input/sdl_key.c

   1 /*
   2  * $Source: /cvs/cvsroot/d2x/input/sdl_key.c,v $
   3  * $Revision: 1.2 $
   4  * $Author: bradleyb $
   5  * $Date: 2001-01-29 14:03:57 $
   6  *
   7  * SDL keyboard input support
   8  *
   9  * $Log: not supported by cvs2svn $
  10  */
  11
  12 #ifdef HAVE_CONFIG_H
  13 #include <conf.h>
  14 #endif
  15
  16 #include <stdio.h>
  17 #include <stdlib.h>
  18
  19 #include <SDL/SDL.h>
  20
  21 #include "event.h"
  22 #include "error.h"
  23 #include "key.h"
  24 #include "timer.h"
  25
  26 //added on 9/3/98 by Matt Mueller to free some cpu instead of hogging during menus and such
  27 #include "d_delay.h"
  28 //end this section addition - Matt Mueller
  29
  30 #define KEY_BUFFER_SIZE 16
  31
  32 static unsigned char Installed = 0;
  33
  34 //-------- Variable accessed by outside functions ---------
  35 unsigned char           keyd_buffer_type;               // 0=No buffer, 1=buffer ASCII, 2=buffer scans
  36 unsigned char           keyd_repeat;
  37 unsigned char           keyd_editor_mode;
  38 volatile unsigned char  keyd_last_pressed;
  39 volatile unsigned char  keyd_last_released;
  40 volatile unsigned char  keyd_pressed[256];
  41 volatile int            keyd_time_when_last_pressed;
  42
  43 typedef struct Key_info {
  44         ubyte           state;                  // state of key 1 == down, 0 == up
  45         ubyte           last_state;             // previous state of key
  46         int             counter;                // incremented each time key is down in handler
  47         fix             timewentdown;   // simple counter incremented each time in interrupt and key is down
  48         fix             timehelddown;   // counter to tell how long key is down -- gets reset to 0 by key routines
  49         ubyte           downcount;              // number of key counts key was down
  50         ubyte           upcount;                // number of times key was released
  51 } Key_info;
  52
  53 typedef struct keyboard {
  54         unsigned short          keybuffer[KEY_BUFFER_SIZE];
  55         Key_info                keys[256];
  56         fix                     time_pressed[KEY_BUFFER_SIZE];
  57         unsigned int            keyhead, keytail;
  58 } keyboard;
  59
  60 static keyboard key_data;
  61
  62 typedef struct key_props {
  63         char *key_text;
  64         unsigned char ascii_value;
  65         unsigned char shifted_ascii_value;
  66         SDLKey sym;
  67 } key_props;
  68
  69 key_props key_properties[256] = {
  70 { "",       255,    255,    -1                 },
  71 { "ESC",    255,    255,    SDLK_ESCAPE        },
  72 { "1",      '1',    '!',    SDLK_1             },
  73 { "2",      '2',    '@',    SDLK_2             },
  74 { "3",      '3',    '#',    SDLK_3             },
  75 { "4",      '4',    '$',    SDLK_4             },
  76 { "5",      '5',    '%',    SDLK_5             },
  77 { "6",      '6',    '^',    SDLK_6             },
  78 { "7",      '7',    '&',    SDLK_7             },
  79 { "8",      '8',    '*',    SDLK_8             },
  80 { "9",      '9',    '(',    SDLK_9             },
  81 { "0",      '0',    ')',    SDLK_0             },
  82 { "-",      '-',    '_',    SDLK_MINUS         },
  83 { "=",      '=',    '+',    SDLK_EQUALS        },
  84 { "BSPC",   255,    255,    SDLK_BACKSPACE     },
  85 { "TAB",    255,    255,    SDLK_TAB           },
  86 { "Q",      'q',    'Q',    SDLK_q             },
  87 { "W",      'w',    'W',    SDLK_w             },
  88 { "E",      'e',    'E',    SDLK_e             },
  89 { "R",      'r',    'R',    SDLK_r             },
  90 { "T",      't',    'T',    SDLK_t             },
