From fb0f6ed5eada02ca13fef60bcde8b216f39eb7f8 Mon Sep 17 00:00:00 2001
From: Thomas Nagy <tnagy2pow10@gmail.com>
Date: Sun, 5 Aug 2012 01:33:11 +0200
Subject: [PATCH] Issue 1186

---
 waflib/Tools/c_preproc.py |  4 +--
 waflib/Tools/winres.py    | 65 ++++++++++++++++++++++++++++++++++++++-
 2 files changed, 66 insertions(+), 3 deletions(-)

diff --git a/waflib/Tools/c_preproc.py b/waflib/Tools/c_preproc.py
index 63b902c4..945644e3 100644
--- a/waflib/Tools/c_preproc.py
+++ b/waflib/Tools/c_preproc.py
@@ -26,8 +26,8 @@ A dumb preprocessor is also available in the tool *c_dumbpreproc*
 """
 # TODO: more varargs, pragma once
 
-import re, sys, os, string, traceback
-from waflib import Logs, Build, Utils, Errors
+import re, string, traceback
+from waflib import Logs, Utils, Errors
 from waflib.Logs import debug, error
 
 class PreprocError(Errors.WafError):
diff --git a/waflib/Tools/winres.py b/waflib/Tools/winres.py
index f54c090a..ddddd949 100644
--- a/waflib/Tools/winres.py
+++ b/waflib/Tools/winres.py
@@ -4,8 +4,10 @@
 
 "Process *.rc* files for C/C++: X{.rc -> [.res|.rc.o]}"
 
-from waflib import Task
+import re, traceback
+from waflib import Task, Logs, Utils
 from waflib.TaskGen import extension
+from waflib.Tools import c_preproc
 
 @extension('.rc')
 def rc_file(self, node):
@@ -21,6 +23,56 @@ def rc_file(self, node):
 	except AttributeError:
 		self.compiled_tasks = [rctask]
 
+re_lines = re.compile(
+	'(?:^[ \t]*(#|%:)[ \t]*(ifdef|ifndef|if|else|elif|endif|include|import|define|undef|pragma)[ \t]*(.*?)\s*$)|'\
+	'(?:^\w+[ \t]*(ICON|BITMAP|CURSOR|HTML|FONT|MESSAGETABLE|TYPELIB|REGISTRY|D3DFX)[ \t]*(.*?)\s*$)',
+	re.IGNORECASE | re.MULTILINE)
+
+class rc_parser(c_preproc.c_parser):
+	def filter_comments(self, filepath):
+		code = Utils.readf(filepath)
+		if c_preproc.use_trigraphs:
+			for (a, b) in c_preproc.trig_def: code = code.split(a).join(b)
+		code = c_preproc.re_nl.sub('', code)
+		code = c_preproc.re_cpp.sub(c_preproc.repl, code)
+		ret = []
+		for m in re.finditer(re_lines, code):
+			if m.group(2):
+				ret.append((m.group(2), m.group(3)))
+			else:
+				ret.append(('include', m.group(5)))
+		return ret
+
+	def addlines(self, node):
+		self.currentnode_stack.append(node.parent)
+		filepath = node.abspath()
+
+		self.count_files += 1
+		if self.count_files > c_preproc.recursion_limit:
+			raise c_preproc.PreprocError("recursion limit exceeded")
+		pc = self.parse_cache
+		Logs.debug('preproc: reading file %r', filepath)
+		try:
+			lns = pc[filepath]
+		except KeyError:
+			pass
+		else:
+			self.lines.extend(lns)
+			return
+
+		try:
+			lines = self.filter_comments(filepath)
+			lines.append((c_preproc.POPFILE, ''))
+			lines.reverse()
+			pc[filepath] = lines
+			self.lines.extend(lines)
+		except IOError:
+			raise c_preproc.PreprocError("could not read the file %s" % filepath)
+		except Exception:
+			if Logs.verbose > 0:
+				Logs.error("parsing %s failed" % filepath)
+				traceback.print_exc()
+
 class winrc(Task.Task):
 	"""
 	Task for compiling resource files
@@ -28,6 +80,17 @@ class winrc(Task.Task):
 	run_str = '${WINRC} ${WINRCFLAGS} ${CPPPATH_ST:INCPATHS} ${DEFINES_ST:DEFINES} ${WINRC_TGT_F} ${TGT} ${WINRC_SRC_F} ${SRC}'
 	color   = 'BLUE'
 
+	def scan(self):
+		tmp = rc_parser(self.generator.includes_nodes)
+		tmp.start(self.inputs[0], self.env)
+		nodes = tmp.nodes
+		names = tmp.names
+
+		if Logs.verbose:
+			Logs.debug('deps: deps for %s: %r; unresolved %r' % (str(self), nodes, names))
+
+		return (nodes, names)
+
 def configure(conf):
 	"""
 	Detect the programs RC or windres, depending on the C/C++ compiler in use