diff options
Diffstat (limited to 'trunk/funcs/func_strings.c')
| -rw-r--r-- | trunk/funcs/func_strings.c | 886 |
1 files changed, 886 insertions, 0 deletions
diff --git a/trunk/funcs/func_strings.c b/trunk/funcs/func_strings.c new file mode 100644 index 000000000..54730e108 --- /dev/null +++ b/trunk/funcs/func_strings.c @@ -0,0 +1,886 @@ +/* + * Asterisk -- An open source telephony toolkit. + * + * Copyright (C) 2005-2006, Digium, Inc. + * Portions Copyright (C) 2005, Tilghman Lesher. All rights reserved. + * Portions Copyright (C) 2005, Anthony Minessale II + * + * See http://www.asterisk.org for more information about + * the Asterisk project. Please do not directly contact + * any of the maintainers of this project for assistance; + * the project provides a web site, mailing lists and IRC + * channels for your use. + * + * This program is free software, distributed under the terms of + * the GNU General Public License Version 2. See the LICENSE file + * at the top of the source tree. + */ + +/*! \file + * + * \brief String manipulation dialplan functions + * + * \author Tilghman Lesher + * \author Anothony Minessale II + * \ingroup functions + */ + +#include "asterisk.h" + +ASTERISK_FILE_VERSION(__FILE__, "$Revision$") + +#include <regex.h> +#include <ctype.h> + +#include "asterisk/module.h" +#include "asterisk/channel.h" +#include "asterisk/pbx.h" +#include "asterisk/utils.h" +#include "asterisk/app.h" +#include "asterisk/localtime.h" + +static int function_fieldqty(struct ast_channel *chan, const char *cmd, + char *parse, char *buf, size_t len) +{ + char *varsubst, varval[8192], *varval2 = varval; + int fieldcount = 0; + AST_DECLARE_APP_ARGS(args, + AST_APP_ARG(varname); + AST_APP_ARG(delim); + ); + char delim[2] = ""; + size_t delim_used; + + if (chan) + ast_autoservice_start(chan); + + AST_STANDARD_APP_ARGS(args, parse); + if (args.delim) { + ast_get_encoded_char(args.delim, delim, &delim_used); + + varsubst = alloca(strlen(args.varname) + 4); + + sprintf(varsubst, "${%s}", args.varname); + pbx_substitute_variables_helper(chan, varsubst, varval, sizeof(varval) - 1); + if (ast_strlen_zero(varval2)) + fieldcount = 0; + else { + while (strsep(&varval2, delim)) + fieldcount++; + } + } else { + fieldcount = 1; + } + snprintf(buf, len, "%d", fieldcount); + + if (chan) + ast_autoservice_stop(chan); + + return 0; +} + +static struct ast_custom_function fieldqty_function = { + .name = "FIELDQTY", + .synopsis = "Count the fields, with an arbitrary delimiter", + .syntax = "FIELDQTY(<varname>,<delim>)", + .read = function_fieldqty, +}; + +static int filter(struct ast_channel *chan, const char *cmd, char *parse, char *buf, + size_t len) +{ + AST_DECLARE_APP_ARGS(args, + AST_APP_ARG(allowed); + AST_APP_ARG(string); + ); + char *outbuf = buf, ac; + char allowed[256] = ""; + size_t allowedlen = 0; + + AST_STANDARD_APP_ARGS(args, parse); + + if (!args.string) { + ast_log(LOG_ERROR, "Usage: FILTER(<allowed-chars>,<string>)\n"); + return -1; + } + + /* Expand ranges */ + for (; *(args.allowed) && allowedlen < sizeof(allowed); (args.allowed)++) { + char c1 = 0, c2 = 0; + size_t consumed = 0; + + if (ast_get_encoded_char(args.allowed, &c1, &consumed)) + return -1; + args.allowed += consumed; + + if (*(args.allowed) == '-') { + if (ast_get_encoded_char(args.allowed + 1, &c2, &consumed)) + c2 = -1; + args.allowed += consumed + 1; + + /*!