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ICU-1439 implement ucnv_getUnicodeSet() for roundtrippable code points for all ISCII versions.

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ISCII can switch between scipts.

X-SVN-Rev: 11474
This commit is contained in:
George Rhoten 2003-04-08 23:52:29 +00:00
parent a40e9d4df6
commit b2599603cc
1 changed files with 13 additions and 22 deletions
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35
icu4c/source/common/ucnvisci.c
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@ -1459,31 +1459,22 @@ _ISCIIGetUnicodeSet(const UConverter *cnv,
UConverterUnicodeSet which,
UErrorCode *pErrorCode)
{
int32_t idx;
int32_t fromUnicodeDelta;
uint8_t offset;
static const uint8_t versionToScriptOffset[MALAYALAM+1] = {
/* 0, 1, 2, 3, 4, 5, 6, 7, 8 */
0, 4, 1, 2, 3, 7, 5, 5, 6
};
if (cnv->options > MALAYALAM) {
/* sanity check */
*pErrorCode = U_UNSUPPORTED_ERROR;
return;
}
offset = versionToScriptOffset[cnv->options];
fromUnicodeDelta = ((UConverterDataISCII*)(cnv->extraInfo))->currentDeltaFromUnicode;
int32_t idx, script;
uint8_t mask;
for (idx = 0; idx < DELTA; idx++) {
if ((validityTable[idx] << offset) & DELTA) {
uset_add(set, idx + fromUnicodeDelta + INDIC_BLOCK_BEGIN);
/* Since all ISCII versions allow switching to other ISCII
scripts, we add all roundtrippable characters to this set. */
uset_addRange(set, 0, ASCII_END);
for (script = DEVANAGARI; script <= MALAYALAM; script++) {
mask = (uint8_t)(lookupInitialData[script][1]);
for (idx = 0; idx < DELTA; idx++) {
if (validityTable[idx] & mask) {
uset_add(set, idx + (script * DELTA) + INDIC_BLOCK_BEGIN);
}
}
}
if (cnv->options <= ORIYA) {
uset_add(set, DANDA);
uset_add(set, DOUBLE_DANDA);
}
uset_addRange(set, 0, ASCII_END);
uset_add(set, DANDA);
uset_add(set, DOUBLE_DANDA);
uset_add(set, ZWNJ);
uset_add(set, ZWJ);
}