Add example of JSON serialization on string

example/ex11-json-net.c

@@ -0,0 +1,79 @@
+// Based on https://github.com/nanopb/nanopb/blob/master/examples/simple/simple.c
+#include <stdio.h>
+
+#include "m-serial-json.h"
+#include "m-tuple.h"
+#include "m-string.h"
+
+// Define a structure with one field
+TUPLE_DEF2(SimpleMessage,
+           (lucky_number, int))
+
+int main(void)
+{
+  string_t buffer;
+  m_serial_return_code_t status;
+
+  string_init(buffer);
+  /* Encode our message */
+  {
+    SimpleMessage_t message;
+    SimpleMessage_init(message);
+    
+    /* Create a stream that will write to our buffer. */
+    m_serial_str_json_write_t stream;
+    m_serial_str_json_write_init(stream, buffer);
+        
+    /* Fill in the lucky number */
+    message->lucky_number = 13;
+        
+    /* Now we are ready to encode the message! */
+    status = SimpleMessage_out_serial(stream, message);
+    
+    /* Then just check for any errors.. */
+    if (status != M_SERIAL_OK_DONE)
+      {
+        printf("Encoding failed: %d\n", status);
+        return 1;
+      }
+
+    /* Clear the objets */
+    m_serial_str_json_write_clear(stream);
+    SimpleMessage_clear(message);
+  }
+  
+  /* Now we could transmit the message over network, store it in a file
+   * but we are doing it right now.
+   */
+  
+  {
+    /* Allocate another space for the decoded message. */
+    SimpleMessage_t message;
+    SimpleMessage_init(message);
+    
+    /* Create a stream that reads from the buffer. */
+    m_serial_str_json_read_t stream;
+    m_serial_str_json_read_init(stream, string_get_cstr(buffer));
+    
+    /* Now we are ready to decode the message. */
+    status = SimpleMessage_in_serial(message, stream);
+    
+    /* Check for errors... */
+    if (status != M_SERIAL_OK_DONE)
+      {
+        printf("Decoding failed: %d\n", status);
+        return 1;
+      }
+    
+    /* Print the data contained in the message. */
+    printf("Your lucky number was %d!\n", message->lucky_number);
+
+    /* Clear the objets */
+    m_serial_str_json_read_clear(stream);
+    SimpleMessage_clear(message);
+  }
+
+  string_clear(buffer);
+  
+  return 0;
+}