  91 { "Y",      'y',    'Y',    SDLK_y             },
  92 { "U",      'u',    'U',    SDLK_u             },
  93 { "I",      'i',    'I',    SDLK_i             },
  94 { "O",      'o',    'O',    SDLK_o             },
  95 { "P",      'p',    'P',    SDLK_p             },
  96 { "[",      '[',    '{',    SDLK_LEFTBRACKET   },
  97 { "]",      ']',    '}',    SDLK_RIGHTBRACKET  },
  98 //edited 06/08/99 Matt Mueller - set to correct key_text
  99 { "\83",      255,    255,    SDLK_RETURN        },
 100 //end edit -MM
 101 { "LCTRL",  255,    255,    SDLK_LCTRL         },
 102 { "A",      'a',    'A',    SDLK_a             },
 103 { "S",      's',    'S',    SDLK_s             },
 104 { "D",      'd',    'D',    SDLK_d             },
 105 { "F",      'f',    'F',    SDLK_f             },
 106 { "G",      'g',    'G',    SDLK_g             },
 107 { "H",      'h',    'H',    SDLK_h             },
 108 { "J",      'j',    'J',    SDLK_j             },
 109 { "K",      'k',    'K',    SDLK_k             },
 110 { "L",      'l',    'L',    SDLK_l             },
 111 //edited 06/08/99 Matt Mueller - set to correct sym
 112 { ";",      ';',    ':',    SDLK_SEMICOLON         },
 113 //end edit -MM
 114 { "'",      '\'',   '"',    SDLK_QUOTE         },
 115 //edited 06/08/99 Matt Mueller - set to correct sym
 116 { "`",      '`',    '~',    SDLK_BACKQUOTE     },
 117 //end edit -MM
 118 { "LSHFT",  255,    255,    SDLK_LSHIFT        },
 119 { "\\",     '\\',   '|',    SDLK_BACKSLASH     },
 120 { "Z",      'z',    'Z',    SDLK_z             },
 121 { "X",      'x',    'X',    SDLK_x             },
 122 { "C",      'c',    'C',    SDLK_c             },
 123 { "V",      'v',    'V',    SDLK_v             },
 124 { "B",      'b',    'B',    SDLK_b             },
 125 { "N",      'n',    'N',    SDLK_n             },
 126 { "M",      'm',    'M',    SDLK_m             },
 127 //edited 06/08/99 Matt Mueller - set to correct syms
 128 { ",",      ',',    '<',    SDLK_COMMA  },
 129 { ".",      '.',    '>',    SDLK_PERIOD },
 130 { "/",      '/',    '?',    SDLK_SLASH  },
 131 //end edit -MM
 132 { "RSHFT",  255,    255,    SDLK_RSHIFT },
 133 { "PAD*",   '*',    255,    SDLK_KP_MULTIPLY   },
 134 { "LALT",   255,    255,    SDLK_LALT          },
 135 { "SPC",    ' ',    ' ',    SDLK_SPACE         },
 136 { "CPSLK",  255,    255,    SDLK_CAPSLOCK      },
 137 { "F1",     255,    255,    SDLK_F1            },
 138 { "F2",     255,    255,    SDLK_F2            },
 139 { "F3",     255,    255,    SDLK_F3            },
 140 { "F4",     255,    255,    SDLK_F4            },
 141 { "F5",     255,    255,    SDLK_F5            },
 142 { "F6",     255,    255,    SDLK_F6            },
 143 { "F7",     255,    255,    SDLK_F7            },
 144 { "F8",     255,    255,    SDLK_F8            },
 145 { "F9",     255,    255,    SDLK_F9            },
 146 { "F10",    255,    255,    SDLK_F10           },
 147 { "NMLCK",  255,    255,    SDLK_NUMLOCK       },
 148 { "SCLK",   255,    255,    SDLK_SCROLLOCK     },
 149 { "PAD7",   255,    255,    SDLK_KP7           },
 150 { "PAD8",   255,    255,    SDLK_KP8           },
 151 { "PAD9",   255,    255,    SDLK_KP9           },
 152 { "PAD-",   255,    255,    SDLK_KP_MINUS      },
 153 { "PAD4",   255,    255,    SDLK_KP4           },
 154 { "PAD5",   255,    255,    SDLK_KP5           },
 155 { "PAD6",   255,    255,    SDLK_KP6           },
 156 { "PAD+",   255,    255,    SDLK_KP_PLUS       },
 157 { "PAD1",   255,    255,    SDLK_KP1           },
 158 { "PAD2",   255,    255,    SDLK_KP2           },
 159 { "PAD3",   255,    255,    SDLK_KP3           },
 160 { "PAD0",   255,    255,    SDLK_KP0           },
