Summary

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	File:     patch.icn

	Subject:  Procedures for UNIX-like patch(1)

	Author:   Rich Morin

	Date:     June 18, 1990

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   This file is in the public domain.

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  This procedure produces a sequence of edited items, reading a source
  stream (from) and a stream of difference records (diffs), as generated
  by dif.icn.

  An optional parameter (rev) causes the edits to be made in reverse.
  This allows an old stream to be regenerated from a new stream and an
  appropriate stream of difference records.

  The original patch(1) utility was written by Larry Wall, and is used
  widely in the UNIX community.  See also diffu.icn and patchu.icn, the
  utility program versions of dif.icn and patch.icn.

  Usage:	patch(old, diff)	# patch old to new via diff
  		patch(new, diff, rev)	# patch new to old via diff

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  Requires: co-expressions

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This file is part of the (main) package.

patch(from, diff, rev)

zot_patch(msg)

 exit w/ message