--- /dev/null
+/* pb_encode.c -- encode a protobuf using minimal resources
+ *
+ * 2011 Petteri Aimonen <jpa@kapsi.fi>
+ */
+
+#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
+ * ignore the annotation.
+ */
+#if !defined(__GNUC__) || ( __GNUC__ < 3) || (__GNUC__ == 3 && __GNUC_MINOR__ < 4)
+ #define checkreturn
+#else
+ #define checkreturn __attribute__((warn_unused_result))
+#endif
+
+/**************************************
+ * Declarations internal to this file *
+ **************************************/
+typedef bool (*pb_encoder_t)(pb_ostream_t *stream, const pb_field_t *field, const void *src) checkreturn;
+
+static bool checkreturn buf_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count);
+static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *field, const void *pData, size_t count, pb_encoder_t func);
+static bool checkreturn encode_field(pb_ostream_t *stream, const pb_field_t *field, const void *pData);
+static bool checkreturn default_extension_encoder(pb_ostream_t *stream, const pb_extension_t *extension);
+static bool checkreturn encode_extension_field(pb_ostream_t *stream, const pb_field_t *field, const void *pData);
+static void *pb_const_cast(const void *p);
+static bool checkreturn pb_enc_varint(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);
+static bool checkreturn pb_enc_svarint(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);
+static bool checkreturn pb_enc_fixed64(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);
+static bool checkreturn pb_enc_string(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);
+static bool checkreturn pb_enc_fixed_length_bytes(pb_ostream_t *stream, const pb_field_t *field, const void *src);
+
+/* --- Function pointers to field encoders ---
+ * Order in the array must match pb_action_t LTYPE numbering.
+ */
+static const pb_encoder_t PB_ENCODERS[PB_LTYPES_COUNT] = {
+ &pb_enc_varint,
+ &pb_enc_uvarint,
+ &pb_enc_svarint,
+ &pb_enc_fixed32,
+ &pb_enc_fixed64,
+
+ &pb_enc_bytes,
+ &pb_enc_string,
+ &pb_enc_submessage,
+ NULL, /* extensions */
+ &pb_enc_fixed_length_bytes
+};
+
+/*******************************
+ * pb_ostream_t implementation *
+ *******************************/
+
+static bool checkreturn buf_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count)
+{
+ size_t i;
+ pb_byte_t *dest = (pb_byte_t*)stream->state;
+ stream->state = dest + count;
+
+ for (i = 0; i < count; i++)
+ dest[i] = buf[i];
+
+ return true;
+}
+
+pb_ostream_t pb_ostream_from_buffer(pb_byte_t *buf, size_t bufsize)
+{
+ pb_ostream_t stream;
+#ifdef PB_BUFFER_ONLY
+ stream.callback = (void*)1; /* Just a marker value */
+#else
+ stream.callback = &buf_write;
+#endif
+ stream.state = buf;
+ stream.max_size = bufsize;
+ stream.bytes_written = 0;
+#ifndef PB_NO_ERRMSG
+ stream.errmsg = NULL;
+#endif
+ return stream;
+}
+
+bool checkreturn pb_write(pb_ostream_t *stream, const pb_byte_t *buf, size_t count)
+{
+ if (stream->callback != NULL)
+ {
+ if (stream->bytes_written + count > stream->max_size)
+ PB_RETURN_ERROR(stream, "stream full");
+
+#ifdef PB_BUFFER_ONLY
+ if (!buf_write(stream, buf, count))
+ PB_RETURN_ERROR(stream, "io error");
+#else
+ if (!stream->callback(stream, buf, count))
+ PB_RETURN_ERROR(stream, "io error");
+#endif
+ }
+
+ stream->bytes_written += count;
+ return true;
+}
+
+/*************************
+ * Encode a single field *
+ *************************/
+
+/* Encode a static array. Handles the size calculations and possible packing. */
+static bool checkreturn encode_array(pb_ostream_t *stream, const pb_field_t *field,
+ const void *pData, size_t count, pb_encoder_t func)
+{
+ size_t i;
+ const void *p;
+ size_t size;
+
+ if (count == 0)
+ return true;
+
+ if (PB_ATYPE(field->type) != PB_ATYPE_POINTER && count > field->array_size)
+ PB_RETURN_ERROR(stream, "array max size exceeded");
+
+ /* We always pack arrays if the datatype allows it. */
+ if (PB_LTYPE(field->type) <= PB_LTYPE_LAST_PACKABLE)
+ {
+ if (!pb_encode_tag(stream, PB_WT_STRING, field->tag))
+ return false;
+
+ /* Determine the total size of packed array. */
+ if (PB_LTYPE(field->type) == PB_LTYPE_FIXED32)
+ {
+ size = 4 * count;
+ }
+ else if (PB_LTYPE(field->type) == PB_LTYPE_FIXED64)
+ {
+ size = 8 * count;
+ }
+ else
+ {
+ pb_ostream_t sizestream = PB_OSTREAM_SIZING;
+ p = pData;
+ for (i = 0; i < count; i++)
+ {
+ if (!func(&sizestream, field, p))
+ return false;
+ p = (const char*)p + field->data_size;
+ }
+ size = sizestream.bytes_written;
+ }
+
+ if (!pb_encode_varint(stream, (uint64_t)size))
+ return false;
+
+ if (stream->callback == NULL)
+ return pb_write(stream, NULL, size); /* Just sizing.. */
+
+ /* Write the data */
+ p = pData;
+ for (i = 0; i < count; i++)
+ {
+ if (!func(stream, field, p))
+ return false;
+ p = (const char*)p + field->data_size;
+ }
+ }
+ else
+ {
+ p = pData;
+ for (i = 0; i < count; i++)
+ {
+ if (!pb_encode_tag_for_field(stream, field))
+ return false;
+
+ /* 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_BYTES))
+ {
+ if (!func(stream, field, *(const void* const*)p))
+ return false;
+ }
+ else
+ {
+ if (!func(stream, field, p))
+ return false;
+ }
+ p = (const char*)p + field->data_size;
+ }
+ }
+
+ return true;
+}
+
+/* In proto3, all fields are optional and are only encoded if their value is "non-zero".
+ * This function implements the check for the zero value. */
+static bool pb_check_proto3_default_value(const pb_field_t *field, const void *pData)
+{
+ if (PB_ATYPE(field->type) == PB_ATYPE_STATIC)
+ {
+ if (PB_LTYPE(field->type) == PB_LTYPE_BYTES)
+ {
+ const pb_bytes_array_t *bytes = (const pb_bytes_array_t*)pData;
+ return bytes->size == 0;
+ }
+ else if (PB_LTYPE(field->type) == PB_LTYPE_STRING)
+ {
+ return *(const char*)pData == '\0';
+ }
+ else if (PB_LTYPE(field->type) == PB_LTYPE_FIXED_LENGTH_BYTES)
+ {
+ /* Fixed length bytes is only empty if its length is fixed
+ * as 0. Which would be pretty strange, but we can check
+ * it anyway. */
+ return field->data_size == 0;
+ }
+ else if (PB_LTYPE(field->type) == PB_LTYPE_SUBMESSAGE)
+ {
+ /* Check all fields in the submessage to find if any of them
+ * are non-zero. The comparison cannot be done byte-per-byte
+ * because the C struct may contain padding bytes that must
+ * be skipped.
+ */
+ pb_field_iter_t iter;
+ if (pb_field_iter_begin(&iter, (const pb_field_t*)field->ptr, pb_const_cast(pData)))
+ {
+ do
+ {
+ if (!pb_check_proto3_default_value(iter.pos, iter.pData))
+ {
+ return false;
+ }
+ } while (pb_field_iter_next(&iter));
+ }
+ return true;
+ }
+ }
+
+ {
+ /* Catch-all branch that does byte-per-byte comparison for zero value.
+ *
+ * This is for all pointer fields, and for static PB_LTYPE_VARINT,
+ * UVARINT, SVARINT, FIXED32, FIXED64, EXTENSION fields, and also
+ * callback fields. These all have integer or pointer value which
+ * can be compared with 0.
