byteArray_prims.cpp

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/* Copyright 1994 - 1996 LongView Technologies L.L.C. $Revision: 1.32 $ */
/* Copyright (c) 2006, Sun Microsystems, Inc.
All rights reserved.

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# include "incls/_precompiled.incl"
# include "incls/_byteArray_prims.cpp.incl"

TRACE_FUNC(TraceByteArrayPrims, "byteArray")

int byteArrayPrimitives::number_of_calls;

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

PRIM_DECL_2(byteArrayPrimitives::allocateSize, oop receiver, oop argument) {
  PROLOGUE_2("allocateSize", receiver, argument)
  assert(receiver->is_klass() && klassOop(receiver)->klass_part()->oop_is_byteArray(),
        "receiver must byte array class");
  if (!argument->is_smi())
    return 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(), oopSize) / oopSize;
  // allocate
  byteArrayOop obj = as_byteArrayOop(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->byte_at_put(index, '\000')'
  base = &base[ni_size+1];
  while (base < end) *base++ = (oop) 0;
  return obj;
}

PRIM_DECL_1(byteArrayPrimitives::size, oop receiver) {
  PROLOGUE_1("size", receiver);
  ASSERT_RECEIVER;
  // do the operation
  return as_smiOop(byteArrayOop(receiver)->length());
}

PRIM_DECL_2(byteArrayPrimitives::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 (!byteArrayOop(receiver)->is_within_bounds(smiOop(index)->value()))
     return markSymbol(vmSymbols::out_of_bounds());

  // do the operation
  return as_smiOop(byteArrayOop(receiver)->byte_at(smiOop(index)->value()));
}

PRIM_DECL_3(byteArrayPrimitives::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 index type
  if (!value->is_smi())
    return markSymbol(vmSymbols::second_argument_has_wrong_type());

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

  // check value range (must be byte)
  unsigned int v = (unsigned int) smiOop(value)->value();
  if (v  >= (1<<8))
    return markSymbol(vmSymbols::value_out_of_range());

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

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

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

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

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

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

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

  return Universe::symbol_table->lookup(byteArrayOop(receiver)->chars(),
                                        byteArrayOop(receiver)->length());
}

PRIM_DECL_2(byteArrayPrimitives::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 (!byteArrayOop(receiver)->is_within_bounds(smiOop(index)->value()))
     return markSymbol(vmSymbols::out_of_bounds());

  // fetch byte
  int byte = byteArrayOop(receiver)->byte_at(smiOop(index)->value());
  
  // return the n+1'th element in asciiCharacter
  return Universe::asciiCharacters()->obj_at(byte+1);
}

PRIM_DECL_2(byteArrayPrimitives::at_all_put, oop receiver, oop value) {
  PROLOGUE_2("at_all_put", receiver, value);
  ASSERT_RECEIVER;

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

  // check value range (must be byte)
  unsigned int v = (unsigned int) smiOop(value)->value();
  if (v  >= (1<<8))
    return markSymbol(vmSymbols::value_out_of_range());

  int length = byteArrayOop(receiver)->length();
  for (int index = 1; index <= length; index++) {
    byteArrayOop(receiver)->byte_at_put(index, v);
  }
  return receiver;
}

// LargeIntegers primitives

oop simplified(byteArrayOop result) {
  // Tries to simplify result, a large integer, into a small integer if possible.
  bool ok;
  oop smi_result = result->number().as_smi(ok);
  return ok ? smi_result : result;
}

PRIM_DECL_2(byteArrayPrimitives::largeIntegerFromSmallInteger, oop receiver, oop number) {
  PROLOGUE_2("largeIntegerFromSmallInteger", receiver, number);
  assert(receiver->is_klass() && klassOop(receiver)->klass_part()->oop_is_byteArray(), "just checking");

  // Check arguments
  if (!number->is_smi()) return markSymbol(vmSymbols::second_argument_has_wrong_type());

  BlockScavenge bs;
  int           i = smiOop(number)->value();
  byteArrayOop  z;

  z = byteArrayOop(klassOop(receiver)->klass_part()->allocateObjectSize(IntegerOps::int_to_Integer_result_size_in_bytes(i)));
  IntegerOps::int_to_Integer(i, z->number());
  return z;
}

