drivers/accessibility/speakup/varhandlers.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/ctype.h>
   3 #include "spk_types.h"
   4 #include "spk_priv.h"
   5 #include "speakup.h"
   6
   7 static struct st_var_header var_headers[] = {
   8         { "version", VERSION, VAR_PROC, NULL, NULL },
   9         { "synth_name", SYNTH, VAR_PROC, NULL, NULL },
  10         { "keymap", KEYMAP, VAR_PROC, NULL, NULL },
  11         { "silent", SILENT, VAR_PROC, NULL, NULL },
  12         { "punc_some", PUNC_SOME, VAR_PROC, NULL, NULL },
  13         { "punc_most", PUNC_MOST, VAR_PROC, NULL, NULL },
  14         { "punc_all", PUNC_ALL, VAR_PROC, NULL, NULL },
  15         { "delimiters", DELIM, VAR_PROC, NULL, NULL },
  16         { "repeats", REPEATS, VAR_PROC, NULL, NULL },
  17         { "ex_num", EXNUMBER, VAR_PROC, NULL, NULL },
  18         { "characters", CHARS, VAR_PROC, NULL, NULL },
  19         { "synth_direct", SYNTH_DIRECT, VAR_PROC, NULL, NULL },
  20         { "caps_start", CAPS_START, VAR_STRING, spk_str_caps_start, NULL },
  21         { "caps_stop", CAPS_STOP, VAR_STRING, spk_str_caps_stop, NULL },
  22         { "delay_time", DELAY, VAR_TIME, NULL, NULL },
  23         { "trigger_time", TRIGGER, VAR_TIME, NULL, NULL },
  24         { "jiffy_delta", JIFFY, VAR_TIME, NULL, NULL },
  25         { "full_time", FULL, VAR_TIME, NULL, NULL },
  26         { "flush_time", FLUSH, VAR_TIME, NULL, NULL },
  27         { "spell_delay", SPELL_DELAY, VAR_NUM, &spk_spell_delay, NULL },
  28         { "bleeps", BLEEPS, VAR_NUM, &spk_bleeps, NULL },
  29         { "attrib_bleep", ATTRIB_BLEEP, VAR_NUM, &spk_attrib_bleep, NULL },
  30         { "bleep_time", BLEEP_TIME, VAR_TIME, &spk_bleep_time, NULL },
  31         { "cursor_time", CURSOR_TIME, VAR_TIME, NULL, NULL },
  32         { "punc_level", PUNC_LEVEL, VAR_NUM, &spk_punc_level, NULL },
  33         { "reading_punc", READING_PUNC, VAR_NUM, &spk_reading_punc, NULL },
  34         { "say_control", SAY_CONTROL, VAR_NUM, &spk_say_ctrl, NULL },
  35         { "say_word_ctl", SAY_WORD_CTL, VAR_NUM, &spk_say_word_ctl, NULL },
  36         { "no_interrupt", NO_INTERRUPT, VAR_NUM, &spk_no_intr, NULL },
  37         { "key_echo", KEY_ECHO, VAR_NUM, &spk_key_echo, NULL },
  38         { "bell_pos", BELL_POS, VAR_NUM, &spk_bell_pos, NULL },
  39         { "rate", RATE, VAR_NUM, NULL, NULL },
  40         { "pitch", PITCH, VAR_NUM, NULL, NULL },
  41         { "inflection", INFLECTION, VAR_NUM, NULL, NULL },
  42         { "vol", VOL, VAR_NUM, NULL, NULL },
  43         { "tone", TONE, VAR_NUM, NULL, NULL },
  44         { "punct", PUNCT, VAR_NUM, NULL, NULL   },
  45         { "voice", VOICE, VAR_NUM, NULL, NULL },
  46         { "freq", FREQUENCY, VAR_NUM, NULL, NULL },
  47         { "lang", LANG, VAR_NUM, NULL, NULL },
  48         { "chartab", CHARTAB, VAR_PROC, NULL, NULL },
  49         { "direct", DIRECT, VAR_NUM, NULL, NULL },
  50         { "pause", PAUSE, VAR_STRING, spk_str_pause, NULL },
  51 };
  52
  53 static struct st_var_header *var_ptrs[MAXVARS] = { NULL, NULL, NULL };
  54
  55 static struct punc_var_t punc_vars[] = {
  56         { PUNC_SOME, 1 },
  57         { PUNC_MOST, 2 },
  58         { PUNC_ALL, 3 },
  59         { DELIM, 4 },
  60         { REPEATS, 5 },
  61         { EXNUMBER, 6 },
  62         { -1, -1 },
  63 };
  64
  65 int spk_chartab_get_value(char *keyword)
  66 {
  67         int value = 0;
  68
  69         if (!strcmp(keyword, "ALPHA"))
  70                 value = ALPHA;
  71         else if (!strcmp(keyword, "B_CTL"))
  72                 value = B_CTL;
  73         else if (!strcmp(keyword, "WDLM"))
  74                 value = WDLM;
  75         else if (!strcmp(keyword, "A_PUNC"))
  76                 value = A_PUNC;
  77         else if (!strcmp(keyword, "PUNC"))
  78                 value = PUNC;
  79         else if (!strcmp(keyword, "NUM"))
  80                 value = NUM;
  81         else if (!strcmp(keyword, "A_CAP"))
  82                 value = A_CAP;
  83         else if (!strcmp(keyword, "B_CAPSYM"))
  84                 value = B_CAPSYM;
  85         else if (!strcmp(keyword, "B_SYM"))
  86                 value = B_SYM;
