C++ StringData::incRefCount方法代码示例

/**
 * concat_si will decRef the string passed in as appropriate, and it will
 * incRef the output string
 */
StringData*
concat_si(StringData* v1, int64 v2) {
  int len2;
  char intbuf[21];
  char* intstart;
  // Convert the int to a string
  {
    int is_negative;
    intstart = conv_10(v2, &is_negative, intbuf + sizeof(intbuf), &len2);
  }
  StringSlice s1 = v1->slice();
  StringSlice s2(intstart, len2);
  StringData* ret = NEW(StringData)(s1, s2);
  ret->incRefCount();
  decRefStr(v1);
  return ret;
}

int hphp_ffi_exportVariant(CVarRef v, void** result) {
  switch (v.getType()) {
  case KindOfNull:    return 0;
  case KindOfBoolean: *result = (void*)v.toBoolean(); return 1;
  case KindOfByte:
  case KindOfInt16:
  case KindOfInt32:
  case KindOfInt64: {
    *result = (void*)v.toInt64();
    return 2;
  }
  case KindOfDouble: {
    union {
      double d;
      void* p;
    } u;
    u.d = v.toDouble();
    *result = u.p;
    return 3;
  }
  case LiteralString: *result = (void*)v.getLiteralString(); return 4;
  case KindOfString: {
    StringData *sd = v.getStringData();
    sd->incRefCount();
    *result = (void*)sd;
    return 5;
  }
  case KindOfArray: {
    ArrayData *ad = v.getArrayData();
    ad->incRefCount();
    *result = (void*)ad;
    return 6;
  }
  case KindOfObject: {
    ObjectData *od = v.getObjectData();
    od->incRefCount();
    *result = (void*)od;
    return 7;
  }
  default:
    ASSERT(false);
    return 0;
  }
}

/**
 * concat will decRef the values passed in as appropriate, and it will
 * incRef the output string
 */
StringData*
concat_tv(DataType t1, uint64_t v1, DataType t2, uint64_t v2) {
  const char *s1, *s2;
  size_t s1len, s2len;
  bool free1, free2;
  tvPairToCString(t1, v1, &s1, &s1len, &free1);
  tvPairToCString(t2, v2, &s2, &s2len, &free2);
  StringSlice r1(s1, s1len);
  StringSlice r2(s2, s2len);
  StringData* retval = StringData::Make(r1, r2);
  retval->incRefCount();
  // If tvPairToCString allocated temporary buffers, free them now
  if (free1) free((void*)s1);
  if (free2) free((void*)s2);
  // decRef the parameters as appropriate
  tvRefcountedDecRefHelper(t2, v2);
  tvRefcountedDecRefHelper(t1, v1);

  return retval;
}

/*
 * Wraps calling an (autoload) PHP function from a CufIter.
 */
static Variant vm_call_user_func_cufiter(const CufIter& cufIter,
                                         const Array& params) {
  ObjectData* obj = nullptr;
  HPHP::Class* cls = nullptr;
  StringData* invName = cufIter.name();
  const HPHP::Func* f = cufIter.func();
  if (cufIter.ctx()) {
    if (uintptr_t(cufIter.ctx()) & 1) {
      cls = (Class*)(uintptr_t(cufIter.ctx()) & ~1);
    } else {
      obj = (ObjectData*)cufIter.ctx();
    }
  }
  assert(!obj || !cls);
  if (invName) {
    invName->incRefCount();
  }
  Variant ret;
  g_context->invokeFunc((TypedValue*)&ret, f, params, obj, cls,
                          nullptr, invName, ExecutionContext::InvokeCuf);
  return ret;
}

void tvCastToStringInPlace(TypedValue* tv) {
  assert(tvIsPlausible(*tv));
  tvUnboxIfNeeded(tv);
  StringData * s;
  switch (tv->m_type) {
  case KindOfUninit:
  case KindOfNull:    s = empty_string.get(); goto static_string;
  case KindOfBoolean:
    s = tv->m_data.num ? s_1.get() : empty_string.get();
    goto static_string;
  case KindOfInt64:   s = buildStringData(tv->m_data.num); break;
  case KindOfDouble:  s = buildStringData(tv->m_data.dbl); break;
  case KindOfStaticString:
  case KindOfString:  return;
  case KindOfArray:
    raise_notice("Array to string conversion");
    s = s_Array.get();
    tvDecRefArr(tv);
    goto static_string;
  case KindOfObject:
    // For objects, we fall back on the Variant machinery
    tvAsVariant(tv) = tv->m_data.pobj->invokeToString();
    return;
  case KindOfResource:
    // For resources, we fall back on the Variant machinery
    tvAsVariant(tv) = tv->m_data.pres->o_toString();
    return;
  default:
    not_reached();
  }

  s->incRefCount();
  tv->m_data.pstr = s;
  tv->m_type = KindOfString;
  return;
static_string:
  tv->m_data.pstr = s;
  tv->m_type = KindOfStaticString;
}

StringData* tvCastToString(TypedValue* tv) {
  if (tv->m_type == KindOfRef) {
    tv = tv->m_data.pref->tv();
  }

  StringData* s;
  switch (tv->m_type) {
  case KindOfUninit:
  case KindOfNull:    return empty_string.get();
  case KindOfBoolean: return tv->m_data.num ? s_1.get() : empty_string.get();
  case KindOfInt64:   s = buildStringData(tv->m_data.num); break;
  case KindOfDouble:  s = buildStringData(tv->m_data.dbl); break;
  case KindOfStaticString: return tv->m_data.pstr;
  case KindOfString:  s = tv->m_data.pstr; break;
  case KindOfArray:   return s_Array.get();
  case KindOfObject:  return tv->m_data.pobj->t___tostring().detach();
  default:            not_reached();
  }

  s->incRefCount();
  return s;
}