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 using std::cerr;
  23 using std::cout;
  24 using std::endl;
  25
  26 #include <fstream>
  27 #include <string>
  28
  29 #include "keys.h"
  30
  31 using std::ifstream;
  32 using std::string;
  33
  34 typedef std::map<string, SDLKey> kMap;
  35 kMap keyMap;
  36
  37 /// ***** Private Method Headers *****
  38
  39 void processLine(const string& str);
  40 bool extractLine(const string& str, string* name, string* value);
  41 void createKeyMap();
  42
  43 /// ***** Private Variables *****
  44
  45 const char* configDir = "configs/";
  46 const char* testFile = "keys.cfg";
  47
  48 /// ***** Public Methods *****
  49
  50 void readConfigs()
  51 {
  52     char fileName[64];
  53
  54     createKeyMap();
  55
  56     strcpy(fileName, configDir);
  57     strcat(fileName, testFile);
  58
  59     ifstream file(fileName);
  60
  61     if( !file.is_open() )
  62     {
  63         cerr << "Unable to open file " << fileName << "." << endl;
  64         exit(1);
  65     }
  66
  67     while(true)
  68     {
  69         string line;
  70         getline(file, line);
  71
  72         if(file.eof())
  73             break;
  74
  75         processLine(line);
  76     }
  77
  78     file.close();
  79 }
  80
  81 /// ***** Private Methods *****
  82
  83 void processLine(const string& str)
  84 {
  85     string name;
  86     string value;
  87
  88     bool extracted;
  89
  90     extracted = extractLine(str, &name, &value);
  91
  92     if(extracted)
  93     {
  94         SDLKey key = keyMap[value];
  95
  96         if(0 != key)
  97         {
  98             *(key::sdlMap[name]) = key;
  99         }
 100         cout << name << endl;
 101         cout << value << endl;
 102         cout << key << endl;
 103     }
 104 }
 105
 106 /*
 107  * Return true iff the string str, had a name and value extracted and saved in
 108  * name and value. Otherwise return false and leave name and value alone.
 109  */
 110 bool extractLine(const string& str, string* name, string* value)
 111 {
 112     /*
 113      * state    := 0 if eating leading name whitespace
 114      *          := 1 if saving name
 115      *          := 2 if eating trailing name whitespace
 116      *          := 3 if eating leading value whitespace
 117      *          := 4 if saving value
 118      *          := 5 if all is done and well
 119      */
 120     int state = 0;
 121
 122     int char_pos = 0;
 123
 124     int name_start;
 125     int name_end;
 126
 127     int value_start;
 128     int value_end;
 129
 130     const char* c_str = str.c_str();
 131
 132     while(true)
 133     {
 134         if(c_str[char_pos] == 0 && state != 4)
 135             return false;
 136
 137         switch (state)
 138         {
 139             case 0:
 140                 if(c_str[char_pos] != ' '
 141                 && c_str[char_pos] != '\t')
 142                 {
 143                     state++;
 144                     name_start = char_pos;
 145                 }
 146                 break;
 147             case 1:
 148                 if(c_str[char_pos] == ' '
 149                 || c_str[char_pos] == '\t'
 150                 || c_str[char_pos] == '=')
 151                 {
 152                     state++;
 153                     name_end = char_pos;
 154                 }
 155
 156                 if(c_str[char_pos] == '=')
 157                     char_pos--; // decrement to stay on this char
 158                 break;
 159             case 2:
 160                 if(c_str[char_pos] != ' '
 161                 && c_str[char_pos] != '\t'
 162                 && c_str[char_pos] != '=')
 163                 {
 164                     return false;
 165                 }
 166
 167                 if(c_str[char_pos] == '=')
 168                 {
 169                     state++;
 170                 }
 171                 break;
 172             case 3:
 173                 if(c_str[char_pos] != ' '
 174                 && c_str[char_pos] != '\t')
 175                 {
 176                     state++;
 177                     value_start = char_pos;
 178                 }
 179                 break;
 180             case 4:
 181                 if(c_str[char_pos] == ' '
