| /* |
| ****************************************************************************** |
| * |
| * Copyright (C) 1998-2015, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ****************************************************************************** |
| * |
| * ucnv.c: |
| * Implements APIs for the ICU's codeset conversion library; |
| * mostly calls through internal functions; |
| * created by Bertrand A. Damiba |
| * |
| * Modification History: |
| * |
| * Date Name Description |
| * 04/04/99 helena Fixed internal header inclusion. |
| * 05/09/00 helena Added implementation to handle fallback mappings. |
| * 06/20/2000 helena OS/400 port changes; mostly typecast. |
| */ |
| |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_CONVERSION |
| |
| #include "unicode/ustring.h" |
| #include "unicode/ucnv.h" |
| #include "unicode/ucnv_err.h" |
| #include "unicode/uset.h" |
| #include "unicode/utf.h" |
| #include "unicode/utf16.h" |
| #include "putilimp.h" |
| #include "cmemory.h" |
| #include "cstring.h" |
| #include "uassert.h" |
| #include "utracimp.h" |
| #include "ustr_imp.h" |
| #include "ucnv_imp.h" |
| #include "ucnv_cnv.h" |
| #include "ucnv_bld.h" |
| |
| /* size of intermediate and preflighting buffers in ucnv_convert() */ |
| #define CHUNK_SIZE 1024 |
| |
| typedef struct UAmbiguousConverter { |
| const char *name; |
| const UChar variant5c; |
| } UAmbiguousConverter; |
| |
| static const UAmbiguousConverter ambiguousConverters[]={ |
| { "ibm-897_P100-1995", 0xa5 }, |
| { "ibm-942_P120-1999", 0xa5 }, |
| { "ibm-943_P130-1999", 0xa5 }, |
| { "ibm-946_P100-1995", 0xa5 }, |
| { "ibm-33722_P120-1999", 0xa5 }, |
| { "ibm-1041_P100-1995", 0xa5 }, |
| /*{ "ibm-54191_P100-2006", 0xa5 },*/ |
| /*{ "ibm-62383_P100-2007", 0xa5 },*/ |
| /*{ "ibm-891_P100-1995", 0x20a9 },*/ |
| { "ibm-944_P100-1995", 0x20a9 }, |
| { "ibm-949_P110-1999", 0x20a9 }, |
| { "ibm-1363_P110-1997", 0x20a9 }, |
| { "ISO_2022,locale=ko,version=0", 0x20a9 }, |
| { "ibm-1088_P100-1995", 0x20a9 } |
| }; |
| |
| /*Calls through createConverter */ |
| U_CAPI UConverter* U_EXPORT2 |
| ucnv_open (const char *name, |
| UErrorCode * err) |
| { |
| UConverter *r; |
| |
| if (err == NULL || U_FAILURE (*err)) { |
| return NULL; |
| } |
| |
| r = ucnv_createConverter(NULL, name, err); |
| return r; |
| } |
| |
| U_CAPI UConverter* U_EXPORT2 |
| ucnv_openPackage (const char *packageName, const char *converterName, UErrorCode * err) |
| { |
| return ucnv_createConverterFromPackage(packageName, converterName, err); |
| } |
| |
| /*Extracts the UChar* to a char* and calls through createConverter */ |
| U_CAPI UConverter* U_EXPORT2 |
| ucnv_openU (const UChar * name, |
| UErrorCode * err) |
| { |
| char asciiName[UCNV_MAX_CONVERTER_NAME_LENGTH]; |
| |
| if (err == NULL || U_FAILURE(*err)) |
| return NULL; |
| if (name == NULL) |
| return ucnv_open (NULL, err); |
| if (u_strlen(name) >= UCNV_MAX_CONVERTER_NAME_LENGTH) |
| { |
| *err = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| return ucnv_open(u_austrcpy(asciiName, name), err); |
| } |
| |
| /* Copy the string that is represented by the UConverterPlatform enum |
| * @param platformString An output buffer |
| * @param platform An enum representing a platform |
| * @return the length of the copied string. |
| */ |
| static int32_t |
| ucnv_copyPlatformString(char *platformString, UConverterPlatform pltfrm) |
| { |
| switch (pltfrm) |
| { |
| case UCNV_IBM: |
| uprv_strcpy(platformString, "ibm-"); |
| return 4; |
| case UCNV_UNKNOWN: |
| break; |
| } |
| |
| /* default to empty string */ |
| *platformString = 0; |
| return 0; |
| } |
| |
| /*Assumes a $platform-#codepage.$CONVERTER_FILE_EXTENSION scheme and calls |
| *through createConverter*/ |
| U_CAPI UConverter* U_EXPORT2 |
| ucnv_openCCSID (int32_t codepage, |
| UConverterPlatform platform, |
| UErrorCode * err) |
| { |
| char myName[UCNV_MAX_CONVERTER_NAME_LENGTH]; |
| int32_t myNameLen; |
| |
| if (err == NULL || U_FAILURE (*err)) |
| return NULL; |
| |
| /* ucnv_copyPlatformString could return "ibm-" or "cp" */ |
| myNameLen = ucnv_copyPlatformString(myName, platform); |
| T_CString_integerToString(myName + myNameLen, codepage, 10); |
| |
| return ucnv_createConverter(NULL, myName, err); |
| } |
| |
| /* Creating a temporary stack-based object that can be used in one thread, |
| and created from a converter that is shared across threads. |
| */ |
| |
| U_CAPI UConverter* U_EXPORT2 |
| ucnv_safeClone(const UConverter* cnv, void *stackBuffer, int32_t *pBufferSize, UErrorCode *status) |
| { |
| UConverter *localConverter, *allocatedConverter; |
| int32_t stackBufferSize; |
| int32_t bufferSizeNeeded; |
| char *stackBufferChars = (char *)stackBuffer; |
| UErrorCode cbErr; |
| UConverterToUnicodeArgs toUArgs = { |
| sizeof(UConverterToUnicodeArgs), |
| TRUE, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| UConverterFromUnicodeArgs fromUArgs = { |
| sizeof(UConverterFromUnicodeArgs), |
| TRUE, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| |
| UTRACE_ENTRY_OC(UTRACE_UCNV_CLONE); |
| |
| if (status == NULL || U_FAILURE(*status)){ |
| UTRACE_EXIT_STATUS(status? *status: U_ILLEGAL_ARGUMENT_ERROR); |
| return NULL; |
| } |
| |
| if (cnv == NULL) { |
| *status = U_ILLEGAL_ARGUMENT_ERROR; |
| UTRACE_EXIT_STATUS(*status); |
| return NULL; |
| } |
| |
| UTRACE_DATA3(UTRACE_OPEN_CLOSE, "clone converter %s at %p into stackBuffer %p", |
| ucnv_getName(cnv, status), cnv, stackBuffer); |
| |
| if (cnv->sharedData->impl->safeClone != NULL) { |
| /* call the custom safeClone function for sizing */ |
| bufferSizeNeeded = 0; |
| cnv->sharedData->impl->safeClone(cnv, NULL, &bufferSizeNeeded, status); |
| if (U_FAILURE(*status)) { |
| UTRACE_EXIT_STATUS(*status); |
| return NULL; |
| } |
| } |
| else |
| { |
| /* inherent sizing */ |
| bufferSizeNeeded = sizeof(UConverter); |
| } |
| |
| if (pBufferSize == NULL) { |
| stackBufferSize = 1; |
| pBufferSize = &stackBufferSize; |
| } else { |
| stackBufferSize = *pBufferSize; |
| if (stackBufferSize <= 0){ /* 'preflighting' request - set needed size into *pBufferSize */ |
| *pBufferSize = bufferSizeNeeded; |
| UTRACE_EXIT_VALUE(bufferSizeNeeded); |
| return NULL; |
| } |
| } |
| |
| |
| /* Pointers on 64-bit platforms need to be aligned |
| * on a 64-bit boundary in memory. |
| */ |
| if (U_ALIGNMENT_OFFSET(stackBuffer) != 0) { |
| int32_t offsetUp = (int32_t)U_ALIGNMENT_OFFSET_UP(stackBufferChars); |
| if(stackBufferSize > offsetUp) { |
| stackBufferSize -= offsetUp; |
| stackBufferChars += offsetUp; |
| } else { |
| /* prevent using the stack buffer but keep the size > 0 so that we do not just preflight */ |
| stackBufferSize = 1; |
| } |
| } |
| |
| stackBuffer = (void *)stackBufferChars; |
| |
| /* Now, see if we must allocate any memory */ |
| if (stackBufferSize < bufferSizeNeeded || stackBuffer == NULL) |
| { |
| /* allocate one here...*/ |
| localConverter = allocatedConverter = (UConverter *) uprv_malloc (bufferSizeNeeded); |
| |
| if(localConverter == NULL) { |
| *status = U_MEMORY_ALLOCATION_ERROR; |
| UTRACE_EXIT_STATUS(*status); |
| return NULL; |
| } |
| *status = U_SAFECLONE_ALLOCATED_WARNING; |
| |
| /* record the fact that memory was allocated */ |
| *pBufferSize = bufferSizeNeeded; |
| } else { |
| /* just use the stack buffer */ |
| localConverter = (UConverter*) stackBuffer; |
| allocatedConverter = NULL; |
| } |
| |
| uprv_memset(localConverter, 0, bufferSizeNeeded); |
| |
| /* Copy initial state */ |
| uprv_memcpy(localConverter, cnv, sizeof(UConverter)); |
| localConverter->isCopyLocal = localConverter->isExtraLocal = FALSE; |
| |
| /* copy the substitution string */ |
| if (cnv->subChars == (uint8_t *)cnv->subUChars) { |
| localConverter->subChars = (uint8_t *)localConverter->subUChars; |
| } else { |
| localConverter->subChars = (uint8_t *)uprv_malloc(UCNV_ERROR_BUFFER_LENGTH * U_SIZEOF_UCHAR); |
| if (localConverter->subChars == NULL) { |
| uprv_free(allocatedConverter); |
| UTRACE_EXIT_STATUS(*status); |
| return NULL; |
| } |
| uprv_memcpy(localConverter->subChars, cnv->subChars, UCNV_ERROR_BUFFER_LENGTH * U_SIZEOF_UCHAR); |
| } |
| |
| /* now either call the safeclone fcn or not */ |
| if (cnv->sharedData->impl->safeClone != NULL) { |
| /* call the custom safeClone function */ |
| localConverter = cnv->sharedData->impl->safeClone(cnv, localConverter, pBufferSize, status); |
| } |
| |
| if(localConverter==NULL || U_FAILURE(*status)) { |
| if (allocatedConverter != NULL && allocatedConverter->subChars != (uint8_t *)allocatedConverter->subUChars) { |
| uprv_free(allocatedConverter->subChars); |
| } |
| uprv_free(allocatedConverter); |
| UTRACE_EXIT_STATUS(*status); |
| return NULL; |
| } |
| |
| /* increment refcount of shared data if needed */ |
| if (cnv->sharedData->isReferenceCounted) { |
| ucnv_incrementRefCount(cnv->sharedData); |
| } |
| |
| if(localConverter == (UConverter*)stackBuffer) { |
| /* we're using user provided data - set to not destroy */ |
| localConverter->isCopyLocal = TRUE; |
| } |
| |
| /* allow callback functions to handle any memory allocation */ |
| toUArgs.converter = fromUArgs.converter = localConverter; |
| cbErr = U_ZERO_ERROR; |
| cnv->fromCharErrorBehaviour(cnv->toUContext, &toUArgs, NULL, 0, UCNV_CLONE, &cbErr); |
| cbErr = U_ZERO_ERROR; |
| cnv->fromUCharErrorBehaviour(cnv->fromUContext, &fromUArgs, NULL, 0, 0, UCNV_CLONE, &cbErr); |
| |
| UTRACE_EXIT_PTR_STATUS(localConverter, *status); |
| return localConverter; |
| } |
| |
| |
| |
| /*Decreases the reference counter in the shared immutable section of the object |
| *and frees the mutable part*/ |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_close (UConverter * converter) |
| { |
| UErrorCode errorCode = U_ZERO_ERROR; |
| |
| UTRACE_ENTRY_OC(UTRACE_UCNV_CLOSE); |
| |
| if (converter == NULL) |
| { |
| UTRACE_EXIT(); |
| return; |
| } |
| |
| UTRACE_DATA3(UTRACE_OPEN_CLOSE, "close converter %s at %p, isCopyLocal=%b", |
| ucnv_getName(converter, &errorCode), converter, converter->isCopyLocal); |
| |
| /* In order to speed up the close, only call the callbacks when they have been changed. |
| This performance check will only work when the callbacks are set within a shared library |
| or from user code that statically links this code. */ |
| /* first, notify the callback functions that the converter is closed */ |
| if (converter->fromCharErrorBehaviour != UCNV_TO_U_DEFAULT_CALLBACK) { |
| UConverterToUnicodeArgs toUArgs = { |
