From 2c3a2160af8b783b5ab866c70b3a9769a0c3a18f Mon Sep 17 00:00:00 2001 From: Tomasz Sowa Date: Wed, 11 Jan 2012 11:15:36 +0000 Subject: [PATCH] moving utf8.cpp from ezc to pikotools git-svn-id: svn://ttmath.org/publicrep/ezc/trunk@367 e52654a7-88a9-db11-a3e9-0013d4bc506e --- src/utf8.cpp | 896 --------------------------------------------------- 1 file changed, 896 deletions(-) delete mode 100755 src/utf8.cpp diff --git a/src/utf8.cpp b/src/utf8.cpp deleted file mode 100755 index b78d314..0000000 --- a/src/utf8.cpp +++ /dev/null @@ -1,896 +0,0 @@ -/* - * This file is a part of EZC -- Easy templating in C++ - * and is distributed under the (new) BSD licence. - * Author: Tomasz Sowa - */ - -/* - * Copyright (c) 2010-2011, Tomasz Sowa - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * * Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * - * * Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * * Neither the name Tomasz Sowa nor the names of contributors to this - * project may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF - * THE POSSIBILITY OF SUCH DAMAGE. - */ - -#include "utf8.h" - - -namespace Ezc -{ - - - -/*! - an auxiliary function for converting from UTF-8 string -*/ -static bool UTF8ToInt_FirstOctet(unsigned char uz, size_t & len, int & res) -{ - for(len=0 ; (uz & 0x80) != 0 ; ++len) - uz <<= 1; - - if( len == 1 ) - return false; - - res = uz; - - if( len > 0 ) - res >>= len; - - if( res == 0 ) - return false; - - if( len == 0 ) - len = 1; - -return true; -} - - - -/*! - an auxiliary function for converting from UTF-8 string -*/ -static bool UTF8ToInt_AddNextOctet(unsigned char uz, int & res) -{ - if( (uz & 0xc0) != 0x80 ) - return false; - - res <<= 6; - res |= (uz & 0x3F); - -return true; -} - - - - -/*! - returns true if 'c' is a correct unicode character -*/ -bool UTF8_CheckRange(int c) -{ - return c>=0 && c<=0x10FFFF && !(c>=0xD800 && c<=0xDFFF); -} - - - - -/*! - this function converts one UTF-8 character into one wide-character - - input: - utf8 - an input UTF-8 string - utf8_len - size of the input string, - the string should be at least 4 bytes length for correctly - recognized the utf-8 sequence - - output: - res - an output character - correct - true if it is a correct character - - the function returns how many characters have been used from the input string - (returns zero only if utf8_len is zero) - even if there are errors the functions returns a different from zero value -*/ -size_t UTF8ToInt(const char * utf8, size_t utf8_len, int & res, bool & correct) -{ -size_t i, len; - - res = 0; - correct = false; - - if( utf8_len == 0 ) - return 0; - - if( !UTF8ToInt_FirstOctet(utf8[0], len, res) ) - return 1; - - if( utf8_len < len ) - return utf8_len; - - for(i=1 ; i0xffff ) - { - c -= 0x10000; - res += static_cast(((c >> 10) & 0x3FF) + 0xD800); - res += static_cast((c & 0x3FF) + 0xDC00); - } - else - { - res += static_cast(c); - } -} - - - - - -/*! - this function converts an utf8 string into wide string (std::wstring) - - input: - utf8 - an input utf8 string - utf8_len - size of the input string - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - res - an output wide string - - the function returns false if there were some errors when converting -*/ -bool UTF8ToWide(const char * utf8, size_t utf8_len, std::wstring & res, bool clear, int mode) -{ -int z; -size_t len; -bool correct, was_error = false; - - if( clear ) - res.clear(); - - while( utf8_len > 0 ) - { - if( (unsigned char)*utf8 <= 0x7f ) - { - // small optimization - len = 1; - correct = true; - z = static_cast(*utf8); - } - else - { - len = UTF8ToInt(utf8, utf8_len, z, correct); // the len will be different from zero - } - - if( !correct ) - { - if( mode == 1 ) - res += 0xFFFD; // U+FFFD "replacement character" - - was_error = true; - } - else - { - IntToWide(z, res); - } - - utf8 += len; - utf8_len -= len; - } - -return !was_error; -} - - - -/*! - this function converts an utf8 string into wide string (std::wstring) - - input: - utf8 - an input utf8 null terminated string - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - res - an output wide string - - the function returns false if there were some errors when converting -*/ -bool UTF8ToWide(const char * utf8, std::wstring & res, bool clear, int mode) -{ -size_t utf8_len = 0; - - while( utf8[utf8_len] != 0 ) - utf8_len += 1; - -return UTF8ToWide(utf8, utf8_len, res, clear, mode); -} - - - -/*! - this function converts an utf8 string into wide string (std::wstring) - - input: - utf8 - an input utf8 string - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - res - an output wide string - - the function returns false if there were some errors when