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/*
**********************************************************************
* Copyright (C) 1999-2011, International Business Machines
* Corporation and others. All Rights Reserved.
**********************************************************************
*
*
* ucnv_imp.h:
* Contains all internal and external data structure definitions
* Created & Maitained by Bertrand A. Damiba
*
*
*
* ATTENTION:
* ---------
* Although the data structures in this file are open and stack allocatable
* we reserve the right to hide them in further releases.
*/
#ifndef UCNV_IMP_H
#define UCNV_IMP_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_CONVERSION
#include "unicode/uloc.h"
#include "ucnv_bld.h"
/*
* Fast check for whether a charset name is "UTF-8".
* This does not recognize all of the variations that ucnv_open()
* and other functions recognize, but it covers most cases.
* @param name const char * charset name
* @return
*/
#define UCNV_FAST_IS_UTF8(name) \
(((name[0]=='U' ? \
( name[1]=='T' && name[2]=='F') : \
(name[0]=='u' && name[1]=='t' && name[2]=='f'))) \
&& (name[3]=='-' ? \
(name[4]=='8' && name[5]==0) : \
(name[3]=='8' && name[4]==0)))
typedef struct {
char cnvName[UCNV_MAX_CONVERTER_NAME_LENGTH];
char locale[ULOC_FULLNAME_CAPACITY];
uint32_t options;
} UConverterNamePieces;
U_CFUNC UBool
ucnv_canCreateConverter(const char *converterName, UErrorCode *err);
/* figures out if we need to go to file to read in the data tables.
* @param converterName The name of the converter
* @param err The error code
* @return the newly created converter
*/
U_CAPI UConverter *
ucnv_createConverter(UConverter *myUConverter, const char *converterName, UErrorCode * err);
/*
* Open a purely algorithmic converter, specified by a type constant.
* @param myUConverter NULL, or pre-allocated UConverter structure to avoid
* a memory allocation
* @param type requested converter type
* @param locale locale parameter, or ""
* @param options converter options bit set (default 0)
* @param err ICU error code, not tested for U_FAILURE on input
* because this is an internal function
* @internal
*/
U_CFUNC UConverter *
ucnv_createAlgorithmicConverter(UConverter *myUConverter,
UConverterType type,
const char *locale, uint32_t options,
UErrorCode *err);
/*
* Creates a converter from shared data.
* Adopts mySharedConverterData: No matter what happens, the caller must not
* unload mySharedConverterData, except via ucnv_close(return value)
* if this function is successful.
*/
U_CFUNC UConverter *
ucnv_createConverterFromSharedData(UConverter *myUConverter,
UConverterSharedData *mySharedConverterData,
UConverterLoadArgs *pArgs,
UErrorCode *err);
U_CFUNC UConverter *
ucnv_createConverterFromPackage(const char *packageName, const char *converterName, UErrorCode *err);
/**
* Load a converter but do not create a UConverter object.
* Simply return the UConverterSharedData.
* Performs alias lookup etc.
* The UConverterNamePieces need not be initialized
* before calling this function.
* The UConverterLoadArgs must be initialized
* before calling this function.
* If the args are passed in, then the pieces must be passed in too.
* In other words, the following combinations are allowed:
* - pieces==NULL && args==NULL
* - pieces!=NULL && args==NULL
* - pieces!=NULL && args!=NULL
* @internal
*/
U_CFUNC UConverterSharedData *
ucnv_loadSharedData(const char *converterName,
UConverterNamePieces *pieces,
UConverterLoadArgs *pArgs,
UErrorCode * err);
/**
* This may unload the shared data in a thread safe manner.
* This will only unload the data if no other converters are sharing it.
*/
U_CFUNC void
ucnv_unloadSharedDataIfReady(UConverterSharedData *sharedData);
/**
* This is a thread safe way to increment the reference count.
*/
U_CFUNC void
ucnv_incrementRefCount(UConverterSharedData *sharedData);
/**
* These are the default error handling callbacks for the charset conversion framework.
* For performance reasons, they are only called to handle an error (not normally called for a reset or close).
*/
#define UCNV_TO_U_DEFAULT_CALLBACK ((UConverterToUCallback) UCNV_TO_U_CALLBACK_SUBSTITUTE)
#define UCNV_FROM_U_DEFAULT_CALLBACK ((UConverterFromUCallback) UCNV_FROM_U_CALLBACK_SUBSTITUTE)
#endif
#endif /* _UCNV_IMP */
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