// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ********************************************************************** * Copyright (C) 1999-2014, International Business Machines * Corporation and others. All Rights Reserved. ********************************************************************** * ucnv.h: * External APIs for the ICU's codeset conversion library * Bertrand A. Damiba * * Modification History: * * Date Name Description * 04/04/99 helena Fixed internal header inclusion. * 05/11/00 helena Added setFallback and usesFallback APIs. * 06/29/2000 helena Major rewrite of the callback APIs. * 12/07/2000 srl Update of documentation */ /** * \file * \brief C API: Character conversion * * <h2>Character Conversion C API</h2> * * <p>This API is used to convert codepage or character encoded data to and * from UTF-16. You can open a converter with {@link ucnv_open() }. With that * converter, you can get its properties, set options, convert your data and * close the converter.</p> * * <p>Since many software programs recognize different converter names for * different types of converters, there are other functions in this API to * iterate over the converter aliases. The functions {@link ucnv_getAvailableName() }, * {@link ucnv_getAlias() } and {@link ucnv_getStandardName() } are some of the * more frequently used alias functions to get this information.</p> * * <p>When a converter encounters an illegal, irregular, invalid or unmappable character * its default behavior is to use a substitution character to replace the * bad byte sequence. This behavior can be changed by using {@link ucnv_setFromUCallBack() } * or {@link ucnv_setToUCallBack() } on the converter. The header ucnv_err.h defines * many other callback actions that can be used instead of a character substitution.</p> * * <p>More information about this API can be found in our * <a href="https://unicode-org.github.io/icu/userguide/conversion/">User Guide</a>.</p> */ #ifndef UCNV_H #define UCNV_H #include "unicode/ucnv_err.h" #include "unicode/uenum.h" #if U_SHOW_CPLUSPLUS_API #include "unicode/localpointer.h" #endif // U_SHOW_CPLUSPLUS_API #if !defined(USET_DEFINED) && !defined(U_IN_DOXYGEN) #define USET_DEFINED /** * USet is the C API type corresponding to C++ class UnicodeSet. * It is forward-declared here to avoid including unicode/uset.h file if related * conversion APIs are not used. * * @see ucnv_getUnicodeSet * @stable ICU 2.4 */ typedef struct USet USet; #endif #if !UCONFIG_NO_CONVERSION U_CDECL_BEGIN /** Maximum length of a converter name including the terminating NULL @stable ICU 2.0 */ #define UCNV_MAX_CONVERTER_NAME_LENGTH … /** Maximum length of a converter name including path and terminating NULL @stable ICU 2.0 */ #define UCNV_MAX_FULL_FILE_NAME_LENGTH … /** Shift in for EBDCDIC_STATEFUL and iso2022 states @stable ICU 2.0 */ #define UCNV_SI … /** Shift out for EBDCDIC_STATEFUL and iso2022 states @stable ICU 2.0 */ #define UCNV_SO … /** * Enum for specifying basic types of converters * @see ucnv_getType * @stable ICU 2.0 */ typedef enum { /** @stable ICU 2.0 */ UCNV_UNSUPPORTED_CONVERTER = -1, /** @stable ICU 2.0 */ UCNV_SBCS = 0, /** @stable ICU 2.0 */ UCNV_DBCS = 1, /** @stable ICU 2.0 */ UCNV_MBCS = 2, /** @stable ICU 2.0 */ UCNV_LATIN_1 = 3, /** @stable ICU 2.0 */ UCNV_UTF8 = 4, /** @stable ICU 2.0 */ UCNV_UTF16_BigEndian = 5, /** @stable ICU 2.0 */ UCNV_UTF16_LittleEndian = 6, /** @stable ICU 2.0 */ UCNV_UTF32_BigEndian = 7, /** @stable ICU 2.0 */ UCNV_UTF32_LittleEndian = 8, /** @stable ICU 2.0 */ UCNV_EBCDIC_STATEFUL = 9, /** @stable ICU 2.0 */ UCNV_ISO_2022 = 10, /** @stable ICU 2.0 */ UCNV_LMBCS_1 = 11, /** @stable ICU 2.0 */ UCNV_LMBCS_2, /** @stable ICU 2.0 */ UCNV_LMBCS_3, /** @stable ICU 2.0 */ UCNV_LMBCS_4, /** @stable ICU 2.0 */ UCNV_LMBCS_5, /** @stable ICU 2.0 */ UCNV_LMBCS_6, /** @stable ICU 2.0 */ UCNV_LMBCS_8, /** @stable ICU 2.0 */ UCNV_LMBCS_11, /** @stable ICU 2.0 */ UCNV_LMBCS_16, /** @stable ICU 2.0 */ UCNV_LMBCS_17, /** @stable ICU 2.0 */ UCNV_LMBCS_18, /** @stable ICU 2.0 */ UCNV_LMBCS_19, /** @stable ICU 2.0 */ UCNV_LMBCS_LAST = UCNV_LMBCS_19, /** @stable ICU 2.0 */ UCNV_HZ, /** @stable ICU 2.0 */ UCNV_SCSU, /** @stable ICU 2.0 */ UCNV_ISCII, /** @stable ICU 2.0 */ UCNV_US_ASCII, /** @stable ICU 2.0 */ UCNV_UTF7, /** @stable ICU 2.2 */ UCNV_BOCU1, /** @stable ICU 2.2 */ UCNV_UTF16, /** @stable ICU 2.2 */ UCNV_UTF32, /** @stable ICU 2.2 */ UCNV_CESU8, /** @stable ICU 2.4 */ UCNV_IMAP_MAILBOX, /** @stable ICU 4.8 */ UCNV_COMPOUND_TEXT, /* Number of converter types for which we have conversion routines. */ UCNV_NUMBER_OF_SUPPORTED_CONVERTER_TYPES } UConverterType; /** * Enum for specifying which platform a converter ID refers to. * The use of platform/CCSID is not recommended. See ucnv_openCCSID(). * * @see ucnv_getPlatform * @see ucnv_openCCSID * @see ucnv_getCCSID * @stable ICU 2.0 */ typedef enum { UCNV_UNKNOWN = -1, UCNV_IBM = 0 } UConverterPlatform; /** * Function pointer for error callback in the codepage to unicode direction. * Called when an error has occurred in conversion to unicode, or on open/close of the callback (see reason). * @param context Pointer to the callback's private data * @param args Information about the conversion in progress * @param codeUnits Points to 'length' bytes of the concerned codepage sequence * @param length Size (in bytes) of the concerned codepage sequence * @param reason Defines the reason the callback was invoked * @param pErrorCode ICU error code in/out parameter. * For converter callback functions, set to a conversion error * before the call, and the callback may reset it to U_ZERO_ERROR. * @see ucnv_setToUCallBack * @see UConverterToUnicodeArgs * @stable ICU 2.0 */ typedef void (U_EXPORT2 *UConverterToUCallback) ( const void* context, UConverterToUnicodeArgs *args, const char *codeUnits, int32_t length, UConverterCallbackReason reason, UErrorCode *pErrorCode); /** * Function pointer for error callback in the unicode to codepage direction. * Called when an error has occurred in conversion from unicode, or on open/close of the callback (see reason). * @param context Pointer to the callback's private data * @param args Information about the conversion in progress * @param codeUnits Points to 'length' UChars of the concerned Unicode sequence * @param length Size (in bytes) of the concerned codepage sequence * @param codePoint Single UChar32 (UTF-32) containing the concerend Unicode codepoint. * @param reason Defines the reason the callback was invoked * @param pErrorCode ICU error code in/out parameter. * For converter callback functions, set to a conversion error * before the call, and the callback may reset it to U_ZERO_ERROR. * @see ucnv_setFromUCallBack * @stable ICU 2.0 */ typedef void (U_EXPORT2 *UConverterFromUCallback) ( const void* context, UConverterFromUnicodeArgs *args, const UChar* codeUnits, int32_t length, UChar32 codePoint, UConverterCallbackReason reason, UErrorCode *pErrorCode); U_CDECL_END /** * Character that separates converter names from options and options from each other. * @see ucnv_open * @stable ICU 2.0 */ #define UCNV_OPTION_SEP_CHAR … /** * String version of UCNV_OPTION_SEP_CHAR. * @see ucnv_open * @stable ICU 2.0 */ #define UCNV_OPTION_SEP_STRING … /** * Character that separates a converter option from its value. * @see ucnv_open * @stable ICU 2.0 */ #define UCNV_VALUE_SEP_CHAR … /** * String version of UCNV_VALUE_SEP_CHAR. * @see ucnv_open * @stable ICU 2.0 */ #define UCNV_VALUE_SEP_STRING … /** * Converter option for specifying a locale. * For example, ucnv_open("SCSU,locale=ja", &errorCode); * See convrtrs.txt. * * @see ucnv_open * @stable ICU 2.0 */ #define UCNV_LOCALE_OPTION_STRING … /** * Converter option for specifying a version selector (0..9) for some converters. * For example, * \code * ucnv_open("UTF-7,version=1", &errorCode); * \endcode * See convrtrs.txt. * * @see ucnv_open * @stable ICU 2.4 */ #define UCNV_VERSION_OPTION_STRING … /** * Converter option for EBCDIC SBCS or mixed-SBCS/DBCS (stateful) codepages. * Swaps Unicode mappings for EBCDIC LF and NL codes, as used on * S/390 (z/OS) Unix System Services (Open Edition). * For example, ucnv_open("ibm-1047,swaplfnl", &errorCode); * See convrtrs.txt. * * @see ucnv_open * @stable ICU 2.4 */ #define UCNV_SWAP_LFNL_OPTION_STRING … /** * Do a fuzzy compare of two converter/alias names. * The comparison is case-insensitive, ignores leading zeroes if they are not * followed by further digits, and ignores all but letters and digits. * Thus the strings "UTF-8", "utf_8", "u*T@f08" and "Utf 8" are exactly equivalent. * See section 1.4, Charset Alias Matching in Unicode Technical Standard #22 * at http://www.unicode.org/reports/tr22/ * * @param name1 a converter name or alias, zero-terminated * @param name2 a converter name or alias, zero-terminated * @return 0 if the names match, or a negative value if the name1 * lexically precedes name2, or a positive value if the name1 * lexically follows name2. * @stable ICU 2.0 */ U_CAPI int U_EXPORT2 ucnv_compareNames(const char *name1, const char *name2); /** * Creates a UConverter object with the name of a coded character set specified as a C string. * The actual name will be resolved with the alias file * using a case-insensitive string comparison that ignores * leading zeroes and all non-alphanumeric characters. * E.g., the names "UTF8", "utf-8", "u*T@f08" and "Utf 8" are all equivalent. * (See also ucnv_compareNames().) * If <code>NULL</code> is passed for the converter name, it will create one with the * getDefaultName return value. * * <p>A converter name for ICU 1.5 and above may contain options * like a locale specification to control the specific behavior of * the newly instantiated converter. * The meaning of the options depends on the particular converter. * If an option is not defined for or recognized by a given converter, then it is ignored.