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update OP_CAT implementation

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Armin Sabouri 2024-03-20 18:33:02 -04:00
parent 2b5ab3b1fd
commit b3493746b1
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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=== ===Implementation===
<pre> <pre>
case OP_CAT: case OP_CAT: {
{ if (stack.size() < 2)
if (stack.size() < 2) { return set_error(serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
return set_error(serror, SCRIPT_ERR_INVALID_STACK_OPERATION); valtype& vch1 = stacktop(-2);
} valtype& vch2 = stacktop(-1);
valtype& vch1 = stacktop(-2); if (vch1.size() + vch2.size() > MAX_SCRIPT_ELEMENT_SIZE)
valtype& vch2 = stacktop(-1); return set_error(serror, SCRIPT_ERR_PUSH_SIZE);
if (vch1.size() + vch2.size() > MAX_SCRIPT_ELEMENT_SIZE) { vch1.insert(vch1.end(), vch2.begin(), vch2.end());
return set_error(serror, SCRIPT_ERR_INVALID_STACK_OPERATION); stack.pop_back();
}
vch1.insert(vch1.end(), vch2.begin(), vch2.end());
stack.pop_back();
} }
break; break;
</pre> </pre>