 161 { "PAD.",   255,    255,    SDLK_KP_PERIOD     },
 162 { "",       255,    255,    -1                 },
 163 { "",       255,    255,    -1                 },
 164 { "",       255,    255,    -1                 },
 165 { "F11",    255,    255,    SDLK_F11           },
 166 { "F12",    255,    255,    SDLK_F12           },
 167 { "",       255,    255,    -1                 },
 168 { "",       255,    255,    -1                 },
 169 { "",       255,    255,    -1                 },
 170 { "",       255,    255,    -1                 },
 171 { "",       255,    255,    -1                 },
 172 { "",       255,    255,    -1                 },
 173 { "",       255,    255,    -1                 },
 174 { "",       255,    255,    -1                 },
 175 //edited 06/08/99 Matt Mueller - add pause ability
 176 { "PAUSE",       255,    255,    SDLK_PAUSE                 },
 177 //end edit -MM
 178 { "",       255,    255,    -1                 },
 179 { "",       255,    255,    -1                 },
 180 { "",       255,    255,    -1                 },
 181 { "",       255,    255,    -1                 },
 182 { "",       255,    255,    -1                 },
 183 { "",       255,    255,    -1                 },
 184 { "",       255,    255,    -1                 },
 185 { "",       255,    255,    -1                 },
 186 { "",       255,    255,    -1                 },
 187 { "",       255,    255,    -1                 },
 188 { "",       255,    255,    -1                 },
 189 { "",       255,    255,    -1                 },
 190 { "",       255,    255,    -1                 },
 191 { "",       255,    255,    -1                 },
 192 { "",       255,    255,    -1                 },
 193 { "",       255,    255,    -1                 },
 194 { "",       255,    255,    -1                 },
 195 { "",       255,    255,    -1                 },
 196 { "",       255,    255,    -1                 },
 197 { "",       255,    255,    -1                 },
 198 { "",       255,    255,    -1                 },
 199 { "",       255,    255,    -1                 },
 200 { "",       255,    255,    -1                 },
 201 { "",       255,    255,    -1                 },
 202 { "",       255,    255,    -1                 },
 203 { "",       255,    255,    -1                 },
 204 { "",       255,    255,    -1                 },
 205 { "",       255,    255,    -1                 },
 206 { "",       255,    255,    -1                 },
 207 { "",       255,    255,    -1                 },
 208 { "",       255,    255,    -1                 },
 209 { "",       255,    255,    -1                 },
 210 { "",       255,    255,    -1                 },
 211 { "",       255,    255,    -1                 },
 212 { "",       255,    255,    -1                 },
 213 { "",       255,    255,    -1                 },
 214 { "",       255,    255,    -1                 },
 215 { "",       255,    255,    -1                 },
 216 { "",       255,    255,    -1                 },
 217 { "",       255,    255,    -1                 },
 218 { "",       255,    255,    -1                 },
 219 { "",       255,    255,    -1                 },
 220 { "",       255,    255,    -1                 },
 221 { "",       255,    255,    -1                 },
 222 { "",       255,    255,    -1                 },
 223 { "",       255,    255,    -1                 },
 224 { "",       255,    255,    -1                 },
 225 { "",       255,    255,    -1                 },
 226 { "",       255,    255,    -1                 },
 227 { "",       255,    255,    -1                 },
 228 { "",       255,    255,    -1                 },
