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     }
 101 }
 102
 103 /*
 104  * Return true iff the string str, had a name and value extracted and saved in
 105  * name and value. Otherwise return false and leave name and value alone.
 106  */
 107 bool extractLine(const string& str, string* name, string* value)
 108 {
 109     /*
 110      * state    := 0 if eating leading name whitespace
 111      *          := 1 if saving name
 112      *          := 2 if eating trailing name whitespace
 113      *          := 3 if eating leading value whitespace
 114      *          := 4 if saving value
 115      *          := 5 if all is done and well
 116      */
 117     int state = 0;
 118
 119     int char_pos = 0;
 120
 121     int name_start = 0;
 122     int name_end = 0;
 123
 124     int value_start = 0;
 125     int value_end = 0;
 126
 127     const char* c_str = str.c_str();
 128
 129     while(true)
 130     {
 131         if(c_str[char_pos] == 0 && state != 4)
 132             return false;
 133
 134         switch (state)
 135         {
 136             case 0:
 137                 if(c_str[char_pos] != ' '
 138                 && c_str[char_pos] != '\t')
 139                 {
 140                     state++;
 141                     name_start = char_pos;
 142                 }
 143                 break;
 144             case 1:
 145                 if(c_str[char_pos] == ' '
 146                 || c_str[char_pos] == '\t'
 147                 || c_str[char_pos] == '=')
 148                 {
 149                     state++;
 150                     name_end = char_pos;
 151                 }
 152
 153                 if(c_str[char_pos] == '=')
 154                     char_pos--; // decrement to stay on this char
 155                 break;
 156             case 2:
 157                 if(c_str[char_pos] != ' '
 158                 && c_str[char_pos] != '\t'
 159                 && c_str[char_pos] != '=')
 160                 {
 161                     return false;
 162                 }
 163
 164                 if(c_str[char_pos] == '=')
 165                 {
 166                     state++;
 167                 }
 168                 break;
 169             case 3:
 170                 if(c_str[char_pos] != ' '
 171                 && c_str[char_pos] != '\t')
 172                 {
 173                     state++;
 174                     value_start = char_pos;
 175                 }
 176                 break;
 177             case 4:
 178                 if(c_str[char_pos] == ' '
 179                 || c_str[char_pos] == '\t'
 180                 || c_str[char_pos] == 0)
 181                 {
 182                     state++;
 183                     value_end = char_pos;
 184                 }
 185                 break;
 186         }
 187
 188         if(state == 5)
 189             break;
 190
 191         char_pos++;
 192     }
 193
 194     name->clear();
 195     value->clear();
 196
 197     name->replace   (0, 0, c_str, name_start,   name_end  - name_start);
 198     value->replace  (0, 0, c_str, value_start,  value_end - value_start);
 199
 200     return true;
 201 }
 202
 203 void createKeyMap()
 204 {
 205     char buf[2] = {0,0};
 206
 207     // add all the letters
 208     for (int i = 'A'; i <= 'Z'; i++)   // uppercase
 209     {
 210         buf[0] = (char)i;
 211         keyMap[buf] = (SDLKey)i;