</p> * * <p>Options are appended to the converter name string, with a * <code>UCNV_OPTION_SEP_CHAR</code> between the name and the first option and * also between adjacent options.</p> * * <p>If the alias is ambiguous, then the preferred converter is used * and the status is set to U_AMBIGUOUS_ALIAS_WARNING.</p> * * <p>The conversion behavior and names can vary between platforms. ICU may * convert some characters differently from other platforms. Details on this topic * are in the <a href="https://unicode-org.github.io/icu/userguide/conversion/">User * Guide</a>. Aliases starting with a "cp" prefix have no specific meaning * other than its an alias starting with the letters "cp". Please do not * associate any meaning to these aliases.</p> * * @param converterName Name of the coded character set table. * This may have options appended to the string. * IANA alias character set names, IBM CCSIDs starting with "ibm-", * Windows codepage numbers starting with "windows-" are frequently * used for this parameter. See ucnv_getAvailableName and * ucnv_getAlias for a complete list that is available. * If this parameter is NULL, the default converter will be used. * @param err outgoing error status <TT>U_MEMORY_ALLOCATION_ERROR, U_FILE_ACCESS_ERROR</TT> * @return the created Unicode converter object, or <TT>NULL</TT> if an error occurred * @see ucnv_openU * @see ucnv_openCCSID * @see ucnv_getAvailableName * @see ucnv_getAlias * @see ucnv_getDefaultName * @see ucnv_close * @see ucnv_compareNames * @stable ICU 2.0 */ U_CAPI UConverter* U_EXPORT2 ucnv_open(const char *converterName, UErrorCode *err); /** * Creates a Unicode converter with the names specified as unicode string. * The name should be limited to the ASCII-7 alphanumerics range. * The actual name will be resolved with the alias file * using a case-insensitive string comparison that ignores * leading zeroes and all non-alphanumeric characters. * E.g., the names "UTF8", "utf-8", "u*T@f08" and "Utf 8" are all equivalent. * (See also ucnv_compareNames().) * If <TT>NULL</TT> is passed for the converter name, it will create * one with the ucnv_getDefaultName() return value. * If the alias is ambiguous, then the preferred converter is used * and the status is set to U_AMBIGUOUS_ALIAS_WARNING. * * <p>See ucnv_open for the complete details</p> * @param name Name of the UConverter table in a zero terminated * Unicode string * @param err outgoing error status <TT>U_MEMORY_ALLOCATION_ERROR, * U_FILE_ACCESS_ERROR</TT> * @return the created Unicode converter object, or <TT>NULL</TT> if an * error occurred * @see ucnv_open * @see ucnv_openCCSID * @see ucnv_close * @see ucnv_compareNames * @stable ICU 2.0 */ U_CAPI UConverter* U_EXPORT2 ucnv_openU(const UChar *name, UErrorCode *err); /** * Creates a UConverter object from a CCSID number and platform pair. * Note that the usefulness of this function is limited to platforms with numeric * encoding IDs. Only IBM and Microsoft platforms use numeric (16-bit) identifiers for * encodings. * * In addition, IBM CCSIDs and Unicode conversion tables are not 1:1 related. * For many IBM CCSIDs there are multiple (up to six) Unicode conversion tables, and * for some Unicode conversion tables there are multiple CCSIDs. * Some "alternate" Unicode conversion tables are provided by the * IBM CDRA conversion table registry. * The most prominent example of a systematic modification of conversion tables that is * not provided in the form of conversion table files in the repository is * that S/390 Unix System Services swaps the codes for Line Feed and New Line in all * EBCDIC codepages, which requires such a swap in the Unicode conversion tables as well. * * Only IBM default conversion tables are accessible with ucnv_openCCSID(). * ucnv_getCCSID() will return the same CCSID for all conversion tables that are associated * with that CCSID. * * Currently, the only "platform" supported in the ICU converter API is UCNV_IBM. * * In summary, the use of CCSIDs and the associated API functions is not recommended. * * In order to open a converter with the default IBM CDRA Unicode conversion table, * you can use this function or use the prefix "ibm-": * \code * char name[20]; * sprintf(name, "ibm-%hu", ccsid); * cnv=ucnv_open(name, &errorCode); * \endcode * * In order to open a converter with the IBM S/390 Unix System Services variant * of a Unicode/EBCDIC conversion table, * you can use the prefix "ibm-" together with the option string UCNV_SWAP_LFNL_OPTION_STRING: * \code * char name[20]; * sprintf(name, "ibm-%hu" UCNV_SWAP_LFNL_OPTION_STRING, ccsid); * cnv=ucnv_open(name, &errorCode); * \endcode * * In order to open a converter from a Microsoft codepage number, use the prefix "cp": * \code * char name[20]; * sprintf(name, "cp%hu", codepageID); * cnv=ucnv_open(name, &errorCode); * \endcode * * If the alias is ambiguous, then the preferred converter is used * and the status is set to U_AMBIGUOUS_ALIAS_WARNING. * * @param codepage codepage number to create * @param platform the platform in which the codepage number exists * @param err error status <TT>U_MEMORY_ALLOCATION_ERROR, U_FILE_ACCESS_ERROR</TT> * @return the created Unicode converter object, or <TT>NULL</TT> if an error * occurred. * @see ucnv_open * @see ucnv_openU * @see ucnv_close * @see ucnv_getCCSID * @see ucnv_getPlatform * @see UConverterPlatform * @stable ICU 2.0 */ U_CAPI UConverter* U_EXPORT2 ucnv_openCCSID(int32_t codepage, UConverterPlatform platform, UErrorCode * err); /** * <p>Creates a UConverter object specified from a packageName and a converterName.</p> * * <p>The packageName and converterName must point to an ICU udata object, as defined by * <code> udata_open( packageName, "cnv", converterName, err) </code> or equivalent. * Typically, packageName will refer to a (.dat) file, or to a package registered with * udata_setAppData(). Using a full file or directory pathname for packageName is deprecated.</p> * * <p>The name will NOT be looked up in the alias mechanism, nor will the converter be * stored in the converter cache or the alias table. The only way to open further converters * is call this function multiple times, or use the ucnv_clone() function to clone a * 'primary' converter.</p> * * <p>A future version of ICU may add alias table lookups and/or caching * to this function.</p> * * <p>Example Use: * <code>cnv = ucnv_openPackage("myapp", "myconverter", &err);</code> * </p> * * @param packageName name of the package (equivalent to 'path' in udata_open() call) * @param converterName name of the data item to be used, without suffix. * @param err outgoing error status <TT>U_MEMORY_ALLOCATION_ERROR, U_FILE_ACCESS_ERROR</TT> * @return the created Unicode converter object, or <TT>NULL</TT> if an error occurred * @see udata_open * @see ucnv_open * @see ucnv_clone * @see ucnv_close * @stable ICU 2.2 */ U_CAPI UConverter* U_EXPORT2 ucnv_openPackage(const char *packageName, const char *converterName, UErrorCode *err); /** * Thread safe converter cloning operation. * * You must ucnv_close() the clone. * * @param cnv converter to be cloned * @param status to indicate whether the operation went on smoothly or there were errors * @return pointer to the new clone * @stable ICU 71 */ U_CAPI UConverter* U_EXPORT2 ucnv_clone(const UConverter *cnv, UErrorCode *status); #ifndef U_HIDE_DEPRECATED_API /** * Thread safe converter cloning operation. * For most efficient operation, pass in a stackBuffer (and a *pBufferSize) * with at least U_CNV_SAFECLONE_BUFFERSIZE bytes of space. * If the buffer size is sufficient, then the clone will use the stack buffer; * otherwise, it will be allocated, and *pBufferSize will indicate * the actual size. (This should not occur with U_CNV_SAFECLONE_BUFFERSIZE.) * * You must ucnv_close() the clone in any case. * * If *pBufferSize==0, (regardless of whether stackBuffer==NULL or not) * then *pBufferSize will be changed to a sufficient size * for cloning this converter, * without actually cloning the converter ("pure pre-flighting"). * * If *pBufferSize is greater than zero but not large enough for a stack-based * clone, then the converter is cloned using newly allocated memory * and *pBufferSize is changed to the necessary size. * * If the converter clone fits into the stack buffer but the stack buffer is not * sufficiently aligned for the clone, then the clone will use an * adjusted pointer and use an accordingly smaller buffer size. * * @param cnv converter to be cloned * @param stackBuffer <em>Deprecated functionality as of ICU 52, use NULL.</em><br> * user allocated space for the new clone. If NULL new memory will be allocated. * If buffer is not large enough, new memory will be allocated. * Clients can use the U_CNV_SAFECLONE_BUFFERSIZE. This will probably be enough to avoid memory allocations. * @param pBufferSize <em>Deprecated functionality as of ICU 52, use NULL or 1.