import com.google.zxing.common.ByteArray;
import com.google.zxing.common.reedsolomon.GF256;
import com.google.zxing.common.reedsolomon.ReedSolomonEncoder;
+import com.google.zxing.WriterException;
+import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import java.util.Vector;
public final class Encoder {
// The original table is defined in the table 5 of JISX0510:2004 (p.19).
- private static final int kAlphanumericTable[] = {
+ private static final int[] ALPHANUMERIC_TABLE = {
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 0x00-0x0f
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, // 0x10-0x1f
36, -1, -1, -1, 37, 38, -1, -1, -1, -1, 39, 40, -1, 41, 42, 43, // 0x20-0x2f
private static final class RSBlockInfo {
- int num_bytes;
- int block_info[][];
+ final int numBytes;
+ final int[][] blockInfo;
- public RSBlockInfo(int num_bytes, int[][] block_info) {
- this.num_bytes = num_bytes;
- this.block_info = block_info;
+ public RSBlockInfo(int numBytes, int[][] blockInfo) {
+ this.numBytes = numBytes;
+ this.blockInfo = blockInfo;
}
}
- // The table is from table 12 of JISX0510:2004 (p. 30). The "block_info" parts are ordered by
- // L, M, Q, H. Within each block_info, the 0th element is num_ec_bytes, and the 1st element is
- // num_rs_blocks. The table was doublechecked by komatsu.
- private static final RSBlockInfo kRSBlockTable[] = {
+ // The table is from table 12 of JISX0510:2004 (p. 30). The "blockInfo" parts are ordered by
+ // L, M, Q, H. Within each blockInfo, the 0th element is getNumECBytes, and the 1st element is
+ // getNumRSBlocks. The table was doublechecked by komatsu.
+ private static final RSBlockInfo[] RS_BLOCK_TABLE = {
new RSBlockInfo( 26, new int[][]{ { 7, 1}, { 10, 1}, { 13, 1}, { 17, 1}}), // Version 1
new RSBlockInfo( 44, new int[][]{ { 10, 1}, { 16, 1}, { 22, 1}, { 28, 1}}), // Version 2
new RSBlockInfo( 70, new int[][]{ { 15, 1}, { 26, 1}, { 36, 2}, { 44, 2}}), // Version 3
private static final class BlockPair {
- private ByteArray dataBytes;
- private ByteArray errorCorrectionBytes;
+ private final ByteArray dataBytes;
+ private final ByteArray errorCorrectionBytes;
public BlockPair(ByteArray data, ByteArray errorCorrection) {
dataBytes = data;
}
- // Encode "bytes" with the error correction level "ec_level". The encoding mode will be chosen
- // internally by ChooseMode(). On success, store the result in "qr_code" and return true. On
- // error, return false. We recommend you to use QRCode.EC_LEVEL_L (the lowest level) for
- // "ec_level" since our primary use is to show QR code on desktop screens. We don't need very
+ // Encode "bytes" with the error correction level "getECLevel". The encoding mode will be chosen
+ // internally by chooseMode(). On success, store the result in "qrCode" and return true.
+ // We recommend you to use QRCode.EC_LEVEL_L (the lowest level) for
+ // "getECLevel" since our primary use is to show QR code on desktop screens. We don't need very
// strong error correction for this purpose.
//
// Note that there is no way to encode bytes in MODE_KANJI. We might want to add EncodeWithMode()
// with which clients can specify the encoding mode. For now, we don't need the functionality.
- public static boolean Encode(final ByteArray bytes, int ec_level, QRCode qr_code) {
+ public static void encode(final ByteArray bytes, ErrorCorrectionLevel ecLevel, QRCode qrCode)
+ throws WriterException {
// Step 1: Choose the mode (encoding).
- final int mode = ChooseMode(bytes);
+ final int mode = chooseMode(bytes);
- // Step 2: Append "bytes" into "data_bits" in appropriate encoding.
- BitVector data_bits = new BitVector();
- if (!AppendBytes(bytes, mode, data_bits)) {
- return false;
- }
- // Step 3: Initialize QR code that can contain "data_bits".
- final int num_input_bytes = data_bits.num_bytes();
- if (!InitQRCode(num_input_bytes, ec_level, mode, qr_code)) {
- return false;
- }
+ // Step 2: Append "bytes" into "dataBits" in appropriate encoding.
+ BitVector dataBits = new BitVector();
+ appendBytes(bytes, mode, dataBits);
+ // Step 3: Initialize QR code that can contain "dataBits".
+ final int numInputBytes = dataBits.sizeInBytes();
+ initQRCode(numInputBytes, ecLevel, mode, qrCode);
// Step 4: Build another bit vector that contains header and data.
