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1 /* |
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2 * Copyright (c) 1997, 2013, 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, int utf8_length, 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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70 |
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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 |