602 lines
20 KiB
C
602 lines
20 KiB
C
/*
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********************************************************************
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* COPYRIGHT:
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* Copyright (c) 1996-2001, International Business Machines Corporation and
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* others. All Rights Reserved.
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********************************************************************
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*
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* uconv_bld.c:
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*
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* Defines functions that are used in the creation/initialization/deletion
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* of converters and related structures.
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* uses uconv_io.h routines to access disk information
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* is used by ucnv.h to implement public API create/delete/flushCache routines
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* Modification History:
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*
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* Date Name Description
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*
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* 06/20/2000 helena OS/400 port changes; mostly typecast.
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* 06/29/2000 helena Major rewrite of the callback interface.
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*/
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#include "ucnv_io.h"
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#include "uhash.h"
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#include "ucnv_bld.h"
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#include "unicode/ucnv_err.h"
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#include "ucnv_cnv.h"
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#include "ucnv_imp.h"
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#include "unicode/udata.h"
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#include "unicode/ucnv.h"
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#include "umutex.h"
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#include "cstring.h"
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#include "cmemory.h"
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#include "ucln_cmn.h"
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#if 0
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#include <stdio.h>
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extern void UCNV_DEBUG_LOG(char *what, char *who, void *p, int l);
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#define UCNV_DEBUG_LOG(x,y,z) UCNV_DEBUG_LOG(x,y,z,__LINE__)
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#else
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# define UCNV_DEBUG_LOG(x,y,z)
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#endif
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static const UConverterSharedData * const
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converterData[UCNV_NUMBER_OF_SUPPORTED_CONVERTER_TYPES]={
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NULL, NULL, &_MBCSData, &_Latin1Data,
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&_UTF8Data, &_UTF16BEData, &_UTF16LEData, &_UTF32BEData, &_UTF32LEData,
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NULL, &_ISO2022Data,
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&_LMBCSData1,&_LMBCSData2, &_LMBCSData3, &_LMBCSData4, &_LMBCSData5, &_LMBCSData6,
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&_LMBCSData8,&_LMBCSData11,&_LMBCSData16,&_LMBCSData17,&_LMBCSData18,&_LMBCSData19,
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&_HZData, &_SCSUData, &_ISCIIData, &_ASCIIData, &_UTF7Data, &_Bocu1Data
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};
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static struct {
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const char *name;
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const UConverterType type;
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} const cnvNameType[] = {
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{ "ISO-8859-1", UCNV_LATIN_1 },
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{ "UTF-8", UCNV_UTF8 },
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{ "UTF-16BE", UCNV_UTF16_BigEndian },
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{ "UTF-16LE", UCNV_UTF16_LittleEndian },
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#if U_IS_BIG_ENDIAN
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{ "UTF-16", UCNV_UTF16_BigEndian },
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{ "UTF16_OppositeEndian", UCNV_UTF16_LittleEndian },
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#else
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{ "UTF-16", UCNV_UTF16_LittleEndian },
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{ "UTF16_OppositeEndian", UCNV_UTF16_BigEndian},
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#endif
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{ "UTF-32BE", UCNV_UTF32_BigEndian },
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{ "UTF-32LE", UCNV_UTF32_LittleEndian },
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#if U_IS_BIG_ENDIAN
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{ "UTF-32", UCNV_UTF32_BigEndian },
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{ "UTF32_OppositeEndian", UCNV_UTF32_LittleEndian },
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#else
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{ "UTF-32", UCNV_UTF32_LittleEndian },
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{ "UTF32_OppositeEndian", UCNV_UTF32_BigEndian},
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#endif
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{ "ISO_2022", UCNV_ISO_2022 },
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{ "LMBCS-1", UCNV_LMBCS_1 },
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{ "LMBCS-2", UCNV_LMBCS_2 },
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{ "LMBCS-3", UCNV_LMBCS_3 },
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{ "LMBCS-4", UCNV_LMBCS_4 },
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{ "LMBCS-5", UCNV_LMBCS_5 },
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{ "LMBCS-6", UCNV_LMBCS_6 },
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{ "LMBCS-8", UCNV_LMBCS_8 },
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{ "LMBCS-11",UCNV_LMBCS_11 },
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{ "LMBCS-16",UCNV_LMBCS_16 },
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{ "LMBCS-17",UCNV_LMBCS_17 },
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{ "LMBCS-18",UCNV_LMBCS_18 },
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{ "LMBCS-19",UCNV_LMBCS_19 },
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{ "HZ",UCNV_HZ },
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{ "SCSU", UCNV_SCSU },
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{ "ISCII", UCNV_ISCII },
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{ "US-ASCII", UCNV_US_ASCII },
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{ "UTF-7", UCNV_UTF7 },
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{ "BOCU-1", UCNV_BOCU1 }
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};
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/*Takes an alias name gets an actual converter file name
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*goes to disk and opens it.
