[gobject-introspection] giscanner: Define source and header filename extensions only once

[Dieter Verfaillie <dieterv src gnome org>]

commit b70fe6a5649ed037f2554ae13067fd9929d841f8
Author: Dieter Verfaillie <dieterv optionexplicit be>
Date:   Wed Apr 24 17:41:49 2013 +0200

    giscanner: Define source and header filename extensions only once
    
    Enables us to to use a more effecient list membership test
    instead of testing the end of some string multiple times.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=699533

 giscanner/scannermain.py   |    7 ++-----
 giscanner/sourcescanner.py |    7 +++++--
 2 files changed, 7 insertions(+), 7 deletions(-)
---
diff --git a/giscanner/scannermain.py b/giscanner/scannermain.py
index b068f6f..deefcf9 100755
--- a/giscanner/scannermain.py
+++ b/giscanner/scannermain.py
@@ -38,7 +38,7 @@ from giscanner.girparser import GIRParser
 from giscanner.girwriter import GIRWriter
 from giscanner.maintransformer import MainTransformer
 from giscanner.shlibs import resolve_shlibs
-from giscanner.sourcescanner import SourceScanner
+from giscanner.sourcescanner import SourceScanner, ALL_EXTS
 from giscanner.transformer import Transformer
 from . import utils
 
@@ -253,10 +253,7 @@ def extract_filenames(args):
     for arg in args:
         # We don't support real C++ parsing yet, but we should be able
         # to understand C API implemented in C++ files.
-        if (arg.endswith('.c') or arg.endswith('.cpp') or
-            arg.endswith('.cc') or arg.endswith('.cxx') or
-            arg.endswith('.h') or arg.endswith('.hpp') or
-            arg.endswith('.hxx')):
+        if os.path.splitext(arg)[1] in ALL_EXTS:
             if not os.path.exists(arg):
                 _error('%s: no such a file or directory' % (arg, ))
             # Make absolute, because we do comparisons inside scannerparser.c
diff --git a/giscanner/sourcescanner.py b/giscanner/sourcescanner.py
index bd84a60..a1103a1 100644
--- a/giscanner/sourcescanner.py
+++ b/giscanner/sourcescanner.py
@@ -32,6 +32,10 @@ with LibtoolImporter(None, None):
     else:
         from giscanner._giscanner import SourceScanner as CSourceScanner
 
+HEADER_EXTS = ['.h', '.hpp', '.hxx']
+SOURCE_EXTS = ['.c', '.cpp', '.cc', '.cxx']
+ALL_EXTS = SOURCE_EXTS + HEADER_EXTS
+
 (CSYMBOL_TYPE_INVALID,
  CSYMBOL_TYPE_ELLIPSIS,
  CSYMBOL_TYPE_CONST,
@@ -241,8 +245,7 @@ class SourceScanner(object):
 
         headers = []
         for filename in filenames:
-            if (filename.endswith('.c') or filename.endswith('.cpp') or
-                filename.endswith('.cc') or filename.endswith('.cxx')):
+            if os.path.splitext(filename)[1] in SOURCE_EXTS:
                 filename = os.path.abspath(filename)
                 self._scanner.lex_filename(filename)
             else: