/src/moddable/xs/sources/xsProperty.c

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/*
 * Copyright (c) 2016-2017  Moddable Tech, Inc.
 *
 *   This file is part of the Moddable SDK Runtime.
 * 
 *   The Moddable SDK Runtime is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU Lesser General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 * 
 *   The Moddable SDK Runtime is distributed in the hope that it will be useful,
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *   GNU Lesser General Public License for more details.
 * 
 *   You should have received a copy of the GNU Lesser General Public License
 *   along with the Moddable SDK Runtime.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This file incorporates work covered by the following copyright and  
 * permission notice:  
 *
 *       Copyright (C) 2010-2016 Marvell International Ltd.
 *       Copyright (C) 2002-2010 Kinoma, Inc.
 *
 *       Licensed under the Apache License, Version 2.0 (the "License");
 *       you may not use this file except in compliance with the License.
 *       You may obtain a copy of the License at
 *
 *        http://www.apache.org/licenses/LICENSE-2.0
 *
 *       Unless required by applicable law or agreed to in writing, software
 *       distributed under the License is distributed on an "AS IS" BASIS,
 *       WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 *       See the License for the specific language governing permissions and
 *       limitations under the License.
 */

#include "xsAll.h"

txSlot* fxLastProperty(txMachine* the, txSlot* slot)
{
  txSlot* property;
  while ((property = slot->next))
    slot = property;
  return slot;
}

#ifndef mxLink
txSlot* fxNextHostAccessorProperty(txMachine* the, txSlot* property, txCallback get, txCallback set, txID id, txFlag flag)
{
  txSlot *getter = NULL, *setter = NULL, *home = the->stack, *slot;
  if (get) {
    getter = fxBuildHostFunction(the, get, 0, XS_NO_ID);
    slot = mxFunctionInstanceHome(getter);
    slot->value.home.object = home->value.reference;
    fxRenameFunction(the, getter, id, 0, XS_NO_ID, "get ");
  }
  if (set) {
    setter = fxBuildHostFunction(the, set, 1, XS_NO_ID);
    slot = mxFunctionInstanceHome(setter);
    slot->value.home.object = home->value.reference;
    fxRenameFunction(the, setter, id, 0, XS_NO_ID, "set ");
  }
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = XS_ACCESSOR_KIND;
  property->value.accessor.getter = getter;
  property->value.accessor.setter = setter;
  if (set)
    mxPop();
  if (get)
    mxPop();
  return property;
}

txSlot* fxNextHostFunctionProperty(txMachine* the, txSlot* property, txCallback call, txInteger length, txID id, txFlag flag)
{
  txSlot *function, *home = the->stack, *slot;
  function = fxNewHostFunction(the, call, length, id, XS_NO_ID);
  slot = mxFunctionInstanceHome(function);
  slot->value.home.object = home->value.reference;
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = the->stack->kind;
  property->value = the->stack->value;
  mxPop();
  return property;
}
#endif

txSlot* fxNextUndefinedProperty(txMachine* the, txSlot* property, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = XS_UNDEFINED_KIND;
  return property;
}

txSlot* fxNextNullProperty(txMachine* the, txSlot* property, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = XS_NULL_KIND;
  return property;
}

txSlot* fxNextBooleanProperty(txMachine* the, txSlot* property, txBoolean boolean, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = XS_BOOLEAN_KIND;
  property->value.boolean = boolean;
  return property;
}

txSlot* fxNextIntegerProperty(txMachine* the, txSlot* property, txInteger integer, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = XS_INTEGER_KIND;
  property->value.integer = integer;
  return property;
}

txSlot* fxNextNumberProperty(txMachine* the, txSlot* property, txNumber number, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = XS_NUMBER_KIND;
  property->value.number = number;
  return property;
}

txSlot* fxNextReferenceProperty(txMachine* the, txSlot* property, txSlot* slot, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = XS_REFERENCE_KIND;
  property->value.reference = slot;
  return property;
}

txSlot* fxNextSlotProperty(txMachine* the, txSlot* property, txSlot* slot, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = slot->kind;
  property->value = slot->value;
  return property;
}

txSlot* fxNextStringProperty(txMachine* the, txSlot* property, txString string, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  fxCopyStringC(the, property, string);
  return property;
}