+ */
+ pb_size_t i;
+ const char *p = (const char*)pData;
+ for (i = 0; i < field->data_size; i++)
+ {
+ if (p[i] != 0)
+ {
+ return false;
+ }
+ }
+
+ return true;
+ }
+}
+
+/* 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;
+ bool implicit_has;
+ const void *pSize = &implicit_has;
+
+ func = PB_ENCODERS[PB_LTYPE(field->type)];
+
+ if (field->size_offset)
+ {
+ /* Static optional, repeated or oneof field */
+ pSize = (const char*)pData + field->size_offset;
+ }
+ else if (PB_HTYPE(field->type) == PB_HTYPE_OPTIONAL)
+ {
+ /* Proto3 style field, optional but without explicit has_ field. */
+ implicit_has = !pb_check_proto3_default_value(field, pData);
+ }
+ else
+ {
+ /* Required field, always present */
+ implicit_has = true;
+ }
+
+ if (PB_ATYPE(field->type) == PB_ATYPE_POINTER)
+ {
+ /* 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)
+ PB_RETURN_ERROR(stream, "missing required field");
+ if (!pb_encode_tag_for_field(stream, field))
+ return false;
+ if (!func(stream, field, pData))
+ return false;
+ break;
+
+ case PB_HTYPE_OPTIONAL:
+ if (*(const bool*)pSize)
+ {
+ if (!pb_encode_tag_for_field(stream, field))
+ return false;
+
+ if (!func(stream, field, pData))
+ return false;
+ }
+ break;
+
+ case PB_HTYPE_REPEATED:
+ if (!encode_array(stream, field, pData, *(const pb_size_t*)pSize, func))
+ return false;
+ break;
+
+ case PB_HTYPE_ONEOF:
+ if (*(const pb_size_t*)pSize == field->tag)
+ {
+ if (!pb_encode_tag_for_field(stream, field))
+ return false;
+
+ if (!func(stream, field, pData))
+ return false;
+ }
+ break;
+
+ default:
+ PB_RETURN_ERROR(stream, "invalid field type");
+ }
+
+ return true;
+}
+
+/* Encode a field with callback semantics. This means that a user function is
+ * called to provide and encode the actual data. */
+static bool checkreturn encode_callback_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ const pb_callback_t *callback = (const pb_callback_t*)pData;
+
+#ifdef PB_OLD_CALLBACK_STYLE
+ const void *arg = callback->arg;
+#else
+ void * const *arg = &(callback->arg);
+#endif
+
+ if (callback->funcs.encode != NULL)
+ {
+ if (!callback->funcs.encode(stream, field, arg))
+ PB_RETURN_ERROR(stream, "callback error");
+ }
+ return true;
+}
+
+/* Encode a single field of any callback or static type. */
+static bool checkreturn encode_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ switch (PB_ATYPE(field->type))
+ {
+ case PB_ATYPE_STATIC:
+ case PB_ATYPE_POINTER:
+ return encode_basic_field(stream, field, pData);
+
+ case PB_ATYPE_CALLBACK:
+ return encode_callback_field(stream, field, pData);
+
+ default:
+ PB_RETURN_ERROR(stream, "invalid field type");
+ }
+}
+
+/* Default handler for extension fields. Expects to have a pb_field_t
+ * pointer in the extension->type->arg field. */
+static bool checkreturn default_extension_encoder(pb_ostream_t *stream,
+ const pb_extension_t *extension)
+{
+ const pb_field_t *field = (const pb_field_t*)extension->type->arg;
+
+ 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
+ * to encode themselves. */
+static bool checkreturn encode_extension_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ const pb_extension_t *extension = *(const pb_extension_t* const *)pData;
+ PB_UNUSED(field);
+
+ while (extension)
+ {
+ bool status;
+ if (extension->type->encode)
+ status = extension->type->encode(stream, extension);
+ else
+ status = default_extension_encoder(stream, extension);
+
+ if (!status)
+ return false;
+
+ extension = extension->next;
+ }
+
+ return true;
+}
+
+/*********************
+ * Encode all fields *
+ *********************/
+
+static void *pb_const_cast(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)
+{
+ pb_field_iter_t iter;
+ if (!pb_field_iter_begin(&iter, fields, pb_const_cast(src_struct)))
+ return true; /* Empty message type */
+
+ do {
+ if (PB_LTYPE(iter.pos->type) == PB_LTYPE_EXTENSION)
+ {