PRIM_DECL_2(byteArrayPrimitives::largeIntegerFromDouble, oop receiver, oop number) {
  PROLOGUE_2("largeIntegerFromDouble", receiver, number);
  assert(receiver->is_klass() && klassOop(receiver)->klass_part()->oop_is_byteArray(), "just checking");

  if (!number->is_double()) return markSymbol(vmSymbols::first_argument_has_wrong_type());

  BlockScavenge bs;
  double x = doubleOop(number)->value();
  byteArrayOop z;

  z = byteArrayOop(klassOop(receiver)->klass_part()->allocateObjectSize(IntegerOps::double_to_Integer_result_size_in_bytes(x)));
  IntegerOps::double_to_Integer(x, z->number());
  return z;
}

PRIM_DECL_3(byteArrayPrimitives::largeIntegerFromString, oop receiver, oop argument, oop base) {
  PROLOGUE_3("largeIntegerFromString", receiver, argument, base);
  assert(receiver->is_klass() && klassOop(receiver)->klass_part()->oop_is_byteArray(), "just checking");

  if (!argument->is_byteArray()) return markSymbol(vmSymbols::first_argument_has_wrong_type ());
  if (!base->is_smi()          ) return markSymbol(vmSymbols::second_argument_has_wrong_type());

  BlockScavenge bs;

  byteArrayOop x = byteArrayOop(argument);
  byteArrayOop z;

  z = byteArrayOop(x->klass()->klass_part()->allocateObjectSize(IntegerOps::string_to_Integer_result_size_in_bytes(x->chars(), smiOop(base)->value())));
  IntegerOps::string_to_Integer(x->chars(), smiOop(base)->value(), z->number());
  return z;
}

PRIM_DECL_2(byteArrayPrimitives::largeIntegerAdd, oop receiver, oop argument) {
  PROLOGUE_2("largeIntegerAdd", receiver, argument);
  ASSERT_RECEIVER;

  if (!argument->is_byteArray())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  BlockScavenge bs;

  byteArrayOop x = byteArrayOop(receiver);
  byteArrayOop y = byteArrayOop(argument);
  byteArrayOop z;

  if (!x->number().is_valid() || !y->number().is_valid()) return markSymbol(vmSymbols::argument_is_invalid());

  z = byteArrayOop(x->klass()->klass_part()->allocateObjectSize(IntegerOps::add_result_size_in_bytes(x->number(), y->number())));
  x = byteArrayOop(receiver);
  y = byteArrayOop(argument);
  IntegerOps::add(x->number(), y->number(), z->number());
  return simplified(z);
}

PRIM_DECL_2(byteArrayPrimitives::largeIntegerSubtract, oop receiver, oop argument) {
  PROLOGUE_2("largeIntegerSubtract", receiver, argument);
  ASSERT_RECEIVER;

  if (!argument->is_byteArray())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  BlockScavenge bs;

  byteArrayOop x = byteArrayOop(receiver);
  byteArrayOop y = byteArrayOop(argument);
  byteArrayOop z;

  if (!x->number().is_valid() || !y->number().is_valid()) return markSymbol(vmSymbols::argument_is_invalid());

  z = byteArrayOop(x->klass()->klass_part()->allocateObjectSize(IntegerOps::sub_result_size_in_bytes(x->number(), y->number())));
  x = byteArrayOop(receiver);
  y = byteArrayOop(argument);
  IntegerOps::sub(x->number(), y->number(), z->number());
  return simplified(z);
}

PRIM_DECL_2(byteArrayPrimitives::largeIntegerMultiply, oop receiver, oop argument) {
  PROLOGUE_2("largeIntegerMultiply", receiver, argument);
  ASSERT_RECEIVER;

  if (!argument->is_byteArray())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  BlockScavenge bs;

  byteArrayOop x = byteArrayOop(receiver);
  byteArrayOop y = byteArrayOop(argument);
  byteArrayOop z;

  if (!x->number().is_valid() || !y->number().is_valid()) return markSymbol(vmSymbols::argument_is_invalid());

  z = byteArrayOop(x->klass()->klass_part()->allocateObjectSize(IntegerOps::mul_result_size_in_bytes(x->number(), y->number())));
  x = byteArrayOop(receiver);
  y = byteArrayOop(argument);
  IntegerOps::mul(x->number(), y->number(), z->number());
  return simplified(z);
}