</em><br> * pointer to size of allocated space. * @param status to indicate whether the operation went on smoothly or there were errors * An informational status value, U_SAFECLONE_ALLOCATED_WARNING, * is used if pBufferSize != NULL and any allocations were necessary * However, it is better to check if *pBufferSize grew for checking for * allocations because warning codes can be overridden by subsequent * function calls. * @return pointer to the new clone * @deprecated ICU 71 Use ucnv_clone() instead. */ U_DEPRECATED UConverter * U_EXPORT2 ucnv_safeClone(const UConverter *cnv, void *stackBuffer, int32_t *pBufferSize, UErrorCode *status); /** * \def U_CNV_SAFECLONE_BUFFERSIZE * Definition of a buffer size that is designed to be large enough for * converters to be cloned with ucnv_safeClone(). * @deprecated ICU 52. Do not rely on ucnv_safeClone() cloning into any provided buffer. */ #define U_CNV_SAFECLONE_BUFFERSIZE … #endif /* U_HIDE_DEPRECATED_API */ /** * Deletes the unicode converter and releases resources associated * with just this instance. * Does not free up shared converter tables. * * @param converter the converter object to be deleted * @see ucnv_open * @see ucnv_openU * @see ucnv_openCCSID * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_close(UConverter * converter); #if U_SHOW_CPLUSPLUS_API U_NAMESPACE_BEGIN /** * \class LocalUConverterPointer * "Smart pointer" class, closes a UConverter via ucnv_close(). * For most methods see the LocalPointerBase base class. * * @see LocalPointerBase * @see LocalPointer * @stable ICU 4.4 */ U_DEFINE_LOCAL_OPEN_POINTER(LocalUConverterPointer, UConverter, ucnv_close); U_NAMESPACE_END #endif /** * Fills in the output parameter, subChars, with the substitution characters * as multiple bytes. * If ucnv_setSubstString() set a Unicode string because the converter is * stateful, then subChars will be an empty string. * * @param converter the Unicode converter * @param subChars the substitution characters * @param len on input the capacity of subChars, on output the number * of bytes copied to it * @param err the outgoing error status code. * If the substitution character array is too small, an * <TT>U_INDEX_OUTOFBOUNDS_ERROR</TT> will be returned. * @see ucnv_setSubstString * @see ucnv_setSubstChars * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_getSubstChars(const UConverter *converter, char *subChars, int8_t *len, UErrorCode *err); /** * Sets the substitution chars when converting from unicode to a codepage. The * substitution is specified as a string of 1-4 bytes, and may contain * <TT>NULL</TT> bytes. * The subChars must represent a single character. The caller needs to know the * byte sequence of a valid character in the converter's charset. * For some converters, for example some ISO 2022 variants, only single-byte * substitution characters may be supported. * The newer ucnv_setSubstString() function relaxes these limitations. * * @param converter the Unicode converter * @param subChars the substitution character byte sequence we want set * @param len the number of bytes in subChars * @param err the error status code. <TT>U_INDEX_OUTOFBOUNDS_ERROR </TT> if * len is bigger than the maximum number of bytes allowed in subchars * @see ucnv_setSubstString * @see ucnv_getSubstChars * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_setSubstChars(UConverter *converter, const char *subChars, int8_t len, UErrorCode *err); /** * Set a substitution string for converting from Unicode to a charset. * The caller need not know the charset byte sequence for each charset. * * Unlike ucnv_setSubstChars() which is designed to set a charset byte sequence * for a single character, this function takes a Unicode string with * zero, one or more characters, and immediately verifies that the string can be * converted to the charset. * If not, or if the result is too long (more than 32 bytes as of ICU 3.6), * then the function returns with an error accordingly. * * Also unlike ucnv_setSubstChars(), this function works for stateful charsets * by converting on the fly at the point of substitution rather than setting * a fixed byte sequence. * * @param cnv The UConverter object. * @param s The Unicode string. * @param length The number of UChars in s, or -1 for a NUL-terminated string. * @param err Pointer to a standard ICU error code. Its input value must * pass the U_SUCCESS() test, or else the function returns * immediately. Check for U_FAILURE() on output or use with * function chaining. (See User Guide for details.) * * @see ucnv_setSubstChars * @see ucnv_getSubstChars * @stable ICU 3.6 */ U_CAPI void U_EXPORT2 ucnv_setSubstString(UConverter *cnv, const UChar *s, int32_t length, UErrorCode *err); /** * Fills in the output parameter, errBytes, with the error characters from the * last failing conversion. * * @param converter the Unicode converter * @param errBytes the codepage bytes which were in error * @param len on input the capacity of errBytes, on output the number of * bytes which were copied to it * @param err the error status code. * If the substitution character array is too small, an * <TT>U_INDEX_OUTOFBOUNDS_ERROR</TT> will be returned. * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_getInvalidChars(const UConverter *converter, char *errBytes, int8_t *len, UErrorCode *err); /** * Fills in the output parameter, errChars, with the error characters from the * last failing conversion. * * @param converter the Unicode converter * @param errUChars the UChars which were in error * @param len on input the capacity of errUChars, on output the number of * UChars which were copied to it * @param err the error status code. * If the substitution character array is too small, an * <TT>U_INDEX_OUTOFBOUNDS_ERROR</TT> will be returned. * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_getInvalidUChars(const UConverter *converter, UChar *errUChars, int8_t *len, UErrorCode *err); /** * Resets the state of a converter to the default state. This is used * in the case of an error, to restart a conversion from a known default state. * It will also empty the internal output buffers. * @param converter the Unicode converter * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_reset(UConverter *converter); /** * Resets the to-Unicode part of a converter state to the default state. * This is used in the case of an error to restart a conversion to * Unicode to a known default state. It will also empty the internal * output buffers used for the conversion to Unicode codepoints. * @param converter the Unicode converter * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_resetToUnicode(UConverter *converter); /** * Resets the from-Unicode part of a converter state to the default state. * This is used in the case of an error to restart a conversion from * Unicode to a known default state. It will also empty the internal output * buffers used for the conversion from Unicode codepoints. * @param converter the Unicode converter * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_resetFromUnicode(UConverter *converter); /** * Returns the maximum number of bytes that are output per UChar in conversion * from Unicode using this converter. * The returned number can be used with UCNV_GET_MAX_BYTES_FOR_STRING * to calculate the size of a target buffer for conversion from Unicode. * * Note: Before ICU 2.8, this function did not return reliable numbers for * some stateful converters (EBCDIC_STATEFUL, ISO-2022) and LMBCS. * * This number may not be the same as the maximum number of bytes per * "conversion unit". In other words, it may not be the intuitively expected * number of bytes per character that would be published for a charset, * and may not fulfill any other purpose than the allocation of an output * buffer of guaranteed sufficient size for a given input length and converter. * * Examples for special cases that are taken into account: * - Supplementary code points may convert to more bytes than BMP code points. * This function returns bytes per UChar (UTF-16 code unit), not per * Unicode code point, for efficient buffer allocation. * - State-shifting output (SI/SO, escapes, etc.) from stateful converters. * - When m input UChars are converted to n output bytes, then the maximum m/n * is taken into account. * * The number returned here does not take into account * (see UCNV_GET_MAX_BYTES_FOR_STRING): * - callbacks which output more than one charset character sequence per call, * like escape callbacks * - initial and final non-character bytes that are output by some converters * (automatic BOMs, initial escape sequence, final SI, etc.) * * Examples for returned values: * - SBCS charsets: 1 * - Shift-JIS: 2 * - UTF-16: 2 (2 per BMP, 4 per surrogate _pair_, BOM not counted) * - UTF-8: 3 (3 per BMP, 4 per surrogate _pair_) * - EBCDIC_STATEFUL (EBCDIC mixed SBCS/DBCS): 3 (SO + DBCS) * - ISO-2022: 3 (always outputs UTF-8) * - ISO-2022-JP: 6 (4-byte escape sequences + DBCS) * - ISO-2022-CN: 8 (4-byte designator sequences + 2-byte SS2/SS3 + DBCS) * * @param converter The Unicode converter. * @return The maximum number of bytes per UChar (16 bit code unit) * that are output by ucnv_fromUnicode(), * to be used together with UCNV_GET_MAX_BYTES_FOR_STRING * for buffer allocation. * * @see UCNV_GET_MAX_BYTES_FOR_STRING * @see ucnv_getMinCharSize * @stable ICU 2.0 */ U_CAPI int8_t U_EXPORT2 ucnv_getMaxCharSize(const UConverter *converter); /** * Calculates the size of a buffer for conversion from Unicode to a charset. * The calculated size is guaranteed to be sufficient for this conversion. * * It takes into account initial and final non-character bytes that are output * by some converters. * It does not take into account callbacks which output more than one charset * character sequence per call, like escape callbacks. * The default (substitution) callback only outputs one charset character sequence. * * @param length Number of UChars to be converted. * @param maxCharSize Return value from ucnv_getMaxCharSize() for the converter * that will be used. * @return Size of a buffer that will be large enough to hold the output bytes of * converting length UChars with the converter that returned the maxCharSize. * * @see ucnv_getMaxCharSize * @stable ICU 2.8 */ #define UCNV_GET_MAX_BYTES_FOR_STRING … /** * Returns the minimum byte length (per codepoint) for characters in this codepage. * This is usually either 1 or 2. * @param converter the Unicode converter * @return the minimum number of bytes per codepoint allowed by this particular converter * @see ucnv_getMaxCharSize * @stable ICU 2.0 */ U_CAPI int8_t U_EXPORT2 