Mercurial > hg > truffle
annotate src/share/vm/utilities/utf8.hpp @ 2177:3582bf76420e
6990754: Use native memory and reference counting to implement SymbolTable
Summary: move symbols from permgen into C heap and reference count them
Reviewed-by: never, acorn, jmasa, stefank
| author | coleenp |
|---|---|
| date | Thu, 27 Jan 2011 16:11:27 -0800 |
| parents | f95d63e2154a |
| children | 1d1603768966 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
| 0 | 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 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_UTILITIES_UTF8_HPP |
| 26 #define SHARE_VM_UTILITIES_UTF8_HPP | |
| 27 | |
| 28 #include "memory/allocation.hpp" | |
| 29 #include "utilities/top.hpp" | |
| 30 | |
| 0 | 31 // Low-level interface for UTF8 strings |
| 32 | |
| 33 class UTF8 : AllStatic { | |
| 34 public: | |
| 35 // returns the unicode length of a 0-terminated uft8 string | |
| 36 static int unicode_length(const char* uft8_str); | |
| 37 | |
| 38 // returns the unicode length of a non-0-terminated uft8 string | |
| 39 static int unicode_length(const char* uft8_str, int len); | |
| 40 | |
| 41 // converts a uft8 string to a unicode string | |
| 42 static void convert_to_unicode(const char* utf8_str, jchar* unicode_buffer, int unicode_length); | |
| 43 | |
| 44 // decodes the current utf8 character, stores the result in value, | |
| 45 // and returns the end of the current uft8 chararacter. | |
| 46 static char* next(const char* str, jchar* value); | |
| 47 | |
| 48 // decodes the current utf8 character, gets the supplementary character instead of | |
| 49 // the surrogate pair when seeing a supplementary character in string, | |
| 50 // stores the result in value, and returns the end of the current uft8 chararacter. | |
| 51 static char* next_character(const char* str, jint* value); | |
| 52 | |
| 53 // Utility methods | |
|
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54 static const jbyte* strrchr(const jbyte* base, int length, jbyte c); |
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55 static bool equal(const jbyte* base1, int length1, const jbyte* base2,int length2); |
| 0 | 56 static bool is_supplementary_character(const unsigned char* str); |
| 57 static jint get_supplementary_character(const unsigned char* str); | |
| 58 }; | |
| 59 | |
| 60 | |
| 61 // Low-level interface for UNICODE strings | |
| 62 | |
| 63 // A unicode string represents a string in the UTF-16 format in which supplementary | |
| 64 // characters are represented by surrogate pairs. Index values refer to char code | |
| 65 // units, so a supplementary character uses two positions in a unicode string. | |
| 66 | |
| 67 class UNICODE : AllStatic { | |
| 68 public: | |
| 69 // returns the utf8 size of a unicode character | |
| 70 static int utf8_size(jchar c); | |
| 71 | |
| 72 // returns the utf8 length of a unicode string | |
| 73 static int utf8_length(jchar* base, int length); | |
| 74 | |
| 75 // converts a unicode string to utf8 string | |
| 76 static void convert_to_utf8(const jchar* base, int length, char* utf8_buffer); | |
| 77 | |
| 78 // converts a unicode string to a utf8 string; result is allocated | |
| 79 // in resource area unless a buffer is provided. | |
| 80 static char* as_utf8(jchar* base, int length); | |
| 81 static char* as_utf8(jchar* base, int length, char* buf, int buflen); | |
| 82 }; | |
| 1972 | 83 |
| 84 #endif // SHARE_VM_UTILITIES_UTF8_HPP |