Merge branch 'dev-0.2'

1 files changed, 125 insertions, 55 deletions

diff --git a/pb.h b/pb.h
index bca31022..dd06c69b 100644
--- a/pb.h
+++ b/pb.h
@@ -6,7 +6,7 @@
  * see pb_encode.h or pb_decode.h
  */
 
-#define NANOPB_VERSION nanopb-0.1.9.1-dev
+#define NANOPB_VERSION nanopb-0.2.0-dev
 
 #include <stdint.h>
 #include <stddef.h>
@@ -53,60 +53,55 @@
  * SINT* is different, though, because it is zig-zag coded.
  */
 
-typedef enum {
-    /************************
-     * Field contents types *
-     ************************/
-    
-    /* Numeric types */
-    PB_LTYPE_VARINT = 0x00, /* int32, uint32, int64, uint64, bool, enum */
-    PB_LTYPE_SVARINT = 0x01, /* sint32, sint64 */
-    PB_LTYPE_FIXED32 = 0x02, /* fixed32, sfixed32, float */
-    PB_LTYPE_FIXED64 = 0x03, /* fixed64, sfixed64, double */
-    
-    /* Marker for last packable field type. */
-    PB_LTYPE_LAST_PACKABLE = 0x03,
-    
-    /* Byte array with pre-allocated buffer.
-     * data_size is the length of the allocated PB_BYTES_ARRAY structure. */
-    PB_LTYPE_BYTES = 0x04,
-    
-    /* String with pre-allocated buffer.
-     * data_size is the maximum length. */
-    PB_LTYPE_STRING = 0x05,
-    
-    /* Submessage
-     * submsg_fields is pointer to field descriptions */
-    PB_LTYPE_SUBMESSAGE = 0x06,
-    
-    /* Number of declared LTYPES */
-    PB_LTYPES_COUNT = 7,
-    PB_LTYPE_MASK = 0x0F,
-    
-    /******************
-     * Modifier flags *
-     ******************/
-    
-    /* Just the basic, write data at data_offset */
-    PB_HTYPE_REQUIRED = 0x00,
-    
-    /* Write true at size_offset */
-    PB_HTYPE_OPTIONAL = 0x10,
-    
-    /* Read to pre-allocated array
-     * Maximum number of entries is array_size,
-     * actual number is stored at size_offset */
-    PB_HTYPE_ARRAY = 0x20,
-    
-    /* Works for all required/optional/repeated fields.
-     * data_offset points to pb_callback_t structure.
-     * LTYPE should be valid or 0 (it is ignored, but
-     * sometimes used to speculatively index an array). */
-    PB_HTYPE_CALLBACK = 0x30,
-    
-    PB_HTYPE_MASK = 0xF0
-} pb_packed pb_type_t;
+typedef uint8_t pb_type_t;
+
+/************************
+ * Field contents types *
+ ************************/
+
+/* Numeric types */
+#define PB_LTYPE_VARINT 0x00 /* int32, uint32, int64, uint64, bool, enum */
+#define PB_LTYPE_SVARINT 0x01 /* sint32, sint64 */
+#define PB_LTYPE_FIXED32 0x02 /* fixed32, sfixed32, float */
+#define PB_LTYPE_FIXED64 0x03 /* fixed64, sfixed64, double */
+
+/* Marker for last packable field type. */
+#define PB_LTYPE_LAST_PACKABLE 0x03
+
+/* Byte array with pre-allocated buffer.
+ * data_size is the length of the allocated PB_BYTES_ARRAY structure. */
+#define PB_LTYPE_BYTES 0x04
 
+/* String with pre-allocated buffer.
+ * data_size is the maximum length. */
+#define PB_LTYPE_STRING 0x05
+
+/* Submessage
+ * submsg_fields is pointer to field descriptions */
+#define PB_LTYPE_SUBMESSAGE 0x06
+
+/* Number of declared LTYPES */
+#define PB_LTYPES_COUNT 7
+#define PB_LTYPE_MASK 0x0F
+
+/**************************
+ * Field repetition rules *
+ **************************/
+
+#define PB_HTYPE_REQUIRED 0x00
+#define PB_HTYPE_OPTIONAL 0x10
+#define PB_HTYPE_REPEATED 0x20
+#define PB_HTYPE_MASK     0x30
+
+/********************
+ * Allocation types *
+ ********************/
+ 
+#define PB_ATYPE_STATIC   0x00
+#define PB_ATYPE_CALLBACK 0x40
+#define PB_ATYPE_MASK     0xC0
+
+#define PB_ATYPE(x) ((x) & PB_ATYPE_MASK)
 #define PB_HTYPE(x) ((x) & PB_HTYPE_MASK)
 #define PB_LTYPE(x) ((x) & PB_LTYPE_MASK)
 
