569 lines
22 KiB
C
569 lines
22 KiB
C
/*******************************************************************************
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* *
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* COPYRIGHT: *
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* (C) Copyright International Business Machines Corporation, 1999 *
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* Licensed Material - Program-Property of IBM - All Rights Reserved. *
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* US Government Users Restricted Rights - Use, duplication, or disclosure *
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* restricted by GSA ADP Schedule Contract with IBM Corp. *
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* *
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*******************************************************************************/
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/*
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* ucnv.h:
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* External APIs for the ICU's codeset conversion library
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* Bertrand A. Damiba
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*
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* Modification History:
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*
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* Date Name Description
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* 04/04/99 helena Fixed internal header inclusion.
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*/
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#ifndef UCNV_H
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#define UCNV_H
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#include "utypes.h"
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#include "ucnv_bld.h"
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#include "ucnv_err.h"
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/**
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* Creates a UConverter object with the names specified as a C string.
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* The actual name will be resolved with the alias file.
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* if <TT>NULL</TT> is passed for the converter name, it will create one with the
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* getDefaultName return value.
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* @param converterName : name of the uconv table
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* @param err outgoing error status <TT>U_MEMORY_ALLOCATION_ERROR, TABLE_NOT_FOUND</TT>
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* @return the created Unicode converter object, or <TT>NULL</TT> if an error occured
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* @see ucnv_openU
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* @see ucnv_openCCSID
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* @see ucnv_close
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*/
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CAPI
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UConverter* U_EXPORT2 ucnv_open (const char *converterName,
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UErrorCode * err);
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/**
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* Creates a Unicode converter with the names specified as unicode string. The name should be limited to
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* the ASCII-7 alphanumerics range. The actual name will be resolved with the alias file.
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* if <TT>NULL</TT> is passed for the converter name, it will create one with the
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* getDefaultName return value.
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* @param converterName : name of the uconv table in a zero terminated Unicode string
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* @param err outgoing error status <TT>U_MEMORY_ALLOCATION_ERROR, TABLE_NOT_FOUND</TT>
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* @return the created Unicode converter object, or <TT>NULL</TT> if an error occured
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* @see ucnv_open
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* @see ucnv_openCCSID
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* @see ucnv_close
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*/
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CAPI UConverter* U_EXPORT2 ucnv_openU (const UChar * name,
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UErrorCode * err);
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/**
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* Creates a UConverter object using a CCSID number.
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* @param codepage : codepage # of the uconv table
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* @param platform : codepage's platform (now only <TT>IBM</TT> supported)
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* @param err error status <TT>U_MEMORY_ALLOCATION_ERROR, TABLE_NOT_FOUND</TT>
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* @return the created Unicode converter object, or <TT>NULL</TT> if and error occured
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* @see ucnv_open
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* @see ucnv_openU
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* @see ucnv_close
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*/
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CAPI UConverter* U_EXPORT2 ucnv_openCCSID (int32_t codepage,
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UCNV_PLATFORM platform,
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UErrorCode * err);
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/**
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* Deletes the unicode converter.
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* @param converter the converter object to be deleted
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* @see ucnv_open
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* @see ucnv_openU
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* @see ucnv_openCCSID
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*/
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CAPI void U_EXPORT2 ucnv_close (UConverter * converter);
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/**
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* Fills in the output parameter, subChars, with the substitution characters
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* as multiple bytes.
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* @param converter: the Unicode converter
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* @param subChars: the subsitution characters
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* @param len: on input the capacity of subChars, on output the number of bytes copied to it
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* @param err: the outgoing error status code.
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* If the substitution character array is too small, an
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* <TT>U_INDEX_OUTOFBOUNDS_ERROR</TT> will be returned.
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* @see ucnv_setSubstChars
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*/
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CAPI void U_EXPORT2
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ucnv_getSubstChars (const UConverter * converter,
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char *subChars,
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int8_t * len,
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UErrorCode * err);
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/**
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* Sets the substitution chars when converting from unicode to a codepage. The
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* substitution is specified as a string of 1-4 bytes, and may contain <TT>NULL</TT> byte.
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* The fill-in parameter err will get the error status on return.
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* @param converter the Unicode converter
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* @param subChars the substitution character byte sequence we want set
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* @param len the number of bytes in subChars
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* @param err the error status code. <TT>U_INDEX_OUTOFBOUNDS_ERROR </TT> if
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* len is bigger than the maximum number of bytes allowed in subchars
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* @see ucnv_getSubstChars
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*/
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CAPI void U_EXPORT2
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ucnv_setSubstChars (UConverter * converter,
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const char *subChars,
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int8_t len,
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UErrorCode * err);
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/**
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* Fills in the output parameter, errBytes, with the error characters from the
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* last failing conversion.
