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ICU-7882 Add function to get shortest length subtag's size.

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X-SVN-Rev: 28674
This commit is contained in:
Michael Ow 2010-09-21 23:50:37 +00:00
parent 740bef0bc8
commit a998c7cac4
1 changed files with 36 additions and 1 deletions
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37
icu4c/source/common/uloc.c
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@ -529,7 +529,7 @@ static const VariantMap VARIANT_MAP[] = {
/* ### BCP47 Conversion *******************************************/
/* Test if the locale id has BCP47 u extension and does not have '@' */
#define _hasBCP47Extension(id) (id && uprv_strstr(id, "-u-") != NULL && uprv_strstr(id, "@") == NULL)
#define _hasBCP47Extension(id) (id && uprv_strstr(id, "@") == NULL && getMinimumSubtagLength(localeID) == 1)
/* Converts the BCP47 id to Unicode id. Does nothing to id if conversion fails */
#define _ConvertBCP47(finalID, id, buffer, length,err) \
if (uloc_forLanguageTag(id, buffer, length, NULL, err) <= 0 || U_FAILURE(*err)) { \
@ -537,6 +537,41 @@ static const VariantMap VARIANT_MAP[] = {
} else { \
finalID=buffer; \
}
/* Gets the size of the shortest subtag in the given localeID. */
static int32_t getMinimumSubtagLength(const char *localeID) {
const char *pTag;
const char *pNextTag;
int32_t localeIDLength = uprv_strlen(localeID);
int32_t length = localeIDLength;
int32_t tmpLength = 0;
pTag = localeID;
for (;;) {
if (pTag[0] == 0) {
/* Usually the case if localeID ends in a '-' or '_' */
break;
}
if ((!(pNextTag = uprv_strstr(pTag, "-")) && !(pNextTag = uprv_strstr(pTag, "_")))) {
/* Get the length of the last subtag */
tmpLength = localeIDLength - (pTag - localeID);
} else {
tmpLength = pNextTag - pTag;
/* Move the pointer to character after the '-' or '_' character */
pTag = pNextTag+1;
}
if (tmpLength != 0 && tmpLength < length) {
length = tmpLength;
}
if (!pNextTag) {
break;
}
}
return length;
}
/* ### Keywords **************************************************/