 182                 || c_str[char_pos] == '\t'
 183                 || c_str[char_pos] == 0)
 184                 {
 185                     state++;
 186                     value_end = char_pos;
 187                 }
 188                 break;
 189         }
 190
 191         if(state == 5)
 192             break;
 193
 194         char_pos++;
 195     }
 196
 197     name->clear();
 198     value->clear();
 199
 200     name->replace   (0, 0, c_str, name_start,   name_end  - name_start);
 201     value->replace  (0, 0, c_str, value_start,  value_end - value_start);
 202
 203     return true;
 204 }
 205
 206 void createKeyMap()
 207 {
 208     char buf[2] = {0,0};
 209
 210     // add all the letters
 211     for (int i = 'A'; i <= 'Z'; i++)   // uppercase
 212     {
 213         buf[0] = (char)i;
 214         keyMap[buf] = (SDLKey)i;
 215     }
 216     for (int i = 'a'; i <= 'z'; i++)   // lowercase
 217     {
 218         buf[0] = (char)i;
 219         keyMap[buf] = (SDLKey)i;
 220     }
 221
 222     // add all the numbers
 223     for (int i = '0'; i <= '9'; i++)
 224     {
 225         buf[0] = (char)i;
 226         keyMap[buf] = (SDLKey)i;
 227     }
 228
 229     /*
 230     // add the function keys
 231     int F1 = (int)Key.F1;
 232     for (int i = F1; i <= (int)Key.F15; i++)
 233     {
 234         keyMap.Add("F" + (i - F1 + 1), (Key)i);
 235         keyMap.Add("f" + (i - F1 + 1), (Key)i);
 236     }
 237     */
 238
 239     keyMap["LCtrl"]         = SDLK_LCTRL;
 240     keyMap["LeftControl"]   = SDLK_LCTRL;
 241     keyMap["LAlt"]          = SDLK_LALT;
 242     keyMap["LeftAlt"]       = SDLK_LALT;
 243     keyMap["LShift"]        = SDLK_LSHIFT;
 244     keyMap["LeftShift"]     = SDLK_LSHIFT;
 245     keyMap["LWin"]          = SDLK_LSUPER;
 246     keyMap["LeftWindows"]   = SDLK_LSUPER;
 247     keyMap["LeftMeta"]      = SDLK_LMETA;
 248     keyMap["LMeta"]         = SDLK_LMETA;
 249
 250     keyMap["RCtrl"]         = SDLK_RCTRL;
 251     keyMap["RightControl"]  = SDLK_RCTRL;
 252     keyMap["RAlt"]          = SDLK_RALT;
 253     keyMap["RightAlt"]      = SDLK_RALT;
 254     keyMap["RShift"]        = SDLK_RSHIFT;
 255     keyMap["RightShift"]    = SDLK_RSHIFT;
 256     keyMap["RWin"]          = SDLK_RSUPER;
 257     keyMap["RightWindows"]  = SDLK_RSUPER;
 258     keyMap["RightMeta"]     = SDLK_RMETA;
 259     keyMap["RMeta"]         = SDLK_RMETA;
 260
 261     keyMap["Esc"]           = SDLK_ESCAPE;
 262     keyMap["Escape"]        = SDLK_ESCAPE;
 263
 264     keyMap["Return"]        = SDLK_RETURN;
 265     keyMap["Enter"]         = SDLK_RETURN;
 266
 267     keyMap["Insert"]        = SDLK_INSERT;
 268     keyMap["Home"]          = SDLK_HOME;
 269     keyMap["Delete"]        = SDLK_DELETE;
 270     keyMap["End"]           = SDLK_END;
 271     keyMap["PageUp"]        = SDLK_PAGEUP;
 272     keyMap["PageDown"]      = SDLK_PAGEDOWN;
 273
 274     keyMap["Minus"]         = SDLK_MINUS;
 275     keyMap["Equal"]         = SDLK_EQUALS;
 276     keyMap["Equals"]        = SDLK_EQUALS;
 277     keyMap["LeftBracket"]   = SDLK_LEFTBRACKET;
 278     keyMap["LBracket"]      = SDLK_LEFTBRACKET;
 279     keyMap["RightBracket"]  = SDLK_RIGHTBRACKET;
 280     keyMap["RBracket"]      = SDLK_RIGHTBRACKET;
 281     keyMap["Backslash"]     = SDLK_BACKSLASH;
 282     keyMap["Slash"]         = SDLK_SLASH;
 283     keyMap["Semicolon"]     = SDLK_SEMICOLON;
 284     keyMap["Semi"]          = SDLK_SEMICOLON;
 285     keyMap["Quote"]         = SDLK_QUOTE;
 286     keyMap["Comma"]         = SDLK_COMMA;
 287     keyMap["Period"]        = SDLK_PERIOD;
 288     keyMap["Space"]         = SDLK_SPACE;
 289     keyMap["BSpace"]        = SDLK_BACKSPACE;
 290     keyMap["Backspace"]     = SDLK_BACKSPACE;
 291     keyMap["BackSpace"]     = SDLK_BACKSPACE;
 292
 293     keyMap["Tab"]           = SDLK_TAB;
 294     keyMap["BackQuote"]     = SDLK_BACKQUOTE;
 295     keyMap["BQuote"]        = SDLK_BACKQUOTE;
 296     keyMap["CapsLock"]      = SDLK_CAPSLOCK;
 297     keyMap["Caps"]          = SDLK_CAPSLOCK;
 298
 299     keyMap["Up"]            = SDLK_UP;
 300     keyMap["Down"]          = SDLK_DOWN;
 301     keyMap["Left"]          = SDLK_LEFT;
 302     keyMap["Right"]         = SDLK_RIGHT;
 303 }