arch/sdl/key.c

   1 /*
   2  *
   3  * SDL keyboard input support
   4  *
   5  *
   6  */
   7
   8 #ifdef HAVE_CONFIG_H
   9 #include <conf.h>
  10 #endif
  11
  12 #include <stdio.h>
  13 #include <stdlib.h>
  14
  15 #include <SDL.h>
  16
  17 #include "event.h"
  18 #include "error.h"
  19 #include "key.h"
  20 #include "timer.h"
  21 #include "console.h"
  22 #include "u_mem.h"
  23
  24
  25 #define KEY_BUFFER_SIZE 16
  26
  27 static unsigned char Installed = 0;
  28
  29 //-------- Variable accessed by outside functions ---------
  30 unsigned char           keyd_buffer_type;               // 0=No buffer, 1=buffer ASCII, 2=buffer scans
  31 unsigned char           keyd_repeat;
  32 unsigned char           keyd_editor_mode;
  33 volatile unsigned char  keyd_last_pressed;
  34 volatile unsigned char  keyd_last_released;
  35 volatile unsigned char  keyd_pressed[256];
  36 volatile int            keyd_time_when_last_pressed;
  37
  38 typedef struct Key_info {
  39         ubyte           state;                  // state of key 1 == down, 0 == up
  40         ubyte           last_state;             // previous state of key
  41         int             counter;                // incremented each time key is down in handler
  42         fix             timewentdown;   // simple counter incremented each time in interrupt and key is down
  43         fix             timehelddown;   // counter to tell how long key is down -- gets reset to 0 by key routines
  44         ubyte           downcount;              // number of key counts key was down
  45         ubyte           upcount;                // number of times key was released
  46 } Key_info;
  47
  48 typedef struct keyboard {
  49         unsigned short          keybuffer[KEY_BUFFER_SIZE];
  50         Key_info                keys[256];
  51         fix                     time_pressed[KEY_BUFFER_SIZE];
  52         unsigned int            keyhead, keytail;
  53 } keyboard;
  54
  55 static keyboard key_data;
  56
  57 typedef struct key_props {
  58         char *key_text;
  59         unsigned char ascii_value;
  60         unsigned char shifted_ascii_value;
  61         SDLKey sym;
  62 } key_props;
  63
  64 key_props key_properties[256] = {
  65 { "",       255,    255,    -1                 },
  66 { "ESC",    255,    255,    SDLK_ESCAPE        },
  67 { "1",      '1',    '!',    SDLK_1             },
  68 { "2",      '2',    '@',    SDLK_2             },
  69 { "3",      '3',    '#',    SDLK_3             },
  70 { "4",      '4',    '$',    SDLK_4             },
  71 { "5",      '5',    '%',    SDLK_5             },
  72 { "6",      '6',    '^',    SDLK_6             },
  73 { "7",      '7',    '&',    SDLK_7             },
  74 { "8",      '8',    '*',    SDLK_8             },
  75 { "9",      '9',    '(',    SDLK_9             },
  76 { "0",      '0',    ')',    SDLK_0             },
  77 { "-",      '-',    '_',    SDLK_MINUS         },
  78 { "=",      '=',    '+',    SDLK_EQUALS        },
  79 { "BSPC",   255,    255,    SDLK_BACKSPACE     },
  80 { "TAB",    255,    255,    SDLK_TAB           },
  81 { "Q",      'q',    'Q',    SDLK_q             },
  82 { "W",      'w',    'W',    SDLK_w             },
  83 { "E",      'e',    'E',    SDLK_e             },
  84 { "R",      'r',    'R',    SDLK_r             },
  85 { "T",      't',    'T',    SDLK_t             },
  86 { "Y",      'y',    'Y',    SDLK_y             },
  87 { "U",      'u',    'U',    SDLK_u             },
  88 { "I",      'i',    'I',    SDLK_i             },
  89 { "O",      'o',    'O',    SDLK_o             },
  90 { "P",      'p',    'P',    SDLK_p             },