txSlot* fxNextStringXProperty(txMachine* the, txSlot* property, txString string, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
#ifdef mxSnapshot
  fxCopyStringC(the, property, string);
#else
  property->kind = XS_STRING_X_KIND;
  property->value.string = string;
#endif
  return property;
}


txSlot* fxNextSymbolProperty(txMachine* the, txSlot* property, txID symbol, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = XS_SYMBOL_KIND;
  property->value.symbol = symbol;
  return property;
}

txSlot* fxNextTypeDispatchProperty(txMachine* the, txSlot* property, txTypeDispatch* dispatch, txTypeAtomics* atomics, txID id, txFlag flag)
{
  property = property->next = fxNewSlot(the);
  property->flag = flag;
  property->ID = id;
  property->kind = XS_TYPED_ARRAY_KIND;
  property->value.typedArray.dispatch = dispatch;
  property->value.typedArray.atomics = atomics;
  return property;
}

txSlot* fxQueueKey(txMachine* the, txID id, txIndex index, txSlot* keys)
{
  keys = keys->next = fxNewSlot(the);
  keys->kind = XS_AT_KIND;
  keys->value.at.id = id;
  keys->value.at.index = index;
  return keys;
}

txSlot* fxQueueIDKeys(txMachine* the, txSlot* first, txFlag flag, txSlot* keys)
{
  if (flag & XS_EACH_NAME_FLAG) {
    txSlot* property = first;
    while (property) {
      if (!(property->flag & XS_INTERNAL_FLAG) && fxIsKeyName(the, property->ID))
        keys = fxQueueKey(the, property->ID, 0, keys);
      property = property->next;
    }
  }
  if (flag & XS_EACH_SYMBOL_FLAG) {
    txSlot* property = first;
    while (property) {
      if (!(property->flag & XS_INTERNAL_FLAG) && fxIsKeySymbol(the, property->ID))
        keys = fxQueueKey(the, property->ID, 0, keys);
      property = property->next;
    }
  }
  return keys;
}

// INDEX

static txSize fxSizeToCapacity(txMachine* the, txSize size)
{
  return fxAddChunkSizes(the, size, size / 3);
}

txBoolean fxDeleteIndexProperty(txMachine* the, txSlot* array, txIndex index) 
{
  txSlot* address = array->value.array.address;
  if (address) {
    txIndex length = array->value.array.length;
    txIndex size = (((txChunk*)(((txByte*)address) - sizeof(txChunk)))->size) / sizeof(txSlot);
    txSlot* result = address;
    txSlot* limit = result + size;
    if (length == size)
      result = address + index;
    else {
      txIndex at;
      while (result < limit) {
        at = *((txIndex*)result);
        if (at == index)
          break;
        if (at > index)
          return 1;
        result++;
      }
    }
    if (result < limit) {
      if (result->flag & XS_DONT_DELETE_FLAG)
        return 0;
      index = (txIndex)(result - address);
      size--;
      if (size > 0) {
        txSlot* chunk = (txSlot*)fxNewChunk(the, size * sizeof(txSlot));
        address = array->value.array.address;
        if (index > 0)
          c_memcpy(chunk, address, index * sizeof(txSlot));
        if (index < size)
          c_memcpy(chunk + index, address + index + 1, (size - index) * sizeof(txSlot));
        array->value.array.address = chunk;
      }
      else
        array->value.array.address = C_NULL;
    }
  }
  return 1;
}

txSlot* fxGetIndexProperty(txMachine* the, txSlot* array, txIndex index) 
{
  txSlot* address = array->value.array.address;
  if (address) {
    txIndex length = array->value.array.length;
    txIndex size = (((txChunk*)(((txByte*)address) - sizeof(txChunk)))->size) / sizeof(txSlot);
    if (length == size) {
      if (index < length)
        return address + index;
    }
    else {
      txSlot* result = address;
      txSlot* limit = result + size;
      txIndex at;
      while (result < limit) {
        at = *((txIndex*)result);
        if (at == index)
          return result;
        result++;
      }
    }
  }
  return C_NULL;
}

txIndex fxGetIndexSize(txMachine* the, txSlot* array)
{
  txSlot* address = array->value.array.address;
  if (address)
    return (((txChunk*)(((txByte*)address) - sizeof(txChunk)))->size) / sizeof(txSlot);
  return 0;
}

