summaryrefslogtreecommitdiffstats
path: root/lib/protobuf-c/protobuf-c.c
diff options
context:
space:
mode:
authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 13:14:46 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-15 13:14:46 +0000
commit025c439e829e0db9ac511cd9c1b8d5fd53475ead (patch)
treefa6986b4690f991613ffb97cea1f6942427baf5d /lib/protobuf-c/protobuf-c.c
parentInitial commit. (diff)
downloadsudo-025c439e829e0db9ac511cd9c1b8d5fd53475ead.tar.xz
sudo-025c439e829e0db9ac511cd9c1b8d5fd53475ead.zip
Adding upstream version 1.9.15p5.upstream/1.9.15p5upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r--lib/protobuf-c/protobuf-c.c3687
1 files changed, 3687 insertions, 0 deletions
diff --git a/lib/protobuf-c/protobuf-c.c b/lib/protobuf-c/protobuf-c.c
new file mode 100644
index 0000000..9d7da26
--- /dev/null
+++ b/lib/protobuf-c/protobuf-c.c
@@ -0,0 +1,3687 @@
+/*
+ * Copyright (c) 2008-2022, Dave Benson and the protobuf-c authors.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/*! \file
+ * Support library for `protoc-c` generated code.
+ *
+ * This file implements the public API used by the code generated
+ * by `protoc-c`.
+ *
+ * \authors Dave Benson and the protobuf-c authors
+ *
+ * \copyright 2008-2014. Licensed under the terms of the [BSD-2-Clause] license.
+ */
+
+/**
+ * \todo 64-BIT OPTIMIZATION: certain implementations use 32-bit math
+ * even on 64-bit platforms (uint64_size, uint64_pack, parse_uint64).
+ *
+ * \todo Use size_t consistently.
+ */
+
+#include <config.h>
+
+#include <stdlib.h> /* for malloc, free */
+#include <string.h> /* for strcmp, strlen, memcpy, memmove, memset */
+#if defined(HAVE_ENDIAN_H)
+# include <endian.h>
+#elif defined(HAVE_SYS_ENDIAN_H)
+# include <sys/endian.h>
+#elif defined(HAVE_MACHINE_ENDIAN_H)
+# include <machine/endian.h>
+#else
+# include <compat/endian.h>
+#endif
+
+#include <protobuf-c/protobuf-c.h>
+
+#if BYTE_ORDER == BIG_ENDIAN
+# define WORDS_BIGENDIAN
+#endif
+
+#define TRUE 1
+#define FALSE 0
+
+#define PROTOBUF_C__ASSERT_NOT_REACHED() assert(0)
+
+/* Workaround for Microsoft compilers. */
+#ifdef _MSC_VER
+# define inline __inline
+#endif
+
+/**
+ * \defgroup internal Internal functions and macros
+ *
+ * These are not exported by the library but are useful to developers working
+ * on `libprotobuf-c` itself.
+ */
+
+/**
+ * \defgroup macros Utility macros for manipulating structures
+ *
+ * Macros and constants used to manipulate the base "classes" generated by
+ * `protobuf-c`. They also define limits and check correctness.
+ *
+ * \ingroup internal
+ * @{
+ */
+
+/** The maximum length of a 64-bit integer in varint encoding. */
+#define MAX_UINT64_ENCODED_SIZE 10
+
+#ifndef PROTOBUF_C_UNPACK_ERROR
+# define PROTOBUF_C_UNPACK_ERROR(...)
+#endif
+
+#if !defined(_WIN32) || !defined(PROTOBUF_C_USE_SHARED_LIB)
+const char protobuf_c_empty_string[] = "";
+#endif
+
+/**
+ * Internal `ProtobufCMessage` manipulation macro.
+ *
+ * Base macro for manipulating a `ProtobufCMessage`. Used by STRUCT_MEMBER() and
+ * STRUCT_MEMBER_PTR().
+ */
+#define STRUCT_MEMBER_P(struct_p, struct_offset) \
+ ((void *) ((uint8_t *) (struct_p) + (struct_offset)))
+
+/**
+ * Return field in a `ProtobufCMessage` based on offset.
+ *
+ * Take a pointer to a `ProtobufCMessage` and find the field at the offset.
+ * Cast it to the passed type.
+ */
+#define STRUCT_MEMBER(member_type, struct_p, struct_offset) \
+ (*(member_type *) STRUCT_MEMBER_P((struct_p), (struct_offset)))
+
+/**
+ * Return field in a `ProtobufCMessage` based on offset.
+ *
+ * Take a pointer to a `ProtobufCMessage` and find the field at the offset. Cast
+ * it to a pointer to the passed type.
+ */
+#define STRUCT_MEMBER_PTR(member_type, struct_p, struct_offset) \
+ ((member_type *) STRUCT_MEMBER_P((struct_p), (struct_offset)))
+
+/* Assertions for magic numbers. */
+
+#define ASSERT_IS_ENUM_DESCRIPTOR(desc) \
+ assert((desc)->magic == PROTOBUF_C__ENUM_DESCRIPTOR_MAGIC)
+
+#define ASSERT_IS_MESSAGE_DESCRIPTOR(desc) \
+ assert((desc)->magic == PROTOBUF_C__MESSAGE_DESCRIPTOR_MAGIC)
+
+#define ASSERT_IS_MESSAGE(message) \
+ ASSERT_IS_MESSAGE_DESCRIPTOR((message)->descriptor)
+
+#define ASSERT_IS_SERVICE_DESCRIPTOR(desc) \
+ assert((desc)->magic == PROTOBUF_C__SERVICE_DESCRIPTOR_MAGIC)
+
+/**@}*/
+
+/* --- version --- */
+
+const char *
+protobuf_c_version(void)
+{
+ return PROTOBUF_C_VERSION;
+}
+
+uint32_t
+protobuf_c_version_number(void)
+{
+ return PROTOBUF_C_VERSION_NUMBER;
+}
+
+/* --- allocator --- */
+
+static void *
+system_alloc(void *allocator_data, size_t size)
+{
+ (void)allocator_data;
+ return malloc(size);
+}
+
+static void
+system_free(void *allocator_data, void *data)
+{
+ (void)allocator_data;
+ free(data);
+}
+
+static inline void *
+do_alloc(ProtobufCAllocator *allocator, size_t size)
+{
+ return allocator->alloc(allocator->allocator_data, size);
+}
+
+static inline void
+do_free(ProtobufCAllocator *allocator, void *data)
+{
+ if (data != NULL)
+ allocator->free(allocator->allocator_data, data);
+}
+
+/*
+ * This allocator uses the system's malloc() and free(). It is the default
+ * allocator used if NULL is passed as the ProtobufCAllocator to an exported
+ * function.
+ */
+static ProtobufCAllocator protobuf_c__allocator = {
+ .alloc = &system_alloc,
+ .free = &system_free,
+ .allocator_data = NULL,
+};
+
+/* === buffer-simple === */
+
+void
+protobuf_c_buffer_simple_append(ProtobufCBuffer *buffer,
+ size_t len, const uint8_t *data)
+{
+ ProtobufCBufferSimple *simp = (ProtobufCBufferSimple *) buffer;
+ size_t new_len = simp->len + len;
+
+ if (new_len > simp->alloced) {
+ ProtobufCAllocator *allocator = simp->allocator;
+ size_t new_alloced = simp->alloced * 2;
+ uint8_t *new_data;
+
+ if (allocator == NULL)
+ allocator = &protobuf_c__allocator;
+ while (new_alloced < new_len)
+ new_alloced += new_alloced;
+ new_data = do_alloc(allocator, new_alloced);
+ if (!new_data)
+ return;
+ memcpy(new_data, simp->data, simp->len);
+ if (simp->must_free_data)
+ do_free(allocator, simp->data);
+ else
+ simp->must_free_data = TRUE;
+ simp->data = new_data;
+ simp->alloced = new_alloced;
+ }
+ memcpy(simp->data + simp->len, data, len);
+ simp->len = new_len;
+}
+
+/**
+ * \defgroup packedsz protobuf_c_message_get_packed_size() implementation
+ *
+ * Routines mainly used by protobuf_c_message_get_packed_size().
+ *
+ * \ingroup internal
+ * @{
+ */
+
+/**
+ * Return the number of bytes required to store the tag for the field. Includes
+ * 3 bits for the wire-type, and a single bit that denotes the end-of-tag.
+ *
+ * \param number
+ * Field tag to encode.
+ * \return
+ * Number of bytes required.
+ */
+static inline size_t
+get_tag_size(uint32_t number)
+{
+ if (number < (1UL << 4)) {
+ return 1;
+ } else if (number < (1UL << 11)) {
+ return 2;
+ } else if (number < (1UL << 18)) {
+ return 3;
+ } else if (number < (1UL << 25)) {
+ return 4;
+ } else {
+ return 5;
+ }
+}
+
+/**
+ * Return the number of bytes required to store a variable-length unsigned
+ * 32-bit integer in base-128 varint encoding.
+ *
+ * \param v
+ * Value to encode.
+ * \return
+ * Number of bytes required.
+ */
+static inline size_t
+uint32_size(uint32_t v)
+{
+ if (v < (1UL << 7)) {
+ return 1;
+ } else if (v < (1UL << 14)) {
+ return 2;
+ } else if (v < (1UL << 21)) {
+ return 3;
+ } else if (v < (1UL << 28)) {
+ return 4;
+ } else {
+ return 5;
+ }
+}
+
+/**
+ * Return the number of bytes required to store a variable-length signed 32-bit
+ * integer in base-128 varint encoding.
+ *
+ * \param v
+ * Value to encode.
+ * \return
+ * Number of bytes required.
+ */
+static inline size_t
+int32_size(int32_t v)
+{
+ if (v < 0) {
+ return 10;
+ } else if (v < (1L << 7)) {
+ return 1;
+ } else if (v < (1L << 14)) {
+ return 2;
+ } else if (v < (1L << 21)) {
+ return 3;
+ } else if (v < (1L << 28)) {
+ return 4;
+ } else {
+ return 5;
+ }
+}
+
+/**
+ * Return the ZigZag-encoded 32-bit unsigned integer form of a 32-bit signed
+ * integer.
+ *
+ * \param v
+ * Value to encode.
+ * \return
+ * ZigZag encoded integer.
+ */
+static inline uint32_t
+zigzag32(int32_t v)
+{
+ // Note: Using unsigned types prevents undefined behavior
+ return ((uint32_t)v << 1) ^ -((uint32_t)v >> 31);
+}
+
+/**
+ * Return the number of bytes required to store a signed 32-bit integer,
+ * converted to an unsigned 32-bit integer with ZigZag encoding, using base-128
+ * varint encoding.
+ *
+ * \param v
+ * Value to encode.
+ * \return
+ * Number of bytes required.
+ */
+static inline size_t
+sint32_size(int32_t v)
+{
+ return uint32_size(zigzag32(v));
+}
+
+/**
+ * Return the number of bytes required to store a 64-bit unsigned integer in
+ * base-128 varint encoding.
+ *
+ * \param v
+ * Value to encode.
+ * \return
+ * Number of bytes required.
+ */
+static inline size_t
+uint64_size(uint64_t v)
+{
+ uint32_t upper_v = (uint32_t) (v >> 32);
+
+ if (upper_v == 0) {
+ return uint32_size((uint32_t) v);
+ } else if (upper_v < (1UL << 3)) {
+ return 5;
+ } else if (upper_v < (1UL << 10)) {
+ return 6;
+ } else if (upper_v < (1UL << 17)) {
+ return 7;
+ } else if (upper_v < (1UL << 24)) {
+ return 8;
+ } else if (upper_v < (1UL << 31)) {
+ return 9;
+ } else {
+ return 10;
+ }
+}
+
+/**
+ * Return the ZigZag-encoded 64-bit unsigned integer form of a 64-bit signed
+ * integer.
+ *
+ * \param v
+ * Value to encode.
+ * \return
+ * ZigZag encoded integer.
+ */
+static inline uint64_t
+zigzag64(int64_t v)
+{
+ // Note: Using unsigned types prevents undefined behavior
+ return ((uint64_t)v << 1) ^ -((uint64_t)v >> 63);
+}
+
+/**
+ * Return the number of bytes required to store a signed 64-bit integer,
+ * converted to an unsigned 64-bit integer with ZigZag encoding, using base-128
+ * varint encoding.
+ *
+ * \param v
+ * Value to encode.
+ * \return
+ * Number of bytes required.
+ */
+static inline size_t
+sint64_size(int64_t v)
+{
+ return uint64_size(zigzag64(v));
+}
+
+/**
+ * Calculate the serialized size of a single required message field, including
+ * the space needed by the preceding tag.
+ *
+ * \param field
+ * Field descriptor for member.
+ * \param member
+ * Field to encode.
+ * \return
+ * Number of bytes required.
+ */
+static size_t
+required_field_get_packed_size(const ProtobufCFieldDescriptor *field,
+ const void *member)
+{
+ size_t rv = get_tag_size(field->id);
+
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_SINT32:
+ return rv + sint32_size(*(const int32_t *) member);
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32:
+ return rv + int32_size(*(const int32_t *) member);
+ case PROTOBUF_C_TYPE_UINT32:
+ return rv + uint32_size(*(const uint32_t *) member);
+ case PROTOBUF_C_TYPE_SINT64:
+ return rv + sint64_size(*(const int64_t *) member);
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ return rv + uint64_size(*(const uint64_t *) member);
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ return rv + 4;
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ return rv + 8;
+ case PROTOBUF_C_TYPE_BOOL:
+ return rv + 1;
+ case PROTOBUF_C_TYPE_FLOAT:
+ return rv + 4;
+ case PROTOBUF_C_TYPE_DOUBLE:
+ return rv + 8;
+ case PROTOBUF_C_TYPE_STRING: {
+ const char *str = *(char * const *) member;
+ size_t len = str ? strlen(str) : 0;
+ return rv + uint32_size(len) + len;
+ }
+ case PROTOBUF_C_TYPE_BYTES: {
+ size_t len = ((const ProtobufCBinaryData *) member)->len;
+ return rv + uint32_size(len) + len;
+ }
+ case PROTOBUF_C_TYPE_MESSAGE: {
+ const ProtobufCMessage *msg = *(ProtobufCMessage * const *) member;
+ size_t subrv = msg ? protobuf_c_message_get_packed_size(msg) : 0;
+ return rv + uint32_size(subrv) + subrv;
+ }
+ }
+ PROTOBUF_C__ASSERT_NOT_REACHED();
+ return 0;
+}
+
+/**
+ * Calculate the serialized size of a single oneof message field, including
+ * the space needed by the preceding tag. Returns 0 if the oneof field isn't
+ * selected or is not set.
