funcs/func_strings.c

   1 /*
   2  * Asterisk -- An open source telephony toolkit.
   3  *
   4  * Copyright (C) 2005-2006, Digium, Inc.
   5  * Portions Copyright (C) 2005, Tilghman Lesher.  All rights reserved.
   6  * Portions Copyright (C) 2005, Anthony Minessale II
   7  *
   8  * See http://www.asterisk.org for more information about
   9  * the Asterisk project. Please do not directly contact
  10  * any of the maintainers of this project for assistance;
  11  * the project provides a web site, mailing lists and IRC
  12  * channels for your use.
  13  *
  14  * This program is free software, distributed under the terms of
  15  * the GNU General Public License Version 2. See the LICENSE file
  16  * at the top of the source tree.
  17  */
  18
  19 /*! \file
  20  *
  21  * \brief String manipulation dialplan functions
  22  *
  23  * \author Tilghman Lesher
  24  * \author Anothony Minessale II
  25  */
  26
  27 #include "asterisk.h"
  28
  29 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
  30
  31 #include <stdlib.h>
  32 #include <stdio.h>
  33 #include <string.h>
  34 #include <sys/types.h>
  35 #include <regex.h>
  36
  37 #include "asterisk/module.h"
  38 #include "asterisk/options.h"
  39 #include "asterisk/channel.h"
  40 #include "asterisk/pbx.h"
  41 #include "asterisk/logger.h"
  42 #include "asterisk/utils.h"
  43 #include "asterisk/app.h"
  44 #include "asterisk/localtime.h"
  45
  46 static int function_fieldqty(struct ast_channel *chan, char *cmd,
  47                              char *parse, char *buf, size_t len)
  48 {
  49         char *varsubst, varval[8192] = "", *varval2 = varval;
  50         int fieldcount = 0;
  51         AST_DECLARE_APP_ARGS(args,
  52                              AST_APP_ARG(varname);
  53                              AST_APP_ARG(delim);
  54                 );
  55
  56         if (chan)
  57                 ast_autoservice_start(chan);
  58
  59         AST_STANDARD_APP_ARGS(args, parse);
  60         if (args.delim) {
  61                 varsubst = alloca(strlen(args.varname) + 4);
  62
  63                 sprintf(varsubst, "${%s}", args.varname);
  64                 pbx_substitute_variables_helper(chan, varsubst, varval, sizeof(varval) - 1);
  65                 if (ast_strlen_zero(varval2))
  66                         fieldcount = 0;
  67                 else {
  68                         while (strsep(&varval2, args.delim))
  69                                 fieldcount++;
  70                 }
  71         } else {
  72                 fieldcount = 1;
  73         }
  74         snprintf(buf, len, "%d", fieldcount);
  75
  76         if (chan)
  77                 ast_autoservice_stop(chan);
  78
  79         return 0;
  80 }
  81
  82 static struct ast_custom_function fieldqty_function = {
  83         .name = "FIELDQTY",
  84         .synopsis = "Count the fields, with an arbitrary delimiter",
  85         .syntax = "FIELDQTY(<varname>|<delim>)",
  86         .read = function_fieldqty,
  87 };
  88
  89 static int filter(struct ast_channel *chan, char *cmd, char *parse, char *buf,
  90                   size_t len)
  91 {
  92         AST_DECLARE_APP_ARGS(args,
  93                              AST_APP_ARG(allowed);
  94                              AST_APP_ARG(string);
  95         );
  96         char *outbuf = buf;
  97
  98         AST_STANDARD_APP_ARGS(args, parse);
  99
 100         if (!args.string) {
 101                 ast_log(LOG_ERROR, "Usage: FILTER(<allowed-chars>|<string>)\n");
 102                 return -1;
 103         }
 104