\note + * Looks a little strange, until you realize that we can overflow + * the size of a char. + */ + for (ac = c1; ac != c2 && allowedlen < sizeof(allowed) - 1; ac++) + allowed[allowedlen++] = ac; + allowed[allowedlen++] = ac; + + ast_debug(4, "c1=%d, c2=%d\n", c1, c2); + + /* Decrement before the loop increment */ + (args.allowed)--; + } else + allowed[allowedlen++] = c1; + } + + ast_debug(1, "Allowed: %s\n", allowed); + + for (; *(args.string) && (buf + len - 1 > outbuf); (args.string)++) { + if (strchr(allowed, *(args.string))) + *outbuf++ = *(args.string); + } + *outbuf = '\0'; + + return 0; +} + +static struct ast_custom_function filter_function = { + .name = "FILTER", + .synopsis = "Filter the string to include only the allowed characters", + .syntax = "FILTER(<allowed-chars>,<string>)", + .read = filter, + .desc = +"Permits all characters listed in <allowed-chars>, filtering all others out.\n" +"In addition to literally listing the characters, you may also use ranges of\n" +"characters (delimited by a '-'), as well as hexadecimal characters started\n" +"with a \\x (i.e. \\x20) and octal characters started with \\0 (i.e. \\040).\n" +"Also, \\t, \\n, and \\r are recognized. If you want a literal '-' character,\n" +"simply prefix it with a '\\'\n", +}; + +static int regex(struct ast_channel *chan, const char *cmd, char *parse, char *buf, + size_t len) +{ + AST_DECLARE_APP_ARGS(args, + AST_APP_ARG(null); + AST_APP_ARG(reg); + AST_APP_ARG(str); + ); + int errcode; + regex_t regexbuf; + + buf[0] = '\0'; + + AST_NONSTANDARD_APP_ARGS(args, parse, '"'); + + if (args.argc != 3) { + ast_log(LOG_ERROR, "Unexpected arguments: should have been in the form '\"<regex>\" <string>'\n"); + return -1; + } + if ((*args.str == ' ') || (*args.str == '\t')) + args.str++; + + ast_debug(1, "FUNCTION REGEX (%s)(%s)\n", args.reg, args.str); + + if ((errcode = regcomp(®exbuf, args.reg, REG_EXTENDED | REG_NOSUB))) { + regerror(errcode, ®exbuf, buf, len); + ast_log(LOG_WARNING, "Malformed input %s(%s): %s\n", cmd, parse, buf); + return -1; + } + + strcpy(buf, regexec(®exbuf, args.str, 0, NULL, 0) ? "0" : "1"); + + regfree(®exbuf); + + return 0; +} + +static struct ast_custom_function regex_function = { + .name = "REGEX", + .synopsis = "Regular Expression", + .desc = + "Returns 1 if data matches regular expression, or 0 otherwise.\n" + "Please note that the space following the double quotes separating the regex from the data\n" + "is optional and if present, is skipped. If a space is desired at the beginning of the data,\n" + "then put two spaces there; the second will not be skipped.\n", + .syntax = "REGEX(\"<regular expression>\" <data>)", + .read = regex, +}; + +#define HASH_PREFIX "~HASH~%s~" +#define HASH_FORMAT HASH_PREFIX "%s~" + +static char *app_clearhash = "ClearHash"; +static char *syn_clearhash = "Clear the keys from a specified hashname"; +static char *desc_clearhash = +"ClearHash(<hashname>)\n" +" Clears all keys out of the specified hashname\n"; + +/* This function probably should migrate to main/pbx.c, as pbx_builtin_clearvar_prefix() */ +static void clearvar_prefix(struct ast_channel *chan, const char *prefix) +{ + struct ast_var_t *var; + int len = strlen(prefix); + AST_LIST_TRAVERSE_SAFE_BEGIN(&chan->varshead, var, entries) { + if (strncasecmp(prefix, ast_var_name(var), len) == 0) { + AST_LIST_REMOVE_CURRENT(entries); + ast_free(var); + } + } + AST_LIST_TRAVERSE_SAFE_END +} + +static int exec_clearhash(struct ast_channel *chan, void *data) +{ + char prefix[80]; + snprintf(prefix, sizeof(prefix), HASH_PREFIX, data ? (char *)data : "null"); + clearvar_prefix(chan, prefix); + return 0; +} + +static int array(struct ast_channel *chan, const char *cmd, char *var, + const char *value) +{ + AST_DECLARE_APP_ARGS(arg1, + AST_APP_ARG(var)[100]; + ); + AST_DECLARE_APP_ARGS(arg2, + AST_APP_ARG(val)[100]; + ); + char *origvar = "", *value2, varname[256]; + int i, ishash = 0; + + value2 = ast_strdupa(value); + if (!var || !value2) + return -1; + + if (chan) + ast_autoservice_start(chan); + + if (!strcmp(cmd, "HASH")) { + const char *var2 = pbx_builtin_getvar_helper(chan, "~ODBCFIELDS~"); + origvar = var; + if (var2) + var = ast_strdupa(var2); + else { + if (chan) + ast_autoservice_stop(chan); + return -1; + } + ishash = 1; + } + + /* The functions this will generally be used with are SORT and ODBC_*, which + * both return comma-delimited lists. However, if somebody uses literal lists, + * their commas will be translated to vertical bars by the load, and I don't + * want them to be surprised by the result. Hence, we prefer commas as the + * delimiter, but we'll fall back to vertical bars if commas aren't found. + */ + ast_debug(1, "array (%s=%s)\n", var, value2); + AST_STANDARD_APP_ARGS(arg1, var); + + AST_STANDARD_APP_ARGS(arg2, value2); + + for (i = 0; i < arg1.argc; i++) { + ast_debug(1, "array set value (%s=%s)\n", arg1.var[i], + arg2.val[i]); + if (i < arg2.argc) { + if (ishash) { + snprintf(varname, sizeof(varname), HASH_FORMAT, origvar, arg1.var[i]); + pbx_builtin_setvar_helper(chan, varname, arg2.val[i]); + } else { + pbx_builtin_setvar_helper(chan, arg1.var[i], arg2.val[i]); + } + } else { + /* We could unset the variable, by passing a NULL, but due to + * pushvar semantics, that could create some undesired behavior. */ + if (ishash) { + snprintf(varname, sizeof(varname), HASH_FORMAT, origvar, arg1.var[i]); + pbx_builtin_setvar_helper(chan, varname, ""); + } else { + pbx_builtin_setvar_helper(chan, arg1.var[i], ""); + } + } + } + + if (chan) + ast_autoservice_stop(chan); + + return 0; +} + +static int hashkeys_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len) +{ + struct ast_var_t *newvar; + int plen; + char prefix[80]; + snprintf(prefix, sizeof(prefix), HASH_PREFIX, data); + plen = strlen(prefix); + + memset(buf, 0, len); + AST_LIST_TRAVERSE(&chan->varshead, newvar, entries) { + if (strncasecmp(prefix, ast_var_name(newvar), plen) == 0) { + /* Copy everything after the prefix */ + strncat(buf, ast_var_name(newvar) + plen, len); + /* Trim the trailing ~ */ + buf[strlen(buf) - 1] = ','; + } + } + /* Trim the trailing comma */ + buf[strlen(buf) - 1] = '\0'; + return 0; +} + +static int hash_write(struct ast_channel *chan, const char *cmd, char *var, const char *value) +{ + char varname[256]; + AST_DECLARE_APP_ARGS(arg, + AST_APP_ARG(hashname); + AST_APP_ARG(hashkey); + ); + + if (!strchr(var, ',')) { + /* Single argument version */ + return array(chan, "HASH", var, value); + } + + AST_STANDARD_APP_ARGS(arg, var); + snprintf(varname, sizeof(varname), HASH_FORMAT, arg.hashname, arg.hashkey); + pbx_builtin_setvar_helper(chan, varname, value); + + return 0; +} + +static int hash_read(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len) +{ + char varname[256]; + const char *varvalue; + AST_DECLARE_APP_ARGS(arg, + AST_APP_ARG(hashname); + AST_APP_ARG(hashkey); + ); + + AST_STANDARD_APP_ARGS(arg, data); + if (arg.argc == 2) { + snprintf(varname, sizeof(varname), HASH_FORMAT, arg.hashname, arg.hashkey); + varvalue = pbx_builtin_getvar_helper(chan, varname); + if (varvalue) + ast_copy_string(buf, varvalue, len); + else + *buf = '\0'; + } else if (arg.argc == 1) { + char colnames[4096]; + int i; + AST_DECLARE_APP_ARGS(arg2, + AST_APP_ARG(col)[100]; + ); + + /* Get column names, in no particular order */ + hashkeys_read(chan, "HASHKEYS", arg.hashname, colnames, sizeof(colnames)); + pbx_builtin_setvar_helper(chan, "~ODBCFIELDS~", colnames); + + AST_STANDARD_APP_ARGS(arg2, colnames); + *buf = '\0'; + + /* Now get the corresponding column values, in exactly the same order */ + for (i = 0; i < arg2.argc; i++) { + snprintf(varname, sizeof(varname), HASH_FORMAT, arg.hashname, arg2.col[i]); + varvalue = pbx_builtin_getvar_helper(chan, varname); + strncat(buf, varvalue, len); + strncat(buf, ",", len); + } + + /* Strip trailing comma */ + buf[strlen(buf) - 1] = '\0'; + } + + return 0; +} + +static struct ast_custom_function hash_function = { + .name = "HASH", + .synopsis = "Implementation of a dialplan associative array", + .syntax = "HASH(hashname[,hashkey])", + .write = hash_write, + .read = hash_read, + .desc = + "In two argument mode, gets and sets values to corresponding keys within a named\n" + "associative array. The single-argument mode will only work when assigned to from\n" + "a function defined by func_odbc.so.