+ *
+ * \param field
+ * Field descriptor for member.
+ * \param oneof_case
+ * Enum value that selects the field in the oneof.
+ * \param member
+ * Field to encode.
+ * \return
+ * Number of bytes required.
+ */
+static size_t
+oneof_field_get_packed_size(const ProtobufCFieldDescriptor *field,
+ uint32_t oneof_case,
+ const void *member)
+{
+ if (oneof_case != field->id) {
+ return 0;
+ }
+ if (field->type == PROTOBUF_C_TYPE_MESSAGE ||
+ field->type == PROTOBUF_C_TYPE_STRING)
+ {
+ const void *ptr = *(const void * const *) member;
+ if (ptr == NULL || ptr == field->default_value)
+ return 0;
+ }
+ return required_field_get_packed_size(field, member);
+}
+
+/**
+ * Calculate the serialized size of a single optional message field, including
+ * the space needed by the preceding tag. Returns 0 if the optional field isn't
+ * set.
+ *
+ * \param field
+ * Field descriptor for member.
+ * \param has
+ * True if the field exists, false if not.
+ * \param member
+ * Field to encode.
+ * \return
+ * Number of bytes required.
+ */
+static size_t
+optional_field_get_packed_size(const ProtobufCFieldDescriptor *field,
+ const protobuf_c_boolean has,
+ const void *member)
+{
+ if (field->type == PROTOBUF_C_TYPE_MESSAGE ||
+ field->type == PROTOBUF_C_TYPE_STRING)
+ {
+ const void *ptr = *(const void * const *) member;
+ if (ptr == NULL || ptr == field->default_value)
+ return 0;
+ } else {
+ if (!has)
+ return 0;
+ }
+ return required_field_get_packed_size(field, member);
+}
+
+static protobuf_c_boolean
+field_is_zeroish(const ProtobufCFieldDescriptor *field,
+ const void *member)
+{
+ protobuf_c_boolean ret = FALSE;
+
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_BOOL:
+ ret = (0 == *(const protobuf_c_boolean *) member);
+ break;
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_SINT32:
+ case PROTOBUF_C_TYPE_INT32:
+ case PROTOBUF_C_TYPE_UINT32:
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ ret = (0 == *(const uint32_t *) member);
+ break;
+ case PROTOBUF_C_TYPE_SINT64:
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ ret = (0 == *(const uint64_t *) member);
+ break;
+ case PROTOBUF_C_TYPE_FLOAT:
+ ret = (0 == *(const float *) member);
+ break;
+ case PROTOBUF_C_TYPE_DOUBLE:
+ ret = (0 == *(const double *) member);
+ break;
+ case PROTOBUF_C_TYPE_STRING:
+ ret = (NULL == *(const char * const *) member) ||
+ ('\0' == **(const char * const *) member);
+ break;
+ case PROTOBUF_C_TYPE_BYTES:
+ case PROTOBUF_C_TYPE_MESSAGE:
+ ret = (NULL == *(const void * const *) member);
+ break;
+ default:
+ ret = TRUE;
+ break;
+ }
+
+ return ret;
+}
+
+/**
+ * Calculate the serialized size of a single unlabeled message field, including
+ * the space needed by the preceding tag. Returns 0 if the field isn't set or
+ * if it is set to a "zeroish" value (null pointer or 0 for numerical values).
+ * Unlabeled fields are supported only in proto3.
+ *
+ * \param field
+ * Field descriptor for member.
+ * \param member
+ * Field to encode.
+ * \return
+ * Number of bytes required.
+ */
+static size_t
+unlabeled_field_get_packed_size(const ProtobufCFieldDescriptor *field,
+ const void *member)
+{
+ if (field_is_zeroish(field, member))
+ return 0;
+ return required_field_get_packed_size(field, member);
+}
+
+/**
+ * Calculate the serialized size of repeated message fields, which may consist
+ * of any number of values (including 0). Includes the space needed by the
+ * preceding tags (as needed).
+ *
+ * \param field
+ * Field descriptor for member.
+ * \param count
+ * Number of repeated field members.
+ * \param member
+ * Field to encode.
+ * \return
+ * Number of bytes required.
+ */
+static size_t
+repeated_field_get_packed_size(const ProtobufCFieldDescriptor *field,
+ size_t count, const void *member)
+{
+ size_t header_size;
+ size_t rv = 0;
+ unsigned i;
+ void *array = *(void * const *) member;
+
+ if (count == 0)
+ return 0;
+ header_size = get_tag_size(field->id);
+ if (0 == (field->flags & PROTOBUF_C_FIELD_FLAG_PACKED))
+ header_size *= count;
+
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_SINT32:
+ for (i = 0; i < count; i++)
+ rv += sint32_size(((int32_t *) array)[i]);
+ break;
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32:
+ for (i = 0; i < count; i++)
+ rv += int32_size(((int32_t *) array)[i]);
+ break;
+ case PROTOBUF_C_TYPE_UINT32:
+ for (i = 0; i < count; i++)
+ rv += uint32_size(((uint32_t *) array)[i]);
+ break;
+ case PROTOBUF_C_TYPE_SINT64:
+ for (i = 0; i < count; i++)
+ rv += sint64_size(((int64_t *) array)[i]);
+ break;
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ for (i = 0; i < count; i++)
+ rv += uint64_size(((uint64_t *) array)[i]);
+ break;
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ rv += 4 * count;
+ break;
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ rv += 8 * count;
+ break;
+ case PROTOBUF_C_TYPE_BOOL:
+ rv += count;
+ break;
+ case PROTOBUF_C_TYPE_STRING:
+ for (i = 0; i < count; i++) {
+ size_t len = strlen(((char **) array)[i]);
+ rv += uint32_size(len) + len;
+ }
+ break;
+ case PROTOBUF_C_TYPE_BYTES:
+ for (i = 0; i < count; i++) {
+ size_t len = ((ProtobufCBinaryData *) array)[i].len;
+ rv += uint32_size(len) + len;
+ }
+ break;
+ case PROTOBUF_C_TYPE_MESSAGE:
+ for (i = 0; i < count; i++) {
+ size_t len = protobuf_c_message_get_packed_size(
+ ((ProtobufCMessage **) array)[i]);
+ rv += uint32_size(len) + len;
+ }
+ break;
+ }
+
+ if (0 != (field->flags & PROTOBUF_C_FIELD_FLAG_PACKED))
+ header_size += uint32_size(rv);
+ return header_size + rv;
+}
+
+/**
+ * Calculate the serialized size of an unknown field, i.e. one that is passed
+ * through mostly uninterpreted. This is required for forward compatibility if
+ * new fields are added to the message descriptor.
+ *
+ * \param field
+ * Unknown field type.
+ * \return
+ * Number of bytes required.
+ */
+static inline size_t
+unknown_field_get_packed_size(const ProtobufCMessageUnknownField *field)
+{
+ return get_tag_size(field->tag) + field->len;
+}
+
+/**@}*/
+
+/*
+ * Calculate the serialized size of the message.
+ */
+size_t protobuf_c_message_get_packed_size(const ProtobufCMessage *message)
+{
+ unsigned i;
+ size_t rv = 0;
+
+ ASSERT_IS_MESSAGE(message);
+ for (i = 0; i < message->descriptor->n_fields; i++) {
+ const ProtobufCFieldDescriptor *field =
+ message->descriptor->fields + i;
+ const void *member =
+ ((const char *) message) + field->offset;
+ const void *qmember =
+ ((const char *) message) + field->quantifier_offset;
+
+ if (field->label == PROTOBUF_C_LABEL_REQUIRED) {
+ rv += required_field_get_packed_size(field, member);
+ } else if ((field->label == PROTOBUF_C_LABEL_OPTIONAL ||
+ field->label == PROTOBUF_C_LABEL_NONE) &&
+ (0 != (field->flags & PROTOBUF_C_FIELD_FLAG_ONEOF))) {
+ rv += oneof_field_get_packed_size(
+ field,
+ *(const uint32_t *) qmember,
+ member
+ );
+ } else if (field->label == PROTOBUF_C_LABEL_OPTIONAL) {
+ rv += optional_field_get_packed_size(
+ field,
+ *(protobuf_c_boolean *) qmember,
+ member
+ );
+ } else if (field->label == PROTOBUF_C_LABEL_NONE) {
+ rv += unlabeled_field_get_packed_size(
+ field,
+ member
+ );
+ } else {
+ rv += repeated_field_get_packed_size(
+ field,
+ *(const size_t *) qmember,
+ member
+ );
+ }
+ }
+ for (i = 0; i < message->n_unknown_fields; i++)
+ rv += unknown_field_get_packed_size(&message->unknown_fields[i]);
+ return rv;
+}
+
+/**
+ * \defgroup pack protobuf_c_message_pack() implementation
+ *
+ * Routines mainly used by protobuf_c_message_pack().
+ *
+ * \ingroup internal
+ * @{
+ */
+
+/**
+ * Pack an unsigned 32-bit integer in base-128 varint encoding and return the
+ * number of bytes written, which must be 5 or less.
+ *
+ * \param value
+ * Value to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+uint32_pack(uint32_t value, uint8_t *out)
+{
+ unsigned rv = 0;
+
+ if (value >= 0x80) {
+ out[rv++] = value | 0x80;
+ value >>= 7;
+ if (value >= 0x80) {
+ out[rv++] = value | 0x80;
+ value >>= 7;
+ if (value >= 0x80) {
+ out[rv++] = value | 0x80;
+ value >>= 7;
+ if (value >= 0x80) {
+ out[rv++] = value | 0x80;
+ value >>= 7;
+ }
+ }
+ }
+ }
+ /* assert: value<128 */
+ out[rv++] = value;
+ return rv;
+}
+
+/**
+ * Pack a signed 32-bit integer and return the number of bytes written,
+ * passed as unsigned to avoid implementation-specific behavior.
+ * Negative numbers are encoded as two's complement 64-bit integers.
+ *
+ * \param value
+ * Value to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+int32_pack(uint32_t value, uint8_t *out)
+{
+ if ((int32_t)value < 0) {
+ out[0] = value | 0x80;
+ out[1] = (value >> 7) | 0x80;
+ out[2] = (value >> 14) | 0x80;
+ out[3] = (value >> 21) | 0x80;
+ out[4] = (value >> 28) | 0xf0;
+ out[5] = out[6] = out[7] = out[8] = 0xff;
+ out[9] = 0x01;
+ return 10;
+ } else {
+ return uint32_pack(value, out);
+ }
+}
+
+/**
+ * Pack a signed 32-bit integer using ZigZag encoding and return the number of
+ * bytes written.
+ *
+ * \param value
+ * Value to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+sint32_pack(int32_t value, uint8_t *out)
+{
+ return uint32_pack(zigzag32(value), out);
+}
+
+/**
+ * Pack a 64-bit unsigned integer using base-128 varint encoding and return the
+ * number of bytes written.
+ *
+ * \param value
+ * Value to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static size_t
+uint64_pack(uint64_t value, uint8_t *out)
+{
+ uint32_t hi = (uint32_t) (value >> 32);
+ uint32_t lo = (uint32_t) value;
+ unsigned rv;
+
+ if (hi == 0)
+ return uint32_pack((uint32_t) lo, out);
+ out[0] = (lo) | 0x80;
+ out[1] = (lo >> 7) | 0x80;
+ out[2] = (lo >> 14) | 0x80;
+ out[3] = (lo >> 21) | 0x80;
+ if (hi < 8) {
+ out[4] = (hi << 4) | (lo >> 28);
+ return 5;
+ } else {
+ out[4] = ((hi & 7) << 4) | (lo >> 28) | 0x80;
+ hi >>= 3;
+ }
+ rv = 5;
+ while (hi >= 128) {
+ out[rv++] = hi | 0x80;
+ hi >>= 7;
+ }
+ out[rv++] = hi;
+ return rv;
+}
+
+/**
+ * Pack a 64-bit signed integer in ZigZag encoding and return the number of
+ * bytes written.
+ *
+ * \param value
+ * Value to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+sint64_pack(int64_t value, uint8_t *out)
+{
+ return uint64_pack(zigzag64(value), out);
+}
+
+/**
+ * Pack a 32-bit quantity in little-endian byte order. Used for protobuf wire
+ * types fixed32, sfixed32, float. Similar to "htole32".
+ *
+ * \param value
+ * Value to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+fixed32_pack(uint32_t value, void *out)
+{
+#if !defined(WORDS_BIGENDIAN)
+ memcpy(out, &value, 4);
+#else
+ uint8_t *buf = out;
+
+ buf[0] = value;
+ buf[1] = value >> 8;
+ buf[2] = value >> 16;
+ buf[3] = value >> 24;
+#endif
+ return 4;
+}
+
+/**
+ * Pack a 64-bit quantity in little-endian byte order. Used for protobuf wire
+ * types fixed64, sfixed64, double. Similar to "htole64".
+ *
+ * \todo The big-endian impl is really only good for 32-bit machines, a 64-bit
+ * version would be appreciated, plus a way to decide to use 64-bit math where
+ * convenient.
+ *
+ * \param value
+ * Value to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+fixed64_pack(uint64_t value, void *out)
+{
+#if !defined(WORDS_BIGENDIAN)
+ memcpy(out, &value, 8);
+#else
+ fixed32_pack(value, out);
+ fixed32_pack(value >> 32, ((char *) out) + 4);
+#endif
+ return 8;
+}
+
+/**
+ * Pack a boolean value as an integer and return the number of bytes written.
+ *
+ * \todo Perhaps on some platforms *out = !!value would be a better impl, b/c
+ * that is idiomatic C++ in some STL implementations.
+ *
+ * \param value
+ * Value to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+boolean_pack(protobuf_c_boolean value, uint8_t *out)
+{
+ *out = value ? TRUE : FALSE;
+ return 1;
+}
+
+/**
+ * Pack a NUL-terminated C string and return the number of bytes written. The
+ * output includes a length delimiter.
+ *
+ * The NULL pointer is treated as an empty string. This isn't really necessary,
+ * but it allows people to leave required strings blank. (See Issue #13 in the
+ * bug tracker for a little more explanation).
