Index: icu46/source/common/unicode/ucnv.h |
=================================================================== |
--- icu46/source/common/unicode/ucnv.h (revision 0) |
+++ icu46/source/common/unicode/ucnv.h (revision 0) |
@@ -0,0 +1,1997 @@ |
+/* |
+********************************************************************** |
+* Copyright (C) 1999-2010, 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 recogize 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="http://icu-project.org/userguide/conversion.html">User's |
+ * Guide</a>.</p> |
+ */ |
+ |
+#ifndef UCNV_H |
+#define UCNV_H |
+ |
+#include "unicode/ucnv_err.h" |
+#include "unicode/uenum.h" |
+#include "unicode/localpointer.h" |
+ |
+#ifndef __USET_H__ |
+ |
+/** |
+ * USet is the C API type for Unicode sets. |
+ * It is forward-declared here to avoid including the header file if related |
+ * conversion APIs are not used. |
+ * See unicode/uset.h |
+ * |
+ * @see ucnv_getUnicodeSet |
+ * @stable ICU 2.6 |
+ */ |
+struct USet; |
+/** @stable ICU 2.6 */ |
+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 60 |
+/** Maximum length of a converter name including path and terminating NULL @stable ICU 2.0 */ |
+#define UCNV_MAX_FULL_FILE_NAME_LENGTH (600+UCNV_MAX_CONVERTER_NAME_LENGTH) |
+ |
+/** Shift in for EBDCDIC_STATEFUL and iso2022 states @stable ICU 2.0 */ |
+#define UCNV_SI 0x0F |
+/** Shift out for EBDCDIC_STATEFUL and iso2022 states @stable ICU 2.0 */ |
+#define UCNV_SO 0x0E |
+ |
+/** |
+ * Enum for specifying basic types of converters |
+ * @see ucnv_getType |
+ * @stable ICU 2.0 |
+ */ |
+typedef enum { |
+ UCNV_UNSUPPORTED_CONVERTER = -1, |
+ UCNV_SBCS = 0, |
+ UCNV_DBCS = 1, |
+ UCNV_MBCS = 2, |
+ UCNV_LATIN_1 = 3, |
+ UCNV_UTF8 = 4, |
+ UCNV_UTF16_BigEndian = 5, |
+ UCNV_UTF16_LittleEndian = 6, |
+ UCNV_UTF32_BigEndian = 7, |
+ UCNV_UTF32_LittleEndian = 8, |
+ UCNV_EBCDIC_STATEFUL = 9, |
+ UCNV_ISO_2022 = 10, |
+ |
+ UCNV_LMBCS_1 = 11, |
+ UCNV_LMBCS_2, |
+ UCNV_LMBCS_3, |
+ UCNV_LMBCS_4, |
+ UCNV_LMBCS_5, |
+ UCNV_LMBCS_6, |
+ UCNV_LMBCS_8, |
+ UCNV_LMBCS_11, |
+ UCNV_LMBCS_16, |
+ UCNV_LMBCS_17, |
+ UCNV_LMBCS_18, |
+ UCNV_LMBCS_19, |
+ UCNV_LMBCS_LAST = UCNV_LMBCS_19, |
+ UCNV_HZ, |
+ UCNV_SCSU, |
+ UCNV_ISCII, |
+ UCNV_US_ASCII, |
+ UCNV_UTF7, |
+ UCNV_BOCU1, |
+ UCNV_UTF16, |
+ UCNV_UTF32, |
+ UCNV_CESU8, |
+ UCNV_IMAP_MAILBOX, |
+ |
+ /* 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 occured 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 occured 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 ",locale=" |
+ |
+/** |
+ * 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 ",version=" |
+ |
+/** |
+ * 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 ",swaplfnl" |
+ |
+/** |
+ * 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_STABLE 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="http://icu-project.org/userguide/conversion.html">User's |
+ * 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 occured |
+ * @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_STABLE 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 occured |
+ * @see ucnv_open |
+ * @see ucnv_openCCSID |
+ * @see ucnv_close |
+ * @see ucnv_compareNames |
+ * @stable ICU 2.0 |
+ */ |
+U_STABLE 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 |
+ * occured. |
+ * @see ucnv_open |
+ * @see ucnv_openU |
+ * @see ucnv_close |
+ * @see ucnv_getCCSID |
+ * @see ucnv_getPlatform |
+ * @see UConverterPlatform |
+ * @stable ICU 2.0 |
+ */ |
+U_STABLE 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_safeClone() function to clone a |
+ * 'master' 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 occured |
+ * @see udata_open |
+ * @see ucnv_open |
+ * @see ucnv_safeClone |
+ * @see ucnv_close |
+ * @stable ICU 2.2 |
+ */ |
+U_STABLE UConverter* U_EXPORT2 |
+ucnv_openPackage(const char *packageName, const char *converterName, UErrorCode *err); |
+ |
+/** |
+ * 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 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 pointer to size of allocated space. pBufferSize must not be NULL. |
+ * @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 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 |
+ * @stable ICU 2.0 |
+ */ |
+U_STABLE 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(). |