txSlot* fxQueueIndexKeys(txMachine* the, txSlot* array, txFlag flag, txSlot* keys)
{
  if (flag & XS_EACH_NAME_FLAG) {
    if (array->value.array.address) {
      txSize offset = 0;
      txSize size = (((txChunk*)(((txByte*)array->value.array.address) - sizeof(txChunk)))->size) / sizeof(txSlot);
      while (offset < size) {
        txSlot* slot = array->value.array.address + offset;
        txIndex index = *((txIndex*)slot);
        keys = fxQueueKey(the, 0, index, keys);
        offset++;
      }
    }
  }
  return keys;
}

txSlot* fxSetIndexProperty(txMachine* the, txSlot* instance, txSlot* array, txIndex index) 
{
  txSlot* address = array->value.array.address;
  txSlot* chunk = address;
  txIndex length = array->value.array.length;
  txIndex current;
  txSize size;
  txSlot* result;
  txSlot* limit;
  txIndex at;
  if (address) {
    current = (((txChunk*)(((txByte*)chunk) - sizeof(txChunk)))->size) / sizeof(txSlot);
    if (length == current) {
      if (index < length) 
        return address + index;
      if (instance->flag & XS_DONT_PATCH_FLAG)
        return C_NULL;
      if (array->flag & XS_DONT_SET_FLAG)
        return C_NULL;
      current++;
      size = fxMultiplyChunkSizes(the, current, sizeof(txSlot));
      chunk = (txSlot*)fxRenewChunk(the, address, size);
      if (!chunk) {
      #ifndef mxNoArrayOverallocation
        if (array->ID == XS_ARRAY_BEHAVIOR) {
          txSize capacity = fxSizeToCapacity(the, size);
          chunk = (txSlot*)fxNewGrowableChunk(the, size, capacity);
        }
        else
      #endif
          chunk = (txSlot*)fxNewChunk(the, size);
        address = array->value.array.address;
        c_memcpy(chunk, address, length * sizeof(txSlot));
      }
      result = chunk + length;
    }
    else {
      result = address;
      limit = result + current;
      while (result < limit) {
        at = *((txIndex*)result);
        if (at == index)
          return result;
        if (at > index)
          break;
        result++;
      }
      if (instance->flag & XS_DONT_PATCH_FLAG)
        return C_NULL;
      if ((array->flag & XS_DONT_SET_FLAG) && (index >= length))
        return C_NULL;
      at = mxPtrDiff(result - address);
      current++;
      size = fxMultiplyChunkSizes(the, current, sizeof(txSlot));
      chunk = (txSlot*)fxNewChunk(the, size);
      address = array->value.array.address;
      result = address + at;
      limit = address + current - 1;
      if (result > address)
        c_memcpy(chunk, address, (result - address) * sizeof(txSlot));
      if (result < limit)
        c_memcpy(chunk + (result - address) + 1, result, (limit - result) * sizeof(txSlot));
      result = chunk + (result - address);
    }
  }
  else {
        if (instance->flag & XS_DONT_PATCH_FLAG)
            return C_NULL;
    if ((array->flag & XS_DONT_SET_FLAG) && (index >= length))
      return C_NULL;
    current = 1;
    chunk = (txSlot*)fxNewChunk(the, sizeof(txSlot));
    result = chunk;
  }
  result->next = C_NULL;
  result->ID = XS_NO_ID;
  result->flag = XS_NO_FLAG;
  result->kind = XS_UNDEFINED_KIND;
  *((txIndex*)result) = index;  
  array->value.array.address = chunk;
  if (index >= length) {
    array->value.array.length = index + 1;
  }
  return result;
}

