drivers/staging/speakup/i18n.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Internationalization implementation.  Includes definitions of English
   3  * string arrays, and the i18n pointer.
   4  */
   5
   6 #include <linux/slab.h>         /* For kmalloc. */
   7 #include <linux/ctype.h>
   8 #include <linux/module.h>
   9 #include <linux/string.h>
  10 #include "speakup.h"
  11 #include "spk_priv.h"
  12
  13 static char *speakup_msgs[MSG_LAST_INDEX];
  14 static char *speakup_default_msgs[MSG_LAST_INDEX] = {
  15         [MSG_BLANK] = "blank",
  16         [MSG_IAM_ALIVE] = "I'm aLive!",
  17         [MSG_YOU_KILLED_SPEAKUP] = "You killed speakup!",
  18         [MSG_HEY_THATS_BETTER] = "hey. That's better!",
  19         [MSG_YOU_TURNED_ME_OFF] = "You turned me off!",
  20         [MSG_PARKED] = "parked!",
  21         [MSG_UNPARKED] = "unparked!",
  22         [MSG_MARK] = "mark",
  23         [MSG_CUT] = "cut",
  24         [MSG_MARK_CLEARED] = "mark, cleared",
  25         [MSG_PASTE] = "paste",
  26         [MSG_BRIGHT] = "bright",
  27         [MSG_ON_BLINKING] = "on blinking",
  28         [MSG_OFF] = "off",
  29         [MSG_ON] = "on",
  30         [MSG_NO_WINDOW] = "no window",
  31         [MSG_CURSORING_OFF] = "cursoring off",
  32         [MSG_CURSORING_ON] = "cursoring on",
  33         [MSG_HIGHLIGHT_TRACKING] = "highlight tracking",
  34         [MSG_READ_WINDOW] = "read windo",
  35         [MSG_READ_ALL] = "read all",
  36         [MSG_EDIT_DONE] = "edit done",
  37         [MSG_WINDOW_ALREADY_SET] = "window already set, clear then reset",
  38         [MSG_END_BEFORE_START] = "error end before start",
  39         [MSG_WINDOW_CLEARED] = "window cleared",
  40         [MSG_WINDOW_SILENCED] = "window silenced",
  41         [MSG_WINDOW_SILENCE_DISABLED] = "window silence disabled",
  42         [MSG_ERROR] = "error",
  43         [MSG_GOTO_CANCELED] = "goto canceled",
  44         [MSG_GOTO] = "go to?",
  45         [MSG_LEAVING_HELP] = "leaving help",
  46         [MSG_IS_UNASSIGNED] = "is unassigned",
  47         [MSG_HELP_INFO] =
  48         "press space to exit, up or down to scroll, or a letter to go to a command",
  49         [MSG_EDGE_TOP] = "top,",
  50         [MSG_EDGE_BOTTOM] = "bottom,",
  51         [MSG_EDGE_LEFT] = "left,",
  52         [MSG_EDGE_RIGHT] = "right,",
  53         [MSG_NUMBER] = "number",
  54         [MSG_SPACE] = "space",
  55         [MSG_START] = "start",
  56         [MSG_END] = "end",
  57         [MSG_CTRL] = "control-",
  58         [MSG_DISJUNCTION] = "or",
  59
  60 /* Messages with embedded format specifiers. */
  61         [MSG_POS_INFO] = "line %ld, col %ld, t t y %d",
  62         [MSG_CHAR_INFO] = "hex %02x, decimal %d",
  63         [MSG_REPEAT_DESC] = "times %d .",
  64         [MSG_REPEAT_DESC2] = "repeated %d .",
  65         [MSG_WINDOW_LINE] = "window is line %d",
  66         [MSG_WINDOW_BOUNDARY] = "%s at line %d, column %d",
  67         [MSG_EDIT_PROMPT] = "edit  %s, press space when done",
