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     XtMalloc(3Xt)                                  XtMalloc(3Xt)



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

     SYNOPSIS
          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
          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



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     XtMalloc(3Xt)                                  XtMalloc(3Xt)



          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
          convenience macro that calls XtMalloc with the
          following arguments specified:

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

     SEE ALSO
          X Toolkit Intrinsics Programming Manual
          Xlib Programming Manual

























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