251 lines
9.8 KiB
C
251 lines
9.8 KiB
C
/*
|
|
**********************************************************************
|
|
* Copyright (C) 1999-2004, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
**********************************************************************
|
|
*
|
|
*
|
|
* ucnv_bld.h:
|
|
* Contains internal data structure definitions
|
|
* Created by Bertrand A. Damiba
|
|
*
|
|
* Change history:
|
|
*
|
|
* 06/29/2000 helena Major rewrite of the callback APIs.
|
|
*/
|
|
|
|
#ifndef UCNV_BLD_H
|
|
#define UCNV_BLD_H
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
#if !UCONFIG_NO_CONVERSION
|
|
|
|
#include "unicode/ucnv.h"
|
|
#include "unicode/ucnv_err.h"
|
|
#include "ucnv_cnv.h"
|
|
#include "ucnvmbcs.h"
|
|
#include "ucnv_ext.h"
|
|
#include "udataswp.h"
|
|
|
|
/* size of the overflow buffers in UConverter, enough for escaping callbacks */
|
|
#define UCNV_ERROR_BUFFER_LENGTH 32
|
|
|
|
/* at most 4 bytes per substitution character (part of .cnv file format! see UConverterStaticData) */
|
|
#define UCNV_MAX_SUBCHAR_LEN 4
|
|
|
|
/* at most 8 bytes per character in toUBytes[] (UTF-8 uses up to 6) */
|
|
#define UCNV_MAX_CHAR_LEN 8
|
|
|
|
/* converter options bits */
|
|
#define UCNV_OPTION_VERSION 0xf
|
|
#define UCNV_OPTION_SWAP_LFNL 0x10
|
|
|
|
|
|
U_CDECL_BEGIN /* We must declare the following as 'extern "C"' so that if ucnv
|
|
itself is compiled under C++, the linkage of the funcptrs will
|
|
work.
|
|
*/
|
|
|
|
union UConverterTable {
|
|
UConverterMBCSTable mbcs;
|
|
};
|
|
|
|
typedef union UConverterTable UConverterTable;
|
|
|
|
struct UConverterImpl;
|
|
typedef struct UConverterImpl UConverterImpl;
|
|
|
|
/** values for the unicodeMask */
|
|
#define UCNV_HAS_SUPPLEMENTARY 1
|
|
#define UCNV_HAS_SURROGATES 2
|
|
|
|
typedef struct UConverterStaticData { /* +offset: size */
|
|
uint32_t structSize; /* +0: 4 Size of this structure */
|
|
|
|
char name
|
|
[UCNV_MAX_CONVERTER_NAME_LENGTH]; /* +4: 60 internal name of the converter- invariant chars */
|
|
|
|
int32_t codepage; /* +64: 4 codepage # (now IBM-$codepage) */
|
|
|
|
int8_t platform; /* +68: 1 platform of the converter (only IBM now) */
|
|
int8_t conversionType; /* +69: 1 conversion type */
|
|
|
|
int8_t minBytesPerChar; /* +70: 1 Minimum # bytes per char in this codepage */
|
|
int8_t maxBytesPerChar; /* +71: 1 Maximum # bytes output per UChar in this codepage */
|
|
|
|
uint8_t subChar[UCNV_MAX_SUBCHAR_LEN]; /* +72: 4 [note: 4 and 8 byte boundary] */
|
|
int8_t subCharLen; /* +76: 1 */
|
|
|
|
uint8_t hasToUnicodeFallback; /* +77: 1 UBool needs to be changed to UBool to be consistent across platform */
|
|
uint8_t hasFromUnicodeFallback; /* +78: 1 */
|
|
uint8_t unicodeMask; /* +79: 1 bit 0: has supplementary bit 1: has single surrogates */
|
|
uint8_t subChar1; /* +80: 1 single-byte substitution character for IBM MBCS (0 if none) */
|
|
uint8_t reserved[19]; /* +81: 19 to round out the structure */
|
|
/* total size: 100 */
|
|
} UConverterStaticData;
|
|
|
|
/*
|
|
* Defines the UConverterSharedData struct,
|
|
* the immutable, shared part of UConverter.