  68         [MSG_NO_COMMAND] = "no commands for %c",
  69         [MSG_KEYDESC] = "is %s",
  70
  71         /* Control keys. */
  72         /* Most of these duplicate the entries in state names. */
  73         [MSG_CTL_SHIFT] = "shift",
  74         [MSG_CTL_ALTGR] = "altgr",
  75         [MSG_CTL_CONTROL] = "control",
  76         [MSG_CTL_ALT] = "alt",
  77         [MSG_CTL_LSHIFT] = "l shift",
  78         [MSG_CTL_SPEAKUP] = "speakup",
  79         [MSG_CTL_LCONTROL] = "l control",
  80         [MSG_CTL_RCONTROL] = "r control",
  81         [MSG_CTL_CAPSSHIFT] = "caps shift",
  82
  83         /* Color names. */
  84         [MSG_COLOR_BLACK] = "black",
  85         [MSG_COLOR_BLUE] = "blue",
  86         [MSG_COLOR_GREEN] = "green",
  87         [MSG_COLOR_CYAN] = "cyan",
  88         [MSG_COLOR_RED] = "red",
  89         [MSG_COLOR_MAGENTA] = "magenta",
  90         [MSG_COLOR_YELLOW] = "yellow",
  91         [MSG_COLOR_WHITE] = "white",
  92         [MSG_COLOR_GREY] = "grey",
  93
  94         /* Names of key states. */
  95         [MSG_STATE_DOUBLE] = "double",
  96         [MSG_STATE_SPEAKUP] = "speakup",
  97         [MSG_STATE_ALT] = "alt",
  98         [MSG_STATE_CONTROL] = "ctrl",
  99         [MSG_STATE_ALTGR] = "altgr",
 100         [MSG_STATE_SHIFT] = "shift",
 101
 102         /* Key names. */
 103         [MSG_KEYNAME_ESC] = "escape",
 104         [MSG_KEYNAME_1] = "1",
 105         [MSG_KEYNAME_2] = "2",
 106         [MSG_KEYNAME_3] = "3",
 107         [MSG_KEYNAME_4] = "4",
 108         [MSG_KEYNAME_5] = "5",
 109         [MSG_KEYNAME_6] = "6",
 110         [MSG_KEYNAME_7] = "7",
 111         [MSG_KEYNAME_8] = "8",
 112         [MSG_KEYNAME_9] = "9",
 113         [MSG_KEYNAME_0] = "0",
 114         [MSG_KEYNAME_DASH] = "minus",
 115         [MSG_KEYNAME_EQUAL] = "equal",
 116         [MSG_KEYNAME_BS] = "back space",
 117         [MSG_KEYNAME_TAB] = "tab",
 118         [MSG_KEYNAME_Q] = "q",
 119         [MSG_KEYNAME_W] = "w",
 120         [MSG_KEYNAME_E] = "e",
 121         [MSG_KEYNAME_R] = "r",
 122         [MSG_KEYNAME_T] = "t",
 123         [MSG_KEYNAME_Y] = "y",
 124         [MSG_KEYNAME_U] = "u",
 125         [MSG_KEYNAME_I] = "i",
 126         [MSG_KEYNAME_O] = "o",
 127         [MSG_KEYNAME_P] = "p",
 128         [MSG_KEYNAME_LEFTBRACE] = "left brace",
 129         [MSG_KEYNAME_RIGHTBRACE] = "right brace",
 130         [MSG_KEYNAME_ENTER] = "enter",
 131         [MSG_KEYNAME_LEFTCTRL] = "left control",
 132         [MSG_KEYNAME_A] = "a",
 133         [MSG_KEYNAME_S] = "s",
 134         [MSG_KEYNAME_D] = "d",
 135         [MSG_KEYNAME_F] = "f",
 136         [MSG_KEYNAME_G] = "g",
 137         [MSG_KEYNAME_H] = "h",
 138         [MSG_KEYNAME_J] = "j",
 139         [MSG_KEYNAME_K] = "k",
 140         [MSG_KEYNAME_L] = "l",
 141         [MSG_KEYNAME_SEMICOLON] = "semicolon",
 142         [MSG_KEYNAME_SINGLEQUOTE] = "apostrophe",
 143         [MSG_KEYNAME_GRAVE] = "accent",