| sizeof(UConverterToUnicodeArgs), |
| TRUE, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| |
| toUArgs.converter = converter; |
| errorCode = U_ZERO_ERROR; |
| converter->fromCharErrorBehaviour(converter->toUContext, &toUArgs, NULL, 0, UCNV_CLOSE, &errorCode); |
| } |
| if (converter->fromUCharErrorBehaviour != UCNV_FROM_U_DEFAULT_CALLBACK) { |
| UConverterFromUnicodeArgs fromUArgs = { |
| sizeof(UConverterFromUnicodeArgs), |
| TRUE, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| fromUArgs.converter = converter; |
| errorCode = U_ZERO_ERROR; |
| converter->fromUCharErrorBehaviour(converter->fromUContext, &fromUArgs, NULL, 0, 0, UCNV_CLOSE, &errorCode); |
| } |
| |
| if (converter->sharedData->impl->close != NULL) { |
| converter->sharedData->impl->close(converter); |
| } |
| |
| if (converter->subChars != (uint8_t *)converter->subUChars) { |
| uprv_free(converter->subChars); |
| } |
| |
| if (converter->sharedData->isReferenceCounted) { |
| ucnv_unloadSharedDataIfReady(converter->sharedData); |
| } |
| |
| if(!converter->isCopyLocal){ |
| uprv_free(converter); |
| } |
| |
| UTRACE_EXIT(); |
| } |
| |
| /*returns a single Name from the list, will return NULL if out of bounds |
| */ |
| U_CAPI const char* U_EXPORT2 |
| ucnv_getAvailableName (int32_t n) |
| { |
| if (0 <= n && n <= 0xffff) { |
| UErrorCode err = U_ZERO_ERROR; |
| const char *name = ucnv_bld_getAvailableConverter((uint16_t)n, &err); |
| if (U_SUCCESS(err)) { |
| return name; |
| } |
| } |
| return NULL; |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_countAvailable () |
| { |
| UErrorCode err = U_ZERO_ERROR; |
| return ucnv_bld_countAvailableConverters(&err); |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_getSubstChars (const UConverter * converter, |
| char *mySubChar, |
| int8_t * len, |
| UErrorCode * err) |
| { |
| if (U_FAILURE (*err)) |
| return; |
| |
| if (converter->subCharLen <= 0) { |
| /* Unicode string or empty string from ucnv_setSubstString(). */ |
| *len = 0; |
| return; |
| } |
| |
| if (*len < converter->subCharLen) /*not enough space in subChars */ |
| { |
| *err = U_INDEX_OUTOFBOUNDS_ERROR; |
| return; |
| } |
| |
| uprv_memcpy (mySubChar, converter->subChars, converter->subCharLen); /*fills in the subchars */ |
| *len = converter->subCharLen; /*store # of bytes copied to buffer */ |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_setSubstChars (UConverter * converter, |
| const char *mySubChar, |
| int8_t len, |
| UErrorCode * err) |
| { |
| if (U_FAILURE (*err)) |
| return; |
| |
| /*Makes sure that the subChar is within the codepages char length boundaries */ |
| if ((len > converter->sharedData->staticData->maxBytesPerChar) |
| || (len < converter->sharedData->staticData->minBytesPerChar)) |
| { |
| *err = U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| uprv_memcpy (converter->subChars, mySubChar, len); /*copies the subchars */ |
| converter->subCharLen = len; /*sets the new len */ |
| |
| /* |
| * There is currently (2001Feb) no separate API to set/get subChar1. |
| * In order to always have subChar written after it is explicitly set, |
| * we set subChar1 to 0. |
| */ |
| converter->subChar1 = 0; |
| |
| return; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_setSubstString(UConverter *cnv, |
| const UChar *s, |
| int32_t length, |
| UErrorCode *err) { |
| UAlignedMemory cloneBuffer[U_CNV_SAFECLONE_BUFFERSIZE / sizeof(UAlignedMemory) + 1]; |
| char chars[UCNV_ERROR_BUFFER_LENGTH]; |
| |
| UConverter *clone; |
| uint8_t *subChars; |
| int32_t cloneSize, length8; |
| |
| /* Let the following functions check all arguments. */ |
| cloneSize = sizeof(cloneBuffer); |
| clone = ucnv_safeClone(cnv, cloneBuffer, &cloneSize, err); |
| ucnv_setFromUCallBack(clone, UCNV_FROM_U_CALLBACK_STOP, NULL, NULL, NULL, err); |
| length8 = ucnv_fromUChars(clone, chars, (int32_t)sizeof(chars), s, length, err); |
| ucnv_close(clone); |
| if (U_FAILURE(*err)) { |
| return; |
| } |
| |
| if (cnv->sharedData->impl->writeSub == NULL |
| #if !UCONFIG_NO_LEGACY_CONVERSION |
| || (cnv->sharedData->staticData->conversionType == UCNV_MBCS && |
| ucnv_MBCSGetType(cnv) != UCNV_EBCDIC_STATEFUL) |
| #endif |
| ) { |
| /* The converter is not stateful. Store the charset bytes as a fixed string. */ |
| subChars = (uint8_t *)chars; |
| } else { |
| /* |
| * The converter has a non-default writeSub() function, indicating |
| * that it is stateful. |
| * Store the Unicode string for on-the-fly conversion for correct |
| * state handling. |
| */ |
| if (length > UCNV_ERROR_BUFFER_LENGTH) { |
| /* |
| * Should not occur. The converter should output at least one byte |
| * per UChar, which means that ucnv_fromUChars() should catch all |
| * overflows. |
| */ |
| *err = U_BUFFER_OVERFLOW_ERROR; |
| return; |
| } |
| subChars = (uint8_t *)s; |
| if (length < 0) { |
| length = u_strlen(s); |
| } |
| length8 = length * U_SIZEOF_UCHAR; |
| } |
| |
| /* |
| * For storing the substitution string, select either the small buffer inside |
| * UConverter or allocate a subChars buffer. |
| */ |
| if (length8 > UCNV_MAX_SUBCHAR_LEN) { |
| /* Use a separate buffer for the string. Outside UConverter to not make it too large. */ |
| if (cnv->subChars == (uint8_t *)cnv->subUChars) { |
| /* Allocate a new buffer for the string. */ |
| cnv->subChars = (uint8_t *)uprv_malloc(UCNV_ERROR_BUFFER_LENGTH * U_SIZEOF_UCHAR); |
| if (cnv->subChars == NULL) { |
| cnv->subChars = (uint8_t *)cnv->subUChars; |
| *err = U_MEMORY_ALLOCATION_ERROR; |
| return; |
| } |
| uprv_memset(cnv->subChars, 0, UCNV_ERROR_BUFFER_LENGTH * U_SIZEOF_UCHAR); |
| } |
| } |
| |
| /* Copy the substitution string into the UConverter or its subChars buffer. */ |
| if (length8 == 0) { |
| cnv->subCharLen = 0; |
| } else { |
| uprv_memcpy(cnv->subChars, subChars, length8); |
| if (subChars == (uint8_t *)chars) { |
| cnv->subCharLen = (int8_t)length8; |
| } else /* subChars == s */ { |
| cnv->subCharLen = (int8_t)-length; |
| } |
| } |
| |
| /* See comment in ucnv_setSubstChars(). */ |
| cnv->subChar1 = 0; |
| } |
| |
| /*resets the internal states of a converter |
| *goal : have the same behaviour than a freshly created converter |
| */ |
| static void _reset(UConverter *converter, UConverterResetChoice choice, |
| UBool callCallback) { |
| if(converter == NULL) { |
| return; |
| } |
| |
| if(callCallback) { |
| /* first, notify the callback functions that the converter is reset */ |
| UErrorCode errorCode; |
| |
| if(choice<=UCNV_RESET_TO_UNICODE && converter->fromCharErrorBehaviour != UCNV_TO_U_DEFAULT_CALLBACK) { |
| UConverterToUnicodeArgs toUArgs = { |
| sizeof(UConverterToUnicodeArgs), |
| TRUE, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| toUArgs.converter = converter; |
| errorCode = U_ZERO_ERROR; |
| converter->fromCharErrorBehaviour(converter->toUContext, &toUArgs, NULL, 0, UCNV_RESET, &errorCode); |
| } |
| if(choice!=UCNV_RESET_TO_UNICODE && converter->fromUCharErrorBehaviour != UCNV_FROM_U_DEFAULT_CALLBACK) { |
| UConverterFromUnicodeArgs fromUArgs = { |
| sizeof(UConverterFromUnicodeArgs), |
| TRUE, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL, |
| NULL |
| }; |
| fromUArgs.converter = converter; |
| errorCode = U_ZERO_ERROR; |
| converter->fromUCharErrorBehaviour(converter->fromUContext, &fromUArgs, NULL, 0, 0, UCNV_RESET, &errorCode); |
| } |
| } |
| |
| /* now reset the converter itself */ |
| if(choice<=UCNV_RESET_TO_UNICODE) { |
| converter->toUnicodeStatus = converter->sharedData->toUnicodeStatus; |
| converter->mode = 0; |
| converter->toULength = 0; |
| converter->invalidCharLength = converter->UCharErrorBufferLength = 0; |
| converter->preToULength = 0; |
| } |
| if(choice!=UCNV_RESET_TO_UNICODE) { |
| converter->fromUnicodeStatus = 0; |
| converter->fromUChar32 = 0; |
| converter->invalidUCharLength = converter->charErrorBufferLength = 0; |
| converter->preFromUFirstCP = U_SENTINEL; |
| converter->preFromULength = 0; |
| } |
| |
| if (converter->sharedData->impl->reset != NULL) { |
| /* call the custom reset function */ |
| converter->sharedData->impl->reset(converter, choice); |
| } |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_reset(UConverter *converter) |
| { |
| _reset(converter, UCNV_RESET_BOTH, TRUE); |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_resetToUnicode(UConverter *converter) |
| { |
| _reset(converter, UCNV_RESET_TO_UNICODE, TRUE); |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_resetFromUnicode(UConverter *converter) |
| { |
| _reset(converter, UCNV_RESET_FROM_UNICODE, TRUE); |
| } |
| |
| U_CAPI int8_t U_EXPORT2 |
| ucnv_getMaxCharSize (const UConverter * converter) |
| { |
| return converter->maxBytesPerUChar; |
| } |
| |
| |
| U_CAPI int8_t U_EXPORT2 |
| ucnv_getMinCharSize (const UConverter * converter) |
| { |
| return converter->sharedData->staticData->minBytesPerChar; |
| } |
| |
| U_CAPI const char* U_EXPORT2 |
| ucnv_getName (const UConverter * converter, UErrorCode * err) |
| |
| { |
| if (U_FAILURE (*err)) |
| return NULL; |
| if(converter->sharedData->impl->getName){ |
| const char* temp= converter->sharedData->impl->getName(converter); |
| if(temp) |
| return temp; |
| } |
| return converter->sharedData->staticData->name; |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_getCCSID(const UConverter * converter, |
| UErrorCode * err) |
| { |
| int32_t ccsid; |
| if (U_FAILURE (*err)) |
| return -1; |
| |
| ccsid = converter->sharedData->staticData->codepage; |
| if (ccsid == 0) { |
| /* Rare case. This is for cases like gb18030, |
| which doesn't have an IBM canonical name, but does have an IBM alias. */ |
| const char *standardName = ucnv_getStandardName(ucnv_getName(converter, err), "IBM", err); |
| if (U_SUCCESS(*err) && standardName) { |
| const char *ccsidStr = uprv_strchr(standardName, '-'); |
| if (ccsidStr) { |
| ccsid = (int32_t)atol(ccsidStr+1); /* +1 to skip '-' */ |
| } |
| } |
| } |
| return ccsid; |
| } |
| |
| |
| U_CAPI UConverterPlatform U_EXPORT2 |
| ucnv_getPlatform (const UConverter * converter, |
| UErrorCode * err) |
| { |
| if (U_FAILURE (*err)) |
| return UCNV_UNKNOWN; |
| |
| return (UConverterPlatform)converter->sharedData->staticData->platform; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_getToUCallBack (const UConverter * converter, |
| UConverterToUCallback *action, |
| const void **context) |
| { |
| *action = converter->fromCharErrorBehaviour; |