+ /* Special case for the extension field placeholder */
+ if (!encode_extension_field(stream, iter.pos, iter.pData))
+ return false;
+ }
+ else
+ {
+ /* Regular field */
+ if (!encode_field(stream, iter.pos, iter.pData))
+ return false;
+ }
+ } while (pb_field_iter_next(&iter));
+
+ return true;
+}
+
+bool pb_encode_delimited(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct)
+{
+ 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 *
+ ********************/
+bool checkreturn pb_encode_varint(pb_ostream_t *stream, uint64_t value)
+{
+ pb_byte_t buffer[10];
+ size_t i = 0;
+
+ if (value <= 0x7F)
+ {
+ pb_byte_t v = (pb_byte_t)value;
+ return pb_write(stream, &v, 1);
+ }
+
+ while (value)
+ {
+ buffer[i] = (pb_byte_t)((value & 0x7F) | 0x80);
+ value >>= 7;
+ i++;
+ }
+ buffer[i-1] &= 0x7F; /* Unset top bit on last byte */
+
+ return pb_write(stream, buffer, i);
+}
+
+bool checkreturn pb_encode_svarint(pb_ostream_t *stream, int64_t value)
+{
+ uint64_t zigzagged;
+ if (value < 0)
+ zigzagged = ~((uint64_t)value << 1);
+ else
+ zigzagged = (uint64_t)value << 1;
+
+ return pb_encode_varint(stream, zigzagged);
+}
+
+bool checkreturn pb_encode_fixed32(pb_ostream_t *stream, const void *value)
+{
+ uint32_t val = *(const uint32_t*)value;
+ pb_byte_t bytes[4];
+ bytes[0] = (pb_byte_t)(val & 0xFF);
+ bytes[1] = (pb_byte_t)((val >> 8) & 0xFF);
+ bytes[2] = (pb_byte_t)((val >> 16) & 0xFF);
+ bytes[3] = (pb_byte_t)((val >> 24) & 0xFF);
+ return pb_write(stream, bytes, 4);
+}
+
+bool checkreturn pb_encode_fixed64(pb_ostream_t *stream, const void *value)
+{
+ uint64_t val = *(const uint64_t*)value;
+ pb_byte_t bytes[8];
+ bytes[0] = (pb_byte_t)(val & 0xFF);
+ bytes[1] = (pb_byte_t)((val >> 8) & 0xFF);
+ bytes[2] = (pb_byte_t)((val >> 16) & 0xFF);
+ bytes[3] = (pb_byte_t)((val >> 24) & 0xFF);
+ bytes[4] = (pb_byte_t)((val >> 32) & 0xFF);
+ bytes[5] = (pb_byte_t)((val >> 40) & 0xFF);
+ bytes[6] = (pb_byte_t)((val >> 48) & 0xFF);
+ bytes[7] = (pb_byte_t)((val >> 56) & 0xFF);
+ return pb_write(stream, bytes, 8);
+}
+
+bool checkreturn pb_encode_tag(pb_ostream_t *stream, pb_wire_type_t wiretype, uint32_t field_number)
+{
+ uint64_t tag = ((uint64_t)field_number << 3) | wiretype;
+ return pb_encode_varint(stream, tag);
+}
+
+bool checkreturn pb_encode_tag_for_field(pb_ostream_t *stream, const pb_field_t *field)
+{
+ pb_wire_type_t wiretype;
+ switch (PB_LTYPE(field->type))
+ {
+ case PB_LTYPE_VARINT:
+ case PB_LTYPE_UVARINT:
+ case PB_LTYPE_SVARINT:
+ wiretype = PB_WT_VARINT;
+ break;
+
+ case PB_LTYPE_FIXED32:
+ wiretype = PB_WT_32BIT;
+ break;
+
+ case PB_LTYPE_FIXED64:
+ wiretype = PB_WT_64BIT;
+ break;
+
+ case PB_LTYPE_BYTES:
+ case PB_LTYPE_STRING:
+ case PB_LTYPE_SUBMESSAGE:
+ case PB_LTYPE_FIXED_LENGTH_BYTES:
+ wiretype = PB_WT_STRING;
+ break;
+
+ default:
+ PB_RETURN_ERROR(stream, "invalid field type");
+ }
+
+ return pb_encode_tag(stream, wiretype, field->tag);
+}
+
+bool checkreturn pb_encode_string(pb_ostream_t *stream, const pb_byte_t *buffer, size_t size)
+{
+ if (!pb_encode_varint(stream, (uint64_t)size))
+ return false;
+
+ return pb_write(stream, buffer, size);
+}
+
+bool checkreturn pb_encode_submessage(pb_ostream_t *stream, const pb_field_t fields[], const void *src_struct)
+{
+ /* First calculate the message size using a non-writing substream. */
+ pb_ostream_t substream = PB_OSTREAM_SIZING;
+ size_t size;
+ bool status;
+
+ if (!pb_encode(&substream, fields, src_struct))
+ {
+#ifndef PB_NO_ERRMSG
+ stream->errmsg = substream.errmsg;
+#endif
+ return false;
+ }
+
+ size = substream.bytes_written;
+
+ if (!pb_encode_varint(stream, (uint64_t)size))
+ return false;
+
+ if (stream->callback == NULL)
+ return pb_write(stream, NULL, size); /* Just sizing */
+
+ if (stream->bytes_written + size > stream->max_size)
+ PB_RETURN_ERROR(stream, "stream full");
+
+ /* Use a substream to verify that a callback doesn't write more than