 105         for (; *(args.string) && (buf + len - 1 > outbuf); (args.string)++) {
 106                 if (strchr(args.allowed, *(args.string)))
 107                         *outbuf++ = *(args.string);
 108         }
 109         *outbuf = '\0';
 110
 111         return 0;
 112 }
 113
 114 static struct ast_custom_function filter_function = {
 115         .name = "FILTER",
 116         .synopsis = "Filter the string to include only the allowed characters",
 117         .syntax = "FILTER(<allowed-chars>|<string>)",
 118         .read = filter,
 119 };
 120
 121 static int regex(struct ast_channel *chan, char *cmd, char *parse, char *buf,
 122                  size_t len)
 123 {
 124         AST_DECLARE_APP_ARGS(args,
 125                              AST_APP_ARG(null);
 126                              AST_APP_ARG(reg);
 127                              AST_APP_ARG(str);
 128         );
 129         int errcode;
 130         regex_t regexbuf;
 131
 132         buf[0] = '\0';
 133
 134         AST_NONSTANDARD_APP_ARGS(args, parse, '"');
 135
 136         if (args.argc != 3) {
 137                 ast_log(LOG_ERROR, "Unexpected arguments: should have been in the form '\"<regex>\" <string>'\n");
 138                 return -1;
 139         }
 140         if ((*args.str == ' ') || (*args.str == '\t'))
 141                 args.str++;
 142
 143         if (option_debug)
 144                 ast_log(LOG_DEBUG, "FUNCTION REGEX (%s)(%s)\n", args.reg, args.str);
 145
 146         if ((errcode = regcomp(&regexbuf, args.reg, REG_EXTENDED | REG_NOSUB))) {
 147                 regerror(errcode, &regexbuf, buf, len);
 148                 ast_log(LOG_WARNING, "Malformed input %s(%s): %s\n", cmd, parse, buf);
 149                 return -1;
 150         }
 151
 152         strcpy(buf, regexec(&regexbuf, args.str, 0, NULL, 0) ? "0" : "1");
 153
 154         regfree(&regexbuf);
 155
 156         return 0;
 157 }
 158
 159 static struct ast_custom_function regex_function = {
 160         .name = "REGEX",
 161         .synopsis = "Regular Expression",
 162         .desc =
 163                 "Returns 1 if data matches regular expression, or 0 otherwise.\n"
 164                 "Please note that the space following the double quotes separating the regex from the data\n"
 165                 "is optional and if present, is skipped. If a space is desired at the beginning of the data,\n"
 166                 "then put two spaces there; the second will not be skipped.\n",
 167         .syntax = "REGEX(\"<regular expression>\" <data>)",
 168         .read = regex,
 169 };
 170
 171 static int array(struct ast_channel *chan, char *cmd, char *var,
 172                  const char *value)
 173 {
 174         AST_DECLARE_APP_ARGS(arg1,
 175                              AST_APP_ARG(var)[100];
 176         );
 177         AST_DECLARE_APP_ARGS(arg2,
 178                              AST_APP_ARG(val)[100];
 179         );
 180         char *value2;
 181         int i;
 182
 183         value2 = ast_strdupa(value);
 184         if (!var || !value2)
 185                 return -1;
 186
 187         if (chan)
 188                 ast_autoservice_start(chan);
 189
 190         /* The functions this will generally be used with are SORT and ODBC_*, which
 191          * both return comma-delimited lists.  However, if somebody uses literal lists,
 192          * their commas will be translated to vertical bars by the load, and I don't
 193          * want them to be surprised by the result.  Hence, we prefer commas as the
 194          * delimiter, but we'll fall back to vertical bars if commas aren't found.
