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.hw XImage
.TH XpmMisc 3 "libXpm 3.5.17" "X Version 11" "libXpm functions"
.SH NAME
XpmMisc \- xpm misc functions to free used memory and handle errors
.SH SYNOPSIS
.nf
.HP
.BI "int XpmFreeXpmImage(XpmImage *" image );
.HP
.BI "int XpmFreeXpmInfo(XpmInfo *" info );
.HP
.BI "int XpmFreeAttributes(XpmAttributes *" attributes );
.HP
.B "int XpmAttributesSize(void);"
.HP
.BI "int XpmFreeExtensions(XpmExtension *" extensions ",  int " nextensions );
.HP
.BI "int XpmFree(char *" ptr );
.HP
.BI "char *XpmGetErrorString(int " errorcode );
.HP
.B "int XpmLibraryVersion(void);"
.fi
.SH ARGUMENTS

.IP \fIimage\fP li
Specifies the structure to free
.IP \fIinfo\fP li
Specifies the structure to free
.IP \fIptr\fP li
Specifies the data to free
.IP \fIerrorcode\fP li
Specifies the XPM error
.IP \fIextensions\fP li
Specifies the array to free
.IP \fInextensions\fP li
Specifies the number of extensions
.IP \fIattributes\fP li
Specifies the structure to free

.SH DESCRIPTION
.PP
To free possible data stored into an XpmImage structure use
.BR XpmFreeXpmImage ().
The
.BR XpmFreeXpmImage ()
function frees the structure members which are not NULL,
but not the structure itself.
.PP
To free possible data stored into an XpmInfo structure use
.BR XpmFreeXpmInfo().
.PP
To free data possibly stored into an array of XpmExtension use
.BR XpmFreeExtensions ().
.PP
To free any data allocated by an XPM function use the
.BR XpmFree ()
function.
The current distribution of the XPM library uses the standard memory allocation
functions and thus
.BR XpmFree ()
is nothing else than a define to the standard
.BR free (3).
However since these functions may be redefined in specific environments
it is wise to use
.BR XpmFree ()
.PP
To free possible data stored into an XpmAttributes structure use
.BR XpmFreeAttributes ().
The
.BR XpmFreeAttributes ()
function frees the structure members which have been malloc’ed
such as the pixels list.
.PP
To dynamically allocate an XpmAttributes structure use the
.BR XpmAttributesSize ()
function.
The
.BR XpmAttributesSize ()
function provides applications using dynamic libraries with a safe way to
allocate and then refer to an XpmAttributes structure, disregarding whether
the XpmAttributes structure size has changed or not since compiled.
.PP
To get data when building an error message, one can use
.BR XpmGetErrorString ().
.BR XpmGetErrorString ()
returns a string related to the given XPM error code.
.PP
The
.BR XpmLibraryVersion ()
function can be used when one needs to figure out which version of the library
is in use.
The value returned by
.BR XpmLibraryVersion ()
can be compared to the value of
.B XpmIncludeVersion
which is defined in the header file "xpm.h".
These numbers are computed with the following formula:

.nf
 (XpmFormat * 100 + XpmVersion) * 100 + XpmRevision
.fi

where
.B XpmFormat
is the version number of the format,
.B XpmVersion
is the library version number (which changes only if the API changes), and
.B XpmRevision
is the library minor version number.
.PP
The
.BR XpmFreeExtensions ()
function frees all data stored in every extension and the array itself.
Note that
.BR XpmFreeAttributes ()
calls this function and thus most of the time it should not need to be
explicitly called.

.SH "SEE ALSO"
.ad l
.nh
.BR XpmCreateBuffer (3),
.BR XpmCreateData (3),
.BR XpmCreateImage (3),
.BR XpmCreatePixmap (3),
.BR XpmCreateXpmImage (3),
.BR XpmRead (3),
.BR XpmWrite (3)