- BitVector header_and_data_bits = new BitVector();
- if (!AppendModeInfo(qr_code.mode(), header_and_data_bits)) {
- return false;
- }
- if (!AppendLengthInfo(bytes.size(), qr_code.version(), qr_code.mode(), header_and_data_bits)) {
- return false;
- }
- header_and_data_bits.AppendBitVector(data_bits);
+ BitVector headerAndDataBits = new BitVector();
+ appendModeInfo(qrCode.getMode(), headerAndDataBits);
+ appendLengthInfo(bytes.size(), qrCode.getVersion(), qrCode.getMode(), headerAndDataBits);
+ headerAndDataBits.appendBitVector(dataBits);
// Step 5: Terminate the bits properly.
- if (!TerminateBits(qr_code.num_data_bytes(), header_and_data_bits)) {
- return false;
- }
+ terminateBits(qrCode.getNumDataBytes(), headerAndDataBits);
// Step 6: Interleave data bits with error correction code.
- BitVector final_bits = new BitVector();
- InterleaveWithECBytes(header_and_data_bits, qr_code.num_total_bytes(), qr_code.num_data_bytes(),
- qr_code.num_rs_blocks(), final_bits);
+ BitVector finalBits = new BitVector();
+ interleaveWithECBytes(headerAndDataBits, qrCode.getNumTotalBytes(), qrCode.getNumDataBytes(),
+ qrCode.getNumRSBlocks(), finalBits);
- // Step 7: Choose the mask pattern and set to "qr_code".
- ByteMatrix matrix = new ByteMatrix(qr_code.matrix_width(), qr_code.matrix_width());
- qr_code.set_mask_pattern(ChooseMaskPattern(final_bits, qr_code.ec_level(), qr_code.version(),
+ // Step 7: Choose the mask pattern and set to "qrCode".
+ ByteMatrix matrix = new ByteMatrix(qrCode.getMatrixWidth(), qrCode.getMatrixWidth());
+ qrCode.setMaskPattern(chooseMaskPattern(finalBits, qrCode.getECLevel(), qrCode.getVersion(),
matrix));
- if (qr_code.mask_pattern() == -1) {
- // There was an error.
- return false;
- }
- // Step 8. Build the matrix and set it to "qr_code".
- MatrixUtil.BuildMatrix(final_bits, qr_code.ec_level(), qr_code.version(),
- qr_code.mask_pattern(), matrix);
- qr_code.set_matrix(matrix);
+ // Step 8. Build the matrix and set it to "qrCode".
+ MatrixUtil.buildMatrix(finalBits, qrCode.getECLevel(), qrCode.getVersion(),
+ qrCode.getMaskPattern(), matrix);
+ qrCode.setMatrix(matrix);
// Step 9. Make sure we have a valid QR Code.
- if (!qr_code.IsValid()) {
- Debug.LOG_ERROR("Invalid QR code: " + qr_code.toString());
- return false;
+ if (!qrCode.isValid()) {
+ throw new WriterException("Invalid QR code: " + qrCode.toString());
}
- return true;
}
// Return the code point of the table used in alphanumeric mode. Return -1 if there is no
// corresponding code in the table.
- static int GetAlphanumericCode(int code) {
- if (code < kAlphanumericTable.length) {
- return kAlphanumericTable[code];
+ static int getAlphanumericCode(int code) {
+ if (code < ALPHANUMERIC_TABLE.length) {
+ return ALPHANUMERIC_TABLE[code];
}
return -1;
}
// interpreted as one character in Shift_JIS, but also two characters in ISO-8859-1.
//
// JAVAPORT: This MODE_KANJI limitation sounds like a problem for us.
- public static int ChooseMode(final ByteArray bytes) {
- boolean has_numeric = false;
- boolean has_alphanumeric = false;
- boolean has_other = false;
+ public static int chooseMode(final ByteArray bytes) throws WriterException {
+ boolean hasNumeric = false;
+ boolean hasAlphanumeric = false;
+ boolean hasOther = false;
for (int i = 0; i < bytes.size(); ++i) {
final int oneByte = bytes.at(i);
if (oneByte >= '0' && oneByte <= '9') {
- has_numeric = true;
- } else if (GetAlphanumericCode(oneByte) != -1) {
- has_alphanumeric = true;
+ hasNumeric = true;
+ } else if (getAlphanumericCode(oneByte) != -1) {
+ hasAlphanumeric = true;
} else {
- has_other = true;
+ hasOther = true;
}
}
- if (has_other) {
+ if (hasOther) {
return QRCode.MODE_8BIT_BYTE;
- } else if (has_alphanumeric) {
+ } else if (hasAlphanumeric) {
return QRCode.MODE_ALPHANUMERIC;
- } else if (has_numeric) {
+ } else if (hasNumeric) {
return QRCode.MODE_NUMERIC;
}
// "bytes" must be empty to reach here.