  91 { "[",      '[',    '{',    SDLK_LEFTBRACKET   },
  92 { "]",      ']',    '}',    SDLK_RIGHTBRACKET  },
  93 //edited 06/08/99 Matt Mueller - set to correct key_text
  94 { "\x83",   255,    255,    SDLK_RETURN        },
  95 //end edit -MM
  96 { "LCTRL",  255,    255,    SDLK_LCTRL         },
  97 { "A",      'a',    'A',    SDLK_a             },
  98 { "S",      's',    'S',    SDLK_s             },
  99 { "D",      'd',    'D',    SDLK_d             },
 100 { "F",      'f',    'F',    SDLK_f             },
 101 { "G",      'g',    'G',    SDLK_g             },
 102 { "H",      'h',    'H',    SDLK_h             },
 103 { "J",      'j',    'J',    SDLK_j             },
 104 { "K",      'k',    'K',    SDLK_k             },
 105 { "L",      'l',    'L',    SDLK_l             },
 106 //edited 06/08/99 Matt Mueller - set to correct sym
 107 { ";",      ';',    ':',    SDLK_SEMICOLON         },
 108 //end edit -MM
 109 { "'",      '\'',   '"',    SDLK_QUOTE         },
 110 //edited 06/08/99 Matt Mueller - set to correct sym
 111 { "`",      '`',    '~',    SDLK_BACKQUOTE     },
 112 //end edit -MM
 113 { "LSHFT",  255,    255,    SDLK_LSHIFT        },
 114 { "\\",     '\\',   '|',    SDLK_BACKSLASH     },
 115 { "Z",      'z',    'Z',    SDLK_z             },
 116 { "X",      'x',    'X',    SDLK_x             },
 117 { "C",      'c',    'C',    SDLK_c             },
 118 { "V",      'v',    'V',    SDLK_v             },
 119 { "B",      'b',    'B',    SDLK_b             },
 120 { "N",      'n',    'N',    SDLK_n             },
 121 { "M",      'm',    'M',    SDLK_m             },
 122 //edited 06/08/99 Matt Mueller - set to correct syms
 123 { ",",      ',',    '<',    SDLK_COMMA  },
 124 { ".",      '.',    '>',    SDLK_PERIOD },
 125 { "/",      '/',    '?',    SDLK_SLASH  },
 126 //end edit -MM
 127 { "RSHFT",  255,    255,    SDLK_RSHIFT },
 128 { "PAD*",   '*',    255,    SDLK_KP_MULTIPLY   },
 129 { "LALT",   255,    255,    SDLK_LALT          },
 130 { "SPC",    ' ',    ' ',    SDLK_SPACE         },
 131 { "CPSLK",  255,    255,    SDLK_CAPSLOCK      },
 132 { "F1",     255,    255,    SDLK_F1            },
 133 { "F2",     255,    255,    SDLK_F2            },
 134 { "F3",     255,    255,    SDLK_F3            },
 135 { "F4",     255,    255,    SDLK_F4            },
 136 { "F5",     255,    255,    SDLK_F5            },
 137 { "F6",     255,    255,    SDLK_F6            },
 138 { "F7",     255,    255,    SDLK_F7            },
 139 { "F8",     255,    255,    SDLK_F8            },
 140 { "F9",     255,    255,    SDLK_F9            },
 141 { "F10",    255,    255,    SDLK_F10           },
 142 { "NMLCK",  255,    255,    SDLK_NUMLOCK       },
 143 { "SCLK",   255,    255,    SDLK_SCROLLOCK     },
 144 { "PAD7",   255,    255,    SDLK_KP7           },
 145 { "PAD8",   255,    255,    SDLK_KP8           },
 146 { "PAD9",   255,    255,    SDLK_KP9           },
 147 { "PAD-",   255,    255,    SDLK_KP_MINUS      },
 148 { "PAD4",   255,    255,    SDLK_KP4           },
 149 { "PAD5",   255,    255,    SDLK_KP5           },
 150 { "PAD6",   255,    255,    SDLK_KP6           },
 151 { "PAD+",   255,    255,    SDLK_KP_PLUS       },
 152 { "PAD1",   255,    255,    SDLK_KP1           },
 153 { "PAD2",   255,    255,    SDLK_KP2           },
 154 { "PAD3",   255,    255,    SDLK_KP3           },
 155 { "PAD0",   255,    255,    SDLK_KP0           },
 156 { "PAD.",   255,    255,    SDLK_KP_PERIOD     },
 157 { "",       255,    255,    -1                 },
 158 { "",       255,    255,    -1                 },
 159 { "",       255,    255,    -1                 },
 160 { "F11",    255,    255,    SDLK_F11           },
