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annotate src/share/vm/utilities/utf8.hpp @ 6972:bd7a7ce2e264

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6830717: replay of compilations would help with debugging Summary: When java process crashed in compiler thread, repeat the compilation process will help finding root cause. This is done with using SA dump application class data and replay data from core dump, then use debug version of jvm to recompile the problematic java method. Reviewed-by: kvn, twisti, sspitsyn Contributed-by: yumin.qi@oracle.com
author minqi
date Mon, 12 Nov 2012 14:03:53 -0800
parents 1d1603768966
children 8c03fc47511d
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1 /*
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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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.
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22 *
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23 */
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24
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25 #ifndef SHARE_VM_UTILITIES_UTF8_HPP
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26 #define SHARE_VM_UTILITIES_UTF8_HPP
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27
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28 #include "memory/allocation.hpp"
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29 #include "utilities/top.hpp"
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30
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31 // Low-level interface for UTF8 strings
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32
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33 class UTF8 : AllStatic {
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34 public:
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35 // returns the unicode length of a 0-terminated utf8 string
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36 static int unicode_length(const char* utf8_str);
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37
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38 // returns the unicode length of a non-0-terminated utf8 string
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39 static int unicode_length(const char* utf8_str, int len);
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40
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41 // converts a utf8 string to a unicode string
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42 static void convert_to_unicode(const char* utf8_str, jchar* unicode_buffer, int unicode_length);
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43
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44 // returns the quoted ascii length of a utf8 string
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45 static int quoted_ascii_length(const char* utf8_str, int utf8_length);
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46
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47 // converts a utf8 string to quoted ascii
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48 static void as_quoted_ascii(const char* utf8_str, char* buf, int buflen);
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49
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50 // converts a quoted ascii string to utf8 string. returns the original
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51 // string unchanged if nothing needs to be done.
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52 static const char* from_quoted_ascii(const char* quoted_ascii_string);
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53
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54 // decodes the current utf8 character, stores the result in value,
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55 // and returns the end of the current utf8 chararacter.
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56 static char* next(const char* str, jchar* value);
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57
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58 // decodes the current utf8 character, gets the supplementary character instead of
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59 // the surrogate pair when seeing a supplementary character in string,
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60 // stores the result in value, and returns the end of the current utf8 chararacter.
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61 static char* next_character(const char* str, jint* value);
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62
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63 // Utility methods
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64 static const jbyte* strrchr(const jbyte* base, int length, jbyte c);
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65 static bool equal(const jbyte* base1, int length1, const jbyte* base2,int length2);
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66 static bool is_supplementary_character(const unsigned char* str);
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67 static jint get_supplementary_character(const unsigned char* str);
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68 };
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69
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71 // Low-level interface for UNICODE strings
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72
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73 // A unicode string represents a string in the UTF-16 format in which supplementary
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74 // characters are represented by surrogate pairs. Index values refer to char code
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75 // units, so a supplementary character uses two positions in a unicode string.
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76
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77 class UNICODE : AllStatic {
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78 public:
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79 // returns the utf8 size of a unicode character
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80 static int utf8_size(jchar c);
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81
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82 // returns the utf8 length of a unicode string
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83 static int utf8_length(jchar* base, int length);
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84
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85 // converts a unicode string to utf8 string
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86 static void convert_to_utf8(const jchar* base, int length, char* utf8_buffer);
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87
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88 // converts a unicode string to a utf8 string; result is allocated
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89 // in resource area unless a buffer is provided.
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90 static char* as_utf8(jchar* base, int length);
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91 static char* as_utf8(jchar* base, int length, char* buf, int buflen);
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92
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93 // returns the quoted ascii length of a unicode string
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94 static int quoted_ascii_length(jchar* base, int length);
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95
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96 // converts a utf8 string to quoted ascii
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97 static void as_quoted_ascii(const jchar* base, int length, char* buf, int buflen);
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98 };
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99
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100 #endif // SHARE_VM_UTILITIES_UTF8_HPP