| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| #include "converteuctw.h" |
| #include "context.h" |
| #include "converter.h" |
| #include "tenchelp.h" |
| #include "unichars.h" |
| #include "rtl/alloc.h" |
| #include "rtl/textcvt.h" |
| #include "sal/types.h" |
| |
| typedef enum |
| { |
| IMPL_EUC_TW_TO_UNICODE_STATE_0, |
| IMPL_EUC_TW_TO_UNICODE_STATE_1, |
| IMPL_EUC_TW_TO_UNICODE_STATE_2_1, |
| IMPL_EUC_TW_TO_UNICODE_STATE_2_2, |
| IMPL_EUC_TW_TO_UNICODE_STATE_2_3 |
| } ImplEucTwToUnicodeState; |
| |
| typedef struct |
| { |
| ImplEucTwToUnicodeState m_eState; |
| sal_Int32 m_nPlane; /* 0--15 */ |
| sal_Int32 m_nRow; /* 0--93 */ |
| } ImplEucTwToUnicodeContext; |
| |
| void * ImplCreateEucTwToUnicodeContext(void) |
| { |
| void * pContext = rtl_allocateMemory(sizeof (ImplEucTwToUnicodeContext)); |
| ((ImplEucTwToUnicodeContext *) pContext)->m_eState |
| = IMPL_EUC_TW_TO_UNICODE_STATE_0; |
| return pContext; |
| } |
| |
| void ImplResetEucTwToUnicodeContext(void * pContext) |
| { |
| if (pContext) |
| ((ImplEucTwToUnicodeContext *) pContext)->m_eState |
| = IMPL_EUC_TW_TO_UNICODE_STATE_0; |
| } |
| |
| sal_Size ImplConvertEucTwToUnicode(ImplTextConverterData const * pData, |
| void * pContext, |
| sal_Char const * pSrcBuf, |
| sal_Size nSrcBytes, |
| sal_Unicode * pDestBuf, |
| sal_Size nDestChars, |
| sal_uInt32 nFlags, |
| sal_uInt32 * pInfo, |
| sal_Size * pSrcCvtBytes) |
| { |
| sal_uInt16 const * pCns116431992Data |
| = ((ImplEucTwConverterData const *) pData)-> |
| m_pCns116431992ToUnicodeData; |
| sal_Int32 const * pCns116431992RowOffsets |
| = ((ImplEucTwConverterData const *) pData)-> |
| m_pCns116431992ToUnicodeRowOffsets; |
| sal_Int32 const * pCns116431992PlaneOffsets |
| = ((ImplEucTwConverterData const *) pData)-> |
| m_pCns116431992ToUnicodePlaneOffsets; |
| ImplEucTwToUnicodeState eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; |
| sal_Int32 nPlane = 0; |
| sal_Int32 nRow = 0; |
| sal_uInt32 nInfo = 0; |
| sal_Size nConverted = 0; |
| sal_Unicode * pDestBufPtr = pDestBuf; |
| sal_Unicode * pDestBufEnd = pDestBuf + nDestChars; |
| |
| if (pContext) |
| { |
| eState = ((ImplEucTwToUnicodeContext *) pContext)->m_eState; |
| nPlane = ((ImplEucTwToUnicodeContext *) pContext)->m_nPlane; |
| nRow = ((ImplEucTwToUnicodeContext *) pContext)->m_nRow; |
| } |
| |
| for (; nConverted < nSrcBytes; ++nConverted) |
| { |
| sal_Bool bUndefined = sal_True; |
| sal_uInt32 nChar = *(sal_uChar const *) pSrcBuf++; |
| switch (eState) |
| { |
| case IMPL_EUC_TW_TO_UNICODE_STATE_0: |
| if (nChar < 0x80) |
| if (pDestBufPtr != pDestBufEnd) |
| *pDestBufPtr++ = (sal_Unicode) nChar; |
| else |
| goto no_output; |