 161 { "F12",    255,    255,    SDLK_F12           },
 162 { "",       255,    255,    -1                 },
 163 { "",       255,    255,    -1                 },
 164 { "",       255,    255,    -1                 },
 165 { "",       255,    255,    -1                 },
 166 { "",       255,    255,    -1                 },
 167 { "",       255,    255,    -1                 },
 168 { "",       255,    255,    -1                 },
 169 { "",       255,    255,    -1                 },
 170 //edited 06/08/99 Matt Mueller - add pause ability
 171 { "PAUSE",       255,    255,    SDLK_PAUSE                 },
 172 //end edit -MM
 173 { "",       255,    255,    -1                 },
 174 { "",       255,    255,    -1                 },
 175 { "",       255,    255,    -1                 },
 176 { "",       255,    255,    -1                 },
 177 { "",       255,    255,    -1                 },
 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 //edited 06/08/99 Matt Mueller - set to correct key_text
 232 { "PAD\x83",255,    255,    SDLK_KP_ENTER      },
 233 //end edit -MM
 234 //edited 06/08/99 Matt Mueller - set to correct sym
 235 { "RCTRL",  255,    255,    SDLK_RCTRL            },
 236 //end edit -MM
 237 { "LCMD",   255,    255,    SDLK_LMETA         },
 238 { "RCMD",   255,    255,    SDLK_RMETA         },
 239 { "",       255,    255,    -1                 },
 240 { "",       255,    255,    -1                 },
 241 { "",       255,    255,    -1                 },
 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 { "PAD/",   255,    255,    SDLK_KP_DIVIDE     },
 261 { "",       255,    255,    -1                 },
 262 //edited 06/08/99 Matt Mueller - add printscreen ability
 263 { "PRSCR",       255,    255,    SDLK_PRINT                 },
 264 //end edit -MM
 265 { "RALT",   255,    255,    SDLK_RALT          },
 266 { "",       255,    255,    -1                 },
 267 { "",       255,    255,    -1                 },
 268 { "",       255,    255,    -1                 },
 269 { "",       255,    255,    -1                 },
 270 { "",       255,    255,    -1                 },
 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 { "HOME",   255,    255,    SDLK_HOME          },
 281 //edited 06/08/99 Matt Mueller - set to correct key_text
 282 { "UP",         255,    255,    SDLK_UP            },
 283 //end edit -MM
 284 { "PGUP",   255,    255,    SDLK_PAGEUP        },
 285 { "",       255,    255,    -1                 },
 286 //edited 06/08/99 Matt Mueller - set to correct key_text
 287 { "LEFT",       255,    255,    SDLK_LEFT          },
 288 //end edit -MM
 289 { "",       255,    255,    -1                 },
 290 //edited 06/08/99 Matt Mueller - set to correct key_text
 291 { "RIGHT",      255,    255,    SDLK_RIGHT         },
 292 //end edit -MM
 293 { "",       255,    255,    -1                 },
 294 //edited 06/08/99 Matt Mueller - set to correct key_text
 295 { "END",    255,    255,    SDLK_END           },
 296 //end edit -MM
 297 { "DOWN",       255,    255,    SDLK_DOWN          },
 298 { "PGDN",       255,    255,    SDLK_PAGEDOWN      },
 299 { "INS",        255,    255,    SDLK_INSERT        },
 300 { "DEL",        255,    255,    SDLK_DELETE        },
 301 { "",       255,    255,    -1                 },
 302 { "",       255,    255,    -1                 },
 303 { "",       255,    255,    -1                 },
 304 { "",       255,    255,    -1                 },
 305 { "",       255,    255,    -1                 },
 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 };
 346
 347 char *key_text[256];
 348
 349 void key_buid_key_text(void)
 350 {
 351 }
 352