+ * @stable ICU 2.0 |
+ */ |
+#define U_CNV_SAFECLONE_BUFFERSIZE 1024 |
+ |
+/** |
+ * 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_STABLE 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 subsitution 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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 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_STABLE 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(length, maxCharSize) \ |
+ (((int32_t)(length)+10)*(int32_t)(maxCharSize)) |
+ |
+/** |
+ * Returns the minimum byte length for characters in this codepage. |
+ * This is usually either 1 or 2. |
+ * @param converter the Unicode converter |
+ * @return the minimum number of bytes allowed by this particular converter |
+ * @see ucnv_getMaxCharSize |
+ * @stable ICU 2.0 |
+ */ |
+U_STABLE 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 localised 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_STABLE 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_STABLE 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 occurrs, -1 will be returned otherwise, the codepage number |
+ * will be returned |
+ * @see ucnv_openCCSID |
+ * @see ucnv_getPlatform |
+ * @stable ICU 2.0 |
+ */ |
+U_STABLE 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_STABLE 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_STABLE 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_STABLE 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, |
+ /** Number of UConverterUnicodeSet selectors. @stable ICU 2.6 */ |
+ UCNV_SET_COUNT |
+} 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_STABLE void U_EXPORT2 |
+ucnv_getUnicodeSet(const UConverter *cnv, |
+ USet *setFillIn, |
+ UConverterUnicodeSet whichSet, |
+ UErrorCode *pErrorCode); |
+ |
+/** |
+ * Gets the current calback 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE int32_t U_EXPORT2 |
+ucnv_countAvailable(void); |
+ |
+/** |
+ * Gets the canonical converter name of the specified converter from a list of |
+ * all available converters contaied 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_countAvaiable()]</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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE 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_STABLE const char * U_EXPORT2 |
+ucnv_getDefaultName(void); |
+ |
+/** |
+ * 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_STABLE void U_EXPORT2 |
+ucnv_setDefaultName(const char *name); |
+ |
+/** |
+ * 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_STABLE 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_STABLE 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: |
+ * http://www.icu-project.org/userguide/conversion-data.html#ucmformat |
+ * |
+ * @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_STABLE 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_STABLE 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: |
+ * @code |
+ * UErrorCode err = U_ZERO_ERROR; |
+ * char input[] = { '\xEF','\xBB', '\xBF','\x41','\x42','\x43' }; |
+ * int32_t signatureLength = 0; |
+ * char *encoding = ucnv_detectUnicodeSignature(input,sizeof(input),&signatureLength,&err); |
+ * UConverter *conv = NULL; |
+ * UChar output[100]; |
+ * UChar *target = output, *out; |
+ * char *source = input; |
+ * if(encoding!=NULL && U_SUCCESS(err)){ |
+ * // should signature be discarded ? |
+ * conv = ucnv_open(encoding, &err); |
+ * // do the conversion |
+ * ucnv_toUnicode(conv, |
+ * target, output + sizeof(output)/U_SIZEOF_UCHAR, |
+ * source, input + sizeof(input), |
+ * NULL, TRUE, &err); |
+ * out = output; |
+ * if (discardSignature){ |
+ * ++out; // ignore initial U+FEFF |
+ * } |
+ * while(out != target) { |
+ * printf("%04x ", *out++); |
+ * } |
+ * puts(""); |
+ * } |
+ * |
+ * @endcode |
+ * |
+ * @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_STABLE 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_STABLE 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_STABLE int32_t U_EXPORT2 |
+ucnv_toUCountPending(const UConverter* cnv, UErrorCode* status); |
+ |
+#endif |
+ |
+#endif |
+/*_UCNV*/ |
Property changes on: icu46/source/common/unicode/ucnv.h |
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Added: svn:eol-style |
+ LF |