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# This file is a part of the HiRISE DTM Importer for Blender
#
# Copyright (C) 2017 Arizona Board of Regents on behalf of the Planetary Image
# Research Laboratory, Lunar and Planetary Laboratory at the University of
# Arizona.
#
# 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 GNU General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
"""PVL Regular Expression Patterns"""
import re
# End of PVL File
END = re.compile(
r'\s* \bEND\b \s*', (re.VERBOSE + re.IGNORECASE)
)
# PVL Comment
COMMENT = re.compile(
r'/\* .*? \*/', (re.DOTALL + re.VERBOSE)
)
# PVL Statement
STATEMENT = re.compile(
r"""
\s* (?P<key>\w+) # Match a PVL key
\s* = \s* # Who knows how many spaces we encounter
(?P<val> # Match a PVL value
([+-]?\d+\.?\d*) # We could match a number
| (['"]?((\w+ \s*?)+)['"]?) # Or a string
)
(\s* <(?P<units>.*?) >)? # The value may have an associated unit
""", re.VERBOSE
)
# Integer Number
INTEGER = re.compile(
r"""
[+-]?(?<!\.)\b[0-9]+\b(?!\.[0-9])
""", re.VERBOSE
)
# Floating Point Number
FLOATING = re.compile(
r"""
[+-]?\b[0-9]*\.?[0-9]+
""", re.VERBOSE
)
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