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*allocates the memory and returns a new UConverter object
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*/
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static UConverterSharedData *createConverterFromFile (const char *converterName, UErrorCode * err);
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static const UConverterSharedData *getAlgorithmicTypeFromName (const char *realName);
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/**
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* Un flatten shared data from a UDATA..
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*/
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static UConverterSharedData* ucnv_data_unFlattenClone(UDataMemory *pData, UErrorCode *status);
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/*initializes some global variables */
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static UHashtable *SHARED_DATA_HASHTABLE = NULL;
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static UMTX cnvCacheMutex = NULL; /* Mutex for synchronizing cnv cache access. */
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/* Note: the global mutex is used for */
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/* reference count updates. */
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/* ucnv_cleanup - delete all storage held by the converter cache, except any in use */
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/* by open converters. */
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/* Not thread safe. */
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/* Not supported API. Marked U_CAPI only for use by test programs. */
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U_CAPI UBool U_EXPORT2 ucnv_cleanup(void) {
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if (SHARED_DATA_HASHTABLE != NULL) {
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ucnv_flushCache();
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if (SHARED_DATA_HASHTABLE != NULL && uhash_count(SHARED_DATA_HASHTABLE) == 0) {
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uhash_close(SHARED_DATA_HASHTABLE);
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SHARED_DATA_HASHTABLE = NULL;
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}
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}
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umtx_destroy(&cnvCacheMutex); /* Don't worry about destroying the mutex even */
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/* if the hash table still exists. The mutex */
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/* will lazily re-init itself if needed. */
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return (SHARED_DATA_HASHTABLE == NULL);
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}
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static UBool
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isCnvAcceptable(void *context,
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const char *type, const char *name,
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const UDataInfo *pInfo) {
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return (UBool)(
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pInfo->size>=20 &&
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pInfo->isBigEndian==U_IS_BIG_ENDIAN &&
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pInfo->charsetFamily==U_CHARSET_FAMILY &&
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pInfo->sizeofUChar==U_SIZEOF_UCHAR &&
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pInfo->dataFormat[0]==0x63 && /* dataFormat="cnvt" */
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pInfo->dataFormat[1]==0x6e &&
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pInfo->dataFormat[2]==0x76 &&
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pInfo->dataFormat[3]==0x74 &&
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pInfo->formatVersion[0]==6);
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}
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#define DATA_TYPE "cnv"
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static UConverterSharedData *createConverterFromFile (const char *fileName, UErrorCode * err)
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{
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UDataMemory *data;
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UConverterSharedData *sharedData;
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if (err == NULL || U_FAILURE (*err)) {
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return NULL;
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}
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data = udata_openChoice(NULL, DATA_TYPE, fileName, isCnvAcceptable, NULL, err);
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if(U_FAILURE(*err))
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{
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return NULL;
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}
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sharedData = ucnv_data_unFlattenClone(data, err);
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if(U_FAILURE(*err))
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{
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udata_close(data);
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return NULL;
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}
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return sharedData;
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}
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void
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ucnv_copyPlatformString(char *platformString, UConverterPlatform pltfrm)
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{
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switch (pltfrm)
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{
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case UCNV_IBM:
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{
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uprv_strcpy (platformString, "ibm");
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break;
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}
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default:
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{
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uprv_strcpy (platformString, "");
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break;
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}
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};
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return;
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}
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/*returns a converter type from a string
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*/
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static const UConverterSharedData *
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getAlgorithmicTypeFromName(const char *realName)
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{
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int i;
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for(i=0; i<sizeof(cnvNameType)/sizeof(cnvNameType[0]); ++i) {
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if(uprv_strcmp(realName, cnvNameType[i].name)==0) {
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return converterData[cnvNameType[i].type];
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}
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}
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return NULL;
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}
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/* Puts the shared data in the static hashtable SHARED_DATA_HASHTABLE */