|
|
*/
|
|
struct UConverterSharedData {
|
|
uint32_t structSize; /* Size of this structure */
|
|
uint32_t referenceCounter; /* used to count number of clients, 0xffffffff for static SharedData */
|
|
|
|
const void *dataMemory; /* from udata_openChoice() - for cleanup */
|
|
void *table; /* Unused. This used to be a UConverterTable - Pointer to conversion data - see mbcs below */
|
|
|
|
const UConverterStaticData *staticData; /* pointer to the static (non changing) data. */
|
|
|
|
UBool sharedDataCached; /* TRUE: shared data is in cache, don't destroy on ucnv_close() if 0 ref. FALSE: shared data isn't in the cache, do attempt to clean it up if the ref is 0 */
|
|
/*UBool staticDataOwned; TRUE if static data owned by shared data & should be freed with it, NEVER true for udata() loaded statics. This ignored variable was removed to make space for sharedDataCached. */
|
|
|
|
const UConverterImpl *impl; /* vtable-style struct of mostly function pointers */
|
|
|
|
/*initial values of some members of the mutable part of object */
|
|
uint32_t toUnicodeStatus;
|
|
|
|
/*
|
|
* Shared data structures currently come in two flavors:
|
|
* - readonly for built-in algorithmic converters
|
|
* - allocated for MBCS, with a pointer to an allocated UConverterTable
|
|
* which always has a UConverterMBCSTable
|
|
*
|
|
* To eliminate one allocation, I am making the UConverterMBCSTable
|
|
* a member of the shared data. It is the last member so that static
|
|
* definitions of UConverterSharedData work as before.
|
|
* The table field above also remains to avoid updating all static
|
|
* definitions, but is now unused.
|
|
*
|
|
* markus 2003-nov-07
|
|
*/
|
|
UConverterMBCSTable mbcs;
|
|
};
|
|
|
|
/* Defines a UConverter, the lightweight mutable part the user sees */
|
|
|
|
struct UConverter {
|
|
/*
|
|
* Error function pointer called when conversion issues
|
|
* occur during a ucnv_fromUnicode call
|
|
*/
|
|
void (U_EXPORT2 *fromUCharErrorBehaviour) (const void *context,
|
|
UConverterFromUnicodeArgs *args,
|
|
const UChar *codeUnits,
|
|
int32_t length,
|
|
UChar32 codePoint,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode *);
|
|
/*
|
|
* Error function pointer called when conversion issues
|
|
* occur during a ucnv_toUnicode call
|
|
*/
|
|
void (U_EXPORT2 *fromCharErrorBehaviour) (const void *context,
|
|
UConverterToUnicodeArgs *args,
|
|
const char *codeUnits,
|
|
int32_t length,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode *);
|
|
|
|
/*
|
|
* Pointer to additional data that depends on the converter type.
|
|
* Used by ISO 2022, SCSU, GB 18030 converters, possibly more.
