From: Ingo Ruhnke Date: Fri, 20 Nov 2009 16:06:13 +0000 (+0000) Subject: Moved UTF8Iterator to its own file X-Git-Url: https://git.verplant.org/?a=commitdiff_plain;h=a28c61d6f70fbc57733fce3b4e9c2f6c1d98ccf3;p=supertux.git Moved UTF8Iterator to its own file SVN-Revision: 6068 --- diff --git a/src/util/utf8_iterator.cpp b/src/util/utf8_iterator.cpp new file mode 100644 index 000000000..33b061fa9 --- /dev/null +++ b/src/util/utf8_iterator.cpp @@ -0,0 +1,127 @@ +// SuperTux +// Copyright (C) 2009 Ingo Ruhnke +// +// 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 3 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, see . + +#include "util/utf8_iterator.hpp" + +#include + +#include "util/log.hpp" + +namespace { + +bool has_multibyte_mark(unsigned char c); +uint32_t decode_utf8(const std::string& text, size_t& p); +std::string encode_utf8(uint32_t code); + +/** + * returns true if this byte matches a bitmask of 10xx.xxxx, i.e. it is the 2nd, 3rd or 4th byte of a multibyte utf8 string + */ +bool has_multibyte_mark(unsigned char c) { + return ((c & 0300) == 0200); +} + +/** + * gets unicode character at byte position @a p of UTF-8 encoded @a + * text, then advances @a p to the next character. + * + * @throws std::runtime_error if decoding fails. + * See unicode standard section 3.10 table 3-5 and 3-6 for details. + */ +uint32_t decode_utf8(const std::string& text, size_t& p) +{ + uint32_t c1 = (unsigned char) text[p+0]; + + if (has_multibyte_mark(c1)) std::runtime_error("Malformed utf-8 sequence"); + + if ((c1 & 0200) == 0000) { + // 0xxx.xxxx: 1 byte sequence + p+=1; + return c1; + } + else if ((c1 & 0340) == 0300) { + // 110x.xxxx: 2 byte sequence + if(p+1 >= text.size()) throw std::range_error("Malformed utf-8 sequence"); + uint32_t c2 = (unsigned char) text[p+1]; + if (!has_multibyte_mark(c2)) throw std::runtime_error("Malformed utf-8 sequence"); + p+=2; + return (c1 & 0037) << 6 | (c2 & 0077); + } + else if ((c1 & 0360) == 0340) { + // 1110.xxxx: 3 byte sequence + if(p+2 >= text.size()) throw std::range_error("Malformed utf-8 sequence"); + uint32_t c2 = (unsigned char) text[p+1]; + uint32_t c3 = (unsigned char) text[p+2]; + if (!has_multibyte_mark(c2)) throw std::runtime_error("Malformed utf-8 sequence"); + if (!has_multibyte_mark(c3)) throw std::runtime_error("Malformed utf-8 sequence"); + p+=3; + return (c1 & 0017) << 12 | (c2 & 0077) << 6 | (c3 & 0077); + } + else if ((c1 & 0370) == 0360) { + // 1111.0xxx: 4 byte sequence + if(p+3 >= text.size()) throw std::range_error("Malformed utf-8 sequence"); + uint32_t c2 = (unsigned char) text[p+1]; + uint32_t c3 = (unsigned char) text[p+2]; + uint32_t c4 = (unsigned char) text[p+4]; + if (!has_multibyte_mark(c2)) throw std::runtime_error("Malformed utf-8 sequence"); + if (!has_multibyte_mark(c3)) throw std::runtime_error("Malformed utf-8 sequence"); + if (!has_multibyte_mark(c4)) throw std::runtime_error("Malformed utf-8 sequence"); + p+=4; + return (c1 & 0007) << 18 | (c2 & 0077) << 12 | (c3 & 0077) << 6 | (c4 & 0077); + } + throw std::runtime_error("Malformed utf-8 sequence"); +} + +} // namespace + + +UTF8Iterator::UTF8Iterator(const std::string& text_) : + text(text_), + pos(0), + chr() +{ + try { + chr = decode_utf8(text, pos); + } catch (std::exception) { + log_debug << "Malformed utf-8 sequence beginning with " << *((uint32_t*)(text.c_str() + pos)) << " found " << std::endl; + chr = 0; + } +} + + bool +UTF8Iterator::done() const + { + return pos > text.size(); + } + + UTF8Iterator& +UTF8Iterator::operator++() { + try { + chr = decode_utf8(text, pos); + } catch (std::exception) { + log_debug << "Malformed utf-8 sequence beginning with " << *((uint32_t*)(text.c_str() + pos)) << " found " << std::endl; + chr = 0; + ++pos; + } + + return *this; + } + + uint32_t + UTF8Iterator::operator*() const { + return chr; + } + +/* EOF */ diff --git a/src/util/utf8_iterator.hpp b/src/util/utf8_iterator.hpp new file mode 100644 index 000000000..79133c83f --- /dev/null +++ b/src/util/utf8_iterator.hpp @@ -0,0 +1,40 @@ +// SuperTux +// Copyright (C) 2006 Matthias Braun +// Ingo Ruhnke +// +// 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 3 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, see . + +#ifndef HEADER_SUPERTUX_UTIL_UTF8_ITERATOR_HPP +#define HEADER_SUPERTUX_UTIL_UTF8_ITERATOR_HPP + +#include +#include + +class UTF8Iterator +{ +public: + const std::string& text; + std::string::size_type pos; + uint32_t chr; + + UTF8Iterator(const std::string& text_); + + bool done() const; + UTF8Iterator& operator++(); + uint32_t operator*() const; +}; + +#endif + +/* EOF */ diff --git a/src/video/font.cpp b/src/video/font.cpp index 4aac58a64..86e524d5a 100644 --- a/src/video/font.cpp +++ b/src/video/font.cpp @@ -23,63 +23,18 @@ #include #include -#include "physfs/physfs_sdl.hpp" - -#include "util/file_system.hpp" - #include "lisp/list_iterator.hpp" #include "lisp/parser.hpp" +#include "physfs/physfs_sdl.hpp" #include "supertux/screen.hpp" +#include "util/file_system.hpp" #include "util/log.hpp" +#include "util/utf8_iterator.hpp" #include "video/drawing_context.hpp" #include "video/font.hpp" #include "video/renderer.hpp" namespace { -bool has_multibyte_mark(unsigned char c); -uint32_t decode_utf8(const std::string& text, size_t& p); -std::string encode_utf8(uint32_t code); - -struct UTF8Iterator -{ - const std::string& text; - std::string::size_type pos; - uint32_t chr; - - UTF8Iterator(const std::string& text_) : - text(text_), - pos(0), - chr() - { - try { - chr = decode_utf8(text, pos); - } catch (std::exception) { - log_debug << "Malformed utf-8 sequence beginning with " << *((uint32_t*)(text.c_str() + pos)) << " found " << std::endl; - chr = 0; - } - } - - bool done() const - { - return pos > text.size(); - } - - UTF8Iterator& operator++() { - try { - chr = decode_utf8(text, pos); - } catch (std::exception) { - log_debug << "Malformed utf-8 sequence beginning with " << *((uint32_t*)(text.c_str() + pos)) << " found " << std::endl; - chr = 0; - ++pos; - } - - return *this; - } - - uint32_t operator*() const { - return chr; - } -}; bool vline_empty(SDL_Surface* surface, int x, int start_y, int end_y, Uint8 threshold) { @@ -95,6 +50,7 @@ bool vline_empty(SDL_Surface* surface, int x, int start_y, int end_y, Uint8 thre } return true; } + } // namespace Font::Font(GlyphWidth glyph_width_, @@ -471,66 +427,4 @@ Font::draw_chars(Renderer *renderer, bool notshadow, const std::string& text, } } -namespace { - -/** - * returns true if this byte matches a bitmask of 10xx.xxxx, i.e. it is the 2nd, 3rd or 4th byte of a multibyte utf8 string - */ -bool has_multibyte_mark(unsigned char c) { - return ((c & 0300) == 0200); -} - -/** - * gets unicode character at byte position @a p of UTF-8 encoded @a - * text, then advances @a p to the next character. - * - * @throws std::runtime_error if decoding fails. - * See unicode standard section 3.10 table 3-5 and 3-6 for details. - */ -uint32_t decode_utf8(const std::string& text, size_t& p) -{ - uint32_t c1 = (unsigned char) text[p+0]; - - if (has_multibyte_mark(c1)) std::runtime_error("Malformed utf-8 sequence"); - - if ((c1 & 0200) == 0000) { - // 0xxx.xxxx: 1 byte sequence - p+=1; - return c1; - } - else if ((c1 & 0340) == 0300) { - // 110x.xxxx: 2 byte sequence - if(p+1 >= text.size()) throw std::range_error("Malformed utf-8 sequence"); - uint32_t c2 = (unsigned char) text[p+1]; - if (!has_multibyte_mark(c2)) throw std::runtime_error("Malformed utf-8 sequence"); - p+=2; - return (c1 & 0037) << 6 | (c2 & 0077); - } - else if ((c1 & 0360) == 0340) { - // 1110.xxxx: 3 byte sequence - if(p+2 >= text.size()) throw std::range_error("Malformed utf-8 sequence"); - uint32_t c2 = (unsigned char) text[p+1]; - uint32_t c3 = (unsigned char) text[p+2]; - if (!has_multibyte_mark(c2)) throw std::runtime_error("Malformed utf-8 sequence"); - if (!has_multibyte_mark(c3)) throw std::runtime_error("Malformed utf-8 sequence"); - p+=3; - return (c1 & 0017) << 12 | (c2 & 0077) << 6 | (c3 & 0077); - } - else if ((c1 & 0370) == 0360) { - // 1111.0xxx: 4 byte sequence - if(p+3 >= text.size()) throw std::range_error("Malformed utf-8 sequence"); - uint32_t c2 = (unsigned char) text[p+1]; - uint32_t c3 = (unsigned char) text[p+2]; - uint32_t c4 = (unsigned char) text[p+4]; - if (!has_multibyte_mark(c2)) throw std::runtime_error("Malformed utf-8 sequence"); - if (!has_multibyte_mark(c3)) throw std::runtime_error("Malformed utf-8 sequence"); - if (!has_multibyte_mark(c4)) throw std::runtime_error("Malformed utf-8 sequence"); - p+=4; - return (c1 & 0007) << 18 | (c2 & 0077) << 12 | (c3 & 0077) << 6 | (c4 & 0077); - } - throw std::runtime_error("Malformed utf-8 sequence"); -} - -} // namespace - /* EOF */