| *context = converter->toUContext; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_getFromUCallBack (const UConverter * converter, |
| UConverterFromUCallback *action, |
| const void **context) |
| { |
| *action = converter->fromUCharErrorBehaviour; |
| *context = converter->fromUContext; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_setToUCallBack (UConverter * converter, |
| UConverterToUCallback newAction, |
| const void* newContext, |
| UConverterToUCallback *oldAction, |
| const void** oldContext, |
| UErrorCode * err) |
| { |
| if (U_FAILURE (*err)) |
| return; |
| if (oldAction) *oldAction = converter->fromCharErrorBehaviour; |
| converter->fromCharErrorBehaviour = newAction; |
| if (oldContext) *oldContext = converter->toUContext; |
| converter->toUContext = newContext; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_setFromUCallBack (UConverter * converter, |
| UConverterFromUCallback newAction, |
| const void* newContext, |
| UConverterFromUCallback *oldAction, |
| const void** oldContext, |
| UErrorCode * err) |
| { |
| if (U_FAILURE (*err)) |
| return; |
| if (oldAction) *oldAction = converter->fromUCharErrorBehaviour; |
| converter->fromUCharErrorBehaviour = newAction; |
| if (oldContext) *oldContext = converter->fromUContext; |
| converter->fromUContext = newContext; |
| } |
| |
| static void |
| _updateOffsets(int32_t *offsets, int32_t length, |
| int32_t sourceIndex, int32_t errorInputLength) { |
| int32_t *limit; |
| int32_t delta, offset; |
| |
| if(sourceIndex>=0) { |
| /* |
| * adjust each offset by adding the previous sourceIndex |
| * minus the length of the input sequence that caused an |
| * error, if any |
| */ |
| delta=sourceIndex-errorInputLength; |
| } else { |
| /* |
| * set each offset to -1 because this conversion function |
| * does not handle offsets |
| */ |
| delta=-1; |
| } |
| |
| limit=offsets+length; |
| if(delta==0) { |
| /* most common case, nothing to do */ |
| } else if(delta>0) { |
| /* add the delta to each offset (but not if the offset is <0) */ |
| while(offsets<limit) { |
| offset=*offsets; |
| if(offset>=0) { |
| *offsets=offset+delta; |
| } |
| ++offsets; |
| } |
| } else /* delta<0 */ { |
| /* |
| * set each offset to -1 because this conversion function |
| * does not handle offsets |
| * or the error input sequence started in a previous buffer |
| */ |
| while(offsets<limit) { |
| *offsets++=-1; |
| } |
| } |
| } |
| |
| /* ucnv_fromUnicode --------------------------------------------------------- */ |
| |
| /* |
| * Implementation note for m:n conversions |
| * |
| * While collecting source units to find the longest match for m:n conversion, |
| * some source units may need to be stored for a partial match. |
| * When a second buffer does not yield a match on all of the previously stored |
| * source units, then they must be "replayed", i.e., fed back into the converter. |
| * |
| * The code relies on the fact that replaying will not nest - |
| * converting a replay buffer will not result in a replay. |
| * This is because a replay is necessary only after the _continuation_ of a |
| * partial match failed, but a replay buffer is converted as a whole. |
| * It may result in some of its units being stored again for a partial match, |
| * but there will not be a continuation _during_ the replay which could fail. |
| * |
| * It is conceivable that a callback function could call the converter |
| * recursively in a way that causes another replay to be stored, but that |
| * would be an error in the callback function. |
| * Such violations will cause assertion failures in a debug build, |
| * and wrong output, but they will not cause a crash. |
| */ |
| |
| static void |
| _fromUnicodeWithCallback(UConverterFromUnicodeArgs *pArgs, UErrorCode *err) { |
| UConverterFromUnicode fromUnicode; |
| UConverter *cnv; |
| const UChar *s; |
| char *t; |
| int32_t *offsets; |
| int32_t sourceIndex; |
| int32_t errorInputLength; |
| UBool converterSawEndOfInput, calledCallback; |
| |
| /* variables for m:n conversion */ |
| UChar replay[UCNV_EXT_MAX_UCHARS]; |
| const UChar *realSource, *realSourceLimit; |
| int32_t realSourceIndex; |
| UBool realFlush; |
| |
| cnv=pArgs->converter; |
| s=pArgs->source; |
| t=pArgs->target; |
| offsets=pArgs->offsets; |
| |
| /* get the converter implementation function */ |
| sourceIndex=0; |
| if(offsets==NULL) { |
| fromUnicode=cnv->sharedData->impl->fromUnicode; |
| } else { |
| fromUnicode=cnv->sharedData->impl->fromUnicodeWithOffsets; |
| if(fromUnicode==NULL) { |
| /* there is no WithOffsets implementation */ |
| fromUnicode=cnv->sharedData->impl->fromUnicode; |
| /* we will write -1 for each offset */ |
| sourceIndex=-1; |
| } |
| } |
| |
| if(cnv->preFromULength>=0) { |
| /* normal mode */ |
| realSource=NULL; |
| |
| /* avoid compiler warnings - not otherwise necessary, and the values do not matter */ |
| realSourceLimit=NULL; |
| realFlush=FALSE; |
| realSourceIndex=0; |
| } else { |
| /* |
| * Previous m:n conversion stored source units from a partial match |
| * and failed to consume all of them. |
| * We need to "replay" them from a temporary buffer and convert them first. |
| */ |
| realSource=pArgs->source; |
| realSourceLimit=pArgs->sourceLimit; |
| realFlush=pArgs->flush; |
| realSourceIndex=sourceIndex; |
| |
| uprv_memcpy(replay, cnv->preFromU, -cnv->preFromULength*U_SIZEOF_UCHAR); |
| pArgs->source=replay; |
| pArgs->sourceLimit=replay-cnv->preFromULength; |
| pArgs->flush=FALSE; |
| sourceIndex=-1; |
| |
| cnv->preFromULength=0; |
| } |
| |
| /* |
| * loop for conversion and error handling |
| * |
| * loop { |
| * convert |
| * loop { |
| * update offsets |
| * handle end of input |
| * handle errors/call callback |
| * } |
| * } |
| */ |
| for(;;) { |
| if(U_SUCCESS(*err)) { |
| /* convert */ |
| fromUnicode(pArgs, err); |
| |
| /* |
| * set a flag for whether the converter |
| * successfully processed the end of the input |
| * |
| * need not check cnv->preFromULength==0 because a replay (<0) will cause |
| * s<sourceLimit before converterSawEndOfInput is checked |
| */ |
| converterSawEndOfInput= |
| (UBool)(U_SUCCESS(*err) && |
| pArgs->flush && pArgs->source==pArgs->sourceLimit && |
| cnv->fromUChar32==0); |
| } else { |
| /* handle error from ucnv_convertEx() */ |
| converterSawEndOfInput=FALSE; |
| } |
| |
| /* no callback called yet for this iteration */ |
| calledCallback=FALSE; |
| |
| /* no sourceIndex adjustment for conversion, only for callback output */ |
| errorInputLength=0; |
| |
| /* |
| * loop for offsets and error handling |
| * |
| * iterates at most 3 times: |
| * 1. to clean up after the conversion function |
| * 2. after the callback |
| * 3. after the callback again if there was truncated input |
| */ |
| for(;;) { |
| /* update offsets if we write any */ |
| if(offsets!=NULL) { |
| int32_t length=(int32_t)(pArgs->target-t); |
| if(length>0) { |
| _updateOffsets(offsets, length, sourceIndex, errorInputLength); |
| |
| /* |
| * if a converter handles offsets and updates the offsets |
| * pointer at the end, then pArgs->offset should not change |
| * here; |
| * however, some converters do not handle offsets at all |
| * (sourceIndex<0) or may not update the offsets pointer |
| */ |
| pArgs->offsets=offsets+=length; |
| } |
| |
| if(sourceIndex>=0) { |
| sourceIndex+=(int32_t)(pArgs->source-s); |
| } |
| } |
| |
| if(cnv->preFromULength<0) { |
| /* |
| * switch the source to new replay units (cannot occur while replaying) |
| * after offset handling and before end-of-input and callback handling |
| */ |
| if(realSource==NULL) { |
| realSource=pArgs->source; |
| realSourceLimit=pArgs->sourceLimit; |
| realFlush=pArgs->flush; |
| realSourceIndex=sourceIndex; |
| |
| uprv_memcpy(replay, cnv->preFromU, -cnv->preFromULength*U_SIZEOF_UCHAR); |
| pArgs->source=replay; |
| pArgs->sourceLimit=replay-cnv->preFromULength; |
| pArgs->flush=FALSE; |
| if((sourceIndex+=cnv->preFromULength)<0) { |
| sourceIndex=-1; |
| } |
| |
| cnv->preFromULength=0; |
| } else { |
| /* see implementation note before _fromUnicodeWithCallback() */ |
| U_ASSERT(realSource==NULL); |
| *err=U_INTERNAL_PROGRAM_ERROR; |
| } |
| } |
| |
| /* update pointers */ |
| s=pArgs->source; |
| t=pArgs->target; |
| |
| if(U_SUCCESS(*err)) { |
| if(s<pArgs->sourceLimit) { |
| /* |
| * continue with the conversion loop while there is still input left |
| * (continue converting by breaking out of only the inner loop) |
| */ |
| break; |
| } else if(realSource!=NULL) { |
| /* switch back from replaying to the real source and continue */ |
| pArgs->source=realSource; |
| pArgs->sourceLimit=realSourceLimit; |
| pArgs->flush=realFlush; |
| sourceIndex=realSourceIndex; |
| |
| realSource=NULL; |
| break; |
| } else if(pArgs->flush && cnv->fromUChar32!=0) { |
| /* |
| * the entire input stream is consumed |
| * and there is a partial, truncated input sequence left |
| */ |
| |
| /* inject an error and continue with callback handling */ |
| *err=U_TRUNCATED_CHAR_FOUND; |
| calledCallback=FALSE; /* new error condition */ |
| } else { |
| /* input consumed */ |
| if(pArgs->flush) { |
| /* |
| * return to the conversion loop once more if the flush |
| * flag is set and the conversion function has not |
| * successfully processed the end of the input yet |
| * |
| * (continue converting by breaking out of only the inner loop) |
| */ |
| if(!converterSawEndOfInput) { |
| break; |
| } |
| |
| /* reset the converter without calling the callback function */ |
| _reset(cnv, UCNV_RESET_FROM_UNICODE, FALSE); |
| } |
| |
| /* done successfully */ |
| return; |
| } |
| } |
| |
| /* U_FAILURE(*err) */ |
| { |
| UErrorCode e; |
| |
| if( calledCallback || |
| (e=*err)==U_BUFFER_OVERFLOW_ERROR || |
| (e!=U_INVALID_CHAR_FOUND && |
| e!=U_ILLEGAL_CHAR_FOUND && |
| e!=U_TRUNCATED_CHAR_FOUND) |
| ) { |
| /* |
| * the callback did not or cannot resolve the error: |
| * set output pointers and return |
| * |
| * the check for buffer overflow is redundant but it is |
| * a high-runner case and hopefully documents the intent |
| * well |
| * |
| * if we were replaying, then the replay buffer must be |
| * copied back into the UConverter |
| * and the real arguments must be restored |
| */ |
| if(realSource!=NULL) { |
| int32_t length; |
| |
| U_ASSERT(cnv->preFromULength==0); |
| |
| length=(int32_t)(pArgs->sourceLimit-pArgs->source); |
| if(length>0) { |
| uprv_memcpy(cnv->preFromU, pArgs->source, length*U_SIZEOF_UCHAR); |