- Debug.DCHECK(bytes.empty());
+ if (!bytes.empty()) {
+ throw new WriterException("Bytes left over");
+ }
return QRCode.MODE_8BIT_BYTE;
}
- private static int ChooseMaskPattern(final BitVector bits, int ec_level, int version,
- ByteMatrix matrix) {
- if (!QRCode.IsValidMatrixWidth(matrix.width())) {
- Debug.LOG_ERROR("Invalid matrix width: " + matrix.width());
- return -1;
+ private static int chooseMaskPattern(final BitVector bits, ErrorCorrectionLevel ecLevel, int version,
+ ByteMatrix matrix) throws WriterException {
+ if (!QRCode.isValidMatrixWidth(matrix.width())) {
+ throw new WriterException("Invalid matrix width: " + matrix.width());
}
- int min_penalty = Integer.MAX_VALUE; // Lower penalty is better.
- int best_mask_pattern = -1;
+ int minPenalty = Integer.MAX_VALUE; // Lower penalty is better.
+ int bestMaskPattern = -1;
// We try all mask patterns to choose the best one.
- for (int i = 0; i < QRCode.kNumMaskPatterns; ++i) {
- final int mask_pattern = i;
- if (!MatrixUtil.BuildMatrix(bits, ec_level, version,
- mask_pattern, matrix)) {
- return -1;
- }
- final int penalty = MaskUtil.CalculateMaskPenalty(matrix);
- Debug.LOG_INFO("mask_pattern: " + mask_pattern + ", " + "penalty: " + penalty);
- if (penalty < min_penalty) {
- min_penalty = penalty;
- best_mask_pattern = mask_pattern;
+ for (int maskPattern = 0; maskPattern < QRCode.NUM_MASK_PATTERNS; maskPattern++) {
+ MatrixUtil.buildMatrix(bits, ecLevel, version, maskPattern, matrix);
+ final int penalty = MaskUtil.calculateMaskPenalty(matrix);
+ if (penalty < minPenalty) {
+ minPenalty = penalty;
+ bestMaskPattern = maskPattern;
}
}
- return best_mask_pattern;
+ return bestMaskPattern;
}
- // Initialize "qr_code" according to "num_input_bytes", "ec_level", and "mode". On success, modify
- // "qr_code" and return true. On error, return false.
- private static boolean InitQRCode(int num_input_bytes, int ec_level, int mode, QRCode qr_code) {
- qr_code.set_ec_level(ec_level);
- qr_code.set_mode(mode);
-
- if (!QRCode.IsValidECLevel(ec_level)) {
- Debug.LOG_ERROR("Invalid EC level: " + ec_level);
- return false;
- }
+ // Initialize "qrCode" according to "numInputBytes", "ecLevel", and "mode". On success, modify
+ // "qrCode" and return true.
+ private static void initQRCode(int numInputBytes, ErrorCorrectionLevel ecLevel, int mode, QRCode qrCode)
+ throws WriterException {
+ qrCode.setECLevel(ecLevel);
+ qrCode.setMode(mode);
// In the following comments, we use numbers of Version 7-H.
- for (int i = 0; i < kRSBlockTable.length; ++i) {
- final RSBlockInfo row = kRSBlockTable[i];
- // num_bytes = 196
- final int num_bytes = row.num_bytes;
- // num_ec_bytes = 130
- final int num_ec_bytes = row.block_info[ec_level][0];
- // num_rs_blocks = 5
- final int num_rs_blocks = row.block_info[ec_level][1];
- // num_data_bytes = 196 - 130 = 66
- final int num_data_bytes = num_bytes - num_ec_bytes;
- // We want to choose the smallest version which can contain data of "num_input_bytes" + some
+ for (int i = 0; i < RS_BLOCK_TABLE.length; ++i) {
+ final RSBlockInfo row = RS_BLOCK_TABLE[i];
+ // numBytes = 196
+ final int numBytes = row.numBytes;
+ // getNumECBytes = 130
+ final int numEcBytes = row.blockInfo[ecLevel.ordinal()][0];
+ // getNumRSBlocks = 5
+ final int numRSBlocks = row.blockInfo[ecLevel.ordinal()][1];
+ // getNumDataBytes = 196 - 130 = 66
+ final int numDataBytes = numBytes - numEcBytes;
+ // We want to choose the smallest version which can contain data of "numInputBytes" + some
// extra bits for the header (mode info and length info). The header can be three bytes
// (precisely 4 + 16 bits) at most. Hence we do +3 here.
- if (num_data_bytes >= num_input_bytes + 3) {
+ if (numDataBytes >= numInputBytes + 3) {
// Yay, we found the proper rs block info!
- qr_code.set_version(i + 1);
- qr_code.set_num_total_bytes(num_bytes);
- qr_code.set_num_data_bytes(num_data_bytes);
- qr_code.set_num_rs_blocks(num_rs_blocks);
- // num_ec_bytes = 196 - 66 = 130
- qr_code.set_num_ec_bytes(num_bytes - num_data_bytes);
- // num_matrix_width = 21 + 6 * 4 = 45
- qr_code.set_matrix_width(21 + i * 4);
- return true;
+ qrCode.setVersion(i + 1);
+ qrCode.setNumTotalBytes(numBytes);
+ qrCode.setNumDataBytes(numDataBytes);
+ qrCode.setNumRSBlocks(numRSBlocks);
+ // getNumECBytes = 196 - 66 = 130
+ qrCode.setNumECBytes(numBytes - numDataBytes);
+ // matrix width = 21 + 6 * 4 = 45
+ qrCode.setMatrixWidth(21 + i * 4);
+ return;
}
}
- Debug.LOG_ERROR("Cannot find proper rs block info (input data too big?)");
- return false;
+ throw new WriterException("Cannot find proper rs block info (input data too big?)");
}
// Terminate bits as described in 8.4.8 and 8.4.9 of JISX0510:2004 (p.24).
