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ICU-5235 make ucnv_open("UTF-8") faster

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X-SVN-Rev: 19739
This commit is contained in:
Markus Scherer 2006-06-17 13:53:07 +00:00
parent 23fc923706
commit 5fa5991579
1 changed files with 11 additions and 0 deletions
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11
icu4c/source/common/ucnv_bld.c
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@ -688,6 +688,17 @@ ucnv_loadSharedData(const char *converterName, UConverterLookupData *lookup, UEr
checkForAlgorithmic = FALSE;
mayContainOption = gDefaultConverterContainsOption;
/* the default converter name is already canonical */
} else if(
(converterName[0] == 'U' ?
( converterName[1] == 'T' && converterName[2] == 'F') :
(converterName[0] == 'u' && converterName[1] == 't' && converterName[2] == 'f'))
&&
(converterName[3] == '-' ?
(converterName[4] == '8' && converterName[5] == 0) :
(converterName[3] == '8' && converterName[4] == 0))
) {
/* fastpath for UTF-8 */
return (UConverterSharedData *)converterData[UCNV_UTF8];
} else {
/* separate the converter name from the options */
parseConverterOptions(converterName, lookup->cnvName, lookup->locale, &lookup->options, err);