 229 { "",       255,    255,    -1                 },
 230 { "",       255,    255,    -1                 },
 231 { "",       255,    255,    -1                 },
 232 { "",       255,    255,    -1                 },
 233 { "",       255,    255,    -1                 },
 234 { "",       255,    255,    -1                 },
 235 { "",       255,    255,    -1                 },
 236 //edited 06/08/99 Matt Mueller - set to correct key_text
 237 { "PAD\83",   255,    255,    SDLK_KP_ENTER      },
 238 //end edit -MM
 239 //edited 06/08/99 Matt Mueller - set to correct sym
 240 { "RCTRL",  255,    255,    SDLK_RCTRL            },
 241 //end edit -MM
 242 { "",       255,    255,    -1                 },
 243 { "",       255,    255,    -1                 },
 244 { "",       255,    255,    -1                 },
 245 { "",       255,    255,    -1                 },
 246 { "",       255,    255,    -1                 },
 247 { "",       255,    255,    -1                 },
 248 { "",       255,    255,    -1                 },
 249 { "",       255,    255,    -1                 },
 250 { "",       255,    255,    -1                 },
 251 { "",       255,    255,    -1                 },
 252 { "",       255,    255,    -1                 },
 253 { "",       255,    255,    -1                 },
 254 { "",       255,    255,    -1                 },
 255 { "",       255,    255,    -1                 },
 256 { "",       255,    255,    -1                 },
 257 { "",       255,    255,    -1                 },
 258 { "",       255,    255,    -1                 },
 259 { "",       255,    255,    -1                 },
 260 { "",       255,    255,    -1                 },
 261 { "",       255,    255,    -1                 },
 262 { "",       255,    255,    -1                 },
 263 { "",       255,    255,    -1                 },
 264 { "",       255,    255,    -1                 },
 265 { "PAD/",   255,    255,    SDLK_KP_DIVIDE     },
 266 { "",       255,    255,    -1                 },
 267 //edited 06/08/99 Matt Mueller - add printscreen ability
 268 { "PRSCR",       255,    255,    SDLK_PRINT                 },
 269 //end edit -MM
 270 { "RALT",   255,    255,    SDLK_RALT          },
 271 { "",       255,    255,    -1                 },
 272 { "",       255,    255,    -1                 },
 273 { "",       255,    255,    -1                 },
 274 { "",       255,    255,    -1                 },
 275 { "",       255,    255,    -1                 },
 276 { "",       255,    255,    -1                 },
 277 { "",       255,    255,    -1                 },
 278 { "",       255,    255,    -1                 },
 279 { "",       255,    255,    -1                 },
 280 { "",       255,    255,    -1                 },
 281 { "",       255,    255,    -1                 },
 282 { "",       255,    255,    -1                 },
 283 { "",       255,    255,    -1                 },
 284 { "",       255,    255,    -1                 },
 285 { "HOME",   255,    255,    SDLK_HOME          },
 286 //edited 06/08/99 Matt Mueller - set to correct key_text
 287 { "UP",         255,    255,    SDLK_UP            },
 288 //end edit -MM
 289 { "PGUP",   255,    255,    SDLK_PAGEUP        },
 290 { "",       255,    255,    -1                 },
 291 //edited 06/08/99 Matt Mueller - set to correct key_text
 292 { "LEFT",       255,    255,    SDLK_LEFT          },
 293 //end edit -MM
 294 { "",       255,    255,    -1                 },
 295 //edited 06/08/99 Matt Mueller - set to correct key_text
 296 { "RIGHT",      255,    255,    SDLK_RIGHT         },
 297 //end edit -MM
 298 { "",       255,    255,    -1                 },
