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QR-Code-generator
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Updated Java worker program to close input stream and reduce indentation.

This commit is contained in:
Project Nayuki 2017-11-23 06:27:20 +00:00
parent 9628e25971
commit 0f73afa367
1 changed files with 59 additions and 55 deletions
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114
java/io/nayuki/qrcodegen/QrCodeGeneratorWorker.java
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@ -38,62 +38,66 @@ public final class QrCodeGeneratorWorker {
public static void main(String[] args) { public static void main(String[] args) {
// Set up input stream and start loop // Set up input stream and start loop
Scanner input = new Scanner(System.in, "US-ASCII"); try (Scanner input = new Scanner(System.in, "US-ASCII")) {
input.useDelimiter("\r\n|\n|\r"); input.useDelimiter("\r\n|\n|\r");
while (true) { while (processCase(input));
// Read data length or exit
int length = input.nextInt();
if (length == -1)
break;
if (length > Short.MAX_VALUE)
throw new RuntimeException();
// Read data bytes
boolean isAscii = true;
byte[] data = new byte[length];
for (int i = 0; i < data.length; i++) {
int b = input.nextInt();
if (b < 0 || b > 255)
throw new RuntimeException();
data[i] = (byte)b;
isAscii &= b < 128;
}
// Read encoding parameters
int errCorLvl = input.nextInt();
int minVersion = input.nextInt();
int maxVersion = input.nextInt();
int mask = input.nextInt();
int boostEcl = input.nextInt();
if (!(0 <= errCorLvl && errCorLvl <= 3) || !(-1 <= mask && mask <= 7) || (boostEcl >>> 1) != 0
|| !(QrCode.MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= QrCode.MAX_VERSION))
throw new RuntimeException();
// Make segments for encoding
List<QrSegment> segs;
if (isAscii)
segs = QrSegment.makeSegments(new String(data, StandardCharsets.US_ASCII));
else
segs = Arrays.asList(QrSegment.makeBytes(data));
try { // Try to make QR Code symbol
QrCode qr = QrCode.encodeSegments(segs, QrCode.Ecc.values()[errCorLvl], minVersion, maxVersion, mask, boostEcl != 0);
// Print grid of modules
System.out.println(qr.version);
for (int y = 0; y < qr.size; y++) {
for (int x = 0; x < qr.size; x++)
System.out.println(qr.getModule(x, y) ? 1 : 0);
}
} catch (IllegalArgumentException e) {
if (!e.getMessage().equals("Data too long"))
throw e;
System.out.println(-1);
}
System.out.flush();
} }
} }
private static boolean processCase(Scanner input) {
// Read data length or exit
int length = input.nextInt();
if (length == -1)
return false;
if (length > Short.MAX_VALUE)
throw new RuntimeException();
// Read data bytes
boolean isAscii = true;
byte[] data = new byte[length];
for (int i = 0; i < data.length; i++) {
int b = input.nextInt();
if (b < 0 || b > 255)
throw new RuntimeException();
data[i] = (byte)b;
isAscii &= b < 128;
}
// Read encoding parameters
int errCorLvl = input.nextInt();
int minVersion = input.nextInt();
int maxVersion = input.nextInt();
int mask = input.nextInt();
int boostEcl = input.nextInt();
if (!(0 <= errCorLvl && errCorLvl <= 3) || !(-1 <= mask && mask <= 7) || (boostEcl >>> 1) != 0
|| !(QrCode.MIN_VERSION <= minVersion && minVersion <= maxVersion && maxVersion <= QrCode.MAX_VERSION))
throw new RuntimeException();
// Make segments for encoding
List<QrSegment> segs;
if (isAscii)
segs = QrSegment.makeSegments(new String(data, StandardCharsets.US_ASCII));
else
segs = Arrays.asList(QrSegment.makeBytes(data));
try { // Try to make QR Code symbol
QrCode qr = QrCode.encodeSegments(segs, QrCode.Ecc.values()[errCorLvl], minVersion, maxVersion, mask, boostEcl != 0);
// Print grid of modules
System.out.println(qr.version);
for (int y = 0; y < qr.size; y++) {
for (int x = 0; x < qr.size; x++)
System.out.println(qr.getModule(x, y) ? 1 : 0);
}
} catch (IllegalArgumentException e) {
if (!e.getMessage().equals("Data too long"))
throw e;
System.out.println(-1);
}
System.out.flush();
return true;
}
} }