+ *
+ * \param str
+ * String to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+string_pack(const char *str, uint8_t *out)
+{
+ if (str == NULL) {
+ out[0] = 0;
+ return 1;
+ } else {
+ size_t len = strlen(str);
+ size_t rv = uint32_pack(len, out);
+ memcpy(out + rv, str, len);
+ return rv + len;
+ }
+}
+
+/**
+ * Pack a ProtobufCBinaryData and return the number of bytes written. The output
+ * includes a length delimiter.
+ *
+ * \param bd
+ * ProtobufCBinaryData to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+binary_data_pack(const ProtobufCBinaryData *bd, uint8_t *out)
+{
+ size_t len = bd->len;
+ size_t rv = uint32_pack(len, out);
+ memcpy(out + rv, bd->data, len);
+ return rv + len;
+}
+
+/**
+ * Pack a ProtobufCMessage and return the number of bytes written. The output
+ * includes a length delimiter.
+ *
+ * \param message
+ * ProtobufCMessage object to pack.
+ * \param[out] out
+ * Packed message.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static inline size_t
+prefixed_message_pack(const ProtobufCMessage *message, uint8_t *out)
+{
+ if (message == NULL) {
+ out[0] = 0;
+ return 1;
+ } else {
+ size_t rv = protobuf_c_message_pack(message, out + 1);
+ uint32_t rv_packed_size = uint32_size(rv);
+ if (rv_packed_size != 1)
+ memmove(out + rv_packed_size, out + 1, rv);
+ return uint32_pack(rv, out) + rv;
+ }
+}
+
+/**
+ * Pack a field tag.
+ *
+ * Wire-type will be added in required_field_pack().
+ *
+ * \todo Just call uint64_pack on 64-bit platforms.
+ *
+ * \param id
+ * Tag value to encode.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static size_t
+tag_pack(uint32_t id, uint8_t *out)
+{
+ if (id < (1UL << (32 - 3)))
+ return uint32_pack(id << 3, out);
+ else
+ return uint64_pack(((uint64_t) id) << 3, out);
+}
+
+/**
+ * Pack a required field and return the number of bytes written.
+ *
+ * \param field
+ * Field descriptor.
+ * \param member
+ * The field member.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static size_t
+required_field_pack(const ProtobufCFieldDescriptor *field,
+ const void *member, uint8_t *out)
+{
+ size_t rv = tag_pack(field->id, out);
+
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_SINT32:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ return rv + sint32_pack(*(const int32_t *) member, out + rv);
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ return rv + int32_pack(*(const int32_t *) member, out + rv);
+ case PROTOBUF_C_TYPE_UINT32:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ return rv + uint32_pack(*(const uint32_t *) member, out + rv);
+ case PROTOBUF_C_TYPE_SINT64:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ return rv + sint64_pack(*(const int64_t *) member, out + rv);
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ return rv + uint64_pack(*(const uint64_t *) member, out + rv);
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_32BIT;
+ return rv + fixed32_pack(*(const uint32_t *) member, out + rv);
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_64BIT;
+ return rv + fixed64_pack(*(const uint64_t *) member, out + rv);
+ case PROTOBUF_C_TYPE_BOOL:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ return rv + boolean_pack(*(const protobuf_c_boolean *) member, out + rv);
+ case PROTOBUF_C_TYPE_STRING:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED;
+ return rv + string_pack(*(char *const *) member, out + rv);
+ case PROTOBUF_C_TYPE_BYTES:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED;
+ return rv + binary_data_pack((const ProtobufCBinaryData *) member, out + rv);
+ case PROTOBUF_C_TYPE_MESSAGE:
+ out[0] |= PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED;
+ return rv + prefixed_message_pack(*(ProtobufCMessage * const *) member, out + rv);
+ }
+ PROTOBUF_C__ASSERT_NOT_REACHED();
+ return 0;
+}
+
+/**
+ * Pack a oneof field and return the number of bytes written. Only packs the
+ * field that is selected by the case enum.
+ *
+ * \param field
+ * Field descriptor.
+ * \param oneof_case
+ * Enum value that selects the field in the oneof.
+ * \param member
+ * The field member.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static size_t
+oneof_field_pack(const ProtobufCFieldDescriptor *field,
+ uint32_t oneof_case,
+ const void *member, uint8_t *out)
+{
+ if (oneof_case != field->id) {
+ return 0;
+ }
+ if (field->type == PROTOBUF_C_TYPE_MESSAGE ||
+ field->type == PROTOBUF_C_TYPE_STRING)
+ {
+ const void *ptr = *(const void * const *) member;
+ if (ptr == NULL || ptr == field->default_value)
+ return 0;
+ }
+ return required_field_pack(field, member, out);
+}
+
+/**
+ * Pack an optional field and return the number of bytes written.
+ *
+ * \param field
+ * Field descriptor.
+ * \param has
+ * Whether the field is set.
+ * \param member
+ * The field member.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static size_t
+optional_field_pack(const ProtobufCFieldDescriptor *field,
+ const protobuf_c_boolean has,
+ const void *member, uint8_t *out)
+{
+ if (field->type == PROTOBUF_C_TYPE_MESSAGE ||
+ field->type == PROTOBUF_C_TYPE_STRING)
+ {
+ const void *ptr = *(const void * const *) member;
+ if (ptr == NULL || ptr == field->default_value)
+ return 0;
+ } else {
+ if (!has)
+ return 0;
+ }
+ return required_field_pack(field, member, out);
+}
+
+/**
+ * Pack an unlabeled field and return the number of bytes written.
+ *
+ * \param field
+ * Field descriptor.
+ * \param member
+ * The field member.
+ * \param[out] out
+ * Packed value.
+ * \return
+ * Number of bytes written to `out`.
+ */
+static size_t
+unlabeled_field_pack(const ProtobufCFieldDescriptor *field,
+ const void *member, uint8_t *out)
+{
+ if (field_is_zeroish(field, member))
+ return 0;
+ return required_field_pack(field, member, out);
+}
+
+/**
+ * Given a field type, return the in-memory size.
+ *
+ * \todo Implement as a table lookup.
+ *
+ * \param type
+ * Field type.
+ * \return
+ * Size of the field.
+ */
+static inline size_t
+sizeof_elt_in_repeated_array(ProtobufCType type)
+{
+ switch (type) {
+ case PROTOBUF_C_TYPE_SINT32:
+ case PROTOBUF_C_TYPE_INT32:
+ case PROTOBUF_C_TYPE_UINT32:
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ case PROTOBUF_C_TYPE_ENUM:
+ return 4;
+ case PROTOBUF_C_TYPE_SINT64:
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ return 8;
+ case PROTOBUF_C_TYPE_BOOL:
+ return sizeof(protobuf_c_boolean);
+ case PROTOBUF_C_TYPE_STRING:
+ case PROTOBUF_C_TYPE_MESSAGE:
+ return sizeof(void *);
+ case PROTOBUF_C_TYPE_BYTES:
+ return sizeof(ProtobufCBinaryData);
+ }
+ PROTOBUF_C__ASSERT_NOT_REACHED();
+ return 0;
+}
+
+/**
+ * Pack an array of 32-bit quantities.
+ *
+ * \param[out] out
+ * Destination.
+ * \param[in] in
+ * Source.
+ * \param[in] n
+ * Number of elements in the source array.
+ */
+static void
+copy_to_little_endian_32(void *out, const void *in, const unsigned n)
+{
+#if !defined(WORDS_BIGENDIAN)
+ memcpy(out, in, n * 4);
+#else
+ unsigned i;
+ const uint32_t *ini = in;
+ for (i = 0; i < n; i++)
+ fixed32_pack(ini[i], (uint32_t *) out + i);
+#endif
+}
+
+/**
+ * Pack an array of 64-bit quantities.
+ *
+ * \param[out] out
+ * Destination.
+ * \param[in] in
+ * Source.
+ * \param[in] n
+ * Number of elements in the source array.
+ */
+static void
+copy_to_little_endian_64(void *out, const void *in, const unsigned n)
+{
+#if !defined(WORDS_BIGENDIAN)
+ memcpy(out, in, n * 8);
+#else
+ unsigned i;
+ const uint64_t *ini = in;
+ for (i = 0; i < n; i++)
+ fixed64_pack(ini[i], (uint64_t *) out + i);
+#endif
+}
+
+/**
+ * Get the minimum number of bytes required to pack a field value of a
+ * particular type.
+ *
+ * \param type
+ * Field type.
+ * \return
+ * Number of bytes.
+ */
+static unsigned
+get_type_min_size(ProtobufCType type)
+{
+ if (type == PROTOBUF_C_TYPE_SFIXED32 ||
+ type == PROTOBUF_C_TYPE_FIXED32 ||
+ type == PROTOBUF_C_TYPE_FLOAT)
+ {
+ return 4;
+ }
+ if (type == PROTOBUF_C_TYPE_SFIXED64 ||
+ type == PROTOBUF_C_TYPE_FIXED64 ||
+ type == PROTOBUF_C_TYPE_DOUBLE)
+ {
+ return 8;
+ }
+ return 1;
+}
+
+/**
+ * Packs the elements of a repeated field and returns the serialised field and
+ * its length.
+ *
+ * \param field
+ * Field descriptor.
+ * \param count
+ * Number of elements in the repeated field array.
+ * \param member
+ * Pointer to the elements for this repeated field.
+ * \param[out] out
+ * Serialised representation of the repeated field.
+ * \return
+ * Number of bytes serialised to `out`.
+ */
+static size_t
+repeated_field_pack(const ProtobufCFieldDescriptor *field,
+ size_t count, const void *member, uint8_t *out)
+{
+ void *array = *(void * const *) member;
+ unsigned i;
+
+ if (0 != (field->flags & PROTOBUF_C_FIELD_FLAG_PACKED)) {
+ unsigned header_len;
+ unsigned len_start;
+ unsigned min_length;
+ unsigned payload_len;
+ unsigned length_size_min;
+ unsigned actual_length_size;
+ uint8_t *payload_at;
+
+ if (count == 0)
+ return 0;
+ header_len = tag_pack(field->id, out);
+ out[0] |= PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED;
+ len_start = header_len;
+ min_length = get_type_min_size(field->type) * count;
+ length_size_min = uint32_size(min_length);
+ header_len += length_size_min;
+ payload_at = out + header_len;
+
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ copy_to_little_endian_32(payload_at, array, count);
+ payload_at += count * 4;
+ break;
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ copy_to_little_endian_64(payload_at, array, count);
+ payload_at += count * 8;
+ break;
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32: {
+ const int32_t *arr = (const int32_t *) array;
+ for (i = 0; i < count; i++)
+ payload_at += int32_pack(arr[i], payload_at);
+ break;
+ }
+ case PROTOBUF_C_TYPE_SINT32: {
+ const int32_t *arr = (const int32_t *) array;
+ for (i = 0; i < count; i++)
+ payload_at += sint32_pack(arr[i], payload_at);
+ break;
+ }
+ case PROTOBUF_C_TYPE_SINT64: {
+ const int64_t *arr = (const int64_t *) array;
+ for (i = 0; i < count; i++)
+ payload_at += sint64_pack(arr[i], payload_at);
+ break;
+ }
+ case PROTOBUF_C_TYPE_UINT32: {
+ const uint32_t *arr = (const uint32_t *) array;
+ for (i = 0; i < count; i++)
+ payload_at += uint32_pack(arr[i], payload_at);
+ break;
+ }
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64: {
+ const uint64_t *arr = (const uint64_t *) array;
+ for (i = 0; i < count; i++)
+ payload_at += uint64_pack(arr[i], payload_at);
+ break;
+ }
+ case PROTOBUF_C_TYPE_BOOL: {
+ const protobuf_c_boolean *arr = (const protobuf_c_boolean *) array;
+ for (i = 0; i < count; i++)
+ payload_at += boolean_pack(arr[i], payload_at);
+ break;
+ }
+ default:
+ PROTOBUF_C__ASSERT_NOT_REACHED();
+ }
+
+ payload_len = payload_at - (out + header_len);
+ actual_length_size = uint32_size(payload_len);
+ if (length_size_min != actual_length_size) {
+ assert(actual_length_size == length_size_min + 1);
+ memmove(out + header_len + 1, out + header_len,
+ payload_len);
+ header_len++;
+ }
+ uint32_pack(payload_len, out + len_start);
+ return header_len + payload_len;
+ } else {
+ /* not "packed" cased */
+ /* CONSIDER: optimize this case a bit (by putting the loop inside the switch) */
+ size_t rv = 0;
+ unsigned siz = sizeof_elt_in_repeated_array(field->type);
+
+ for (i = 0; i < count; i++) {
+ rv += required_field_pack(field, array, out + rv);
+ array = (char *)array + siz;
+ }
+ return rv;
+ }
+}
+
+static size_t
+unknown_field_pack(const ProtobufCMessageUnknownField *field, uint8_t *out)
+{
+ size_t rv = tag_pack(field->tag, out);
+ out[0] |= field->wire_type;
+ memcpy(out + rv, field->data, field->len);
+ return rv + field->len;
+}
+
+/**@}*/
+
+size_t
+protobuf_c_message_pack(const ProtobufCMessage *message, uint8_t *out)
+{
+ unsigned i;
+ size_t rv = 0;
+
+ ASSERT_IS_MESSAGE(message);
+ for (i = 0; i < message->descriptor->n_fields; i++) {
+ const ProtobufCFieldDescriptor *field =
+ message->descriptor->fields + i;
+ const void *member = ((const char *) message) + field->offset;
+
+ /*
+ * It doesn't hurt to compute qmember (a pointer to the
+ * quantifier field of the structure), but the pointer is only
+ * valid if the field is:
+ * - a repeated field, or
+ * - a field that is part of a oneof
+ * - an optional field that isn't a pointer type
+ * (Meaning: not a message or a string).
