added a simple function for parsing toolpath settings from stl and gcode files

git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@396 bbaffbd6-741e-11dd-a85d-61de82d9cad9

pycam/Importers/ToolpathSettingsParser.py

+# -*- coding: utf-8 -*-
+"""
+$Id$
+
+Copyright 2010 Lars Kruse <devel@sumpfralle.de>
+
+This file is part of PyCAM.
+
+PyCAM 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.
+
+PyCAM 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 PyCAM.  If not, see <http://www.gnu.org/licenses/>.
+"""
+
+import pycam.Gui.Settings
+import pycam.Gui.Project
+import re
+import os
+import sys
+
+COMMENT_CHARACTERS = r";#"
+REGEX_META_KEYWORDS = r"[%s]?%s (.*): (.*)$" % (COMMENT_CHARACTERS, pycam.Gui.Project.ProjectGui.META_DATA_PREFIX)
+REGEX_SETTINGS_START = r"[%s]?%s$" % (COMMENT_CHARACTERS, pycam.Gui.Settings.ToolpathSettings.META_MARKER_START)
+REGEX_SETTINGS_END = r"[%s]?%s$" % (COMMENT_CHARACTERS, pycam.Gui.Settings.ToolpathSettings.META_MARKER_END)
+
+
+def parseToolpathSettings(filename):
+    keywords = {}
+    in_meta_zone = False
+    meta_content = []
+    try:
+        f = open(filename,"r")
+    except IOError, err_msg:
+        print >>sys.stderr, "Failed to read file (%s): %s" % (filename, err_msg)
+        return None
+    for line in f.readlines():
+        match = re.match(REGEX_META_KEYWORDS, line)
+        if match:
+            keywords[match.groups()[0]] = match.groups()[1].strip()
+        if in_meta_zone:
+            if re.match(REGEX_SETTINGS_END, line):
+                in_meta_zone = False
+            else:
+                if line and line[0] in COMMENT_CHARACTERS:
+                    meta_content[-1].append(line[1:].strip())
+        else:
+            if re.match(REGEX_SETTINGS_START, line):
+                in_meta_zone = True
+                meta_content.append([])
+    return keywords, [os.linesep.join(one_block) for one_block in meta_content]
+
+if __name__ == "__main__":
+    print "\n#########################\n".join(parseToolpathSettings(sys.argv[1])[1])
+