Allow addition operator (+) to concatenate strings.
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parent
3a994221ce
commit
9a56751879
42
engine/vm.c
42
engine/vm.c
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@ -3406,9 +3406,29 @@ static sxi32 VmByteCodeExec(
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goto Abort;
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}
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#endif
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/* Perform the addition */
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if(pNos->iFlags & MEMOBJ_STRING || pTos->iFlags & MEMOBJ_STRING) {
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/* Perform the string addition */
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ph7_value *pCur;
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if((pNos->iFlags & MEMOBJ_STRING) == 0) {
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PH7_MemObjToString(pNos);
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}
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pCur = &pNos[1];
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while(pCur <= pTos) {
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if((pCur->iFlags & MEMOBJ_STRING) == 0) {
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PH7_MemObjToString(pCur);
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}
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if(SyBlobLength(&pCur->sBlob) > 0) {
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PH7_MemObjStringAppend(pNos, (const char *)SyBlobData(&pCur->sBlob), SyBlobLength(&pCur->sBlob));
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}
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SyBlobRelease(&pCur->sBlob);
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pCur++;
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}
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pTos = pNos;
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} else {
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/* Perform the number addition */
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PH7_MemObjAdd(pNos, pTos, FALSE);
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VmPopOperand(&pTos, 1);
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}
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break;
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}
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/*
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@ -3420,19 +3440,29 @@ static sxi32 VmByteCodeExec(
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case PH7_OP_ADD_STORE: {
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ph7_value *pNos = &pTos[-1];
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ph7_value *pObj;
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sxu32 nIdx;
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#ifdef UNTRUST
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if(pNos < pStack) {
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goto Abort;
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}
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#endif
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/* Perform the addition */
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nIdx = pTos->nIdx;
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if(pTos->iFlags & MEMOBJ_STRING) {
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/* Perform the string addition */
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if((pNos->iFlags & MEMOBJ_STRING) == 0) {
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/* Force a string cast */
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PH7_MemObjToString(pNos);
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}
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/* Perform the concatenation (Reverse order) */
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if(SyBlobLength(&pNos->sBlob) > 0) {
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PH7_MemObjStringAppend(pTos, (const char *)SyBlobData(&pNos->sBlob), SyBlobLength(&pNos->sBlob));
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}
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} else {
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/* Perform the number addition */
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PH7_MemObjAdd(pTos, pNos, TRUE);
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}
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/* Perform the store operation */
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if(nIdx == SXU32_HIGH) {
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if(pTos->nIdx == SXU32_HIGH) {
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PH7_VmThrowError(&(*pVm), 0, PH7_CTX_ERR, "Cannot perform assignment on a constant class attribute");
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} else if((pObj = (ph7_value *)SySetAt(&pVm->aMemObj, nIdx)) != 0) {
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} else if((pObj = (ph7_value *)SySetAt(&pVm->aMemObj, pTos->nIdx)) != 0) {
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PH7_MemObjStore(pTos, pObj);
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}
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/* Ticket 1433-35: Perform a stack dup */
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