src/config/reader.cpp

   1 /*
   2  *  Copyright (C) 2008 Patrik Gornicz, Gornicz_P (at) hotmail (dot) com.
   3  *
   4  *  This program is free software: you can redistribute it and/or modify
   5  *  it under the terms of the GNU General Public License as published by
   6  *  the Free Software Foundation, either version 3 of the License, or
   7  *  (at your option) any later version.
   8  *
   9  *  This program is distributed in the hope that it will be useful,
  10  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *  GNU General Public License for more details.
  13  *
  14  *  You should have received a copy of the GNU General Public License
  15  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "reader.h"
  19 #include "../debug.h"
  20
  21 #include <iostream>
  22 #include <fstream>
  23 #include <string>
  24
  25 #include "keys.h"
  26
  27 using std::ifstream;
  28 using std::string;
  29
  30 typedef std::map<string, SDLKey, comparestrings> kMap;
  31 kMap keyMap;
  32
  33 /// ***** Private Method Headers *****
  34
  35 void processLine(const string& str);
  36 bool extractLine(const string& str, string* name, string* value);
  37 void createKeyMap();
  38
  39 /// ***** Private Variables *****
  40
  41 const char* configDir = "configs/";
  42 const char* testFile = "test2.cfg";
  43
  44 /// ***** Public Methods *****
  45
  46 void readConfigs()
  47 {
  48     char fileName[64];
  49
  50     createKeyMap();
  51
  52     strcpy(fileName, configDir);
  53     strcat(fileName, testFile);
  54
  55     ifstream file(fileName);
  56
  57     if( !file.is_open() )
  58     {
  59         cerr << "Unable to open file " << fileName << "." << endl;
  60         exit(1);
  61     }
  62
  63     while(true)
  64     {
  65         string line;
  66         getline(file, line);
  67
  68         if(file.eof())
  69             break;
  70
  71         processLine(line);
  72     }
  73
  74     file.close();
  75 }
  76
  77 /// ***** Private Methods *****
  78
  79 void processLine(const string& str)
  80 {
  81     string name;
  82     string value;
  83
  84     bool extracted;
  85
  86     extracted = extractLine(str, &name, &value);
  87
  88     if(extracted)
  89     {
  90         SDLKey key = keyMap[value];
  91
  92         if(0 != key)
  93         {
  94             *(key::sdlMap[name]) = key;
  95         }
  96         cout << name << endl;
  97         cout << value << endl;
  98         cout << key << endl;
  99     }
 100 }
 101
 102 /*
 103  * Return true iff the string str, had a name and value extracted and saved in
 104  * name and value. Otherwise return false and leave name and value alone.
 105  */
 106 bool extractLine(const string& str, string* name, string* value)
 107 {
 108     /*
 109      * state    := 0 if eating leading name whitespace
 110      *          := 1 if saving name
 111      *          := 2 if eating trailing name whitespace
 112      *          := 3 if eating leading value whitespace
 113      *          := 4 if saving value
 114      *          := 5 if all is done and well
 115      */
 116     int state = 0;
 117
 118     int char_pos = 0;
 119
 120     int name_start;
 121     int name_end;
 122
 123     int value_start;
 124     int value_end;
 125
 126     const char* c_str = str.c_str();
 127
 128     while(true)
 129     {
 130         if(c_str[char_pos] == 0 && state != 4)
 131             return false;
 132
 133         switch (state)
 134         {
 135             case 0:
 136                 if(c_str[char_pos] != ' '
 137                 && c_str[char_pos] != '\t')
 138                 {
 139                     state++;
 140                     name_start = char_pos;
 141                 }
 142                 break;
 143             case 1:
 144                 if(c_str[char_pos] == ' '
 145                 || c_str[char_pos] == '\t'
 146                 || c_str[char_pos] == '=')
 147                 {
 148                     state++;
 149                     name_end = char_pos;
 150                 }
 151
 152                 if(c_str[char_pos] == '=')
 153                     char_pos--; // decrement to stay on this char
 154                 break;
 155             case 2:
 156                 if(c_str[char_pos] != ' '
 157                 && c_str[char_pos] != '\t'
 158                 && c_str[char_pos] != '=')
 159                 {
 160                     return false;
 161                 }
 162
 163                 if(c_str[char_pos] == '=')
 164                 {
 165                     state++;
 166                 }