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/* Will always be called with the cnvCacheMutex alrady being held */
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/* by the calling function. */
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void
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ucnv_shareConverterData(UConverterSharedData * data)
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{
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UErrorCode err = U_ZERO_ERROR;
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/*Lazy evaluates the Hashtable itself */
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/*void *sanity = NULL;*/
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if (SHARED_DATA_HASHTABLE == NULL)
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{
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SHARED_DATA_HASHTABLE = uhash_openSize (uhash_hashIChars, uhash_compareIChars,
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ucnv_io_countAvailableAliases(&err),
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&err);
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if (U_FAILURE(err))
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return;
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}
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/* ### check to see if the element is not already there! */
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/*
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sanity = ucnv_getSharedConverterData (data->staticData->name);
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if(sanity != NULL)
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{
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UCNV_DEBUG_LOG("put:overwrite!",data->staticData->name,sanity);
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}
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UCNV_DEBUG_LOG("put:chk",data->staticData->name,sanity);
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*/
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uhash_put(SHARED_DATA_HASHTABLE,
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(void*) data->staticData->name, /* Okay to cast away const as long as
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keyDeleter == NULL */
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data,
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&err);
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UCNV_DEBUG_LOG("put", data->staticData->name,data);
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}
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/* Look up a converter name in the shared data cache. */
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/* cnvCacheMutex must be held by the caller to protect the hash table. */
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UConverterSharedData *
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ucnv_getSharedConverterData(const char *name)
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{
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/*special case when no Table has yet been created we return NULL */
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if (SHARED_DATA_HASHTABLE == NULL)
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{
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return NULL;
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}
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else
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{
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UConverterSharedData *rc;
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rc = (UConverterSharedData*)uhash_get(SHARED_DATA_HASHTABLE, name);
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UCNV_DEBUG_LOG("get",name,rc);
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return rc;
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}
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}
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/*frees the string of memory blocks associates with a sharedConverter
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*if and only if the referenceCounter == 0
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*/
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UBool
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ucnv_deleteSharedConverterData(UConverterSharedData * deadSharedData)
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{
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if (deadSharedData->referenceCounter > 0)
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return FALSE;
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if (deadSharedData->impl->unload != NULL) {
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deadSharedData->impl->unload(deadSharedData);
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}
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if(deadSharedData->dataMemory != NULL)
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{
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UDataMemory *data = (UDataMemory*)deadSharedData->dataMemory;
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udata_close(data);
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}
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if(deadSharedData->table != NULL)
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{
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uprv_free(deadSharedData->table);
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}
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uprv_free(deadSharedData);
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return TRUE;
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}
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static void
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parseConverterOptions(const char *inName,
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char *cnvName, char *locale, uint32_t *pFlags) {
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char c;
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/* copy the converter name itself to cnvName */
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while((c=*inName)!=0 && c!=UCNV_OPTION_SEP_CHAR) {
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*cnvName++=c;
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++inName;
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}
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*cnvName=0;
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/* parse options */
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if(c==UCNV_OPTION_SEP_CHAR) {
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++inName;
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for(;;) {
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/* inName is behind an option separator */
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if(uprv_strncmp(inName, "locale=", 7)==0) {
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/* do not modify locale itself in case we have multiple locale options */
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char *dest=locale;
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/* copy the locale option value */
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inName+=7;
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for(;;) {
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c=*inName;
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if(c!=0) {
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++inName;
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if(c!=UCNV_OPTION_SEP_CHAR) {
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*dest++=c;
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} else {
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*dest=0;
