绘制关键字高亮的字符串

    const char *word = pszLine;
    char word_buffer[EI_MAX_CHAR_NUM];
    int  addr = 0;
    bool last_word_is_space = false;
    while(1){
        if(word[0] != ' ' && word[0] != '\t' && word[0] != 0){
            if(last_word_is_space){
                word_buffer[addr] = 0;
                addr = 0;
                set_text_color(EI_MAIN_WINDOW_TEXT_COLOR);
                draw_text(word_buffer);
            }
            last_word_is_space = false;
        }else{
            if(!last_word_is_space){
                word_buffer[addr] = 0;
                addr = 0;
                bool is_keyword = false;
                for(int i = 0; i < KEYWORD_TABLE_SIZE; ++i){
                    if(strcmp(word_buffer,keyword_table[i].name)==0){
                        is_keyword = true;
                        set_text_color(keyword_table[i].color);
                        break;
                    }
                }
                if(!is_keyword)
                    set_text_color(EI_MAIN_WINDOW_TEXT_COLOR);
                draw_text(word_buffer);
            }
            if(word[0] == 0)
                break;
            last_word_is_space = true;
        }
        word_buffer[addr] = word[0];
        ++addr;
        ++word;
    }
    draw_text("\r\n");