8141132: JEP 254: Compact Strings
Summary: Adopt a more space-efficient internal representation for strings.
Reviewed-by: alanb, bdelsart, coleenp, iklam, jiangli, jrose, kevinw, naoto, pliden, roland, smarks, twisti
Contributed-by: Brent Christian <brent.christian@oracle.com>, Vivek Deshpande <vivek.r.deshpande@intel.com>, Tobias Hartmann <tobias.hartmann@oracle.com>, Charlie Hunt <charlie.hunt@oracle.com>, Vladimir Kozlov <vladimir.kozlov@oracle.com>, Roger Riggs <roger.riggs@oracle.com>, Xueming Shen <xueming.shen@oracle.com>, Aleksey Shipilev <aleksey.shipilev@oracle.com>, Sandhya Viswanathan <sandhya.viswanathan@intel.com>
/*
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
#include "precompiled.hpp"
#include "ci/ciTypeArray.hpp"
#include "ci/ciUtilities.hpp"
// ciTypeArray
//
// This class represents an typeArrayOop in the HotSpot virtual
// machine.
// ------------------------------------------------------------------
// ciTypeArray::char_at
//
// Implementation of the char_at method.
jchar ciTypeArray::char_at(int index) {
VM_ENTRY_MARK;
assert(index >= 0 && index < length(), "out of range");
jchar c = get_typeArrayOop()->char_at(index);
#ifdef ASSERT
jchar d = element_value(index).as_char();
assert(c == d, "");
#endif //ASSERT
return c;
}
// ------------------------------------------------------------------
// ciTypeArray::byte_at
//
// Implementation of the byte_at method.
jbyte ciTypeArray::byte_at(int index) {
VM_ENTRY_MARK;
assert(index >= 0 && index < length(), "out of range");
return get_typeArrayOop()->byte_at(index);
}