ucnv_getMinCharSize(const UConverter *converter); /** * Returns the display name of the converter passed in based on the Locale * passed in. If the locale contains no display name, the internal ASCII * name will be filled in. * * @param converter the Unicode converter. * @param displayLocale is the specific Locale we want to localized for * @param displayName user provided buffer to be filled in * @param displayNameCapacity size of displayName Buffer * @param err error status code * @return displayNameLength number of UChar needed in displayName * @see ucnv_getName * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 ucnv_getDisplayName(const UConverter *converter, const char *displayLocale, UChar *displayName, int32_t displayNameCapacity, UErrorCode *err); /** * Gets the internal, canonical name of the converter (zero-terminated). * The lifetime of the returned string will be that of the converter * passed to this function. * @param converter the Unicode converter * @param err UErrorCode status * @return the internal name of the converter * @see ucnv_getDisplayName * @stable ICU 2.0 */ U_CAPI const char * U_EXPORT2 ucnv_getName(const UConverter *converter, UErrorCode *err); /** * Gets a codepage number associated with the converter. This is not guaranteed * to be the one used to create the converter. Some converters do not represent * platform registered codepages and return zero for the codepage number. * The error code fill-in parameter indicates if the codepage number * is available. * Does not check if the converter is <TT>NULL</TT> or if converter's data * table is <TT>NULL</TT>. * * Important: The use of CCSIDs is not recommended because it is limited * to only two platforms in principle and only one (UCNV_IBM) in the current * ICU converter API. * Also, CCSIDs are insufficient to identify IBM Unicode conversion tables precisely. * For more details see ucnv_openCCSID(). * * @param converter the Unicode converter * @param err the error status code. * @return If any error occurs, -1 will be returned otherwise, the codepage number * will be returned * @see ucnv_openCCSID * @see ucnv_getPlatform * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 ucnv_getCCSID(const UConverter *converter, UErrorCode *err); /** * Gets a codepage platform associated with the converter. Currently, * only <TT>UCNV_IBM</TT> will be returned. * Does not test if the converter is <TT>NULL</TT> or if converter's data * table is <TT>NULL</TT>. * @param converter the Unicode converter * @param err the error status code. * @return The codepage platform * @stable ICU 2.0 */ U_CAPI UConverterPlatform U_EXPORT2 ucnv_getPlatform(const UConverter *converter, UErrorCode *err); /** * Gets the type of the converter * e.g. SBCS, MBCS, DBCS, UTF8, UTF16_BE, UTF16_LE, ISO_2022, * EBCDIC_STATEFUL, LATIN_1 * @param converter a valid, opened converter * @return the type of the converter * @stable ICU 2.0 */ U_CAPI UConverterType U_EXPORT2 ucnv_getType(const UConverter * converter); /** * Gets the "starter" (lead) bytes for converters of type MBCS. * Will fill in an <TT>U_ILLEGAL_ARGUMENT_ERROR</TT> if converter passed in * is not MBCS. Fills in an array of type UBool, with the value of the byte * as offset to the array. For example, if (starters[0x20] == true) at return, * it means that the byte 0x20 is a starter byte in this converter. * Context pointers are always owned by the caller. * * @param converter a valid, opened converter of type MBCS * @param starters an array of size 256 to be filled in * @param err error status, <TT>U_ILLEGAL_ARGUMENT_ERROR</TT> if the * converter is not a type which can return starters. * @see ucnv_getType * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_getStarters(const UConverter* converter, UBool starters[256], UErrorCode* err); /** * Selectors for Unicode sets that can be returned by ucnv_getUnicodeSet(). * @see ucnv_getUnicodeSet * @stable ICU 2.6 */ typedef enum UConverterUnicodeSet { /** Select the set of roundtrippable Unicode code points. @stable ICU 2.6 */ UCNV_ROUNDTRIP_SET, /** Select the set of Unicode code points with roundtrip or fallback mappings. @stable ICU 4.0 */ UCNV_ROUNDTRIP_AND_FALLBACK_SET, #ifndef U_HIDE_DEPRECATED_API /** * Number of UConverterUnicodeSet selectors. * @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420. */ UCNV_SET_COUNT #endif // U_HIDE_DEPRECATED_API } UConverterUnicodeSet; /** * Returns the set of Unicode code points that can be converted by an ICU converter. * * Returns one of several kinds of set: * * 1. UCNV_ROUNDTRIP_SET * * The set of all Unicode code points that can be roundtrip-converted * (converted without any data loss) with the converter (ucnv_fromUnicode()). * This set will not include code points that have fallback mappings * or are only the result of reverse fallback mappings. * This set will also not include PUA code points with fallbacks, although * ucnv_fromUnicode() will always uses those mappings despite ucnv_setFallback(). * See UTR #22 "Character Mapping Markup Language" * at http://www.unicode.org/reports/tr22/ * * This is useful for example for * - checking that a string or document can be roundtrip-converted with a converter, * without/before actually performing the conversion * - testing if a converter can be used for text for typical text for a certain locale, * by comparing its roundtrip set with the set of ExemplarCharacters from * ICU's locale data or other sources * * 2. UCNV_ROUNDTRIP_AND_FALLBACK_SET * * The set of all Unicode code points that can be converted with the converter (ucnv_fromUnicode()) * when fallbacks are turned on (see ucnv_setFallback()). * This set includes all code points with roundtrips and fallbacks (but not reverse fallbacks). * * In the future, there may be more UConverterUnicodeSet choices to select * sets with different properties. * * @param cnv The converter for which a set is requested. * @param setFillIn A valid USet *. It will be cleared by this function before * the converter's specific set is filled into the USet. * @param whichSet A UConverterUnicodeSet selector; * currently UCNV_ROUNDTRIP_SET is the only supported value. * @param pErrorCode ICU error code in/out parameter. * Must fulfill U_SUCCESS before the function call. * * @see UConverterUnicodeSet * @see uset_open * @see uset_close * @stable ICU 2.6 */ U_CAPI void U_EXPORT2 ucnv_getUnicodeSet(const UConverter *cnv, USet *setFillIn, UConverterUnicodeSet whichSet, UErrorCode *pErrorCode); /** * Gets the current callback function used by the converter when an illegal * or invalid codepage sequence is found. * Context pointers are always owned by the caller. * * @param converter the unicode converter * @param action fillin: returns the callback function pointer * @param context fillin: returns the callback's private void* context * @see ucnv_setToUCallBack * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_getToUCallBack (const UConverter * converter, UConverterToUCallback *action, const void **context); /** * Gets the current callback function used by the converter when illegal * or invalid Unicode sequence is found. * Context pointers are always owned by the caller. * * @param converter the unicode converter * @param action fillin: returns the callback function pointer * @param context fillin: returns the callback's private void* context * @see ucnv_setFromUCallBack * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_getFromUCallBack (const UConverter * converter, UConverterFromUCallback *action, const void **context); /** * Changes the callback function used by the converter when * an illegal or invalid sequence is found. * Context pointers are always owned by the caller. * Predefined actions and contexts can be found in the ucnv_err.h header. * * @param converter the unicode converter * @param newAction the new callback function * @param newContext the new toUnicode callback context pointer. This can be NULL. * @param oldAction fillin: returns the old callback function pointer. This can be NULL. * @param oldContext fillin: returns the old callback's private void* context. This can be NULL. * @param err The error code status * @see ucnv_getToUCallBack * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_setToUCallBack (UConverter * converter, UConverterToUCallback newAction, const void* newContext, UConverterToUCallback *oldAction, const void** oldContext, UErrorCode * err); /** * Changes the current callback function used by the converter when * an illegal or invalid sequence is found. * Context pointers are always owned by the caller. * Predefined actions and contexts can be found in the ucnv_err.h header. * * @param converter the unicode converter * @param newAction the new callback function * @param newContext the new fromUnicode callback context pointer. This can be NULL. * @param oldAction fillin: returns the old callback function pointer. This can be NULL. * @param oldContext fillin: returns the old callback's private void* context. This can be NULL. * @param err The error code status * @see ucnv_getFromUCallBack * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_setFromUCallBack (UConverter * converter, UConverterFromUCallback newAction, const void *newContext, UConverterFromUCallback *oldAction, const void **oldContext, UErrorCode * err); /** * Converts an array of unicode characters to an array of codepage * characters. This function is optimized for converting a continuous * stream of data in buffer-sized chunks, where the entire source and * target does not fit in available buffers. * * The source pointer is an in/out parameter. It starts out pointing where the * conversion is to begin, and ends up pointing after the last UChar consumed. * * Target similarly starts out pointer at the first available byte in the output * buffer, and ends up pointing after the last byte written to the output. * * The converter always attempts to consume the entire source buffer, unless * (1.) the target buffer is full, or (2.) a failing error is returned from the * current callback function. When a successful error status has been * returned, it means that all of the source buffer has been * consumed. At that point, the caller should reset the source and * sourceLimit pointers to point to the next chunk. * * At the end of the stream (flush==true), the input is completely consumed * when *source==sourceLimit and no error code is set. * The converter object is then automatically reset by this function. * (This means that a converter need not be reset explicitly between data * streams if it finishes the previous stream without errors.) * * This is a <I>stateful</I> conversion. Additionally, even when all source data has * been consumed, some data may be in the converters' internal state. * Call this function repeatedly, updating the target pointers with * the next empty chunk of target in case of a * <TT>U_BUFFER_OVERFLOW_ERROR</TT>, and updating the source pointers * with the next chunk of source when a successful error status is * returned, until there are no more chunks of source data. * @param converter the Unicode converter * @param target I/O parameter. Input : Points to the beginning of the buffer to copy * codepage characters to. Output : points to after the last codepage character copied * to <TT>target</TT>. * @param targetLimit the pointer just after last of the <TT>target</TT> buffer * @param source I/O parameter, pointer to pointer to the source Unicode character buffer. * @param sourceLimit the pointer just after the last of the source buffer * @param offsets if NULL is passed, nothing will happen to it, otherwise it needs to have the same number * of allocated cells as <TT>target</TT>. Will fill in offsets from target to source pointer * e.g: <TT>offsets[3]</TT> is equal to 6, it means that the <TT>target[3]</TT> was a result of transcoding <TT>source[6]</TT> * For output data carried across calls, and other data without a specific source character * (such as from escape sequences or callbacks) -1 will be placed for offsets. * @param flush set to <TT>true</TT> if the current source buffer is the last available * chunk of the source, <TT>false</TT> otherwise. Note that if a failing status is returned, * this function may have to be called multiple times with flush set to <TT>true</TT> until * the source buffer is consumed. * @param err the error status. <TT>U_ILLEGAL_ARGUMENT_ERROR</TT> will be set if the * converter is <TT>NULL</TT>. * <code>U_BUFFER_OVERFLOW_ERROR</code> will be set if the target is full and there is * still data to be written to the target. * @see ucnv_fromUChars * @see ucnv_convert * @see ucnv_getMinCharSize * @see ucnv_setToUCallBack * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_fromUnicode (UConverter * converter, char **target, const char *targetLimit, const UChar ** source, const UChar * sourceLimit, int32_t* offsets, UBool flush, UErrorCode * err); /** * Converts a buffer of codepage bytes into an array of unicode UChars * characters. This function is optimized for converting a continuous * stream of data in buffer-sized chunks, where the entire source and * target does not fit in available buffers. * * The source pointer is an in/out parameter. It starts out pointing where the * conversion is to begin, and ends up pointing after the last byte of source consumed. * * Target similarly starts out pointer at the first available UChar in the output * buffer, and ends up pointing after the last UChar written to the output. * It does NOT necessarily keep UChar sequences together. * * The converter always attempts to consume the entire source buffer, unless * (1.) the target buffer is full, or (2.) a failing error is returned from the * current callback function. When a successful error status has been * returned, it means that all of the source buffer has been * consumed. At that point, the caller should reset the source and * sourceLimit pointers to point to the next chunk. * * At the end of the stream (flush==true), the input is completely consumed * when *source==sourceLimit and no error code is set * The converter object is then automatically reset by this function. * (This means that a converter need not be reset explicitly between data * streams if it finishes the previous stream without errors.) * * This is a <I>stateful</I> conversion. Additionally, even when all source data has * been consumed, some data may be in the converters' internal state. * Call this function repeatedly, updating the target pointers with * the next empty chunk of target in case of a * <TT>U_BUFFER_OVERFLOW_ERROR</TT>, and updating the source pointers * with the next chunk of source when a successful error status is * returned, until there are no more chunks of source data. * @param converter the Unicode converter * @param target I/O parameter. Input : Points to the beginning of the buffer to copy * UChars into. Output : points to after the last UChar copied. * @param targetLimit the pointer just after the end of the <TT>target</TT> buffer * @param source I/O parameter, pointer to pointer to the source codepage buffer. * @param sourceLimit the pointer to the byte after the end of the source buffer * @param offsets if NULL is passed, nothing will happen to it, otherwise it needs to have the same number * of allocated cells as <TT>target</TT>. Will fill in offsets from target to source pointer * e.g: <TT>offsets[3]</TT> is equal to 6, it means that the <TT>target[3]</TT> was a result of transcoding <TT>source[6]</TT> * For output data carried across calls, and other data without a specific source character * (such as from escape sequences or callbacks) -1 will be placed for offsets. * @param flush set to <TT>true</TT> if the current source buffer is the last available * chunk of the source, <TT>false</TT> otherwise. Note that if a failing status is returned, * this function may have to be called multiple times with flush set to <TT>true</TT> until * the source buffer is consumed. * @param err the error status. <TT>U_ILLEGAL_ARGUMENT_ERROR</TT> will be set if the * converter is <TT>NULL</TT>. * <code>U_BUFFER_OVERFLOW_ERROR</code> will be set if the target is full and there is * still data to be written to the target. * @see ucnv_fromUChars * @see ucnv_convert * @see ucnv_getMinCharSize * @see ucnv_setFromUCallBack * @see ucnv_getNextUChar * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_toUnicode(UConverter *converter, UChar **target, const UChar *targetLimit, const char **source, const char *sourceLimit, int32_t *offsets, UBool flush, UErrorCode *err); /** * Convert the Unicode string into a codepage string using an existing UConverter. * The output string is NUL-terminated if possible. * * This function is a more convenient but less powerful version of ucnv_fromUnicode(). * It is only useful for whole strings, not for streaming conversion. * * The maximum output buffer capacity required (barring output from callbacks) will be * UCNV_GET_MAX_BYTES_FOR_STRING(srcLength, ucnv_getMaxCharSize(cnv)). * * @param cnv the converter object to be used (ucnv_resetFromUnicode() will be called) * @param src the input Unicode string * @param srcLength the input string length, or -1 if NUL-terminated * @param dest destination string buffer, can be NULL if destCapacity==0 * @param destCapacity the number of chars available at dest * @param pErrorCode normal ICU error code; * common error codes that may be set by this function include * U_BUFFER_OVERFLOW_ERROR, U_STRING_NOT_TERMINATED_WARNING, * U_ILLEGAL_ARGUMENT_ERROR, and conversion errors * @return the length of the output string, not counting the terminating NUL; * if the length is greater than destCapacity, then the string will not fit * and a buffer of the indicated length would need to be passed in * @see ucnv_fromUnicode * @see ucnv_convert * @see UCNV_GET_MAX_BYTES_FOR_STRING * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 ucnv_fromUChars(UConverter *cnv, char *dest, int32_t destCapacity, const UChar *src, int32_t srcLength, UErrorCode *pErrorCode); /** * Convert the codepage string into a Unicode string using an existing UConverter. * The output string is NUL-terminated if possible. * * This function is a more convenient but less powerful version of ucnv_toUnicode(). * It is only useful for whole strings, not for streaming conversion. * * The maximum output buffer capacity required (barring output from callbacks) will be * 2*srcLength (each char may be converted into a surrogate pair). * * @param cnv the converter object to be used (ucnv_resetToUnicode() will be called) * @param src the input codepage string * @param srcLength the input string length, or -1 if NUL-terminated * @param dest destination string buffer, can be NULL if destCapacity==0 * @param destCapacity the number of UChars available at dest * @param pErrorCode normal ICU error code; * common error codes that may be set by this function include * U_BUFFER_OVERFLOW_ERROR, U_STRING_NOT_TERMINATED_WARNING, * U_ILLEGAL_ARGUMENT_ERROR, and conversion errors * @return the length of the output string, not counting the terminating NUL; * if the length is greater than destCapacity, then the string will not fit * and a buffer of the indicated length would need to be passed in * @see ucnv_toUnicode * @see ucnv_convert * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 ucnv_toUChars(UConverter *cnv, UChar *dest, int32_t destCapacity, const char *src, int32_t srcLength, UErrorCode *pErrorCode); /** * Convert a codepage buffer into Unicode one character at a time. * The input is completely consumed when the U_INDEX_OUTOFBOUNDS_ERROR