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* @param converter: the Unicode converter
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* @param errBytes: the bytes in error
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* @param len: on input the capacity of errBytes, on output the number of bytes copied to it
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* @param err: the outgoing error status code.
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* If the substitution character array is too small, an
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* <TT>U_INDEX_OUTOFBOUNDS_ERROR</TT> will be returned.
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*/
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CAPI void U_EXPORT2
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ucnv_getInvalidChars (const UConverter * converter,
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char *errBytes,
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int8_t * len,
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UErrorCode * err);
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/**
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* Fills in the output parameter, errChars, with the error characters from the
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* last failing conversion.
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* @param converter: the Unicode converter
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* @param errUChars: the bytes in error
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* @param len: on input the capacity of errUChars, on output the number of UChars copied to it
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* @param err: the outgoing error status code.
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* If the substitution character array is too small, an
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* <TT>U_INDEX_OUTOFBOUNDS_ERROR</TT> will be returned.
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*/
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CAPI void U_EXPORT2
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ucnv_getInvalidUChars (const UConverter * converter,
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char *errUChars,
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int8_t * len,
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UErrorCode * err);
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/**
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* Resets the state of stateful conversion to the default state. This is used
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* in the case of error to restart a conversion from a known default state.
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* it will also empty the internal output buffers.
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* @param converter the Unicode converter
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*/
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CAPI void U_EXPORT2
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ucnv_reset (UConverter * converter);
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/**
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* Returns the maximum length of bytes used by a character. This varies between 1 and 4
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* @param converter the Unicode converter
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* @return the maximum number of bytes allowed by this particular converter
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* @see ucnv_getMinCharSize
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*/
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CAPI int8_t U_EXPORT2
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ucnv_getMaxCharSize (const UConverter * converter);
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/**
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* Returns the minimum byte length for characters in this codepage. This is either
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* 1 or 2 for all supported codepages.
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* @param converter the Unicode converter
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* @return the minimum number of bytes allowed by this particular converter
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* @see ucnv_getMaxCharSize
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*/
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CAPI int8_t U_EXPORT2
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ucnv_getMinCharSize (const UConverter * converter);
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/**
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* Returns the display name of the converter passed in based on the Locale passed in,
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* in the case the locale contains no display name, the internal ASCII name will be
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* filled in.
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* @param converter the Unicode converter.
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* @param displayLocale is the specific Locale we want to localised for
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* @param displayName user provided buffer to be filled in
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* @param displayNameCapacty size of displayName Buffer
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* @param err: outgoing error code.
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* @return displayNameLength number of UChar needed in displayName
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* @see ucnv_getName
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*/
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CAPI
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int32_t U_EXPORT2 ucnv_getDisplayName (const UConverter * converter,
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const char *displayLocale,
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UChar * displayName,
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int32_t displayNameCapacity,
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UErrorCode * err);
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/**
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* Gets the name of the converter (zero-terminated).
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* the name will be the internal name of the converter, the lifetime of the returned
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* string will be that of the converter passed to this function.
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* @param converter the Unicode converter
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* @param err UErrorCode status
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* @return the internal name of the converter
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* @see ucnv_getDisplayName
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*/
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CAPI
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const char * U_EXPORT2 ucnv_getName (const UConverter * converter, UErrorCode * err);
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/**
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* Gets a codepage number associated with the converter. This is not guaranteed
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* to be the one used to create the converter. Some converters do not represent
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* IBM registered codepages and return zero for the codepage number.
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* The error code fill-in parameter indicates if the codepage number is available.
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* @param converter the Unicode converter
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* @param err the error status code.
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* the converter is <TT>NULL</TT> or if converter's data table is <TT>NULL</TT>.
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* @return If any error occurrs, -1 will be returned otherwise, the codepage number
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* will be returned
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*/
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CAPI int32_t U_EXPORT2
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ucnv_getCCSID (const UConverter * converter,
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UErrorCode * err);
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/**
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* Gets a codepage platform associated with the converter. Currently, only <TT>IBM</TT> is supported
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* The error code fill-in parameter indicates if the codepage number is available.
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* @param converter the Unicode converter
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* @param err the error status code.
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* the converter is <TT>NULL</TT> or if converter's data table is <TT>NULL</TT>.