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break;
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}
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} else {
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*dest=0;
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return;
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}
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}
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} else if(uprv_strncmp(inName, "version=", 8)==0) {
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/* copy the version option value into bits 3..0 of *pFlags */
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inName+=8;
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c=*inName;
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*pFlags=0;
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if(c==0) {
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return;
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} else if((uint8_t)(c-'0')<10) {
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*pFlags=c-'0';
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++inName;
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}
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/* add processing for new options here with another } else if(uprv_strncmp(inName, "option-name=", XX)==0) { */
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} else {
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/* ignore any other options until we define some */
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do {
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c=*inName++;
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if(c==0) {
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return;
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}
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} while(c!=UCNV_OPTION_SEP_CHAR);
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}
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}
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}
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}
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/*Logic determines if the converter is Algorithmic AND/OR cached
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*depending on that:
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* -we either go to get data from disk and cache it (Data=TRUE, Cached=False)
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* -Get it from a Hashtable (Data=X, Cached=TRUE)
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* -Call dataConverter initializer (Data=TRUE, Cached=TRUE)
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* -Call AlgorithmicConverter initializer (Data=FALSE, Cached=TRUE)
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*/
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UConverter *
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ucnv_createConverter (const char *converterName, UErrorCode * err)
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{
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char cnvName[100], locale[20];
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const char *realName;
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UConverter *myUConverter = NULL;
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UConverterSharedData *mySharedConverterData = NULL;
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UErrorCode internalErrorCode = U_ZERO_ERROR;
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uint32_t options=0;
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if (U_FAILURE (*err))
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return NULL;
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locale[0] = 0;
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/* In case "name" is NULL we want to open the default converter. */
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if (converterName == NULL) {
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realName = ucnv_io_getDefaultConverterName();
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if (realName == NULL) {
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*err = U_MISSING_RESOURCE_ERROR;
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return NULL;
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}
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/* the default converter name is already canonical */
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} else {
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/* separate the converter name from the options */
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parseConverterOptions(converterName, cnvName, locale,&options);
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/* get the canonical converter name */
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realName = ucnv_io_getConverterName(cnvName, &internalErrorCode);
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if (U_FAILURE(internalErrorCode) || realName == NULL) {
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/*
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* set the input name in case the converter was added
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* without updating the alias table, or when there is no alias table
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*/
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realName = cnvName;
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}
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}
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/* separate the converter name from the options */
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if(realName != cnvName) {
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parseConverterOptions(realName, cnvName, locale,&options);
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realName = cnvName;
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}
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/* get the shared data for an algorithmic converter, if it is one */
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mySharedConverterData = (UConverterSharedData *)getAlgorithmicTypeFromName (realName);
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if (mySharedConverterData == NULL)
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{
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/* it is a data-based converter, get its shared data. */
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/* Hold the cnvCacheMutex through the whole process of checking the */
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/* converter data cache, and adding new entries to the cache */
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/* to prevent other threads from modifying the cache during the */
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/* process. */
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umtx_lock(&cnvCacheMutex);
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mySharedConverterData = ucnv_getSharedConverterData (realName);
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if (mySharedConverterData == NULL)
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{
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/*Not cached, we need to stream it in from file */
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mySharedConverterData = createConverterFromFile (realName, err);
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if (U_FAILURE (*err) || (mySharedConverterData == NULL))
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{
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umtx_unlock(&cnvCacheMutex);
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return NULL;
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}
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else