\n", +}; + +static struct ast_custom_function hashkeys_function = { + .name = "HASHKEYS", + .synopsis = "Retrieve the keys of a HASH()", + .syntax = "HASHKEYS(<hashname>)", + .read = hashkeys_read, + .desc = + "Returns a comma-delimited list of the current keys of an associative array\n" + "defined by the HASH() function. Note that if you iterate over the keys of\n" + "the result, adding keys during iteration will cause the result of the HASHKEYS\n" + "function to change.\n", +}; + +static struct ast_custom_function array_function = { + .name = "ARRAY", + .synopsis = "Allows setting multiple variables at once", + .syntax = "ARRAY(var1[,var2[...][,varN]])", + .write = array, + .desc = + "The comma-separated list passed as a value to which the function is set will\n" + "be interpreted as a set of values to which the comma-separated list of\n" + "variable names in the argument should be set.\n" + "Hence, Set(ARRAY(var1,var2)=1,2) will set var1 to 1 and var2 to 2.\n", +}; + +static int acf_sprintf(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len) +{ +#define SPRINTF_FLAG 0 +#define SPRINTF_WIDTH 1 +#define SPRINTF_PRECISION 2 +#define SPRINTF_LENGTH 3 +#define SPRINTF_CONVERSION 4 + int i, state = -1, argcount = 0; + char *formatstart = NULL, *bufptr = buf; + char formatbuf[256] = ""; + int tmpi; + double tmpd; + AST_DECLARE_APP_ARGS(arg, + AST_APP_ARG(format); + AST_APP_ARG(var)[100]; + ); + + AST_STANDARD_APP_ARGS(arg, data); + + /* Scan the format, converting each argument into the requisite format type. */ + for (i = 0; arg.format[i]; i++) { + switch (state) { + case SPRINTF_FLAG: + if (strchr("#0- +'I", arg.format[i])) + break; + state = SPRINTF_WIDTH; + case SPRINTF_WIDTH: + if (arg.format[i] >= '0' && arg.format[i] <= '9') + break; + + /* Next character must be a period to go into a precision */ + if (arg.format[i] == '.') { + state = SPRINTF_PRECISION; + } else { + state = SPRINTF_LENGTH; + i--; + } + break; + case SPRINTF_PRECISION: + if (arg.format[i] >= '0' && arg.format[i] <= '9') + break; + state = SPRINTF_LENGTH; + case SPRINTF_LENGTH: + if (strchr("hl", arg.format[i])) { + if (arg.format[i + 1] == arg.format[i]) + i++; + state = SPRINTF_CONVERSION; + break; + } else if (strchr("Lqjzt", arg.format[i])) + state = SPRINTF_CONVERSION; + break; + state = SPRINTF_CONVERSION; + case SPRINTF_CONVERSION: + if (strchr("diouxXc", arg.format[i])) { + /* Integer */ + + /* Isolate this format alone */ + ast_copy_string(formatbuf, formatstart, sizeof(formatbuf)); + formatbuf[&arg.format[i] - formatstart + 1] = '\0'; + + /* Convert the argument into the required type */ + if (sscanf(arg.var[argcount++], "%d", &tmpi) != 1) { + ast_log(LOG_ERROR, "Argument '%s' is not an integer number for format '%s'\n", arg.var[argcount - 1], formatbuf); + goto sprintf_fail; + } + + /* Format the argument */ + snprintf(bufptr, buf + len - bufptr, formatbuf, tmpi); + + /* Update the position of the next parameter to print */ + bufptr = strchr(buf, '\0'); + } else if (strchr("eEfFgGaA", arg.format[i])) { + /* Double */ + + /* Isolate this format alone */ + ast_copy_string(formatbuf, formatstart, sizeof(formatbuf)); + formatbuf[&arg.format[i] - formatstart + 1] = '\0'; + + /* Convert the argument into the required type */ + if (sscanf(arg.var[argcount++], "%lf", &tmpd) != 1) { + ast_log(LOG_ERROR, "Argument '%s' is not a floating point number for format '%s'\n", arg.var[argcount - 1], formatbuf); + goto sprintf_fail; + } + + /* Format the argument */ + snprintf(bufptr, buf + len - bufptr, formatbuf, tmpd); + + /* Update the position of the next parameter to print */ + bufptr = strchr(buf, '\0'); + } else if (arg.format[i] == 's') { + /* String */ + + /* Isolate this format alone */ + ast_copy_string(formatbuf, formatstart, sizeof(formatbuf)); + formatbuf[&arg.format[i] - formatstart + 1] = '\0'; + + /* Format the argument */ + snprintf(bufptr, buf + len - bufptr, formatbuf, arg.var[argcount++]); + + /* Update the position of the next parameter to print */ + bufptr = strchr(buf, '\0'); + } else if (arg.format[i] == '%') { + /* Literal data to copy */ + *bufptr++ = arg.format[i]; + } else { + /* Not supported */ + + /* Isolate this format alone */ + ast_copy_string(formatbuf, formatstart, sizeof(formatbuf)); + formatbuf[&arg.format[i] - formatstart + 1] = '\0'; + + ast_log(LOG_ERROR, "Format type not supported: '%s' with argument '%s'\n", formatbuf, arg.var[argcount++]); + goto sprintf_fail; + } + state = -1; + break; + default: + if (arg.format[i] == '%') { + state = SPRINTF_FLAG; + formatstart = &arg.format[i]; + break; + } else { + /* Literal data to copy */ + *bufptr++ = arg.format[i]; + } + } + } + return 0; +sprintf_fail: + return -1; +} + +static struct ast_custom_function sprintf_function = { + .name = "SPRINTF", + .synopsis = "Format a variable according to a format string", + .syntax = "SPRINTF(<format>,<arg1>[,...<argN>])", + .read = acf_sprintf, + .desc = +"Parses the format string specified and returns a string matching that format.\n" +"Supports most options supported by sprintf(3). Returns a shortened string if\n" +"a format specifier is not recognized.\n", +}; + +static int quote(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len) +{ + char *bufptr = buf, *dataptr = data; + *bufptr++ = '"'; + for (; bufptr < buf + len - 1; dataptr++) { + if (*dataptr == '\\') { + *bufptr++ = '\\'; + *bufptr++ = '\\'; + } else if (*dataptr == '"') { + *bufptr++ = '\\'; + *bufptr++ = '"'; + } else if (*dataptr == '\0') { + break; + } else { + *bufptr++ = *dataptr; + } + } + *bufptr++ = '"'; + *bufptr = '\0'; + return 0; +} + +static struct ast_custom_function quote_function = { + .name = "QUOTE", + .synopsis = "Quotes a given string, escaping embedded quotes as necessary", + .syntax = "QUOTE(<string>)", + .read = quote, +}; + + +static int len(struct ast_channel *chan, const char *cmd, char *data, char *buf, + size_t len) +{ + int length = 0; + + if (data) + length = strlen(data); + + snprintf(buf, len, "%d", length); + + return 0; +} + +static struct ast_custom_function len_function = { + .name = "LEN", + .synopsis = "Returns the length of the argument given", + .syntax = "LEN(<string>)", + .read = len, +}; + +static int acf_strftime(struct ast_channel *chan, const char *cmd, char *parse, + char *buf, size_t len) +{ + AST_DECLARE_APP_ARGS(args, + AST_APP_ARG(epoch); + AST_APP_ARG(timezone); + AST_APP_ARG(format); + ); + struct timeval tv; + struct ast_tm tm; + + buf[0] = '\0'; + + AST_STANDARD_APP_ARGS(args, parse); + + ast_get_timeval(args.epoch, &tv, ast_tvnow(), NULL); + ast_localtime(&tv, &tm, args.timezone); + + if (!args.format) + args.format = "%c"; + + if (ast_strftime(buf, len, args.format, &tm) <= 0) + ast_log(LOG_WARNING, "C function strftime() output nothing?!!