 144         [MSG_KEYNAME_LEFTSHFT] = "left shift",
 145         [MSG_KEYNAME_BACKSLASH] = "back slash",
 146         [MSG_KEYNAME_Z] = "z",
 147         [MSG_KEYNAME_X] = "x",
 148         [MSG_KEYNAME_C] = "c",
 149         [MSG_KEYNAME_V] = "v",
 150         [MSG_KEYNAME_B] = "b",
 151         [MSG_KEYNAME_N] = "n",
 152         [MSG_KEYNAME_M] = "m",
 153         [MSG_KEYNAME_COMMA] = "comma",
 154         [MSG_KEYNAME_DOT] = "dot",
 155         [MSG_KEYNAME_SLASH] = "slash",
 156         [MSG_KEYNAME_RIGHTSHFT] = "right shift",
 157         [MSG_KEYNAME_KPSTAR] = "keypad asterisk",
 158         [MSG_KEYNAME_LEFTALT] = "left alt",
 159         [MSG_KEYNAME_SPACE] = "space",
 160         [MSG_KEYNAME_CAPSLOCK] = "caps lock",
 161         [MSG_KEYNAME_F1] = "f1",
 162         [MSG_KEYNAME_F2] = "f2",
 163         [MSG_KEYNAME_F3] = "f3",
 164         [MSG_KEYNAME_F4] = "f4",
 165         [MSG_KEYNAME_F5] = "f5",
 166         [MSG_KEYNAME_F6] = "f6",
 167         [MSG_KEYNAME_F7] = "f7",
 168         [MSG_KEYNAME_F8] = "f8",
 169         [MSG_KEYNAME_F9] = "f9",
 170         [MSG_KEYNAME_F10] = "f10",
 171         [MSG_KEYNAME_NUMLOCK] = "num lock",
 172         [MSG_KEYNAME_SCROLLLOCK] = "scroll lock",
 173         [MSG_KEYNAME_KP7] = "keypad 7",
 174         [MSG_KEYNAME_KP8] = "keypad 8",
 175         [MSG_KEYNAME_KP9] = "keypad 9",
 176         [MSG_KEYNAME_KPMINUS] = "keypad minus",
 177         [MSG_KEYNAME_KP4] = "keypad 4",
 178         [MSG_KEYNAME_KP5] = "keypad 5",
 179         [MSG_KEYNAME_KP6] = "keypad 6",
 180         [MSG_KEYNAME_KPPLUS] = "keypad plus",
 181         [MSG_KEYNAME_KP1] = "keypad 1",
 182         [MSG_KEYNAME_KP2] = "keypad 2",
 183         [MSG_KEYNAME_KP3] = "keypad 3",
 184         [MSG_KEYNAME_KP0] = "keypad 0",
 185         [MSG_KEYNAME_KPDOT] = "keypad dot",
 186         [MSG_KEYNAME_103RD] = "103rd",
 187         [MSG_KEYNAME_F13] = "f13",
 188         [MSG_KEYNAME_102ND] = "102nd",
 189         [MSG_KEYNAME_F11] = "f11",
 190         [MSG_KEYNAME_F12] = "f12",
 191         [MSG_KEYNAME_F14] = "f14",
 192         [MSG_KEYNAME_F15] = "f15",
 193         [MSG_KEYNAME_F16] = "f16",
 194         [MSG_KEYNAME_F17] = "f17",
 195         [MSG_KEYNAME_F18] = "f18",
 196         [MSG_KEYNAME_F19] = "f19",
 197         [MSG_KEYNAME_F20] = "f20",
 198         [MSG_KEYNAME_KPENTER] = "keypad enter",
 199         [MSG_KEYNAME_RIGHTCTRL] = "right control",
 200         [MSG_KEYNAME_KPSLASH] = "keypad slash",
 201         [MSG_KEYNAME_SYSRQ] = "sysrq",
 202         [MSG_KEYNAME_RIGHTALT] = "right alt",
 203         [MSG_KEYNAME_LF] = "line feed",
 204         [MSG_KEYNAME_HOME] = "home",
 205         [MSG_KEYNAME_UP] = "up",
 206         [MSG_KEYNAME_PGUP] = "page up",
 207         [MSG_KEYNAME_LEFT] = "left",
 208         [MSG_KEYNAME_RIGHT] = "right",
 209         [MSG_KEYNAME_END] = "end",
 210         [MSG_KEYNAME_DOWN] = "down",
 211         [MSG_KEYNAME_PGDN] = "page down",
 212         [MSG_KEYNAME_INS] = "insert",
 213         [MSG_KEYNAME_DEL] = "delete",
