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minor optimizations in ByteArrayInput

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git-svn-id: https://smali.googlecode.com/svn/trunk@686 55b6fa8a-2a1e-11de-a435-ffa8d773f76a
This commit is contained in:
JesusFreke@JesusFreke.com 2010-04-03 23:02:08 +00:00
parent 1f29ee7351
commit bba8645009
1 changed files with 23 additions and 61 deletions
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84
dexlib/src/main/java/org/jf/dexlib/Util/ByteArrayInput.java
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@ -78,66 +78,43 @@ public class ByteArrayInput
/** {@inheritDoc} */
public byte readByte() {
int readAt = cursor;
int end = readAt + 1;
if (end > data.length) {
throwBounds();
}
cursor = end;
return data[readAt];
return data[cursor++];
}
/** {@inheritDoc} */
public int readShort() {
int readAt = cursor;
int end = readAt + 2;
if (end > data.length) {
throwBounds();
}
cursor = end;
return ((data[readAt] & 0xff) +
((data[readAt + 1] & 0xff) << 8));
int result = ((data[readAt++] & 0xff) +
((data[readAt++] & 0xff) << 8));
cursor = readAt;
return result;
}
/** {@inheritDoc} */
public int readInt() {
int readAt = cursor;
int end = readAt + 4;
if (end > data.length) {
throwBounds();
}
cursor = end;
return (data[readAt] & 0xff) +
((data[readAt + 1] & 0xff) << 8) +
((data[readAt + 2] & 0xff) << 16) +
((data[readAt + 3] & 0xff) << 24);
int result = (data[readAt++] & 0xff) +
((data[readAt++] & 0xff) << 8) +
((data[readAt++] & 0xff) << 16) +
((data[readAt++] & 0xff) << 24);
cursor = readAt;
return result;
}
/** {@inheritDoc} */
public long readLong() {
int readAt = cursor;
int end = readAt + 8;
if (end > data.length) {
throwBounds();
}
cursor = end;
return (data[readAt] & 0xffL) |
((data[readAt + 1] & 0xffL) << 8) |
((data[readAt + 2] & 0xffL) << 16) |
((data[readAt + 3] & 0xffL) << 24) |
((data[readAt + 4] & 0xffL) << 32) |
((data[readAt + 5] & 0xffL) << 40) |
((data[readAt + 6] & 0xffL) << 48) |
((data[readAt + 7] & 0xffL) << 58);
long result = (data[readAt++] & 0xffL) |
((data[readAt++] & 0xffL) << 8) |
((data[readAt++] & 0xffL) << 16) |
((data[readAt++] & 0xffL) << 24) |
((data[readAt++] & 0xffL) << 32) |
((data[readAt++] & 0xffL) << 40) |
((data[readAt++] & 0xffL) << 48) |
((data[readAt++] & 0xffL) << 58);
cursor = readAt;
return result;
}
@ -300,9 +277,6 @@ public class ByteArrayInput
int startPosition = cursor;
while (data[cursor] != 0) {
cursor++;
if (cursor >= data.length) {
throwBounds();
}
}
int byteCount = cursor - startPosition;
@ -314,24 +288,12 @@ public class ByteArrayInput
/** {@inheritDoc} */
public void skipBytes(int count) {
int end = cursor + count;
if (end > data.length) {
throwBounds();
}
cursor = end;
cursor += count;
}
/** {@inheritDoc} */
public void alignTo(int alignment) {
int end = AlignmentUtils.alignOffset(cursor, alignment);
if (end > data.length) {
throwBounds();
}
cursor = end;
cursor = AlignmentUtils.alignOffset(cursor, alignment);
}
/**