  87         return value;
  88 }
  89
  90 void speakup_register_var(struct var_t *var)
  91 {
  92         static char nothing[2] = "\0";
  93         int i;
  94         struct st_var_header *p_header;
  95
  96         BUG_ON(!var || var->var_id < 0 || var->var_id >= MAXVARS);
  97         if (!var_ptrs[0]) {
  98                 for (i = 0; i < MAXVARS; i++) {
  99                         p_header = &var_headers[i];
 100                         var_ptrs[p_header->var_id] = p_header;
 101                         p_header->data = NULL;
 102                 }
 103         }
 104         p_header = var_ptrs[var->var_id];
 105         if (p_header->data)
 106                 return;
 107         p_header->data = var;
 108         switch (p_header->var_type) {
 109         case VAR_STRING:
 110                 spk_set_string_var(nothing, p_header, 0);
 111                 break;
 112         case VAR_NUM:
 113         case VAR_TIME:
 114                 spk_set_num_var(0, p_header, E_DEFAULT);
 115                 break;
 116         default:
 117                 break;
 118         }
 119 }
 120
 121 void speakup_unregister_var(enum var_id_t var_id)
 122 {
 123         struct st_var_header *p_header;
 124
 125         BUG_ON(var_id < 0 || var_id >= MAXVARS);
 126         p_header = var_ptrs[var_id];
 127         p_header->data = NULL;
 128 }
 129
 130 struct st_var_header *spk_get_var_header(enum var_id_t var_id)
 131 {
 132         struct st_var_header *p_header;
 133
 134         if (var_id < 0 || var_id >= MAXVARS)
 135                 return NULL;
 136         p_header = var_ptrs[var_id];
 137         if (!p_header->data)
 138                 return NULL;
 139         return p_header;
 140 }
 141
 142 struct st_var_header *spk_var_header_by_name(const char *name)
 143 {
 144         int i;
 145
 146         if (!name)
 147                 return NULL;
 148
 149         for (i = 0; i < MAXVARS; i++) {
 150                 if (strcmp(name, var_ptrs[i]->name) == 0)
 151                         return var_ptrs[i];
 152         }
 153         return NULL;
 154 }
 155
 156 struct var_t *spk_get_var(enum var_id_t var_id)
 157 {
 158         BUG_ON(var_id < 0 || var_id >= MAXVARS);
 159         BUG_ON(!var_ptrs[var_id]);
 160         return var_ptrs[var_id]->data;
 161 }
 162 EXPORT_SYMBOL_GPL(spk_get_var);
 163
 164 struct punc_var_t *spk_get_punc_var(enum var_id_t var_id)
 165 {
 166         struct punc_var_t *rv = NULL;
 167         struct punc_var_t *where;
 168
 169         where = punc_vars;
 170         while ((where->var_id != -1) && (!rv)) {
 171                 if (where->var_id == var_id)
 172                         rv = where;
 173                 else
 174                         where++;
 175         }
 176         return rv;
 177 }
 178
 179 /* handlers for setting vars */
 180 int spk_set_num_var(int input, struct st_var_header *var, int how)
 181 {
 182         int val;
 183         int *p_val = var->p_val;
 184         char buf[32];
 185         char *cp;
 186         struct var_t *var_data = var->data;
 187
 188         if (!var_data)
 189                 return -ENODATA;
 190
 191         val = var_data->u.n.value;
 192         switch (how) {
 193         case E_NEW_DEFAULT:
 194                 if (input < var_data->u.n.low || input > var_data->u.n.high)
 195                         return -ERANGE;
 196                 var_data->u.n.default_val = input;
 197                 return 0;
 198         case E_DEFAULT:
 199                 val = var_data->u.n.default_val;
 200                 break;
 201         case E_SET:
 202                 val = input;
 203                 break;
 204         case E_INC:
 205                 val += input;
 206                 break;
 207         case E_DEC:
 208                 val -= input;
 209                 break;
 210         }
 211
 212         if (val < var_data->u.n.low || val > var_data->u.n.high)
 213                 return -ERANGE;
 214
 215         var_data->u.n.value = val;
 216         if (var->var_type == VAR_TIME && p_val) {
 217                 *p_val = msecs_to_jiffies(val);
 218                 return 0;
 219         }
 220         if (p_val)
 221                 *p_val = val;