- static boolean TerminateBits(int num_data_bytes, BitVector bits) {
- final int capacity = num_data_bytes * 8;
+ static void terminateBits(int numDataBytes, BitVector bits) throws WriterException {
+ final int capacity = numDataBytes * 8;
if (bits.size() > capacity) {
- Debug.LOG_ERROR("data bits cannot fit in the QR Code" + bits.size() + " > " + capacity);
- return false;
+ throw new WriterException("data bits cannot fit in the QR Code" + bits.size() + " > " + capacity);
}
// Append termination bits. See 8.4.8 of JISX0510:2004 (p.24) for details.
for (int i = 0; i < 4 && bits.size() < capacity; ++i) {
- bits.AppendBit(0);
+ bits.appendBit(0);
}
- final int num_bits_in_last_byte = bits.size() % 8;
+ final int numBitsInLastByte = bits.size() % 8;
// If the last byte isn't 8-bit aligned, we'll add padding bits.
- if (num_bits_in_last_byte > 0) {
- final int num_padding_bits = 8 - num_bits_in_last_byte;
- for (int i = 0; i < num_padding_bits; ++i) {
- bits.AppendBit(0);
+ if (numBitsInLastByte > 0) {
+ final int numPaddingBits = 8 - numBitsInLastByte;
+ for (int i = 0; i < numPaddingBits; ++i) {
+ bits.appendBit(0);
}
}
// Should be 8-bit aligned here.
- Debug.DCHECK_EQ(0, bits.size() % 8);
+ if (bits.size() % 8 != 0) {
+ throw new WriterException("Number of bits is not a multiple of 8");
+ }
// If we have more space, we'll fill the space with padding patterns defined in 8.4.9 (p.24).
- final int num_padding_bytes = num_data_bytes - bits.num_bytes();
- for (int i = 0; i < num_padding_bytes; ++i) {
+ final int numPaddingBytes = numDataBytes - bits.sizeInBytes();
+ for (int i = 0; i < numPaddingBytes; ++i) {
if (i % 2 == 0) {
- bits.AppendBits(0xec, 8);
+ bits.appendBits(0xec, 8);
} else {
- bits.AppendBits(0x11, 8);
+ bits.appendBits(0x11, 8);
}
}
- Debug.DCHECK_EQ(bits.size(), capacity); // Should be same.
- return bits.size() == capacity;
+ if (bits.size() != capacity) {
+ throw new WriterException("Bits size does not equal capacity");
+ }
}
- // Get number of data bytes and number of error correction bytes for block id "block_id". Store
- // the result in "num_data_bytes_in_block", and "num_ec_bytes_in_block". See table 12 in 8.5.1 of
+ // Get number of data bytes and number of error correction bytes for block id "blockID". Store
+ // the result in "numDataBytesInBlock", and "numECBytesInBlock". See table 12 in 8.5.1 of
// JISX0510:2004 (p.30)
- static void GetNumDataBytesAndNumECBytesForBlockID(int num_total_bytes, int num_data_bytes,
- int num_rs_blocks, int block_id, int[] num_data_bytes_in_block,
- int[] num_ec_bytes_in_block) {
- Debug.DCHECK_LT(block_id, num_rs_blocks);
- // num_rs_blocks_in_group2 = 196 % 5 = 1
- final int num_rs_blocks_in_group2 = num_total_bytes % num_rs_blocks;
- // num_rs_blocks_in_group1 = 5 - 1 = 4
- final int num_rs_blocks_in_group1 = num_rs_blocks - num_rs_blocks_in_group2;
- // num_total_bytes_in_group1 = 196 / 5 = 39
- final int num_total_bytes_in_group1 = num_total_bytes / num_rs_blocks;
- // num_total_bytes_in_group2 = 39 + 1 = 40
- final int num_total_bytes_in_group2 = num_total_bytes_in_group1 + 1;
- // num_data_bytes_in_group1 = 66 / 5 = 13
- final int num_data_bytes_in_group1 = num_data_bytes / num_rs_blocks;
- // num_data_bytes_in_group2 = 13 + 1 = 14
- final int num_data_bytes_in_group2 = num_data_bytes_in_group1 + 1;
- // num_ec_bytes_in_group1 = 39 - 13 = 26
- final int num_ec_bytes_in_group1 = num_total_bytes_in_group1 -
- num_data_bytes_in_group1;
- // num_ec_bytes_in_group2 = 40 - 14 = 26
- final int num_ec_bytes_in_group2 = num_total_bytes_in_group2 -
- num_data_bytes_in_group2;
