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Merge pull request #3 from 0xBEEFCAF3/cat

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Update OP_CAT implementation code
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Ethan Heilman 2024-03-20 23:39:53 -04:00 • committed by GitHub
commit 35641a87d7
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1 changed files with 9 additions and 12 deletions
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bip-???-cat.mediawiki
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@ -43,18 +43,15 @@ OP_CAT pops two elements off the stack, concatenates them together in stack orde
===Implementation===
<pre>
case OP_CAT:
{
if (stack.size() < 2) {
return set_error(serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
}
valtype& vch1 = stacktop(-2);
valtype& vch2 = stacktop(-1);
if (vch1.size() + vch2.size() > MAX_SCRIPT_ELEMENT_SIZE) {
return set_error(serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
}
vch1.insert(vch1.end(), vch2.begin(), vch2.end());
stack.pop_back();
case OP_CAT: {
if (stack.size() < 2)
return set_error(serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
valtype& vch1 = stacktop(-2);
valtype& vch2 = stacktop(-1);
if (vch1.size() + vch2.size() > MAX_SCRIPT_ELEMENT_SIZE)
return set_error(serror, SCRIPT_ERR_PUSH_SIZE);
vch1.insert(vch1.end(), vch2.begin(), vch2.end());
stack.pop_back();
}
break;
</pre>