 222         if (var->var_id == PUNC_LEVEL) {
 223                 spk_punc_mask = spk_punc_masks[val];
 224                 return 0;
 225         }
 226         if (var_data->u.n.multiplier != 0)
 227                 val *= var_data->u.n.multiplier;
 228         val += var_data->u.n.offset;
 229         if (var->var_id < FIRST_SYNTH_VAR || !synth)
 230                 return 0;
 231         if (synth->synth_adjust)
 232                 return synth->synth_adjust(var);
 233
 234         if (!var_data->u.n.synth_fmt)
 235                 return 0;
 236         if (var->var_id == PITCH)
 237                 cp = spk_pitch_buff;
 238         else
 239                 cp = buf;
 240         if (!var_data->u.n.out_str)
 241                 sprintf(cp, var_data->u.n.synth_fmt, (int)val);
 242         else
 243                 sprintf(cp, var_data->u.n.synth_fmt,
 244                         var_data->u.n.out_str[val]);
 245         synth_printf("%s", cp);
 246         return 0;
 247 }
 248
 249 int spk_set_string_var(const char *page, struct st_var_header *var, int len)
 250 {
 251         struct var_t *var_data = var->data;
 252
 253         if (!var_data)
 254                 return -ENODATA;
 255         if (len > MAXVARLEN)
 256                 return -E2BIG;
 257         if (!len) {
 258                 if (!var_data->u.s.default_val)
 259                         return 0;
 260                 if (!var->p_val)
 261                         var->p_val = var_data->u.s.default_val;
 262                 if (var->p_val != var_data->u.s.default_val)
 263                         strcpy((char *)var->p_val, var_data->u.s.default_val);
 264                 return -ERESTART;
 265         } else if (var->p_val) {
 266                 strcpy((char *)var->p_val, page);
 267         } else {
 268                 return -E2BIG;
 269         }
 270         return 0;
 271 }
 272
 273 /*
 274  * spk_set_mask_bits sets or clears the punc/delim/repeat bits,
 275  * if input is null uses the defaults.
 276  * values for how: 0 clears bits of chars supplied,
 277  * 1 clears allk, 2 sets bits for chars
 278  */
 279 int spk_set_mask_bits(const char *input, const int which, const int how)
 280 {
 281         u_char *cp;
 282         short mask = spk_punc_info[which].mask;
 283
 284         if (how & 1) {
 285                 for (cp = (u_char *)spk_punc_info[3].value; *cp; cp++)
 286                         spk_chartab[*cp] &= ~mask;
 287         }
 288         cp = (u_char *)input;
 289         if (!cp) {
 290                 cp = spk_punc_info[which].value;
 291         } else {
 292                 for (; *cp; cp++) {
 293                         if (*cp < SPACE)
 294                                 break;
 295                         if (mask < PUNC) {
 296                                 if (!(spk_chartab[*cp] & PUNC))
 297                                         break;
 298                         } else if (spk_chartab[*cp] & B_NUM) {
 299                                 break;
 300                         }
 301                 }
 302                 if (*cp)
 303                         return -EINVAL;
 304                 cp = (u_char *)input;
 305         }
 306         if (how & 2) {
 307                 for (; *cp; cp++)
 308                         if (*cp > SPACE)
 309                                 spk_chartab[*cp] |= mask;
 310         } else {
 311                 for (; *cp; cp++)
 312                         if (*cp > SPACE)
 313                                 spk_chartab[*cp] &= ~mask;
 314         }
 315         return 0;
 316 }
 317
 318 char *spk_strlwr(char *s)
 319 {
 320         char *p;
 321
 322         if (!s)
 323                 return NULL;
 324
 325         for (p = s; *p; p++)
 326                 *p = tolower(*p);
 327         return s;
 328 }
 329
 330 char *spk_s2uchar(char *start, char *dest)
 331 {
 332         int val;
 333
 334         /* Do not replace with kstrtoul: here we need start to be updated */
 335         val = simple_strtoul(skip_spaces(start), &start, 10);
 336         if (*start == ',')
 337                 start++;
 338         *dest = (u_char)val;
 339         return start;
 340 }