5 files changed, 125 insertions, 0 deletions
diff --git a/examples/cmake_relpath/CMakeLists.txt b/examples/cmake_relpath/CMakeLists.txt
new file mode 100644
index 0000000..e7727d8
--- /dev/null
+++ b/examples/cmake_relpath/CMakeLists.txt
@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 2.8)
+project(NANOPB_CMAKE_SIMPLE C)
+
+set(CMAKE_MODULE_PATH ${CMAKE_CURRENT_SOURCE_DIR}/../../extra)
+find_package(Nanopb REQUIRED)
+include_directories(${NANOPB_INCLUDE_DIRS})
+
+nanopb_generate_cpp(PROTO_SRCS PROTO_HDRS RELPATH proto
+	proto/simple.proto proto/sub/unlucky.proto)
+
+include_directories(${CMAKE_CURRENT_BINARY_DIR})
+#add_custom_target(generate_proto_sources DEPENDS ${PROTO_SRCS} ${PROTO_HDRS})
+set_source_files_properties(${PROTO_SRCS} ${PROTO_HDRS}
+    PROPERTIES GENERATED TRUE)
+
+set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Werror -g -O0")
+
+add_executable(simple simple.c ${PROTO_SRCS} ${PROTO_HDRS})
diff --git a/examples/cmake_relpath/README.txt b/examples/cmake_relpath/README.txt
new file mode 100644
index 0000000..aa0f3f3
--- /dev/null
+++ b/examples/cmake_relpath/README.txt
@@ -0,0 +1,18 @@
+Nanopb example "simple" using CMake
+=======================
+
+This example is the same as the simple nanopb example but built using CMake.
+
+Example usage
+-------------
+
+On Linux, create a build directory and then call cmake:
+
+    nanopb/examples/cmake_simple$ mkdir build
+    nanopb/examples/cmake_simple$ cd build/
+    nanopb/examples/cmake_simple/build$ cmake ..
+    nanopb/examples/cmake_simple/build$ make
+
+After that, you can run it with the command: ./simple
+
+On other platforms supported by CMake, refer to CMake instructions.
diff --git a/examples/cmake_relpath/proto/simple.proto b/examples/cmake_relpath/proto/simple.proto
new file mode 100644
index 0000000..3bf4ad1
--- /dev/null
+++ b/examples/cmake_relpath/proto/simple.proto
@@ -0,0 +1,11 @@
+// A very simple protocol definition, consisting of only
+// one message.
+syntax = "proto2";
+
+import "sub/unlucky.proto";
+
+message SimpleMessage {
+    required int32 lucky_number = 1;
+    required UnluckyNumber unlucky = 2;
+}
+
diff --git a/examples/cmake_relpath/proto/sub/unlucky.proto b/examples/cmake_relpath/proto/sub/unlucky.proto
new file mode 100644
index 0000000..97a42c9
--- /dev/null
+++ b/examples/cmake_relpath/proto/sub/unlucky.proto
@@ -0,0 +1,5 @@
+syntax = "proto2";
+
+message UnluckyNumber {
+	required uint32 number = 1;
+}
diff --git a/examples/cmake_relpath/simple.c b/examples/cmake_relpath/simple.c
new file mode 100644
index 0000000..231886c
--- /dev/null
+++ b/examples/cmake_relpath/simple.c
@@ -0,0 +1,73 @@
+#include <stdio.h>
+#include <pb_encode.h>
+#include <pb_decode.h>
+#include "simple.pb.h"
+
+int main()
+{
+    /* This is the buffer where we will store our message. */
+    uint8_t buffer[128];
+    size_t message_length;
+    bool status;
+    
+    /* Encode our message */
+    {
+        /* Allocate space on the stack to store the message data.
+         *
+         * Nanopb generates simple struct definitions for all the messages.
+         * - check out the contents of simple.pb.h!
+         * It is a good idea to always initialize your structures
+         * so that you do not have garbage data from RAM in there.
+         */
+        SimpleMessage message = SimpleMessage_init_zero;
+        
+        /* Create a stream that will write to our buffer. */
+        pb_ostream_t stream = pb_ostream_from_buffer(buffer, sizeof(buffer));
+        
+        /* Fill in the lucky number */
+        message.lucky_number = 13;
+        message.unlucky.number = 42;
+        
+        /* Now we are ready to encode the message! */
+        status = pb_encode(&stream, SimpleMessage_fields, &message);
+        message_length = stream.bytes_written;
+        
+        /* Then just check for any errors.. */
+        if (!status)
+        {
+            printf("Encoding failed: %s\n", PB_GET_ERROR(&stream));
+            return 1;
+        }
+    }
+    
+    /* Now we could transmit the message over network, store it in a file or
+     * wrap it to a pigeon's leg.
+     */
+
+    /* But because we are lazy, we will just decode it immediately. */
+    
+    {
+        /* Allocate space for the decoded message. */
+        SimpleMessage message = SimpleMessage_init_zero;
+        
+        /* Create a stream that reads from the buffer. */
+        pb_istream_t stream = pb_istream_from_buffer(buffer, message_length);
+        
+        /* Now we are ready to decode the message. */
+        status = pb_decode(&stream, SimpleMessage_fields, &message);
+        
+        /* Check for errors... */
+        if (!status)
+        {
+            printf("Decoding failed: %s\n", PB_GET_ERROR(&stream));
+            return 1;
+        }
+        
+        /* Print the data contained in the message. */
+        printf("Your lucky number was %d!\n", message.lucky_number);
+        printf("Your unlucky number was %u!\n", message.unlucky.number);
+    }
+    
+    return 0;
+}
+