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ICU-5514 prevent extension table toUnicode section overflow

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X-SVN-Rev: 20679
This commit is contained in:
Markus Scherer 2006-11-25 00:27:12 +00:00
parent dc327679cf
commit f01e04d593
1 changed files with 8 additions and 1 deletions
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9
icu4c/source/tools/makeconv/gencnvex.c
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@ -439,17 +439,24 @@ generateToUTable(CnvExtData *extData, UCMTable *table,
/* step 2: allocate the section; set count, section */
count=(high-low)+1;
if(unitIndex==0 || uniqueCount>=(3*count)/4) {
if(count<0x100 && (unitIndex==0 || uniqueCount>=(3*count)/4)) {
/*
* for the root table and for fairly full tables:
* allocate for direct, linear array access
* by keeping count, to write an entry for each unit value
* from low to high
* exception: use a compact table if count==0x100 because
* that cannot be encoded in the length byte
*/
} else {
count=uniqueCount;
}
if(count>=0x100) {
fprintf(stderr, "error: toUnicode extension table section overflow: %ld section entries\n", (long)count);
return FALSE;
}
/* allocate the section: 1 entry for the header + count for the items */
section=(uint32_t *)utm_allocN(extData->toUTable, 1+count);