/[emacs]/emacs/src/undo.c
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revision 1.64 by rms, Sat Jan 29 17:16:31 2005 UTC revision 1.65 by teirllm, Sun Jan 30 00:39:33 2005 UTC
# Line 639  which includes both saved text and other Line 639  which includes both saved text and other
639    DEFVAR_LISP ("undo-outer-limit", &Vundo_outer_limit,    DEFVAR_LISP ("undo-outer-limit", &Vundo_outer_limit,
640                doc: /* Outer limit on size of undo information for one command.                doc: /* Outer limit on size of undo information for one command.
641  At garbage collection time, if the current command has produced  At garbage collection time, if the current command has produced
642  more than this much undo information, it asks you whether to delete  more than this much undo information, it discards the info and displays
643  the information.  This is a last-ditch limit to prevent memory overflow.  a warning.  This is a last-ditch limit to prevent memory overflow.
644    
645  The size is counted as the number of bytes occupied,  The size is counted as the number of bytes occupied, which includes
646  which includes both saved text and other data.  both saved text and other data.  A value of nil means no limit.  In
647    this case, accumulating one huge undo entry could make Emacs crash as
648    a result of memory overflow.
649    
650  In fact, this calls the function which is the value of  In fact, this calls the function which is the value of
651  `undo-outer-limit-function' with one argument, the size.  `undo-outer-limit-function' with one argument, the size.

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