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/* Common parts of the nanopb library. Most of these are quite low-level* stuff. For the high-level interface, see pb_encode.h and pb_decode.h.*/#ifndef PB_H_INCLUDED#define PB_H_INCLUDED/****************************************************************** Nanopb compilation time options. You can change these here by ** uncommenting the lines, or on the compiler command line. ******************************************************************//* Enable support for dynamically allocated fields *//* #define PB_ENABLE_MALLOC 1 *//* Define this if your CPU / compiler combination does not support* unaligned memory access to packed structures. *//* #define PB_NO_PACKED_STRUCTS 1 *//* Increase the number of required fields that are tracked.* A compiler warning will tell if you need this. *//* #define PB_MAX_REQUIRED_FIELDS 256 *//* Add support for tag numbers > 255 and fields larger than 255 bytes. *//* #define PB_FIELD_16BIT 1 *//* Add support for tag numbers > 65536 and fields larger than 65536 bytes. *//* #define PB_FIELD_32BIT 1 *//* Disable support for error messages in order to save some code space. *//* #define PB_NO_ERRMSG 1 *//* Disable support for custom streams (support only memory buffers). *//* #define PB_BUFFER_ONLY 1 *//* Switch back to the old-style callback function signature.* This was the default until nanopb-0.2.1. *//* #define PB_OLD_CALLBACK_STYLE *//* Don't encode scalar arrays as packed. This is only to be used when* the decoder on the receiving side cannot process packed scalar arrays.* Such example is older protobuf.js. *//* #define PB_ENCODE_ARRAYS_UNPACKED 1 *//******************************************************************* You usually don't need to change anything below this line. ** Feel free to look around and use the defined macros, though. *******************************************************************//* Version of the nanopb library. Just in case you want to check it in* your own program. */#define NANOPB_VERSION nanopb-0.3.9.8/* Include all the system headers needed by nanopb. You will need the* definitions of the following:* - strlen, memcpy, memset functions* - [u]int_least8_t, uint_fast8_t, [u]int_least16_t, [u]int32_t, [u]int64_t* - size_t* - bool** If you don't have the standard header files, you can instead provide* a custom header that defines or includes all this. In that case,* define PB_SYSTEM_HEADER to the path of this file.*/#ifdef PB_SYSTEM_HEADER#include PB_SYSTEM_HEADER#else#include <stdint.h>#include <stddef.h>#include <stdbool.h>#include <string.h>#ifdef PB_ENABLE_MALLOC#include <stdlib.h>#endif#endif/* Macro for defining packed structures (compiler dependent).* This just reduces memory requirements, but is not required.*/#if defined(PB_NO_PACKED_STRUCTS)/* Disable struct packing */# define PB_PACKED_STRUCT_START# define PB_PACKED_STRUCT_END# define pb_packed#elif defined(__GNUC__) || defined(__clang__)/* For GCC and clang */# define PB_PACKED_STRUCT_START# define PB_PACKED_STRUCT_END# define pb_packed __attribute__((packed))#elif defined(__ICCARM__) || defined(__CC_ARM)/* For IAR ARM and Keil MDK-ARM compilers */# define PB_PACKED_STRUCT_START _Pragma("pack(push, 1)")# define PB_PACKED_STRUCT_END _Pragma("pack(pop)")# define pb_packed#elif defined(_MSC_VER) && (_MSC_VER >= 1500)/* For Microsoft Visual C++ */# define PB_PACKED_STRUCT_START __pragma(pack(push, 1))# define PB_PACKED_STRUCT_END __pragma(pack(pop))# define pb_packed#else/* Unknown compiler */# define PB_PACKED_STRUCT_START# define PB_PACKED_STRUCT_END# define pb_packed#endif/* Handly macro for suppressing unreferenced-parameter compiler warnings. */#ifndef PB_UNUSED#define PB_UNUSED(x) (void)(x)#endif/* Compile-time assertion, used for checking compatible compilation options.