| cnv->preFromULength=(int8_t)-length; |
| } |
| |
| pArgs->source=realSource; |
| pArgs->sourceLimit=realSourceLimit; |
| pArgs->flush=realFlush; |
| } |
| |
| return; |
| } |
| } |
| |
| /* callback handling */ |
| { |
| UChar32 codePoint; |
| |
| /* get and write the code point */ |
| codePoint=cnv->fromUChar32; |
| errorInputLength=0; |
| U16_APPEND_UNSAFE(cnv->invalidUCharBuffer, errorInputLength, codePoint); |
| cnv->invalidUCharLength=(int8_t)errorInputLength; |
| |
| /* set the converter state to deal with the next character */ |
| cnv->fromUChar32=0; |
| |
| /* call the callback function */ |
| cnv->fromUCharErrorBehaviour(cnv->fromUContext, pArgs, |
| cnv->invalidUCharBuffer, errorInputLength, codePoint, |
| *err==U_INVALID_CHAR_FOUND ? UCNV_UNASSIGNED : UCNV_ILLEGAL, |
| err); |
| } |
| |
| /* |
| * loop back to the offset handling |
| * |
| * this flag will indicate after offset handling |
| * that a callback was called; |
| * if the callback did not resolve the error, then we return |
| */ |
| calledCallback=TRUE; |
| } |
| } |
| } |
| |
| /* |
| * Output the fromUnicode overflow buffer. |
| * Call this function if(cnv->charErrorBufferLength>0). |
| * @return TRUE if overflow |
| */ |
| static UBool |
| ucnv_outputOverflowFromUnicode(UConverter *cnv, |
| char **target, const char *targetLimit, |
| int32_t **pOffsets, |
| UErrorCode *err) { |
| int32_t *offsets; |
| char *overflow, *t; |
| int32_t i, length; |
| |
| t=*target; |
| if(pOffsets!=NULL) { |
| offsets=*pOffsets; |
| } else { |
| offsets=NULL; |
| } |
| |
| overflow=(char *)cnv->charErrorBuffer; |
| length=cnv->charErrorBufferLength; |
| i=0; |
| while(i<length) { |
| if(t==targetLimit) { |
| /* the overflow buffer contains too much, keep the rest */ |
| int32_t j=0; |
| |
| do { |
| overflow[j++]=overflow[i++]; |
| } while(i<length); |
| |
| cnv->charErrorBufferLength=(int8_t)j; |
| *target=t; |
| if(offsets!=NULL) { |
| *pOffsets=offsets; |
| } |
| *err=U_BUFFER_OVERFLOW_ERROR; |
| return TRUE; |
| } |
| |
| /* copy the overflow contents to the target */ |
| *t++=overflow[i++]; |
| if(offsets!=NULL) { |
| *offsets++=-1; /* no source index available for old output */ |
| } |
| } |
| |
| /* the overflow buffer is completely copied to the target */ |
| cnv->charErrorBufferLength=0; |
| *target=t; |
| if(offsets!=NULL) { |
| *pOffsets=offsets; |
| } |
| return FALSE; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_fromUnicode(UConverter *cnv, |
| char **target, const char *targetLimit, |
| const UChar **source, const UChar *sourceLimit, |
| int32_t *offsets, |
| UBool flush, |
| UErrorCode *err) { |
| UConverterFromUnicodeArgs args; |
| const UChar *s; |
| char *t; |
| |
| /* check parameters */ |
| if(err==NULL || U_FAILURE(*err)) { |
| return; |
| } |
| |
| if(cnv==NULL || target==NULL || source==NULL) { |
| *err=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| s=*source; |
| t=*target; |
| |
| if ((const void *)U_MAX_PTR(sourceLimit) == (const void *)sourceLimit) { |
| /* |
| Prevent code from going into an infinite loop in case we do hit this |
| limit. The limit pointer is expected to be on a UChar * boundary. |
| This also prevents the next argument check from failing. |
| */ |
| sourceLimit = (const UChar *)(((const char *)sourceLimit) - 1); |
| } |
| |
| /* |
| * All these conditions should never happen. |
| * |
| * 1) Make sure that the limits are >= to the address source or target |
| * |
| * 2) Make sure that the buffer sizes do not exceed the number range for |
| * int32_t because some functions use the size (in units or bytes) |
| * rather than comparing pointers, and because offsets are int32_t values. |
| * |
| * size_t is guaranteed to be unsigned and large enough for the job. |
| * |
| * Return with an error instead of adjusting the limits because we would |
| * not be able to maintain the semantics that either the source must be |
| * consumed or the target filled (unless an error occurs). |
| * An adjustment would be targetLimit=t+0x7fffffff; for example. |
| * |
| * 3) Make sure that the user didn't incorrectly cast a UChar * pointer |
| * to a char * pointer and provide an incomplete UChar code unit. |
| */ |
| if (sourceLimit<s || targetLimit<t || |
| ((size_t)(sourceLimit-s)>(size_t)0x3fffffff && sourceLimit>s) || |
| ((size_t)(targetLimit-t)>(size_t)0x7fffffff && targetLimit>t) || |
| (((const char *)sourceLimit-(const char *)s) & 1) != 0) |
| { |
| *err=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| /* output the target overflow buffer */ |
| if( cnv->charErrorBufferLength>0 && |
| ucnv_outputOverflowFromUnicode(cnv, target, targetLimit, &offsets, err) |
| ) { |
| /* U_BUFFER_OVERFLOW_ERROR */ |
| return; |
| } |
| /* *target may have moved, therefore stop using t */ |
| |
| if(!flush && s==sourceLimit && cnv->preFromULength>=0) { |
| /* the overflow buffer is emptied and there is no new input: we are done */ |
| return; |
| } |
| |
| /* |
| * Do not simply return with a buffer overflow error if |
| * !flush && t==targetLimit |
| * because it is possible that the source will not generate any output. |
| * For example, the skip callback may be called; |
| * it does not output anything. |
| */ |
| |
| /* prepare the converter arguments */ |
| args.converter=cnv; |
| args.flush=flush; |
| args.offsets=offsets; |
| args.source=s; |
| args.sourceLimit=sourceLimit; |
| args.target=*target; |
| args.targetLimit=targetLimit; |
| args.size=sizeof(args); |
| |
| _fromUnicodeWithCallback(&args, err); |
| |
| *source=args.source; |
| *target=args.target; |
| } |
| |
| /* ucnv_toUnicode() --------------------------------------------------------- */ |
| |
| static void |
| _toUnicodeWithCallback(UConverterToUnicodeArgs *pArgs, UErrorCode *err) { |
| UConverterToUnicode toUnicode; |
| UConverter *cnv; |
| const char *s; |
| UChar *t; |
| int32_t *offsets; |
| int32_t sourceIndex; |
| int32_t errorInputLength; |
| UBool converterSawEndOfInput, calledCallback; |
| |
| /* variables for m:n conversion */ |
| char replay[UCNV_EXT_MAX_BYTES]; |
| const char *realSource, *realSourceLimit; |
| int32_t realSourceIndex; |
| UBool realFlush; |
| |
| cnv=pArgs->converter; |
| s=pArgs->source; |
| t=pArgs->target; |
| offsets=pArgs->offsets; |
| |
| /* get the converter implementation function */ |
| sourceIndex=0; |
| if(offsets==NULL) { |
| toUnicode=cnv->sharedData->impl->toUnicode; |
| } else { |
| toUnicode=cnv->sharedData->impl->toUnicodeWithOffsets; |
| if(toUnicode==NULL) { |
| /* there is no WithOffsets implementation */ |
| toUnicode=cnv->sharedData->impl->toUnicode; |
| /* we will write -1 for each offset */ |
| sourceIndex=-1; |
| } |
| } |
| |
| if(cnv->preToULength>=0) { |
| /* normal mode */ |
| realSource=NULL; |
| |
| /* avoid compiler warnings - not otherwise necessary, and the values do not matter */ |
| realSourceLimit=NULL; |
| realFlush=FALSE; |
| realSourceIndex=0; |
| } else { |
| /* |
| * Previous m:n conversion stored source units from a partial match |
| * and failed to consume all of them. |
| * We need to "replay" them from a temporary buffer and convert them first. |
| */ |
| realSource=pArgs->source; |
| realSourceLimit=pArgs->sourceLimit; |
| realFlush=pArgs->flush; |
| realSourceIndex=sourceIndex; |
| |
| uprv_memcpy(replay, cnv->preToU, -cnv->preToULength); |
| pArgs->source=replay; |
| pArgs->sourceLimit=replay-cnv->preToULength; |
| pArgs->flush=FALSE; |
| sourceIndex=-1; |
| |
| cnv->preToULength=0; |
| } |
| |
| /* |
| * loop for conversion and error handling |
| * |
| * loop { |
| * convert |
| * loop { |
| * update offsets |
| * handle end of input |
| * handle errors/call callback |
| * } |
| * } |
| */ |
| for(;;) { |
| if(U_SUCCESS(*err)) { |
| /* convert */ |
| toUnicode(pArgs, err); |
| |
| /* |
| * set a flag for whether the converter |
| * successfully processed the end of the input |
| * |
| * need not check cnv->preToULength==0 because a replay (<0) will cause |
| * s<sourceLimit before converterSawEndOfInput is checked |
| */ |
| converterSawEndOfInput= |
| (UBool)(U_SUCCESS(*err) && |
| pArgs->flush && pArgs->source==pArgs->sourceLimit && |
| cnv->toULength==0); |
| } else { |
| /* handle error from getNextUChar() or ucnv_convertEx() */ |
| converterSawEndOfInput=FALSE; |
| } |
| |
| /* no callback called yet for this iteration */ |
| calledCallback=FALSE; |
| |
| /* no sourceIndex adjustment for conversion, only for callback output */ |
| errorInputLength=0; |
| |
| /* |
| * loop for offsets and error handling |
| * |
| * iterates at most 3 times: |
| * 1. to clean up after the conversion function |
| * 2. after the callback |
| * 3. after the callback again if there was truncated input |
| */ |
| for(;;) { |
| /* update offsets if we write any */ |
| if(offsets!=NULL) { |
| int32_t length=(int32_t)(pArgs->target-t); |
| if(length>0) { |
| _updateOffsets(offsets, length, sourceIndex, errorInputLength); |
| |
| /* |
| * if a converter handles offsets and updates the offsets |
| * pointer at the end, then pArgs->offset should not change |
| * here; |
| * however, some converters do not handle offsets at all |
| * (sourceIndex<0) or may not update the offsets pointer |
| */ |
| pArgs->offsets=offsets+=length; |
| } |
| |
| if(sourceIndex>=0) { |
| sourceIndex+=(int32_t)(pArgs->source-s); |
| } |
| } |
| |
| if(cnv->preToULength<0) { |
| /* |
| * switch the source to new replay units (cannot occur while replaying) |
| * after offset handling and before end-of-input and callback handling |
| */ |
| if(realSource==NULL) { |
| realSource=pArgs->source; |
| realSourceLimit=pArgs->sourceLimit; |
| realFlush=pArgs->flush; |
| realSourceIndex=sourceIndex; |
| |
| uprv_memcpy(replay, cnv->preToU, -cnv->preToULength); |
| pArgs->source=replay; |
| pArgs->sourceLimit=replay-cnv->preToULength; |
| pArgs->flush=FALSE; |
| if((sourceIndex+=cnv->preToULength)<0) { |
| sourceIndex=-1; |
| } |
| |
| cnv->preToULength=0; |
| } else { |
| /* see implementation note before _fromUnicodeWithCallback() */ |
| U_ASSERT(realSource==NULL); |
| *err=U_INTERNAL_PROGRAM_ERROR; |
| } |
| } |
| |
| /* update pointers */ |
| s=pArgs->source; |
| t=pArgs->target; |
| |
| if(U_SUCCESS(*err)) { |
| if(s<pArgs->sourceLimit) { |
| /* |
| * continue with the conversion loop while there is still input left |
| * (continue converting by breaking out of only the inner loop) |
| */ |
| break; |
| } else if(realSource!=NULL) { |
