#!/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 with 4-space

# continuations to 4-space indentation with 2-space continuations:

#

# reindent 3 4 "\t " " " < example.c > example.c_4_2

# and to restore the file back to libpng coding style

# reindent 4 3 " " " " < example.c_4_2 > example.c_3_4

unexpand --first-only --t $1 | \

sed -e "/^ *$3[^\*]/{s/$3/$4/}" | \

expand -t $2