| else if (nChar >= 0xA1 && nChar <= 0xFE) |
| { |
| nRow = nChar - 0xA1; |
| eState = IMPL_EUC_TW_TO_UNICODE_STATE_1; |
| } |
| else if (nChar == 0x8E) |
| eState = IMPL_EUC_TW_TO_UNICODE_STATE_2_1; |
| else |
| { |
| bUndefined = sal_False; |
| goto bad_input; |
| } |
| break; |
| |
| case IMPL_EUC_TW_TO_UNICODE_STATE_1: |
| if (nChar >= 0xA1 && nChar <= 0xFE) |
| { |
| nPlane = 0; |
| goto transform; |
| } |
| else |
| { |
| bUndefined = sal_False; |
| goto bad_input; |
| } |
| break; |
| |
| case IMPL_EUC_TW_TO_UNICODE_STATE_2_1: |
| if (nChar >= 0xA1 && nChar <= 0xB0) |
| { |
| nPlane = nChar - 0xA1; |
| ++eState; |
| } |
| else |
| { |
| bUndefined = sal_False; |
| goto bad_input; |
| } |
| break; |
| |
| case IMPL_EUC_TW_TO_UNICODE_STATE_2_2: |
| if (nChar >= 0xA1 && nChar <= 0xFE) |
| { |
| nRow = nChar - 0xA1; |
| ++eState; |
| } |
| else |
| { |
| bUndefined = sal_False; |
| goto bad_input; |
| } |
| break; |
| |
| case IMPL_EUC_TW_TO_UNICODE_STATE_2_3: |
| if (nChar >= 0xA1 && nChar <= 0xFE) |
| goto transform; |
| else |
| { |
| bUndefined = sal_False; |
| goto bad_input; |
| } |
| break; |
| } |
| continue; |
| |
| transform: |
| { |
| sal_Int32 nPlaneOffset = pCns116431992PlaneOffsets[nPlane]; |
| if (nPlaneOffset == -1) |
| goto bad_input; |
| else |
| { |
| sal_Int32 nOffset |
| = pCns116431992RowOffsets[nPlaneOffset + nRow]; |
| if (nOffset == -1) |
| goto bad_input; |
| else |
| { |
| sal_uInt32 nFirstLast = pCns116431992Data[nOffset++]; |
| sal_uInt32 nFirst = nFirstLast & 0xFF; |
| sal_uInt32 nLast = nFirstLast >> 8; |
| nChar -= 0xA0; |
| if (nChar >= nFirst && nChar <= nLast) |
| { |
| sal_uInt32 nUnicode |
| = pCns116431992Data[nOffset + (nChar - nFirst)]; |
| if (nUnicode == 0xFFFF) |
| goto bad_input; |
| else if (ImplIsHighSurrogate(nUnicode)) |
| if (pDestBufEnd - pDestBufPtr >= 2) |
| { |
| nOffset += nLast - nFirst + 1; |
| nFirst = pCns116431992Data[nOffset++]; |
| *pDestBufPtr++ = (sal_Unicode) nUnicode; |
| *pDestBufPtr++ |
| = (sal_Unicode) |
| pCns116431992Data[ |
| nOffset + (nChar - nFirst)]; |
| } |
| else |
| goto no_output; |
| else |
| if (pDestBufPtr != pDestBufEnd) |
| *pDestBufPtr++ = (sal_Unicode) nUnicode; |
| else |
| goto no_output; |
| } |
| else |
| goto bad_input; |
| eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; |
| } |
| } |
| continue; |
| } |
| |
| bad_input: |
| switch (ImplHandleBadInputTextToUnicodeConversion( |
| bUndefined, sal_True, 0, nFlags, &pDestBufPtr, pDestBufEnd, |
| &nInfo)) |
| { |
| case IMPL_BAD_INPUT_STOP: |
| eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; |
| break; |
| |
| case IMPL_BAD_INPUT_CONTINUE: |
| eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; |