+ */
+ const void *qmember =
+ ((const char *) message) + field->quantifier_offset;
+
+ if (field->label == PROTOBUF_C_LABEL_REQUIRED) {
+ rv += required_field_pack(field, member, out + rv);
+ } else if ((field->label == PROTOBUF_C_LABEL_OPTIONAL ||
+ field->label == PROTOBUF_C_LABEL_NONE) &&
+ (0 != (field->flags & PROTOBUF_C_FIELD_FLAG_ONEOF))) {
+ rv += oneof_field_pack(
+ field,
+ *(const uint32_t *) qmember,
+ member,
+ out + rv
+ );
+ } else if (field->label == PROTOBUF_C_LABEL_OPTIONAL) {
+ rv += optional_field_pack(
+ field,
+ *(const protobuf_c_boolean *) qmember,
+ member,
+ out + rv
+ );
+ } else if (field->label == PROTOBUF_C_LABEL_NONE) {
+ rv += unlabeled_field_pack(field, member, out + rv);
+ } else {
+ rv += repeated_field_pack(field, *(const size_t *) qmember,
+ member, out + rv);
+ }
+ }
+ for (i = 0; i < message->n_unknown_fields; i++)
+ rv += unknown_field_pack(&message->unknown_fields[i], out + rv);
+ return rv;
+}
+
+/**
+ * \defgroup packbuf protobuf_c_message_pack_to_buffer() implementation
+ *
+ * Routines mainly used by protobuf_c_message_pack_to_buffer().
+ *
+ * \ingroup internal
+ * @{
+ */
+
+/**
+ * Pack a required field to a virtual buffer.
+ *
+ * \param field
+ * Field descriptor.
+ * \param member
+ * The element to be packed.
+ * \param[out] buffer
+ * Virtual buffer to append data to.
+ * \return
+ * Number of bytes packed.
+ */
+static size_t
+required_field_pack_to_buffer(const ProtobufCFieldDescriptor *field,
+ const void *member, ProtobufCBuffer *buffer)
+{
+ size_t rv;
+ uint8_t scratch[MAX_UINT64_ENCODED_SIZE * 2];
+
+ rv = tag_pack(field->id, scratch);
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_SINT32:
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ rv += sint32_pack(*(const int32_t *) member, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ break;
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32:
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ rv += int32_pack(*(const int32_t *) member, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ break;
+ case PROTOBUF_C_TYPE_UINT32:
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ rv += uint32_pack(*(const uint32_t *) member, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ break;
+ case PROTOBUF_C_TYPE_SINT64:
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ rv += sint64_pack(*(const int64_t *) member, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ break;
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ rv += uint64_pack(*(const uint64_t *) member, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ break;
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_32BIT;
+ rv += fixed32_pack(*(const uint32_t *) member, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ break;
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_64BIT;
+ rv += fixed64_pack(*(const uint64_t *) member, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ break;
+ case PROTOBUF_C_TYPE_BOOL:
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_VARINT;
+ rv += boolean_pack(*(const protobuf_c_boolean *) member, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ break;
+ case PROTOBUF_C_TYPE_STRING: {
+ const char *str = *(char *const *) member;
+ size_t sublen = str ? strlen(str) : 0;
+
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED;
+ rv += uint32_pack(sublen, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ buffer->append(buffer, sublen, (const uint8_t *) str);
+ rv += sublen;
+ break;
+ }
+ case PROTOBUF_C_TYPE_BYTES: {
+ const ProtobufCBinaryData *bd = ((const ProtobufCBinaryData *) member);
+ size_t sublen = bd->len;
+
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED;
+ rv += uint32_pack(sublen, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ buffer->append(buffer, sublen, bd->data);
+ rv += sublen;
+ break;
+ }
+ case PROTOBUF_C_TYPE_MESSAGE: {
+ const ProtobufCMessage *msg = *(ProtobufCMessage * const *) member;
+
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED;
+ if (msg == NULL) {
+ rv += uint32_pack(0, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ } else {
+ size_t sublen = protobuf_c_message_get_packed_size(msg);
+ rv += uint32_pack(sublen, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ protobuf_c_message_pack_to_buffer(msg, buffer);
+ rv += sublen;
+ }
+ break;
+ }
+ default:
+ PROTOBUF_C__ASSERT_NOT_REACHED();
+ }
+ return rv;
+}
+
+/**
+ * Pack a oneof field to a buffer. Only packs the field that is selected by the case enum.
+ *
+ * \param field
+ * Field descriptor.
+ * \param oneof_case
+ * Enum value that selects the field in the oneof.
+ * \param member
+ * The element to be packed.
+ * \param[out] buffer
+ * Virtual buffer to append data to.
+ * \return
+ * Number of bytes serialised to `buffer`.
+ */
+static size_t
+oneof_field_pack_to_buffer(const ProtobufCFieldDescriptor *field,
+ uint32_t oneof_case,
+ const void *member, ProtobufCBuffer *buffer)
+{
+ if (oneof_case != field->id) {
+ return 0;
+ }
+ if (field->type == PROTOBUF_C_TYPE_MESSAGE ||
+ field->type == PROTOBUF_C_TYPE_STRING)
+ {
+ const void *ptr = *(const void *const *) member;
+ if (ptr == NULL || ptr == field->default_value)
+ return 0;
+ }
+ return required_field_pack_to_buffer(field, member, buffer);
+}
+
+/**
+ * Pack an optional field to a buffer.
+ *
+ * \param field
+ * Field descriptor.
+ * \param has
+ * Whether the field is set.
+ * \param member
+ * The element to be packed.
+ * \param[out] buffer
+ * Virtual buffer to append data to.
+ * \return
+ * Number of bytes serialised to `buffer`.
+ */
+static size_t
+optional_field_pack_to_buffer(const ProtobufCFieldDescriptor *field,
+ const protobuf_c_boolean has,
+ const void *member, ProtobufCBuffer *buffer)
+{
+ if (field->type == PROTOBUF_C_TYPE_MESSAGE ||
+ field->type == PROTOBUF_C_TYPE_STRING)
+ {
+ const void *ptr = *(const void *const *) member;
+ if (ptr == NULL || ptr == field->default_value)
+ return 0;
+ } else {
+ if (!has)
+ return 0;
+ }
+ return required_field_pack_to_buffer(field, member, buffer);
+}
+
+/**
+ * Pack an unlabeled field to a buffer.
+ *
+ * \param field
+ * Field descriptor.
+ * \param member
+ * The element to be packed.
+ * \param[out] buffer
+ * Virtual buffer to append data to.
+ * \return
+ * Number of bytes serialised to `buffer`.
+ */
+static size_t
+unlabeled_field_pack_to_buffer(const ProtobufCFieldDescriptor *field,
+ const void *member, ProtobufCBuffer *buffer)
+{
+ if (field_is_zeroish(field, member))
+ return 0;
+ return required_field_pack_to_buffer(field, member, buffer);
+}
+
+/**
+ * Get the packed size of an array of same field type.
+ *
+ * \param field
+ * Field descriptor.
+ * \param count
+ * Number of elements of this type.
+ * \param array
+ * The elements to get the size of.
+ * \return
+ * Number of bytes required.
+ */
+static size_t
+get_packed_payload_length(const ProtobufCFieldDescriptor *field,
+ unsigned count, const void *array)
+{
+ unsigned rv = 0;
+ unsigned i;
+
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ return count * 4;
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ return count * 8;
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32: {
+ const int32_t *arr = (const int32_t *) array;
+ for (i = 0; i < count; i++)
+ rv += int32_size(arr[i]);
+ break;
+ }
+ case PROTOBUF_C_TYPE_SINT32: {
+ const int32_t *arr = (const int32_t *) array;
+ for (i = 0; i < count; i++)
+ rv += sint32_size(arr[i]);
+ break;
+ }
+ case PROTOBUF_C_TYPE_UINT32: {
+ const uint32_t *arr = (const uint32_t *) array;
+ for (i = 0; i < count; i++)
+ rv += uint32_size(arr[i]);
+ break;
+ }
+ case PROTOBUF_C_TYPE_SINT64: {
+ const int64_t *arr = (const int64_t *) array;
+ for (i = 0; i < count; i++)
+ rv += sint64_size(arr[i]);
+ break;
+ }
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64: {
+ const uint64_t *arr = (const uint64_t *) array;
+ for (i = 0; i < count; i++)
+ rv += uint64_size(arr[i]);
+ break;
+ }
+ case PROTOBUF_C_TYPE_BOOL:
+ return count;
+ default:
+ PROTOBUF_C__ASSERT_NOT_REACHED();
+ }
+ return rv;
+}
+
+/**
+ * Pack an array of same field type to a virtual buffer.
+ *
+ * \param field
+ * Field descriptor.
+ * \param count
+ * Number of elements of this type.
+ * \param array
+ * The elements to get the size of.
+ * \param[out] buffer
+ * Virtual buffer to append data to.
+ * \return
+ * Number of bytes packed.
+ */
+static size_t
+pack_buffer_packed_payload(const ProtobufCFieldDescriptor *field,
+ unsigned count, const void *array,
+ ProtobufCBuffer *buffer)
+{
+ uint8_t scratch[16];
+ size_t rv = 0;
+ unsigned i;
+
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+#if !defined(WORDS_BIGENDIAN)
+ rv = count * 4;
+ goto no_packing_needed;
+#else
+ for (i = 0; i < count; i++) {
+ unsigned len = fixed32_pack(((uint32_t *) array)[i], scratch);
+ buffer->append(buffer, len, scratch);
+ rv += len;
+ }
+ break;
+#endif
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+#if !defined(WORDS_BIGENDIAN)
+ rv = count * 8;
+ goto no_packing_needed;
+#else
+ for (i = 0; i < count; i++) {
+ unsigned len = fixed64_pack(((uint64_t *) array)[i], scratch);
+ buffer->append(buffer, len, scratch);
+ rv += len;
+ }
+ break;
+#endif
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32:
+ for (i = 0; i < count; i++) {
+ unsigned len = int32_pack(((int32_t *) array)[i], scratch);
+ buffer->append(buffer, len, scratch);
+ rv += len;
+ }
+ break;
+ case PROTOBUF_C_TYPE_SINT32:
+ for (i = 0; i < count; i++) {
+ unsigned len = sint32_pack(((int32_t *) array)[i], scratch);
+ buffer->append(buffer, len, scratch);
+ rv += len;
+ }
+ break;
+ case PROTOBUF_C_TYPE_UINT32:
+ for (i = 0; i < count; i++) {
+ unsigned len = uint32_pack(((uint32_t *) array)[i], scratch);
+ buffer->append(buffer, len, scratch);
+ rv += len;
+ }
+ break;
+ case PROTOBUF_C_TYPE_SINT64:
+ for (i = 0; i < count; i++) {
+ unsigned len = sint64_pack(((int64_t *) array)[i], scratch);
+ buffer->append(buffer, len, scratch);
+ rv += len;
+ }
+ break;
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ for (i = 0; i < count; i++) {
+ unsigned len = uint64_pack(((uint64_t *) array)[i], scratch);
+ buffer->append(buffer, len, scratch);
+ rv += len;
+ }
+ break;
+ case PROTOBUF_C_TYPE_BOOL:
+ for (i = 0; i < count; i++) {
+ unsigned len = boolean_pack(((protobuf_c_boolean *) array)[i], scratch);
+ buffer->append(buffer, len, scratch);
+ rv += len;
+ }
+ return count;
+ default:
+ PROTOBUF_C__ASSERT_NOT_REACHED();
+ }
+ return rv;
+
+#if !defined(WORDS_BIGENDIAN)
+no_packing_needed:
+ buffer->append(buffer, rv, array);
+ return rv;
+#endif
+}
+
+static size_t
+repeated_field_pack_to_buffer(const ProtobufCFieldDescriptor *field,
+ unsigned count, const void *member,
+ ProtobufCBuffer *buffer)
+{
+ char *array = *(char * const *) member;
+
+ if (count == 0)
+ return 0;
+ if (0 != (field->flags & PROTOBUF_C_FIELD_FLAG_PACKED)) {
+ uint8_t scratch[MAX_UINT64_ENCODED_SIZE * 2];
+ size_t rv = tag_pack(field->id, scratch);
+ size_t payload_len = get_packed_payload_length(field, count, array);
+ size_t tmp;
+
+ scratch[0] |= PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED;
+ rv += uint32_pack(payload_len, scratch + rv);
+ buffer->append(buffer, rv, scratch);
+ tmp = pack_buffer_packed_payload(field, count, array, buffer);
+ assert(tmp == payload_len);
+ return rv + payload_len;
+ } else {
+ size_t siz;
+ unsigned i;
+ /* CONSIDER: optimize this case a bit (by putting the loop inside the switch) */
+ unsigned rv = 0;
+
+ siz = sizeof_elt_in_repeated_array(field->type);
+ for (i = 0; i < count; i++) {
+ rv += required_field_pack_to_buffer(field, array, buffer);
+ array += siz;
+ }
+ return rv;
+ }
+}
+
+static size_t
+unknown_field_pack_to_buffer(const ProtobufCMessageUnknownField *field,
+ ProtobufCBuffer *buffer)
+{
+ uint8_t header[MAX_UINT64_ENCODED_SIZE];
+ size_t rv = tag_pack(field->tag, header);
+
+ header[0] |= field->wire_type;
+ buffer->append(buffer, rv, header);
+ buffer->append(buffer, field->len, field->data);
+ return rv + field->len;
+}
+
+/**@}*/
+
+size_t
+protobuf_c_message_pack_to_buffer(const ProtobufCMessage *message,
+ ProtobufCBuffer *buffer)
+{
+ unsigned i;
+ size_t rv = 0;
+
+ ASSERT_IS_MESSAGE(message);
+ for (i = 0; i < message->descriptor->n_fields; i++) {
+ const ProtobufCFieldDescriptor *field =
+ message->descriptor->fields + i;
+ const void *member =
+ ((const char *) message) + field->offset;
+ const void *qmember =
+ ((const char *) message) + field->quantifier_offset;
+
+ if (field->label == PROTOBUF_C_LABEL_REQUIRED) {
+ rv += required_field_pack_to_buffer(field, member, buffer);
+ } else if ((field->label == PROTOBUF_C_LABEL_OPTIONAL ||
+ field->label == PROTOBUF_C_LABEL_NONE) &&
+ (0 != (field->flags & PROTOBUF_C_FIELD_FLAG_ONEOF))) {
+ rv += oneof_field_pack_to_buffer(
+ field,
+ *(const uint32_t *) qmember,
+ member,
+ buffer
+ );
+ } else if (field->label == PROTOBUF_C_LABEL_OPTIONAL) {
+ rv += optional_field_pack_to_buffer(
+ field,
+ *(const protobuf_c_boolean *) qmember,
+ member,
+ buffer
+ );
+ } else if (field->label == PROTOBUF_C_LABEL_NONE) {
+ rv += unlabeled_field_pack_to_buffer(
+ field,
+ member,
+ buffer
+ );
+ } else {
+ rv += repeated_field_pack_to_buffer(
+ field,
+ *(const size_t *) qmember,
+ member,
+ buffer
+ );
+ }
+ }
+ for (i = 0; i < message->n_unknown_fields; i++)
+ rv += unknown_field_pack_to_buffer(&message->unknown_fields[i], buffer);
+
+ return rv;
+}
+
+/**
+ * \defgroup unpack unpacking implementation
+ *
+ * Routines mainly used by the unpacking functions.