 167                 break;
 168             case 3:
 169                 if(c_str[char_pos] != ' '
 170                 && c_str[char_pos] != '\t')
 171                 {
 172                     state++;
 173                     value_start = char_pos;
 174                 }
 175                 break;
 176             case 4:
 177                 if(c_str[char_pos] == ' '
 178                 || c_str[char_pos] == '\t'
 179                 || c_str[char_pos] == 0)
 180                 {
 181                     state++;
 182                     value_end = char_pos;
 183                 }
 184                 break;
 185         }
 186
 187         if(state == 5)
 188             break;
 189
 190         char_pos++;
 191     }
 192
 193     name->clear();
 194     value->clear();
 195
 196     name->replace   (0, 0, c_str, name_start,   name_end  - name_start);
 197     value->replace  (0, 0, c_str, value_start,  value_end - value_start);
 198
 199     return true;
 200 }
 201
 202 void createKeyMap()
 203 {
 204     // add all the letters
 205     for (int i = 'A'; i <= 'Z'; i++)   // uppercase
 206         keyMap["" + (char)i] = (SDLKey)i;
 207     for (int i = 'a'; i <= 'z'; i++)   // lowercase
 208         keyMap["" + (char)i] = (SDLKey)i;
 209
 210     // add all the numbers
 211     for (int i = '0'; i <= '9'; i++)
 212         keyMap["" + (char)i] = (SDLKey)i;
 213
 214     keyMap["k"] = (SDLKey)'k';
 215
 216     /*
 217     // add the function keys
 218     int F1 = (int)Key.F1;
 219     for (int i = F1; i <= (int)Key.F15; i++)
 220     {
 221         keyMap.Add("F" + (i - F1 + 1), (Key)i);
 222         keyMap.Add("f" + (i - F1 + 1), (Key)i);
 223     }
 224     */
 225
 226     keyMap["LCtrl"]         = SDLK_LCTRL;
 227     keyMap["LeftControl"]   = SDLK_LCTRL;
 228     keyMap["LAlt"]          = SDLK_LALT;
 229     keyMap["LeftAlt"]       = SDLK_LALT;
 230     keyMap["LShift"]        = SDLK_LSHIFT;
 231     keyMap["LeftShift"]     = SDLK_LSHIFT;
 232     keyMap["LWin"]          = SDLK_LSUPER;
 233     keyMap["LeftWindows"]   = SDLK_LSUPER;
 234     keyMap["LeftMeta"]      = SDLK_LMETA;
 235     keyMap["LMeta"]         = SDLK_LMETA;
 236
 237     keyMap["RCtrl"]         = SDLK_RCTRL;
 238     keyMap["RightControl"]  = SDLK_RCTRL;
 239     keyMap["RAlt"]          = SDLK_RALT;
 240     keyMap["RightAlt"]      = SDLK_RALT;
 241     keyMap["RShift"]        = SDLK_RSHIFT;
 242     keyMap["RightShift"]    = SDLK_RSHIFT;
 243     keyMap["RWin"]          = SDLK_RSUPER;
 244     keyMap["RightWindows"]  = SDLK_RSUPER;
 245     keyMap["RightMeta"]     = SDLK_RMETA;
 246     keyMap["RMeta"]         = SDLK_RMETA;
 247
 248     keyMap["Esc"]           = SDLK_ESCAPE;
 249     keyMap["Escape"]        = SDLK_ESCAPE;
 250
 251     keyMap["Return"]        = SDLK_RETURN;
 252     keyMap["Enter"]         = SDLK_RETURN;
 253
 254     keyMap["Insert"]        = SDLK_INSERT;
 255     keyMap["Home"]          = SDLK_HOME;
 256     keyMap["Delete"]        = SDLK_DELETE;
 257     keyMap["End"]           = SDLK_END;
 258     keyMap["PageUp"]        = SDLK_PAGEUP;
 259     keyMap["PageDown"]      = SDLK_PAGEDOWN;
 260
 261     keyMap["Minus"]         = SDLK_MINUS;
 262     keyMap["Equal"]         = SDLK_EQUALS;
 263     keyMap["Equals"]        = SDLK_EQUALS;
 264     keyMap["LeftBracket"]   = SDLK_LEFTBRACKET;
 265     keyMap["LBracket"]      = SDLK_LEFTBRACKET;
 266     keyMap["RightBracket"]  = SDLK_RIGHTBRACKET;
 267     keyMap["RBracket"]      = SDLK_RIGHTBRACKET;
 268     keyMap["Backslash"]     = SDLK_BACKSLASH;
 269     keyMap["Slash"]         = SDLK_SLASH;
 270     keyMap["Semicolon"]     = SDLK_SEMICOLON;
 271     keyMap["Semi"]          = SDLK_SEMICOLON;
 272     keyMap["Quote"]         = SDLK_QUOTE;
 273     keyMap["Comma"]         = SDLK_COMMA;
 274     keyMap["Period"]        = SDLK_PERIOD;
 275     keyMap["Space"]         = SDLK_SPACE;
 276     keyMap["BSpace"]        = SDLK_BACKSPACE;
 277     keyMap["Backspace"]     = SDLK_BACKSPACE;
 278     keyMap["BackSpace"]     = SDLK_BACKSPACE;
 279
 280     keyMap["Tab"]           = SDLK_TAB;
 281     keyMap["BackQuote"]     = SDLK_BACKQUOTE;
 282     keyMap["BQuote"]        = SDLK_BACKQUOTE;
 283     keyMap["CapsLock"]      = SDLK_CAPSLOCK;
 284     keyMap["Caps"]          = SDLK_CAPSLOCK;
 285
 286     keyMap["Up"]            = SDLK_UP;
 287     keyMap["Down"]          = SDLK_DOWN;
 288     keyMap["Left"]          = SDLK_LEFT;
 289     keyMap["Right"]         = SDLK_RIGHT;
 290
 291     cout << "done" << endl;
 292     cout << keyMap["k"] << endl;
 293 }