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XtMalloc(3Xt)                        SysV                        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 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 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 - C Language Interface
     Xlib - C Language X Interface