+ *
+ * \ingroup internal
+ * @{
+ */
+
+static inline int
+int_range_lookup(unsigned n_ranges, const ProtobufCIntRange *ranges, int value)
+{
+ unsigned n;
+ unsigned start;
+
+ if (n_ranges == 0)
+ return -1;
+ start = 0;
+ n = n_ranges;
+ while (n > 1) {
+ unsigned mid = start + n / 2;
+
+ if (value < ranges[mid].start_value) {
+ n = mid - start;
+ } else if (value >= ranges[mid].start_value +
+ (int) (ranges[mid + 1].orig_index -
+ ranges[mid].orig_index))
+ {
+ unsigned new_start = mid + 1;
+ n = start + n - new_start;
+ start = new_start;
+ } else
+ return (value - ranges[mid].start_value) +
+ ranges[mid].orig_index;
+ }
+ if (n > 0) {
+ unsigned start_orig_index = ranges[start].orig_index;
+ unsigned range_size =
+ ranges[start + 1].orig_index - start_orig_index;
+
+ if (ranges[start].start_value <= value &&
+ value < (int) (ranges[start].start_value + range_size))
+ {
+ return (value - ranges[start].start_value) +
+ start_orig_index;
+ }
+ }
+ return -1;
+}
+
+static size_t
+parse_tag_and_wiretype(size_t len,
+ const uint8_t *data,
+ uint32_t *tag_out,
+ uint8_t *wiretype_out)
+{
+ unsigned max_rv = len > 5 ? 5 : len;
+ uint32_t tag = (data[0] & 0x7f) >> 3;
+ unsigned shift = 4;
+ unsigned rv;
+
+ /* 0 is not a valid tag value */
+ if ((data[0] & 0xf8) == 0) {
+ return 0;
+ }
+
+ *wiretype_out = data[0] & 7;
+ if ((data[0] & 0x80) == 0) {
+ *tag_out = tag;
+ return 1;
+ }
+ for (rv = 1; rv < max_rv; rv++) {
+ if (data[rv] & 0x80) {
+ tag |= (data[rv] & 0x7f) << shift;
+ shift += 7;
+ } else {
+ tag |= data[rv] << shift;
+ *tag_out = tag;
+ return rv + 1;
+ }
+ }
+ return 0; /* error: bad header */
+}
+
+/* sizeof(ScannedMember) must be <= (1UL<<BOUND_SIZEOF_SCANNED_MEMBER_LOG2) */
+#define BOUND_SIZEOF_SCANNED_MEMBER_LOG2 5
+typedef struct ScannedMember ScannedMember;
+/** Field as it's being read. */
+struct ScannedMember {
+ uint32_t tag; /**< Field tag. */
+ uint8_t wire_type; /**< Field type. */
+ uint8_t length_prefix_len; /**< Prefix length. */
+ const ProtobufCFieldDescriptor *field; /**< Field descriptor. */
+ size_t len; /**< Field length. */
+ const uint8_t *data; /**< Pointer to field data. */
+};
+
+static inline size_t
+scan_length_prefixed_data(size_t len, const uint8_t *data,
+ size_t *prefix_len_out)
+{
+ unsigned hdr_max = len < 5 ? len : 5;
+ unsigned hdr_len;
+ size_t val = 0;
+ unsigned i;
+ unsigned shift = 0;
+
+ for (i = 0; i < hdr_max; i++) {
+ val |= ((size_t)data[i] & 0x7f) << shift;
+ shift += 7;
+ if ((data[i] & 0x80) == 0)
+ break;
+ }
+ if (i == hdr_max) {
+ PROTOBUF_C_UNPACK_ERROR("error parsing length for length-prefixed data");
+ return 0;
+ }
+ hdr_len = i + 1;
+ *prefix_len_out = hdr_len;
+ if (val > INT_MAX) {
+ // Protobuf messages should always be less than 2 GiB in size.
+ // We also want to return early here so that hdr_len + val does
+ // not overflow on 32-bit systems.
+ PROTOBUF_C_UNPACK_ERROR("length prefix of %lu is too large",
+ (unsigned long int)val);
+ return 0;
+ }
+ if (hdr_len + val > len) {
+ PROTOBUF_C_UNPACK_ERROR("data too short after length-prefix of %lu",
+ (unsigned long int)val);
+ return 0;
+ }
+ return hdr_len + val;
+}
+
+static size_t
+max_b128_numbers(size_t len, const uint8_t *data)
+{
+ size_t rv = 0;
+ while (len--)
+ if ((*data++ & 0x80) == 0)
+ ++rv;
+ return rv;
+}
+
+/**@}*/
+
+/**
+ * Merge earlier message into a latter message.
+ *
+ * For numeric types and strings, if the same value appears multiple
+ * times, the parser accepts the last value it sees. For embedded
+ * message fields, the parser merges multiple instances of the same
+ * field. That is, all singular scalar fields in the latter instance
+ * replace those in the former, singular embedded messages are merged,
+ * and repeated fields are concatenated.
+ *
+ * The earlier message should be freed after calling this function, as
+ * some of its fields may have been reused and changed to their default
+ * values during the merge.
+ */
+static protobuf_c_boolean
+merge_messages(ProtobufCMessage *earlier_msg,
+ ProtobufCMessage *latter_msg,
+ ProtobufCAllocator *allocator)
+{
+ unsigned i;
+ const ProtobufCFieldDescriptor *fields =
+ latter_msg->descriptor->fields;
+ for (i = 0; i < latter_msg->descriptor->n_fields; i++) {
+ if (fields[i].label == PROTOBUF_C_LABEL_REPEATED) {
+ size_t *n_earlier =
+ STRUCT_MEMBER_PTR(size_t, earlier_msg,
+ fields[i].quantifier_offset);
+ uint8_t **p_earlier =
+ STRUCT_MEMBER_PTR(uint8_t *, earlier_msg,
+ fields[i].offset);
+ size_t *n_latter =
+ STRUCT_MEMBER_PTR(size_t, latter_msg,
+ fields[i].quantifier_offset);
+ uint8_t **p_latter =
+ STRUCT_MEMBER_PTR(uint8_t *, latter_msg,
+ fields[i].offset);
+
+ if (*n_earlier > 0) {
+ if (*n_latter > 0) {
+ /* Concatenate the repeated field */
+ size_t el_size =
+ sizeof_elt_in_repeated_array(fields[i].type);
+ uint8_t *new_field;
+
+ new_field = do_alloc(allocator,
+ (*n_earlier + *n_latter) * el_size);
+ if (!new_field)
+ return FALSE;
+
+ memcpy(new_field, *p_earlier,
+ *n_earlier * el_size);
+ memcpy(new_field +
+ *n_earlier * el_size,
+ *p_latter,
+ *n_latter * el_size);
+
+ do_free(allocator, *p_latter);
+ do_free(allocator, *p_earlier);
+ *p_latter = new_field;
+ *n_latter = *n_earlier + *n_latter;
+ } else {
+ /* Zero copy the repeated field from the earlier message */
+ *n_latter = *n_earlier;
+ *p_latter = *p_earlier;
+ }
+ /* Make sure the field does not get double freed */
+ *n_earlier = 0;
+ *p_earlier = 0;
+ }
+ } else if (fields[i].label == PROTOBUF_C_LABEL_OPTIONAL ||
+ fields[i].label == PROTOBUF_C_LABEL_NONE) {
+ const ProtobufCFieldDescriptor *field;
+ uint32_t *earlier_case_p = STRUCT_MEMBER_PTR(uint32_t,
+ earlier_msg,
+ fields[i].
+ quantifier_offset);
+ uint32_t *latter_case_p = STRUCT_MEMBER_PTR(uint32_t,
+ latter_msg,
+ fields[i].
+ quantifier_offset);
+ protobuf_c_boolean need_to_merge = FALSE;
+ void *earlier_elem;
+ void *latter_elem;
+ const void *def_val;
+
+ if (fields[i].flags & PROTOBUF_C_FIELD_FLAG_ONEOF) {
+ if (*latter_case_p == 0) {
+ /* lookup correct oneof field */
+ int field_index =
+ int_range_lookup(
+ latter_msg->descriptor
+ ->n_field_ranges,
+ latter_msg->descriptor
+ ->field_ranges,
+ *earlier_case_p);
+ if (field_index < 0)
+ return FALSE;
+ field = latter_msg->descriptor->fields +
+ field_index;
+ } else {
+ /* Oneof is present in the latter message, move on */
+ continue;
+ }
+ } else {
+ field = &fields[i];
+ }
+
+ earlier_elem = STRUCT_MEMBER_P(earlier_msg, field->offset);
+ latter_elem = STRUCT_MEMBER_P(latter_msg, field->offset);
+ def_val = field->default_value;
+
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_MESSAGE: {
+ ProtobufCMessage *em = *(ProtobufCMessage **) earlier_elem;
+ ProtobufCMessage *lm = *(ProtobufCMessage **) latter_elem;
+ if (em != NULL) {
+ if (lm != NULL) {
+ if (!merge_messages(em, lm, allocator))
+ return FALSE;
+ /* Already merged */
+ need_to_merge = FALSE;
+ } else {
+ /* Zero copy the message */
+ need_to_merge = TRUE;
+ }
+ }
+ break;
+ }
+ case PROTOBUF_C_TYPE_BYTES: {
+ uint8_t *e_data =
+ ((ProtobufCBinaryData *) earlier_elem)->data;
+ uint8_t *l_data =
+ ((ProtobufCBinaryData *) latter_elem)->data;
+ const ProtobufCBinaryData *d_bd =
+ (ProtobufCBinaryData *) def_val;
+
+ need_to_merge =
+ (e_data != NULL &&
+ (d_bd == NULL ||
+ e_data != d_bd->data)) &&
+ (l_data == NULL ||
+ (d_bd != NULL &&
+ l_data == d_bd->data));
+ break;
+ }
+ case PROTOBUF_C_TYPE_STRING: {
+ char *e_str = *(char **) earlier_elem;
+ char *l_str = *(char **) latter_elem;
+ const char *d_str = def_val;
+
+ need_to_merge = e_str != d_str && l_str == d_str;
+ break;
+ }
+ default: {
+ /* Could be has field or case enum, the logic is
+ * equivalent, since 0 (FALSE) means not set for
+ * oneof */
+ need_to_merge = (*earlier_case_p != 0) &&
+ (*latter_case_p == 0);
+ break;
+ }
+ }
+
+ if (need_to_merge) {
+ size_t el_size =
+ sizeof_elt_in_repeated_array(field->type);
+ memcpy(latter_elem, earlier_elem, el_size);
+ /*
+ * Reset the element from the old message to 0
+ * to make sure earlier message deallocation
+ * doesn't corrupt zero-copied data in the new
+ * message, earlier message will be freed after
+ * this function is called anyway
+ */
+ memset(earlier_elem, 0, el_size);
+
+ if (field->quantifier_offset != 0) {
+ /* Set the has field or the case enum,
+ * if applicable */
+ *latter_case_p = *earlier_case_p;
+ *earlier_case_p = 0;
+ }
+ }
+ }
+ }
+ return TRUE;
+}
+
+/**
+ * Count packed elements.
+ *
+ * Given a raw slab of packed-repeated values, determine the number of
+ * elements. This function detects certain kinds of errors but not
+ * others; the remaining error checking is done by
+ * parse_packed_repeated_member().
