Page MenuHomePhabricator
Differential D1093 Diff 2868 src/script/interpreter.cpp

Changeset View

Standalone View

View Options

src/script/interpreter.cpp

Show First 20 Lines • Show All 330 Lines • ▼ Show 20 Lines try {
} }
// Note how OP_RESERVED does not count towards the opcode limit. // Note how OP_RESERVED does not count towards the opcode limit.
if (opcode > OP_16 && ++nOpCount > MAX_OPS_PER_SCRIPT) { if (opcode > OP_16 && ++nOpCount > MAX_OPS_PER_SCRIPT) {
return set_error(serror, SCRIPT_ERR_OP_COUNT); return set_error(serror, SCRIPT_ERR_OP_COUNT);
} }
if (opcode == OP_CAT || opcode == OP_SUBSTR || opcode == OP_LEFT || if (opcode == OP_CAT || opcode == OP_SUBSTR || opcode == OP_LEFT ||
opcode == OP_RIGHT || opcode == OP_INVERT || opcode == OP_2MUL || opcode == OP_RIGHT || opcode == OP_INVERT ||
opcode == OP_2DIV || opcode == OP_MUL || opcode == OP_DIV || opcode == OP_2MUL || opcode == OP_2DIV || opcode == OP_MUL ||
opcode == OP_MOD || opcode == OP_LSHIFT || opcode == OP_RSHIFT) { opcode == OP_MOD || opcode == OP_LSHIFT ||
opcode == OP_RSHIFT) {
// Disabled opcodes. // Disabled opcodes.
return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE); return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
} }
if (fExec && 0 <= opcode && opcode <= OP_PUSHDATA4) { if (fExec && 0 <= opcode && opcode <= OP_PUSHDATA4) {
if (fRequireMinimal && if (fRequireMinimal &&
!CheckMinimalPush(vchPushValue, opcode)) { !CheckMinimalPush(vchPushValue, opcode)) {
return set_error(serror, SCRIPT_ERR_MINIMALDATA); return set_error(serror, SCRIPT_ERR_MINIMALDATA);
▲ Show 20 Lines • Show All 432 Lines • ▼ Show 20 Lines try {
case OP_AND: case OP_AND:
case OP_OR: case OP_OR:
case OP_XOR: { case OP_XOR: {
// (x1 x2 - out) // (x1 x2 - out)
if (stack.size() < 2) { if (stack.size() < 2) {
return set_error( return set_error(
serror, SCRIPT_ERR_INVALID_STACK_OPERATION); serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
} }
valtype& vch1 = stacktop(-2); valtype &vch1 = stacktop(-2);
valtype& vch2 = stacktop(-1); valtype &vch2 = stacktop(-1);
// throw error if inputs are not the same size // throw error if inputs are not the same size
if (vch1.size() != vch2.size()) { if (vch1.size() != vch2.size()) {
return set_error( return set_error(
serror, SCRIPT_ERR_INVALID_BITWISE_OPERATION); serror, SCRIPT_ERR_INVALID_BITWISE_OPERATION);
} }
switch (opcode) { switch (opcode) {
case OP_AND: case OP_AND:
▲ Show 20 Lines • Show All 88 Lines • ▼ Show 20 Lines try {
break; break;
} }
popstack(stack); popstack(stack);
stack.push_back(bn.getvch()); stack.push_back(bn.getvch());
} break; } break;
case OP_ADD: case OP_ADD:
case OP_SUB: case OP_SUB:
case OP_DIV:
case OP_BOOLAND: case OP_BOOLAND:
case OP_BOOLOR: case OP_BOOLOR:
case OP_NUMEQUAL: case OP_NUMEQUAL:
case OP_NUMEQUALVERIFY: case OP_NUMEQUALVERIFY:
case OP_NUMNOTEQUAL: case OP_NUMNOTEQUAL:
case OP_LESSTHAN: case OP_LESSTHAN:
case OP_GREATERTHAN: case OP_GREATERTHAN:
case OP_LESSTHANOREQUAL: case OP_LESSTHANOREQUAL:
case OP_GREATERTHANOREQUAL: case OP_GREATERTHANOREQUAL:
case OP_MIN: case OP_MIN:
case OP_MAX: { case OP_MAX: {
// (x1 x2 -- out) // (x1 x2 -- out)
if (stack.size() < 2) { if (stack.size() < 2) {
return set_error( return set_error(
serror, SCRIPT_ERR_INVALID_STACK_OPERATION); serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
} }
// first two inputs must be minimally encoded numbers
CScriptNum bn1(stacktop(-2), fRequireMinimal); CScriptNum bn1(stacktop(-2), fRequireMinimal);
CScriptNum bn2(stacktop(-1), fRequireMinimal); CScriptNum bn2(stacktop(-1), fRequireMinimal);
CScriptNum bn(0); CScriptNum bn(0);
switch (opcode) { switch (opcode) {
case OP_ADD: case OP_ADD:
bn = bn1 + bn2; bn = bn1 + bn2;
break; break;
case OP_SUB: case OP_SUB:
bn = bn1 - bn2; bn = bn1 - bn2;
break; break;
case OP_DIV:
// 2nd operand must not be 0
if (bn2 == 0) {
return set_error(serror,
SCRIPT_ERR_DIV_BY_ZERO);
}
bn = bn1 / bn2;
break;
case OP_BOOLAND: case OP_BOOLAND:
bn = (bn1 != bnZero && bn2 != bnZero); bn = (bn1 != bnZero && bn2 != bnZero);
break; break;
case OP_BOOLOR: case OP_BOOLOR:
bn = (bn1 != bnZero || bn2 != bnZero); bn = (bn1 != bnZero || bn2 != bnZero);
break; break;
case OP_NUMEQUAL: case OP_NUMEQUAL:
bn = (bn1 == bn2); bn = (bn1 == bn2);
▲ Show 20 Lines • Show All 730 Lines • Show Last 20 Lines