converting -*/ -bool UTF8ToWide(const std::string & utf8, std::wstring & res, bool clear, int mode) -{ - return UTF8ToWide(utf8.c_str(), utf8.size(), res, clear, mode); -} - - - -/*! - this function converts an utf8 stream into wide string (std::wstring) - - input: - utf8 - an input utf8 stream - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - res - an output wide string - - the function returns false if there were some errors when converting -*/ -bool UTF8ToWide(std::istream & utf8, std::wstring & res, bool clear, int mode) -{ -int z; -bool correct, was_error = false; - - if( clear ) - res.clear(); - - while( UTF8ToInt(utf8, z, correct) > 0 ) - { - if( !correct ) - { - if( mode == 1 ) - res += 0xFFFD; // U+FFFD "replacement character" - - was_error = true; - } - else - { - IntToWide(z, res); - } - } - -return !was_error; -} - - - - -/*! - this function converts one wide character into UTF-8 sequence - - input: - z - wide character - - output: - utf8 - a buffer for the output sequence - utf8_len - the size of the buffer - - the function returns how many characters have been written to the utf8, - zero means the utf8 buffer is too small or 'z' is an incorrect unicode character -*/ -size_t IntToUTF8(int z, char * utf8, size_t utf8_max_len) -{ -char buf[10]; -int i = 0; -int mask = 0x3f; // 6 first bits set - - if( utf8_max_len==0 || !UTF8_CheckRange(z) ) - return 0; - - if( z <= 0x7f ) - { - utf8[0] = static_cast(z); - return 1; - } - - do - { - buf[i] = 0x80 | (z & 0x3f); - i += 1; - z >>= 6; - mask >>= 1; - } - while( (z & (~mask)) != 0 ); - - unsigned int first = -1; - first <<= (7 - i); - first |= (z & mask); - - if( size_t(i+1) > utf8_max_len ) - return 0; - - utf8[0] = static_cast(first); - - int a = 1; - for(--i; i>=0 ; --i, ++a) - utf8[a] = buf[i]; - -return a; -} - - - -/*! - this function converts one wide character into UTF-8 string - - input: - z - wide character - - output: - utf8 - a UTF-8 string for the output sequence (the string is not cleared) - - the function returns how many characters have been written to the utf8 string, - zero means that 'z' is an incorrect unicode character -*/ -size_t IntToUTF8(int z, std::string & utf8, bool clear) -{ -char buf[10]; - - if( clear ) - utf8.clear(); - - size_t len = IntToUTF8(z, buf, sizeof(buf)/sizeof(char)); - size_t i; - - for(i=0 ; i(*wide_string); - correct = true; - - if( sizeof(wchar_t) == 2 && (z>=0xD800 && z<=0xDFFF) ) - { - if( z>=0xD800 && z<=0xDBFF && string_len>1 ) - { - int z2 = *(wide_string+1); - - if( z2>=0xDC00 && z2<=0xDFFF ) - { - z = 0x10000 + (((z & 0x3FF) << 10) | (z2 & 0x3FF)); - return 2; - } - else - { - correct = false; - return 2; - } - } - else - { - correct = false; - return 1; - } - } - else - { - return 1; - } -} - - - -/* - an auxiliary function for converting from wide characters to UTF-8 - converting a wide character into one int - - returns how many wide characters were used - if wide_string has at least one character then the return value is always greater than zero too -*/ -static size_t WideToInt(const wchar_t * wide_string, int & z, bool & correct) -{ -size_t min_str_len = 1; - - if( *wide_string == 0 ) - { - z = 0; - correct = false; - return 0; - } - - if( *(wide_string+1) != 0 ) - min_str_len = 2; - -return WideToInt(wide_string, min_str_len, z, correct); -} - - - - -/*! - an auxiliary function for converting from wide characters to UTF-8 - - returns how many wide characters were used - if string_len is greater than 0 then the return value is always greater than zero too -*/ -static size_t WideOneToUTF8(const wchar_t * wide_string, size_t string_len, std::string & utf8, bool & was_error, int mode) -{ -int z; -bool correct; -size_t chars; - - chars = WideToInt(wide_string, string_len, z, correct); - - if( correct ) - correct = IntToUTF8(z, utf8, false) != 0; - - if( !correct ) - { - if( mode == 1 ) - IntToUTF8(0xFFFD, utf8, false); // U+FFFD "replacement character" - - was_error = true; - } - -return chars; -} - - - -/*! - an auxiliary function for converting from wide characters to UTF-8 - - returns how many wide characters were used - if wide_string has at least one character then the return value is always greater than zero too -*/ -static size_t WideOneToUTF8(const wchar_t * wide_string, std::string & utf8, bool & was_error, int mode) -{ -int z; -bool correct; -size_t chars; - - chars = WideToInt(wide_string, z, correct); - - if( correct ) - correct = IntToUTF8(z, utf8, false) != 0; - - if( !correct ) - { - if( mode == 1 ) - IntToUTF8(0xFFFD, utf8, false); // U+FFFD "replacement character" - - was_error = true; - } - -return chars; -} - - - -/*! - an auxiliary function for converting from wide