 299 //edited 06/08/99 Matt Mueller - set to correct key_text
 300 { "END",    255,    255,    SDLK_END           },
 301 //end edit -MM
 302 { "DOWN",       255,    255,    SDLK_DOWN          },
 303 { "PGDN",       255,    255,    SDLK_PAGEDOWN      },
 304 { "INS",        255,    255,    SDLK_INSERT        },
 305 { "DEL",        255,    255,    SDLK_DELETE        },
 306 { "",       255,    255,    -1                 },
 307 { "",       255,    255,    -1                 },
 308 { "",       255,    255,    -1                 },
 309 { "",       255,    255,    -1                 },
 310 { "",       255,    255,    -1                 },
 311 { "",       255,    255,    -1                 },
 312 { "",       255,    255,    -1                 },
 313 { "",       255,    255,    -1                 },
 314 { "",       255,    255,    -1                 },
 315 { "",       255,    255,    -1                 },
 316 { "",       255,    255,    -1                 },
 317 { "",       255,    255,    -1                 },
 318 { "",       255,    255,    -1                 },
 319 { "",       255,    255,    -1                 },
 320 { "",       255,    255,    -1                 },
 321 { "",       255,    255,    -1                 },
 322 { "",       255,    255,    -1                 },
 323 { "",       255,    255,    -1                 },
 324 { "",       255,    255,    -1                 },
 325 { "",       255,    255,    -1                 },
 326 { "",       255,    255,    -1                 },
 327 { "",       255,    255,    -1                 },
 328 { "",       255,    255,    -1                 },
 329 { "",       255,    255,    -1                 },
 330 { "",       255,    255,    -1                 },
 331 { "",       255,    255,    -1                 },
 332 { "",       255,    255,    -1                 },
 333 { "",       255,    255,    -1                 },
 334 { "",       255,    255,    -1                 },
 335 { "",       255,    255,    -1                 },
 336 { "",       255,    255,    -1                 },
 337 { "",       255,    255,    -1                 },
 338 { "",       255,    255,    -1                 },
 339 { "",       255,    255,    -1                 },
 340 { "",       255,    255,    -1                 },
 341 { "",       255,    255,    -1                 },
 342 { "",       255,    255,    -1                 },
 343 { "",       255,    255,    -1                 },
 344 { "",       255,    255,    -1                 },
 345 { "",       255,    255,    -1                 },
 346 { "",       255,    255,    -1                 },
 347 { "",       255,    255,    -1                 },
 348 { "",       255,    255,    -1                 },
 349 { "",       255,    255,    -1                 },
 350 };
 351
 352 char *key_text[256];
 353
 354 void key_buid_key_text(void)
 355 {
 356 }
 357
 358 unsigned char key_to_ascii(int keycode )
 359 {
 360         int shifted;
 361
 362         shifted = keycode & KEY_SHIFTED;
 363         keycode &= 0xFF;
 364
 365         if (shifted)
 366                 return key_properties[keycode].shifted_ascii_value;
 367         else
 368                 return key_properties[keycode].ascii_value;
 369 }
 370
 371 void key_handler(SDL_KeyboardEvent *event)
 372 {
 373         ubyte state;
 374         int i, keycode, event_key, key_state;
 375         Key_info *key;
 376         unsigned char temp;
 377
 378         event_key = event->keysym.sym;
 379
 380         key_state = (event->state == SDL_PRESSED); //  !(wInfo & KF_UP);
 381         //=====================================================
 382         //Here a translation from win keycodes to mac keycodes!