 353 unsigned char key_to_ascii(int keycode )
 354 {
 355         int shifted;
 356
 357         shifted = keycode & KEY_SHIFTED;
 358         keycode &= 0xFF;
 359
 360         if (shifted)
 361                 return key_properties[keycode].shifted_ascii_value;
 362         else
 363                 return key_properties[keycode].ascii_value;
 364 }
 365
 366
 367 /* The list of keybindings */
 368 static char *key_binding_list[256];
 369
 370
 371 /* get the action bound to a key, if any */
 372 char *key_binding(ubyte keycode)
 373 {
 374         return key_binding_list[keycode];
 375 }
 376
 377
 378 /* Write key bindings to file */
 379 void key_write_bindings(CFILE *file)
 380 {
 381         int i;
 382
 383         for (i = 0; i < 256; i++)
 384                 if (key_binding_list[i])
 385                         PHYSFSX_printf(file, "bind %s \"%s\"\n", key_text[i], key_binding_list[i]);
 386 }
 387
 388
 389 /* bind */
 390 /* FIXME: key_text is not really adequate for this */
 391 void key_cmd_bind(int argc, char **argv)
 392 {
 393         char buf[CMD_MAX_LENGTH] = "";
 394         unsigned char key = 0;
 395         int i;
 396
 397         if (argc < 2)
 398         {
 399                 con_printf(CON_NORMAL, "key bindings:\n");
 400                 for (i = 0; i < 256; i++) {
 401                         if (!key_binding_list[i])
 402                                 continue;
 403                         con_printf(CON_NORMAL, "%s: %s\n", key_text[i], key_binding_list[i]);
 404                 }
 405                 return;
 406         }
 407
 408         for (i = 2; i < argc; i++) {
 409                 if (i > 2)
 410                         strncat(buf, " ", CMD_MAX_LENGTH);
 411                 strncat(buf, argv[i], CMD_MAX_LENGTH);
 412         }
 413
 414         for (i = 0; i < 256; i++) {
 415                 if (!stricmp(argv[1], key_text[i])) {
 416                         key = i;
 417                         break;
 418                 }
 419         }
 420
 421         if (!key) {
 422                 con_printf(CON_CRITICAL, "bind: key %s not found\n", argv[1]);
 423                 return;
 424         }
 425
 426         if (key_binding_list[key])
 427                 d_free(key_binding_list[key]);
 428         key_binding_list[key] = d_strdup(buf);
 429 }
 430
 431
 432 /* unbind */
 433 void key_cmd_unbind(int argc, char **argv)
 434 {
 435         unsigned int key;
 436
 437         if (argc < 2)
 438                 return;
 439
 440         for (key = 0; key < 256; key++) {
 441                 if (!stricmp(argv[1], key_text[key])) {
 442                         break;
 443                 }
 444         }
 445
 446         if (key_binding_list[key])
 447                 d_free(key_binding_list[key]);
 448         key_binding_list[key] = NULL;
 449 }
 450
 451
 452 static void key_handle_binding(int keycode, int state)
 453 {
 454         if (!key_binding_list[keycode])
 455                 return;
 456
 457         if (!state && key_binding_list[keycode][0] == '+')
 458                 cmd_appendf("-%s", &key_binding_list[keycode][1]);
 459         else
 460                 cmd_append(key_binding_list[keycode]);
 461 }
 462
 463
 464 void key_handler(SDL_KeyboardEvent *event)
 465 {
 466         ubyte state;
 467         int i, keycode, event_key, key_state;
 468         Key_info *key;
 469         unsigned char temp;
 470
 471         event_key = event->keysym.sym;
 472
 473         key_state = (event->state == SDL_PRESSED); //  !(wInfo & KF_UP);
 474         //=====================================================
 475         //Here a translation from win keycodes to mac keycodes!
