Add --c-style command line option for naming style (#199, #533, #791)

This option converts the type names from .proto files to a style
that is commonly used in C code. Enum entries are in upper case,
and camel case is converted to underscore separated names.

4 files changed, 112 insertions, 0 deletions

diff --git a/tests/namingstyle/SConscript b/tests/namingstyle/SConscript
new file mode 100644
index 0000000..d92f92d
--- /dev/null
+++ b/tests/namingstyle/SConscript
@@ -0,0 +1,11 @@
+# Test namingstyle option
+
+Import('env')
+
+env = env.Clone()
+env.Replace(NANOPBFLAGS = "-C")
+
+env.NanopbProto(["naming_style", "naming_style.options"])
+
+test = env.Program(["test_naming_style_c.c", "naming_style.pb.c", '$COMMON/pb_common.o'])
+env.RunTest(test)
diff --git a/tests/namingstyle/naming_style.options b/tests/namingstyle/naming_style.options
new file mode 100644
index 0000000..8643e5b
--- /dev/null
+++ b/tests/namingstyle/naming_style.options
@@ -0,0 +1,14 @@
+* long_names:true
+* enum_to_string:true
+
+MainMessage.repeatedNumber  max_count:4, fixed_count:true
+MainMessage.string_Values1  type:FT_POINTER
+MainMessage.stringValues2   max_length:40, max_count:5
+MainMessage.repeatedFixed32 max_count:10
+MainMessage.requiredBytes1  max_size:10, fixed_length:true
+MainMessage.requiredBytes2  max_size:10
+MainMessage.repeatedBytes1  type:FT_POINTER
+MainMessage.repeatedBytes2  type:FT_POINTER, fixed_count:true, max_count:5
+MainMessage.repeatedInts    type:FT_POINTER
+MainMessage.SUB_MESSAGE2    type:FT_CALLBACK
+MainMessage.oneOfName2      anonymous_oneof:true
diff --git a/tests/namingstyle/naming_style.proto b/tests/namingstyle/naming_style.proto
new file mode 100644
index 0000000..7e626e8
--- /dev/null
+++ b/tests/namingstyle/naming_style.proto
@@ -0,0 +1,62 @@
+syntax = "proto2";
+
+enum MyEnum1 {
+  ENTRY_FIRST   = 0;
+  ENTRY_Second  = 1;
+  EnumThird     = 2;
+}
+
+enum MY_ENUM2 {
+  ENUM2_ENTRY = 0;
+}
+
+message SubMessage {
+  optional int32 test_value = 1;
+}
+
+message MainMessage {
+  optional int32      LUCKY_number    = 1;
+  required int32      REQUIRED_NUMBER = 2;
+  repeated int32      repeatedNumber  = 3;
+  repeated int32      repeatedInts    = 4;
+
+  optional MyEnum1    MyEnum1         = 5;
+  optional MY_ENUM2   My_Enum2        = 6;
+  required MY_ENUM2   MY_ENUM3        = 7;
+  repeated MY_ENUM2   MY_ENUM4        = 8;
+
+  repeated string     string_Values1  = 9;
+  repeated string     stringValues2   = 10;
+  optional string     OPTIONAL_String = 11;
+  required string     requiredString  = 12;
+
+  repeated fixed32    repeatedFixed32 = 13;
+
+  required bytes      requiredBytes1  = 14;
+  required bytes      requiredBytes2  = 15;
+  repeated bytes      repeatedBytes1  = 16;
+  repeated bytes      repeatedBytes2  = 17;
+
+  optional SubMessage subMessage1     = 18;
+  repeated SubMessage SUB_MESSAGE2    = 19;
+  required SubMessage sub_message3    = 20;
+
+  oneof oneOfName {
+    SubMessage testMessage1 = 21;
+    SubMessage testMessage2 = 22;
+  }
+
+  oneof oneOfName2 {
+    SubMessage testMessage4 = 23;
+    SubMessage testMessage5 = 24;
+  }
+
+  extensions 200 to 255;
+}
+
+message TestExtension {
+  extend MainMessage {
+      optional TestExtension testExtension = 250;
+  }
+  optional string stringValue = 1;
+}
diff --git a/tests/namingstyle/test_naming_style_c.c b/tests/namingstyle/test_naming_style_c.c
new file mode 100644
index 0000000..a3d15fd
--- /dev/null
+++ b/tests/namingstyle/test_naming_style_c.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <stdbool.h>
+#include <string.h>
+#include <assert.h>
+#include "unittests.h"
+#include "naming_style.pb.h"
+
+int main()
+{
+    main_message_t message = MAIN_MESSAGE_INIT_ZERO;
+
+    message.lucky_number = 13;
+    message.my_enum1 = MY_ENUM1_ENUM_THIRD;
+    message.my_enum2 = MY_ENUM2_ENUM2_ENTRY;
+    message.one_of_name.test_message2.has_test_value = true;
+    message.one_of_name.test_message2.test_value = 5;
+    message.which_one_of_name = 1;
+    message.repeated_fixed32[0] = 1;
+    message.test_message5.test_value = 5;
+
+    assert(strcmp("ENTRY_FIRST", my_enum1_name(MY_ENUM1_ENTRY_FIRST)) == 0);
+
+    (void)message.lucky_number;
+    return 0;
+}