Add a convenience function pb_get_encoded_size()

[apps/agl-service-can-low-level.git] / pb.h

diff --git a/pb.h b/pb.h
index 76980e4..63d313d 100644 (file)
--- a/pb.h
+++ b/pb.h
@@ -10,6 +10,9 @@
  * uncommenting the lines, or on the compiler command line.      *
  *****************************************************************/
 
+/* Enable support for dynamically allocated fields */
+/* #define PB_ENABLE_MALLOC 1 */
+
 /* Define this if your CPU architecture is big endian, i.e. it
  * stores the most-significant byte first. */
 /* #define __BIG_ENDIAN__ 1 */
@@ -43,7 +46,7 @@
 
 /* Version of the nanopb library. Just in case you want to check it in
  * your own program. */
-#define NANOPB_VERSION nanopb-0.2.5-dev
+#define NANOPB_VERSION nanopb-0.2.7-dev
 
 /* Include all the system headers needed by nanopb. You will need the
  * definitions of the following:
@@ -63,6 +66,10 @@
 #include <stddef.h>
 #include <stdbool.h>
 #include <string.h>
+
+#ifdef PB_ENABLE_MALLOC
+#include <stdlib.h>
+#endif
 #endif
 
 /* Macro for defining packed structures (compiler dependent).
@@ -96,8 +103,14 @@
 #endif
 
 /* Compile-time assertion, used for checking compatible compilation options.
- * If this fails on your compiler for some reason, use #define STATIC_ASSERT
- * to disable it. */
+ * If this does not work properly on your compiler, use #define STATIC_ASSERT
+ * to disable it.
+ *
+ * But before doing that, check carefully the error message / place where it
+ * comes from to see if the error has a real cause. Unfortunately the error
+ * message is not always very clear to read, but you can see the reason better
+ * in the place where the STATIC_ASSERT macro was called.
+ */
 #ifndef STATIC_ASSERT
 #define STATIC_ASSERT(COND,MSG) typedef char STATIC_ASSERT_MSG(MSG, __LINE__, __COUNTER__)[(COND)?1:-1];
 #define STATIC_ASSERT_MSG(MSG, LINE, COUNTER) STATIC_ASSERT_MSG_(MSG, LINE, COUNTER)
@@ -210,7 +223,11 @@ struct _pb_field_t {
 PB_PACKED_STRUCT_END
 
 /* Make sure that the standard integer types are of the expected sizes.
- * All kinds of things may break otherwise.. atleast all fixed* types. */
+ * All kinds of things may break otherwise.. atleast all fixed* types.
+ *
+ * If you get errors here, it probably means that your stdint.h is not
+ * correct for your platform.
+ */
 STATIC_ASSERT(sizeof(int8_t) == 1, INT8_T_WRONG_SIZE)
 STATIC_ASSERT(sizeof(uint8_t) == 1, UINT8_T_WRONG_SIZE)
 STATIC_ASSERT(sizeof(int16_t) == 2, INT16_T_WRONG_SIZE)
@@ -224,21 +241,15 @@ STATIC_ASSERT(sizeof(uint64_t) == 8, UINT64_T_WRONG_SIZE)
  * It has the number of bytes in the beginning, and after that an array.
  * Note that actual structs used will have a different length of bytes array.
  */
+#define PB_BYTES_ARRAY_T(n) struct { size_t size; uint8_t bytes[n]; }
+#define PB_BYTES_ARRAY_T_ALLOCSIZE(n) ((size_t)n + offsetof(pb_bytes_array_t, bytes))
+
 struct _pb_bytes_array_t {
     size_t size;
     uint8_t bytes[1];
 };
 typedef struct _pb_bytes_array_t pb_bytes_array_t;
 
-/* Same, except for pointer-type fields. There is no need to variable struct
- * length in this case.
- */
-struct _pb_bytes_ptr_t {
-    size_t size;
-    uint8_t *bytes;
-};
-typedef struct _pb_bytes_ptr_t pb_bytes_ptr_t;
-
 /* This structure is used for giving the callback function.
  * It is stored in the message structure and filled in by the method that
  * calls pb_decode.
@@ -330,8 +341,23 @@ struct _pb_extension_t {
      * If this extension does not match a field, the next handler is
      * automatically called. */
     pb_extension_t *next;
+
+    /* The decoder sets this to true if the extension was found.
+     * Ignored for encoding. */
+    bool found;
 };
 
+/* Memory allocation functions to use. You can define pb_realloc and
+ * pb_free to custom functions if you want. */
+#ifdef PB_ENABLE_MALLOC
+#   ifndef pb_realloc
+#       define pb_realloc(ptr, size) realloc(ptr, size)
+#   endif
+#   ifndef pb_free
+#       define pb_free(ptr) free(ptr)
+#   endif
+#endif
+
 /* These macros are used to declare pb_field_t's in the constant array. */
 /* Size of a structure member, in bytes. */
 #define pb_membersize(st, m) (sizeof ((st*)0)->m)