 195          */
 196         if (option_debug)
 197                 ast_log(LOG_DEBUG, "array (%s=%s)\n", var, value2);
 198         if (strchr(var, ','))
 199                 AST_NONSTANDARD_APP_ARGS(arg1, var, ',');
 200         else
 201                 AST_STANDARD_APP_ARGS(arg1, var);
 202
 203         if (strchr(value2, ','))
 204                 AST_NONSTANDARD_APP_ARGS(arg2, value2, ',');
 205         else
 206                 AST_STANDARD_APP_ARGS(arg2, value2);
 207
 208         for (i = 0; i < arg1.argc; i++) {
 209                 if (option_debug)
 210                         ast_log(LOG_DEBUG, "array set value (%s=%s)\n", arg1.var[i],
 211                                 arg2.val[i]);
 212                 if (i < arg2.argc) {
 213                         pbx_builtin_setvar_helper(chan, arg1.var[i], arg2.val[i]);
 214                 } else {
 215                         /* We could unset the variable, by passing a NULL, but due to
 216                          * pushvar semantics, that could create some undesired behavior. */
 217                         pbx_builtin_setvar_helper(chan, arg1.var[i], "");
 218                 }
 219         }
 220
 221         if (chan)
 222                 ast_autoservice_stop(chan);
 223
 224         return 0;
 225 }
 226
 227 static struct ast_custom_function array_function = {
 228         .name = "ARRAY",
 229         .synopsis = "Allows setting multiple variables at once",
 230         .syntax = "ARRAY(var1[|var2[...][|varN]])",
 231         .write = array,
 232         .desc =
 233                 "The comma-separated list passed as a value to which the function is set will\n"
 234                 "be interpreted as a set of values to which the comma-separated list of\n"
 235                 "variable names in the argument should be set.\n"
 236                 "Hence, Set(ARRAY(var1|var2)=1\\,2) will set var1 to 1 and var2 to 2\n"
 237                 "Note: remember to either backslash your commas in extensions.conf or quote the\n"
 238                 "entire argument, since Set can take multiple arguments itself.\n",
 239 };
 240
 241 static int acf_sprintf(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
 242 {
 243 #define SPRINTF_FLAG    0
 244 #define SPRINTF_WIDTH   1
 245 #define SPRINTF_PRECISION       2
 246 #define SPRINTF_LENGTH  3
 247 #define SPRINTF_CONVERSION      4
 248         int i, state = -1, argcount = 0;
 249         char *formatstart = NULL, *bufptr = buf;
 250         char formatbuf[256] = "";
 251         int tmpi;
 252         double tmpd;
 253         AST_DECLARE_APP_ARGS(arg,
 254                                 AST_APP_ARG(format);
 255                                 AST_APP_ARG(var)[100];
 256         );
 257
 258         AST_STANDARD_APP_ARGS(arg, data);
 259
 260         /* Scan the format, converting each argument into the requisite format type. */
 261         for (i = 0; arg.format[i]; i++) {
 262                 switch (state) {
 263                 case SPRINTF_FLAG:
 264                         if (strchr("#0- +'I", arg.format[i]))
 265                                 break;
 266                         state = SPRINTF_WIDTH;
 267                 case SPRINTF_WIDTH:
 268                         if (arg.format[i] >= '0' && arg.format[i] <= '9')
 269                                 break;
 270
 271                         /* Next character must be a period to go into a precision */
 272                         if (arg.format[i] == '.') {
 273                                 state = SPRINTF_PRECISION;
 274                         } else {
 275                                 state = SPRINTF_LENGTH;
 276                                 i--;
 277                         }
 278                         break;
 279                 case SPRINTF_PRECISION:
 280                         if (arg.format[i] >= '0' && arg.format[i] <= '9')
 281                                 break;
 282                         state = SPRINTF_LENGTH;
 283                 case SPRINTF_LENGTH:
 284                         if (strchr("hl", arg.format[i])) {
 285                                 if (arg.format[i + 1] == arg.format[i])
 286                                         i++;
 287                                 state = SPRINTF_CONVERSION;
 288                                 break;
 289                         } else if (strchr("Lqjzt", arg.format[i])) {
 290                                 state = SPRINTF_CONVERSION;
 291                                 break;
 292                         }
 293                         state = SPRINTF_CONVERSION;
 294                 case SPRINTF_CONVERSION:
 295                         if (strchr("diouxXc", arg.format[i])) {
 296                                 /* Integer */
 297
 298                                 /* Isolate this format alone */
 299                                 ast_copy_string(formatbuf, formatstart, sizeof(formatbuf));
 300                                 formatbuf[&arg.format[i] - formatstart + 1] = '\0';
