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Add a startLocationInProgram field to ScriptChunk.

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This commit is contained in:
Matt Corallo 2012-08-01 20:35:50 +02:00 committed by Mike Hearn
parent 6a36dcd0ca
commit d7dc953da8
1 changed files with 9 additions and 6 deletions
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15
core/src/main/java/com/google/bitcoin/core/Script.java
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@ -30,9 +30,11 @@ import static com.google.bitcoin.core.Utils.bytesToHexString;
class ScriptChunk {
public boolean isOpCode;
public byte[] data;
public ScriptChunk(boolean isOpCode, byte[] data) {
public int startLocationInProgram;
public ScriptChunk(boolean isOpCode, byte[] data, int startLocationInProgram) {
this.isOpCode = isOpCode;
this.data = data;
this.startLocationInProgram = startLocationInProgram;
}
public boolean equalsOpCode(int opCode) {
return isOpCode &&
@ -513,24 +515,25 @@ public class Script {
chunks = new ArrayList<ScriptChunk>(10); // Arbitrary choice of initial size.
cursor = offset;
while (cursor < offset + length) {
int startLocationInProgram = cursor - offset;
int opcode = readByte();
if (opcode >= 0 && opcode < OP_PUSHDATA1) {
// Read some bytes of data, where how many is the opcode value itself.
chunks.add(new ScriptChunk(false, getData(opcode))); // opcode == len here.
chunks.add(new ScriptChunk(false, getData(opcode), startLocationInProgram)); // opcode == len here.
} else if (opcode == OP_PUSHDATA1) {
int len = readByte();
chunks.add(new ScriptChunk(false, getData(len)));
chunks.add(new ScriptChunk(false, getData(len), startLocationInProgram));
} else if (opcode == OP_PUSHDATA2) {
// Read a short, then read that many bytes of data.
int len = readByte() | (readByte() << 8);
chunks.add(new ScriptChunk(false, getData(len)));
chunks.add(new ScriptChunk(false, getData(len), startLocationInProgram));
} else if (opcode == OP_PUSHDATA4) {
// Read a uint32, then read that many bytes of data.
// Though this is allowed, because its value cannot be > 520, it should never actually be used
long len = readByte() | (readByte() << 8) | (readByte() << 16) | (readByte() << 24);
chunks.add(new ScriptChunk(false, getData((int)len)));
chunks.add(new ScriptChunk(false, getData((int)len), startLocationInProgram));
} else {
chunks.add(new ScriptChunk(true, new byte[]{(byte) opcode}));
chunks.add(new ScriptChunk(true, new byte[]{(byte) opcode}, startLocationInProgram));
}
}
}