| /* switch back from replaying to the real source and continue */ |
| pArgs->source=realSource; |
| pArgs->sourceLimit=realSourceLimit; |
| pArgs->flush=realFlush; |
| sourceIndex=realSourceIndex; |
| |
| realSource=NULL; |
| break; |
| } else if(pArgs->flush && cnv->toULength>0) { |
| /* |
| * the entire input stream is consumed |
| * and there is a partial, truncated input sequence left |
| */ |
| |
| /* inject an error and continue with callback handling */ |
| *err=U_TRUNCATED_CHAR_FOUND; |
| calledCallback=FALSE; /* new error condition */ |
| } else { |
| /* input consumed */ |
| if(pArgs->flush) { |
| /* |
| * return to the conversion loop once more if the flush |
| * flag is set and the conversion function has not |
| * successfully processed the end of the input yet |
| * |
| * (continue converting by breaking out of only the inner loop) |
| */ |
| if(!converterSawEndOfInput) { |
| break; |
| } |
| |
| /* reset the converter without calling the callback function */ |
| _reset(cnv, UCNV_RESET_TO_UNICODE, FALSE); |
| } |
| |
| /* done successfully */ |
| return; |
| } |
| } |
| |
| /* U_FAILURE(*err) */ |
| { |
| UErrorCode e; |
| |
| if( calledCallback || |
| (e=*err)==U_BUFFER_OVERFLOW_ERROR || |
| (e!=U_INVALID_CHAR_FOUND && |
| e!=U_ILLEGAL_CHAR_FOUND && |
| e!=U_TRUNCATED_CHAR_FOUND && |
| e!=U_ILLEGAL_ESCAPE_SEQUENCE && |
| e!=U_UNSUPPORTED_ESCAPE_SEQUENCE) |
| ) { |
| /* |
| * the callback did not or cannot resolve the error: |
| * set output pointers and return |
| * |
| * the check for buffer overflow is redundant but it is |
| * a high-runner case and hopefully documents the intent |
| * well |
| * |
| * if we were replaying, then the replay buffer must be |
| * copied back into the UConverter |
| * and the real arguments must be restored |
| */ |
| if(realSource!=NULL) { |
| int32_t length; |
| |
| U_ASSERT(cnv->preToULength==0); |
| |
| length=(int32_t)(pArgs->sourceLimit-pArgs->source); |
| if(length>0) { |
| uprv_memcpy(cnv->preToU, pArgs->source, length); |
| cnv->preToULength=(int8_t)-length; |
| } |
| |
| pArgs->source=realSource; |
| pArgs->sourceLimit=realSourceLimit; |
| pArgs->flush=realFlush; |
| } |
| |
| return; |
| } |
| } |
| |
| /* copy toUBytes[] to invalidCharBuffer[] */ |
| errorInputLength=cnv->invalidCharLength=cnv->toULength; |
| if(errorInputLength>0) { |
| uprv_memcpy(cnv->invalidCharBuffer, cnv->toUBytes, errorInputLength); |
| } |
| |
| /* set the converter state to deal with the next character */ |
| cnv->toULength=0; |
| |
| /* call the callback function */ |
| if(cnv->toUCallbackReason==UCNV_ILLEGAL && *err==U_INVALID_CHAR_FOUND) { |
| cnv->toUCallbackReason = UCNV_UNASSIGNED; |
| } |
| cnv->fromCharErrorBehaviour(cnv->toUContext, pArgs, |
| cnv->invalidCharBuffer, errorInputLength, |
| cnv->toUCallbackReason, |
| err); |
| cnv->toUCallbackReason = UCNV_ILLEGAL; /* reset to default value */ |
| |
| /* |
| * loop back to the offset handling |
| * |
| * this flag will indicate after offset handling |
| * that a callback was called; |
| * if the callback did not resolve the error, then we return |
| */ |
| calledCallback=TRUE; |
| } |
| } |
| } |
| |
| /* |
| * Output the toUnicode overflow buffer. |
| * Call this function if(cnv->UCharErrorBufferLength>0). |
| * @return TRUE if overflow |
| */ |
| static UBool |
| ucnv_outputOverflowToUnicode(UConverter *cnv, |
| UChar **target, const UChar *targetLimit, |
| int32_t **pOffsets, |
| UErrorCode *err) { |
| int32_t *offsets; |
| UChar *overflow, *t; |
| int32_t i, length; |
| |
| t=*target; |
| if(pOffsets!=NULL) { |
| offsets=*pOffsets; |
| } else { |
| offsets=NULL; |
| } |
| |
| overflow=cnv->UCharErrorBuffer; |
| length=cnv->UCharErrorBufferLength; |
| i=0; |
| while(i<length) { |
| if(t==targetLimit) { |
| /* the overflow buffer contains too much, keep the rest */ |
| int32_t j=0; |
| |
| do { |
| overflow[j++]=overflow[i++]; |
| } while(i<length); |
| |
| cnv->UCharErrorBufferLength=(int8_t)j; |
| *target=t; |
| if(offsets!=NULL) { |
| *pOffsets=offsets; |
| } |
| *err=U_BUFFER_OVERFLOW_ERROR; |
| return TRUE; |
| } |
| |
| /* copy the overflow contents to the target */ |
| *t++=overflow[i++]; |
| if(offsets!=NULL) { |
| *offsets++=-1; /* no source index available for old output */ |
| } |
| } |
| |
| /* the overflow buffer is completely copied to the target */ |
| cnv->UCharErrorBufferLength=0; |
| *target=t; |
| if(offsets!=NULL) { |
| *pOffsets=offsets; |
| } |
| return FALSE; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_toUnicode(UConverter *cnv, |
| UChar **target, const UChar *targetLimit, |
| const char **source, const char *sourceLimit, |
| int32_t *offsets, |
| UBool flush, |
| UErrorCode *err) { |
| UConverterToUnicodeArgs args; |
| const char *s; |
| UChar *t; |
| |
| /* check parameters */ |
| if(err==NULL || U_FAILURE(*err)) { |
| return; |
| } |
| |
| if(cnv==NULL || target==NULL || source==NULL) { |
| *err=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| s=*source; |
| t=*target; |
| |
| if ((const void *)U_MAX_PTR(targetLimit) == (const void *)targetLimit) { |
| /* |
| Prevent code from going into an infinite loop in case we do hit this |
| limit. The limit pointer is expected to be on a UChar * boundary. |
| This also prevents the next argument check from failing. |
| */ |
| targetLimit = (const UChar *)(((const char *)targetLimit) - 1); |
| } |
| |
| /* |
| * All these conditions should never happen. |
| * |
| * 1) Make sure that the limits are >= to the address source or target |
| * |
| * 2) Make sure that the buffer sizes do not exceed the number range for |
| * int32_t because some functions use the size (in units or bytes) |
| * rather than comparing pointers, and because offsets are int32_t values. |
| * |
| * size_t is guaranteed to be unsigned and large enough for the job. |
| * |
| * Return with an error instead of adjusting the limits because we would |
| * not be able to maintain the semantics that either the source must be |
| * consumed or the target filled (unless an error occurs). |
| * An adjustment would be sourceLimit=t+0x7fffffff; for example. |
| * |
| * 3) Make sure that the user didn't incorrectly cast a UChar * pointer |
| * to a char * pointer and provide an incomplete UChar code unit. |
| */ |
| if (sourceLimit<s || targetLimit<t || |
| ((size_t)(sourceLimit-s)>(size_t)0x7fffffff && sourceLimit>s) || |
| ((size_t)(targetLimit-t)>(size_t)0x3fffffff && targetLimit>t) || |
| (((const char *)targetLimit-(const char *)t) & 1) != 0 |
| ) { |
| *err=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| /* output the target overflow buffer */ |
| if( cnv->UCharErrorBufferLength>0 && |
| ucnv_outputOverflowToUnicode(cnv, target, targetLimit, &offsets, err) |
| ) { |
| /* U_BUFFER_OVERFLOW_ERROR */ |
| return; |
| } |
| /* *target may have moved, therefore stop using t */ |
| |
| if(!flush && s==sourceLimit && cnv->preToULength>=0) { |
| /* the overflow buffer is emptied and there is no new input: we are done */ |
| return; |
| } |
| |
| /* |
| * Do not simply return with a buffer overflow error if |
| * !flush && t==targetLimit |
| * because it is possible that the source will not generate any output. |
| * For example, the skip callback may be called; |
| * it does not output anything. |
| */ |
| |
| /* prepare the converter arguments */ |
| args.converter=cnv; |
| args.flush=flush; |
| args.offsets=offsets; |
| args.source=s; |
| args.sourceLimit=sourceLimit; |
| args.target=*target; |
| args.targetLimit=targetLimit; |
| args.size=sizeof(args); |
| |
| _toUnicodeWithCallback(&args, err); |
| |
| *source=args.source; |
| *target=args.target; |
| } |
| |
| /* ucnv_to/fromUChars() ----------------------------------------------------- */ |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_fromUChars(UConverter *cnv, |
| char *dest, int32_t destCapacity, |
| const UChar *src, int32_t srcLength, |
| UErrorCode *pErrorCode) { |
| const UChar *srcLimit; |
| char *originalDest, *destLimit; |
| int32_t destLength; |
| |
| /* check arguments */ |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| if( cnv==NULL || |
| destCapacity<0 || (destCapacity>0 && dest==NULL) || |
| srcLength<-1 || (srcLength!=0 && src==NULL) |
| ) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return 0; |
| } |
| |
| /* initialize */ |
| ucnv_resetFromUnicode(cnv); |
| originalDest=dest; |
| if(srcLength==-1) { |
| srcLength=u_strlen(src); |
| } |
| if(srcLength>0) { |
| srcLimit=src+srcLength; |
| destLimit=dest+destCapacity; |
| |
| /* pin the destination limit to U_MAX_PTR; NULL check is for OS/400 */ |
| if(destLimit<dest || (destLimit==NULL && dest!=NULL)) { |
| destLimit=(char *)U_MAX_PTR(dest); |
| } |
| |
| /* perform the conversion */ |
| ucnv_fromUnicode(cnv, &dest, destLimit, &src, srcLimit, 0, TRUE, pErrorCode); |
| destLength=(int32_t)(dest-originalDest); |
| |
| /* if an overflow occurs, then get the preflighting length */ |
| if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR) { |
| char buffer[1024]; |
| |
| destLimit=buffer+sizeof(buffer); |
| do { |
| dest=buffer; |
| *pErrorCode=U_ZERO_ERROR; |
| ucnv_fromUnicode(cnv, &dest, destLimit, &src, srcLimit, 0, TRUE, pErrorCode); |
| destLength+=(int32_t)(dest-buffer); |
| } while(*pErrorCode==U_BUFFER_OVERFLOW_ERROR); |
| } |
| } else { |
| destLength=0; |
| } |
| |
| return u_terminateChars(originalDest, destCapacity, destLength, pErrorCode); |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_toUChars(UConverter *cnv, |
| UChar *dest, int32_t destCapacity, |
| const char *src, int32_t srcLength, |
| UErrorCode *pErrorCode) { |
| const char *srcLimit; |
| UChar *originalDest, *destLimit; |
| int32_t destLength; |
| |
| /* check arguments */ |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| if( cnv==NULL || |
| destCapacity<0 || (destCapacity>0 && dest==NULL) || |
| srcLength<-1 || (srcLength!=0 && src==NULL)) |
| { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return 0; |
| } |
| |
| /* initialize */ |
| ucnv_resetToUnicode(cnv); |
| originalDest=dest; |
| if(srcLength==-1) { |
| srcLength=(int32_t)uprv_strlen(src); |
| } |
| if(srcLength>0) { |
| srcLimit=src+srcLength; |
| destLimit=dest+destCapacity; |
| |
| /* pin the destination limit to U_MAX_PTR; NULL check is for OS/400 */ |
| if(destLimit<dest || (destLimit==NULL && dest!=NULL)) { |
| destLimit=(UChar *)U_MAX_PTR(dest); |
| } |
| |
| /* perform the conversion */ |
| ucnv_toUnicode(cnv, &dest, destLimit, &src, srcLimit, 0, TRUE, pErrorCode); |