+ static void getNumDataBytesAndNumECBytesForBlockID(int numTotalBytes, int numDataBytes,
+ int numRSBlocks, int blockID, int[] numDataBytesInBlock,
+ int[] numECBytesInBlock) throws WriterException {
+ if (blockID >= numRSBlocks) {
+ throw new WriterException("Block ID too large");
+ }
+ // numRsBlocksInGroup2 = 196 % 5 = 1
+ final int numRsBlocksInGroup2 = numTotalBytes % numRSBlocks;
+ // numRsBlocksInGroup1 = 5 - 1 = 4
+ final int numRsBlocksInGroup1 = numRSBlocks - numRsBlocksInGroup2;
+ // numTotalBytesInGroup1 = 196 / 5 = 39
+ final int numTotalBytesInGroup1 = numTotalBytes / numRSBlocks;
+ // numTotalBytesInGroup2 = 39 + 1 = 40
+ final int numTotalBytesInGroup2 = numTotalBytesInGroup1 + 1;
+ // numDataBytesInGroup1 = 66 / 5 = 13
+ final int numDataBytesInGroup1 = numDataBytes / numRSBlocks;
+ // numDataBytesInGroup2 = 13 + 1 = 14
+ final int numDataBytesInGroup2 = numDataBytesInGroup1 + 1;
+ // numEcBytesInGroup1 = 39 - 13 = 26
+ final int numEcBytesInGroup1 = numTotalBytesInGroup1 - numDataBytesInGroup1;
+ // numEcBytesInGroup2 = 40 - 14 = 26
+ final int numEcBytesInGroup2 = numTotalBytesInGroup2 - numDataBytesInGroup2;
// Sanity checks.
// 26 = 26
- Debug.DCHECK_EQ(num_ec_bytes_in_group1, num_ec_bytes_in_group2);
+ if (numEcBytesInGroup1 != numEcBytesInGroup2) {
+ throw new WriterException("EC bytes mismatch");
+ }
// 5 = 4 + 1.
- Debug.DCHECK_EQ(num_rs_blocks, num_rs_blocks_in_group1 + num_rs_blocks_in_group2);
+ if (numRSBlocks != numRsBlocksInGroup1 + numRsBlocksInGroup2) {
+ throw new WriterException("RS blocks mismatch");
+ }
// 196 = (13 + 26) * 4 + (14 + 26) * 1
- Debug.DCHECK_EQ(num_total_bytes,
- ((num_data_bytes_in_group1 + num_ec_bytes_in_group1) *
- num_rs_blocks_in_group1) +
- ((num_data_bytes_in_group2 + num_ec_bytes_in_group2) *
- num_rs_blocks_in_group2));
-
- if (block_id < num_rs_blocks_in_group1) {
- num_data_bytes_in_block[0] = num_data_bytes_in_group1;
- num_ec_bytes_in_block[0] = num_ec_bytes_in_group1;
+ if (numTotalBytes !=
+ ((numDataBytesInGroup1 + numEcBytesInGroup1) *
+ numRsBlocksInGroup1) +
+ ((numDataBytesInGroup2 + numEcBytesInGroup2) *
+ numRsBlocksInGroup2)) {
+ throw new WriterException("Total bytes mismatch");
+ }
+
+ if (blockID < numRsBlocksInGroup1) {
+ numDataBytesInBlock[0] = numDataBytesInGroup1;
+ numECBytesInBlock[0] = numEcBytesInGroup1;
} else {
- num_data_bytes_in_block[0] = num_data_bytes_in_group2;
- num_ec_bytes_in_block[0] = num_ec_bytes_in_group2;
+ numDataBytesInBlock[0] = numDataBytesInGroup2;
+ numECBytesInBlock[0] = numEcBytesInGroup2;
}
}
// Interleave "bits" with corresponding error correction bytes. On success, store the result in
- // "result" and return true. On error, return false. The interleave rule is complicated. See 8.6
+ // "result" and return true. The interleave rule is complicated. See 8.6
// of JISX0510:2004 (p.37) for details.
- static boolean InterleaveWithECBytes(final BitVector bits, int num_total_bytes,
- int num_data_bytes, int num_rs_blocks, BitVector result) {
+ static void interleaveWithECBytes(final BitVector bits, int numTotalBytes,
+ int numDataBytes, int numRSBlocks, BitVector result) throws WriterException {
- // "bits" must have "num_data_bytes" bytes of data.
- Debug.DCHECK(bits.num_bytes() == num_data_bytes);
+ // "bits" must have "getNumDataBytes" bytes of data.
+ if (bits.sizeInBytes() != numDataBytes) {
+ throw new WriterException("Number of bits and data bytes does not match");
+ }
// Step 1. Divide data bytes into blocks and generate error correction bytes for them. We'll
// store the divided data bytes blocks and error correction bytes blocks into "blocks".
