#!MUNGERPATH

; Copyright (c) 2001, 2002, 2003, James Bailie <jimmy@mammothcheese.ca>.
; All rights reserved.
; 
; Redistribution and use in source form, with or without
; modification, are permitted provided that the following conditions are met:
; 
;     * Redistributions of source code must retain the above copyright
; notice, this list of conditions and the following disclaimer.
;     * The name of James Bailie may not be used to endorse or promote 
; products derived from this software without specific prior written permission.
; 
; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS IS"
; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
; ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
; LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
; CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
; SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
; INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
; CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
; ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
; POSSIBILITY OF SUCH DAMAGE.

; Usage: grep.munger [-n] pattern [filename...]

(fatal)

(load (join "/" (libdir) "options.munger"))
(getopt "n")
(setq enum (lookup options "n"))

(unless (next)
   (die "pattern missing"))

(when (stringp (setq rx (regcomp (current))))
   (die rx))

(setq count 0)
(setq file "stdin")

(if (next)
   (do
      (setq file (current))
      (setq count 0)
      
      (with_input_file file
         (while (setq line (getline))
            (inc count)
            (when (match rx line)
               (when file (print file ": "))
               (when enum (print count ": "))
               (print line))))
   
      (next))
   
   (while (setq line (getline))
      (inc count)
      (when (match rx line)
         (when file (print file ": "))
         (when enum (print count ": "))
         (print line))))
   
(exit 0)