is set. * * Advantage compared to ucnv_toUnicode() or ucnv_toUChars(): * - Faster for small amounts of data, for most converters, e.g., * US-ASCII, ISO-8859-1, UTF-8/16/32, and most "normal" charsets. * (For complex converters, e.g., SCSU, UTF-7 and ISO 2022 variants, * it uses ucnv_toUnicode() internally.) * - Convenient. * * Limitations compared to ucnv_toUnicode(): * - Always assumes flush=true. * This makes ucnv_getNextUChar() unsuitable for "streaming" conversion, * that is, for where the input is supplied in multiple buffers, * because ucnv_getNextUChar() will assume the end of the input at the end * of the first buffer. * - Does not provide offset output. * * It is possible to "mix" ucnv_getNextUChar() and ucnv_toUnicode() because * ucnv_getNextUChar() uses the current state of the converter * (unlike ucnv_toUChars() which always resets first). * However, if ucnv_getNextUChar() is called after ucnv_toUnicode() * stopped in the middle of a character sequence (with flush=false), * then ucnv_getNextUChar() will always use the slower ucnv_toUnicode() * internally until the next character boundary. * (This is new in ICU 2.6. In earlier releases, ucnv_getNextUChar() had to * start at a character boundary.) * * Instead of using ucnv_getNextUChar(), it is recommended * to convert using ucnv_toUnicode() or ucnv_toUChars() * and then iterate over the text using U16_NEXT() or a UCharIterator (uiter.h) * or a C++ CharacterIterator or similar. * This allows streaming conversion and offset output, for example. * * <p>Handling of surrogate pairs and supplementary-plane code points:<br> * There are two different kinds of codepages that provide mappings for surrogate characters: * <ul> * <li>Codepages like UTF-8, UTF-32, and GB 18030 provide direct representations for Unicode * code points U+10000-U+10ffff as well as for single surrogates U+d800-U+dfff. * Each valid sequence will result in exactly one returned code point. * If a sequence results in a single surrogate, then that will be returned * by itself, even if a neighboring sequence encodes the matching surrogate.</li> * <li>Codepages like SCSU and LMBCS (and UTF-16) provide direct representations only for BMP code points * including surrogates. Code points in supplementary planes are represented with * two sequences, each encoding a surrogate. * For these codepages, matching pairs of surrogates will be combined into single * code points for returning from this function. * (Note that SCSU is actually a mix of these codepage types.)</li> * </ul></p> * * @param converter an open UConverter * @param source the address of a pointer to the codepage buffer, will be * updated to point after the bytes consumed in the conversion call. * @param sourceLimit points to the end of the input buffer * @param err fills in error status (see ucnv_toUnicode) * <code>U_INDEX_OUTOFBOUNDS_ERROR</code> will be set if the input * is empty or does not convert to any output (e.g.: pure state-change * codes SI/SO, escape sequences for ISO 2022, * or if the callback did not output anything, ...). * This function will not set a <code>U_BUFFER_OVERFLOW_ERROR</code> because * the "buffer" is the return code. However, there might be subsequent output * stored in the converter object * that will be returned in following calls to this function. * @return a UChar32 resulting from the partial conversion of source * @see ucnv_toUnicode * @see ucnv_toUChars * @see ucnv_convert * @stable ICU 2.0 */ U_CAPI UChar32 U_EXPORT2 ucnv_getNextUChar(UConverter * converter, const char **source, const char * sourceLimit, UErrorCode * err); /** * Convert from one external charset to another using two existing UConverters. * Internally, two conversions - ucnv_toUnicode() and ucnv_fromUnicode() - * are used, "pivoting" through 16-bit Unicode. * * Important: For streaming conversion (multiple function calls for successive * parts of a text stream), the caller must provide a pivot buffer explicitly, * and must preserve the pivot buffer and associated pointers from one * call to another. (The buffer may be moved if its contents and the relative * pointer positions are preserved.) * * There is a similar function, ucnv_convert(), * which has the following limitations: * - it takes charset names, not converter objects, so that * - two converters are opened for each call * - only single-string conversion is possible, not streaming operation * - it does not provide enough information to find out, * in case of failure, whether the toUnicode or * the fromUnicode conversion failed * * By contrast, ucnv_convertEx() * - takes UConverter parameters instead of charset names * - fully exposes the pivot buffer for streaming conversion and complete error handling * * ucnv_convertEx() also provides further convenience: * - an option to reset the converters at the beginning * (if reset==true, see parameters; * also sets *pivotTarget=*pivotSource=pivotStart) * - allow NUL-terminated input * (only a single NUL byte, will not work for charsets with multi-byte NULs) * (if sourceLimit==NULL, see parameters) * - terminate with a NUL on output * (only a single NUL byte, not useful for charsets with multi-byte NULs), * or set U_STRING_NOT_TERMINATED_WARNING if the output exactly fills * the target buffer * - the pivot buffer can be provided internally; * possible only for whole-string conversion, not streaming conversion; * in this case, the caller will not be able to get details about where an * error occurred * (if pivotStart==NULL, see below) * * The function returns when one of the following is true: * - the entire source text has been converted successfully to the target buffer * - a target buffer overflow occurred (U_BUFFER_OVERFLOW_ERROR) * - a conversion error occurred * (other U_FAILURE(), see description of pErrorCode) * * Limitation compared to the direct use of * ucnv_fromUnicode() and ucnv_toUnicode(): * ucnv_convertEx() does not provide offset information. * * Limitation compared to ucnv_fromUChars() and ucnv_toUChars(): * ucnv_convertEx() does not support preflighting directly. * * Sample code for converting a single string from * one external charset to UTF-8, ignoring the location of errors: * * \code * int32_t * myToUTF8(UConverter *cnv, * const char *s, int32_t length, * char *u8, int32_t capacity, * UErrorCode *pErrorCode) { * UConverter *utf8Cnv; * char *target; * * if(U_FAILURE(*pErrorCode)) { * return 0; * } * * utf8Cnv=myGetCachedUTF8Converter(pErrorCode); * if(U_FAILURE(*pErrorCode)) { * return 0; * } * * if(length<0) { * length=strlen(s); * } * target=u8; * ucnv_convertEx(utf8Cnv, cnv, * &target, u8+capacity, * &s, s+length, * NULL, NULL, NULL, NULL, * true, true, * pErrorCode); * * myReleaseCachedUTF8Converter(utf8Cnv); * * // return the output string length, but without preflighting * return (int32_t)(target-u8); * } * \endcode * * @param targetCnv Output converter, used to convert from the UTF-16 pivot * to the target using ucnv_fromUnicode(). * @param sourceCnv Input converter, used to convert from the source to * the UTF-16 pivot using ucnv_toUnicode(). * @param target I/O parameter, same as for ucnv_fromUChars(). * Input: *target points to the beginning of the target buffer. * Output: *target points to the first unit after the last char written. * @param targetLimit Pointer to the first unit after the target buffer. * @param source I/O parameter, same as for ucnv_toUChars(). * Input: *source points to the beginning of the source buffer. * Output: *source points to the first unit after the last char read. * @param sourceLimit Pointer to the first unit after the source buffer. * @param pivotStart Pointer to the UTF-16 pivot buffer. If pivotStart==NULL, * then an internal buffer is used and the other pivot * arguments are ignored and can be NULL as well. * @param pivotSource I/O parameter, same as source in ucnv_fromUChars() for * conversion from the pivot buffer to the target buffer. * @param pivotTarget I/O parameter, same as target in ucnv_toUChars() for * conversion from the source buffer to the pivot buffer. * It must be pivotStart<=*pivotSource<=*pivotTarget<=pivotLimit * and pivotStart<pivotLimit (unless pivotStart==NULL). * @param pivotLimit Pointer to the first unit after the pivot buffer. * @param reset If true, then ucnv_resetToUnicode(sourceCnv) and * ucnv_resetFromUnicode(targetCnv) are called, and the * pivot pointers are reset (*pivotTarget=*pivotSource=pivotStart). * @param flush If true, indicates the end of the input. * Passed directly to ucnv_toUnicode(), and carried over to * ucnv_fromUnicode() when the source is empty as well. * @param pErrorCode ICU error code in/out parameter. * Must fulfill U_SUCCESS before the function call. * U_BUFFER_OVERFLOW_ERROR always refers to the target buffer * because overflows into the pivot buffer are handled internally. * Other conversion errors are from the source-to-pivot * conversion if *pivotSource==pivotStart, otherwise from * the pivot-to-target conversion. * * @see ucnv_convert * @see ucnv_fromAlgorithmic * @see ucnv_toAlgorithmic * @see ucnv_fromUnicode * @see ucnv_toUnicode * @see ucnv_fromUChars * @see ucnv_toUChars * @stable ICU 2.6 */ 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); /** * Convert from one external charset to another. * Internally, two converters are opened according to the name arguments, * then the text is converted to and from the 16-bit Unicode "pivot" * using ucnv_convertEx(), then the converters are closed again. * * This is a convenience function, not an efficient way to convert a lot of text: * ucnv_convert() * - takes charset names, not converter objects, so that * - two converters are opened for each call * - only single-string conversion is possible, not streaming operation * - does not provide enough information to