 301
 302                                 /* Convert the argument into the required type */
 303                                 if (sscanf(arg.var[argcount++], "%d", &tmpi) != 1) {
 304                                         ast_log(LOG_ERROR, "Argument '%s' is not an integer number for format '%s'\n", arg.var[argcount - 1], formatbuf);
 305                                         goto sprintf_fail;
 306                                 }
 307
 308                                 /* Format the argument */
 309                                 snprintf(bufptr, buf + len - bufptr, formatbuf, tmpi);
 310
 311                                 /* Update the position of the next parameter to print */
 312                                 bufptr = strchr(buf, '\0');
 313                         } else if (strchr("eEfFgGaA", arg.format[i])) {
 314                                 /* Double */
 315
 316                                 /* Isolate this format alone */
 317                                 ast_copy_string(formatbuf, formatstart, sizeof(formatbuf));
 318                                 formatbuf[&arg.format[i] - formatstart + 1] = '\0';
 319
 320                                 /* Convert the argument into the required type */
 321                                 if (sscanf(arg.var[argcount++], "%lf", &tmpd) != 1) {
 322                                         ast_log(LOG_ERROR, "Argument '%s' is not a floating point number for format '%s'\n", arg.var[argcount - 1], formatbuf);
 323                                         goto sprintf_fail;
 324                                 }
 325
 326                                 /* Format the argument */
 327                                 snprintf(bufptr, buf + len - bufptr, formatbuf, tmpd);
 328
 329                                 /* Update the position of the next parameter to print */
 330                                 bufptr = strchr(buf, '\0');
 331                         } else if (arg.format[i] == 's') {
 332                                 /* String */
 333
 334                                 /* Isolate this format alone */
 335                                 ast_copy_string(formatbuf, formatstart, sizeof(formatbuf));
 336                                 formatbuf[&arg.format[i] - formatstart + 1] = '\0';
 337
 338                                 /* Format the argument */
 339                                 snprintf(bufptr, buf + len - bufptr, formatbuf, arg.var[argcount++]);
 340
 341                                 /* Update the position of the next parameter to print */
 342                                 bufptr = strchr(buf, '\0');
 343                         } else if (arg.format[i] == '%') {
 344                                 /* Literal data to copy */
 345                                 *bufptr++ = arg.format[i];
 346                         } else {
 347                                 /* Not supported */
 348
 349                                 /* Isolate this format alone */
 350                                 ast_copy_string(formatbuf, formatstart, sizeof(formatbuf));
 351                                 formatbuf[&arg.format[i] - formatstart + 1] = '\0';
 352
 353                                 ast_log(LOG_ERROR, "Format type not supported: '%s' with argument '%s'\n", formatbuf, arg.var[argcount++]);
 354                                 goto sprintf_fail;
 355                         }
 356                         state = -1;
 357                         break;
 358                 default:
 359                         if (arg.format[i] == '%') {
 360                                 state = SPRINTF_FLAG;
 361                                 formatstart = &arg.format[i];
 362                                 break;
 363                         } else {
 364                                 /* Literal data to copy */
 365                                 *bufptr++ = arg.format[i];
 366                         }
 367                 }
 368         }
 369         return 0;
 370 sprintf_fail:
 371         return -1;
 372 }
 373
 374 static struct ast_custom_function sprintf_function = {
 375         .name = "SPRINTF",
 376         .synopsis = "Format a variable according to a format string",
 377         .syntax = "SPRINTF(<format>|<arg1>[|...<argN>])",
 378         .read = acf_sprintf,
 379         .desc =
 380 "Parses the format string specified and returns a string matching that format.\n"
 381 "Supports most options supported by sprintf(3).  Returns a shortened string if\n"
 382 "a format specifier is not recognized.\n",
 383 };
 384
 385 static int quote(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
 386 {
 387         char *bufptr = buf, *dataptr = data;
 388         *bufptr++ = '"';
 389         for (; bufptr < buf + len - 1; dataptr++) {
 390                 if (*dataptr == '\\') {
 391                         *bufptr++ = '\\';
 392                         *bufptr++ = '\\';
 393                 } else if (*dataptr == '"') {
