#!/bin/sh

# reindent a libpng C source

# COPYRIGHT: Written by Glenn Randers-Pehrson, 2016.
# To the extent possible under law, the author has waived all copyright and
# related or neighboring rights to this work.  This work is published from:
# United States.

# Usage:
# reindent inputtabsize outputtabsize inputcontinuestring outputcontinuestring
#
# Assumes that continued lines begin with indentation plus one space, and
# that continued comments begin with indentation plus " *".
#
# eg, to change libpng coding style from 3-space indentation to 4-space
#
#  reindent 3 4 " " "  " < example.c > example.c_reindented

unexpand --first-only --t $1 | \
   sed -e "/^	$3[^\*]/{s/	$3/	$4/}" | \
   expand -t $2