 212     }
 213     for (int i = 'a'; i <= 'z'; i++)   // lowercase
 214     {
 215         buf[0] = (char)i;
 216         keyMap[buf] = (SDLKey)i;
 217     }
 218
 219     // add all the numbers
 220     for (int i = '0'; i <= '9'; i++)
 221     {
 222         buf[0] = (char)i;
 223         keyMap[buf] = (SDLKey)i;
 224     }
 225
 226     /*
 227     // add the function keys
 228     int F1 = (int)Key.F1;
 229     for (int i = F1; i <= (int)Key.F15; i++)
 230     {
 231         keyMap.Add("F" + (i - F1 + 1), (Key)i);
 232         keyMap.Add("f" + (i - F1 + 1), (Key)i);
 233     }
 234     */
 235
 236     keyMap["LCtrl"]         = SDLK_LCTRL;
 237     keyMap["LeftControl"]   = SDLK_LCTRL;
 238     keyMap["LAlt"]          = SDLK_LALT;
 239     keyMap["LeftAlt"]       = SDLK_LALT;
 240     keyMap["LShift"]        = SDLK_LSHIFT;
 241     keyMap["LeftShift"]     = SDLK_LSHIFT;
 242     keyMap["LWin"]          = SDLK_LSUPER;
 243     keyMap["LeftWindows"]   = SDLK_LSUPER;
 244     keyMap["LeftMeta"]      = SDLK_LMETA;
 245     keyMap["LMeta"]         = SDLK_LMETA;
 246
 247     keyMap["RCtrl"]         = SDLK_RCTRL;
 248     keyMap["RightControl"]  = SDLK_RCTRL;
 249     keyMap["RAlt"]          = SDLK_RALT;
 250     keyMap["RightAlt"]      = SDLK_RALT;
 251     keyMap["RShift"]        = SDLK_RSHIFT;
 252     keyMap["RightShift"]    = SDLK_RSHIFT;
 253     keyMap["RWin"]          = SDLK_RSUPER;
 254     keyMap["RightWindows"]  = SDLK_RSUPER;
 255     keyMap["RightMeta"]     = SDLK_RMETA;
 256     keyMap["RMeta"]         = SDLK_RMETA;
 257
 258     keyMap["Esc"]           = SDLK_ESCAPE;
 259     keyMap["Escape"]        = SDLK_ESCAPE;
 260
 261     keyMap["Return"]        = SDLK_RETURN;
 262     keyMap["Enter"]         = SDLK_RETURN;
 263
 264     keyMap["Insert"]        = SDLK_INSERT;
 265     keyMap["Home"]          = SDLK_HOME;
 266     keyMap["Delete"]        = SDLK_DELETE;
 267     keyMap["End"]           = SDLK_END;
 268     keyMap["PageUp"]        = SDLK_PAGEUP;
 269     keyMap["PageDown"]      = SDLK_PAGEDOWN;
 270
 271     keyMap["Minus"]         = SDLK_MINUS;
 272     keyMap["Equal"]         = SDLK_EQUALS;
 273     keyMap["Equals"]        = SDLK_EQUALS;
 274     keyMap["LeftBracket"]   = SDLK_LEFTBRACKET;
 275     keyMap["LBracket"]      = SDLK_LEFTBRACKET;
 276     keyMap["RightBracket"]  = SDLK_RIGHTBRACKET;
 277     keyMap["RBracket"]      = SDLK_RIGHTBRACKET;
 278     keyMap["Backslash"]     = SDLK_BACKSLASH;
 279     keyMap["Slash"]         = SDLK_SLASH;
 280     keyMap["Semicolon"]     = SDLK_SEMICOLON;
 281     keyMap["Semi"]          = SDLK_SEMICOLON;
 282     keyMap["Quote"]         = SDLK_QUOTE;
 283     keyMap["Comma"]         = SDLK_COMMA;
 284     keyMap["Period"]        = SDLK_PERIOD;
 285     keyMap["Space"]         = SDLK_SPACE;
 286     keyMap["BSpace"]        = SDLK_BACKSPACE;
 287     keyMap["Backspace"]     = SDLK_BACKSPACE;
 288     keyMap["BackSpace"]     = SDLK_BACKSPACE;
 289
 290     keyMap["Tab"]           = SDLK_TAB;
 291     keyMap["BackQuote"]     = SDLK_BACKQUOTE;
 292     keyMap["BQuote"]        = SDLK_BACKQUOTE;
 293     keyMap["CapsLock"]      = SDLK_CAPSLOCK;
 294     keyMap["Caps"]          = SDLK_CAPSLOCK;
 295
 296     keyMap["Up"]            = SDLK_UP;
 297     keyMap["Down"]          = SDLK_DOWN;
 298     keyMap["Left"]          = SDLK_LEFT;
 299     keyMap["Right"]         = SDLK_RIGHT;
 300 }