 394                         *bufptr++ = '\\';
 395                         *bufptr++ = '"';
 396                 } else if (*dataptr == '\0') {
 397                         break;
 398                 } else {
 399                         *bufptr++ = *dataptr;
 400                 }
 401         }
 402         *bufptr++ = '"';
 403         *bufptr = '\0';
 404         return 0;
 405 }
 406
 407 static struct ast_custom_function quote_function = {
 408         .name = "QUOTE",
 409         .synopsis = "Quotes a given string, escaping embedded quotes as necessary",
 410         .syntax = "QUOTE(<string>)",
 411         .read = quote,
 412 };
 413
 414
 415 static int len(struct ast_channel *chan, char *cmd, char *data, char *buf,
 416                size_t len)
 417 {
 418         int length = 0;
 419
 420         if (data)
 421                 length = strlen(data);
 422
 423         snprintf(buf, len, "%d", length);
 424
 425         return 0;
 426 }
 427
 428 static struct ast_custom_function len_function = {
 429         .name = "LEN",
 430         .synopsis = "Returns the length of the argument given",
 431         .syntax = "LEN(<string>)",
 432         .read = len,
 433 };
 434
 435 static int acf_strftime(struct ast_channel *chan, char *cmd, char *parse,
 436                         char *buf, size_t len)
 437 {
 438         AST_DECLARE_APP_ARGS(args,
 439                              AST_APP_ARG(epoch);
 440                              AST_APP_ARG(timezone);
 441                              AST_APP_ARG(format);
 442         );
 443         time_t epochi;
 444         struct tm tm;
 445
 446         buf[0] = '\0';
 447
 448         AST_STANDARD_APP_ARGS(args, parse);
 449
 450         ast_get_time_t(args.epoch, &epochi, time(NULL), NULL);
 451         ast_localtime(&epochi, &tm, args.timezone);
 452
 453         if (!args.format)
 454                 args.format = "%c";
 455
 456         if (!strftime(buf, len, args.format, &tm))
 457                 ast_log(LOG_WARNING, "C function strftime() output nothing?!!\n");
 458
 459         buf[len - 1] = '\0';
 460
 461         return 0;
 462 }
 463
 464 static struct ast_custom_function strftime_function = {
 465         .name = "STRFTIME",
 466         .synopsis = "Returns the current date/time in a specified format.",
 467         .syntax = "STRFTIME([<epoch>][|[timezone][|format]])",
 468         .read = acf_strftime,
 469 };
 470
 471 static int acf_strptime(struct ast_channel *chan, char *cmd, char *data,
 472                         char *buf, size_t len)
 473 {
 474         AST_DECLARE_APP_ARGS(args,
 475                              AST_APP_ARG(timestring);
 476                              AST_APP_ARG(timezone);
 477                              AST_APP_ARG(format);
 478         );
 479         struct tm time;
 480
 481         memset(&time, 0, sizeof(struct tm));
 482
 483         buf[0] = '\0';
 484
 485         if (!data) {
 486                 ast_log(LOG_ERROR,
 487                                 "Asterisk function STRPTIME() requires an argument.\n");
 488                 return -1;
 489         }
 490
 491         AST_STANDARD_APP_ARGS(args, data);
 492
 493         if (ast_strlen_zero(args.format)) {
 494                 ast_log(LOG_ERROR,
 495                                 "No format supplied to STRPTIME(<timestring>|<timezone>|<format>)");
 496                 return -1;
 497         }
 498
 499         if (!strptime(args.timestring, args.format, &time)) {
 500                 ast_log(LOG_WARNING, "C function strptime() output nothing?!!\n");
 501         } else {
 502                 /* Since strptime(3) does not check DST, force ast_mktime() to calculate it. */
 503                 time.tm_isdst = -1;
 504                 snprintf(buf, len, "%d", (int) ast_mktime(&time, args.timezone));
 505         }
 506
 507         return 0;
 508 }
 509
 510 static struct ast_custom_function strptime_function = {
 511         .name = "STRPTIME",
 512         .synopsis =
 513                 "Returns the epoch of the arbitrary date/time string structured as described in the format.",
 514         .syntax = "STRPTIME(<datetime>|<timezone>|<format>)",
 515         .desc =
 516                 "This is useful for converting a date into an EPOCH time, possibly to pass to\n"
 517                 "an application like SayUnixTime or to calculate the difference between two\n"
 518                 "date strings.\n"
 519                 "\n"
 520                 "Example:\n"
 521                 "  ${STRPTIME(2006-03-01 07:30:35|America/Chicago|%Y-%m-%d %H:%M:%S)} returns 1141219835\n",
 522         .read = acf_strptime,
 523 };
 524
 525 static int function_eval(struct ast_channel *chan, char *cmd, char *data,
 526                          char *buf, size_t len)
 527 {
 528         memset(buf, 0, len);
 529
 530         if (ast_strlen_zero(data)) {
 531                 ast_log(LOG_WARNING, "EVAL requires an argument: EVAL(<string>)\n");
 532                 return -1;
