jdk8-mips64-public/hotspot: src/share/vm/classfile/classFileStream.hpp@f95d63e2154a

6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg

     1 /*

     2  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.

     8  *

     9  * This code is distributed in the hope that it will be useful, but WITHOUT

    10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    12  * version 2 for more details (a copy is included in the LICENSE file that

    13  * accompanied this code).

    14  *

    15  * You should have received a copy of the GNU General Public License version

    16  * 2 along with this work; if not, write to the Free Software Foundation,

    17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    18  *

    19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    20  * or visit www.oracle.com if you need additional information or have any

    21  * questions.

    22  *

    23  */

    25 #ifndef SHARE_VM_CLASSFILE_CLASSFILESTREAM_HPP

    26 #define SHARE_VM_CLASSFILE_CLASSFILESTREAM_HPP

    28 #include "utilities/top.hpp"

    29 #ifdef TARGET_ARCH_x86

    30 # include "bytes_x86.hpp"

    31 #endif

    32 #ifdef TARGET_ARCH_sparc

    33 # include "bytes_sparc.hpp"

    34 #endif

    35 #ifdef TARGET_ARCH_zero

    36 # include "bytes_zero.hpp"

    37 #endif

    39 // Input stream for reading .class file

    40 //

    41 // The entire input stream is present in a buffer allocated by the caller.

    42 // The caller is responsible for deallocating the buffer and for using

    43 // ResourceMarks appropriately when constructing streams.

    45 class ClassFileStream: public ResourceObj {

    46  private:

    47   u1*   _buffer_start; // Buffer bottom

    48   u1*   _buffer_end;   // Buffer top (one past last element)

    49   u1*   _current;      // Current buffer position

    50   char* _source;       // Source of stream (directory name, ZIP/JAR archive name)

    51   bool  _need_verify;  // True if verification is on for the class file

    53   void truncated_file_error(TRAPS);

    54  public:

    55   // Constructor

    56   ClassFileStream(u1* buffer, int length, char* source);

    58   // Buffer access

    59   u1* buffer() const           { return _buffer_start; }

    60   int length() const           { return _buffer_end - _buffer_start; }

    61   u1* current() const          { return _current; }

    62   void set_current(u1* pos)    { _current = pos; }

    63   char* source() const         { return _source; }

    64   void set_verify(bool flag)   { _need_verify = flag; }

    66   void check_truncated_file(bool b, TRAPS) {

    67     if (b) {

    68       truncated_file_error(THREAD);

    69     }

    70   }

    72   void guarantee_more(int size, TRAPS) {

    73     size_t remaining = (size_t)(_buffer_end - _current);

    74     unsigned int usize = (unsigned int)size;

    75     check_truncated_file(usize > remaining, CHECK);

    76   }

    78   // Read u1 from stream

    79   u1 get_u1(TRAPS);

    80   u1 get_u1_fast() {

    81     return *_current++;

    82   }

    84   // Read u2 from stream

    85   u2 get_u2(TRAPS);

    86   u2 get_u2_fast() {

    87     u2 res = Bytes::get_Java_u2(_current);

    88     _current += 2;

    89     return res;

    90   }

    92   // Read u4 from stream

    93   u4 get_u4(TRAPS);

    94   u4 get_u4_fast() {

    95     u4 res = Bytes::get_Java_u4(_current);

    96     _current += 4;

    97     return res;

    98   }

   100   // Read u8 from stream

   101   u8 get_u8(TRAPS);

   102   u8 get_u8_fast() {

   103     u8 res = Bytes::get_Java_u8(_current);

   104     _current += 8;

   105     return res;

   106   }

   108   // Get direct pointer into stream at current position.

   109   // Returns NULL if length elements are not remaining. The caller is

   110   // responsible for calling skip below if buffer contents is used.

   111   u1* get_u1_buffer() {

   112     return _current;

   113   }

   115   u2* get_u2_buffer() {

   116     return (u2*) _current;

   117   }

   119   // Skip length u1 or u2 elements from stream

   120   void skip_u1(int length, TRAPS);

   121   void skip_u1_fast(int length) {

   122     _current += length;

   123   }

   125   void skip_u2(int length, TRAPS);

   126   void skip_u2_fast(int length) {

   127     _current += 2 * length;

   128   }

   130   // Tells whether eos is reached

   131   bool at_eos() const          { return _current == _buffer_end; }

   132 };

   134 #endif // SHARE_VM_CLASSFILE_CLASSFILESTREAM_HPP

Mercurial > jdk8-mips64-public > hotspot / file revision

src/share/vm/classfile/classFileStream.hpp@f95d63e2154a

src/share/vm/classfile/classFileStream.hpp