err = U_ILLEGAL_CHAR_FOUND; |
| break; |
| } |
| } else { |
| /* no more input */ |
| cnv->fromUChar32 = ch; |
| break; |
| } |
| } else { |
| /* this is an unmatched trail code unit (2nd surrogate) */ |
| /* callback(illegal) */ |
| cnv->fromUChar32 = ch; |
| *err = U_ILLEGAL_CHAR_FOUND; |
| break; |
| } |
| } |
| |
| if (ch < 0x10000) |
| { |
| indexToWrite = 2; |
| temp[2] = (char) ((ch >> 12) | 0xe0); |
| } |
| else |
| { |
| indexToWrite = 3; |
| temp[3] = (char) ((ch >> 18) | 0xf0); |
| temp[2] = (char) (((ch >> 12) & 0x3f) | 0x80); |
| } |
| temp[1] = (char) (((ch >> 6) & 0x3f) | 0x80); |
| temp[0] = (char) ((ch & 0x3f) | 0x80); |
| |
| for (; indexToWrite >= 0; indexToWrite--) |
| { |
| if (myTarget < targetLimit) |
| { |
| *(myTarget++) = temp[indexToWrite]; |
| } |
| else |
| { |
| cnv->charErrorBuffer[cnv->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; |
| } |
| |
| U_CFUNC void ucnv_fromUnicode_UTF8_OFFSETS_LOGIC (UConverterFromUnicodeArgs * args, |
| UErrorCode * err) |
| { |
| UConverter *cnv = args->converter; |
| 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; |
| UBool isCESU8 = (UBool)(args->converter->sharedData == &_CESU8Data); |
| UChar32 ch; |
| int32_t offsetNum, nextSourceIndex; |
| int16_t indexToWrite; |
| char temp[4]; |
| |
| if (cnv->fromUChar32 && myTarget < targetLimit) |
| { |
| ch = cnv->fromUChar32; |
| cnv->fromUChar32 = 0; |
| offsetNum = -1; |
| nextSourceIndex = 0; |
| goto lowsurrogate; |
| } else { |
| offsetNum = 0; |
| } |
| |
| while (mySource < sourceLimit && myTarget < targetLimit) |
| { |
| ch = *(mySource++); |
| |
| if (ch < 0x80) /* Single byte */ |
| { |
| *(myOffsets++) = offsetNum++; |
| *(myTarget++) = (char) ch; |
| } |
| else if (ch < 0x800) /* Double byte */ |
| { |
| *(myOffsets++) = offsetNum; |
| *(myTarget++) = (char) ((ch >> 6) | 0xc0); |
| if (myTarget < targetLimit) |
| { |
| *(myOffsets++) = offsetNum++; |
| *(myTarget++) = (char) ((ch & 0x3f) | 0x80); |
| } |
| else |
| { |
| cnv->charErrorBuffer[0] = (char) ((ch & 0x3f) | 0x80); |
| cnv->charErrorBufferLength = 1; |
| *err = U_BUFFER_OVERFLOW_ERROR; |
| } |
| } |
| else |
| /* Check for surrogates */ |
| { |
| nextSourceIndex = offsetNum + 1; |
| |
| if(UTF_IS_SURROGATE(ch) && !isCESU8) { |
| if(UTF_IS_SURROGATE_FIRST(ch)) { |
| lowsurrogate: |
| if (mySource < sourceLimit) { |
| /* test the following code unit */ |
| UChar trail=*mySource; |
| if(UTF_IS_SECOND_SURROGATE(trail)) { |
| ++mySource; |
| ++nextSourceIndex; |
| ch=UTF16_GET_PAIR_VALUE(ch, trail); |
| /* convert this supplementary code point */ |
| /* exit this condition tree */ |
| } else { |
| /* this is an unmatched lead code unit (1st surrogate) */ |
| /* callback(illegal) */ |
| cnv->fromUChar32 = ch; |
| *err = U_ILLEGAL_CHAR_FOUND; |
| break; |
| } |
| } else { |
| /* no more input */ |
| cnv->fromUChar32 = ch; |
| break; |
| } |
| } else { |
| /* this is an unmatched trail code unit (2nd surrogate) */ |
| /* callback(illegal) */ |
| cnv->fromUChar32 = ch; |
| *err = U_ILLEGAL_CHAR_FOUND; |