 214         [MSG_KEYNAME_MACRO] = "macro",
 215         [MSG_KEYNAME_MUTE] = "mute",
 216         [MSG_KEYNAME_VOLDOWN] = "volume down",
 217         [MSG_KEYNAME_VOLUP] = "volume up",
 218         [MSG_KEYNAME_POWER] = "power",
 219         [MSG_KEYNAME_KPEQUAL] = "keypad equal",
 220         [MSG_KEYNAME_KPPLUSDASH] = "keypad plusminus",
 221         [MSG_KEYNAME_PAUSE] = "pause",
 222         [MSG_KEYNAME_F21] = "f21",
 223         [MSG_KEYNAME_F22] = "f22",
 224         [MSG_KEYNAME_F23] = "f23",
 225         [MSG_KEYNAME_F24] = "f24",
 226         [MSG_KEYNAME_KPCOMMA] = "keypad comma",
 227         [MSG_KEYNAME_LEFTMETA] = "left meta",
 228         [MSG_KEYNAME_RIGHTMETA] = "right meta",
 229         [MSG_KEYNAME_COMPOSE] = "compose",
 230         [MSG_KEYNAME_STOP] = "stop",
 231         [MSG_KEYNAME_AGAIN] = "again",
 232         [MSG_KEYNAME_PROPS] = "props",
 233         [MSG_KEYNAME_UNDO] = "undo",
 234         [MSG_KEYNAME_FRONT] = "front",
 235         [MSG_KEYNAME_COPY] = "copy",
 236         [MSG_KEYNAME_OPEN] = "open",
 237         [MSG_KEYNAME_PASTE] = "paste",
 238         [MSG_KEYNAME_FIND] = "find",
 239         [MSG_KEYNAME_CUT] = "cut",
 240         [MSG_KEYNAME_HELP] = "help",
 241         [MSG_KEYNAME_MENU] = "menu",
 242         [MSG_KEYNAME_CALC] = "calc",
 243         [MSG_KEYNAME_SETUP] = "setup",
 244         [MSG_KEYNAME_SLEEP] = "sleep",
 245         [MSG_KEYNAME_WAKEUP] = "wakeup",
 246         [MSG_KEYNAME_FILE] = "file",
 247         [MSG_KEYNAME_SENDFILE] = "send file",
 248         [MSG_KEYNAME_DELFILE] = "delete file",
 249         [MSG_KEYNAME_XFER] = "transfer",
 250         [MSG_KEYNAME_PROG1] = "prog1",
 251         [MSG_KEYNAME_PROG2] = "prog2",
 252         [MSG_KEYNAME_WWW] = "www",
 253         [MSG_KEYNAME_MSDOS] = "msdos",
 254         [MSG_KEYNAME_COFFEE] = "coffee",
 255         [MSG_KEYNAME_DIRECTION] = "direction",
 256         [MSG_KEYNAME_CYCLEWINDOWS] = "cycle windows",
 257         [MSG_KEYNAME_MAIL] = "mail",
 258         [MSG_KEYNAME_BOOKMARKS] = "bookmarks",
 259         [MSG_KEYNAME_COMPUTER] = "computer",
 260         [MSG_KEYNAME_BACK] = "back",
 261         [MSG_KEYNAME_FORWARD] = "forward",
 262         [MSG_KEYNAME_CLOSECD] = "close cd",
 263         [MSG_KEYNAME_EJECTCD] = "eject cd",
 264         [MSG_KEYNAME_EJECTCLOSE] = "eject close cd",
 265         [MSG_KEYNAME_NEXTSONG] = "next song",
 266         [MSG_KEYNAME_PLAYPAUSE] = "play pause",
 267         [MSG_KEYNAME_PREVSONG] = "previous song",
 268         [MSG_KEYNAME_STOPCD] = "stop cd",
 269         [MSG_KEYNAME_RECORD] = "record",
 270         [MSG_KEYNAME_REWIND] = "rewind",
 271         [MSG_KEYNAME_PHONE] = "phone",
 272         [MSG_KEYNAME_ISO] = "iso",
 273         [MSG_KEYNAME_CONFIG] = "config",
 274         [MSG_KEYNAME_HOMEPG] = "home page",
 275         [MSG_KEYNAME_REFRESH] = "refresh",
 276         [MSG_KEYNAME_EXIT] = "exit",
 277         [MSG_KEYNAME_MOVE] = "move",
 278         [MSG_KEYNAME_EDIT] = "edit",