 533         }
 534
 535         if (chan)
 536                 ast_autoservice_start(chan);
 537         pbx_substitute_variables_helper(chan, data, buf, len - 1);
 538         if (chan)
 539                 ast_autoservice_stop(chan);
 540
 541         return 0;
 542 }
 543
 544 static struct ast_custom_function eval_function = {
 545         .name = "EVAL",
 546         .synopsis = "Evaluate stored variables.",
 547         .syntax = "EVAL(<variable>)",
 548         .desc = "Using EVAL basically causes a string to be evaluated twice.\n"
 549                 "When a variable or expression is in the dialplan, it will be\n"
 550                 "evaluated at runtime. However, if the result of the evaluation\n"
 551                 "is in fact a variable or expression, using EVAL will have it\n"
 552                 "evaluated a second time. For example, if the variable ${MYVAR}\n"
 553                 "contains \"${OTHERVAR}\", then the result of putting ${EVAL(${MYVAR})}\n"
 554                 "in the dialplan will be the contents of the variable, OTHERVAR.\n"
 555                 "Normally, by just putting ${MYVAR} in the dialplan, you would be\n"
 556                 "left with \"${OTHERVAR}\".\n",
 557         .read = function_eval,
 558 };
 559
 560 static int keypadhash(struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
 561 {
 562         char *bufptr, *dataptr;
 563
 564         for (bufptr = buf, dataptr = data; bufptr < buf + len - 1; dataptr++) {
 565                 if (*dataptr == '1') {
 566                         *bufptr++ = '1';
 567                 } else if (strchr("AaBbCc2", *dataptr)) {
 568                         *bufptr++ = '2';
 569                 } else if (strchr("DdEeFf3", *dataptr)) {
 570                         *bufptr++ = '3';
 571                 } else if (strchr("GgHhIi4", *dataptr)) {
 572                         *bufptr++ = '4';
 573                 } else if (strchr("JjKkLl5", *dataptr)) {
 574                         *bufptr++ = '5';
 575                 } else if (strchr("MmNnOo6", *dataptr)) {
 576                         *bufptr++ = '6';
 577                 } else if (strchr("PpQqRrSs7", *dataptr)) {
 578                         *bufptr++ = '7';
 579                 } else if (strchr("TtUuVv8", *dataptr)) {
 580                         *bufptr++ = '8';
 581                 } else if (strchr("WwXxYyZz9", *dataptr)) {
 582                         *bufptr++ = '9';
 583                 } else if (*dataptr == '0') {
 584                         *bufptr++ = '0';
 585                 } else if (*dataptr == '\0') {
 586                         *bufptr++ = '\0';
 587                         break;
 588                 }
 589         }
 590         buf[len - 1] = '\0';
 591
 592         return 0;
 593 }
 594
 595 static struct ast_custom_function keypadhash_function = {
 596         .name = "KEYPADHASH",
 597         .synopsis = "Hash the letters in the string into the equivalent keypad numbers.",
 598         .syntax = "KEYPADHASH(<string>)",
 599         .read = keypadhash,
 600         .desc = "Example:  ${KEYPADHASH(Les)} returns \"537\"\n",
 601 };
 602
 603 static int unload_module(void)
 604 {
 605         int res = 0;
 606
 607         res |= ast_custom_function_unregister(&fieldqty_function);
 608         res |= ast_custom_function_unregister(&filter_function);
 609         res |= ast_custom_function_unregister(&regex_function);
 610         res |= ast_custom_function_unregister(&array_function);
 611         res |= ast_custom_function_unregister(&quote_function);
 612         res |= ast_custom_function_unregister(&len_function);
 613         res |= ast_custom_function_unregister(&strftime_function);
 614         res |= ast_custom_function_unregister(&strptime_function);
 615         res |= ast_custom_function_unregister(&eval_function);
 616         res |= ast_custom_function_unregister(&keypadhash_function);
 617         res |= ast_custom_function_unregister(&sprintf_function);
 618
 619         return res;
 620 }
 621
 622 static int load_module(void)
 623 {
 624         int res = 0;
 625
 626         res |= ast_custom_function_register(&fieldqty_function);
 627         res |= ast_custom_function_register(&filter_function);
 628         res |= ast_custom_function_register(&regex_function);
 629         res |= ast_custom_function_register(&array_function);
 630         res |= ast_custom_function_register(&quote_function);
 631         res |= ast_custom_function_register(&len_function);
 632         res |= ast_custom_function_register(&strftime_function);
 633         res |= ast_custom_function_register(&strptime_function);
 634         res |= ast_custom_function_register(&eval_function);
 635         res |= ast_custom_function_register(&keypadhash_function);
 636         res |= ast_custom_function_register(&sprintf_function);
 637
 638         return res;
 639 }
 640
 641 AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "String handling dialplan functions");