Improve .proto options parsing.

Options can now be defined on command line, file, message or in field
scope.

Update issue 12
Status: Started

tests/Makefile

@@ -55,7 +55,7 @@ coverage: run_unittests
 	gcov pb_encode.gcda
 	gcov pb_decode.gcda
 
-run_unittests: decode_unittests encode_unittests test_cxxcompile test_encode1 test_encode2 test_encode3 test_decode1 test_decode2 test_decode3 test_encode_callbacks test_decode_callbacks test_missing_fields
+run_unittests: decode_unittests encode_unittests test_cxxcompile test_encode1 test_encode2 test_encode3 test_decode1 test_decode2 test_decode3 test_encode_callbacks test_decode_callbacks test_missing_fields test_options
 	rm -f *.gcda
 	
 	./decode_unittests > /dev/null
@@ -82,5 +82,13 @@ run_unittests: decode_unittests encode_unittests test_cxxcompile test_encode1 te
 	
 	./test_missing_fields
 
+test_options: options.pb.h options.expected
+	for p in $$(grep . options.expected); do \
+	    if ! grep -qF "$$p" $<; then \
+	        echo Expected: $$p; \
+	        exit 1; \
+	    fi \
+	done
+
 run_fuzztest: test_decode2
 	bash -c 'I=1; while true; do cat /dev/urandom | ./test_decode2 > /dev/null; I=$$(($$I+1)); echo -en "\r$$I"; done'

tests/options.expected

@@ -0,0 +1,3 @@
+char filesize[20];
+char msgsize[30];
+char fieldsize[40];

tests/options.proto

@@ -0,0 +1,28 @@
+/* Test nanopb option parsing.
+ * options.expected lists the patterns that are searched for in the output.
+ */
+
+import "nanopb.proto";
+
+// File level options
+option (nanopb_fileopt).max_size = 20;
+
+message Message1
+{
+    required string filesize = 1;
+}
+
+// Message level options
+message Message2
+{
+    option (nanopb_msgopt).max_size = 30;
+    required string msgsize = 1;
+}
+
+// Field level options
+message Message3
+{
+    required string fieldsize = 1 [(nanopb).max_size = 40];
+}
+
+