+ */
+static protobuf_c_boolean
+count_packed_elements(ProtobufCType type,
+ size_t len, const uint8_t *data, size_t *count_out)
+{
+ switch (type) {
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ if (len % 4 != 0) {
+ PROTOBUF_C_UNPACK_ERROR("length must be a multiple of 4 for fixed-length 32-bit types");
+ return FALSE;
+ }
+ *count_out = len / 4;
+ return TRUE;
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ if (len % 8 != 0) {
+ PROTOBUF_C_UNPACK_ERROR("length must be a multiple of 8 for fixed-length 64-bit types");
+ return FALSE;
+ }
+ *count_out = len / 8;
+ return TRUE;
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32:
+ case PROTOBUF_C_TYPE_SINT32:
+ case PROTOBUF_C_TYPE_UINT32:
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_SINT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ *count_out = max_b128_numbers(len, data);
+ return TRUE;
+ case PROTOBUF_C_TYPE_BOOL:
+ *count_out = len;
+ return TRUE;
+ case PROTOBUF_C_TYPE_STRING:
+ case PROTOBUF_C_TYPE_BYTES:
+ case PROTOBUF_C_TYPE_MESSAGE:
+ default:
+ PROTOBUF_C_UNPACK_ERROR("bad protobuf-c type %u for packed-repeated", type);
+ return FALSE;
+ }
+}
+
+static inline uint32_t
+parse_uint32(unsigned len, const uint8_t *data)
+{
+ uint32_t rv = data[0] & 0x7f;
+ if (len > 1) {
+ rv |= ((uint32_t) (data[1] & 0x7f) << 7);
+ if (len > 2) {
+ rv |= ((uint32_t) (data[2] & 0x7f) << 14);
+ if (len > 3) {
+ rv |= ((uint32_t) (data[3] & 0x7f) << 21);
+ if (len > 4)
+ rv |= ((uint32_t) (data[4]) << 28);
+ }
+ }
+ }
+ return rv;
+}
+
+static inline uint32_t
+parse_int32(unsigned len, const uint8_t *data)
+{
+ return parse_uint32(len, data);
+}
+
+static inline int32_t
+unzigzag32(uint32_t v)
+{
+ // Note: Using unsigned types prevents undefined behavior
+ return (int32_t)((v >> 1) ^ -(v & 1));
+}
+
+static inline uint32_t
+parse_fixed_uint32(const uint8_t *data)
+{
+#if !defined(WORDS_BIGENDIAN)
+ uint32_t t;
+ memcpy(&t, data, 4);
+ return t;
+#else
+ return data[0] |
+ ((uint32_t) (data[1]) << 8) |
+ ((uint32_t) (data[2]) << 16) |
+ ((uint32_t) (data[3]) << 24);
+#endif
+}
+
+static uint64_t
+parse_uint64(unsigned len, const uint8_t *data)
+{
+ unsigned shift, i;
+ uint64_t rv;
+
+ if (len < 5)
+ return parse_uint32(len, data);
+ rv = ((uint64_t) (data[0] & 0x7f)) |
+ ((uint64_t) (data[1] & 0x7f) << 7) |
+ ((uint64_t) (data[2] & 0x7f) << 14) |
+ ((uint64_t) (data[3] & 0x7f) << 21);
+ shift = 28;
+ for (i = 4; i < len; i++) {
+ rv |= (((uint64_t) (data[i] & 0x7f)) << shift);
+ shift += 7;
+ }
+ return rv;
+}
+
+static inline int64_t
+unzigzag64(uint64_t v)
+{
+ // Note: Using unsigned types prevents undefined behavior
+ return (int64_t)((v >> 1) ^ -(v & 1));
+}
+
+static inline uint64_t
+parse_fixed_uint64(const uint8_t *data)
+{
+#if !defined(WORDS_BIGENDIAN)
+ uint64_t t;
+ memcpy(&t, data, 8);
+ return t;
+#else
+ return (uint64_t) parse_fixed_uint32(data) |
+ (((uint64_t) parse_fixed_uint32(data + 4)) << 32);
+#endif
+}
+
+static protobuf_c_boolean
+parse_boolean(unsigned len, const uint8_t *data)
+{
+ unsigned i;
+ for (i = 0; i < len; i++)
+ if (data[i] & 0x7f)
+ return TRUE;
+ return FALSE;
+}
+
+static protobuf_c_boolean
+parse_required_member(ScannedMember *scanned_member,
+ void *member,
+ ProtobufCAllocator *allocator,
+ protobuf_c_boolean maybe_clear)
+{
+ unsigned len = scanned_member->len;
+ const uint8_t *data = scanned_member->data;
+ uint8_t wire_type = scanned_member->wire_type;
+
+ switch (scanned_member->field->type) {
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32:
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_VARINT)
+ return FALSE;
+ *(int32_t *) member = parse_int32(len, data);
+ return TRUE;
+ case PROTOBUF_C_TYPE_UINT32:
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_VARINT)
+ return FALSE;
+ *(uint32_t *) member = parse_uint32(len, data);
+ return TRUE;
+ case PROTOBUF_C_TYPE_SINT32:
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_VARINT)
+ return FALSE;
+ *(int32_t *) member = unzigzag32(parse_uint32(len, data));
+ return TRUE;
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_32BIT)
+ return FALSE;
+ *(uint32_t *) member = parse_fixed_uint32(data);
+ return TRUE;
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_VARINT)
+ return FALSE;
+ *(uint64_t *) member = parse_uint64(len, data);
+ return TRUE;
+ case PROTOBUF_C_TYPE_SINT64:
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_VARINT)
+ return FALSE;
+ *(int64_t *) member = unzigzag64(parse_uint64(len, data));
+ return TRUE;
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_64BIT)
+ return FALSE;
+ *(uint64_t *) member = parse_fixed_uint64(data);
+ return TRUE;
+ case PROTOBUF_C_TYPE_BOOL:
+ *(protobuf_c_boolean *) member = parse_boolean(len, data);
+ return TRUE;
+ case PROTOBUF_C_TYPE_STRING: {
+ char **pstr = member;
+ unsigned pref_len = scanned_member->length_prefix_len;
+
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED)
+ return FALSE;
+
+ if (maybe_clear && *pstr != NULL) {
+ const char *def = scanned_member->field->default_value;
+ if (*pstr != NULL && *pstr != def)
+ do_free(allocator, *pstr);
+ }
+ *pstr = do_alloc(allocator, len - pref_len + 1);
+ if (*pstr == NULL)
+ return FALSE;
+ memcpy(*pstr, data + pref_len, len - pref_len);
+ (*pstr)[len - pref_len] = 0;
+ return TRUE;
+ }
+ case PROTOBUF_C_TYPE_BYTES: {
+ ProtobufCBinaryData *bd = member;
+ const ProtobufCBinaryData *def_bd;
+ unsigned pref_len = scanned_member->length_prefix_len;
+
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED)
+ return FALSE;
+
+ def_bd = scanned_member->field->default_value;
+ if (maybe_clear &&
+ bd->data != NULL &&
+ (def_bd == NULL || bd->data != def_bd->data))
+ {
+ do_free(allocator, bd->data);
+ }
+ if (len > pref_len) {
+ bd->data = do_alloc(allocator, len - pref_len);
+ if (bd->data == NULL)
+ return FALSE;
+ memcpy(bd->data, data + pref_len, len - pref_len);
+ } else {
+ bd->data = NULL;
+ }
+ bd->len = len - pref_len;
+ return TRUE;
+ }
+ case PROTOBUF_C_TYPE_MESSAGE: {
+ ProtobufCMessage **pmessage = member;
+ ProtobufCMessage *subm;
+ const ProtobufCMessage *def_mess;
+ protobuf_c_boolean merge_successful = TRUE;
+ unsigned pref_len = scanned_member->length_prefix_len;
+
+ if (wire_type != PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED)
+ return FALSE;
+
+ def_mess = scanned_member->field->default_value;
+ if (len >= pref_len)
+ subm = protobuf_c_message_unpack(scanned_member->field->descriptor,
+ allocator,
+ len - pref_len,
+ data + pref_len);
+ else
+ subm = NULL;
+
+ if (maybe_clear &&
+ *pmessage != NULL &&
+ *pmessage != def_mess)
+ {
+ if (subm != NULL)
+ merge_successful = merge_messages(*pmessage, subm, allocator);
+ /* Delete the previous message */
+ protobuf_c_message_free_unpacked(*pmessage, allocator);
+ }
+ *pmessage = subm;
+ if (subm == NULL || !merge_successful)
+ return FALSE;
+ return TRUE;
+ }
+ }
+ return FALSE;
+}
+
+static protobuf_c_boolean
+parse_oneof_member (ScannedMember *scanned_member,
+ void *member,
+ ProtobufCMessage *message,
+ ProtobufCAllocator *allocator)
+{
+ uint32_t *oneof_case = STRUCT_MEMBER_PTR(uint32_t, message,
+ scanned_member->field->quantifier_offset);
+
+ /* If we have already parsed a member of this oneof, free it. */
+ if (*oneof_case != 0) {
+ const ProtobufCFieldDescriptor *old_field;
+ size_t el_size;
+ /* lookup field */
+ int field_index =
+ int_range_lookup(message->descriptor->n_field_ranges,
+ message->descriptor->field_ranges,
+ *oneof_case);
+ if (field_index < 0)
+ return FALSE;
+ old_field = message->descriptor->fields + field_index;
+ el_size = sizeof_elt_in_repeated_array(old_field->type);
+
+ switch (old_field->type) {
+ case PROTOBUF_C_TYPE_STRING: {
+ char **pstr = member;
+ const char *def = old_field->default_value;
+ if (*pstr != NULL && *pstr != def)
+ do_free(allocator, *pstr);
+ break;
+ }
+ case PROTOBUF_C_TYPE_BYTES: {
+ ProtobufCBinaryData *bd = member;
+ const ProtobufCBinaryData *def_bd = old_field->default_value;
+ if (bd->data != NULL &&
+ (def_bd == NULL || bd->data != def_bd->data))
+ {
+ do_free(allocator, bd->data);
+ }
+ break;
+ }
+ case PROTOBUF_C_TYPE_MESSAGE: {
+ ProtobufCMessage **pmessage = member;
+ const ProtobufCMessage *def_mess = old_field->default_value;
+ if (*pmessage != NULL && *pmessage != def_mess)
+ protobuf_c_message_free_unpacked(*pmessage, allocator);
+ break;
+ }
+ default:
+ break;
+ }
+
+ memset (member, 0, el_size);
+ }
+ if (!parse_required_member (scanned_member, member, allocator, TRUE))
+ return FALSE;
+
+ *oneof_case = scanned_member->tag;
+ return TRUE;
+}
+
+
+static protobuf_c_boolean
+parse_optional_member(ScannedMember *scanned_member,
+ void *member,
+ ProtobufCMessage *message,
+ ProtobufCAllocator *allocator)
+{
+ if (!parse_required_member(scanned_member, member, allocator, TRUE))
+ return FALSE;
+ if (scanned_member->field->quantifier_offset != 0)
+ STRUCT_MEMBER(protobuf_c_boolean,
+ message,
+ scanned_member->field->quantifier_offset) = TRUE;
+ return TRUE;
+}
+
+static protobuf_c_boolean
+parse_repeated_member(ScannedMember *scanned_member,
+ void *member,
+ ProtobufCMessage *message,
+ ProtobufCAllocator *allocator)
+{
+ const ProtobufCFieldDescriptor *field = scanned_member->field;
+ size_t *p_n = STRUCT_MEMBER_PTR(size_t, message, field->quantifier_offset);
+ size_t siz = sizeof_elt_in_repeated_array(field->type);
+ char *array = *(char **) member;
+
+ if (!parse_required_member(scanned_member, array + siz * (*p_n),
+ allocator, FALSE))
+ {
+ return FALSE;
+ }
+ *p_n += 1;
+ return TRUE;
+}
+
+static unsigned
+scan_varint(unsigned len, const uint8_t *data)
+{
+ unsigned i;
+ if (len > 10)
+ len = 10;
+ for (i = 0; i < len; i++)
+ if ((data[i] & 0x80) == 0)
+ break;
+ if (i == len)
+ return 0;
+ return i + 1;
+}
+
+static protobuf_c_boolean
+parse_packed_repeated_member(ScannedMember *scanned_member,
+ void *member,
+ ProtobufCMessage *message)
+{
+ const ProtobufCFieldDescriptor *field = scanned_member->field;
+ size_t *p_n = STRUCT_MEMBER_PTR(size_t, message, field->quantifier_offset);
+ size_t siz = sizeof_elt_in_repeated_array(field->type);
+ void *array = *(char **) member + siz * (*p_n);
+ const uint8_t *at = scanned_member->data + scanned_member->length_prefix_len;
+ size_t rem = scanned_member->len - scanned_member->length_prefix_len;
+ size_t count = 0;
+#if defined(WORDS_BIGENDIAN)
+ unsigned i;
+#endif
+
+ switch (field->type) {
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ count = (scanned_member->len - scanned_member->length_prefix_len) / 4;
+#if !defined(WORDS_BIGENDIAN)
+ goto no_unpacking_needed;
+#else
+ for (i = 0; i < count; i++) {
+ ((uint32_t *) array)[i] = parse_fixed_uint32(at);
+ at += 4;
+ }
+ break;
+#endif
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ count = (scanned_member->len - scanned_member->length_prefix_len) / 8;
+#if !defined(WORDS_BIGENDIAN)
+ goto no_unpacking_needed;
+#else
+ for (i = 0; i < count; i++) {
+ ((uint64_t *) array)[i] = parse_fixed_uint64(at);
+ at += 8;
+ }
+ break;
+#endif
+ case PROTOBUF_C_TYPE_ENUM:
+ case PROTOBUF_C_TYPE_INT32:
+ while (rem > 0) {
+ unsigned s = scan_varint(rem, at);
+ if (s == 0) {
+ PROTOBUF_C_UNPACK_ERROR("bad packed-repeated int32 value");
+ return FALSE;
+ }
+ ((int32_t *) array)[count++] = parse_int32(s, at);
+ at += s;
+ rem -= s;
+ }
+ break;
+ case PROTOBUF_C_TYPE_SINT32:
+ while (rem > 0) {
+ unsigned s = scan_varint(rem, at);
+ if (s == 0) {
+ PROTOBUF_C_UNPACK_ERROR("bad packed-repeated sint32 value");
+ return FALSE;
+ }
+ ((int32_t *) array)[count++] = unzigzag32(parse_uint32(s, at));
+ at += s;
+ rem -= s;
+ }
+ break;
+ case PROTOBUF_C_TYPE_UINT32:
+ while (rem > 0) {
+ unsigned s = scan_varint(rem, at);
+ if (s == 0) {
+ PROTOBUF_C_UNPACK_ERROR("bad packed-repeated enum or uint32 value");
+ return FALSE;
+ }
+ ((uint32_t *) array)[count++] = parse_uint32(s, at);
+ at += s;
+ rem -= s;
+ }
+ break;
+
+ case PROTOBUF_C_TYPE_SINT64:
+ while (rem > 0) {
+ unsigned s = scan_varint(rem, at);
+ if (s == 0) {
+ PROTOBUF_C_UNPACK_ERROR("bad packed-repeated sint64 value");
+ return FALSE;
+ }
+ ((int64_t *) array)[count++] = unzigzag64(parse_uint64(s, at));
+ at += s;
+ rem -= s;
+ }
+ break;
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_UINT64:
+ while (rem > 0) {
+ unsigned s = scan_varint(rem, at);
+ if (s == 0) {
+ PROTOBUF_C_UNPACK_ERROR("bad packed-repeated int64/uint64 value");
+ return FALSE;
+ }
+ ((int64_t *) array)[count++] = parse_uint64(s, at);
+ at += s;
+ rem -= s;
+ }
+ break;
+ case PROTOBUF_C_TYPE_BOOL:
+ while (rem > 0) {
+ unsigned s = scan_varint(rem, at);
+ if (s == 0) {
+ PROTOBUF_C_UNPACK_ERROR("bad packed-repeated boolean value");
+ return FALSE;
+ }
+ ((protobuf_c_boolean *) array)[count++] = parse_boolean(s, at);
+ at += s;
+ rem -= s;
+ }
+ break;
+ default:
+ PROTOBUF_C__ASSERT_NOT_REACHED();
+ }
+ *p_n += count;
+ return TRUE;
+
+#if !defined(WORDS_BIGENDIAN)
+no_unpacking_needed:
+ memcpy(array, at, count * siz);
+ *p_n += count;
+ return TRUE;
+#endif
+}
+
+static protobuf_c_boolean
+is_packable_type(ProtobufCType type)
+{
+ return
+ type != PROTOBUF_C_TYPE_STRING &&
+ type != PROTOBUF_C_TYPE_BYTES &&
+ type != PROTOBUF_C_TYPE_MESSAGE;
+}
+
+static protobuf_c_boolean
+parse_member(ScannedMember *scanned_member,
+ ProtobufCMessage *message,
+ ProtobufCAllocator *allocator)
+{
+ const ProtobufCFieldDescriptor *field = scanned_member->field;
+ void *member;
+
+ if (field == NULL) {
+ ProtobufCMessageUnknownField *ufield =
+ message->unknown_fields +
+ (message->n_unknown_fields++);
+ ufield->tag = scanned_member->tag;
+ ufield->wire_type = scanned_member->wire_type;
+ ufield->len = scanned_member->len;
+ ufield->data = do_alloc(allocator, scanned_member->len);
+ if (ufield->data == NULL)
+ return FALSE;
+ memcpy(ufield->data, scanned_member->data, ufield->len);
+ return TRUE;
+ }
+ member = (char *) message + field->offset;
+ switch (field->label) {
+ case PROTOBUF_C_LABEL_REQUIRED:
+ return parse_required_member(scanned_member, member,
+ allocator, TRUE);
+ case PROTOBUF_C_LABEL_OPTIONAL:
+ case PROTOBUF_C_LABEL_NONE:
+ if (0 != (field->flags & PROTOBUF_C_FIELD_FLAG_ONEOF)) {
+ return parse_oneof_member(scanned_member, member,
+ message, allocator);
+ } else {
+ return parse_optional_member(scanned_member, member,
+ message, allocator);
+ }
+ case PROTOBUF_C_LABEL_REPEATED:
+ if (scanned_member->wire_type ==
+ PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED &&
+ (0 != (field->flags & PROTOBUF_C_FIELD_FLAG_PACKED) ||
+ is_packable_type(field->type)))
+ {
+ return parse_packed_repeated_member(scanned_member,
+ member, message);
+ } else {
+ return parse_repeated_member(scanned_member,
+ member, message,
+ allocator);
+ }
+ }
+ PROTOBUF_C__ASSERT_NOT_REACHED();
+ return 0;
+}
+
+/**
+ * Initialise messages generated by old code.
