Thu Oct 8 21:56:26 2009

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 91 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.

00093 {
00094    AST_DECLARE_APP_ARGS(args1,
00095       AST_APP_ARG(expr);
00096       AST_APP_ARG(remainder);
00097    );
00098    AST_DECLARE_APP_ARGS(args2,
00099       AST_APP_ARG(iftrue);
00100       AST_APP_ARG(iffalse);
00101    );
00102    args2.iftrue = args2.iffalse = NULL; /* you have to set these, because if there is nothing after the '?',
00103                                  then args1.remainder will be NULL, not a pointer to a null string, and
00104                                  then any garbage in args2.iffalse will not be cleared, and you'll crash.
00105                                   -- and if you mod the ast_app_separate_args func instead, you'll really
00106                                  mess things up badly, because the rest of everything depends on null args
00107                                  for non-specified stuff. */
00108    
00109    AST_NONSTANDARD_APP_ARGS(args1, data, '?');
00110    AST_NONSTANDARD_APP_ARGS(args2, args1.remainder, ':');
00111 
00112    if (ast_strlen_zero(args1.expr) || !(args2.iftrue || args2.iffalse)) {
00113       ast_log(LOG_WARNING, "Syntax IF(<expr>?[<true>][:<false>])  (expr must be non-null, and either <true> or <false> must be non-null)\n");
00114       ast_log(LOG_WARNING, "      In this case, <expr>='%s', <true>='%s', and <false>='%s'\n", args1.expr, args2.iftrue, args2.iffalse);
00115       return -1;
00116    }
00117 
00118    args1.expr = ast_strip(args1.expr);
00119    if (args2.iftrue)
00120       args2.iftrue = ast_strip(args2.iftrue);
00121    if (args2.iffalse)
00122       args2.iffalse = ast_strip(args2.iffalse);
00123 
00124    ast_copy_string(buf, pbx_checkcondition(args1.expr) ? (S_OR(args2.iftrue, "")) : (S_OR(args2.iffalse, "")), len);
00125 
00126    return 0;
00127 }

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 49 of file func_logic.c.

Referenced by socket_process().

00051 {
00052    strcpy(buf, data && *data ? "1" : "0");
00053 
00054    return 0;
00055 }

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

Definition at line 57 of file func_logic.c.

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

00059 {
00060    struct ast_timing timing;
00061    char *expr;
00062    char *iftrue;
00063    char *iffalse;
00064 
00065    data = ast_strip_quoted(data, "\"", "\"");
00066    expr = strsep(&data, "?");
00067    iftrue = strsep(&data, ":");
00068    iffalse = data;
00069 
00070    if (ast_strlen_zero(expr) || !(iftrue || iffalse)) {
00071       ast_log(LOG_WARNING,
00072             "Syntax IFTIME(<timespec>?[<true>][:<false>])\n");
00073       return -1;
00074    }
00075 
00076    if (!ast_build_timing(&timing, expr)) {
00077       ast_log(LOG_WARNING, "Invalid Time Spec.\n");
00078       return -1;
00079    }
00080 
00081    if (iftrue)
00082       iftrue = ast_strip_quoted(iftrue, "\"", "\"");
00083    if (iffalse)
00084       iffalse = ast_strip_quoted(iffalse, "\"", "\"");
00085 
00086    ast_copy_string(buf, ast_check_timing(&timing) ? iftrue : iffalse, len);
00087 
00088    return 0;
00089 }

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

Definition at line 41 of file func_logic.c.

00043 {
00044    strcpy(buf, data && *data ? "0" : "1");
00045 
00046    return 0;
00047 }

static int load_module ( void   )  [static]

Definition at line 201 of file func_logic.c.

References ast_custom_function_register().

00202 {
00203    int res = 0;
00204 
00205    res |= ast_custom_function_register(&isnull_function);
00206    res |= ast_custom_function_register(&set_function);
00207    res |= ast_custom_function_register(&exists_function);
00208    res |= ast_custom_function_register(&if_function);
00209    res |= ast_custom_function_register(&if_time_function);
00210 
00211    return res;
00212 }

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

Definition at line 129 of file func_logic.c.

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

00131 {
00132    char *varname;
00133    char *val;
00134 
00135    varname = strsep(&data, "=");
00136    val = data;
00137 
00138    if (ast_strlen_zero(varname) || !val) {
00139       ast_log(LOG_WARNING, "Syntax SET(<varname>=[<value>])\n");
00140       return -1;
00141    }
00142 
00143    varname = ast_strip(varname);
00144    val = ast_strip(val);
00145    pbx_builtin_setvar_helper(chan, varname, val);
00146    ast_copy_string(buf, val, len);
00147 
00148    return 0;
00149 }

static int unload_module ( void   )  [static]

Definition at line 188 of file func_logic.c.

References ast_custom_function_unregister().

00189 {
00190    int res = 0;
00191 
00192    res |= ast_custom_function_unregister(&isnull_function);
00193    res |= ast_custom_function_unregister(&set_function);
00194    res |= ast_custom_function_unregister(&exists_function);
00195    res |= ast_custom_function_unregister(&if_function);
00196    res |= ast_custom_function_unregister(&if_time_function);
00197 
00198    return res;
00199 }


Variable Documentation

Definition at line 165 of file func_logic.c.

Definition at line 172 of file func_logic.c.

Definition at line 180 of file func_logic.c.

Definition at line 151 of file func_logic.c.

Definition at line 158 of file func_logic.c.


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