| continue; |
| |
| case IMPL_BAD_INPUT_NO_OUTPUT: |
| goto no_output; |
| } |
| break; |
| |
| no_output: |
| --pSrcBuf; |
| nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL; |
| break; |
| } |
| |
| if (eState != IMPL_EUC_TW_TO_UNICODE_STATE_0 |
| && (nInfo & (RTL_TEXTTOUNICODE_INFO_ERROR |
| | RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL)) |
| == 0) |
| { |
| if ((nFlags & RTL_TEXTTOUNICODE_FLAGS_FLUSH) == 0) |
| nInfo |= RTL_TEXTTOUNICODE_INFO_SRCBUFFERTOSMALL; |
| else |
| switch (ImplHandleBadInputTextToUnicodeConversion( |
| sal_False, sal_True, 0, nFlags, &pDestBufPtr, |
| pDestBufEnd, &nInfo)) |
| { |
| case IMPL_BAD_INPUT_STOP: |
| case IMPL_BAD_INPUT_CONTINUE: |
| eState = IMPL_EUC_TW_TO_UNICODE_STATE_0; |
| break; |
| |
| case IMPL_BAD_INPUT_NO_OUTPUT: |
| nInfo |= RTL_TEXTTOUNICODE_INFO_DESTBUFFERTOSMALL; |
| break; |
| } |
| } |
| |
| if (pContext) |
| { |
| ((ImplEucTwToUnicodeContext *) pContext)->m_eState = eState; |
| ((ImplEucTwToUnicodeContext *) pContext)->m_nPlane = nPlane; |
| ((ImplEucTwToUnicodeContext *) pContext)->m_nRow = nRow; |
| } |
| if (pInfo) |
| *pInfo = nInfo; |
| if (pSrcCvtBytes) |
| *pSrcCvtBytes = nConverted; |
| |
| return pDestBufPtr - pDestBuf; |
| } |
| |
| sal_Size ImplConvertUnicodeToEucTw(ImplTextConverterData const * pData, |
| void * pContext, |
| sal_Unicode const * pSrcBuf, |
| sal_Size nSrcChars, |
| sal_Char * pDestBuf, |
| sal_Size nDestBytes, |
| sal_uInt32 nFlags, |
| sal_uInt32 * pInfo, |
| sal_Size * pSrcCvtChars) |
| { |
| sal_uInt8 const * pCns116431992Data |
| = ((ImplEucTwConverterData const *) pData)-> |
| m_pUnicodeToCns116431992Data; |
| sal_Int32 const * pCns116431992PageOffsets |
| = ((ImplEucTwConverterData const *) pData)-> |
| m_pUnicodeToCns116431992PageOffsets; |
| sal_Int32 const * pCns116431992PlaneOffsets |
| = ((ImplEucTwConverterData const *) pData)-> |
| m_pUnicodeToCns116431992PlaneOffsets; |
| sal_Unicode nHighSurrogate = 0; |
| sal_uInt32 nInfo = 0; |
| sal_Size nConverted = 0; |
| sal_Char * pDestBufPtr = pDestBuf; |
| sal_Char * pDestBufEnd = pDestBuf + nDestBytes; |
| |
| if (pContext) |
| nHighSurrogate |
| = ((ImplUnicodeToTextContext *) pContext)->m_nHighSurrogate; |
| |
| for (; nConverted < nSrcChars; ++nConverted) |
| { |
| sal_Bool bUndefined = sal_True; |
| sal_uInt32 nChar = *pSrcBuf++; |
| if (nHighSurrogate == 0) |
| { |
| if (ImplIsHighSurrogate(nChar)) |
| { |
| nHighSurrogate = (sal_Unicode) nChar; |
| continue; |
| } |
| } |
| else if (ImplIsLowSurrogate(nChar)) |
| nChar = ImplCombineSurrogates(nHighSurrogate, nChar); |
| else |
| { |
| bUndefined = sal_False; |
| goto bad_input; |