characters to UTF-8 - - returns how many wide characters were used - if string_len is greater than 0 then the return value is always greater than zero too -*/ -static size_t WideOneToUTF8(const wchar_t * wide_string, size_t string_len, std::ostream & utf8, bool & was_error, int mode) -{ -int z; -bool correct; -size_t chars; - - chars = WideToInt(wide_string, string_len, z, correct); - - if( correct ) - correct = IntToUTF8(z, utf8) != 0; - - if( !correct ) - { - if( mode == 1 ) - IntToUTF8(0xFFFD, utf8); // U+FFFD "replacement character" - - was_error = true; - } - -return chars; -} - - - -/*! - an auxiliary function for converting from wide characters to UTF-8 -*/ -static size_t WideOneToUTF8(const wchar_t * wide_string, std::ostream & utf8, bool & was_error, int mode) -{ -size_t min_str_len = 1; - - if( *wide_string == 0 ) - return 0; - - if( *(wide_string+1) != 0 ) - min_str_len = 2; - -return WideOneToUTF8(wide_string, min_str_len, utf8, was_error, mode); -} - - - - -/*! - this function converts a wide string into UTF-8 string - - input: - wide_string - a wide string for converting - string_len - the size of the string - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - utf8 - a UTF-8 string for the output sequence (the string is not cleared) - - this function returns false if there were some errors when converting -*/ -bool WideToUTF8(const wchar_t * wide_string, size_t string_len, std::string & utf8, bool clear, int mode) -{ -bool was_error = false; -size_t chars; - - if( clear ) - utf8.clear(); - - while( string_len > 0 ) - { - chars = WideOneToUTF8(wide_string, string_len, utf8, was_error, mode); - wide_string += chars; - string_len -= chars; - } - -return !was_error; -} - - - -/*! - this function converts a wide string into UTF-8 string - - input: - wide_string - a null terminated wide string for converting - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - utf8 - a UTF-8 string for the output sequence (the string is not cleared) - - this function returns false if there were some errors when converting -*/ -bool WideToUTF8(const wchar_t * wide_string, std::string & utf8, bool clear, int mode) -{ -bool was_error = false; - - if( clear ) - utf8.clear(); - - while( *wide_string ) - wide_string += WideOneToUTF8(wide_string, utf8, was_error, mode); - -return !was_error; -} - - - -/*! - this function converts a wide string (std::wstring) into UTF-8 string - - input: - wide_string - a wide string for converting - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - utf8 - a UTF-8 string for the output sequence (the string is not cleared) - - this function returns false if there were some errors when converting -*/ -bool WideToUTF8(const std::wstring & wide_string, std::string & utf8, bool clear, int mode) -{ - return WideToUTF8(wide_string.c_str(), wide_string.size(), utf8, clear, mode); -} - - - -/*! - this function converts a wide string into UTF-8 stream - - input: - wide_string - a wide string for converting - string_len - size of the string - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - utf8 - a UTF-8 stream for the output sequence - - this function returns false if there were some errors when converting -*/ -bool WideToUTF8(const wchar_t * wide_string, size_t string_len, std::ostream & utf8, int mode) -{ -bool was_error = false; -size_t chars; - - while( string_len > 0 ) - { - chars = WideOneToUTF8(wide_string, string_len, utf8, was_error, mode); - wide_string += chars; - string_len -= chars; - } - -return !was_error; -} - - -/*! - this function converts a wide string into UTF-8 stream - - input: - wide_string - a null terminated wide string for converting - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - utf8 - a UTF-8 stream for the output sequence - - this function returns false if there were some errors when converting -*/ -bool WideToUTF8(const wchar_t * wide_string, std::ostream & utf8, int mode) -{ -bool was_error = false; - - while( *wide_string ) - wide_string += WideOneToUTF8(wide_string, utf8, was_error, mode); - -return !was_error; -} - - - -/*! - this function converts a wide string (std::wstring) into UTF-8 stream - - input: - wide_string - a wide string for converting - mode - what to do with errors when converting - 0: skip an invalid character - 1: put U+FFFD "replacement character" istead of the invalid character (default) - - output: - utf8 - a UTF-8 stream for the output sequence - - this function returns false if there were some errors when converting -*/ -bool WideToUTF8(const std::wstring & wide_string, std::ostream & utf8, int mode) -{ - return WideToUTF8(wide_string.c_str(), wide_string.size(), utf8, mode); -} - - - - -} // namespace Ezc - - -