drivers/accessibility/speakup/genmap.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /* genmap.c
   3  * originally written by: Kirk Reiser.
   4  *
   5  ** Copyright (C) 2002  Kirk Reiser.
   6  *  Copyright (C) 2003  David Borowski.
   7  */
   8
   9 #include <stdlib.h>
  10 #include <stdio.h>
  11 #include <libgen.h>
  12 #include <string.h>
  13 #include <ctype.h>
  14 #include "utils.h"
  15
  16 struct st_key_init {
  17         char *name;
  18         int value, shift;
  19 };
  20
  21 static unsigned char key_data[MAXKEYVAL][16], *kp;
  22
  23 #include "mapdata.h"
  24
  25 static const char delims[] = "\t\n ";
  26 static char *cp;
  27 static int map_ver = 119; /* an arbitrary number so speakup can check */
  28 static int shift_table[17];
  29 static int max_states = 1, flags;
  30 /* flags reserved for later, maybe for individual console maps */
  31
  32 static int get_shift_value(int state)
  33 {
  34         int i;
  35
  36         for (i = 0; shift_table[i] != state; i++) {
  37                 if (shift_table[i] == -1) {
  38                         if (i >= 16)
  39                                 oops("too many shift states", NULL);
  40                         shift_table[i] = state;
  41                         max_states = i+1;
  42                 break;
  43         }
  44         }
  45         return i;
  46 }
  47
  48 int
  49 main(int argc, char *argv[])
  50 {
  51         int value, shift_state, i, spk_val = 0, lock_val = 0;
  52         int max_key_used = 0, num_keys_used = 0;
  53         struct st_key *this;
  54         struct st_key_init *p_init;
  55         char buffer[256];
  56
  57         bzero(key_table, sizeof(key_table));
  58         bzero(key_data, sizeof(key_data));
  59
  60         shift_table[0] = 0;
  61         for (i = 1; i <= 16; i++)
  62                 shift_table[i] = -1;
  63
  64         if (argc < 2) {
  65                 fputs("usage: genmap filename\n", stderr);
  66                 exit(1);
  67         }
  68
  69         for (p_init = init_key_data; p_init->name[0] != '.'; p_init++)
  70                 add_key(p_init->name, p_init->value, p_init->shift);
  71
  72         open_input(NULL, argv[1]);
  73         while (fgets(buffer, sizeof(buffer), infile)) {
  74                 lc++;
  75                 value = shift_state = 0;
  76
  77                 cp = strtok(buffer, delims);
  78                 if (*cp == '#')
  79                         continue;
  80
  81                 while (cp) {
  82                         if (*cp == '=')
  83                                 break;
  84                         this = find_key(cp);
  85                         if (this == NULL)
  86                                 oops("unknown key/modifier", cp);
  87                         if (this->shift == is_shift) {
  88                                 if (value)
  89                                         oops("modifiers must come first", cp);
  90                                 shift_state += this->value;
  91                         } else if (this->shift == is_input)
  92                                 value = this->value;
  93                         else
  94                                 oops("bad modifier or key", cp);
  95                         cp = strtok(0, delims);
  96                 }
  97                 if (!cp)
  98                         oops("no = found", NULL);
  99
 100                 cp = strtok(0, delims);
 101                 if (!cp)
 102                         oops("no speakup function after =", NULL);
 103
 104                 this = find_key(cp);
 105                 if (this == NULL || this->shift != is_spk)
 106                         oops("invalid speakup function", cp);
 107
 108                 i = get_shift_value(shift_state);
 109                 if (key_data[value][i]) {
 110                         while (--cp > buffer)
 111                                 if (!*cp)
 112                                         *cp = ' ';
 113                         oops("two functions on same key combination", cp);
 114                 }
 115                 key_data[value][i] = (char)this->value;
 116                 if (value > max_key_used)
 117                         max_key_used = value;
 118         }
 119         fclose(infile);
 120
 121         this = find_key("spk_key");
 122         if (this)
 123                 spk_val = this->value;
 124
 125         this = find_key("spk_lock");
 126         if (this)
 127                 lock_val = this->value;
 128
 129         for (lc = 1; lc <= max_key_used; lc++) {
 130                 kp = key_data[lc];
 131                 if (!memcmp(key_data[0], kp, 16))
 132                         continue;
 133                 num_keys_used++;
 134                 for (i = 0; i < max_states; i++) {
 135                         if (kp[i] != spk_val && kp[i] != lock_val)
 136                                 continue;
 137                         shift_state = shift_table[i];
 138                         if (shift_state&16)
 139                                 continue;
 140                         shift_state = get_shift_value(shift_state+16);
 141                         kp[shift_state] = kp[i];
 142                         /* fill in so we can process the key up, as spk bit will be set */
 143                 }
 144         }
 145
 146         printf("\t%d, %d, %d,\n\t", map_ver, num_keys_used, max_states);
 147         for (i = 0; i < max_states; i++)
 148                 printf("%d, ", shift_table[i]);
 149         printf("%d,", flags);
 150         for (lc = 1; lc <= max_key_used; lc++) {
 151                 kp = key_data[lc];
 152                 if (!memcmp(key_data[0], kp, 16))
 153                         continue;
 154                 printf("\n\t%d,", lc);
 155                 for (i = 0; i < max_states; i++)
 156                         printf(" %d,", (unsigned int)kp[i]);
 157         }
 158         printf("\n\t0, %d\n", map_ver);
 159
 160         exit(0);
 161 }