NAME

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

SYNTAX

       #include <X11/Intrinsic.h>

       char *XtMalloc(Cardinal size);

       char *XtCalloc(Cardinal num, Cardinal size);

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

       void XtFree(char *ptr);

       type *XtNew(type);

       String XtNewString(String string);

       Cardinal XtAsprintf(char **new_string, const char *format, ...);

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.

       new_string
                 Specifies a pointer to write a newly allocated string to.

       format    Specifies a formatting string as defined by sprintf(3c)

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  initializes  the space to zero.  If there is insufficient memory 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 a new string which is a duplicate of string.  If there  is  insufficient
       memory  to  allocate  the  new block, or the argument is NULL XtNewString returns NULL. The memory can be
       freed with XtFree.

       The XtAsprintf function allocates space for a string large enough to hold the  string  specified  by  the
       sprintf(3c)  format  pattern  when  used  with  the  remaining arguments, and fills it with the formatted
       results.  The address of the allocated string is placed into the pointer passed as ret.   The  length  of
       the  string  (not  including  the terminating null byte) is returned.  If there is insufficient memory to
       allocate the new block, XtAsprintf calls XtErrorMsg.

SEE ALSO

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

X Version 11                                       libXt 1.2.1                                       XtMalloc(3)