* 2011 Petteri Aimonen <jpa@kapsi.fi>
*/
-#define NANOPB_INTERNALS
#include "pb.h"
#include "pb_encode.h"
+#include "pb_common.h"
/* Use the GCC warn_unused_result attribute to check that all return values
* are propagated correctly. On other compilers and gcc before 3.4.0 just
if (!pb_encode_tag_for_field(stream, field))
return false;
- /* Special case for strings */
+ /* Normally the data is stored directly in the array entries, but
+ * for pointer-type string and bytes fields, the array entries are
+ * actually pointers themselves also. So we have to dereference once
+ * more to get to the actual data. */
if (PB_ATYPE(field->type) == PB_ATYPE_POINTER &&
- PB_LTYPE(field->type) == PB_LTYPE_STRING)
+ (PB_LTYPE(field->type) == PB_LTYPE_STRING ||
+ PB_LTYPE(field->type) == PB_LTYPE_BYTES))
{
- if (!func(stream, field, *(const void**)p))
+ if (!func(stream, field, *(const void* const*)p))
return false;
}
else
return true;
}
-/* Encode a field with static allocation, i.e. one whose data is stored
- * in the structure itself. */
-static bool checkreturn encode_static_field(pb_ostream_t *stream,
+/* Encode a field with static or pointer allocation, i.e. one whose data
+ * is available to the encoder directly. */
+static bool checkreturn encode_basic_field(pb_ostream_t *stream,
const pb_field_t *field, const void *pData)
{
pb_encoder_t func;
const void *pSize;
- bool dummy = true;
+ bool implicit_has = true;
func = PB_ENCODERS[PB_LTYPE(field->type)];
if (field->size_offset)
pSize = (const char*)pData + field->size_offset;
- else if (PB_ATYPE(field->type) == PB_ATYPE_POINTER)
- pSize = *(const void**)pData ? &dummy : pData;
else
- pSize = &dummy;
+ pSize = &implicit_has;
if (PB_ATYPE(field->type) == PB_ATYPE_POINTER)
- pData = *(const void**)pData;
+ {
+ /* pData is a pointer to the field, which contains pointer to
+ * the data. If the 2nd pointer is NULL, it is interpreted as if
+ * the has_field was false.
+ */
+
+ pData = *(const void* const*)pData;
+ implicit_has = (pData != NULL);
+ }
switch (PB_HTYPE(field->type))
{
case PB_HTYPE_REQUIRED:
if (!pData)
- return false;
+ PB_RETURN_ERROR(stream, "missing required field");
if (!pb_encode_tag_for_field(stream, field))
return false;
if (!func(stream, field, pData))
break;
case PB_HTYPE_REPEATED:
- if (!encode_array(stream, field, pData, *(const size_t*)pSize, func))
+ if (!encode_array(stream, field, pData, *(const pb_size_t*)pSize, func))
return false;
break;
{
case PB_ATYPE_STATIC:
case PB_ATYPE_POINTER:
- return encode_static_field(stream, field, pData);
+ return encode_basic_field(stream, field, pData);
case PB_ATYPE_CALLBACK:
return encode_callback_field(stream, field, pData);
const pb_extension_t *extension)
{
const pb_field_t *field = (const pb_field_t*)extension->type->arg;
- return encode_field(stream, field, extension->dest);
+
+ if (PB_ATYPE(field->type) == PB_ATYPE_POINTER)
+ {
+ /* For pointer extensions, the pointer is stored directly
+ * in the extension structure. This avoids having an extra
+ * indirection. */
+ return encode_field(stream, field, &extension->dest);
+ }
+ else
+ {
+ return encode_field(stream, field, extension->dest);
+ }
}
/* Walk through all the registered extensions and give them a chance
const pb_field_t *field, const void *pData)
{
const pb_extension_t *extension = *(const pb_extension_t* const *)pData;
- UNUSED(field);
+ PB_UNUSED(field);
while (extension)
{
* Encode all fields *
*********************/
+static void *remove_const(const void *p)
+{
+ /* Note: this casts away const, in order to use the common field iterator
+ * logic for both encoding and decoding. */
+ union {
+ void *p1;
+ const void *p2;
+ } t;
+ t.p2 = p;
+ return t.p1;
+}
+
bool checkreturn pb_encode(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct)
{
- const pb_field_t *field = fields;
- const void *pData = src_struct;
- size_t prev_size = 0;
+ pb_field_iter_t iter;
+ if (!pb_field_iter_begin(&iter, fields, remove_const(src_struct)))
+ return true; /* Empty message type */
- while (field->tag != 0)
- {
- pData = (const char*)pData + prev_size + field->data_offset;
- if (PB_ATYPE(field->type) == PB_ATYPE_POINTER)
- prev_size = sizeof(const void*);
- else
- prev_size = field->data_size;
-
- /* Special case for static arrays */
- if (PB_ATYPE(field->type) == PB_ATYPE_STATIC &&
- PB_HTYPE(field->type) == PB_HTYPE_REPEATED)
- {
- prev_size *= field->array_size;
- }
-
- if (PB_LTYPE(field->type) == PB_LTYPE_EXTENSION)
+ do {
+ if (PB_LTYPE(iter.pos->type) == PB_LTYPE_EXTENSION)
{
/* Special case for the extension field placeholder */
- if (!encode_extension_field(stream, field, pData))
+ if (!encode_extension_field(stream, iter.pos, iter.pData))
return false;
}
else
{
/* Regular field */
- if (!encode_field(stream, field, pData))
+ if (!encode_field(stream, iter.pos, iter.pData))
return false;
}
-
- field++;
- }
+ } while (pb_field_iter_next(&iter));
return true;
}
return pb_encode_submessage(stream, fields, src_struct);