 279         [MSG_KEYNAME_SCROLLUP] = "scroll up",
 280         [MSG_KEYNAME_SCROLLDN] = "scroll down",
 281         [MSG_KEYNAME_KPLEFTPAR] = "keypad left paren",
 282         [MSG_KEYNAME_KPRIGHTPAR] = "keypad right paren",
 283
 284         /* Function names. */
 285         [MSG_FUNCNAME_ATTRIB_BLEEP_DEC] = "attribute bleep decrement",
 286         [MSG_FUNCNAME_ATTRIB_BLEEP_INC] = "attribute bleep increment",
 287         [MSG_FUNCNAME_BLEEPS_DEC] = "bleeps decrement",
 288         [MSG_FUNCNAME_BLEEPS_INC] = "bleeps increment",
 289         [MSG_FUNCNAME_CHAR_FIRST] = "character, first",
 290         [MSG_FUNCNAME_CHAR_LAST] = "character, last",
 291         [MSG_FUNCNAME_CHAR_CURRENT] = "character, say current",
 292         [MSG_FUNCNAME_CHAR_HEX_AND_DEC] = "character, say hex and decimal",
 293         [MSG_FUNCNAME_CHAR_NEXT] = "character, say next",
 294         [MSG_FUNCNAME_CHAR_PHONETIC] = "character, say phonetic",
 295         [MSG_FUNCNAME_CHAR_PREVIOUS] = "character, say previous",
 296         [MSG_FUNCNAME_CURSOR_PARK] = "cursor park",
 297         [MSG_FUNCNAME_CUT] = "cut",
 298         [MSG_FUNCNAME_EDIT_DELIM] = "edit delimiters",
 299         [MSG_FUNCNAME_EDIT_EXNUM] = "edit exnum",
 300         [MSG_FUNCNAME_EDIT_MOST] = "edit most",
 301         [MSG_FUNCNAME_EDIT_REPEATS] = "edit repeats",
 302         [MSG_FUNCNAME_EDIT_SOME] = "edit some",
 303         [MSG_FUNCNAME_GOTO] = "go to",
 304         [MSG_FUNCNAME_GOTO_BOTTOM] = "go to bottom edge",
 305         [MSG_FUNCNAME_GOTO_LEFT] = "go to left edge",
 306         [MSG_FUNCNAME_GOTO_RIGHT] = "go to right edge",
 307         [MSG_FUNCNAME_GOTO_TOP] = "go to top edge",
 308         [MSG_FUNCNAME_HELP] = "help",
 309         [MSG_FUNCNAME_LINE_SAY_CURRENT] = "line, say current",
 310         [MSG_FUNCNAME_LINE_SAY_NEXT] = "line, say next",
 311         [MSG_FUNCNAME_LINE_SAY_PREVIOUS] = "line, say previous",
 312         [MSG_FUNCNAME_LINE_SAY_WITH_INDENT] = "line, say with indent",
 313         [MSG_FUNCNAME_PASTE] = "paste",
 314         [MSG_FUNCNAME_PITCH_DEC] = "pitch decrement",
 315         [MSG_FUNCNAME_PITCH_INC] = "pitch increment",
 316         [MSG_FUNCNAME_PUNC_DEC] = "punctuation decrement",
 317         [MSG_FUNCNAME_PUNC_INC] = "punctuation increment",
 318         [MSG_FUNCNAME_PUNC_LEVEL_DEC] = "punc level decrement",
 319         [MSG_FUNCNAME_PUNC_LEVEL_INC] = "punc level increment",
 320         [MSG_FUNCNAME_QUIET] = "quiet",
 321         [MSG_FUNCNAME_RATE_DEC] = "rate decrement",
 322         [MSG_FUNCNAME_RATE_INC] = "rate increment",
 323         [MSG_FUNCNAME_READING_PUNC_DEC] = "reading punctuation decrement",
 324         [MSG_FUNCNAME_READING_PUNC_INC] = "reading punctuation increment",
 325         [MSG_FUNCNAME_SAY_ATTRIBUTES] = "say attributes",
 326         [MSG_FUNCNAME_SAY_FROM_LEFT] = "say from left",
 327         [MSG_FUNCNAME_SAY_FROM_TOP] = "say from top",
 328         [MSG_FUNCNAME_SAY_POSITION] = "say position",