|
|
*/
|
|
void *extraInfo;
|
|
|
|
const void *fromUContext;
|
|
const void *toUContext;
|
|
|
|
UConverterSharedData *sharedData; /* Pointer to the shared immutable part of the converter object */
|
|
|
|
uint32_t options; /* options flags from UConverterOpen, may contain additional bits */
|
|
|
|
UBool sharedDataIsCached; /* TRUE: shared data is in cache, don't destroy on ucnv_close() if 0 ref. FALSE: shared data isn't in the cache, do attempt to clean it up if the ref is 0 */
|
|
UBool isCopyLocal; /* TRUE if UConverter is not owned and not released in ucnv_close() (stack-allocated, safeClone(), etc.) */
|
|
UBool isExtraLocal; /* TRUE if extraInfo is not owned and not released in ucnv_close() (stack-allocated, safeClone(), etc.) */
|
|
|
|
UBool useFallback;
|
|
int8_t toULength; /* number of bytes in toUBytes */
|
|
uint8_t toUBytes[UCNV_MAX_CHAR_LEN-1];/* more "toU status"; keeps the bytes of the current character */
|
|
uint32_t toUnicodeStatus; /* Used to internalize stream status information */
|
|
int32_t mode;
|
|
uint32_t fromUnicodeStatus;
|
|
|
|
/*
|
|
* More fromUnicode() status. Serves 3 purposes:
|
|
* - keeps a lead surrogate between buffers (similar to toUBytes[])
|
|
* - keeps a lead surrogate at the end of the stream,
|
|
* which the framework handles as truncated input
|
|
* - if the fromUnicode() implementation returns to the framework
|
|
* (ucnv.c ucnv_fromUnicode()), then the framework calls the callback
|
|
* for this code point
|
|
*/
|
|
UChar32 fromUChar32;
|
|
|
|
/*
|
|
* value for ucnv_getMaxCharSize()
|
|
*
|
|
* usually simply copied from the static data, but ucnvmbcs.c modifies
|
|
* the value depending on the converter type and options
|
|
*/
|
|
int8_t maxBytesPerUChar;
|
|
|
|
int8_t subCharLen; /* length of the codepage specific character sequence */
|
|
int8_t invalidCharLength;
|
|
int8_t charErrorBufferLength; /* number of valid bytes in charErrorBuffer */
|
|
|
|
int8_t invalidUCharLength;
|
|
int8_t UCharErrorBufferLength; /* number of valid UChars in charErrorBuffer */
|
|
|
|
uint8_t subChar1; /* single-byte substitution character if different from subChar */
|
|
UBool useSubChar1;
|
|
uint8_t subChar[UCNV_MAX_SUBCHAR_LEN]; /* codepage specific character sequence */
|
|
char invalidCharBuffer[UCNV_MAX_CHAR_LEN]; /* bytes from last error/callback situation */
|
|
uint8_t charErrorBuffer[UCNV_ERROR_BUFFER_LENGTH]; /* codepage output from Error functions */
|
|
|
|
UChar invalidUCharBuffer[U16_MAX_LENGTH]; /* UChars from last error/callback situation */
|
|
UChar UCharErrorBuffer[UCNV_ERROR_BUFFER_LENGTH]; /* unicode output from Error functions */
|
|
|
|
/* fields for conversion extension */
|
|
|
|
/* store previous UChars/chars to continue partial matches */
|
|
UChar32 preFromUFirstCP; /* >=0: partial match */
|
|
UChar preFromU[UCNV_EXT_MAX_UCHARS];
|
|
char preToU[UCNV_EXT_MAX_BYTES];
|
|
int8_t preFromULength, preToULength; /* negative: replay */
|
|
int8_t preToUFirstLength; /* length of first character */
|
|
};
|
|
|
|
U_CDECL_END /* end of UConverter */
|
|
|
|
#define CONVERTER_FILE_EXTENSION ".cnv"
|
|
|
|
/**
|
|
* Load a non-algorithmic converter.
|
|
* If pkg==NULL, then this function must be called inside umtx_lock(&cnvCacheMutex).
|
|
*/
|
|
UConverterSharedData *
|
|
ucnv_load(UConverterLoadArgs *pArgs, UErrorCode *err);
|
|
|
|
/**
|
|
* Unload a non-algorithmic converter.
|
|
* It must be sharedData->referenceCounter != ~0
|
|
* and this function must be called inside umtx_lock(&cnvCacheMutex).
|
|
*/
|
|
void
|
|
ucnv_unload(UConverterSharedData *sharedData);
|
|
|
|
/**
|
|
* Swap ICU .cnv conversion tables. See udataswp.h.
|
|
* @internal
|
|
*/
|
|
U_CAPI int32_t U_EXPORT2
|
|
ucnv_swap(const UDataSwapper *ds,
|
|
const void *inData, int32_t length, void *outData,
|
|
UErrorCode *pErrorCode);
|
|
|
|
#endif
|
|
|
|
#endif /* _UCNV_BLD */
|