| destLength=(int32_t)(dest-originalDest); |
| |
| /* if an overflow occurs, then get the preflighting length */ |
| if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR) |
| { |
| UChar buffer[1024]; |
| |
| destLimit=buffer+sizeof(buffer)/U_SIZEOF_UCHAR; |
| do { |
| dest=buffer; |
| *pErrorCode=U_ZERO_ERROR; |
| ucnv_toUnicode(cnv, &dest, destLimit, &src, srcLimit, 0, TRUE, pErrorCode); |
| destLength+=(int32_t)(dest-buffer); |
| } |
| while(*pErrorCode==U_BUFFER_OVERFLOW_ERROR); |
| } |
| } else { |
| destLength=0; |
| } |
| |
| return u_terminateUChars(originalDest, destCapacity, destLength, pErrorCode); |
| } |
| |
| /* ucnv_getNextUChar() ------------------------------------------------------ */ |
| |
| U_CAPI UChar32 U_EXPORT2 |
| ucnv_getNextUChar(UConverter *cnv, |
| const char **source, const char *sourceLimit, |
| UErrorCode *err) { |
| UConverterToUnicodeArgs args; |
| UChar buffer[U16_MAX_LENGTH]; |
| const char *s; |
| UChar32 c; |
| int32_t i, length; |
| |
| /* check parameters */ |
| if(err==NULL || U_FAILURE(*err)) { |
| return 0xffff; |
| } |
| |
| if(cnv==NULL || source==NULL) { |
| *err=U_ILLEGAL_ARGUMENT_ERROR; |
| return 0xffff; |
| } |
| |
| s=*source; |
| if(sourceLimit<s) { |
| *err=U_ILLEGAL_ARGUMENT_ERROR; |
| return 0xffff; |
| } |
| |
| /* |
| * Make sure that the buffer sizes do not exceed the number range for |
| * int32_t because some functions use the size (in units or bytes) |
| * rather than comparing pointers, and because offsets are int32_t values. |
| * |
| * size_t is guaranteed to be unsigned and large enough for the job. |
| * |
| * Return with an error instead of adjusting the limits because we would |
| * not be able to maintain the semantics that either the source must be |
| * consumed or the target filled (unless an error occurs). |
| * An adjustment would be sourceLimit=t+0x7fffffff; for example. |
| */ |
| if(((size_t)(sourceLimit-s)>(size_t)0x7fffffff && sourceLimit>s)) { |
| *err=U_ILLEGAL_ARGUMENT_ERROR; |
| return 0xffff; |
| } |
| |
| c=U_SENTINEL; |
| |
| /* flush the target overflow buffer */ |
| if(cnv->UCharErrorBufferLength>0) { |
| UChar *overflow; |
| |
| overflow=cnv->UCharErrorBuffer; |
| i=0; |
| length=cnv->UCharErrorBufferLength; |
| U16_NEXT(overflow, i, length, c); |
| |
| /* move the remaining overflow contents up to the beginning */ |
| if((cnv->UCharErrorBufferLength=(int8_t)(length-i))>0) { |
| uprv_memmove(cnv->UCharErrorBuffer, cnv->UCharErrorBuffer+i, |
| cnv->UCharErrorBufferLength*U_SIZEOF_UCHAR); |
| } |
| |
| if(!U16_IS_LEAD(c) || i<length) { |
| return c; |
| } |
| /* |
| * Continue if the overflow buffer contained only a lead surrogate, |
| * in case the converter outputs single surrogates from complete |
| * input sequences. |
| */ |
| } |
| |
| /* |
| * flush==TRUE is implied for ucnv_getNextUChar() |
| * |
| * do not simply return even if s==sourceLimit because the converter may |
| * not have seen flush==TRUE before |
| */ |
| |
| /* prepare the converter arguments */ |
| args.converter=cnv; |
| args.flush=TRUE; |
| args.offsets=NULL; |
| args.source=s; |
| args.sourceLimit=sourceLimit; |
| args.target=buffer; |
| args.targetLimit=buffer+1; |
| args.size=sizeof(args); |
| |
| if(c<0) { |
| /* |
| * call the native getNextUChar() implementation if we are |
| * at a character boundary (toULength==0) |
| * |
| * unlike with _toUnicode(), getNextUChar() implementations must set |
| * U_TRUNCATED_CHAR_FOUND for truncated input, |
| * in addition to setting toULength/toUBytes[] |
| */ |
| if(cnv->toULength==0 && cnv->sharedData->impl->getNextUChar!=NULL) { |
| c=cnv->sharedData->impl->getNextUChar(&args, err); |
| *source=s=args.source; |
| if(*err==U_INDEX_OUTOFBOUNDS_ERROR) { |
| /* reset the converter without calling the callback function */ |
| _reset(cnv, UCNV_RESET_TO_UNICODE, FALSE); |
| return 0xffff; /* no output */ |
| } else if(U_SUCCESS(*err) && c>=0) { |
| return c; |
| /* |
| * else fall through to use _toUnicode() because |
| * UCNV_GET_NEXT_UCHAR_USE_TO_U: the native function did not want to handle it after all |
| * U_FAILURE: call _toUnicode() for callback handling (do not output c) |
| */ |
| } |
| } |
| |
| /* convert to one UChar in buffer[0], or handle getNextUChar() errors */ |
| _toUnicodeWithCallback(&args, err); |
| |
| if(*err==U_BUFFER_OVERFLOW_ERROR) { |
| *err=U_ZERO_ERROR; |
| } |
| |
| i=0; |
| length=(int32_t)(args.target-buffer); |
| } else { |
| /* write the lead surrogate from the overflow buffer */ |
| buffer[0]=(UChar)c; |
| args.target=buffer+1; |
| i=0; |
| length=1; |
| } |
| |
| /* buffer contents starts at i and ends before length */ |
| |
| if(U_FAILURE(*err)) { |
| c=0xffff; /* no output */ |
| } else if(length==0) { |
| /* no input or only state changes */ |
| *err=U_INDEX_OUTOFBOUNDS_ERROR; |
| /* no need to reset explicitly because _toUnicodeWithCallback() did it */ |
| c=0xffff; /* no output */ |
| } else { |
| c=buffer[0]; |
| i=1; |
| if(!U16_IS_LEAD(c)) { |
| /* consume c=buffer[0], done */ |
| } else { |
| /* got a lead surrogate, see if a trail surrogate follows */ |
| UChar c2; |
| |
| if(cnv->UCharErrorBufferLength>0) { |
| /* got overflow output from the conversion */ |
| if(U16_IS_TRAIL(c2=cnv->UCharErrorBuffer[0])) { |
| /* got a trail surrogate, too */ |
| c=U16_GET_SUPPLEMENTARY(c, c2); |
| |
| /* move the remaining overflow contents up to the beginning */ |
| if((--cnv->UCharErrorBufferLength)>0) { |
| uprv_memmove(cnv->UCharErrorBuffer, cnv->UCharErrorBuffer+1, |
| cnv->UCharErrorBufferLength*U_SIZEOF_UCHAR); |
| } |
| } else { |
| /* c is an unpaired lead surrogate, just return it */ |
| } |
| } else if(args.source<sourceLimit) { |
| /* convert once more, to buffer[1] */ |
| args.targetLimit=buffer+2; |
| _toUnicodeWithCallback(&args, err); |
| if(*err==U_BUFFER_OVERFLOW_ERROR) { |
| *err=U_ZERO_ERROR; |
| } |
| |
| length=(int32_t)(args.target-buffer); |
| if(U_SUCCESS(*err) && length==2 && U16_IS_TRAIL(c2=buffer[1])) { |
| /* got a trail surrogate, too */ |
| c=U16_GET_SUPPLEMENTARY(c, c2); |
| i=2; |
| } |
| } |
| } |
| } |
| |
| /* |
| * move leftover output from buffer[i..length[ |
| * into the beginning of the overflow buffer |
| */ |
| if(i<length) { |
| /* move further overflow back */ |
| int32_t delta=length-i; |
| if((length=cnv->UCharErrorBufferLength)>0) { |
| uprv_memmove(cnv->UCharErrorBuffer+delta, cnv->UCharErrorBuffer, |
| length*U_SIZEOF_UCHAR); |
| } |
| cnv->UCharErrorBufferLength=(int8_t)(length+delta); |
| |
| cnv->UCharErrorBuffer[0]=buffer[i++]; |
| if(delta>1) { |
| cnv->UCharErrorBuffer[1]=buffer[i]; |
| } |
| } |
| |
| *source=args.source; |
| return c; |
| } |
| |
| /* ucnv_convert() and siblings ---------------------------------------------- */ |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_convertEx(UConverter *targetCnv, UConverter *sourceCnv, |
| char **target, const char *targetLimit, |
| const char **source, const char *sourceLimit, |
| UChar *pivotStart, UChar **pivotSource, |
| UChar **pivotTarget, const UChar *pivotLimit, |
| UBool reset, UBool flush, |
| UErrorCode *pErrorCode) { |
| UChar pivotBuffer[CHUNK_SIZE]; |
| const UChar *myPivotSource; |
| UChar *myPivotTarget; |
| const char *s; |
| char *t; |
| |
| UConverterToUnicodeArgs toUArgs; |
| UConverterFromUnicodeArgs fromUArgs; |
| UConverterConvert convert; |
| |
| /* error checking */ |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return; |
| } |
| |
| if( targetCnv==NULL || sourceCnv==NULL || |
| source==NULL || *source==NULL || |
| target==NULL || *target==NULL || targetLimit==NULL |
| ) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| s=*source; |
| t=*target; |
| if((sourceLimit!=NULL && sourceLimit<s) || targetLimit<t) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| /* |
| * Make sure that the buffer sizes do not exceed the number range for |
| * int32_t. See ucnv_toUnicode() for a more detailed comment. |
| */ |
| if( |
| (sourceLimit!=NULL && ((size_t)(sourceLimit-s)>(size_t)0x7fffffff && sourceLimit>s)) || |
| ((size_t)(targetLimit-t)>(size_t)0x7fffffff && targetLimit>t) |
| ) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| if(pivotStart==NULL) { |
| if(!flush) { |
| /* streaming conversion requires an explicit pivot buffer */ |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| /* use the stack pivot buffer */ |
| myPivotSource=myPivotTarget=pivotStart=pivotBuffer; |
| pivotSource=(UChar **)&myPivotSource; |
| pivotTarget=&myPivotTarget; |
| pivotLimit=pivotBuffer+CHUNK_SIZE; |
| } else if( pivotStart>=pivotLimit || |
| pivotSource==NULL || *pivotSource==NULL || |
| pivotTarget==NULL || *pivotTarget==NULL || |
| pivotLimit==NULL |
| ) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| |
| if(sourceLimit==NULL) { |
| /* get limit of single-byte-NUL-terminated source string */ |
| sourceLimit=uprv_strchr(*source, 0); |
| } |
| |
| if(reset) { |
| ucnv_resetToUnicode(sourceCnv); |
| ucnv_resetFromUnicode(targetCnv); |
| *pivotSource=*pivotTarget=pivotStart; |
| } else if(targetCnv->charErrorBufferLength>0) { |
| /* output the targetCnv overflow buffer */ |
| if(ucnv_outputOverflowFromUnicode(targetCnv, target, targetLimit, NULL, pErrorCode)) { |
| /* U_BUFFER_OVERFLOW_ERROR */ |
| return; |
| } |
| /* *target has moved, therefore stop using t */ |
| |
| if( !flush && |
| targetCnv->preFromULength>=0 && *pivotSource==*pivotTarget && |
| sourceCnv->UCharErrorBufferLength==0 && sourceCnv->preToULength>=0 && s==sourceLimit |
| ) { |
| /* the fromUnicode overflow buffer is emptied and there is no new input: we are done */ |
| return; |
| } |
| } |
| |
| /* Is direct-UTF-8 conversion available? */ |
| if( sourceCnv->sharedData->staticData->conversionType==UCNV_UTF8 && |
| targetCnv->sharedData->impl->fromUTF8!=NULL |
| ) { |
| convert=targetCnv->sharedData->impl->fromUTF8; |
| } else if( targetCnv->sharedData->staticData->conversionType==UCNV_UTF8 && |
| sourceCnv->sharedData->impl->toUTF8!=NULL |
| ) { |
| convert=sourceCnv->sharedData->impl->toUTF8; |
| } else { |
| convert=NULL; |
| } |
| |
| /* |
| * If direct-UTF-8 conversion is available, then we use a smaller |
| * pivot buffer for error handling and partial matches |
| * so that we quickly return to direct conversion. |
| * |
| * 32 is large enough for UCNV_EXT_MAX_UCHARS and UCNV_ERROR_BUFFER_LENGTH. |
| * |
| * We could reduce the pivot buffer size further, at the cost of |
