drivers/tty/keymaps/genmap.c

   1 /*      genmap - output binary keymap                   Author: Marcus Hampel
   2  */
   3 #include <sys/types.h>
   4 #ifdef __minix
   5 #include <minix/keymap.h>
   6 #else
   7 #include "../../../include/minix/keymap.h"
   8 #endif
   9 #include <fcntl.h>
  10 #include <unistd.h>
  11 #include <stdlib.h>
  12 #include <string.h>
  13 #include <errno.h>
  14
  15 /*
  16  * if we crosscompile those might not be defined,
  17  */
  18 #ifndef u16_t
  19 #include <stdint.h>
  20 typedef uint16_t u16_t;
  21 #endif
  22
  23 #ifndef u8_t
  24 #include <stdint.h>
  25 typedef uint8_t u8_t;
  26 #endif
  27
  28 u16_t keymap[NR_SCAN_CODES * MAP_COLS] = {
  29 #include KEYSRC
  30 };
  31
  32 u8_t comprmap[4 + NR_SCAN_CODES * MAP_COLS * 9/8 * 2 + 1];
  33
  34 void tell(const char *s)
  35 {
  36   write(2, s, strlen(s));
  37 }
  38
  39 int main(void)
  40 {
  41   u8_t *cm, *fb;
  42   u16_t *km;
  43   int n;
  44
  45   /* Compress the keymap. */
  46   memcpy(comprmap, KEY_MAGIC, 4);
  47   cm = comprmap + 4;
  48   n = 8;
  49   for (km = keymap; km < keymap + NR_SCAN_CODES * MAP_COLS; km++) {
  50         if (n == 8) {
  51                 /* Allocate a new flag byte. */
  52                 fb = cm;
  53                 *cm++ = 0;
  54                 n= 0;
  55         }
  56         *cm++ = (*km & 0x00FF);         /* Low byte. */
  57         if (*km & 0xFF00) {
  58                 *cm++ = (*km >> 8);     /* High byte only when set. */
  59                 *fb |= (1 << n);        /* Set a flag if so. */
  60         }
  61         n++;
  62   }
  63
  64   /* Don't store trailing zeros. */
  65   while (cm > comprmap && cm[-1] == 0) cm--;
  66
  67   /* Emit the compressed keymap. */
  68   if (write(1, comprmap, cm - comprmap) < 0) {
  69         int err = errno;
  70
  71         tell("genmap: ");
  72         tell(strerror(err));
  73         tell("\n");
  74         exit(1);
  75   }
  76   exit(0);
  77 }