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author | geronimo <geronimo013@gmx.de> | 2012-07-13 04:26:40 +0200 |
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committer | geronimo <geronimo013@gmx.de> | 2012-07-13 04:26:40 +0200 |
commit | 2d48ae784ea6828e8626c32c848f64232d8f35c0 (patch) | |
tree | fab114b03e91125783a778b835dd1913b039cebe /libs/vdr/include/CharsetConv.h | |
download | cmp-2d48ae784ea6828e8626c32c848f64232d8f35c0.tar.gz cmp-2d48ae784ea6828e8626c32c848f64232d8f35c0.tar.bz2 |
initial import
Diffstat (limited to 'libs/vdr/include/CharsetConv.h')
-rw-r--r-- | libs/vdr/include/CharsetConv.h | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/libs/vdr/include/CharsetConv.h b/libs/vdr/include/CharsetConv.h new file mode 100644 index 0000000..3a05f56 --- /dev/null +++ b/libs/vdr/include/CharsetConv.h @@ -0,0 +1,115 @@ +/** + * File: CharsetConv.h + * Project: libvdr - classes taken from vdr-project + * + * from "Video Disk Recorder": + * + * Copyright (C) 2000, 2003, 2006, 2008 Klaus Schmidinger + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program 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 for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + * Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html + * + * The original author can be reached at kls@tvdr.de + * + * The vdr project's page is at http://www.tvdr.de + * + */ +#ifndef CHARSETCONV_H +#define CHARSETCONV_H + +#include <stddef.h> +#include <sys/types.h> +#include <iconv.h> +typedef unsigned char uchar; + +// When handling strings that might contain UTF-8 characters, it may be necessary +// to process a "symbol" that consists of several actual character bytes. The +// following functions allow transparently accessing a "char *" string without +// having to worry about what character set is actually used. + +int Utf8CharLen(const char *s); + ///< Returns the number of character bytes at the beginning of the given + ///< string that form a UTF-8 symbol. +uint Utf8CharGet(const char *s, int Length = 0); + ///< Returns the UTF-8 symbol at the beginning of the given string. + ///< Length can be given from a previous call to Utf8CharLen() to avoid calculating + ///< it again. If no Length is given, Utf8CharLen() will be called. +int Utf8CharSet(uint c, char *s = NULL); + ///< Converts the given UTF-8 symbol to a sequence of character bytes and copies + ///< them to the given string. Returns the number of bytes written. If no string + ///< is given, only the number of bytes is returned and nothing is copied. +int Utf8SymChars(const char *s, int Symbols); + ///< Returns the number of character bytes at the beginning of the given + ///< string that form at most the given number of UTF-8 symbols. +int Utf8StrLen(const char *s); + ///< Returns the number of UTF-8 symbols formed by the given string of + ///< character bytes. +char *Utf8Strn0Cpy(char *Dest, const char *Src, int n); + ///< Copies at most n character bytes from Src to Dest, making sure that the + ///< resulting copy ends with a complete UTF-8 symbol. The copy is guaranteed + ///< to be zero terminated. + ///< Returns a pointer to Dest. +int Utf8ToArray(const char *s, uint *a, int Size); + ///< Converts the given character bytes (including the terminating 0) into an + ///< array of UTF-8 symbols of the given Size. Returns the number of symbols + ///< in the array (without the terminating 0). +int Utf8FromArray(const uint *a, char *s, int Size, int Max = -1); + ///< Converts the given array of UTF-8 symbols (including the terminating 0) + ///< into a sequence of character bytes of at most Size length. Returns the + ///< number of character bytes written (without the terminating 0). + ///< If Max is given, only that many symbols will be converted. + ///< The resulting string is always zero-terminated if Size is big enough. + +// When allocating buffer space, make sure we reserve enough space to hold +// a string in UTF-8 representation: + +#define Utf8BufSize(s) ((s) * 4) + +// The following macros automatically use the correct versions of the character +// class functions: + +#define Utf8to(conv, c) (cCharSetConv::SystemCharacterTable() ? to##conv(c) : tow##conv(c)) +#define Utf8is(ccls, c) (cCharSetConv::SystemCharacterTable() ? is##ccls(c) : isw##ccls(c)) + +class cCharSetConv { +public: + cCharSetConv(const char *FromCode = NULL, const char *ToCode = NULL); + ///< Sets up a character set converter to convert from FromCode to ToCode. + ///< If FromCode is NULL, the previously set systemCharacterTable is used + ///< (or "UTF-8" if no systemCharacterTable has been set). + ///< If ToCode is NULL, "UTF-8" is used. + ~cCharSetConv(); + const char *Convert(const char *From, char *To = NULL, size_t ToLength = 0); + ///< Converts the given Text from FromCode to ToCode (as set in the constructor). + ///< If To is given, it is used to copy at most ToLength bytes of the result + ///< (including the terminating 0) into that buffer. If To is not given, + ///< the result is copied into a dynamically allocated buffer and is valid as + ///< long as this object lives, or until the next call to Convert(). The + ///< return value always points to the result if the conversion was successful + ///< (even if a fixed size To buffer was given and the result didn't fit into + ///< it). If the string could not be converted, the result points to the + ///< original From string. + static const char *SystemCharacterTable(void) { return systemCharacterTable; } + static void SetSystemCharacterTable(const char *CharacterTable); + +private: + iconv_t cd; + char *result; + size_t length; + static char *systemCharacterTable; + }; + +#endif /* CHARSETCONV_H */ + |