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QR-Code-generator
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Simplified another pair of bit width checks using the right shift operator.

This commit is contained in:
Nayuki Minase 2016-04-12 19:11:07 +00:00
parent 53454449c4
commit 7f01bbf4f3
3 changed files with 6 additions and 6 deletions
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4
QrCode.java
View File

@ -375,7 +375,7 @@ public final class QrCode {
rem = (rem << 1) ^ ((rem >>> 9) * 0x537);
data = data << 10 | rem;
data ^= 0x5412; // uint15
if ((data & ((1 << 15) - 1)) != data)
if (data >>> 15 != 0)
throw new AssertionError();
// Draw first copy
@ -407,7 +407,7 @@ public final class QrCode {
for (int i = 0; i < 12; i++)
rem = (rem << 1) ^ ((rem >>> 11) * 0x1F25);
int data = version << 12 | rem; // uint18
if ((data & ((1 << 18) - 1)) != data)
if (data >>> 18 != 0)
throw new AssertionError();
// Draw two copies

4
qrcodegen.js
View File

@ -354,7 +354,7 @@ var qrcodegen = new function() {
rem = (rem << 1) ^ ((rem >>> 9) * 0x537);
data = data << 10 | rem;
data ^= 0x5412; // uint15
if ((data & ((1 << 15) - 1)) != data)
if (data >>> 15 != 0)
throw "Assertion error";
// Draw first copy
@ -386,7 +386,7 @@ var qrcodegen = new function() {
for (var i = 0; i < 12; i++)
rem = (rem << 1) ^ ((rem >>> 11) * 0x1F25);
var data = version << 12 | rem; // uint18
if ((data & ((1 << 18) - 1)) != data)
if (data >>> 18 != 0)
throw "Assertion error";
// Draw two copies

4
qrcodegen.py
View File

@ -294,7 +294,7 @@ class QrCode(object):
rem = (rem << 1) ^ ((rem >> 9) * 0x537)
data = data << 10 | rem
data ^= 0x5412 # uint15
assert data & ((1 << 15) - 1) == data
assert data >> 15 == 0
# Draw first copy
for i in range(0, 6):
@ -324,7 +324,7 @@ class QrCode(object):
for _ in range(12):
rem = (rem << 1) ^ ((rem >> 11) * 0x1F25)
data = self._version << 12 | rem # uint18
assert data & ((1 << 18) - 1) == data
assert data >> 18 == 0
# Draw two copies
for i in range(18):