 476         //=====================================================
 477
 478         for (i = 255; i >= 0; i--) {
 479
 480                 keycode = i;
 481                 key = &(key_data.keys[keycode]);
 482                 if (key_properties[i].sym == event_key) {
 483                         state = key_state;
 484                         key_handle_binding(keycode, state);
 485                 } else
 486                         state = key->last_state;
 487
 488                 if ( key->last_state == state ) {
 489                         if (state) {
 490                                 key->counter++;
 491                                 keyd_last_pressed = keycode;
 492                                 keyd_time_when_last_pressed = timer_get_fixed_seconds();
 493                         }
 494                 } else {
 495                         if (state)      {
 496                                 keyd_last_pressed = keycode;
 497                                 keyd_pressed[keycode] = 1;
 498                                 key->downcount += state;
 499                                 key->state = 1;
 500                                 key->timewentdown = keyd_time_when_last_pressed = timer_get_fixed_seconds();
 501                                 key->counter++;
 502                         } else {
 503                                 keyd_pressed[keycode] = 0;
 504                                 keyd_last_released = keycode;
 505                                 key->upcount += key->state;
 506                                 key->state = 0;
 507                                 key->counter = 0;
 508                                 key->timehelddown += timer_get_fixed_seconds() - key->timewentdown;
 509                         }
 510                 }
 511                 if ( (state && !key->last_state) || (state && key->last_state && (key->counter > 30) && (key->counter & 0x01)) ) {
 512                         if ( keyd_pressed[KEY_LSHIFT] || keyd_pressed[KEY_RSHIFT])
 513                                 keycode |= KEY_SHIFTED;
 514                         if ( keyd_pressed[KEY_LALT] || keyd_pressed[KEY_RALT])
 515                                 keycode |= KEY_ALTED;
 516                         if ( keyd_pressed[KEY_LCTRL] || keyd_pressed[KEY_RCTRL])
 517                                 keycode |= KEY_CTRLED;
 518                         if ( keyd_pressed[KEY_DELETE] )
 519                                 keycode |= KEY_DEBUGGED;
 520                         if ( keyd_pressed[KEY_LMETA] || keyd_pressed[KEY_RMETA])
 521                                 keycode |= KEY_METAED;
 522
 523                         temp = key_data.keytail+1;
 524                         if ( temp >= KEY_BUFFER_SIZE ) temp=0;
 525                         if (temp!=key_data.keyhead)     {
 526                                 key_data.keybuffer[key_data.keytail] = keycode;
 527                                 key_data.time_pressed[key_data.keytail] = keyd_time_when_last_pressed;
 528                                 key_data.keytail = temp;
 529                         }
 530                 }
 531                 key->last_state = state;
 532         }
 533 }
 534
 535 void key_close()
 536 {
 537         int i;
 538
 539         for (i = 0; i < 256; i++)
 540                 if (key_binding_list[i])
 541                         d_free(key_binding_list[i]);
 542
 543  Installed = 0;
 544 }
 545
 546 void key_init()
 547 {
 548   int i;
 549
 550   if (Installed) return;
 551
 552   Installed=1;
 553
 554   keyd_time_when_last_pressed = timer_get_fixed_seconds();
 555   keyd_buffer_type = 1;
 556   keyd_repeat = 1;
 557
 558   for(i=0; i<256; i++)
 559      key_text[i] = key_properties[i].key_text;
 560
 561         cmd_addcommand("bind", key_cmd_bind);
 562         cmd_addcommand("unbind", key_cmd_unbind);
 563
 564   // Clear the keyboard array
 565   key_flush();
 566   atexit(key_close);
 567 }
 568
 569 void key_flush()
 570 {
 571         int i;
 572         fix curtime;
 573
 574         if (!Installed)
 575                 key_init();
 576
 577         key_data.keyhead = key_data.keytail = 0;
 578
 579         //Clear the keyboard buffer
 580         for (i=0; i<KEY_BUFFER_SIZE; i++ )      {
 581                 key_data.keybuffer[i] = 0;
 582                 key_data.time_pressed[i] = 0;
 583         }
 584
 585 //use gettimeofday here:
 586         curtime = timer_get_fixed_seconds();
