XtMalloc(3Xt)

NAME
       XtMalloc, XtCalloc, XtRealloc, XtFree, XtNew, XtNewString
       - memory management functions

SYNTAX
       char *XtMalloc(size);
             Cardinal size;

       char *XtCalloc(num, size);
             Cardinal num;
             Cardinal size;

       char *XtRealloc(ptr, num);
             char *ptr;
             Cardinal num;

       void XtFree(ptr);
             char *ptr;

       type *XtNew(type);
             type;

       String XtNewString(string);
             String string;

ARGUMENTS
       num       Specifies the number of bytes or array elements.

       ptr       Specifies a pointer to the old storage or to the
                 block of storage that is to be freed.

       size      Specifies the size of an array element (in
                 bytes) or the number of bytes desired.

       string    Specifies a previously declared string.

       type      Specifies a previously declared data type.

DESCRIPTION
       The XtMalloc functions returns a pointer to a block of
       storage of at least the specified size bytes.  If there is
       insufficient memory to allocate the new block, XtMalloc
       calls XtErrorMsg.

       The XtCalloc function allocates space for the specified
       number of array elements of the specified size and ini-
       tializes the space to zero.  If there is insufficient mem-
       ory to allocate the new block, XtCalloc calls XtErrorMsg.

       The XtRealloc function changes the size of a block of
       storage (possibly moving it).  Then, it copies the old
       contents (or as much as will fit) into the new block and
       frees the old block.  If there is insufficient memory to
       allocate the new block, XtRealloc calls XtErrorMsg.  If

       ptr is NULL, XtRealloc allocates the new storage without
       copying the old contents; that is, it simply calls
       XtMalloc.

       The XtFree function returns storage and allows it to be
       reused.  If ptr is NULL, XtFree returns immediately.

       XtNew returns a pointer to the allocated storage.  If
       there is insufficient memory to allocate the new block,
       XtNew calls XtErrorMsg.  XtNew is a convenience macro that
       calls XtMalloc with the following arguments specified:

       ((type *) XtMalloc((unsigned) sizeof(type))

       XtNewString returns a pointer to the allocated storage.
       If there is insufficient memory to allocate the new block,
       XtNewString calls XtErrorMsg.  XtNewString is a conve-
       nience macro that calls XtMalloc with the following argu-
       ments specified:

       (strcpy(XtMalloc((unsigned) strlen(str) + 1), str))

SEE ALSO
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface