Mon Mar 31 07:40:53 2008

Asterisk developer's documentation


func_logic.c File Reference

Conditional logic dialplan functions. More...

#include "asterisk.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include "asterisk/module.h"
#include "asterisk/channel.h"
#include "asterisk/pbx.h"
#include "asterisk/logger.h"
#include "asterisk/utils.h"
#include "asterisk/app.h"

Include dependency graph for func_logic.c:

Go to the source code of this file.

Functions

static int acf_if (struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
 AST_MODULE_INFO_STANDARD (ASTERISK_GPL_KEY,"Logical dialplan functions")
static int exists (struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
static int iftime (struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
static int isnull (struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
static int load_module (void)
static int set (struct ast_channel *chan, char *cmd, char *data, char *buf, size_t len)
static int unload_module (void)

Variables

static struct ast_custom_function exists_function
static struct ast_custom_function if_function
static struct ast_custom_function if_time_function
static struct ast_custom_function isnull_function
static struct ast_custom_function set_function


Detailed Description

Conditional logic dialplan functions.

Author:
Anthony Minessale II

Definition in file func_logic.c.


Function Documentation

static int acf_if ( struct ast_channel chan,
char *  cmd,
char *  data,
char *  buf,
size_t  len 
) [static]

Definition at line 93 of file func_logic.c.

References AST_APP_ARG, AST_DECLARE_APP_ARGS, ast_log(), AST_NONSTANDARD_APP_ARGS, ast_strlen_zero(), LOG_WARNING, pbx_checkcondition(), and S_OR.

00095 {
00096    AST_DECLARE_APP_ARGS(args1,
00097       AST_APP_ARG(expr);
00098       AST_APP_ARG(remainder);
00099    );
00100    AST_DECLARE_APP_ARGS(args2,
00101       AST_APP_ARG(iftrue);
00102       AST_APP_ARG(iffalse);
00103    );
00104    args2.iftrue = args2.iffalse = NULL; /* you have to set these, because if there is nothing after the '?',
00105                                  then args1.remainder will be NULL, not a pointer to a null string, and
00106                                  then any garbage in args2.iffalse will not be cleared, and you'll crash.
00107                                   -- and if you mod the ast_app_separate_args func instead, you'll really
00108                                  mess things up badly, because the rest of everything depends on null args
00109                                  for non-specified stuff. */
00110    
00111    AST_NONSTANDARD_APP_ARGS(args1, data, '?');
00112    AST_NONSTANDARD_APP_ARGS(args2, args1.remainder, ':');
00113 
00114    if (ast_strlen_zero(args1.expr) || !(args2.iftrue || args2.iffalse)) {
00115       ast_log(LOG_WARNING, "Syntax IF(<expr>?[<true>][:<false>])  (expr must be non-null, and either <true> or <false> must be non-null)\n");
00116       ast_log(LOG_WARNING, "      In this case, <expr>='%s', <true>='%s', and <false>='%s'\n", args1.expr, args2.iftrue, args2.iffalse);
00117       return -1;
00118    }
00119 
00120    args1.expr = ast_strip(args1.expr);
00121    if (args2.iftrue)
00122       args2.iftrue = ast_strip(args2.iftrue);
00123    if (args2.iffalse)
00124       args2.iffalse = ast_strip(args2.iffalse);
00125 
00126    ast_copy_string(buf, pbx_checkcondition(args1.expr) ? (S_OR(args2.iftrue, "")) : (S_OR(args2.iffalse, "")), len);
00127 
00128    return 0;
00129 }

AST_MODULE_INFO_STANDARD ( ASTERISK_GPL_KEY  ,
"Logical dialplan functions"   
)

static int exists ( struct ast_channel chan,
char *  cmd,
char *  data,
char *  buf,
size_t  len 
) [static]

Definition at line 51 of file func_logic.c.

Referenced by socket_process().

00053 {
00054    strcpy(buf, data && *data ? "1" : "0");
00055 
00056    return 0;
00057 }

static int iftime ( struct ast_channel chan,
char *  cmd,
char *  data,
char *  buf,
size_t  len 
) [static]

Definition at line 59 of file func_logic.c.

References ast_build_timing(), ast_check_timing(), ast_log(), ast_strip_quoted(), ast_strlen_zero(), LOG_WARNING, and strsep().

00061 {
00062    struct ast_timing timing;
00063    char *expr;
00064    char *iftrue;
00065    char *iffalse;
00066 
00067    data = ast_strip_quoted(data, "\"", "\"");
00068    expr = strsep(&data, "?");
00069    iftrue = strsep(&data, ":");
00070    iffalse = data;
00071 
00072    if (ast_strlen_zero(expr) || !(iftrue || iffalse)) {
00073       ast_log(LOG_WARNING,
00074             "Syntax IFTIME(<timespec>?[<true>][:<false>])\n");
00075       return -1;
00076    }
00077 
00078    if (!ast_build_timing(&timing, expr)) {
00079       ast_log(LOG_WARNING, "Invalid Time Spec.\n");
00080       return -1;
00081    }
00082 
00083    if (iftrue)
00084       iftrue = ast_strip_quoted(iftrue, "\"", "\"");
00085    if (iffalse)
00086       iffalse = ast_strip_quoted(iffalse, "\"", "\"");
00087 
00088    ast_copy_string(buf, ast_check_timing(&timing) ? iftrue : iffalse, len);
00089 
00090    return 0;
00091 }

static int isnull ( struct ast_channel chan,
char *  cmd,
char *  data,
char *  buf,
size_t  len 
) [static]

Definition at line 43 of file func_logic.c.

00045 {
00046    strcpy(buf, data && *data ? "0" : "1");
00047 
00048    return 0;
00049 }

static int load_module ( void   )  [static]

Definition at line 203 of file func_logic.c.

References ast_custom_function_register(), exists_function, if_function, if_time_function, isnull_function, and set_function.

00204 {
00205    int res = 0;
00206 
00207    res |= ast_custom_function_register(&isnull_function);
00208    res |= ast_custom_function_register(&set_function);
00209    res |= ast_custom_function_register(&exists_function);
00210    res |= ast_custom_function_register(&if_function);
00211    res |= ast_custom_function_register(&if_time_function);
00212 
00213    return res;
00214 }

static int set ( struct ast_channel chan,
char *  cmd,
char *  data,
char *  buf,
size_t  len 
) [static]

Definition at line 131 of file func_logic.c.

References ast_log(), ast_strlen_zero(), LOG_WARNING, pbx_builtin_setvar_helper(), and strsep().

00133 {
00134    char *varname;
00135    char *val;
00136 
00137    varname = strsep(&data, "=");
00138    val = data;
00139 
00140    if (ast_strlen_zero(varname) || !val) {
00141       ast_log(LOG_WARNING, "Syntax SET(<varname>=[<value>])\n");
00142       return -1;
00143    }
00144 
00145    varname = ast_strip(varname);
00146    val = ast_strip(val);
00147    pbx_builtin_setvar_helper(chan, varname, val);
00148    ast_copy_string(buf, val, len);
00149 
00150    return 0;
00151 }

static int unload_module ( void   )  [static]

Definition at line 190 of file func_logic.c.

References ast_custom_function_unregister(), exists_function, if_function, if_time_function, isnull_function, and set_function.

00191 {
00192    int res = 0;
00193 
00194    res |= ast_custom_function_unregister(&isnull_function);
00195    res |= ast_custom_function_unregister(&set_function);
00196    res |= ast_custom_function_unregister(&exists_function);
00197    res |= ast_custom_function_unregister(&if_function);
00198    res |= ast_custom_function_unregister(&if_time_function);
00199 
00200    return res;
00201 }


Variable Documentation

struct ast_custom_function exists_function [static]

Definition at line 167 of file func_logic.c.

Referenced by load_module(), and unload_module().

struct ast_custom_function if_function [static]

Definition at line 174 of file func_logic.c.

Referenced by load_module(), and unload_module().

struct ast_custom_function if_time_function [static]

Definition at line 182 of file func_logic.c.

Referenced by load_module(), and unload_module().

struct ast_custom_function isnull_function [static]

Definition at line 153 of file func_logic.c.

Referenced by load_module(), and unload_module().

struct ast_custom_function set_function [static]

Definition at line 160 of file func_logic.c.

Referenced by load_module(), and unload_module().


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