+ *
+ * This function is used if desc->message_init == NULL (which occurs
+ * for old code, and which would be useful to support allocating
+ * descriptors dynamically).
+ */
+static void
+message_init_generic(const ProtobufCMessageDescriptor *desc,
+ ProtobufCMessage *message)
+{
+ unsigned i;
+
+ memset(message, 0, desc->sizeof_message);
+ message->descriptor = desc;
+ for (i = 0; i < desc->n_fields; i++) {
+ if (desc->fields[i].default_value != NULL &&
+ desc->fields[i].label != PROTOBUF_C_LABEL_REPEATED)
+ {
+ void *field =
+ STRUCT_MEMBER_P(message, desc->fields[i].offset);
+ const void *dv = desc->fields[i].default_value;
+
+ switch (desc->fields[i].type) {
+ case PROTOBUF_C_TYPE_INT32:
+ case PROTOBUF_C_TYPE_SINT32:
+ case PROTOBUF_C_TYPE_SFIXED32:
+ case PROTOBUF_C_TYPE_UINT32:
+ case PROTOBUF_C_TYPE_FIXED32:
+ case PROTOBUF_C_TYPE_FLOAT:
+ case PROTOBUF_C_TYPE_ENUM:
+ memcpy(field, dv, 4);
+ break;
+ case PROTOBUF_C_TYPE_INT64:
+ case PROTOBUF_C_TYPE_SINT64:
+ case PROTOBUF_C_TYPE_SFIXED64:
+ case PROTOBUF_C_TYPE_UINT64:
+ case PROTOBUF_C_TYPE_FIXED64:
+ case PROTOBUF_C_TYPE_DOUBLE:
+ memcpy(field, dv, 8);
+ break;
+ case PROTOBUF_C_TYPE_BOOL:
+ memcpy(field, dv, sizeof(protobuf_c_boolean));
+ break;
+ case PROTOBUF_C_TYPE_BYTES:
+ memcpy(field, dv, sizeof(ProtobufCBinaryData));
+ break;
+
+ case PROTOBUF_C_TYPE_STRING:
+ case PROTOBUF_C_TYPE_MESSAGE:
+ /*
+ * The next line essentially implements a cast
+ * from const, which is totally unavoidable.
+ */
+ *(const void **) field = dv;
+ break;
+ }
+ }
+ }
+}
+
+/**@}*/
+
+/*
+ * ScannedMember slabs (an unpacking implementation detail). Before doing real
+ * unpacking, we first scan through the elements to see how many there are (for
+ * repeated fields), and which field to use (for non-repeated fields given
+ * twice).
+ *
+ * In order to avoid allocations for small messages, we keep a stack-allocated
+ * slab of ScannedMembers of size FIRST_SCANNED_MEMBER_SLAB_SIZE (16). After we
+ * fill that up, we allocate each slab twice as large as the previous one.
+ */
+#define FIRST_SCANNED_MEMBER_SLAB_SIZE_LOG2 4
+
+/*
+ * The number of slabs, including the stack-allocated ones; choose the number so
+ * that we would overflow if we needed a slab larger than provided.
+ */
+#define MAX_SCANNED_MEMBER_SLAB \
+ (sizeof(unsigned int)*8 - 1 \
+ - BOUND_SIZEOF_SCANNED_MEMBER_LOG2 \
+ - FIRST_SCANNED_MEMBER_SLAB_SIZE_LOG2)
+
+#define REQUIRED_FIELD_BITMAP_SET(index) \
+ (required_fields_bitmap[(index)/8] |= (1UL<<((index)%8)))
+
+#define REQUIRED_FIELD_BITMAP_IS_SET(index) \
+ (required_fields_bitmap[(index)/8] & (1UL<<((index)%8)))
+
+ProtobufCMessage *
+protobuf_c_message_unpack(const ProtobufCMessageDescriptor *desc,
+ ProtobufCAllocator *allocator,
+ size_t len, const uint8_t *data)
+{
+ ProtobufCMessage *rv;
+ size_t rem = len;
+ const uint8_t *at = data;
+ const ProtobufCFieldDescriptor *last_field = desc->fields + 0;
+ ScannedMember first_member_slab[1UL <<
+ FIRST_SCANNED_MEMBER_SLAB_SIZE_LOG2];
+
+ /*
+ * scanned_member_slabs[i] is an array of arrays of ScannedMember.
+ * The first slab (scanned_member_slabs[0] is just a pointer to
+ * first_member_slab), above. All subsequent slabs will be allocated
+ * using the allocator.
+ */
+ ScannedMember *scanned_member_slabs[MAX_SCANNED_MEMBER_SLAB + 1];
+ unsigned which_slab = 0; /* the slab we are currently populating */
+ unsigned in_slab_index = 0; /* number of members in the slab */
+ size_t n_unknown = 0;
+ unsigned f;
+ unsigned j;
+ unsigned i_slab;
+ unsigned last_field_index = 0;
+ unsigned required_fields_bitmap_len;
+ unsigned char required_fields_bitmap_stack[16];
+ unsigned char *required_fields_bitmap = required_fields_bitmap_stack;
+ protobuf_c_boolean required_fields_bitmap_alloced = FALSE;
+
+ ASSERT_IS_MESSAGE_DESCRIPTOR(desc);
+
+ if (allocator == NULL)
+ allocator = &protobuf_c__allocator;
+
+ rv = do_alloc(allocator, desc->sizeof_message);
+ if (!rv)
+ return (NULL);
+ scanned_member_slabs[0] = first_member_slab;
+
+ required_fields_bitmap_len = (desc->n_fields + 7) / 8;
+ if (required_fields_bitmap_len > sizeof(required_fields_bitmap_stack)) {
+ required_fields_bitmap = do_alloc(allocator, required_fields_bitmap_len);
+ if (!required_fields_bitmap) {
+ do_free(allocator, rv);
+ return (NULL);
+ }
+ required_fields_bitmap_alloced = TRUE;
+ }
+ memset(required_fields_bitmap, 0, required_fields_bitmap_len);
+
+ /*
+ * Generated code always defines "message_init". However, we provide a
+ * fallback for (1) users of old protobuf-c generated-code that do not
+ * provide the function, and (2) descriptors constructed from some other
+ * source (most likely, direct construction from the .proto file).
+ */
+ if (desc->message_init != NULL)
+ protobuf_c_message_init(desc, rv);
+ else
+ message_init_generic(desc, rv);
+
+ while (rem > 0) {
+ uint32_t tag;
+ uint8_t wire_type;
+ size_t used = parse_tag_and_wiretype(rem, at, &tag, &wire_type);
+ const ProtobufCFieldDescriptor *field;
+ ScannedMember tmp;
+
+ if (used == 0) {
+ PROTOBUF_C_UNPACK_ERROR("error parsing tag/wiretype at offset %u",
+ (unsigned) (at - data));
+ goto error_cleanup_during_scan;
+ }
+ /*
+ * \todo Consider optimizing for field[1].id == tag, if field[1]
+ * exists!
+ */
+ if (last_field == NULL || last_field->id != tag) {
+ /* lookup field */
+ int field_index =
+ int_range_lookup(desc->n_field_ranges,
+ desc->field_ranges,
+ tag);
+ if (field_index < 0) {
+ field = NULL;
+ n_unknown++;
+ } else {
+ field = desc->fields + field_index;
+ last_field = field;
+ last_field_index = field_index;
+ }
+ } else {
+ field = last_field;
+ }
+
+ if (field != NULL && field->label == PROTOBUF_C_LABEL_REQUIRED)
+ REQUIRED_FIELD_BITMAP_SET(last_field_index);
+
+ at += used;
+ rem -= used;
+ tmp.tag = tag;
+ tmp.wire_type = wire_type;
+ tmp.field = field;
+ tmp.data = at;
+ tmp.length_prefix_len = 0;
+
+ switch (wire_type) {
+ case PROTOBUF_C_WIRE_TYPE_VARINT: {
+ unsigned max_len = rem < 10 ? rem : 10;
+ unsigned i;
+
+ for (i = 0; i < max_len; i++)
+ if ((at[i] & 0x80) == 0)
+ break;
+ if (i == max_len) {
+ PROTOBUF_C_UNPACK_ERROR("unterminated varint at offset %u",
+ (unsigned) (at - data));
+ goto error_cleanup_during_scan;
+ }
+ tmp.len = i + 1;
+ break;
+ }
+ case PROTOBUF_C_WIRE_TYPE_64BIT:
+ if (rem < 8) {
+ PROTOBUF_C_UNPACK_ERROR("too short after 64bit wiretype at offset %u",
+ (unsigned) (at - data));
+ goto error_cleanup_during_scan;
+ }
+ tmp.len = 8;
+ break;
+ case PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED: {
+ size_t pref_len;
+
+ tmp.len = scan_length_prefixed_data(rem, at, &pref_len);
+ if (tmp.len == 0) {
+ /* NOTE: scan_length_prefixed_data calls UNPACK_ERROR */
+ goto error_cleanup_during_scan;
+ }
+ tmp.length_prefix_len = pref_len;
+ break;
+ }
+ case PROTOBUF_C_WIRE_TYPE_32BIT:
+ if (rem < 4) {
+ PROTOBUF_C_UNPACK_ERROR("too short after 32bit wiretype at offset %u",
+ (unsigned) (at - data));
+ goto error_cleanup_during_scan;
+ }
+ tmp.len = 4;
+ break;
+ default:
+ PROTOBUF_C_UNPACK_ERROR("unsupported tag %u at offset %u",
+ wire_type, (unsigned) (at - data));
+ goto error_cleanup_during_scan;
+ }
+
+ if (in_slab_index == (1UL <<
+ (which_slab + FIRST_SCANNED_MEMBER_SLAB_SIZE_LOG2)))
+ {
+ size_t size;
+
+ in_slab_index = 0;
+ if (which_slab == MAX_SCANNED_MEMBER_SLAB) {
+ PROTOBUF_C_UNPACK_ERROR("too many fields");
+ goto error_cleanup_during_scan;
+ }
+ which_slab++;
+ size = sizeof(ScannedMember)
+ << (which_slab + FIRST_SCANNED_MEMBER_SLAB_SIZE_LOG2);
+ scanned_member_slabs[which_slab] = do_alloc(allocator, size);
+ if (scanned_member_slabs[which_slab] == NULL)
+ goto error_cleanup_during_scan;
+ }
+ scanned_member_slabs[which_slab][in_slab_index++] = tmp;
+
+ if (field != NULL && field->label == PROTOBUF_C_LABEL_REPEATED) {
+ size_t *n = STRUCT_MEMBER_PTR(size_t, rv,
+ field->quantifier_offset);
+ if (wire_type == PROTOBUF_C_WIRE_TYPE_LENGTH_PREFIXED &&
+ (0 != (field->flags & PROTOBUF_C_FIELD_FLAG_PACKED) ||
+ is_packable_type(field->type)))
+ {
+ size_t count;
+ if (!count_packed_elements(field->type,
+ tmp.len -
+ tmp.length_prefix_len,
+ tmp.data +
+ tmp.length_prefix_len,
+ &count))
+ {
+ PROTOBUF_C_UNPACK_ERROR("counting packed elements");
+ goto error_cleanup_during_scan;
+ }
+ *n += count;
+ } else {
+ *n += 1;
+ }
+ }
+
+ at += tmp.len;
+ rem -= tmp.len;
+ }
+
+ /* allocate space for repeated fields, also check that all required fields have been set */
+ for (f = 0; f < desc->n_fields; f++) {
+ const ProtobufCFieldDescriptor *field = desc->fields + f;
+ if (field == NULL) {
+ continue;
+ }
+ if (field->label == PROTOBUF_C_LABEL_REPEATED) {
+ size_t siz =
+ sizeof_elt_in_repeated_array(field->type);
+ size_t *n_ptr =
+ STRUCT_MEMBER_PTR(size_t, rv,
+ field->quantifier_offset);
+ if (*n_ptr != 0) {
+ unsigned n = *n_ptr;
+ void *a;
+ *n_ptr = 0;
+ assert(rv->descriptor != NULL);
+#define CLEAR_REMAINING_N_PTRS() \
+ for(f++;f < desc->n_fields; f++) \
+ { \
+ field = desc->fields + f; \
+ if (field->label == PROTOBUF_C_LABEL_REPEATED) \
+ STRUCT_MEMBER (size_t, rv, field->quantifier_offset) = 0; \
+ }
+ a = do_alloc(allocator, siz * n);
+ if (!a) {
+ CLEAR_REMAINING_N_PTRS();
+ goto error_cleanup;
+ }
+ STRUCT_MEMBER(void *, rv, field->offset) = a;
+ }
+ } else if (field->label == PROTOBUF_C_LABEL_REQUIRED) {
+ if (field->default_value == NULL &&
+ !REQUIRED_FIELD_BITMAP_IS_SET(f))
+ {
+ CLEAR_REMAINING_N_PTRS();
+ PROTOBUF_C_UNPACK_ERROR("message '%s': missing required field '%s'",
+ desc->name, field->name);
+ goto error_cleanup;
+ }
+ }
+ }
+#undef CLEAR_REMAINING_N_PTRS
+
+ /* allocate space for unknown fields */
+ if (n_unknown) {
+ rv->unknown_fields = do_alloc(allocator,
+ n_unknown * sizeof(ProtobufCMessageUnknownField));
+ if (rv->unknown_fields == NULL)
+ goto error_cleanup;
+ }
+
+ /* do real parsing */
+ for (i_slab = 0; i_slab <= which_slab; i_slab++) {
+ unsigned max = (i_slab == which_slab) ?