| } |
| |
| if (ImplIsLowSurrogate(nChar) || ImplIsNoncharacter(nChar)) |
| { |
| bUndefined = sal_False; |
| goto bad_input; |
| } |
| |
| if (nChar < 0x80) |
| if (pDestBufPtr != pDestBufEnd) |
| *pDestBufPtr++ = (sal_Char) nChar; |
| else |
| goto no_output; |
| else |
| { |
| sal_Int32 nOffset = pCns116431992PlaneOffsets[nChar >> 16]; |
| sal_uInt32 nFirst; |
| sal_uInt32 nLast; |
| sal_uInt32 nPlane; |
| if (nOffset == -1) |
| goto bad_input; |
| nOffset |
| = pCns116431992PageOffsets[nOffset + ((nChar & 0xFF00) >> 8)]; |
| if (nOffset == -1) |
| goto bad_input; |
| nFirst = pCns116431992Data[nOffset++]; |
| nLast = pCns116431992Data[nOffset++]; |
| nChar &= 0xFF; |
| if (nChar < nFirst || nChar > nLast) |
| goto bad_input; |
| nOffset += 3 * (nChar - nFirst); |
| nPlane = pCns116431992Data[nOffset++]; |
| if (nPlane == 0) |
| goto bad_input; |
| if (pDestBufEnd - pDestBufPtr < (nPlane == 1 ? 2 : 4)) |
| goto no_output; |
| if (nPlane != 1) |
| { |
| *pDestBufPtr++ = (sal_Char) (unsigned char) 0x8E; |
| *pDestBufPtr++ = (sal_Char) (0xA0 + nPlane); |
| } |
| *pDestBufPtr++ = (sal_Char) (0xA0 + pCns116431992Data[nOffset++]); |
| *pDestBufPtr++ = (sal_Char) (0xA0 + pCns116431992Data[nOffset]); |
| } |
| nHighSurrogate = 0; |
| continue; |
| |
| bad_input: |
| switch (ImplHandleBadInputUnicodeToTextConversion(bUndefined, |
| nChar, |
| nFlags, |
| &pDestBufPtr, |
| pDestBufEnd, |
| &nInfo, |
| NULL, |
| 0, |
| NULL)) |
| { |
| case IMPL_BAD_INPUT_STOP: |
| nHighSurrogate = 0; |
| break; |
| |
| case IMPL_BAD_INPUT_CONTINUE: |
| nHighSurrogate = 0; |
| continue; |
| |
| case IMPL_BAD_INPUT_NO_OUTPUT: |
| goto no_output; |
| } |
| break; |
| |
| no_output: |
| --pSrcBuf; |
| nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL; |
| break; |
| } |
| |
| if (nHighSurrogate != 0 |
| && (nInfo & (RTL_UNICODETOTEXT_INFO_ERROR |
| | RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL)) |
| == 0) |
| { |
| if ((nFlags & RTL_UNICODETOTEXT_FLAGS_FLUSH) != 0) |
| nInfo |= RTL_UNICODETOTEXT_INFO_SRCBUFFERTOSMALL; |
| else |
| switch (ImplHandleBadInputUnicodeToTextConversion(sal_False, |
| 0, |
| nFlags, |
| &pDestBufPtr, |
| pDestBufEnd, |
| &nInfo, |
| NULL, |
| 0, |
| NULL)) |
| { |
| case IMPL_BAD_INPUT_STOP: |
| case IMPL_BAD_INPUT_CONTINUE: |
| nHighSurrogate = 0; |
| break; |
| |
| case IMPL_BAD_INPUT_NO_OUTPUT: |
| nInfo |= RTL_UNICODETOTEXT_INFO_DESTBUFFERTOSMALL; |
| break; |
| } |
| } |
| |
| if (pContext) |
| ((ImplUnicodeToTextContext *) pContext)->m_nHighSurrogate |
| = nHighSurrogate; |
| if (pInfo) |
| *pInfo = nInfo; |
| if (pSrcCvtChars) |
| *pSrcCvtChars = nConverted; |
| |
| return pDestBufPtr - pDestBuf; |
| } |