find out, * in case of failure, whether the toUnicode or * the fromUnicode conversion failed * - allows NUL-terminated input * (only a single NUL byte, will not work for charsets with multi-byte NULs) * (if sourceLength==-1, see parameters) * - terminate with a NUL on output * (only a single NUL byte, not useful for charsets with multi-byte NULs), * or set U_STRING_NOT_TERMINATED_WARNING if the output exactly fills * the target buffer * - a pivot buffer is provided internally * * The function returns when one of the following is true: * - the entire source text has been converted successfully to the target buffer * and either the target buffer is terminated with a single NUL byte * or the error code is set to U_STRING_NOT_TERMINATED_WARNING * - a target buffer overflow occurred (U_BUFFER_OVERFLOW_ERROR) * and the full output string length is returned ("preflighting") * - a conversion error occurred * (other U_FAILURE(), see description of pErrorCode) * * @param toConverterName The name of the converter that is used to convert * from the UTF-16 pivot buffer to the target. * @param fromConverterName The name of the converter that is used to convert * from the source to the UTF-16 pivot buffer. * @param target Pointer to the output buffer. * @param targetCapacity Capacity of the target, in bytes. * @param source Pointer to the input buffer. * @param sourceLength Length of the input text, in bytes, or -1 for NUL-terminated input. * @param pErrorCode ICU error code in/out parameter. * Must fulfill U_SUCCESS before the function call. * @return Length of the complete output text in bytes, even if it exceeds the targetCapacity * and a U_BUFFER_OVERFLOW_ERROR is set. * * @see ucnv_convertEx * @see ucnv_fromAlgorithmic * @see ucnv_toAlgorithmic * @see ucnv_fromUnicode * @see ucnv_toUnicode * @see ucnv_fromUChars * @see ucnv_toUChars * @see ucnv_getNextUChar * @stable ICU 2.0 */ 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); /** * Convert from one external charset to another. * Internally, the text is converted to and from the 16-bit Unicode "pivot" * using ucnv_convertEx(). ucnv_toAlgorithmic() works exactly like ucnv_convert() * except that the two converters need not be looked up and opened completely. * * The source-to-pivot conversion uses the cnv converter parameter. * The pivot-to-target conversion uses a purely algorithmic converter * according to the specified type, e.g., UCNV_UTF8 for a UTF-8 converter. * * Internally, the algorithmic converter is opened and closed for each * function call, which is more efficient than using the public ucnv_open() * but somewhat less efficient than only resetting an existing converter * and using ucnv_convertEx(). * * This function is more convenient than ucnv_convertEx() for single-string * conversions, especially when "preflighting" is desired (returning the length * of the complete output even if it does not fit into the target buffer; * see the User Guide Strings chapter). See ucnv_convert() for details. * * @param algorithmicType UConverterType constant identifying the desired target * charset as a purely algorithmic converter. * Those are converters for Unicode charsets like * UTF-8, BOCU-1, SCSU, UTF-7, IMAP-mailbox-name, etc., * as well as US-ASCII and ISO-8859-1. * @param cnv The converter that is used to convert * from the source to the UTF-16 pivot buffer. * @param target Pointer to the output buffer. * @param targetCapacity Capacity of the target, in bytes. * @param source Pointer to the input buffer. * @param sourceLength Length of the input text, in bytes * @param pErrorCode ICU error code in/out parameter. * Must fulfill U_SUCCESS before the function call. * @return Length of the complete output text in bytes, even if it exceeds the targetCapacity * and a U_BUFFER_OVERFLOW_ERROR is set. * * @see ucnv_fromAlgorithmic * @see ucnv_convert * @see ucnv_convertEx * @see ucnv_fromUnicode * @see ucnv_toUnicode * @see ucnv_fromUChars * @see ucnv_toUChars * @stable ICU 2.6 */ 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); /** * Convert from one external charset to another. * Internally, the text is converted to and from the 16-bit Unicode "pivot" * using ucnv_convertEx(). ucnv_fromAlgorithmic() works exactly like ucnv_convert() * except that the two converters need not be looked up and opened completely. * * The source-to-pivot conversion uses a purely algorithmic converter * according to the specified type, e.g., UCNV_UTF8 for a UTF-8 converter. * The pivot-to-target conversion uses the cnv converter parameter. * * Internally, the algorithmic converter is opened and closed for each * function call, which is more efficient than using the public ucnv_open() * but somewhat less efficient than only resetting an existing converter * and using ucnv_convertEx(). * * This function is more convenient than ucnv_convertEx() for single-string * conversions, especially when "preflighting" is desired (returning the length * of the complete output even if it does not fit into the target buffer; * see the User Guide Strings chapter). See ucnv_convert() for details. * * @param cnv The converter that is used to convert * from the UTF-16 pivot buffer to the target. * @param algorithmicType UConverterType constant identifying the desired source * charset as a purely algorithmic converter. * Those are converters for Unicode charsets like * UTF-8, BOCU-1, SCSU, UTF-7, IMAP-mailbox-name, etc., * as well as US-ASCII and ISO-8859-1. * @param target Pointer to the output buffer. * @param targetCapacity Capacity of the target, in bytes. * @param source Pointer to the input buffer. * @param sourceLength Length of the input text, in bytes * @param pErrorCode ICU error code in/out parameter. * Must fulfill U_SUCCESS before the function call. * @return Length of the complete output text in bytes, even if it exceeds the targetCapacity * and a U_BUFFER_OVERFLOW_ERROR is set. * * @see ucnv_fromAlgorithmic * @see ucnv_convert * @see ucnv_convertEx * @see ucnv_fromUnicode * @see ucnv_toUnicode * @see ucnv_fromUChars * @see ucnv_toUChars * @stable ICU 2.6 */ 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); /** * Frees up memory occupied by unused, cached converter shared data. * * @return the number of cached converters successfully deleted * @see ucnv_close * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 ucnv_flushCache(void); /** * Returns the number of available converters, as per the alias file. * * @return the number of available converters * @see ucnv_getAvailableName * @stable ICU 2.0 */ U_CAPI int32_t U_EXPORT2 ucnv_countAvailable(void); /** * Gets the canonical converter name of the specified converter from a list of * all available converters contained in the alias file. All converters * in this list can be opened. * * @param n the index to a converter available on the system (in the range <TT>[0..ucnv_countAvailable()]</TT>) * @return a pointer a string (library owned), or <TT>NULL</TT> if the index is out of bounds. * @see ucnv_countAvailable * @stable ICU 2.0 */ U_CAPI const char* U_EXPORT2 ucnv_getAvailableName(int32_t n); /** * Returns a UEnumeration to enumerate all of the canonical converter * names, as per the alias file, regardless of the ability to open each * converter. * * @return A UEnumeration object for getting all the recognized canonical * converter names. * @see ucnv_getAvailableName * @see uenum_close * @see uenum_next * @stable ICU 2.4 */ U_CAPI UEnumeration * U_EXPORT2 ucnv_openAllNames(UErrorCode *pErrorCode); /** * Gives the number of aliases for a given converter or alias name. * If the alias is ambiguous, then the preferred converter is used * and the status is set to U_AMBIGUOUS_ALIAS_WARNING. * This method only enumerates the listed entries in the alias file. * @param alias alias name * @param pErrorCode error status * @return number of names on alias list for given alias * @stable ICU 2.0 */ U_CAPI uint16_t U_EXPORT2 ucnv_countAliases(const char *alias, UErrorCode *pErrorCode); /** * Gives the name of the alias at given index of alias list. * This method only enumerates the listed entries in the alias file. * If the alias is ambiguous, then the preferred converter is used * and the status is set to U_AMBIGUOUS_ALIAS_WARNING. * @param alias alias name * @param n index in alias list * @param pErrorCode result of operation * @return returns the name of the alias at given index * @see ucnv_countAliases * @stable ICU 2.0 */ U_CAPI const char * U_EXPORT2 ucnv_getAlias(const char *alias, uint16_t n, UErrorCode *pErrorCode); /** * Fill-up the list of alias names for the given alias. * This method only enumerates the listed entries in the alias file. * If the alias is ambiguous, then the preferred converter is used * and the status is set to U_AMBIGUOUS_ALIAS_WARNING. * @param alias alias name * @param aliases fill-in list, aliases is a pointer to an array of * <code>ucnv_countAliases()</code> string-pointers * (<code>const char *</code>) that will be filled in. * The strings themselves are owned by the library. * @param pErrorCode result of operation * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_getAliases(const char *alias, const char **aliases, UErrorCode *pErrorCode); /** * Return a new UEnumeration object for enumerating all the * alias names for a given converter that are recognized by a standard. * This method only enumerates the listed entries in the alias file. * The convrtrs.txt file can be modified to change the results of * this function. * The first result in this list is the same result given by * <code>ucnv_getStandardName</code>, which is the default alias for * the specified standard name. The returned object must be closed with * <code>uenum_close</code> when you are done with the object. * * @param convName original converter name * @param standard name of the standard governing the names; MIME and IANA * are such standards * @param pErrorCode The error code * @return A UEnumeration object for getting all aliases that are recognized * by a standard. If any of the parameters are invalid, NULL * is returned. * @see ucnv_getStandardName * @see uenum_close * @see uenum_next * @stable ICU 2.2 */ U_CAPI UEnumeration * U_EXPORT2 ucnv_openStandardNames(const char *convName, const char *standard, UErrorCode *pErrorCode); /** * Gives the number of standards associated to converter names. * @return number of standards * @stable ICU 2.0 */ U_CAPI uint16_t U_EXPORT2 ucnv_countStandards(void); /** * Gives the name of the standard at given index of standard list. * @param n index in standard list * @param pErrorCode result of operation * @return returns the name of the standard at given index. Owned by the library. * @stable ICU 2.0 */ U_CAPI const char * U_EXPORT2 ucnv_getStandard(uint16_t n, UErrorCode *pErrorCode); /** * Returns a standard name for a given converter name. * <p> * Example alias table:<br> * conv alias1 { STANDARD1 } alias2 { STANDARD1* } * <p> * Result of ucnv_getStandardName("conv", "STANDARD1") from example * alias table:<br> * <b>"alias2"</b> * * @param name original converter name * @param standard name of the standard governing the names; MIME and IANA * are such standards * @param pErrorCode result of operation * @return returns the standard converter name; * if a standard converter name cannot be determined, * then <code>NULL</code> is returned. Owned by the library. * @stable ICU 2.0 */ U_CAPI const char * U_EXPORT2 ucnv_getStandardName(const char *name, const char *standard, UErrorCode *pErrorCode); /** * This function will return the internal canonical converter name of the * tagged alias. This is the opposite of ucnv_openStandardNames, which * returns the tagged alias given the canonical name. * <p> * Example alias table:<br> * conv alias1 { STANDARD1 } alias2 { STANDARD1* } * <p> * Result of ucnv_getStandardName("alias1", "STANDARD1") from example * alias table:<br> * <b>"conv"</b> * * @return returns the canonical converter name; * if a standard or alias name cannot be determined, * then <code>NULL</code> is returned. The returned string is * owned by the library. * @see ucnv_getStandardName * @stable ICU 2.4 */ U_CAPI const char * U_EXPORT2 ucnv_getCanonicalName(const char *alias, const char *standard, UErrorCode *pErrorCode); /** * Returns the current default converter name. If you want to open * a default converter, you do not need to use this function. * It is faster if you pass a NULL argument to ucnv_open the * default converter. * * If U_CHARSET_IS_UTF8 is defined to 1 in utypes.h then this function * always returns "UTF-8". * * @return returns the current default converter name. * Storage owned by the library * @see ucnv_setDefaultName * @stable ICU 2.0 */ U_CAPI const char * U_EXPORT2 ucnv_getDefaultName(void); #ifndef U_HIDE_SYSTEM_API /** * This function is not thread safe. DO NOT call this function when ANY ICU * function is being used from more than one thread! This function sets the * current default converter name. If this function needs to be called, it * should be called during application initialization. Most of the time, the * results from ucnv_getDefaultName() or ucnv_open with a NULL string argument * is sufficient for your application. * * If U_CHARSET_IS_UTF8 is defined to 1 in utypes.h then this function * does nothing. * * @param name the converter name to be the default (must be known by ICU). * @see ucnv_getDefaultName * @system * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_setDefaultName(const char *name); #endif /* U_HIDE_SYSTEM_API */ /** * Fixes the backslash character mismapping. For example, in SJIS, the backslash * character in the ASCII portion is also used to represent the yen currency sign. * When mapping from Unicode character 0x005C, it's unclear whether to map the * character back to yen or backslash in SJIS. This function will take the input * buffer and replace all the yen sign characters with backslash. This is necessary * when the user tries to open a file with the input buffer on Windows. * This function will test the converter to see whether such mapping is * required. You can sometimes avoid using this function by using the correct version * of Shift-JIS. * * @param cnv The converter representing the target codepage. * @param source the input buffer to be fixed * @param sourceLen the length of the input buffer * @see ucnv_isAmbiguous * @stable ICU 2.0 */ U_CAPI void U_EXPORT2 ucnv_fixFileSeparator(const UConverter *cnv, UChar *source, int32_t sourceLen); /** * Determines if the converter contains ambiguous mappings of the same * character or not. * @param cnv the converter to be tested * @return true if the converter contains ambiguous mapping of the same * character, false otherwise. * @stable ICU 2.0 */ U_CAPI UBool U_EXPORT2 ucnv_isAmbiguous(const UConverter *cnv); /** * Sets the converter to use fallback mappings or not. * Regardless of this flag, the converter will always use * fallbacks from Unicode Private Use code points, as well as * reverse fallbacks (to Unicode). * For details see ".ucm File Format" * in the Conversion Data chapter of the ICU User Guide: * https://unicode-org.github.io/icu/userguide/conversion/data.html#ucm-file-format * * @param cnv The converter to set the fallback mapping usage on. * @param usesFallback true if the user wants the converter to take advantage of the fallback * mapping, false otherwise. * @stable ICU 2.0 * @see ucnv_usesFallback */ U_CAPI void U_EXPORT2 ucnv_setFallback(UConverter *cnv, UBool usesFallback); /** * Determines if the converter uses fallback mappings or not. * This flag has restrictions, see ucnv_setFallback(). * * @param cnv The converter to be tested * @return true if the converter uses fallback, false otherwise. * @stable ICU 2.0 * @see ucnv_setFallback */ U_CAPI UBool U_EXPORT2 ucnv_usesFallback(const UConverter *cnv); /** * Detects Unicode signature byte sequences at the start of the byte stream * and returns the charset name of the indicated Unicode charset. * NULL is returned when no Unicode signature is recognized. * The number of bytes in the signature is output as well. * * The caller can ucnv_open() a converter using the charset name. * The first code unit (UChar) from the start of the stream will be U+FEFF * (the Unicode BOM/signature character) and can usually be ignored. * * For most Unicode charsets it is also possible to ignore the indicated * number of initial stream bytes and start converting after them. * However, there are stateful Unicode charsets (UTF-7 and BOCU-1) for which * this will not work. Therefore, it is best to ignore the first output UChar * instead of the input signature bytes. * <p> * Usage: * * @param source The source string in which the signature should be detected. * @param sourceLength Length of the input string, or -1 if terminated with a NUL byte. * @param signatureLength A pointer to int32_t to receive the number of bytes that make up the signature * of the detected UTF. 0 if not detected. * Can be a NULL pointer. * @param pErrorCode ICU error code in/out parameter. * Must fulfill U_SUCCESS before the function call. * @return The name of the encoding detected. NULL if encoding is not detected. * @stable ICU 2.4 */ U_CAPI const char* U_EXPORT2 ucnv_detectUnicodeSignature(const char* source, int32_t sourceLength, int32_t *signatureLength, UErrorCode *pErrorCode); /** * Returns the number of UChars held in the converter's internal state * because more input is needed for completing the conversion. This function is * useful for mapping semantics of ICU's converter interface to those of iconv, * and this information is not needed for normal conversion. * @param cnv The converter in which the input is held * @param status ICU error code in/out parameter. * Must fulfill U_SUCCESS before the function call. * @return The number of UChars in the state. -1 if an error is encountered. * @stable ICU 3.4 */ U_CAPI int32_t U_EXPORT2 ucnv_fromUCountPending(const UConverter* cnv, UErrorCode* status); /** * Returns the number of chars held in the converter's internal state * because more input is needed for completing the conversion. This function is * useful for mapping semantics of ICU's converter interface to those of iconv, * and this information is not needed for normal conversion. * @param cnv The converter in which the input is held as internal state * @param status ICU error code in/out parameter. * Must fulfill U_SUCCESS before the function call. * @return The number of chars in the state. -1 if an error is encountered. * @stable ICU 3.4 */ U_CAPI int32_t U_EXPORT2 ucnv_toUCountPending(const UConverter* cnv, UErrorCode* status); /** * Returns whether or not the charset of the converter has a fixed number of bytes * per charset character. * An example of this are converters that are of the type UCNV_SBCS or UCNV_DBCS. * Another example is UTF-32 which is always 4 bytes per character. * A Unicode code point may be represented by more than one UTF-8 or UTF-16 code unit * but a UTF-32 converter encodes each code point with 4 bytes. * Note: This method is not intended to be used to determine whether the charset has a * fixed ratio of bytes to Unicode codes <i>units</i> for any particular Unicode encoding form. * false is returned with the UErrorCode if error occurs or cnv is NULL. * @param cnv The converter to be tested * @param status ICU error code in/out parameter * @return true if the converter is fixed-width * @stable ICU 4.8 */ U_CAPI UBool U_EXPORT2 ucnv_isFixedWidth(UConverter *cnv, UErrorCode *status); #endif #endif /*_UCNV*/
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