PRIM_DECL_2(byteArrayPrimitives::largeIntegerDiv, oop receiver, oop argument) {
  PROLOGUE_2("largeIntegerDiv", receiver, argument);
  ASSERT_RECEIVER;

  if (!argument->is_byteArray())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  BlockScavenge bs;

  byteArrayOop x = byteArrayOop(receiver);
  byteArrayOop y = byteArrayOop(argument);
  byteArrayOop z;

  if (!x->number().is_valid() || !y->number().is_valid()) return markSymbol(vmSymbols::argument_is_invalid());
  if (y->number().is_zero()                             ) return markSymbol(vmSymbols::division_by_zero   ());

  z = byteArrayOop(x->klass()->klass_part()->allocateObjectSize(IntegerOps::div_result_size_in_bytes(x->number(), y->number())));
  x = byteArrayOop(receiver);
  y = byteArrayOop(argument);
  IntegerOps::div(x->number(), y->number(), z->number());
  return simplified(z);
}

PRIM_DECL_2(byteArrayPrimitives::largeIntegerMod, oop receiver, oop argument) {
  PROLOGUE_2("largeIntegerMod", receiver, argument);
  ASSERT_RECEIVER;

  if (!argument->is_byteArray())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  BlockScavenge bs;

  byteArrayOop x = byteArrayOop(receiver);
  byteArrayOop y = byteArrayOop(argument);
  byteArrayOop z;

  if (!x->number().is_valid() || !y->number().is_valid()) return markSymbol(vmSymbols::argument_is_invalid());
  if (y->number().is_zero()                             ) return markSymbol(vmSymbols::division_by_zero   ());

  z = byteArrayOop(x->klass()->klass_part()->allocateObjectSize(IntegerOps::mod_result_size_in_bytes(x->number(), y->number())));
  x = byteArrayOop(receiver);
  y = byteArrayOop(argument);
  IntegerOps::mod(x->number(), y->number(), z->number());
  return simplified(z);
}

PRIM_DECL_2(byteArrayPrimitives::largeIntegerCompare, oop receiver, oop argument) {
  PROLOGUE_2("largeIntegerCompare", receiver, argument);
  ASSERT_RECEIVER;

  // Check argument
  if (!argument->is_byteArray())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  BlockScavenge bs;

  byteArrayOop x = byteArrayOop(receiver);
  byteArrayOop y = byteArrayOop(argument);

  if (!x->number().is_valid() || !y->number().is_valid()) return markSymbol(vmSymbols::argument_is_invalid());

  int res = IntegerOps::cmp(x->number(), y->number());
  if (res < 0) return as_smiOop(-1);
  if (res > 0) return as_smiOop(1);
  return as_smiOop(0);
}

PRIM_DECL_1(byteArrayPrimitives::largeIntegerToFloat, oop receiver) {
  PROLOGUE_1("largeIntegerToFloat", receiver);
  ASSERT_RECEIVER;

  bool ok;
  double result = byteArrayOop(receiver)->number().as_double(ok);

  if (!ok) return markSymbol(vmSymbols::conversion_failed());

  BlockScavenge bs;
  return oopFactory::new_double(result);
}

PRIM_DECL_2(byteArrayPrimitives::largeIntegerToString, oop receiver, oop base) {
  PROLOGUE_1("largeIntegerToString", receiver);
  ASSERT_RECEIVER;

  // Check argument
  if (!base->is_smi())
    return markSymbol(vmSymbols::first_argument_has_wrong_type());

  BlockScavenge bs;

  byteArrayOop x = byteArrayOop(receiver);
  int length = IntegerOps::Integer_to_string_result_size_in_bytes(x->number(), smiOop(base)->value());

  byteArrayOop result = oopFactory::new_byteArray(length);

  IntegerOps::Integer_to_string(x->number(), smiOop(base)->value(), result->chars());
  return result;
}

PRIM_DECL_1(byteArrayPrimitives::hash, oop receiver) {
  PROLOGUE_1("hash", receiver);
  ASSERT_RECEIVER;
  return as_smiOop(byteArrayOop(receiver)->hash_value());
}

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