| break; |
| } |
| } |
| |
| if (ch < 0x10000) |
| { |
| indexToWrite = 2; |
| temp[2] = (char) ((ch >> 12) | 0xe0); |
| } |
| else |
| { |
| indexToWrite = 3; |
| temp[3] = (char) ((ch >> 18) | 0xf0); |
| temp[2] = (char) (((ch >> 12) & 0x3f) | 0x80); |
| } |
| temp[1] = (char) (((ch >> 6) & 0x3f) | 0x80); |
| temp[0] = (char) ((ch & 0x3f) | 0x80); |
| |
| for (; indexToWrite >= 0; indexToWrite--) |
| { |
| if (myTarget < targetLimit) |
| { |
| *(myOffsets++) = offsetNum; |
| *(myTarget++) = temp[indexToWrite]; |
| } |
| else |
| { |
| cnv->charErrorBuffer[cnv->charErrorBufferLength++] = temp[indexToWrite]; |
| *err = U_BUFFER_OVERFLOW_ERROR; |
| } |
| } |
| offsetNum = nextSourceIndex; |
| } |
| } |
| |
| 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 ucnv_getNextUChar_UTF8(UConverterToUnicodeArgs *args, |
| UErrorCode *err) { |
| UConverter *cnv; |
| const uint8_t *sourceInitial; |
| const uint8_t *source; |
| uint16_t extraBytesToWrite; |
| uint8_t myByte; |
| UChar32 ch; |
| int8_t i, isLegalSequence; |
| |
| /* UTF-8 only here, the framework handles CESU-8 to combine surrogate pairs */ |
| |
| cnv = args->converter; |
| sourceInitial = source = (const uint8_t *)args->source; |
| if (source >= (const uint8_t *)args->sourceLimit) |
| { |
| /* no input */ |
| *err = U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0xffff; |
| } |
| |
| myByte = (uint8_t)*(source++); |
| if (myByte < 0x80) |
| { |
| args->source = (const char *)source; |
| return (UChar32)myByte; |
| } |
| |
| extraBytesToWrite = (uint16_t)bytesFromUTF8[myByte]; |
| if (extraBytesToWrite == 0) { |
| cnv->toUBytes[0] = myByte; |
| cnv->toULength = 1; |
| *err = U_ILLEGAL_CHAR_FOUND; |
| args->source = (const char *)source; |
| return 0xffff; |
| } |
| |
| /*The byte sequence is longer than the buffer area passed*/ |
| if (((const char *)source + extraBytesToWrite - 1) > args->sourceLimit) |
| { |
| /* check if all of the remaining bytes are trail bytes */ |
| cnv->toUBytes[0] = myByte; |
| i = 1; |
| *err = U_TRUNCATED_CHAR_FOUND; |
| while(source < (const uint8_t *)args->sourceLimit) { |
| if(U8_IS_TRAIL(myByte = *source)) { |
| cnv->toUBytes[i++] = myByte; |
| ++source; |
| } else { |
| /* error even before we run out of input */ |
| *err = U_ILLEGAL_CHAR_FOUND; |
| break; |
| } |
| } |
| cnv->toULength = i; |
| args->source = (const char *)source; |
| return 0xffff; |
| } |
| |
| isLegalSequence = 1; |
| ch = myByte << 6; |
| switch(extraBytesToWrite) |
| { |
| /* note: code falls through cases! (sic)*/ |
| case 6: |
| ch += (myByte = *source); |
| ch <<= 6; |
| if (!UTF8_IS_TRAIL(myByte)) |
| { |
| isLegalSequence = 0; |
| break; |
| } |
| ++source; |
| case 5: |
| ch += (myByte = *source); |
| ch <<= 6; |
| if (!UTF8_IS_TRAIL(myByte)) |
| { |
| isLegalSequence = 0; |
| break; |
| } |
| ++source; |
| case 4: |
| ch += (myByte = *source); |
| ch <<= 6; |
| if (!UTF8_IS_TRAIL(myByte)) |
| { |
| isLegalSequence = 0; |
| break; |
| } |
| ++source; |
| case 3: |
| ch += (myByte = *source); |
| ch <<= 6; |
