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# 

# LSST Data Management System 

# Copyright 2017 AURA/LSST 

# 

# This product includes software developed by the 

# LSST Project (http://www.lsst.org/). 

# 

# This program is free software: you can redistribute it and/or modify 

# it under the terms of the GNU General Public License as published by 

# the Free Software Foundation, either version 3 of the License, or 

# (at your option) any later version. 

# 

# This program is distributed in the hope that it will be useful, 

# but WITHOUT ANY WARRANTY; without even the implied warranty of 

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

# GNU General Public License for more details. 

# 

# You should have received a copy of the LSST License Statement and 

# the GNU General Public License along with this program. If not, 

# see <http://www.lsstcorp.org/LegalNotices/>. 

# 

 

import re 

import lsst.afw.geom as afwGeom 

 

 

def bboxFromIraf(irafBBoxStr): 

"""Return a Box2I corresponding to an IRAF-style BBOX 

 

[x0:x1,y0:y1] where x0 and x1 are the one-indexed start and end columns, and correspondingly 

y0 and y1 are the start and end rows. 

""" 

 

mat = re.search(r"^\[([-\d]+):([-\d]+),([-\d]+):([-\d]+)\]$", irafBBoxStr) 

if not mat: 

raise RuntimeError("Unable to parse IRAF-style bbox \"%s\"" % irafBBoxStr) 

x0, x1, y0, y1 = [int(_) for _ in mat.groups()] 

 

return afwGeom.BoxI(afwGeom.PointI(x0 - 1, y0 - 1), afwGeom.PointI(x1 - 1, y1 - 1))