- int data_bytes_offset = 0;
- int max_num_data_bytes = 0;
- int max_num_ec_bytes = 0;
+ int dataBytesOffset = 0;
+ int maxNumDataBytes = 0;
+ int maxNumEcBytes = 0;
// Since, we know the number of reedsolmon blocks, we can initialize the vector with the number.
- Vector blocks = new Vector(num_rs_blocks);
+ Vector blocks = new Vector(numRSBlocks);
- for (int i = 0; i < num_rs_blocks; ++i) {
- int[] num_data_bytes_in_block = new int[1];
- int[] num_ec_bytes_in_block = new int[1];
- GetNumDataBytesAndNumECBytesForBlockID(
- num_total_bytes, num_data_bytes, num_rs_blocks, i,
- num_data_bytes_in_block, num_ec_bytes_in_block);
+ for (int i = 0; i < numRSBlocks; ++i) {
+ int[] numDataBytesInBlock = new int[1];
+ int[] numEcBytesInBlock = new int[1];
+ getNumDataBytesAndNumECBytesForBlockID(
+ numTotalBytes, numDataBytes, numRSBlocks, i,
+ numDataBytesInBlock, numEcBytesInBlock);
- ByteArray data_bytes = new ByteArray();
- data_bytes.set(bits.getArray(), data_bytes_offset, num_data_bytes_in_block[0]);
- ByteArray ec_bytes = GenerateECBytes(data_bytes, num_ec_bytes_in_block[0]);
- blocks.addElement(new BlockPair(data_bytes, ec_bytes));
+ ByteArray dataBytes = new ByteArray();
+ dataBytes.set(bits.getArray(), dataBytesOffset, numDataBytesInBlock[0]);
+ ByteArray ecBytes = generateECBytes(dataBytes, numEcBytesInBlock[0]);
+ blocks.addElement(new BlockPair(dataBytes, ecBytes));
- max_num_data_bytes = Math.max(max_num_data_bytes, data_bytes.size());
- max_num_ec_bytes = Math.max(max_num_ec_bytes, ec_bytes.size());
- data_bytes_offset += num_data_bytes_in_block[0];
+ maxNumDataBytes = Math.max(maxNumDataBytes, dataBytes.size());
+ maxNumEcBytes = Math.max(maxNumEcBytes, ecBytes.size());
+ dataBytesOffset += numDataBytesInBlock[0];
+ }
+ if (numDataBytes != dataBytesOffset) {
+ throw new WriterException("Data bytes does not match offset");
}
- Debug.DCHECK_EQ(num_data_bytes, data_bytes_offset);
// First, place data blocks.
- for (int i = 0; i < max_num_data_bytes; ++i) {
+ for (int i = 0; i < maxNumDataBytes; ++i) {
for (int j = 0; j < blocks.size(); ++j) {
- final ByteArray data_bytes = ((BlockPair) blocks.elementAt(j)).getDataBytes();
- if (i < data_bytes.size()) {
- result.AppendBits(data_bytes.at(i), 8);
+ final ByteArray dataBytes = ((BlockPair) blocks.elementAt(j)).getDataBytes();
+ if (i < dataBytes.size()) {
+ result.appendBits(dataBytes.at(i), 8);
}
}
}
// Then, place error correction blocks.
- for (int i = 0; i < max_num_ec_bytes; ++i) {
+ for (int i = 0; i < maxNumEcBytes; ++i) {
for (int j = 0; j < blocks.size(); ++j) {
- final ByteArray ec_bytes = ((BlockPair) blocks.elementAt(j)).getErrorCorrectionBytes();
- if (i < ec_bytes.size()) {
- result.AppendBits(ec_bytes.at(i), 8);
+ final ByteArray ecBytes = ((BlockPair) blocks.elementAt(j)).getErrorCorrectionBytes();
+ if (i < ecBytes.size()) {
+ result.appendBits(ecBytes.at(i), 8);
}
}
}
- if (num_total_bytes == result.num_bytes()) { // Should be same.
- return true;
- }
- Debug.LOG_ERROR("Interleaving error: " + num_total_bytes + " and " + result.num_bytes() +
+ if (numTotalBytes != result.sizeInBytes()) { // Should be same.