| if (!UTF8_IS_TRAIL(myByte)) |
| { |
| isLegalSequence = 0; |
| break; |
| } |
| ++source; |
| case 2: |
| ch += (myByte = *source); |
| if (!UTF8_IS_TRAIL(myByte)) |
| { |
| isLegalSequence = 0; |
| break; |
| } |
| ++source; |
| }; |
| ch -= offsetsFromUTF8[extraBytesToWrite]; |
| args->source = (const char *)source; |
| |
| /* |
| * Legal UTF-8 byte sequences in Unicode 3.0.1 and up: |
| * - use only trail bytes after a lead byte (checked above) |
| * - use the right number of trail bytes for a given lead byte |
| * - encode a code point <= U+10ffff |
| * - use the fewest possible number of bytes for their code points |
| * - use at most 4 bytes (for i>=5 it is 0x10ffff<utf8_minChar32[]) |
| * |
| * Starting with Unicode 3.2, surrogate code points must not be encoded in UTF-8. |
| * There are no irregular sequences any more. |
| */ |
| if (isLegalSequence && |
| (uint32_t)ch <= MAXIMUM_UTF && |
| (uint32_t)ch >= utf8_minChar32[extraBytesToWrite] && |
| !U_IS_SURROGATE(ch) |
| ) { |
| return ch; /* return the code point */ |
| } |
| |
| for(i = 0; sourceInitial < source; ++i) { |
| cnv->toUBytes[i] = *sourceInitial++; |
| } |
| cnv->toULength = i; |
| *err = U_ILLEGAL_CHAR_FOUND; |
| return 0xffff; |
| } |
| |
| /* UTF-8 converter data ----------------------------------------------------- */ |
| |
| static const UConverterImpl _UTF8Impl={ |
| UCNV_UTF8, |
| |
| NULL, |
| NULL, |
| |
| NULL, |
| NULL, |
| NULL, |
| |
| ucnv_toUnicode_UTF8, |
| ucnv_toUnicode_UTF8_OFFSETS_LOGIC, |
| ucnv_fromUnicode_UTF8, |
| ucnv_fromUnicode_UTF8_OFFSETS_LOGIC, |
| ucnv_getNextUChar_UTF8, |
| |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| ucnv_getNonSurrogateUnicodeSet |
| }; |
| |
| /* The 1208 CCSID refers to any version of Unicode of UTF-8 */ |
| static const UConverterStaticData _UTF8StaticData={ |
| sizeof(UConverterStaticData), |
| "UTF-8", |
| 1208, UCNV_IBM, UCNV_UTF8, |
| 1, 3, /* max 3 bytes per UChar from UTF-8 (4 bytes from surrogate _pair_) */ |
| { 0xef, 0xbf, 0xbd, 0 },3,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 _UTF8Data={ |
| sizeof(UConverterSharedData), ~((uint32_t) 0), |
| NULL, NULL, &_UTF8StaticData, FALSE, &_UTF8Impl, |
| 0 |
| }; |
| |
| /* CESU-8 converter data ---------------------------------------------------- */ |
| |
| static const UConverterImpl _CESU8Impl={ |
| UCNV_CESU8, |
| |
| NULL, |
| NULL, |
| |
| NULL, |
| NULL, |
| NULL, |
| |
| ucnv_toUnicode_UTF8, |
| ucnv_toUnicode_UTF8_OFFSETS_LOGIC, |
| ucnv_fromUnicode_UTF8, |
| ucnv_fromUnicode_UTF8_OFFSETS_LOGIC, |
| NULL, |
| |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| ucnv_getCompleteUnicodeSet |
| }; |
| |
| static const UConverterStaticData _CESU8StaticData={ |
| sizeof(UConverterStaticData), |
| "CESU-8", |
| 9400, /* CCSID for CESU-8 */ |
| UCNV_UNKNOWN, UCNV_CESU8, 1, 3, |
| { 0xef, 0xbf, 0xbd, 0 },3,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 _CESU8Data={ |
| sizeof(UConverterSharedData), ~((uint32_t) 0), |
| NULL, NULL, &_CESU8StaticData, FALSE, &_CESU8Impl, |
| 0 |
| }; |
| |
| #endif |