 329         [MSG_FUNCNAME_SAY_SCREEN] = "say screen",
 330         [MSG_FUNCNAME_SAY_TO_BOTTOM] = "say to bottom",
 331         [MSG_FUNCNAME_SAY_TO_RIGHT] = "say to right",
 332         [MSG_FUNCNAME_SPEAKUP] = "speakup",
 333         [MSG_FUNCNAME_SPEAKUP_LOCK] = "speakup lock",
 334         [MSG_FUNCNAME_SPEAKUP_OFF] = "speakup off",
 335         [MSG_FUNCNAME_SPEECH_KILL] = "speech kill",
 336         [MSG_FUNCNAME_SPELL_DELAY_DEC] = "spell delay decrement",
 337         [MSG_FUNCNAME_SPELL_DELAY_INC] = "spell delay increment",
 338         [MSG_FUNCNAME_SPELL_WORD] = "spell word",
 339         [MSG_FUNCNAME_SPELL_WORD_PHONETICALLY] = "spell word phoneticly",
 340         [MSG_FUNCNAME_TONE_DEC] = "tone decrement",
 341         [MSG_FUNCNAME_TONE_INC] = "tone increment",
 342         [MSG_FUNCNAME_VOICE_DEC] = "voice decrement",
 343         [MSG_FUNCNAME_VOICE_INC] = "voice increment",
 344         [MSG_FUNCNAME_VOLUME_DEC] = "volume decrement",
 345         [MSG_FUNCNAME_VOLUME_INC] = "volume increment",
 346         [MSG_FUNCNAME_WINDOW_CLEAR] = "window, clear",
 347         [MSG_FUNCNAME_WINDOW_SAY] = "window, say",
 348         [MSG_FUNCNAME_WINDOW_SET] = "window, set",
 349         [MSG_FUNCNAME_WINDOW_SILENCE] = "window, silence",
 350         [MSG_FUNCNAME_WORD_SAY_CURRENT] = "word, say current",
 351         [MSG_FUNCNAME_WORD_SAY_NEXT] = "word, say next",
 352         [MSG_FUNCNAME_WORD_SAY_PREVIOUS] = "word, say previous",
 353 };
 354
 355 static struct msg_group_t all_groups[] = {
 356         {
 357                 .name = "ctl_keys",
 358                 .start = MSG_CTL_START,
 359                 .end = MSG_CTL_END,
 360         },
 361         {
 362                 .name = "colors",
 363                 .start = MSG_COLORS_START,
 364                 .end = MSG_COLORS_END,
 365         },
 366         {
 367                 .name = "formatted",
 368                 .start = MSG_FORMATTED_START,
 369                 .end = MSG_FORMATTED_END,
 370         },
 371         {
 372                 .name = "function_names",
 373                 .start = MSG_FUNCNAMES_START,
 374                 .end = MSG_FUNCNAMES_END,
 375         },
 376         {
 377                 .name = "key_names",
 378                 .start = MSG_KEYNAMES_START,
 379                 .end = MSG_KEYNAMES_END,
 380         },
 381         {
 382                 .name = "announcements",
 383                 .start = MSG_ANNOUNCEMENTS_START,
 384                 .end = MSG_ANNOUNCEMENTS_END,
 385         },
 386         {
 387                 .name = "states",
 388                 .start = MSG_STATES_START,
 389                 .end = MSG_STATES_END,
 390         },
 391 };
 392
 393 static const  int num_groups = ARRAY_SIZE(all_groups);
 394
 395 char *spk_msg_get(enum msg_index_t index)
 396 {
 397         return speakup_msgs[index];
 398 }
 399
 400 /*
 401  * Function: next_specifier
 402  * Finds the start of the next format specifier in the argument string.