+ throw new WriterException("Interleaving error: " + numTotalBytes + " and " + result.sizeInBytes() +
" differ.");
- return false;
+ }
}
- static ByteArray GenerateECBytes(ByteArray data_bytes, int num_ec_bytes_in_block) {
- int numDataBytes = data_bytes.size();
- int[] toEncode = new int[numDataBytes + num_ec_bytes_in_block];
+ static ByteArray generateECBytes(ByteArray dataBytes, int numEcBytesInBlock) {
+ int numDataBytes = dataBytes.size();
+ int[] toEncode = new int[numDataBytes + numEcBytesInBlock];
for (int i = 0; i < numDataBytes; i++) {
- toEncode[i] = data_bytes.at(i);
+ toEncode[i] = dataBytes.at(i);
}
- new ReedSolomonEncoder(GF256.QR_CODE_FIELD).encode(toEncode, num_ec_bytes_in_block);
+ new ReedSolomonEncoder(GF256.QR_CODE_FIELD).encode(toEncode, numEcBytesInBlock);
- ByteArray ec_bytes = new ByteArray(num_ec_bytes_in_block);
- for (int i = 0; i < num_ec_bytes_in_block; i++) {
- ec_bytes.set(i, toEncode[numDataBytes + i]);
+ ByteArray ecBytes = new ByteArray(numEcBytesInBlock);
+ for (int i = 0; i < numEcBytesInBlock; i++) {
+ ecBytes.set(i, toEncode[numDataBytes + i]);
}
- return ec_bytes;
+ return ecBytes;
}
// Append mode info. On success, store the result in "bits" and return true. On error, return
// false.
- static boolean AppendModeInfo(int mode, BitVector bits) {
- final int code = QRCode.GetModeCode(mode);
- if (code == -1) {
- Debug.LOG_ERROR("Invalid mode: " + mode);
- return false;
- }
- bits.AppendBits(code, 4);
- return true;
+ static void appendModeInfo(int mode, BitVector bits) throws WriterException {
+ final int code = QRCode.getModeCode(mode);
+ bits.appendBits(code, 4);
}
// Append length info. On success, store the result in "bits" and return true. On error, return
// false.
- static boolean AppendLengthInfo(int num_bytes, int version, int mode, BitVector bits) {
- int num_letters = num_bytes;
+ static void appendLengthInfo(int numBytes, int version, int mode, BitVector bits) throws WriterException {
+ int numLetters = numBytes;
// In Kanji mode, a letter is represented in two bytes.
if (mode == QRCode.MODE_KANJI) {
- Debug.DCHECK_EQ(0, num_letters % 2);
- num_letters /= 2;
+ if (numLetters % 2 != 0) {
+ throw new WriterException("Number of letters must be even");
+ }
+ numLetters /= 2;
}
- final int num_bits = QRCode.GetNumBitsForLength(version, mode);
- if (num_bits == -1) {
- Debug.LOG_ERROR("num_bits unset");
- return false;
- }
- if (num_letters > ((1 << num_bits) - 1)) {
- Debug.LOG_ERROR(num_letters + "is bigger than" + ((1 << num_bits) - 1));
- return false;
+ final int numBits = QRCode.getNumBitsForLength(version, mode);
+ if (numLetters > ((1 << numBits) - 1)) {
+ throw new WriterException(numLetters + "is bigger than" + ((1 << numBits) - 1));
}
- bits.AppendBits(num_letters, num_bits);
- return true;
+ bits.appendBits(numLetters, numBits);
}
// Append "bytes" in "mode" mode (encoding) into "bits". On success, store the result in "bits"
- // and return true. On error, return false.
- static boolean AppendBytes(final ByteArray bytes, int mode, BitVector bits) {
+ // and return true.
+ static void appendBytes(final ByteArray bytes, int mode, BitVector bits) throws WriterException {
switch (mode) {
case QRCode.MODE_NUMERIC:
- return AppendNumericBytes(bytes, bits);
+ appendNumericBytes(bytes, bits);
+ break;
case QRCode.MODE_ALPHANUMERIC:
- return AppendAlphanumericBytes(bytes, bits);
+ appendAlphanumericBytes(bytes, bits);
+ break;
case QRCode.MODE_8BIT_BYTE:
- return Append8BitBytes(bytes, bits);
+ append8BitBytes(bytes, bits);
+ break;
case QRCode.MODE_KANJI:
- return AppendKanjiBytes(bytes, bits);
- default:
+ appendKanjiBytes(bytes, bits);
break;
+ default:
+ throw new WriterException("Invalid mode: " + mode);
}
- Debug.LOG_ERROR("Invalid mode: " + mode);
- return false;
}
// Append "bytes" to "bits" using QRCode.MODE_NUMERIC mode. On success, store the result in "bits"
- // and return true. On error, return false.
- static boolean AppendNumericBytes(final ByteArray bytes, BitVector bits) {
+ // and return true.
+ static void appendNumericBytes(final ByteArray bytes, BitVector bits) throws WriterException {
// Validate all the bytes first.
for (int i = 0; i < bytes.size(); ++i) {
int oneByte = bytes.at(i);
if (oneByte < '0' || oneByte > '9') {
- return false;
+ throw new WriterException("Non-digit found");
}
}
for (int i = 0; i < bytes.size();) {
// Encode three numeric letters in ten bits.
final int num2 = bytes.at(i + 1) - '0';
final int num3 = bytes.at(i + 2) - '0';
- bits.AppendBits(num1 * 100 + num2 * 10 + num3, 10);
+ bits.appendBits(num1 * 100 + num2 * 10 + num3, 10);
i += 3;
} else if (i + 1 < bytes.size()) {
// Encode two numeric letters in seven bits.
final int num2 = bytes.at(i + 1) - '0';
- bits.AppendBits(num1 * 10 + num2, 7);
+ bits.appendBits(num1 * 10 + num2, 7);
i += 2;
} else {
// Encode one numeric letter in four bits.
