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ICU-1896 Create the list of available converters at run-time.

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X-SVN-Rev: 8606
This commit is contained in:
George Rhoten 2002-05-13 21:21:19 +00:00
parent 732150e67b
commit ea1dbdf021
1 changed files with 48 additions and 4 deletions
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52
icu4c/source/common/ucnv_io.c
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@ -83,6 +83,9 @@ static const char DATA_TYPE[] = "dat";
static UDataMemory *aliasData=NULL;
static const uint16_t *aliasTable=NULL;
static const char **availableConverters = NULL;
static uint16_t availableConverterCount = 0;
static const uint16_t *converterTable = NULL;
static const uint16_t *tagTable = NULL;
@ -167,8 +170,15 @@ ucnv_io_cleanup()
{
if (aliasData) {
udata_close(aliasData);
aliasData = NULL;
}
if (availableConverters) {
uprv_free((char **)availableConverters);
availableConverters = NULL;
}
availableConverterCount = 0;
aliasData = NULL;
aliasTable = NULL;
@ -396,10 +406,42 @@ ucnv_getStandardName(const char *alias, const char *standard, UErrorCode *pError
return NULL;
}
static void ucnv_io_loadAvailableConverterList(void) {
uint16_t idx = 0;
uint16_t localConverterCount = 0;
UErrorCode status;
char *converterName;
/* We can't have more than "*converterTable" converters to open */
char **localConverterList = (char **) uprv_malloc(*converterTable * sizeof(char*));
for (; idx < *converterTable; idx++) {
status = U_ZERO_ERROR;
converterName = (char *)aliasTable+converterTable[1+2*idx];
ucnv_close(ucnv_open(converterName, &status));
if (U_SUCCESS(status)) {
localConverterList[localConverterCount++] = converterName;
}
}
umtx_lock(NULL);
if (availableConverters == NULL) {
availableConverters = localConverterList;
availableConverterCount = localConverterCount;
}
else {
uprv_free(localConverterList);
}
umtx_unlock(NULL);
}
U_CFUNC uint16_t
ucnv_io_countAvailableConverters(UErrorCode *pErrorCode) {
if(haveAliasData(pErrorCode)) {
return *converterTable;
if (availableConverters == NULL) {
ucnv_io_loadAvailableConverterList();
}
return availableConverterCount;
}
return 0;
}
@ -407,9 +449,11 @@ ucnv_io_countAvailableConverters(UErrorCode *pErrorCode) {
U_CFUNC const char *
ucnv_io_getAvailableConverter(uint16_t n, UErrorCode *pErrorCode) {
if(haveAliasData(pErrorCode)) {
const uint16_t *p=converterTable;
if(n<*p) {
return (const char *)aliasTable+p[1+2*n];
if (availableConverters == NULL) {
ucnv_io_loadAvailableConverterList();
}
if(n < availableConverterCount) {
return availableConverters[n];
}
}
return NULL;