 403  * Return value: pointer to start of format
 404  * specifier, or NULL if no specifier exists.
 405  */
 406 static char *next_specifier(char *input)
 407 {
 408         int found = 0;
 409         char *next_percent = input;
 410
 411         while (next_percent && !found) {
 412                 next_percent = strchr(next_percent, '%');
 413                 if (next_percent) {
 414                         /* skip over doubled percent signs */
 415                         while (next_percent[0] == '%' &&
 416                                next_percent[1] == '%')
 417                                 next_percent += 2;
 418                         if (*next_percent == '%')
 419                                 found = 1;
 420                         else if (*next_percent == '\0')
 421                                 next_percent = NULL;
 422                 }
 423         }
 424
 425         return next_percent;
 426 }
 427
 428 /* Skip over 0 or more flags. */
 429 static char *skip_flags(char *input)
 430 {
 431         while ((*input != '\0') && strchr(" 0+-#", *input))
 432                 input++;
 433         return input;
 434 }
 435
 436 /* Skip over width.precision, if it exists. */
 437 static char *skip_width(char *input)
 438 {
 439         while (isdigit(*input))
 440                 input++;
 441         if (*input == '.') {
 442                 input++;
 443                 while (isdigit(*input))
 444                         input++;
 445         }
 446         return input;
 447 }
 448
 449 /*
 450  * Skip past the end of the conversion part.
 451  * Note that this code only accepts a handful of conversion specifiers:
 452  * c d s x and ld.  Not accidental; these are exactly the ones used in
 453  * the default group of formatted messages.
 454  */
 455 static char *skip_conversion(char *input)
 456 {
 457         if ((input[0] == 'l') && (input[1] == 'd'))
 458                 input += 2;
 459         else if ((*input != '\0') && strchr("cdsx", *input))
 460                 input++;
 461         return input;
 462 }
 463
 464 /*
 465  * Function: find_specifier_end
 466  * Return a pointer to the end of the format specifier.
 467  */
 468 static char *find_specifier_end(char *input)
 469 {
 470         input++;                /* Advance over %. */
 471         input = skip_flags(input);
 472         input = skip_width(input);
 473         input = skip_conversion(input);
 474         return input;
 475 }
 476
 477 /*
 478  * Function: compare_specifiers
 479  * Compare the format specifiers pointed to by *input1 and *input2.
 480  * Return true if they are the same, false otherwise.
 481  * Advance *input1 and *input2 so that they point to the character following
 482  * the end of the specifier.
 483  */
 484 static bool compare_specifiers(char **input1, char **input2)
 485 {
 486         bool same = false;
 487         char *end1 = find_specifier_end(*input1);
 488         char *end2 = find_specifier_end(*input2);
 489         size_t length1 = end1 - *input1;
 490         size_t length2 = end2 - *input2;
 491
 492         if ((length1 == length2) && !memcmp(*input1, *input2, length1))
 493                 same = true;
 494
 495         *input1 = end1;
 496         *input2 = end2;
 497         return same;
 498 }
 499
 500 /*
 501  * Function: fmt_validate
 502  * Check that two format strings contain the same number of format specifiers,
 503  * and that the order of specifiers is the same in both strings.
 504  * Return true if the condition holds, false if it doesn't.