| * buffer overflows from callbacks. |
| * The pivot buffer should not be smaller than the maximum number of |
| * fromUnicode extension table input UChars |
| * (for m:n conversion, see |
| * targetCnv->sharedData->mbcs.extIndexes[UCNV_EXT_COUNT_UCHARS]) |
| * or 2 for surrogate pairs. |
| * |
| * Too small a buffer can cause thrashing between pivoting and direct |
| * conversion, with function call overhead outweighing the benefits |
| * of direct conversion. |
| */ |
| if(convert!=NULL && (pivotLimit-pivotStart)>32) { |
| pivotLimit=pivotStart+32; |
| } |
| |
| /* prepare the converter arguments */ |
| fromUArgs.converter=targetCnv; |
| fromUArgs.flush=FALSE; |
| fromUArgs.offsets=NULL; |
| fromUArgs.target=*target; |
| fromUArgs.targetLimit=targetLimit; |
| fromUArgs.size=sizeof(fromUArgs); |
| |
| toUArgs.converter=sourceCnv; |
| toUArgs.flush=flush; |
| toUArgs.offsets=NULL; |
| toUArgs.source=s; |
| toUArgs.sourceLimit=sourceLimit; |
| toUArgs.targetLimit=pivotLimit; |
| toUArgs.size=sizeof(toUArgs); |
| |
| /* |
| * TODO: Consider separating this function into two functions, |
| * extracting exactly the conversion loop, |
| * for readability and to reduce the set of visible variables. |
| * |
| * Otherwise stop using s and t from here on. |
| */ |
| s=t=NULL; |
| |
| /* |
| * conversion loop |
| * |
| * The sequence of steps in the loop may appear backward, |
| * but the principle is simple: |
| * In the chain of |
| * source - sourceCnv overflow - pivot - targetCnv overflow - target |
| * empty out later buffers before refilling them from earlier ones. |
| * |
| * The targetCnv overflow buffer is flushed out only once before the loop. |
| */ |
| for(;;) { |
| /* |
| * if(pivot not empty or error or replay or flush fromUnicode) { |
| * fromUnicode(pivot -> target); |
| * } |
| * |
| * For pivoting conversion; and for direct conversion for |
| * error callback handling and flushing the replay buffer. |
| */ |
| if( *pivotSource<*pivotTarget || |
| U_FAILURE(*pErrorCode) || |
| targetCnv->preFromULength<0 || |
| fromUArgs.flush |
| ) { |
| fromUArgs.source=*pivotSource; |
| fromUArgs.sourceLimit=*pivotTarget; |
| _fromUnicodeWithCallback(&fromUArgs, pErrorCode); |
| if(U_FAILURE(*pErrorCode)) { |
| /* target overflow, or conversion error */ |
| *pivotSource=(UChar *)fromUArgs.source; |
| break; |
| } |
| |
| /* |
| * _fromUnicodeWithCallback() must have consumed the pivot contents |
| * (*pivotSource==*pivotTarget) since it returned with U_SUCCESS() |
| */ |
| } |
| |
| /* The pivot buffer is empty; reset it so we start at pivotStart. */ |
| *pivotSource=*pivotTarget=pivotStart; |
| |
| /* |
| * if(sourceCnv overflow buffer not empty) { |
| * move(sourceCnv overflow buffer -> pivot); |
| * continue; |
| * } |
| */ |
| /* output the sourceCnv overflow buffer */ |
| if(sourceCnv->UCharErrorBufferLength>0) { |
| if(ucnv_outputOverflowToUnicode(sourceCnv, pivotTarget, pivotLimit, NULL, pErrorCode)) { |
| /* U_BUFFER_OVERFLOW_ERROR */ |
| *pErrorCode=U_ZERO_ERROR; |
| } |
| continue; |
| } |
| |
| /* |
| * check for end of input and break if done |
| * |
| * Checking both flush and fromUArgs.flush ensures that the converters |
| * have been called with the flush flag set if the ucnv_convertEx() |
| * caller set it. |
| */ |
| if( toUArgs.source==sourceLimit && |
| sourceCnv->preToULength>=0 && sourceCnv->toULength==0 && |
| (!flush || fromUArgs.flush) |
| ) { |
| /* done successfully */ |
| break; |
| } |
| |
| /* |
| * use direct conversion if available |
| * but not if continuing a partial match |
| * or flushing the toUnicode replay buffer |
| */ |
| if(convert!=NULL && targetCnv->preFromUFirstCP<0 && sourceCnv->preToULength==0) { |
| if(*pErrorCode==U_USING_DEFAULT_WARNING) { |
| /* remove a warning that may be set by this function */ |
| *pErrorCode=U_ZERO_ERROR; |
| } |
| convert(&fromUArgs, &toUArgs, pErrorCode); |
| if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR) { |
| break; |
| } else if(U_FAILURE(*pErrorCode)) { |
| if(sourceCnv->toULength>0) { |
| /* |
| * Fall through to calling _toUnicodeWithCallback() |
| * for callback handling. |
| * |
| * The pivot buffer will be reset with |
| * *pivotSource=*pivotTarget=pivotStart; |
| * which indicates a toUnicode error to the caller |
| * (*pivotSource==pivotStart shows no pivot UChars consumed). |
| */ |
| } else { |
| /* |
| * Indicate a fromUnicode error to the caller |
| * (*pivotSource>pivotStart shows some pivot UChars consumed). |
| */ |
| *pivotSource=*pivotTarget=pivotStart+1; |
| /* |
| * Loop around to calling _fromUnicodeWithCallbacks() |
| * for callback handling. |
| */ |
| continue; |
| } |
| } else if(*pErrorCode==U_USING_DEFAULT_WARNING) { |
| /* |
| * No error, but the implementation requested to temporarily |
| * fall back to pivoting. |
| */ |
| *pErrorCode=U_ZERO_ERROR; |
| /* |
| * The following else branches are almost identical to the end-of-input |
| * handling in _toUnicodeWithCallback(). |
| * Avoid calling it just for the end of input. |
| */ |
| } else if(flush && sourceCnv->toULength>0) { /* flush==toUArgs.flush */ |
| /* |
| * the entire input stream is consumed |
| * and there is a partial, truncated input sequence left |
| */ |
| |
| /* inject an error and continue with callback handling */ |
| *pErrorCode=U_TRUNCATED_CHAR_FOUND; |
| } else { |
| /* input consumed */ |
| if(flush) { |
| /* reset the converters without calling the callback functions */ |
| _reset(sourceCnv, UCNV_RESET_TO_UNICODE, FALSE); |
| _reset(targetCnv, UCNV_RESET_FROM_UNICODE, FALSE); |
| } |
| |
| /* done successfully */ |
| break; |
| } |
| } |
| |
| /* |
| * toUnicode(source -> pivot); |
| * |
| * For pivoting conversion; and for direct conversion for |
| * error callback handling, continuing partial matches |
| * and flushing the replay buffer. |
| * |
| * The pivot buffer is empty and reset. |
| */ |
| toUArgs.target=pivotStart; /* ==*pivotTarget */ |
| /* toUArgs.targetLimit=pivotLimit; already set before the loop */ |
| _toUnicodeWithCallback(&toUArgs, pErrorCode); |
| *pivotTarget=toUArgs.target; |
| if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR) { |
| /* pivot overflow: continue with the conversion loop */ |
| *pErrorCode=U_ZERO_ERROR; |
| } else if(U_FAILURE(*pErrorCode) || (!flush && *pivotTarget==pivotStart)) { |
| /* conversion error, or there was nothing left to convert */ |
| break; |
| } |
| /* |
| * else: |
| * _toUnicodeWithCallback() wrote into the pivot buffer, |
| * continue with fromUnicode conversion. |
| * |
| * Set the fromUnicode flush flag if we flush and if toUnicode has |
| * processed the end of the input. |
| */ |
| if( flush && toUArgs.source==sourceLimit && |
| sourceCnv->preToULength>=0 && |
| sourceCnv->UCharErrorBufferLength==0 |
| ) { |
| fromUArgs.flush=TRUE; |
| } |
| } |
| |
| /* |
| * The conversion loop is exited when one of the following is true: |
| * - the entire source text has been converted successfully to the target buffer |
| * - a target buffer overflow occurred |
| * - a conversion error occurred |
| */ |
| |
| *source=toUArgs.source; |
| *target=fromUArgs.target; |
| |
| /* terminate the target buffer if possible */ |
| if(flush && U_SUCCESS(*pErrorCode)) { |
| if(*target!=targetLimit) { |
| **target=0; |
| if(*pErrorCode==U_STRING_NOT_TERMINATED_WARNING) { |
| *pErrorCode=U_ZERO_ERROR; |
| } |
| } else { |
| *pErrorCode=U_STRING_NOT_TERMINATED_WARNING; |
| } |
| } |
| } |
| |
| /* internal implementation of ucnv_convert() etc. with preflighting */ |
| static int32_t |
| ucnv_internalConvert(UConverter *outConverter, UConverter *inConverter, |
| char *target, int32_t targetCapacity, |
| const char *source, int32_t sourceLength, |
| UErrorCode *pErrorCode) { |
| UChar pivotBuffer[CHUNK_SIZE]; |
| UChar *pivot, *pivot2; |
| |
| char *myTarget; |
| const char *sourceLimit; |
| const char *targetLimit; |
| int32_t targetLength=0; |
| |
| /* set up */ |
| if(sourceLength<0) { |
| sourceLimit=uprv_strchr(source, 0); |
| } else { |
| sourceLimit=source+sourceLength; |
| } |
| |
| /* if there is no input data, we're done */ |
| if(source==sourceLimit) { |
| return u_terminateChars(target, targetCapacity, 0, pErrorCode); |
| } |
| |
| pivot=pivot2=pivotBuffer; |
| myTarget=target; |
| targetLength=0; |
| |
| if(targetCapacity>0) { |
| /* perform real conversion */ |
| targetLimit=target+targetCapacity; |
| ucnv_convertEx(outConverter, inConverter, |
| &myTarget, targetLimit, |
| &source, sourceLimit, |
| pivotBuffer, &pivot, &pivot2, pivotBuffer+CHUNK_SIZE, |
| FALSE, |
| TRUE, |
| pErrorCode); |
| targetLength=(int32_t)(myTarget-target); |
| } |
| |
| /* |
| * If the output buffer is exhausted (or we are only "preflighting"), we need to stop writing |
| * to it but continue the conversion in order to store in targetCapacity |
| * the number of bytes that was required. |
| */ |
| if(*pErrorCode==U_BUFFER_OVERFLOW_ERROR || targetCapacity==0) |
| { |
| char targetBuffer[CHUNK_SIZE]; |
| |
| targetLimit=targetBuffer+CHUNK_SIZE; |
| do { |
| *pErrorCode=U_ZERO_ERROR; |
| myTarget=targetBuffer; |
| ucnv_convertEx(outConverter, inConverter, |
| &myTarget, targetLimit, |
| &source, sourceLimit, |
| pivotBuffer, &pivot, &pivot2, pivotBuffer+CHUNK_SIZE, |
| FALSE, |
| TRUE, |
| pErrorCode); |
| targetLength+=(int32_t)(myTarget-targetBuffer); |
| } while(*pErrorCode==U_BUFFER_OVERFLOW_ERROR); |
| |
| /* done with preflighting, set warnings and errors as appropriate */ |
| return u_terminateChars(target, targetCapacity, targetLength, pErrorCode); |
| } |
| |
| /* no need to call u_terminateChars() because ucnv_convertEx() took care of that */ |
| return targetLength; |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_convert(const char *toConverterName, const char *fromConverterName, |
| char *target, int32_t targetCapacity, |
| const char *source, int32_t sourceLength, |
| UErrorCode *pErrorCode) { |
| UConverter in, out; /* stack-allocated */ |
| UConverter *inConverter, *outConverter; |
| int32_t targetLength; |
| |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| if( source==NULL || sourceLength<-1 || |
| targetCapacity<0 || (targetCapacity>0 && target==NULL) |
| ) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return 0; |
| } |
| |
| /* if there is no input data, we're done */ |
| if(sourceLength==0 || (sourceLength<0 && *source==0)) { |
| return u_terminateChars(target, targetCapacity, 0, pErrorCode); |
| } |
| |