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{
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/* share it with other library clients */
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ucnv_shareConverterData(mySharedConverterData);
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}
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}
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else
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{
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/* The data for this converter was already in the cache. */
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/* Update the reference counter on the shared data: one more client */
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umtx_lock (NULL);
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mySharedConverterData->referenceCounter++;
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umtx_unlock (NULL);
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}
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umtx_unlock(&cnvCacheMutex);
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}
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/* allocate the converter */
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myUConverter = (UConverter *) uprv_malloc (sizeof (UConverter));
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if (myUConverter == NULL)
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{
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if (mySharedConverterData->referenceCounter != ~0) {
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umtx_lock (NULL);
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--mySharedConverterData->referenceCounter;
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umtx_unlock (NULL);
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}
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*err = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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/* initialize the converter */
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uprv_memset(myUConverter, 0, sizeof(UConverter));
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myUConverter->sharedData = mySharedConverterData;
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myUConverter->mode = UCNV_SI;
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myUConverter->fromCharErrorBehaviour = (UConverterToUCallback) UCNV_TO_U_CALLBACK_SUBSTITUTE;
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myUConverter->fromUCharErrorBehaviour = (UConverterFromUCallback) UCNV_FROM_U_CALLBACK_SUBSTITUTE;
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myUConverter->toUnicodeStatus = myUConverter->sharedData->toUnicodeStatus;
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myUConverter->subChar1 = myUConverter->sharedData->staticData->subChar1;
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myUConverter->subCharLen = myUConverter->sharedData->staticData->subCharLen;
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uprv_memcpy (myUConverter->subChar, myUConverter->sharedData->staticData->subChar, myUConverter->subCharLen);
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if(myUConverter != NULL && myUConverter->sharedData->impl->open != NULL) {
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myUConverter->sharedData->impl->open(myUConverter, realName, locale,options, err);
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if(U_FAILURE(*err)) {
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ucnv_close(myUConverter);
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return NULL;
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}
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}
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return myUConverter;
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}
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static UConverterSharedData*
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ucnv_data_unFlattenClone(UDataMemory *pData, UErrorCode *status)
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{
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/* UDataInfo info; -- necessary only if some converters have different formatVersion */
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const uint8_t *raw = (const uint8_t *)udata_getMemory(pData);
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const UConverterStaticData *source = (const UConverterStaticData *) raw;
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|
UConverterSharedData *data;
|
|
UConverterType type = (UConverterType)source->conversionType;
|
|
|
|
if(U_FAILURE(*status))
|
|
return NULL;
|
|
|
|
if( (uint16_t)type >= UCNV_NUMBER_OF_SUPPORTED_CONVERTER_TYPES ||
|
|
converterData[type] == NULL ||
|
|
converterData[type]->referenceCounter != 1 ||
|
|
source->structSize != sizeof(UConverterStaticData))
|
|
{
|
|
*status = U_INVALID_TABLE_FORMAT;
|
|
return NULL;
|
|
}
|
|
|
|
#if 0
|
|
/* necessary only if some converters have different formatVersion; now everything is at version 5 */
|
|
/* test for the format version: MBCS is at version 5, the rest still at 4 */
|
|
info.size=sizeof(UDataInfo);
|
|
udata_getInfo(pData, &info);
|
|
if(type == UCNV_MBCS ? info.formatVersion[0] != 5 : info.formatVersion[0] != 4) {
|
|
*status = U_INVALID_TABLE_FORMAT;
|
|
return NULL;
|
|
}
|
|
#endif
|
|
|
|
data = (UConverterSharedData *)uprv_malloc(sizeof(UConverterSharedData));
|
|
if(data == NULL) {
|
|
*status = U_MEMORY_ALLOCATION_ERROR;
|
|
return NULL;
|
|
}
|
|
|
|
/* copy initial values from the static structure for this type */
|
|
uprv_memcpy(data, converterData[type], sizeof(UConverterSharedData));
|
|
|
|
/* ### it would be much more efficient if the table were a direct member, not a pointer */
|
|
data->table = (UConverterTable *)uprv_malloc(sizeof(UConverterTable));
|
|
if(data->table == NULL) {
|
|
uprv_free(data);
|
|
*status = U_MEMORY_ALLOCATION_ERROR;
|
|
return NULL;
|
|
}
|
|
|
|
data->staticData = source;
|
|
|
|
/* fill in fields from the loaded data */
|
|
data->dataMemory = (void*)pData; /* for future use */
|
|
|
|
if(data->impl->load != NULL) {
|
|
data->impl->load(data, raw + source->structSize, status);
|
|
if(U_FAILURE(*status)) {
|
|
uprv_free(data->table);
|
|
uprv_free(data);
|
|
return NULL;
|
|
}
|
|
}
|
|
return data;
|
|
}
|
|
|
|
/*Frees all shared immutable objects that aren't referred to (reference count = 0)
|
|
*/
|
|
U_CAPI int32_t U_EXPORT2
|
|
ucnv_flushCache ()
|
|
{
|
|
UConverterSharedData *mySharedData = NULL;
|
|
int32_t pos = -1;
|
|
int32_t tableDeletedNum = 0;
|
|
const UHashElement *e;
|
|
|
|
/*if shared data hasn't even been lazy evaluated yet
|
|
* return 0
|
|
*/
|
|
if (SHARED_DATA_HASHTABLE == NULL)
|
|
return 0;
|
|
|
|
/*creates an enumeration to iterate through every element in the
|
|
* table
|
|
*
|
|
* Synchronization: holding cnvCacheMutex will prevent any other thread from
|
|
* accessing or modifying the hash table during the iteration.
|
|
* The reference count of an entry may be decremented by
|
|
* ucnv_close while the iteration is in process, but this is
|
|
* benign. It can't be incremented (in ucnv_createConverter())
|
|
* because the sequence of looking up in the cache + incrementing
|
|
* is protected by cnvCacheMutex.
|
|
*/
|
|
umtx_lock (&cnvCacheMutex);
|
|
while ((e = uhash_nextElement (SHARED_DATA_HASHTABLE, &pos)) != NULL)
|
|
{
|
|
mySharedData = (UConverterSharedData *) e->value.pointer;
|
|
/*deletes only if reference counter == 0 */
|
|
if (mySharedData->referenceCounter == 0)
|
|
{
|
|
tableDeletedNum++;
|
|
|
|
UCNV_DEBUG_LOG("del",mySharedData->staticData->name,mySharedData);
|
|
|
|
uhash_removeElement(SHARED_DATA_HASHTABLE, e);
|
|
ucnv_deleteSharedConverterData (mySharedData);
|
|
}
|
|
}
|
|
umtx_unlock (&cnvCacheMutex);
|
|
|
|
return tableDeletedNum;
|
|
}
|
|
|