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* @return The codepage platform
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*/
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CAPI UCNV_PLATFORM U_EXPORT2
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ucnv_getPlatform (const UConverter * converter,
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UErrorCode * err);
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/**
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*Gets the type of conversion associated with the converter
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* e.g. SBCS, MBCS, DBCS, UTF8, UTF16_BE, UTF16_LE, ISO_2022, EBCDIC_STATEFUL, LATIN_1
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* @param converter: a valid, opened converter
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* @return the type of the converter
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*/
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CAPI UCNV_TYPE U_EXPORT2
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ucnv_getType (const UConverter * converter);
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/**
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*Gets the "starter" bytes for the converters of type MBCS
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*will fill in an <TT>U_ILLEGAL_ARGUMENT_ERROR</TT> if converter passed in
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*is not MBCS.
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*fills in an array of boolean, with the value of the byte as offset to the array.
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*At return, if TRUE is found in at offset 0x20, it means that the byte 0x20 is a starter byte
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*in this converter.
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* @param converter: a valid, opened converter of type MBCS
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* @param starters: an array of size 256 to be filled in
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* @param err: an array of size 256 to be filled in
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* @see ucnv_getType
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*/
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CAPI void U_EXPORT2 ucnv_getStarters(const UConverter* converter,
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bool_t starters[256],
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UErrorCode* err);
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/**
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* Gets the current calback function used by the converter when illegal or invalid sequence found.
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* @param converter the unicode converter
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* @return a pointer to the callback function
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* @see ucnv_setToUCallBack
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*/
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CAPI UCNV_ToUCallBack U_EXPORT2
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ucnv_getToUCallBack (const UConverter * converter);
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/**
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* Gets the current callback function used by the converter when illegal or invalid sequence found.
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* @param converter the unicode converter
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* @return a pointer to the callback function
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* @see ucnv_setFromUCallBack
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*/
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CAPI UCNV_FromUCallBack U_EXPORT2
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ucnv_getFromUCallBack (const UConverter * converter);
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/**
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* Gets the current callback function used by the converter when illegal or invalid sequence found
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* @param converter the unicode converter
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* @param action the callback function we want to set.
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* @param err The error code status
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* @return the previously assigned callback function pointer
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* @see ucnv_getToUCallBack
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*/
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CAPI UCNV_ToUCallBack U_EXPORT2
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ucnv_setToUCallBack (UConverter * converter,
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UCNV_ToUCallBack action,
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UErrorCode * err);
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/**
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* Gets the current callback function used by the converter when illegal or invalid sequence found
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* @param converter the unicode converter
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* @param action the callback function we want to set.
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* @param err The error code status
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* @return the previously assigned callback function pointer
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* @see ucnv_getFromUCallBack
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*/
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CAPI UCNV_FromUCallBack U_EXPORT2
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ucnv_setFromUCallBack (UConverter * converter,
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UCNV_FromUCallBack action,
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UErrorCode * err);
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/**
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* Transcodes an array of unicode characters to an array of codepage characters.
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* The source pointer is an I/O parameter, it starts out pointing where the function is
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* to begin transcoding, and ends up pointing after the first sequence of the bytes
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* that it encounters that are semantically invalid.
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* if ucnv_setToUCallBack is called with an action other than <TT>STOP</TT>
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* before a call is made to this API, <TT>consumed</TT> and <TT>source</TT> should point to the same place
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* (unless <TT>target</TT> ends with an imcomplete sequence of bytes and <TT>flush</TT> is <TT>FALSE</TT>).
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* the <TT>target</TT> buffer buffer needs to be a least the size of the maximum # of bytes per characters
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* allowed by the target codepage.
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* @param converter the Unicode converter
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* @param converter the Unicode converter
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* @param target : I/O parameter. Input : Points to the beginning of the buffer to copy
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* codepage characters to. Output : points to after the last codepage character copied
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* to <TT>target</TT>.
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* @param targetLimit the pointer to the end of the <TT>target</TT> array
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* @param source the source Unicode character array
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* @param sourceLimit the pointer to the end of the source array
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* @param offsets if NULL is passed, nothing will happen to it, otherwise it needs to have the same number
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* of allocated cells as <TT>target</TT>. Will fill in offsets from target to source pointer
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* 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>
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* For output data carried across calls -1 will be placed for offsets.
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* @param flush <TT>TRUE</TT> if the buffer is the last buffer of the conversion interation
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* and the conversion will finish with this call, FALSE otherwise.
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* @param err the error status. <TT>U_ILLEGAL_ARGUMENT_ERROR</TT> will be returned if the
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* converter is <TT>NULL</TT>.
