NAME

tt_pattern_iarg_add − add a new integer argument to a pattern

SYNOPSIS

#include <Tt/tt_c.h>
Tt_status tt_pattern_iarg_add(Tt_pattern m,
Tt_mode n,
const char ∗vtype,
int value);

DESCRIPTION

The tt_pattern_iarg_add() function adds a new argument to a pattern and sets the value to a given integer.

Add all arguments before the pattern is registered with the ToolTalk service. 

The m argument is the opaque handle for the pattern involved in this operation.  The n argument specifies who (sender, handler, observers) writes and reads a message argument.  The following modes are defined:

TT_IN The argument is written by the sender and read by the handler and any observers. 

TT_OUT
The argument is written by the handler and read by the sender and any reply observers.

TT_INOUT
The argument is written by the sender and the handler and read by all.

The vtype argument describes the type of argument data being added.  NULL matches any value.  The value argument is the value to be added. 

Pattern arguments are positional paramaters, and thus will only match an incoming message if the arguments have the same type and position within the argument list of the incoming message. In order to match an argument which is not the first in a list of arguments, the programmer must use tt_pattern_arg_add(3) to register wildcard arguments for the intervening arguments between the first argument and the argument which it is desired to match on. Wildcard arguments should have the vtype of "ALL" and a value of NULL. Note that the  tt_pattern_iarg_add () should not be used to add wildcard arguments because NULL, or 0, is a valid number. 

RETURN VALUE

Upon successful completion, the tt_pattern_iarg_add() function returns the status of the operation as one of the following Tt_status values:

TT_OK
The operation completed successfully.

TT_ERR_MODE
The specified Tt_mode is invalid. 

TT_ERR_NOMP
The ttsession(1) process is not running and the ToolTalk service cannot restart it. 

TT_ERR_POINTER
The pointer passed does not point to an object of the correct type for this operation.

SEE ALSO

tt_c(5), tt_pattern_register(3). 

ToolTalk 1.3  —  Last change: 1 March 1996