\n"); + + buf[len - 1] = '\0'; + + return 0; +} + +static struct ast_custom_function strftime_function = { + .name = "STRFTIME", + .synopsis = "Returns the current date/time in a specified format.", + .syntax = "STRFTIME([<epoch>][,[timezone][,format]])", + .desc = +"STRFTIME sports all of the same formats as the underlying C function\n" +"strftime(3) - see the man page for details. It also supports the\n" +"following format:\n" +" %[n]q - fractions of a second, with leading zeroes. For example, %3q will\n" +" give milliseconds and %1q will give tenths of a second. The default\n" +" is to output milliseconds (n=3). The common case is to use it in\n" +" combination with %S, as in \"%S.%3q\".\n", + .read = acf_strftime, +}; + +static int acf_strptime(struct ast_channel *chan, const char *cmd, char *data, + char *buf, size_t len) +{ + AST_DECLARE_APP_ARGS(args, + AST_APP_ARG(timestring); + AST_APP_ARG(timezone); + AST_APP_ARG(format); + ); + union { + struct ast_tm atm; + struct tm time; + } t = { { 0, }, }; + + buf[0] = '\0'; + + if (!data) { + ast_log(LOG_ERROR, + "Asterisk function STRPTIME() requires an argument.\n"); + return -1; + } + + AST_STANDARD_APP_ARGS(args, data); + + if (ast_strlen_zero(args.format)) { + ast_log(LOG_ERROR, + "No format supplied to STRPTIME(<timestring>,<timezone>,<format>)"); + return -1; + } + + if (!strptime(args.timestring, args.format, &t.time)) { + ast_log(LOG_WARNING, "C function strptime() output nothing?!!\n"); + } else { + struct timeval tv = ast_mktime(&t.atm, args.timezone); + snprintf(buf, len, "%d", (int) tv.tv_sec); + } + + return 0; +} + +static struct ast_custom_function strptime_function = { + .name = "STRPTIME", + .synopsis = + "Returns the epoch of the arbitrary date/time string structured as described in the format.", + .syntax = "STRPTIME(<datetime>,<timezone>,<format>)", + .desc = + "This is useful for converting a date into an EPOCH time, possibly to pass to\n" + "an application like SayUnixTime or to calculate the difference between two\n" + "date strings.\n" + "\n" + "Example:\n" + " ${STRPTIME(2006-03-01 07:30:35,America/Chicago,%Y-%m-%d %H:%M:%S)} returns 1141219835\n", + .read = acf_strptime, +}; + +static int function_eval(struct ast_channel *chan, const char *cmd, char *data, + char *buf, size_t len) +{ + if (ast_strlen_zero(data)) { + ast_log(LOG_WARNING, "EVAL requires an argument: EVAL(<string>)\n"); + return -1; + } + + if (chan) + ast_autoservice_start(chan); + pbx_substitute_variables_helper(chan, data, buf, len - 1); + if (chan) + ast_autoservice_stop(chan); + + return 0; +} + +static struct ast_custom_function eval_function = { + .name = "EVAL", + .synopsis = "Evaluate stored variables.", + .syntax = "EVAL(<variable>)", + .desc = "Using EVAL basically causes a string to be evaluated twice.\n" + "When a variable or expression is in the dialplan, it will be\n" + "evaluated at runtime. However, if the result of the evaluation\n" + "is in fact a variable or expression, using EVAL will have it\n" + "evaluated a second time. For example, if the variable ${MYVAR}\n" + "contains \"${OTHERVAR}\", then the result of putting ${EVAL(${MYVAR})}\n" + "in the dialplan will be the contents of the variable, OTHERVAR.\n" + "Normally, by just putting ${MYVAR} in the dialplan, you would be\n" + "left with \"${OTHERVAR}\".\n", + .read = function_eval, +}; + +static int keypadhash(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len) +{ + char *bufptr, *dataptr; + + for (bufptr = buf, dataptr = data; bufptr < buf + len - 1; dataptr++) { + if (*dataptr == '1') { + *bufptr++ = '1'; + } else if (strchr("AaBbCc2", *dataptr)) { + *bufptr++ = '2'; + } else if (strchr("DdEeFf3", *dataptr)) { + *bufptr++ = '3'; + } else if (strchr("GgHhIi4", *dataptr)) { + *bufptr++ = '4'; + } else if (strchr("JjKkLl5", *dataptr)) { + *bufptr++ = '5'; + } else if (strchr("MmNnOo6", *dataptr)) { + *bufptr++ = '6'; + } else if (strchr("PpQqRrSs7", *dataptr)) { + *bufptr++ = '7'; + } else if (strchr("TtUuVv8", *dataptr)) { + *bufptr++ = '8'; + } else if (strchr("WwXxYyZz9", *dataptr)) { + *bufptr++ = '9'; + } else if (*dataptr == '0') { + *bufptr++ = '0'; + } else if (*dataptr == '\0') { + *bufptr++ = '\0'; + break; + } + } + buf[len - 1] = '\0'; + + return 0; +} + +static struct ast_custom_function keypadhash_function = { + .name = "KEYPADHASH", + .synopsis = "Hash the letters in the string into the equivalent keypad numbers.", + .syntax = "KEYPADHASH(<string>)", + .read = keypadhash, + .desc = "Example: ${KEYPADHASH(Les)} returns \"537\"\n", +}; + +static int string_toupper(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len) +{ + char *bufptr = buf, *dataptr = data; + + while ((bufptr < buf + len - 1) && (*bufptr++ = toupper(*dataptr++))); + + return 0; +} + +static struct ast_custom_function toupper_function = { + .name = "TOUPPER", + .synopsis = "Convert the string to upper case.", + .syntax = "TOUPPER(<string>)", + .read = string_toupper, + .desc = "Example: ${TOUPPER(Example)} returns \"EXAMPLE\"\n", +}; + +static int string_tolower(struct ast_channel *chan, const char *cmd, char *data, char *buf, size_t len) +{ + char *bufptr = buf, *dataptr = data; + + while ((bufptr < buf + len - 1) && (*bufptr++ = tolower(*dataptr++))); + + return 0; +} + +static struct ast_custom_function tolower_function = { + .name = "TOLOWER", + .synopsis = "Convert the string to lower case.", + .syntax = "TOLOWER(<string>)", + .read = string_tolower, + .desc = "Example: ${TOLOWER(Example)} returns \"example\"\n", +}; + +static int unload_module(void) +{ + int res = 0; + + res |= ast_custom_function_unregister(&fieldqty_function); + res |= ast_custom_function_unregister(&filter_function); + res |= ast_custom_function_unregister(®ex_function); + res |= ast_custom_function_unregister(&array_function); + res |= ast_custom_function_unregister("e_function); + res |= ast_custom_function_unregister(&len_function); + res |= ast_custom_function_unregister(&strftime_function); + res |= ast_custom_function_unregister(&strptime_function); + res |= ast_custom_function_unregister(&eval_function); + res |= ast_custom_function_unregister(&keypadhash_function); + res |= ast_custom_function_unregister(&sprintf_function); + res |= ast_custom_function_unregister(&hashkeys_function); + res |= ast_custom_function_unregister(&hash_function); + res |= ast_unregister_application(app_clearhash); + res |= ast_custom_function_unregister(&toupper_function); + res |= ast_custom_function_unregister(&tolower_function); + + return res; +} + +static int load_module(void) +{ + int res = 0; + + res |= ast_custom_function_register(&fieldqty_function); + res |= ast_custom_function_register(&filter_function); + res |= ast_custom_function_register(®ex_function); + res |= ast_custom_function_register(&array_function); + res |= ast_custom_function_register("e_function); + res |= ast_custom_function_register(&len_function); + res |= ast_custom_function_register(&strftime_function); + res |= ast_custom_function_register(&strptime_function); + res |= ast_custom_function_register(&eval_function); + res |= ast_custom_function_register(&keypadhash_function); + res |= ast_custom_function_register(&sprintf_function); + res |= ast_custom_function_register(&hashkeys_function); + res |= ast_custom_function_register(&hash_function); + res |= ast_register_application(app_clearhash, exec_clearhash, syn_clearhash, desc_clearhash); + res |= ast_custom_function_register(&toupper_function); + res |= ast_custom_function_register(&tolower_function); + + return res; +} + +AST_MODULE_INFO_STANDARD(ASTERISK_GPL_KEY, "String handling dialplan functions"); |