int EAN13Reader::decodeMiddle(Ref<BitArray> row, int startRange[], int startRangeLen,
std::string& resultString) {
const int countersLen = 4;
int counters[countersLen] = { 0, 0, 0, 0 };
int end = row->getSize();
int rowOffset = startRange[1];
int lgPatternFound = 0;
for (int x = 0; x < 6 && rowOffset < end; x++) {
int bestMatch = decodeDigit(row, counters, countersLen, rowOffset,
UPC_EAN_PATTERNS_L_AND_G_PATTERNS);
if (bestMatch < 0) {
return -1;
}
resultString.append(1, (char) ('0' + bestMatch % 10));
for (int i = 0; i < countersLen; i++) {
rowOffset += counters[i];
}
if (bestMatch >= 10) {
lgPatternFound |= 1 << (5 - x);
}
}
if (!determineFirstDigit(resultString, lgPatternFound)) {
return -1;
}
int* middleRange = findGuardPattern(row, rowOffset, true, (int*)getMIDDLE_PATTERN(),
getMIDDLE_PATTERN_LEN());
if (middleRange != NULL) {
rowOffset = middleRange[1];
for (int x = 0; x < 6 && rowOffset < end; x++) {
int bestMatch = decodeDigit(row, counters, countersLen, rowOffset,
UPC_EAN_PATTERNS_L_PATTERNS);
if (bestMatch < 0) {
delete [] middleRange;
return -1;
}
resultString.append(1, (char) ('0' + bestMatch));
for (int i = 0; i < countersLen; i++) {
rowOffset += counters[i];
}
}
delete [] middleRange;
return rowOffset;
}
return -1;
}
int EAN8Reader::decodeMiddle(Ref<BitArray> row, int startGuardBegin, int startGuardEnd,
std::string& resultString){
(void)startGuardBegin;
const int countersLen = 4;
int counters[countersLen] = { 0, 0, 0, 0 };
int end = row->getSize();
int rowOffset = startGuardEnd;
for (int x = 0; x < 4 && rowOffset < end; x++) {
int bestMatch = decodeDigit(row, counters, countersLen, rowOffset,
UPC_EAN_PATTERNS_L_PATTERNS);
if (bestMatch < 0) {
return -1;
}
resultString.append(1, (char) ('0' + bestMatch));
for (int i = 0; i < countersLen; i++) {
rowOffset += counters[i];
}
}
int middleRangeStart;
int middleRangeEnd;
if (findGuardPattern(row, rowOffset, true, (int*)getMIDDLE_PATTERN(),
getMIDDLE_PATTERN_LEN(), &middleRangeStart, &middleRangeEnd)) {
rowOffset = middleRangeEnd;
for (int x = 0; x < 4 && rowOffset < end; x++) {
int bestMatch = decodeDigit(row, counters, countersLen, rowOffset,
UPC_EAN_PATTERNS_L_PATTERNS);
if (bestMatch < 0) {
return -1;
}
resultString.append(1, (char) ('0' + bestMatch));
for (int i = 0; i < countersLen; i++) {
rowOffset += counters[i];
}
}
return rowOffset;
}
return -1;
}