@@ -204,9 +199,84 @@ typedef enum {
 #define pb_membersize(st, m) (sizeof ((st*)0)->m)
 #define pb_arraysize(st, m) (pb_membersize(st, m) / pb_membersize(st, m[0]))
 #define pb_delta(st, m1, m2) ((int)offsetof(st, m1) - (int)offsetof(st, m2))
-#define pb_delta_end(st, m1, m2) (offsetof(st, m1) - offsetof(st, m2) - pb_membersize(st, m2))
+#define pb_delta_end(st, m1, m2) (offsetof(st, m1) == offsetof(st, m2) \
+                                  ? offsetof(st, m1) \
+                                  : offsetof(st, m1) - offsetof(st, m2) - pb_membersize(st, m2))
 #define PB_LAST_FIELD {0,(pb_type_t) 0,0,0,0,0,0}
 
+/* Required fields are the simplest. They just have delta (padding) from
+ * previous field end, and the size of the field. Pointer is used for
+ * submessages and default values.
+ */
+#define PB_REQUIRED_STATIC(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_STATIC | PB_HTYPE_REQUIRED | ltype, \
+    pb_delta_end(st, m, pm), 0, pb_membersize(st, m), 0, ptr}
+
+/* Optional fields add the delta to the has_ variable. */
+#define PB_OPTIONAL_STATIC(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_STATIC | PB_HTYPE_OPTIONAL | ltype, \
+    pb_delta_end(st, m, pm), \
+    pb_delta(st, has_ ## m, m), \
+    pb_membersize(st, m), 0, ptr}
+
+/* Repeated fields have a _count field and also the maximum number of entries. */
+#define PB_REPEATED_STATIC(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_STATIC | PB_HTYPE_REPEATED | ltype, \
+    pb_delta_end(st, m, pm), \
+    pb_delta(st, m ## _count, m), \
+    pb_membersize(st, m[0]), \
+    pb_arraysize(st, m), ptr}
+
+/* Callbacks are much like required fields except with special datatype. */
+#define PB_REQUIRED_CALLBACK(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_CALLBACK | PB_HTYPE_REQUIRED | ltype, \
+    pb_delta_end(st, m, pm), 0, pb_membersize(st, m), 0, ptr}
+
+#define PB_OPTIONAL_CALLBACK(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_CALLBACK | PB_HTYPE_OPTIONAL | ltype, \
+    pb_delta_end(st, m, pm), 0, pb_membersize(st, m), 0, ptr}
+    
+#define PB_REPEATED_CALLBACK(tag, st, m, pm, ltype, ptr) \
+    {tag, PB_ATYPE_CALLBACK | PB_HTYPE_REPEATED | ltype, \
+    pb_delta_end(st, m, pm), 0, pb_membersize(st, m), 0, ptr}
+
+/* The mapping from protobuf types to LTYPEs is done using these macros. */
+#define PB_LTYPE_MAP_BOOL       PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_BYTES      PB_LTYPE_BYTES
+#define PB_LTYPE_MAP_DOUBLE     PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_ENUM       PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_FIXED32    PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_FIXED64    PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_FLOAT      PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_INT32      PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_INT64      PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_MESSAGE    PB_LTYPE_SUBMESSAGE
+#define PB_LTYPE_MAP_SFIXED32   PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_SFIXED64   PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_SINT32     PB_LTYPE_SVARINT
+#define PB_LTYPE_MAP_SINT64     PB_LTYPE_SVARINT
+#define PB_LTYPE_MAP_STRING     PB_LTYPE_STRING
+#define PB_LTYPE_MAP_UINT32     PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_UINT64     PB_LTYPE_VARINT
+
+/* This is the actual macro used in field descriptions.
+ * It takes these arguments:
+ * - Field tag number
+ * - Field type:   BOOL, BYTES, DOUBLE, ENUM, FIXED32, FIXED64,
+ *                 FLOAT, INT32, INT64, MESSAGE, SFIXED32, SFIXED64
+ *                 SINT32, SINT64, STRING, UINT32 or UINT64
+ * - Field rules:  REQUIRED, OPTIONAL or REPEATED
+ * - Allocation:   STATIC or CALLBACK
+ * - Message name
+ * - Field name
+ * - Previous field name (or field name again for first field)
+ * - Pointer to default value or submsg fields.
+ */
+
+#define PB_FIELD(tag, type, rules, allocation, message, field, prevfield, ptr) \
+    PB_ ## rules ## _ ## allocation(tag, message, field, prevfield, \
+                                    PB_LTYPE_MAP_ ## type, ptr)
+
 /* These macros are used for giving out error messages.
  * They are mostly a debugging aid; the main error information
  * is the true/false return value from functions.