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C++:文本处理不正确,第一个\r\n未解析

android-ndk string c++

k0ala Xing · 技术社区 · 1 年前

我正在将一个开源游戏客户端从PC移植到Android,但在处理NPC聊天时,有些行没有正确解析:

来自服务器的原始文本:

formatted_text_ = "Now...ask me any questions you may have on traveling!!\r\n#L0##bHow do I move?#l\r\n#L1#How do I take down the monsters?#l\r\n#L2#How can I pick up an item?#l\r\n#L3#What happens when I die?#l\r\n#L4#When can I choose a job?#l\r\n#L5#Tell me more about this island!#l\r\n#L6#What should I do to become a Warrior?#l\r\n#L7#What should I do to become a Bowman?#l\r\n#L8#What should I do to become a Magician?#l\r\n#L9#What should I do to become a Thief?#l\r\n#L10#How do I raise the character stats? (S)#l\r\n#L11#How do I check the items that I just picked up?#l\r\n#L12#How do I put on an item?#l\r\n#L13#How do I check out the items that I'm wearing?#l\r\n#L14#What are skills? (K)#l\r\n#L15#How do I get to Victoria Island?#l\r\n#L16#What are mesos?#l#k"

第二行 “我该如何移动” 未作为新行开始,以结尾的其他行\r\n将通过跟随新行进行正常分析。

如何处理和:

            switch (text[first]) {
                case '\\':
                    if (first + 1 < last) {
                        switch (text[first + 1]) {
                            case 'n':
                                linebreak = true;
                                break;
                            case 'r':
                                linebreak = ax_ > 0;
                                break;
                        }

                        skip++;
                    }

                    skip++;
                    break;

当换行符为true或长度超过最大宽度时,应添加新行:

        bool newword = skip > 0;
        bool newline = linebreak || ax_ + wordwidth > max_width_;

        if (newword || newline) {
            add_word(prev, first, last_font, last_color);
        }

        if (newline) {
            add_line();

            endy_ = ay_;
            ax_ = 0;
            ay_ += font_.linespace();

            if (!lines_.empty()) {
                ay_ -= line_adj_;
            }
        }

如何处理formatted_text_:

https://github.com/speedyHKjournalist/OpenMapleClient/blob/521af535bb65fb231296d02f1d19a6f38e77673d/app/src/main/cpp/src/IO/UITypes/UINpcTalk.cpp#L141

https://github.com/speedyHKjournalist/OpenMapleClient/blob/73ddd15f443cc0ab9f796ce362a67d73e5e453ad/app/src/main/cpp/src/Graphics/GraphicsGL.cpp#L617

https://github.com/speedyHKjournalist/OpenMapleClient/blob/73ddd15f443cc0ab9f796ce362a67d73e5e453ad/app/src/main/cpp/src/Graphics/GraphicsGL.cpp#L657

1 回复 | 直到 1 年前

selbie 1 年前

那些 \r\n 序列是两个字节。 \r 是回车。和 \n 是换行字符。Windows偏好 \\r\n 用于行尾。Unix和其他任何地方(包括Android)只喜欢 n 用于行尾。

最简单的事情就是请客 r , n 和 \\r\n 作为有效的行尾标记。因此,让我们将格式化的字符串标准化,使\n成为实际的行尾标记:

    std::string s = formatted_text_;
    std::string t;

    for (size_t i = 0; i < s.size(); i++) {
        if (s[i] == '\r') {
            t += '\n';
            if ((i + 1 < s.size()) && (s[i + 1] == '\n')) {
                i++;
            }
        }
        else {
            t += s[i];
        }
    }

结果是 t 现在是以下形式的字符串:

"Now...ask me any questions you may have on traveling!!\n#L0##bHow do I move?#l\n#L1#How do I take down the monsters?#l\n#L2#How can I pick up an item?#l\n#L3#What happens when I die?#l\n#L4#When can I choose a job?#l\n..."

由于我们现在有一个分隔符来指示行的末尾,我们可以使用 getline 以解析为行列表。

    std::istringstream iss(t);
    std::string line;
    while (std::getline(iss, line, '\n')) {
        lines.push_back(line);
    }

lines 是字符串的数组(矢量),如下所示:

#L0##bHow do I move?#l
#L1#How do I take down the monsters?#l
#L2#How can I pick up an item?#l
#L3#What happens when I die?#l
#L4#When can I choose a job?#l
#L5#Tell me more about this island!#l
#L6#What should I do to become a Warrior?#l
#L7#What should I do to become a Bowman?#l
#L8#What should I do to become a Magician?#l
#L9#What should I do to become a Thief?#l
#L10#How do I raise the character stats? (S)#l
#L11#How do I check the items that I just picked up?#l
#L12#How do I put on an item?#l
#L13#How do I check out the items that I'm wearing?#l
#L14#What are skills? (K)#l
#L15#How do I get to Victoria Island?#l
#L16#What are mesos?#l#k

例如 line[2] 等于 #L2#How can I pick up an item?#l 。的那些格式说明符 #L2 和 #l 为了你的比赛——我把它留给你练习。

笔记 #include <string> #include <vector> and #include <sstream> 以便上述代码工作。