 505  */
 506 static bool fmt_validate(char *template, char *user)
 507 {
 508         bool valid = true;
 509         bool still_comparing = true;
 510         char *template_ptr = template;
 511         char *user_ptr = user;
 512
 513         while (still_comparing && valid) {
 514                 template_ptr = next_specifier(template_ptr);
 515                 user_ptr = next_specifier(user_ptr);
 516                 if (template_ptr && user_ptr) {
 517                         /* Both have at least one more specifier. */
 518                         valid = compare_specifiers(&template_ptr, &user_ptr);
 519                 } else {
 520                         /* No more format specifiers in one or both strings. */
 521                         still_comparing = false;
 522                         /* See if one has more specifiers than the other. */
 523                         if (template_ptr || user_ptr)
 524                                 valid = false;
 525                 }
 526         }
 527         return valid;
 528 }
 529
 530 /*
 531  * Function: msg_set
 532  * Description: Add a user-supplied message to the user_messages array.
 533  * The message text is copied to a memory area allocated with kmalloc.
 534  * If the function fails, then user_messages is untouched.
 535  * Arguments:
 536  * - index: a message number, as found in i18n.h.
 537  * - text:  text of message.  Not NUL-terminated.
 538  * - length: number of bytes in text.
 539  * Failure conditions:
 540  * -EINVAL -  Invalid format specifiers in formatted message or illegal index.
 541  * -ENOMEM -  Unable to allocate memory.
 542  */
 543 ssize_t spk_msg_set(enum msg_index_t index, char *text, size_t length)
 544 {
 545         char *newstr = NULL;
 546         unsigned long flags;
 547
 548         if ((index < MSG_FIRST_INDEX) || (index >= MSG_LAST_INDEX))
 549                 return -EINVAL;
 550
 551         newstr = kmalloc(length + 1, GFP_KERNEL);
 552         if (!newstr)
 553                 return -ENOMEM;
 554
 555         memcpy(newstr, text, length);
 556         newstr[length] = '\0';
 557         if (index >= MSG_FORMATTED_START &&
 558             index <= MSG_FORMATTED_END &&
 559             !fmt_validate(speakup_default_msgs[index], newstr)) {
 560                 kfree(newstr);
 561                 return -EINVAL;
 562         }
 563         spin_lock_irqsave(&speakup_info.spinlock, flags);
 564         if (speakup_msgs[index] != speakup_default_msgs[index])
 565                 kfree(speakup_msgs[index]);
 566         speakup_msgs[index] = newstr;
 567         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 568         return 0;
 569 }
 570
 571 /*
 572  * Find a message group, given its name.  Return a pointer to the structure
 573  * if found, or NULL otherwise.
 574  */
 575 struct msg_group_t *spk_find_msg_group(const char *group_name)
 576 {
 577         struct msg_group_t *group = NULL;
 578         int i;
 579
 580         for (i = 0; i < num_groups; i++) {
 581                 if (!strcmp(all_groups[i].name, group_name)) {
 582                         group = &all_groups[i];
 583                         break;
 584                 }
 585         }
 586         return group;
 587 }
 588
 589 void spk_reset_msg_group(struct msg_group_t *group)
 590 {
 591         unsigned long flags;
 592         enum msg_index_t i;
 593
 594         spin_lock_irqsave(&speakup_info.spinlock, flags);
 595
 596         for (i = group->start; i <= group->end; i++) {
 597                 if (speakup_msgs[i] != speakup_default_msgs[i])
 598                         kfree(speakup_msgs[i]);
 599                 speakup_msgs[i] = speakup_default_msgs[i];
 600         }
 601         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 602 }
 603
 604 /* Called at initialization time, to establish default messages. */
 605 void spk_initialize_msgs(void)
 606 {
 607         memcpy(speakup_msgs, speakup_default_msgs,
 608                sizeof(speakup_default_msgs));
 609 }
 610
 611 /* Free user-supplied strings when module is unloaded: */
 612 void spk_free_user_msgs(void)
 613 {
 614         enum msg_index_t index;
 615         unsigned long flags;
 616
 617         spin_lock_irqsave(&speakup_info.spinlock, flags);
 618         for (index = MSG_FIRST_INDEX; index < MSG_LAST_INDEX; index++) {
 619                 if (speakup_msgs[index] != speakup_default_msgs[index]) {
 620                         kfree(speakup_msgs[index]);
 621                         speakup_msgs[index] = speakup_default_msgs[index];
 622                 }
 623         }
 624         spin_unlock_irqrestore(&speakup_info.spinlock, flags);
 625 }