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#!/usr/bin/env python
"""
This script searches through C++ source files and corrects all uses of
get and set in the deprecated Gamera 2.x style to the new Gamera 3.x
style. For example::
get(r, c)
will change to::
get(Point(c, r))
Note that this script uses regular expressions and is pretty naive
about its understanding of C++, and will replace any method .get or
.set (or ->get and ->set), not just those on Gamera Image objects, so
it is recommended to check the results with a visual diffing tool.
Usage on files::
$ ./replace_get_set source.hpp > source.hpp.new
or as a filter::
$ cat source.hpp | ./replace_get_set > source.hpp.new
"""
import re
import sys
get_regex = re.compile("(?:\.|(?:->))get\((?!P)(?P<a>.*?),(?P<space>\s+)(?P<b>.*?)\)")
set_regex = re.compile("(?:\.|(?:->))set\((?!P)(?P<a>.*?),(?P<space>\s+)(?P<b>.*?),(?P<space2>\s+)(?P<v>.*?)\)")
def migrate_get_and_set(input_data):
while 1:
get_match = get_regex.search(input_data)
set_match = set_regex.search(input_data)
if not get_match is None:
group = get_match.group
input_data = (input_data[:get_match.start()] +
"get(Point(%s,%s%s))" %
(group("b"), group("space"), group("a")) +
input_data[get_match.end():])
num_substitutions += 1
elif not set_match is None:
group = set_match.group
input_data = (input_data[:set_match.start()] +
"set(Point(%s,%s%s),%s%s)" %
(group("b"), group("space"),
group("a"), group("space2"),
group("v")) +
input_data[set_match.end():])
num_substitutions += 1
else:
break
return input_data
def migrate_get_and_set_streams(input_stream, output_stream):
output_stream.write(migrate_get_and_set(input_stream.read()))
def main():
from optparse import OptionParser
parser = OptionParser(usage = __doc__)
options, args = parser.parse_args()
if len(args) > 1:
parser.error("You must supply a single filename to filter.")
if len(args) == 0:
input_stream = sys.stdin
else:
input_stream = open(args[0], "r")
output_stream = sys.stdout
migrate_get_and_set_streams(input_stream, output_stream)
if __name__ == "__main__":
main()
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