dByteArray_prims.cpp

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/* Copyright 1994, 1995 LongView Technologies L.L.C. $Revision: 1.18 $ */
/* Copyright (c) 2006, Sun Microsystems, Inc.
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# include "incls/_precompiled.incl"
# include "incls/_dByteArray_prims.cpp.incl"

TRACE_FUNC(TraceDoubleByteArrayPrims, "doubleByteArray")

int doubleByteArrayPrimitives::number_of_calls;

#define ASSERT_RECEIVER assert(receiver->is_doubleByteArray(), "receiver must be double byte array")


PRIM_DECL_2(doubleByteArrayPrimitives::allocateSize, oop receiver, oop argument) {
  PROLOGUE_2("allocateSize", receiver, argument)
  assert(receiver->is_klass() && klassOop(receiver)->klass_part()->oop_is_doubleByteArray(),
         "receiver must double byte array class");
  if (!argument->is_smi())
    markSymbol(vmSymbols::first_argument_has_wrong_type());

  if (smiOop(argument)->value() < 0)
    return markSymbol(vmSymbols::negative_size());

  klassOop k        = klassOop(receiver);
  int      ni_size  = k->klass_part()->non_indexable_size();
  int      obj_size = ni_size + 1 + roundTo(smiOop(argument)->value() * 2, oopSize) / oopSize;
  // allocate
  doubleByteArrayOop obj = as_doubleByteArrayOop(Universe::allocate(obj_size, (memOop*)&k));
  // header
  memOop(obj)->initialize_header(true, k);
  // instance variables
  memOop(obj)->initialize_body(memOopDesc::header_size(), ni_size);
  // indexables
  oop* base = (oop*) obj->addr();
  oop* end  = base + obj_size;
  // %optimized 'obj->set_length(size)'
  base[ni_size] = argument;
  // %optimized 'for (int index = 1; index <= size; index++)
  //               obj->doubleByte_at_put(index, 0)'
  base = &base[ni_size+1];
  while (base < end) *base++ = (oop) 0;
  return obj;
}

PRIM_DECL_1(doubleByteArrayPrimitives::size, oop receiver) {
  PROLOGUE_1("size", receiver);
  ASSERT_RECEIVER;

  // do the operation
  return as_smiOop(doubleByteArrayOop(receiver)->length());
}

PRIM_DECL_2(doubleByteArrayPrimitives::at, oop receiver, oop index) {
  PROLOGUE_2("at", receiver, index);
  ASSERT_RECEIVER;

  // check index type
  if (!index->is_smi())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  // check index value
  if (!doubleByteArrayOop(receiver)->is_within_bounds(smiOop(index)->value()))
     return markSymbol(vmSymbols::out_of_bounds());

  return as_smiOop(doubleByteArrayOop(receiver)->doubleByte_at(smiOop(index)->value()));
}

PRIM_DECL_3(doubleByteArrayPrimitives::atPut, oop receiver, oop index, oop value) {
  PROLOGUE_3("atPut", receiver, index, value);
  ASSERT_RECEIVER;

  // check index type
  if (!index->is_smi())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  // check value type
  if (!value->is_smi())
    return markSymbol(vmSymbols::second_argument_has_wrong_type());

  // check index value
  if (!doubleByteArrayOop(receiver)->is_within_bounds(smiOop(index)->value()))
     return markSymbol(vmSymbols::out_of_bounds());

  // check value as double byte
  unsigned int v = (unsigned int) smiOop(value)->value();
  if (v  >= (1<<16))
      return markSymbol(vmSymbols::value_out_of_range());

  // do the operation
  doubleByteArrayOop(receiver)->doubleByte_at_put(smiOop(index)->value(), v);
  return receiver;
}


PRIM_DECL_2(doubleByteArrayPrimitives::compare, oop receiver, oop argument) {
  PROLOGUE_2("compare", receiver, argument);
  ASSERT_RECEIVER;

  if(receiver == argument)
    return as_smiOop(0);

  if (argument->is_doubleByteArray())
    return as_smiOop(doubleByteArrayOop(receiver)->compare(doubleByteArrayOop(argument)));

  if (argument->is_byteArray())
    return as_smiOop(- byteArrayOop(argument)->compare_doubleBytes(doubleByteArrayOop(receiver)));

  return markSymbol(vmSymbols::first_argument_has_wrong_type());
}

PRIM_DECL_1(doubleByteArrayPrimitives::intern, oop receiver) {
  PROLOGUE_1("intern", receiver);
  ASSERT_RECEIVER;

  ResourceMark rm;
  int   len    = doubleByteArrayOop(receiver)->length();
  char* buffer = NEW_RESOURCE_ARRAY(char, len);

  for (int i = 0; i < len; i++) {
    int c = doubleByteArrayOop(receiver)->doubleByte_at(i + 1);
    if (c >= (1<<8)) {
      return markSymbol(vmSymbols::value_out_of_range());
    }
    buffer[i] = c;
  }
  symbolOop sym = Universe::symbol_table->lookup(buffer, len);
  return sym;
}

PRIM_DECL_2(doubleByteArrayPrimitives::characterAt, oop receiver, oop index) {
  PROLOGUE_2("characterAt", receiver, index);
  ASSERT_RECEIVER;

  // check index type
  if (!index->is_smi()) 
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  // range check
  if (!doubleByteArrayOop(receiver)->is_within_bounds(smiOop(index)->value()))
    return markSymbol(vmSymbols::out_of_bounds());

  // fetch double byte
  doubleByte byte = doubleByteArrayOop(receiver)->doubleByte_at(smiOop(index)->value());
 
  if (byte < 256) {
    // return the byte+1'th element in asciiCharacter
    return Universe::asciiCharacters()->obj_at(byte+1);
  } else return markSymbol(vmSymbols::out_of_bounds());
}


PRIM_DECL_1(doubleByteArrayPrimitives::hash, oop receiver) {
  PROLOGUE_1("intern", receiver);
  ASSERT_RECEIVER;
  return as_smiOop(doubleByteArrayOop(receiver)->hash_value());
}

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