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.\" Except as contained in this notice, the name of the X Consortium shall

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.\"

.ds xT X Toolkit Intrinsics \- C Language Interface

.ds xW Athena X Widgets \- C Language X Toolkit Interface

.ds xL Xlib \- C Language X Interface

.ds xC Inter-Client Communication Conventions Manual

.na

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.ny0

.TH XSaveContext __libmansuffix__ __xorgversion__ "XLIB FUNCTIONS"

.SH NAME

XSaveContext, XFindContext, XDeleteContext, XUniqueContext \- associative look-up routines

.SH SYNTAX

.HP

int XSaveContext(\^Display *\fIdisplay\fP\^, XID \fIrid\fP\^, XContext

\fIcontext\fP\^, XPointer \fIdata\fP\^); 

.HP

int XFindContext(\^Display *\fIdisplay\fP\^, XID \fIrid\fP\^, XContext

\fIcontext\fP\^, XPointer *\fIdata_return\fP\^); 

.HP

int XDeleteContext(\^Display *\fIdisplay\fP\^, XID \fIrid\fP, XContext

\fIcontext\fP); 

.LP

XContext XUniqueContext(void); 

.SH ARGUMENTS

.IP \fIcontext\fP 1i

Specifies the context type to which the data belongs. 

.IP \fIdata\fP 1i

Specifies the data to be associated with the window and type.

.IP \fIdata_return\fP 1i

Returns the data.

.IP \fIdisplay\fP 1i

Specifies the connection to the X server.

.IP \fIrid\fP 1i

Specifies the resource ID with which the data is associated.

.SH DESCRIPTION

If an entry with the specified resource ID and type already exists,

.ZN XSaveContext

overrides it with the specified context.

The

.ZN XSaveContext

function returns a nonzero error code if an error has occurred

and zero otherwise.

Possible errors are

.ZN XCNOMEM

(out of memory).

.LP

Because it is a return value,

the data is a pointer.

The

.ZN XFindContext

function returns a nonzero error code if an error has occurred

and zero otherwise.

Possible errors are

.ZN XCNOENT

(context-not-found).

.LP

The

.ZN XDeleteContext

function deletes the entry for the given resource ID 

and type from the data structure.

This function returns the same error codes that

.ZN XFindContext

returns if called with the same arguments.

.ZN XDeleteContext

does not free the data whose address was saved.

.LP

The

.ZN XUniqueContext

function creates a unique context type that may be used in subsequent calls to

.ZN XSaveContext .

.SH "SEE ALSO"

\fI\*(xL\fP