}
+bool pb_get_encoded_size(size_t *size, const pb_field_t fields[], const void *src_struct)
+{
+ pb_ostream_t stream = PB_OSTREAM_SIZING;
+
+ if (!pb_encode(&stream, fields, src_struct))
+ return false;
+
+ *size = stream.bytes_written;
+ return true;
+}
+
/********************
* Helper functions *
********************/
{
uint64_t zigzagged;
if (value < 0)
- zigzagged = (uint64_t)(~(value << 1));
+ zigzagged = ~((uint64_t)value << 1);
else
- zigzagged = (uint64_t)(value << 1);
+ zigzagged = (uint64_t)value << 1;
return pb_encode_varint(stream, zigzagged);
}
bool checkreturn pb_encode_tag(pb_ostream_t *stream, pb_wire_type_t wiretype, uint32_t field_number)
{
- uint64_t tag = wiretype | (field_number << 3);
+ uint64_t tag = ((uint64_t)field_number << 3) | wiretype;
return pb_encode_varint(stream, tag);
}
bool status;
if (!pb_encode(&substream, fields, src_struct))
+ {
+#ifndef PB_NO_ERRMSG
+ stream->errmsg = substream.errmsg;
+#endif
return false;
+ }
size = substream.bytes_written;
/* Field encoders */
-bool checkreturn pb_enc_varint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+static bool checkreturn pb_enc_varint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
int64_t value = 0;
/* Cases 1 and 2 are for compilers that have smaller types for bool
- * or enums. */
+ * or enums, and for int_size option. */
switch (field->data_size)
{
case 1: value = *(const int8_t*)src; break;
return pb_encode_varint(stream, (uint64_t)value);
}
-bool checkreturn pb_enc_uvarint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+static bool checkreturn pb_enc_uvarint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
uint64_t value = 0;
switch (field->data_size)
{
+ case 1: value = *(const uint8_t*)src; break;
+ case 2: value = *(const uint16_t*)src; break;
case 4: value = *(const uint32_t*)src; break;
case 8: value = *(const uint64_t*)src; break;
default: PB_RETURN_ERROR(stream, "invalid data_size");
return pb_encode_varint(stream, value);
}
-bool checkreturn pb_enc_svarint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+static bool checkreturn pb_enc_svarint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
int64_t value = 0;
switch (field->data_size)
{
+ case 1: value = *(const int8_t*)src; break;
+ case 2: value = *(const int16_t*)src; break;
case 4: value = *(const int32_t*)src; break;
case 8: value = *(const int64_t*)src; break;
default: PB_RETURN_ERROR(stream, "invalid data_size");
return pb_encode_svarint(stream, value);
}
-bool checkreturn pb_enc_fixed64(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+static bool checkreturn pb_enc_fixed64(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
- UNUSED(field);
+ PB_UNUSED(field);
return pb_encode_fixed64(stream, src);
}
-bool checkreturn pb_enc_fixed32(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+static bool checkreturn pb_enc_fixed32(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
- UNUSED(field);
+ PB_UNUSED(field);
return pb_encode_fixed32(stream, src);
}
-bool checkreturn pb_enc_bytes(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+static bool checkreturn pb_enc_bytes(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
const pb_bytes_array_t *bytes = (const pb_bytes_array_t*)src;
-
- if (PB_ATYPE(field->type) == PB_ATYPE_POINTER)
+
+ if (src == NULL)
{
- return pb_encode_string(stream, *(const uint8_t**)bytes->bytes, bytes->size);
+ /* Threat null pointer as an empty bytes field */
+ return pb_encode_string(stream, NULL, 0);
}
- else
+
+ if (PB_ATYPE(field->type) == PB_ATYPE_STATIC &&
+ PB_BYTES_ARRAY_T_ALLOCSIZE(bytes->size) > field->data_size)
{
- if (bytes->size + offsetof(pb_bytes_array_t, bytes) > field->data_size)
- PB_RETURN_ERROR(stream, "bytes size exceeded");
-
- return pb_encode_string(stream, bytes->bytes, bytes->size);
+ PB_RETURN_ERROR(stream, "bytes size exceeded");
}
+
+ return pb_encode_string(stream, bytes->bytes, bytes->size);
}
-bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+static bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
- /* strnlen() is not always available, so just use a for-loop */
size_t size = 0;
+ size_t max_size = field->data_size;
const char *p = (const char*)src;
+
if (PB_ATYPE(field->type) == PB_ATYPE_POINTER)
+ max_size = (size_t)-1;
+
+ if (src == NULL)
{
- while (*p != '\0')
- {
- size++;
- p++;
- }
+ size = 0; /* Threat null pointer as an empty string */
}
else
{
- while (size < field->data_size && *p != '\0')
+ /* strnlen() is not always available, so just use a loop */
+ while (size < max_size && *p != '\0')
{
size++;
p++;
}
}
+
return pb_encode_string(stream, (const uint8_t*)src, size);
}
-bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+static bool checkreturn pb_enc_submessage(pb_ostream_t *stream, const pb_field_t *field, const void *src)
{
if (field->ptr == NULL)
PB_RETURN_ERROR(stream, "invalid field descriptor");
Code Review / apps / agl-service-can-low-level.git / blobdiff