+ * what it did the first time. */
+ substream.callback = stream->callback;
+ substream.state = stream->state;
+ substream.max_size = size;
+ substream.bytes_written = 0;
+#ifndef PB_NO_ERRMSG
+ substream.errmsg = NULL;
+#endif
+
+ status = pb_encode(&substream, fields, src_struct);
+
+ stream->bytes_written += substream.bytes_written;
+ stream->state = substream.state;
+#ifndef PB_NO_ERRMSG
+ stream->errmsg = substream.errmsg;
+#endif
+
+ if (substream.bytes_written != size)
+ PB_RETURN_ERROR(stream, "submsg size changed");
+
+ return status;
+}
+
+/* Field encoders */
+
+static bool checkreturn pb_enc_varint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+{
+ int64_t value = 0;
+
+ if (field->data_size == sizeof(int_least8_t))
+ value = *(const int_least8_t*)src;
+ else if (field->data_size == sizeof(int_least16_t))
+ value = *(const int_least16_t*)src;
+ else if (field->data_size == sizeof(int32_t))
+ value = *(const int32_t*)src;
+ else if (field->data_size == sizeof(int64_t))
+ value = *(const int64_t*)src;
+ else
+ PB_RETURN_ERROR(stream, "invalid data_size");
+
+ return pb_encode_varint(stream, (uint64_t)value);
+}
+
+static bool checkreturn pb_enc_uvarint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+{
+ uint64_t value = 0;
+
+ if (field->data_size == sizeof(uint_least8_t))
+ value = *(const uint_least8_t*)src;
+ else if (field->data_size == sizeof(uint_least16_t))
+ value = *(const uint_least16_t*)src;
+ else if (field->data_size == sizeof(uint32_t))
+ value = *(const uint32_t*)src;
+ else if (field->data_size == sizeof(uint64_t))
+ value = *(const uint64_t*)src;
+ else
+ PB_RETURN_ERROR(stream, "invalid data_size");
+
+ return pb_encode_varint(stream, value);
+}
+
+static bool checkreturn pb_enc_svarint(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+{
+ int64_t value = 0;
+
+ if (field->data_size == sizeof(int_least8_t))
+ value = *(const int_least8_t*)src;
+ else if (field->data_size == sizeof(int_least16_t))
+ value = *(const int_least16_t*)src;
+ else if (field->data_size == sizeof(int32_t))
+ value = *(const int32_t*)src;
+ else if (field->data_size == sizeof(int64_t))
+ value = *(const int64_t*)src;
+ else
+ PB_RETURN_ERROR(stream, "invalid data_size");
+
+ return pb_encode_svarint(stream, value);
+}
+
+static bool checkreturn pb_enc_fixed64(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+{
+ PB_UNUSED(field);
+ return pb_encode_fixed64(stream, src);
+}
+
+static bool checkreturn pb_enc_fixed32(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+{
+ PB_UNUSED(field);
+ return pb_encode_fixed32(stream, 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 = NULL;
+
+ bytes = (const pb_bytes_array_t*)src;
+
+ if (src == NULL)
+ {
+ /* Treat null pointer as an empty bytes field */
+ return pb_encode_string(stream, NULL, 0);
+ }
+
+ if (PB_ATYPE(field->type) == PB_ATYPE_STATIC &&
+ PB_BYTES_ARRAY_T_ALLOCSIZE(bytes->size) > field->data_size)
+ {
+ PB_RETURN_ERROR(stream, "bytes size exceeded");
+ }
+
+ return pb_encode_string(stream, bytes->bytes, bytes->size);
+}
+
+static bool checkreturn pb_enc_string(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+{
+ 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)
+ {
+ size = 0; /* Treat null pointer as an empty string */
+ }
+ else
+ {
+ /* strnlen() is not always available, so just use a loop */
+ while (size < max_size && *p != '\0')
+ {
+ size++;
+ p++;
+ }
+ }
+
+ return pb_encode_string(stream, (const pb_byte_t*)src, size);
+}
+
+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");
+
+ return pb_encode_submessage(stream, (const pb_field_t*)field->ptr, src);
+}
+
+static bool checkreturn pb_enc_fixed_length_bytes(pb_ostream_t *stream, const pb_field_t *field, const void *src)
+{
+ return pb_encode_string(stream, (const pb_byte_t*)src, field->data_size);
+}
+
fnp / wl-app.git / blobdiff