bool CmapCoverage::getCoverage(SparseBitSet& coverage, const uint8_t* cmap_data, size_t cmap_size) {
 vector<uint32_t> coverageVec;
 const size_t kHeaderSize = 4;
 const size_t kNumTablesOffset = 2;
 const size_t kTableSize = 8;
 const size_t kPlatformIdOffset = 0;
 const size_t kEncodingIdOffset = 2;
 const size_t kOffsetOffset = 4;
 const int kMicrosoftPlatformId = 3;
 const int kUnicodeBmpEncodingId = 1;
 const int kUnicodeUcs4EncodingId = 10;
 if (kHeaderSize > cmap_size) {
 return false;
 }
 int numTables = readU16(cmap_data, kNumTablesOffset);
 if (kHeaderSize + numTables * kTableSize > cmap_size) {
 return false;
 }
 int bestTable = -1;
 for (int i = 0; i < numTables; i++) {
 uint16_t platformId = readU16(cmap_data, kHeaderSize + i * kTableSize + kPlatformIdOffset);
 uint16_t encodingId = readU16(cmap_data, kHeaderSize + i * kTableSize + kEncodingIdOffset);
 if (platformId == kMicrosoftPlatformId && encodingId == kUnicodeUcs4EncodingId) {
            bestTable = i;
 break;
 } else if (platformId == kMicrosoftPlatformId && encodingId == kUnicodeBmpEncodingId) {
            bestTable = i;
 }
 }
#ifdef VERBOSE_DEBUG
    ALOGD("best table = %d\n", bestTable);
#endif
 if (bestTable < 0) {
 return false;
 }
 uint32_t offset = readU32(cmap_data, kHeaderSize + bestTable * kTableSize + kOffsetOffset);
 if (offset + 2 > cmap_size) {
 return false;
 }
 uint16_t format = readU16(cmap_data, offset);
 bool success = false;
 const uint8_t* tableData = cmap_data + offset;
 const size_t tableSize = cmap_size - offset;
 if (format == 4) {
        success = getCoverageFormat4(coverageVec, tableData, tableSize);
 } else if (format == 12) {
        success = getCoverageFormat12(coverageVec, tableData, tableSize);
 }
 if (success) {
        coverage.initFromRanges(&coverageVec.front(), coverageVec.size() >> 1);
 }
#ifdef VERBOSE_DEBUG
 for (size_t i = 0; i < coverageVec.size(); i += 2) {
        ALOGD("%x:%x\n", coverageVec[i], coverageVec[i + 1]);
 }
    ALOGD("success = %d", success);
#endif
 return success;
}

Historically, this outdated classification described vulnerabilities from improper handling of data inputs, leading to unexpected program behavior or errors when input validation fails.