- bits.AppendBits(num1, 4);
+ bits.appendBits(num1, 4);
++i;
}
}
- return true;
}
// Append "bytes" to "bits" using QRCode.MODE_ALPHANUMERIC mode. On success, store the result in
- // "bits" and return true. On error, return false.
- static boolean AppendAlphanumericBytes(final ByteArray bytes, BitVector bits) {
+ // "bits" and return true.
+ static void appendAlphanumericBytes(final ByteArray bytes, BitVector bits) throws WriterException {
for (int i = 0; i < bytes.size();) {
- final int code1 = GetAlphanumericCode(bytes.at(i));
+ final int code1 = getAlphanumericCode(bytes.at(i));
if (code1 == -1) {
- return false;
+ throw new WriterException();
}
if (i + 1 < bytes.size()) {
- final int code2 = GetAlphanumericCode(bytes.at(i + 1));
+ final int code2 = getAlphanumericCode(bytes.at(i + 1));
if (code2 == -1) {
- return false;
+ throw new WriterException();
}
// Encode two alphanumeric letters in 11 bits.
- bits.AppendBits(code1 * 45 + code2, 11);
+ bits.appendBits(code1 * 45 + code2, 11);
i += 2;
} else {
// Encode one alphanumeric letter in six bits.
- bits.AppendBits(code1, 6);
+ bits.appendBits(code1, 6);
++i;
}
}
- return true;
}
// Append "bytes" to "bits" using QRCode.MODE_8BIT_BYTE mode. On success, store the result in
- // "bits" and return true. On error, return false.
- static boolean Append8BitBytes(final ByteArray bytes, BitVector bits) {
+ // "bits" and return true.
+ static void append8BitBytes(final ByteArray bytes, BitVector bits) {
for (int i = 0; i < bytes.size(); ++i) {
- bits.AppendBits(bytes.at(i), 8);
+ bits.appendBits(bytes.at(i), 8);
}
- return true;
}
// Append "bytes" to "bits" using QRCode.MODE_KANJI mode. On success, store the result in "bits"
- // and return true. On error, return false. See 8.4.5 of JISX0510:2004 (p.21) for how to encode
+ // and return true. See 8.4.5 of JISX0510:2004 (p.21) for how to encode
// Kanji bytes.
- static boolean AppendKanjiBytes(final ByteArray bytes, BitVector bits) {
+ static void appendKanjiBytes(final ByteArray bytes, BitVector bits) throws WriterException {
if (bytes.size() % 2 != 0) {
- // JAVAPORT: Our log implementation throws, which causes the unit test to fail.
- //Debug.LOG_ERROR("Invalid byte sequence: " + bytes);
- return false;
+ throw new WriterException("Number of bytes must be even");
}
for (int i = 0; i < bytes.size(); i += 2) {
- Debug.DCHECK(IsValidKanji(bytes.at(i), bytes.at(i + 1)));
+ if (!isValidKanji(bytes.at(i), bytes.at(i + 1))) {
+ throw new WriterException("Invalid Kanji at " + i);
+ }
final int code = (bytes.at(i) << 8) | bytes.at(i + 1);
int subtracted = -1;
if (code >= 0x8140 && code <= 0x9ffc) {
subtracted = code - 0xc140;
}
if (subtracted == -1) {
- Debug.LOG_ERROR("Invalid byte sequence: " + bytes);
- return false;
+ throw new WriterException("Invalid byte sequence: " + bytes);
}
final int encoded = ((subtracted >> 8) * 0xc0) + (subtracted & 0xff);
- bits.AppendBits(encoded, 13);
+ bits.appendBits(encoded, 13);
}
- return true;
}
// Check if "byte1" and "byte2" can compose a valid Kanji letter (2-byte Shift_JIS letter). The
// numbers are from http://ja.wikipedia.org/wiki/Shift_JIS.
- static boolean IsValidKanji(final int byte1, final int byte2) {
+ static boolean isValidKanji(final int byte1, final int byte2) {
return (byte2 != 0x7f &&
((byte1 >= 0x81 && byte1 <= 0x9f &&
byte2 >= 0x40 && byte2 <= 0xfc) ||
}
// Check if "bytes" is a valid Kanji sequence. Used by the unit tests.
- static boolean IsValidKanjiSequence(final ByteArray bytes) {
+ static boolean isValidKanjiSequence(final ByteArray bytes) {
if (bytes.size() % 2 != 0) {
return false;
}
int i = 0;
for (; i < bytes.size(); i += 2) {
- if (!IsValidKanji(bytes.at(i), bytes.at(i + 1))) {
+ if (!isValidKanji(bytes.at(i), bytes.at(i + 1))) {
break;
}
}
projects / zxing.git / blobdiff