 383         //=====================================================
 384
 385         for (i = 255; i >= 0; i--) {
 386
 387                 keycode = i;
 388                 key = &(key_data.keys[keycode]);
 389                 if (key_properties[i].sym == event_key)
 390                         state = key_state;
 391                 else
 392                         state = key->last_state;
 393
 394                 if ( key->last_state == state ) {
 395                         if (state) {
 396                                 key->counter++;
 397                                 keyd_last_pressed = keycode;
 398                                 keyd_time_when_last_pressed = timer_get_fixed_seconds();
 399                         }
 400                 } else {
 401                         if (state)      {
 402                                 keyd_last_pressed = keycode;
 403                                 keyd_pressed[keycode] = 1;
 404                                 key->downcount += state;
 405                                 key->state = 1;
 406                                 key->timewentdown = keyd_time_when_last_pressed = timer_get_fixed_seconds();
 407                                 key->counter++;
 408                         } else {
 409                                 keyd_pressed[keycode] = 0;
 410                                 keyd_last_released = keycode;
 411                                 key->upcount += key->state;
 412                                 key->state = 0;
 413                                 key->counter = 0;
 414                                 key->timehelddown += timer_get_fixed_seconds() - key->timewentdown;
 415                         }
 416                 }
 417                 if ( (state && !key->last_state) || (state && key->last_state && (key->counter > 30) && (key->counter & 0x01)) ) {
 418                         if ( keyd_pressed[KEY_LSHIFT] || keyd_pressed[KEY_RSHIFT])
 419                                 keycode |= KEY_SHIFTED;
 420                         if ( keyd_pressed[KEY_LALT] || keyd_pressed[KEY_RALT])
 421                                 keycode |= KEY_ALTED;
 422                         if ( keyd_pressed[KEY_LCTRL] || keyd_pressed[KEY_RCTRL])
 423                                 keycode |= KEY_CTRLED;
 424                         if ( keyd_pressed[KEY_DELETE] )
 425                                 keycode |= KEY_DEBUGGED;
 426                         temp = key_data.keytail+1;
 427                         if ( temp >= KEY_BUFFER_SIZE ) temp=0;
 428                         if (temp!=key_data.keyhead)     {
 429                                 key_data.keybuffer[key_data.keytail] = keycode;
 430                                 key_data.time_pressed[key_data.keytail] = keyd_time_when_last_pressed;
 431                                 key_data.keytail = temp;
 432                         }
 433                 }
 434                 key->last_state = state;
 435         }
 436 }
 437
 438 void key_close()
 439 {
 440  Installed = 0;
 441 }
 442
 443 void key_init()
 444 {
 445   int i;
 446
 447   if (Installed) return;
 448
 449   Installed=1;
 450
 451   keyd_time_when_last_pressed = timer_get_fixed_seconds();
 452   keyd_buffer_type = 1;
 453   keyd_repeat = 1;
 454
 455   for(i=0; i<256; i++)
 456      key_text[i] = key_properties[i].key_text;
 457
 458   // Clear the keyboard array
 459   key_flush();
 460   atexit(key_close);
 461 }
 462
 463 void key_flush()
 464 {
 465         int i;
 466         fix curtime;
 467
 468         if (!Installed)
 469                 key_init();
 470
 471         key_data.keyhead = key_data.keytail = 0;
 472
 473         //Clear the keyboard buffer
 474         for (i=0; i<KEY_BUFFER_SIZE; i++ )      {
 475                 key_data.keybuffer[i] = 0;
 476                 key_data.time_pressed[i] = 0;
 477         }
 478
 479 //use gettimeofday here:
 480         curtime = timer_get_fixed_seconds();
 481
 482         for (i=0; i<256; i++ )  {
 483                 keyd_pressed[i] = 0;
 484                 key_data.keys[i].state = 1;
 485                 key_data.keys[i].last_state = 0;