 587
 588         for (i=0; i<256; i++ )  {
 589                 keyd_pressed[i] = 0;
 590                 key_data.keys[i].state = 1;
 591                 key_data.keys[i].last_state = 0;
 592                 key_data.keys[i].timewentdown = curtime;
 593                 key_data.keys[i].downcount=0;
 594                 key_data.keys[i].upcount=0;
 595                 key_data.keys[i].timehelddown = 0;
 596                 key_data.keys[i].counter = 0;
 597         }
 598 }
 599
 600 int add_one(int n)
 601 {
 602  n++;
 603  if ( n >= KEY_BUFFER_SIZE ) n=0;
 604  return n;
 605 }
 606
 607 int key_checkch()
 608 {
 609         int is_one_waiting = 0;
 610         event_poll();
 611         if (key_data.keytail!=key_data.keyhead)
 612                 is_one_waiting = 1;
 613         return is_one_waiting;
 614 }
 615
 616 int key_inkey()
 617 {
 618         int key = 0;
 619         if (!Installed)
 620                 key_init();
 621         event_poll();
 622         if (key_data.keytail!=key_data.keyhead) {
 623                 key = key_data.keybuffer[key_data.keyhead];
 624                 key_data.keyhead = add_one(key_data.keyhead);
 625         }
 626 //added 9/3/98 by Matt Mueller to free cpu time instead of hogging during menus and such
 627         else timer_delay(1);
 628 //end addition - Matt Mueller
 629
 630         return key;
 631 }
 632
 633 int key_inkey_time(fix * time)
 634 {
 635         int key = 0;
 636
 637         if (!Installed)
 638                 key_init();
 639         event_poll();
 640         if (key_data.keytail!=key_data.keyhead) {
 641                 key = key_data.keybuffer[key_data.keyhead];
 642                 *time = key_data.time_pressed[key_data.keyhead];
 643                 key_data.keyhead = add_one(key_data.keyhead);
 644         }
 645         return key;
 646 }
 647
 648 int key_peekkey()
 649 {
 650         int key = 0;
 651         event_poll();
 652         if (key_data.keytail!=key_data.keyhead)
 653                 key = key_data.keybuffer[key_data.keyhead];
 654
 655         return key;
 656 }
 657
 658 int key_getch()
 659 {
 660         int dummy=0;
 661
 662         if (!Installed)
 663                 return 0;
 664 //              return getch();
 665
 666         while (!key_checkch())
 667                 dummy++;
 668         return key_inkey();
 669 }
 670
 671 unsigned int key_get_shift_status()
 672 {
 673         unsigned int shift_status = 0;
 674
 675         if ( keyd_pressed[KEY_LSHIFT] || keyd_pressed[KEY_RSHIFT] )
 676                 shift_status |= KEY_SHIFTED;
 677
 678         if ( keyd_pressed[KEY_LALT] || keyd_pressed[KEY_RALT] )
 679                 shift_status |= KEY_ALTED;
 680
 681         if ( keyd_pressed[KEY_LCTRL] || keyd_pressed[KEY_RCTRL] )
 682                 shift_status |= KEY_CTRLED;
 683
 684         if ( keyd_pressed[KEY_LMETA] || keyd_pressed[KEY_RMETA] )
 685                 shift_status |= KEY_METAED;
 686
 687 #ifndef NDEBUG
 688         if (keyd_pressed[KEY_DELETE])
 689                 shift_status |=KEY_DEBUGGED;
 690 #endif
 691
 692         return shift_status;
 693 }
 694
 695 // Returns the number of seconds this key has been down since last call.
 696 fix key_down_time(int scancode)
 697 {
 698         fix time_down, time;
 699
 700         event_poll();
 701         if ((scancode<0)|| (scancode>255)) return 0;
 702
 703         if (!keyd_pressed[scancode]) {
 704                 time_down = key_data.keys[scancode].timehelddown;
 705                 key_data.keys[scancode].timehelddown = 0;
 706         } else {
 707                 time = timer_get_fixed_seconds();
 708                 time_down = time - key_data.keys[scancode].timewentdown;
 709                 key_data.keys[scancode].timewentdown = time;
 710         }
 711
 712         return time_down;
 713 }
 714
 715 unsigned int key_down_count(int scancode)
 716 {
 717         int n;
 718         event_poll();
 719         if ((scancode<0)|| (scancode>255)) return 0;
 720
 721         n = key_data.keys[scancode].downcount;
 722         key_data.keys[scancode].downcount = 0;
 723
 724         return n;
 725 }
 726
 727 unsigned int key_up_count(int scancode)
 728 {
 729         int n;
 730         event_poll();
 731         if ((scancode<0)|| (scancode>255)) return 0;
 732
 733         n = key_data.keys[scancode].upcount;
 734         key_data.keys[scancode].upcount = 0;
 735
 736         return n;
 737 }