Mercurial > hg > truffle
diff src/share/vm/utilities/utf8.hpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/utilities/utf8.hpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,76 @@ +/* + * Copyright 1997-2003 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +// Low-level interface for UTF8 strings + +class UTF8 : AllStatic { + public: + // returns the unicode length of a 0-terminated uft8 string + static int unicode_length(const char* uft8_str); + + // returns the unicode length of a non-0-terminated uft8 string + static int unicode_length(const char* uft8_str, int len); + + // converts a uft8 string to a unicode string + static void convert_to_unicode(const char* utf8_str, jchar* unicode_buffer, int unicode_length); + + // decodes the current utf8 character, stores the result in value, + // and returns the end of the current uft8 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 uft8 chararacter. + static char* next_character(const char* str, jint* value); + + // Utility methods + static jbyte* strrchr(jbyte* base, int length, jbyte c); + static bool equal(jbyte* base1, int length1, 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); +};