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* @see ucnv_fromUChars
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* @see ucnv_convert
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* @see ucnv_getMinCharSize
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* @see ucnv_setToUCallBack
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*/
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CAPI
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void U_EXPORT2 ucnv_fromUnicode (UConverter * converter,
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char **target,
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const char *targetLimit,
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const UChar ** source,
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const UChar * sourceLimit,
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int32_t* offsets,
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bool_t flush,
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UErrorCode * err);
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/**
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* Converts an array of codepage characters into an array of unicode characters.
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* The source pointer is an I/O parameter, it starts out pointing at the place
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* to begin translating, and ends up pointing after the first sequence of the bytes
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* that it encounters that are semantically invalid.
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* if ucnv_setFromUCallBack is called with an action other than STOP
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* before a call is made to this API, consumed and source should point to the same place
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* (unless target ends with an imcomplete sequence of bytes and flush is FALSE).
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* @param converter the Unicode converter
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* @param target : I/O parameter. Input : Points to the beginning of the buffer to copy
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* Unicode characters to. Output : points to after the last UChar copied to target.
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* @param targetLimit the pointer to the end of the target array
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* @param source the source codepage character array
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* @param sourceLimit the pointer to the end of the source array
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* @param offsets if NULL is passed, nothing will happen to it, otherwise it needs to have the same number
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* of allocated cells as <TT>target</TT>. Will fill in offsets from target to source pointer
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* 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>
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* For output data carried across calls -1 will be placed for offsets.
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* @param flush TRUE if the buffer is the last buffer and the conversion will finish
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* in this call, FALSE otherwise.
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* @param err the error code status <TT>U_ILLEGAL_ARGUMENT_ERROR</TT> will be returned if the
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* converter is <TT>NULL</TT>, or if <TT>targetLimit</TT> and <TT>sourceLimit</TT> are misaligned.
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* @see ucnv_toUChars
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* @see ucnv_getNextUChar
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* @see ucnv_convert
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* @see ucnv_setFromUCallBack
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*/
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CAPI
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void U_EXPORT2 ucnv_toUnicode (UConverter * converter,
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UChar ** target,
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const UChar * targetLimit,
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const char **source,
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const char *sourceLimit,
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int32_t* offsets,
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bool_t flush,
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UErrorCode * err);
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/**
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* Transcodes the source Unicode string to the target string in a codepage encoding
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* with the specified Unicode converter. For example, if a Unicode to/from JIS
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* converter is specified, the source string in Unicode will be transcoded to JIS
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* encoding. The result will be stored in JIS encoding.
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* if any problems during conversion are encountered it will SUBSTITUTE with the default (initial)
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* substitute characters.
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* This function is a more convenient but less efficient version of \Ref{ucnv_fromUnicode}.
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* @param converter the Unicode converter
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* @param source the <TT>source</TT> Unicode string (zero Terminated)
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* @param target the <TT>target</TT> string in codepage encoding (<STRONG>not zero-terminated</STRONG> because some
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* codepage do not use '\0' as a string terminator
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* @param targetCapacity Input the number of bytes available in the <TT>target</TT> buffer
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* @param err the error status code.
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* <TT>U_INDEX_OUTOFBOUNDS_ERROR</TT> will be returned if the
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* the # of bytes provided are not enough for transcoding.
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* <TT>U_ILLEGAL_ARGUMENT_ERROR</TT> is returned if the converter is <TT>NULL</TT> or the source or target string is empty.
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* <TT>U_BUFFER_OVERFLOW_ERROR</TT> when <TT>targetSize</TT> turns out to be bigger than <TT>targetCapacity</TT>
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* @return number of bytes needed in target, regardless of <TT>targetCapacity</TT>
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* @see ucnv_fromUnicode
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* @see ucnv_convert
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*/
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CAPI
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int32_t U_EXPORT2 ucnv_fromUChars (const UConverter * converter,
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char *target,
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int32_t targetCapacity,
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const UChar * source,
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UErrorCode * err);
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/**
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* Transcode the source string in codepage encoding to the target string in
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* Unicode encoding. For example, if a Unicode to/from JIS
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* converter is specified, the source string in JIS encoding will be transcoded
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* to Unicode and placed into a provided target buffer.
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* if any problems during conversion are encountered it will SUBSTITUTE with the Unicode REPLACEMENT char
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* We recomment, the size of the target buffer needs to be at least as long as the maximum # of bytes per char
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* in this character set.
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* A zero-terminator will be placed at the end of the target buffer
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* This function is a more convenient but less efficient version of \Ref{ucnv_toUnicode}.
