| /* |
| * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * 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). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_VM_UTILITIES_UTF8_HPP |
| #define SHARE_VM_UTILITIES_UTF8_HPP |
| |
| #include "memory/allocation.hpp" |
| #include "utilities/top.hpp" |
| |
| // Low-level interface for UTF8 strings |
| |
| class UTF8 : AllStatic { |
| public: |
| // returns the unicode length of a 0-terminated utf8 string |
| static int unicode_length(const char* utf8_str); |
| |
| // returns the unicode length of a non-0-terminated utf8 string |
| static int unicode_length(const char* utf8_str, int len); |
| |
| // converts a utf8 string to a unicode string |
| static void convert_to_unicode(const char* utf8_str, jchar* unicode_buffer, int unicode_length); |
| |
| // returns the quoted ascii length of a utf8 string |
| static int quoted_ascii_length(const char* utf8_str, int utf8_length); |
| |
| // converts a utf8 string to quoted ascii |
| static void as_quoted_ascii(const char* utf8_str, int utf8_length, char* buf, int buflen); |
| |
| // converts a quoted ascii string to utf8 string. returns the original |
| // string unchanged if nothing needs to be done. |
| static const char* from_quoted_ascii(const char* quoted_ascii_string); |
| |
| // decodes the current utf8 character, stores the result in value, |
| // and returns the end of the current utf8 chararacter. |
| static char* next(const char* str, jchar* value); |
| |
| // decodes the current utf8 character, gets the supplementary character instead of |
| // the surrogate pair when seeing a supplementary character in string, |
| // stores the result in value, and returns the end of the current utf8 chararacter. |
| static char* next_character(const char* str, jint* value); |
| |
| // Utility methods |
| static const jbyte* strrchr(const jbyte* base, int length, jbyte c); |
| static bool equal(const jbyte* base1, int length1, const jbyte* base2,int length2); |
| static bool is_supplementary_character(const unsigned char* str); |
| static jint get_supplementary_character(const unsigned char* str); |
| }; |
| |
| |
| // Low-level interface for UNICODE strings |
| |
| // A unicode string represents a string in the UTF-16 format in which supplementary |
| // characters are represented by surrogate pairs. Index values refer to char code |
| // units, so a supplementary character uses two positions in a unicode string. |
| |
| class UNICODE : AllStatic { |
| public: |
| // returns the utf8 size of a unicode character |
| static int utf8_size(jchar c); |
| |
| // returns the utf8 length of a unicode string |
| static int utf8_length(jchar* base, int length); |
| |
| // converts a unicode string to utf8 string |
| static void convert_to_utf8(const jchar* base, int length, char* utf8_buffer); |
| |
| // converts a unicode string to a utf8 string; result is allocated |
| // in resource area unless a buffer is provided. |
| static char* as_utf8(jchar* base, int length); |
| static char* as_utf8(jchar* base, int length, char* buf, int buflen); |
| |
| // returns the quoted ascii length of a unicode string |
| static int quoted_ascii_length(jchar* base, int length); |
| |
| // converts a utf8 string to quoted ascii |
| static void as_quoted_ascii(const jchar* base, int length, char* buf, int buflen); |
| }; |
| |
| #endif // SHARE_VM_UTILITIES_UTF8_HPP |