| /* create the converters */ |
| inConverter=ucnv_createConverter(&in, fromConverterName, pErrorCode); |
| if(U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| outConverter=ucnv_createConverter(&out, toConverterName, pErrorCode); |
| if(U_FAILURE(*pErrorCode)) { |
| ucnv_close(inConverter); |
| return 0; |
| } |
| |
| targetLength=ucnv_internalConvert(outConverter, inConverter, |
| target, targetCapacity, |
| source, sourceLength, |
| pErrorCode); |
| |
| ucnv_close(inConverter); |
| ucnv_close(outConverter); |
| |
| return targetLength; |
| } |
| |
| /* @internal */ |
| static int32_t |
| ucnv_convertAlgorithmic(UBool convertToAlgorithmic, |
| UConverterType algorithmicType, |
| UConverter *cnv, |
| char *target, int32_t targetCapacity, |
| const char *source, int32_t sourceLength, |
| UErrorCode *pErrorCode) { |
| UConverter algoConverterStatic; /* stack-allocated */ |
| UConverter *algoConverter, *to, *from; |
| int32_t targetLength; |
| |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| if( cnv==NULL || source==NULL || sourceLength<-1 || |
| targetCapacity<0 || (targetCapacity>0 && target==NULL) |
| ) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return 0; |
| } |
| |
| /* if there is no input data, we're done */ |
| if(sourceLength==0 || (sourceLength<0 && *source==0)) { |
| return u_terminateChars(target, targetCapacity, 0, pErrorCode); |
| } |
| |
| /* create the algorithmic converter */ |
| algoConverter=ucnv_createAlgorithmicConverter(&algoConverterStatic, algorithmicType, |
| "", 0, pErrorCode); |
| if(U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| /* reset the other converter */ |
| if(convertToAlgorithmic) { |
| /* cnv->Unicode->algo */ |
| ucnv_resetToUnicode(cnv); |
| to=algoConverter; |
| from=cnv; |
| } else { |
| /* algo->Unicode->cnv */ |
| ucnv_resetFromUnicode(cnv); |
| from=algoConverter; |
| to=cnv; |
| } |
| |
| targetLength=ucnv_internalConvert(to, from, |
| target, targetCapacity, |
| source, sourceLength, |
| pErrorCode); |
| |
| ucnv_close(algoConverter); |
| |
| return targetLength; |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_toAlgorithmic(UConverterType algorithmicType, |
| UConverter *cnv, |
| char *target, int32_t targetCapacity, |
| const char *source, int32_t sourceLength, |
| UErrorCode *pErrorCode) { |
| return ucnv_convertAlgorithmic(TRUE, algorithmicType, cnv, |
| target, targetCapacity, |
| source, sourceLength, |
| pErrorCode); |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_fromAlgorithmic(UConverter *cnv, |
| UConverterType algorithmicType, |
| char *target, int32_t targetCapacity, |
| const char *source, int32_t sourceLength, |
| UErrorCode *pErrorCode) { |
| return ucnv_convertAlgorithmic(FALSE, algorithmicType, cnv, |
| target, targetCapacity, |
| source, sourceLength, |
| pErrorCode); |
| } |
| |
| U_CAPI UConverterType U_EXPORT2 |
| ucnv_getType(const UConverter* converter) |
| { |
| int8_t type = converter->sharedData->staticData->conversionType; |
| #if !UCONFIG_NO_LEGACY_CONVERSION |
| if(type == UCNV_MBCS) { |
| return ucnv_MBCSGetType(converter); |
| } |
| #endif |
| return (UConverterType)type; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_getStarters(const UConverter* converter, |
| UBool starters[256], |
| UErrorCode* err) |
| { |
| if (err == NULL || U_FAILURE(*err)) { |
| return; |
| } |
| |
| if(converter->sharedData->impl->getStarters != NULL) { |
| converter->sharedData->impl->getStarters(converter, starters, err); |
| } else { |
| *err = U_ILLEGAL_ARGUMENT_ERROR; |
| } |
| } |
| |
| static const UAmbiguousConverter *ucnv_getAmbiguous(const UConverter *cnv) |
| { |
| UErrorCode errorCode; |
| const char *name; |
| int32_t i; |
| |
| if(cnv==NULL) { |
| return NULL; |
| } |
| |
| errorCode=U_ZERO_ERROR; |
| name=ucnv_getName(cnv, &errorCode); |
| if(U_FAILURE(errorCode)) { |
| return NULL; |
| } |
| |
| for(i=0; i<(int32_t)(sizeof(ambiguousConverters)/sizeof(UAmbiguousConverter)); ++i) |
| { |
| if(0==uprv_strcmp(name, ambiguousConverters[i].name)) |
| { |
| return ambiguousConverters+i; |
| } |
| } |
| |
| return NULL; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_fixFileSeparator(const UConverter *cnv, |
| UChar* source, |
| int32_t sourceLength) { |
| const UAmbiguousConverter *a; |
| int32_t i; |
| UChar variant5c; |
| |
| if(cnv==NULL || source==NULL || sourceLength<=0 || (a=ucnv_getAmbiguous(cnv))==NULL) |
| { |
| return; |
| } |
| |
| variant5c=a->variant5c; |
| for(i=0; i<sourceLength; ++i) { |
| if(source[i]==variant5c) { |
| source[i]=0x5c; |
| } |
| } |
| } |
| |
| U_CAPI UBool U_EXPORT2 |
| ucnv_isAmbiguous(const UConverter *cnv) { |
| return (UBool)(ucnv_getAmbiguous(cnv)!=NULL); |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_setFallback(UConverter *cnv, UBool usesFallback) |
| { |
| cnv->useFallback = usesFallback; |
| } |
| |
| U_CAPI UBool U_EXPORT2 |
| ucnv_usesFallback(const UConverter *cnv) |
| { |
| return cnv->useFallback; |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_getInvalidChars (const UConverter * converter, |
| char *errBytes, |
| int8_t * len, |
| UErrorCode * err) |
| { |
| if (err == NULL || U_FAILURE(*err)) |
| { |
| return; |
| } |
| if (len == NULL || errBytes == NULL || converter == NULL) |
| { |
| *err = U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| if (*len < converter->invalidCharLength) |
| { |
| *err = U_INDEX_OUTOFBOUNDS_ERROR; |
| return; |
| } |
| if ((*len = converter->invalidCharLength) > 0) |
| { |
| uprv_memcpy (errBytes, converter->invalidCharBuffer, *len); |
| } |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_getInvalidUChars (const UConverter * converter, |
| UChar *errChars, |
| int8_t * len, |
| UErrorCode * err) |
| { |
| if (err == NULL || U_FAILURE(*err)) |
| { |
| return; |
| } |
| if (len == NULL || errChars == NULL || converter == NULL) |
| { |
| *err = U_ILLEGAL_ARGUMENT_ERROR; |
| return; |
| } |
| if (*len < converter->invalidUCharLength) |
| { |
| *err = U_INDEX_OUTOFBOUNDS_ERROR; |
| return; |
| } |
| if ((*len = converter->invalidUCharLength) > 0) |
| { |
| uprv_memcpy (errChars, converter->invalidUCharBuffer, sizeof(UChar) * (*len)); |
| } |
| } |
| |
| #define SIG_MAX_LEN 5 |
| |
| U_CAPI const char* U_EXPORT2 |
| ucnv_detectUnicodeSignature( const char* source, |
| int32_t sourceLength, |
| int32_t* signatureLength, |
| UErrorCode* pErrorCode) { |
| int32_t dummy; |
| |
| /* initial 0xa5 bytes: make sure that if we read <SIG_MAX_LEN |
| * bytes we don't misdetect something |
| */ |
| char start[SIG_MAX_LEN]={ '\xa5', '\xa5', '\xa5', '\xa5', '\xa5' }; |
| int i = 0; |
| |
| if((pErrorCode==NULL) || U_FAILURE(*pErrorCode)){ |
| return NULL; |
| } |
| |
| if(source == NULL || sourceLength < -1){ |
| *pErrorCode = U_ILLEGAL_ARGUMENT_ERROR; |
| return NULL; |
| } |
| |
| if(signatureLength == NULL) { |
| signatureLength = &dummy; |
| } |
| |
| if(sourceLength==-1){ |
| sourceLength=(int32_t)uprv_strlen(source); |
| } |
| |
| |
| while(i<sourceLength&& i<SIG_MAX_LEN){ |
| start[i]=source[i]; |
| i++; |
| } |
| |
| if(start[0] == '\xFE' && start[1] == '\xFF') { |
| *signatureLength=2; |
| return "UTF-16BE"; |
| } else if(start[0] == '\xFF' && start[1] == '\xFE') { |
| if(start[2] == '\x00' && start[3] =='\x00') { |
| *signatureLength=4; |
| return "UTF-32LE"; |
| } else { |
| *signatureLength=2; |
| return "UTF-16LE"; |
| } |
| } else if(start[0] == '\xEF' && start[1] == '\xBB' && start[2] == '\xBF') { |
| *signatureLength=3; |
| return "UTF-8"; |
| } else if(start[0] == '\x00' && start[1] == '\x00' && |
| start[2] == '\xFE' && start[3]=='\xFF') { |
| *signatureLength=4; |
| return "UTF-32BE"; |
| } else if(start[0] == '\x0E' && start[1] == '\xFE' && start[2] == '\xFF') { |
| *signatureLength=3; |
| return "SCSU"; |
| } else if(start[0] == '\xFB' && start[1] == '\xEE' && start[2] == '\x28') { |
| *signatureLength=3; |
| return "BOCU-1"; |
| } else if(start[0] == '\x2B' && start[1] == '\x2F' && start[2] == '\x76') { |
| /* |
| * UTF-7: Initial U+FEFF is encoded as +/v8 or +/v9 or +/v+ or +/v/ |
| * depending on the second UTF-16 code unit. |
| * Detect the entire, closed Unicode mode sequence +/v8- for only U+FEFF |
| * if it occurs. |
| * |
| * So far we have +/v |
| */ |
| if(start[3] == '\x38' && start[4] == '\x2D') { |
| /* 5 bytes +/v8- */ |
| *signatureLength=5; |
| return "UTF-7"; |
| } else if(start[3] == '\x38' || start[3] == '\x39' || start[3] == '\x2B' || start[3] == '\x2F') { |
| /* 4 bytes +/v8 or +/v9 or +/v+ or +/v/ */ |
| *signatureLength=4; |
| return "UTF-7"; |
| } |
| }else if(start[0]=='\xDD' && start[1]== '\x73'&& start[2]=='\x66' && start[3]=='\x73'){ |
| *signatureLength=4; |
| return "UTF-EBCDIC"; |
| } |
| |
| |
| /* no known Unicode signature byte sequence recognized */ |
| *signatureLength=0; |
| return NULL; |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_fromUCountPending(const UConverter* cnv, UErrorCode* status) |
| { |
| if(status == NULL || U_FAILURE(*status)){ |
| return -1; |
| } |
| if(cnv == NULL){ |
| *status = U_ILLEGAL_ARGUMENT_ERROR; |
| return -1; |
| } |
| |
| if(cnv->preFromUFirstCP >= 0){ |
| return U16_LENGTH(cnv->preFromUFirstCP)+cnv->preFromULength ; |
| }else if(cnv->preFromULength < 0){ |
| return -cnv->preFromULength ; |
| }else if(cnv->fromUChar32 > 0){ |
| return 1; |
| } |
| return 0; |
| |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_toUCountPending(const UConverter* cnv, UErrorCode* status){ |
| |
| if(status == NULL || U_FAILURE(*status)){ |
| return -1; |
| } |
| if(cnv == NULL){ |
| *status = U_ILLEGAL_ARGUMENT_ERROR; |
| return -1; |
| } |
| |
| if(cnv->preToULength > 0){ |
| return cnv->preToULength ; |
| }else if(cnv->preToULength < 0){ |
| return -cnv->preToULength; |
| }else if(cnv->toULength > 0){ |
| return cnv->toULength; |
| } |
| return 0; |
| } |
| |
| U_CAPI UBool U_EXPORT2 |
| ucnv_isFixedWidth(UConverter *cnv, UErrorCode *status){ |
| if (U_FAILURE(*status)) { |
| return FALSE; |
| } |
| |
| if (cnv == NULL) { |
| *status = U_ILLEGAL_ARGUMENT_ERROR; |
| return FALSE; |
| } |
| |
| switch (ucnv_getType(cnv)) { |
| case UCNV_SBCS: |
| case UCNV_DBCS: |
| case UCNV_UTF32_BigEndian: |
| case UCNV_UTF32_LittleEndian: |
| case UCNV_UTF32: |
| case UCNV_US_ASCII: |
| return TRUE; |
| default: |
| return FALSE; |
| } |
| } |
| #endif |
| |
| /* |
| * Hey, Emacs, please set the following: |
| * |
| * Local Variables: |
| * indent-tabs-mode: nil |
| * End: |
| * |
| */ |