void fxSetIndexSize(txMachine* the, txSlot* array, txIndex target, txBoolean growable)
{
  txSlot* address = array->value.array.address;
  txSlot* chunk = C_NULL;
  txIndex current = (address) ? (((txChunk*)(((txByte*)address) - sizeof(txChunk)))->size) / sizeof(txSlot) : 0;
  txSize size;
  if (current != target) {
    if (array->flag & XS_DONT_SET_FLAG)
      mxTypeError("set length: not writable");
    size = fxMultiplyChunkSizes(the, target, sizeof(txSlot));
    if (address) {
      if (target) {
        chunk = (txSlot*)fxRenewChunk(the, address, size);
        if (!chunk) {
        #ifndef mxNoArrayOverallocation
          if (growable) {
            txSize capacity = fxSizeToCapacity(the, size);
            chunk = (txSlot*)fxNewGrowableChunk(the, size, capacity);
          }
          else
        #endif
            chunk = (txSlot*)fxNewChunk(the, size);
          address = array->value.array.address;
          if (current < target)
            c_memcpy(chunk, address, current * sizeof(txSlot));
          else
            c_memcpy(chunk, address, size);
        }
      }
    }
    else {
    #ifndef mxNoArrayOverallocation
      if (growable) {
        txSize capacity = fxSizeToCapacity(the, size);
        chunk = (txSlot*)fxNewGrowableChunk(the, size, capacity);
      }
      else
    #endif
        chunk = (txSlot*)fxNewChunk(the, size);
    }
    if (current < target)
      c_memset(chunk + current, 0, (target - current) * sizeof(txSlot));
    array->value.array.length = target;
    array->value.array.address = chunk;
  }
}

txBoolean fxDefinePrivateProperty(txMachine* the, txSlot* instance, txSlot* check, txID id, txSlot* slot, txFlag mask) 
{
  txSlot** address;
  txSlot* property;
  mxCheck(the, instance->kind == XS_INSTANCE_KIND);
#if mxAliasInstance
  if (instance->ID) {
    txSlot* alias = the->aliasArray[instance->ID];
    if (alias)
      instance = alias;
    else
      instance = fxAliasInstance(the, instance);
  }
  if (instance->flag & XS_MARK_FLAG)
    return 0;
#else
  if (instance->flag & XS_DONT_MARSHALL_FLAG)
    return 0;
#endif
  address = &(instance->next);
  while ((property = *address)) {
    if (!(property->flag & XS_INTERNAL_FLAG)) {
      property = C_NULL;
      break;
    }
    if (property->kind == XS_PRIVATE_KIND) {
      if (property->value.private.check == check) {
        break;
      }
    }
    address = &(property->next);
  }
  if (!property) {
    property = fxNewSlot(the);
    property->next = *address;
    property->flag = XS_INTERNAL_FLAG;
    property->kind = XS_PRIVATE_KIND;
    property->value.private.check = check;
    property->value.private.first = C_NULL;
    *address = property;
  }
  address = &(property->value.private.first);
  while ((property = *address)) {
    if (property->ID == id)
      break;
    address = &(property->next);
  }
  if (mask & XS_ACCESSOR_FLAG) {
    if (property) {
      if (property->kind != XS_ACCESSOR_KIND)
        return 0;
    }
    else {
      *address = property = fxNewSlot(the);
      property->ID = id;
      property->kind = XS_ACCESSOR_KIND;
      property->value.accessor.getter = C_NULL;
      property->value.accessor.setter = C_NULL;
    }
    if (mask & XS_GETTER_FLAG) {
      txSlot* function = slot->value.accessor.getter;
      if (property->value.accessor.getter)
        return 0;
      property->value.accessor.getter = function;
      if (mxIsFunction(function)) {
        if (((mask & XS_METHOD_FLAG) && (function->flag & XS_MARK_FLAG) == 0)) {
          txSlot* home = mxFunctionInstanceHome(function);
          home->value.home.object = instance;
        }
        if ((mask & XS_NAME_FLAG) && ((function->flag & XS_MARK_FLAG) == 0))
          fxRenameFunction(the, function, id, 0, mxID(_get), "get ");
      }
    }
    else {
      txSlot* function = slot->value.accessor.setter;
      if (property->value.accessor.setter)
        return 0;
      property->value.accessor.setter = function;
      if (mxIsFunction(function)) {
        if (((mask & XS_METHOD_FLAG) && (function->flag & XS_MARK_FLAG) == 0)) {
          txSlot* home = mxFunctionInstanceHome(function);
          home->value.home.object = instance;
        }
        if ((mask & XS_NAME_FLAG) && ((function->flag & XS_MARK_FLAG) == 0))
          fxRenameFunction(the, function, id, 0, mxID(_set), "set ");
      }
    }
  }
  else {
    if (property)
      return 0;
    *address = property = fxNewSlot(the);
    property->flag = (mask & XS_METHOD_FLAG) ? XS_DONT_SET_FLAG : XS_NO_FLAG;
    property->ID = id;
    property->kind = slot->kind;
    property->value = slot->value;
    if (property->kind == XS_REFERENCE_KIND) {
      txSlot* function = slot->value.reference;
      if (mxIsFunction(function)) {
        if ((mask & XS_METHOD_FLAG) && ((function->flag & XS_MARK_FLAG) == 0)) {
          txSlot* home = mxFunctionInstanceHome(function);
          home->value.home.object = instance;
        }
        if ((mask & XS_NAME_FLAG) && ((function->flag & XS_MARK_FLAG) == 0))
          fxRenameFunction(the, function, id, 0, mxID(_value), C_NULL);
      }
    }
  }
  return 1;
}