+ in_slab_index : (1UL << (i_slab + 4));
+ ScannedMember *slab = scanned_member_slabs[i_slab];
+
+ for (j = 0; j < max; j++) {
+ if (!parse_member(slab + j, rv, allocator)) {
+ PROTOBUF_C_UNPACK_ERROR("error parsing member %s of %s",
+ slab->field ? slab->field->name : "*unknown-field*",
+ desc->name);
+ goto error_cleanup;
+ }
+ }
+ }
+
+ /* cleanup */
+ for (j = 1; j <= which_slab; j++)
+ do_free(allocator, scanned_member_slabs[j]);
+ if (required_fields_bitmap_alloced)
+ do_free(allocator, required_fields_bitmap);
+ return rv;
+
+error_cleanup:
+ protobuf_c_message_free_unpacked(rv, allocator);
+ for (j = 1; j <= which_slab; j++)
+ do_free(allocator, scanned_member_slabs[j]);
+ if (required_fields_bitmap_alloced)
+ do_free(allocator, required_fields_bitmap);
+ return NULL;
+
+error_cleanup_during_scan:
+ do_free(allocator, rv);
+ for (j = 1; j <= which_slab; j++)
+ do_free(allocator, scanned_member_slabs[j]);
+ if (required_fields_bitmap_alloced)
+ do_free(allocator, required_fields_bitmap);
+ return NULL;
+}
+
+void
+protobuf_c_message_free_unpacked(ProtobufCMessage *message,
+ ProtobufCAllocator *allocator)
+{
+ const ProtobufCMessageDescriptor *desc;
+ unsigned f;
+
+ if (message == NULL)
+ return;
+
+ desc = message->descriptor;
+
+ ASSERT_IS_MESSAGE(message);
+
+ if (allocator == NULL)
+ allocator = &protobuf_c__allocator;
+ message->descriptor = NULL;
+ for (f = 0; f < desc->n_fields; f++) {
+ if (0 != (desc->fields[f].flags & PROTOBUF_C_FIELD_FLAG_ONEOF) &&
+ desc->fields[f].id !=
+ STRUCT_MEMBER(uint32_t, message, desc->fields[f].quantifier_offset))
+ {
+ /* This is not the selected oneof, skip it */
+ continue;
+ }
+
+ if (desc->fields[f].label == PROTOBUF_C_LABEL_REPEATED) {
+ size_t n = STRUCT_MEMBER(size_t,
+ message,
+ desc->fields[f].quantifier_offset);
+ void *arr = STRUCT_MEMBER(void *,
+ message,
+ desc->fields[f].offset);
+
+ if (arr != NULL) {
+ if (desc->fields[f].type == PROTOBUF_C_TYPE_STRING) {
+ unsigned i;
+ for (i = 0; i < n; i++)
+ do_free(allocator, ((char **) arr)[i]);
+ } else if (desc->fields[f].type == PROTOBUF_C_TYPE_BYTES) {
+ unsigned i;
+ for (i = 0; i < n; i++)
+ do_free(allocator, ((ProtobufCBinaryData *) arr)[i].data);
+ } else if (desc->fields[f].type == PROTOBUF_C_TYPE_MESSAGE) {
+ unsigned i;
+ for (i = 0; i < n; i++)
+ protobuf_c_message_free_unpacked(
+ ((ProtobufCMessage **) arr)[i],
+ allocator
+ );
+ }
+ do_free(allocator, arr);
+ }
+ } else if (desc->fields[f].type == PROTOBUF_C_TYPE_STRING) {
+ char *str = STRUCT_MEMBER(char *, message,
+ desc->fields[f].offset);
+
+ if (str && str != desc->fields[f].default_value)
+ do_free(allocator, str);
+ } else if (desc->fields[f].type == PROTOBUF_C_TYPE_BYTES) {
+ void *data = STRUCT_MEMBER(ProtobufCBinaryData, message,
+ desc->fields[f].offset).data;
+ const ProtobufCBinaryData *default_bd;
+
+ default_bd = desc->fields[f].default_value;
+ if (data != NULL &&
+ (default_bd == NULL ||
+ default_bd->data != data))
+ {
+ do_free(allocator, data);
+ }
+ } else if (desc->fields[f].type == PROTOBUF_C_TYPE_MESSAGE) {
+ ProtobufCMessage *sm;
+
+ sm = STRUCT_MEMBER(ProtobufCMessage *, message,
+ desc->fields[f].offset);
+ if (sm && sm != desc->fields[f].default_value)
+ protobuf_c_message_free_unpacked(sm, allocator);
+ }
+ }
+
+ for (f = 0; f < message->n_unknown_fields; f++)
+ do_free(allocator, message->unknown_fields[f].data);
+ if (message->unknown_fields != NULL)
+ do_free(allocator, message->unknown_fields);
+
+ do_free(allocator, message);
+}
+
+void
+protobuf_c_message_init(const ProtobufCMessageDescriptor * descriptor,
+ void *message)
+{
+ descriptor->message_init((ProtobufCMessage *) (message));
+}
+
+protobuf_c_boolean
+protobuf_c_message_check(const ProtobufCMessage *message)
+{
+ unsigned i;
+
+ if (!message ||
+ !message->descriptor ||
+ message->descriptor->magic != PROTOBUF_C__MESSAGE_DESCRIPTOR_MAGIC)
+ {
+ return FALSE;
+ }
+
+ for (i = 0; i < message->descriptor->n_fields; i++) {
+ const ProtobufCFieldDescriptor *f = message->descriptor->fields + i;
+ ProtobufCType type = f->type;
+ ProtobufCLabel label = f->label;
+ void *field = STRUCT_MEMBER_P (message, f->offset);
+
+ if (f->flags & PROTOBUF_C_FIELD_FLAG_ONEOF) {
+ const uint32_t *oneof_case = STRUCT_MEMBER_P (message, f->quantifier_offset);
+ if (f->id != *oneof_case) {
+ continue; //Do not check if it is an unpopulated oneof member.
+ }
+ }
+
+ if (label == PROTOBUF_C_LABEL_REPEATED) {
+ size_t *quantity = STRUCT_MEMBER_P (message, f->quantifier_offset);
+
+ if (*quantity > 0 && *(void **) field == NULL) {
+ return FALSE;
+ }
+
+ if (type == PROTOBUF_C_TYPE_MESSAGE) {
+ ProtobufCMessage **submessage = *(ProtobufCMessage ***) field;
+ unsigned j;
+ for (j = 0; j < *quantity; j++) {
+ if (!protobuf_c_message_check(submessage[j]))
+ return FALSE;
+ }
+ } else if (type == PROTOBUF_C_TYPE_STRING) {
+ char **string = *(char ***) field;
+ unsigned j;
+ for (j = 0; j < *quantity; j++) {
+ if (!string[j])
+ return FALSE;
+ }
+ } else if (type == PROTOBUF_C_TYPE_BYTES) {
+ ProtobufCBinaryData *bd = *(ProtobufCBinaryData **) field;
+ unsigned j;
+ for (j = 0; j < *quantity; j++) {
+ if (bd[j].len > 0 && bd[j].data == NULL)
+ return FALSE;
+ }
+ }
+
+ } else { /* PROTOBUF_C_LABEL_REQUIRED or PROTOBUF_C_LABEL_OPTIONAL */
+
+ if (type == PROTOBUF_C_TYPE_MESSAGE) {
+ ProtobufCMessage *submessage = *(ProtobufCMessage **) field;
+ if (label == PROTOBUF_C_LABEL_REQUIRED || submessage != NULL) {
+ if (!protobuf_c_message_check(submessage))
+ return FALSE;
+ }
+ } else if (type == PROTOBUF_C_TYPE_STRING) {
+ char *string = *(char **) field;
+ if (label == PROTOBUF_C_LABEL_REQUIRED && string == NULL)
+ return FALSE;
+ } else if (type == PROTOBUF_C_TYPE_BYTES) {
+ protobuf_c_boolean *has = STRUCT_MEMBER_P (message, f->quantifier_offset);
+ ProtobufCBinaryData *bd = field;
+ if (label == PROTOBUF_C_LABEL_REQUIRED || *has == TRUE) {
+ if (bd->len > 0 && bd->data == NULL)
+ return FALSE;
+ }
+ }
+ }
+ }
+
+ return TRUE;
+}
+
+/* === services === */
+
+typedef void (*GenericHandler) (void *service,
+ const ProtobufCMessage *input,
+ ProtobufCClosure closure,
+ void *closure_data);
+void
+protobuf_c_service_invoke_internal(ProtobufCService *service,
+ unsigned method_index,
+ const ProtobufCMessage *input,
+ ProtobufCClosure closure,
+ void *closure_data)
+{
+ GenericHandler *handlers;
+ GenericHandler handler;
+
+ /*
+ * Verify that method_index is within range. If this fails, you are
+ * likely invoking a newly added method on an old service. (Although
+ * other memory corruption bugs can cause this assertion too.)
+ */
+ assert(method_index < service->descriptor->n_methods);
+
+ /*
+ * Get the array of virtual methods (which are enumerated by the
+ * generated code).
+ */
+ handlers = (GenericHandler *) (service + 1);
+
+ /*
+ * Get our method and invoke it.
+ * \todo Seems like handler == NULL is a situation that needs handling.
+ */
+ handler = handlers[method_index];
+ (*handler)(service, input, closure, closure_data);
+}
+
+void
+protobuf_c_service_generated_init(ProtobufCService *service,
+ const ProtobufCServiceDescriptor *descriptor,
+ ProtobufCServiceDestroy destroy)
+{
+ ASSERT_IS_SERVICE_DESCRIPTOR(descriptor);
+ service->descriptor = descriptor;
+ service->destroy = destroy;
+ service->invoke = protobuf_c_service_invoke_internal;
+ memset(&service[1], 0, descriptor->n_methods * sizeof(GenericHandler));
+}
+
+void protobuf_c_service_destroy(ProtobufCService *service)
+{
+ service->destroy(service);
+}
+
+/* --- querying the descriptors --- */
+
+const ProtobufCEnumValue *
+protobuf_c_enum_descriptor_get_value_by_name(const ProtobufCEnumDescriptor *desc,
+ const char *name)
+{
+ unsigned start = 0;
+ unsigned count;
+
+ if (desc == NULL || desc->values_by_name == NULL)
+ return NULL;
+
+ count = desc->n_value_names;
+
+ while (count > 1) {
+ unsigned mid = start + count / 2;
+ int rv = strcmp(desc->values_by_name[mid].name, name);
+ if (rv == 0)
+ return desc->values + desc->values_by_name[mid].index;
+ else if (rv < 0) {
+ count = start + count - (mid + 1);
+ start = mid + 1;
+ } else
+ count = mid - start;
+ }
+ if (count == 0)
+ return NULL;
+ if (strcmp(desc->values_by_name[start].name, name) == 0)
+ return desc->values + desc->values_by_name[start].index;
+ return NULL;
+}
+
+const ProtobufCEnumValue *
+protobuf_c_enum_descriptor_get_value(const ProtobufCEnumDescriptor *desc,
+ int value)
+{
+ int rv = int_range_lookup(desc->n_value_ranges, desc->value_ranges, value);
+ if (rv < 0)
+ return NULL;
+ return desc->values + rv;
+}
+
+const ProtobufCFieldDescriptor *
+protobuf_c_message_descriptor_get_field_by_name(const ProtobufCMessageDescriptor *desc,
+ const char *name)
+{
+ unsigned start = 0;
+ unsigned count;
+ const ProtobufCFieldDescriptor *field;
+
+ if (desc == NULL || desc->fields_sorted_by_name == NULL)
+ return NULL;
+
+ count = desc->n_fields;
+
+ while (count > 1) {
+ unsigned mid = start + count / 2;
+ int rv;
+ field = desc->fields + desc->fields_sorted_by_name[mid];
+ rv = strcmp(field->name, name);
+ if (rv == 0)
+ return field;
+ else if (rv < 0) {
+ count = start + count - (mid + 1);
+ start = mid + 1;
+ } else
+ count = mid - start;
+ }
+ if (count == 0)
+ return NULL;
+ field = desc->fields + desc->fields_sorted_by_name[start];
+ if (strcmp(field->name, name) == 0)
+ return field;
+ return NULL;
+}
+
+const ProtobufCFieldDescriptor *
+protobuf_c_message_descriptor_get_field(const ProtobufCMessageDescriptor *desc,
+ unsigned value)
+{
+ int rv = int_range_lookup(desc->n_field_ranges,desc->field_ranges, value);
+ if (rv < 0)
+ return NULL;
+ return desc->fields + rv;
+}
+
+const ProtobufCMethodDescriptor *
+protobuf_c_service_descriptor_get_method_by_name(const ProtobufCServiceDescriptor *desc,
+ const char *name)
+{
+ unsigned start = 0;
+ unsigned count;
+
+ if (desc == NULL || desc->method_indices_by_name == NULL)
+ return NULL;
+
+ count = desc->n_methods;
+
+ while (count > 1) {
+ unsigned mid = start + count / 2;
+ unsigned mid_index = desc->method_indices_by_name[mid];
+ const char *mid_name = desc->methods[mid_index].name;
+ int rv = strcmp(mid_name, name);
+
+ if (rv == 0)
+ return desc->methods + desc->method_indices_by_name[mid];
+ if (rv < 0) {
+ count = start + count - (mid + 1);
+ start = mid + 1;
+ } else {
+ count = mid - start;
+ }
+ }
+ if (count == 0)
+ return NULL;
+ if (strcmp(desc->methods[desc->method_indices_by_name[start]].name, name) == 0)
+ return desc->methods + desc->method_indices_by_name[start];
+ return NULL;
+}