 486                 key_data.keys[i].timewentdown = curtime;
 487                 key_data.keys[i].downcount=0;
 488                 key_data.keys[i].upcount=0;
 489                 key_data.keys[i].timehelddown = 0;
 490                 key_data.keys[i].counter = 0;
 491         }
 492 }
 493
 494 int add_one(int n)
 495 {
 496  n++;
 497  if ( n >= KEY_BUFFER_SIZE ) n=0;
 498  return n;
 499 }
 500
 501 int key_checkch()
 502 {
 503         int is_one_waiting = 0;
 504         event_poll();
 505         if (key_data.keytail!=key_data.keyhead)
 506                 is_one_waiting = 1;
 507         return is_one_waiting;
 508 }
 509
 510 int key_inkey()
 511 {
 512         int key = 0;
 513         if (!Installed)
 514                 key_init();
 515         event_poll();
 516         if (key_data.keytail!=key_data.keyhead) {
 517                 key = key_data.keybuffer[key_data.keyhead];
 518                 key_data.keyhead = add_one(key_data.keyhead);
 519         }
 520 //added 9/3/98 by Matt Mueller to free cpu time instead of hogging during menus and such
 521         else d_delay(1);
 522 //end addition - Matt Mueller
 523
 524         return key;
 525 }
 526
 527 int key_inkey_time(fix * time)
 528 {
 529         int key = 0;
 530
 531         if (!Installed)
 532                 key_init();
 533         event_poll();
 534         if (key_data.keytail!=key_data.keyhead) {
 535                 key = key_data.keybuffer[key_data.keyhead];
 536                 *time = key_data.time_pressed[key_data.keyhead];
 537                 key_data.keyhead = add_one(key_data.keyhead);
 538         }
 539         return key;
 540 }
 541
 542 int key_peekkey()
 543 {
 544         int key = 0;
 545         event_poll();
 546         if (key_data.keytail!=key_data.keyhead)
 547                 key = key_data.keybuffer[key_data.keyhead];
 548
 549         return key;
 550 }
 551
 552 int key_getch()
 553 {
 554         int dummy=0;
 555
 556         if (!Installed)
 557                 return 0;
 558 //              return getch();
 559
 560         while (!key_checkch())
 561                 dummy++;
 562         return key_inkey();
 563 }
 564
 565 unsigned int key_get_shift_status()
 566 {
 567         unsigned int shift_status = 0;
 568
 569         if ( keyd_pressed[KEY_LSHIFT] || keyd_pressed[KEY_RSHIFT] )
 570                 shift_status |= KEY_SHIFTED;
 571
 572         if ( keyd_pressed[KEY_LALT] || keyd_pressed[KEY_RALT] )
 573                 shift_status |= KEY_ALTED;
 574
 575         if ( keyd_pressed[KEY_LCTRL] || keyd_pressed[KEY_RCTRL] )
 576                 shift_status |= KEY_CTRLED;
 577
 578 #ifndef NDEBUG
 579         if (keyd_pressed[KEY_DELETE])
 580                 shift_status |=KEY_DEBUGGED;
 581 #endif
 582
 583         return shift_status;
 584 }
 585
 586 // Returns the number of seconds this key has been down since last call.
 587 fix key_down_time(int scancode)
 588 {
 589         fix time_down, time;
 590
 591         event_poll();
 592         if ((scancode<0)|| (scancode>255)) return 0;
 593
 594         if (!keyd_pressed[scancode]) {
 595                 time_down = key_data.keys[scancode].timehelddown;
 596                 key_data.keys[scancode].timehelddown = 0;
 597         } else {
 598                 time = timer_get_fixed_seconds();
 599                 time_down = time - key_data.keys[scancode].timewentdown;
 600                 key_data.keys[scancode].timewentdown = time;
 601         }
 602
 603         return time_down;
 604 }
 605
 606 unsigned int key_down_count(int scancode)
 607 {
 608         int n;
 609         event_poll();
 610         if ((scancode<0)|| (scancode>255)) return 0;
 611
 612         n = key_data.keys[scancode].downcount;
 613         key_data.keys[scancode].downcount = 0;
 614
 615         return n;
 616 }
 617
 618 unsigned int key_up_count(int scancode)
 619 {
 620         int n;
 621         event_poll();
 622         if ((scancode<0)|| (scancode>255)) return 0;
 623
 624         n = key_data.keys[scancode].upcount;
 625         key_data.keys[scancode].upcount = 0;
 626
 627         return n;
 628 }