txSlot* fxGetPrivateProperty(txMachine* the, txSlot* instance, txSlot* check, txID id) 
{
    txSlot* result;
  mxCheck(the, instance->kind == XS_INSTANCE_KIND);
#if mxAliasInstance
  if (instance->ID) {
    txSlot* alias = the->aliasArray[instance->ID];
    if (alias)
      instance = alias;
  }
#endif
  result = instance->next;
  while (result) {
    if (result->kind == XS_PRIVATE_KIND) {
      if (result->value.private.check == check)
        break;
    }
    result = result->next;
  }
  if (result) {
    result = result->value.private.first;
    while (result) {
      if (result->ID == id)
        break;
      result = result->next;
    }
  }
  if (result) {
    if ((result->kind == XS_ACCESSOR_KIND) && (result->value.accessor.getter == C_NULL))
      result = C_NULL;
  }
  return result;
}

txSlot* fxSetPrivateProperty(txMachine* the, txSlot* instance, txSlot* check, txID id) 
{
    txSlot* result;
  mxCheck(the, instance->kind == XS_INSTANCE_KIND);
#if mxAliasInstance
  if (instance->ID) {
    txSlot* alias = the->aliasArray[instance->ID];
    if (alias)
      instance = alias;
    else
      instance = fxAliasInstance(the, instance);
  }
#endif
  result = instance->next;
  while (result) {
    if (result->kind == XS_PRIVATE_KIND) {
      if (result->value.private.check == check)
        break;
    }
    result = result->next;
  }
  if (result) {
    result = result->value.private.first;
    while (result) {
      if (result->ID == id)
        break;
      result = result->next;
    }
  }
  if (result) {
    if ((result->kind == XS_ACCESSOR_KIND) && (result->value.accessor.setter == C_NULL))
      result = C_NULL;
  }
  return result;
}

void fxGroupBy(txMachine* the, txCallback aux) 
{
  txSlot *function, *iterable, *iterator, *next, *value, *slot;
  txNumber k = 0;
  if ((mxArgc < 1) || mxIsUndefined(mxArgv(0)) || mxIsUndefined(mxArgv(1)))
    mxTypeError("items: not an object");
  if ((mxArgc < 2) || (!fxIsCallable(the, mxArgv(1))))
    mxTypeError("callback: not a function");
  function = mxArgv(1);
  iterable = mxArgv(0);
  mxTemporary(iterator);
  mxTemporary(next);
  fxGetIterator(the, iterable, iterator, next, 0);
  mxTemporary(value);
  while (fxIteratorNext(the, iterator, next, value)) {
    mxTry(the) {
      if (k > C_MAX_SAFE_INTEGER)
        mxTypeError("unsafe integer");
      mxPushUndefined();
      mxPushSlot(function);
      mxCall();
      mxPushSlot(value);
      mxPushNumber(k);
      mxRunCount(2);
      aux(the);
      slot = the->stack->value.reference->next;
      slot->value.array.length++;
      while (slot->next)
        slot = slot->next;
      slot->next = fxDuplicateSlot(the, value);
      mxPop();
      mxPop();
      k++;
    }
    mxCatch(the) {
      fxIteratorReturn(the, iterator, 1);
      fxJump(the);
    }
  }
  mxPop();
  mxPop();
  mxPop();
}







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Created: 2025-06-13 06:10