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* @param converter the Unicode converter
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* @param source the source string in codepage encoding
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* @param target the target string in Unicode encoding
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* @param targetCapacity capacity of the target buffer
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* @param sourceSize : Number of bytes in <TT>source</TT> to be transcoded
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* @param err the error status code
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* <TT>U_MEMORY_ALLOCATION_ERROR</TT> will be returned if the
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* the internal process buffer cannot be allocated for transcoding.
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* <TT>U_ILLEGAL_ARGUMENT_ERROR</TT> is returned if the converter is <TT>NULL</TT> or
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* if the source or target string is empty.
|
|
* <TT>U_BUFFER_OVERFLOW_ERROR</TT> when the input buffer is prematurely exhausted and targetSize non-<TT>NULL</TT>.
|
|
* @return the number of UChar needed in target (including the zero terminator)
|
|
* @see ucnv_getNextUChar
|
|
* @see ucnv_toUnicode
|
|
* @see ucnv_convert
|
|
*/
|
|
CAPI
|
|
int32_t U_EXPORT2 ucnv_toUChars (const UConverter * converter,
|
|
UChar * target,
|
|
int32_t targetCapacity,
|
|
const char *source,
|
|
int32_t sourceSize,
|
|
UErrorCode * err);
|
|
|
|
/********************************
|
|
* Will convert a codepage buffer one character at a time.
|
|
* This function was written to be efficient when transcoding small amounts of data at a time.
|
|
* In that case it will be more efficient than \Ref{ucnv_toUnicode}.
|
|
* When converting large buffers use \Ref{ucnv_toUnicode}.
|
|
*@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 points to the end of the input buffer
|
|
*@param err fills in error status (see ucnv_toUnicode)
|
|
*@return a UChar resulting from the partial conversion of source
|
|
*@see ucnv_toUnicode
|
|
*@see ucnv_toUChars
|
|
*@see ucnv_convert
|
|
*/
|
|
CAPI
|
|
UChar U_EXPORT2 ucnv_getNextUChar (UConverter * converter,
|
|
const char **source,
|
|
const char *sourceLimit,
|
|
UErrorCode * err);
|
|
|
|
|
|
/**************************
|
|
* Will convert a sequence of bytes from one codepage to another.
|
|
* This is <STRONG>NOT AN EFFICIENT</STRONG> way to transcode.
|
|
* use \Ref{ucnv_toUnicode} and \Ref{ucnv_fromUnicode} for efficiency
|
|
* @param toConverterName: The name of the converter that will be used to encode the output buffer
|
|
* @param fromConverterName: The name of the converter that will be used to decode the input buffer
|
|
* @param target: Pointer to the output buffer to write to
|
|
* @param targetCapacity: on input contains the capacity of target
|
|
* @param source: Pointer to the input buffer
|
|
* @param sourceLength: on input contains the capacity of source
|
|
* @param err: fills in an error status
|
|
* @return will be filled in with the number of bytes needed in target
|
|
* @see ucnv_fromUnicode
|
|
* @see ucnv_toUnicode
|
|
* @see ucnv_fromUChars
|
|
* @see ucnv_toUChars
|
|
* @see ucnv_getNextUChar
|
|
*/
|
|
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 * err);
|
|
|
|
/**
|
|
* SYSTEM API
|
|
* Iterates through every cached converter and frees all the unused ones.
|
|
* @return the number of cached converters successfully deleted
|
|
*/
|
|
CAPI int32_t U_EXPORT2 ucnv_flushCache (void);
|
|
|
|
|
|
/**
|
|
* provides a string containing the internal name (based on the alias file) of the converter.
|
|
* given an index.
|
|
* @param index the number of converters available on the system (<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
|
|
*/
|
|
CAPI
|
|
const char * U_EXPORT2 ucnv_getAvailableName (int32_t index);
|
|
|
|
/**
|
|
* returns the number of available converters.
|
|
* @return the number of available converters
|
|
* @see ucnv_getAvailableName
|
|
*/
|
|
CAPI int32_t U_EXPORT2 ucnv_countAvailable (void);
|
|
|
|
/**
|
|
* returns the current default converter name.
|
|
* @return returns the current default converter name
|
|
* @see ucnv_setDefaultName
|
|
*/
|
|
CAPI const char * U_EXPORT2 ucnv_getDefaultName (void);
|
|
|
|
/**
|
|
* sets the current default converter name.
|
|
* The lifetime of the return ptr is that of the library
|
|
* @param name: the converter name you want as default (has to appear in alias file)
|
|
* @see ucnv_getDefaultName
|
|
*
|
|
*/
|
|
CAPI void U_EXPORT2 ucnv_setDefaultName (const char *name);
|
|
|
|
|
|
#endif
|
|
/*_UCNV*/
|