* If this does not work properly on your compiler, use* #define PB_NO_STATIC_ASSERT to disable it.** But before doing that, check carefully the error message / place where it* comes from to see if the error has a real cause. Unfortunately the error* message is not always very clear to read, but you can see the reason better* in the place where the PB_STATIC_ASSERT macro was called.*/#ifndef PB_NO_STATIC_ASSERT#ifndef PB_STATIC_ASSERT#define PB_STATIC_ASSERT(COND,MSG) typedef char PB_STATIC_ASSERT_MSG(MSG, __LINE__, __COUNTER__)[(COND)?1:-1];#define PB_STATIC_ASSERT_MSG(MSG, LINE, COUNTER) PB_STATIC_ASSERT_MSG_(MSG, LINE, COUNTER)#define PB_STATIC_ASSERT_MSG_(MSG, LINE, COUNTER) pb_static_assertion_##MSG##LINE##COUNTER#endif#else#define PB_STATIC_ASSERT(COND,MSG)#endif/* Number of required fields to keep track of. */#ifndef PB_MAX_REQUIRED_FIELDS#define PB_MAX_REQUIRED_FIELDS 64#endif#if PB_MAX_REQUIRED_FIELDS < 64#error You should not lower PB_MAX_REQUIRED_FIELDS from the default value (64).#endif/* List of possible field types. These are used in the autogenerated code.* Least-significant 4 bits tell the scalar type* Most-significant 4 bits specify repeated/required/packed etc.*/typedef uint_least8_t pb_type_t;/**** Field data types ****//* Numeric types */#define PB_LTYPE_BOOL 0x00 /* bool */#define PB_LTYPE_VARINT 0x01 /* int32, int64, enum, bool */#define PB_LTYPE_UVARINT 0x02 /* uint32, uint64 */#define PB_LTYPE_SVARINT 0x03 /* sint32, sint64 */#define PB_LTYPE_FIXED32 0x04 /* fixed32, sfixed32, float */#define PB_LTYPE_FIXED64 0x05 /* fixed64, sfixed64, double *//* Marker for last packable field type. */#define PB_LTYPE_LAST_PACKABLE 0x05/* Byte array with pre-allocated buffer.* data_size is the length of the allocated PB_BYTES_ARRAY structure. */#define PB_LTYPE_BYTES 0x06/* String with pre-allocated buffer.* data_size is the maximum length. */#define PB_LTYPE_STRING 0x07/* Submessage* submsg_fields is pointer to field descriptions */#define PB_LTYPE_SUBMESSAGE 0x08/* Extension pseudo-field* The field contains a pointer to pb_extension_t */#define PB_LTYPE_EXTENSION 0x09/* Byte array with inline, pre-allocated byffer.* data_size is the length of the inline, allocated buffer.* This differs from PB_LTYPE_BYTES by defining the element as* pb_byte_t[data_size] rather than pb_bytes_array_t. */#define PB_LTYPE_FIXED_LENGTH_BYTES 0x0A/* Number of declared LTYPES */#define PB_LTYPES_COUNT 0x0B#define PB_LTYPE_MASK 0x0F/**** Field repetition rules ****/#define PB_HTYPE_REQUIRED 0x00#define PB_HTYPE_OPTIONAL 0x10#define PB_HTYPE_REPEATED 0x20#define PB_HTYPE_ONEOF 0x30#define PB_HTYPE_MASK 0x30/**** Field allocation types ****/#define PB_ATYPE_STATIC 0x00#define PB_ATYPE_POINTER 0x80#define PB_ATYPE_CALLBACK 0x40#define PB_ATYPE_MASK 0xC0#define PB_ATYPE(x) ((x) & PB_ATYPE_MASK)#define PB_HTYPE(x) ((x) & PB_HTYPE_MASK)#define PB_LTYPE(x) ((x) & PB_LTYPE_MASK)/* Data type used for storing sizes of struct fields* and array counts.*/#if defined(PB_FIELD_32BIT)typedef uint32_t pb_size_t;typedef int32_t pb_ssize_t;#elif defined(PB_FIELD_16BIT)typedef uint_least16_t pb_size_t;typedef int_least16_t pb_ssize_t;#elsetypedef uint_least8_t pb_size_t;typedef int_least8_t pb_ssize_t;#endif#define PB_SIZE_MAX ((pb_size_t)-1)/* Data type for storing encoded data and other byte streams.* This typedef exists to support platforms where uint8_t does not exist.* You can regard it as equivalent on uint8_t on other platforms.*/typedef uint_least8_t pb_byte_t;/* This structure is used in auto-generated constants* to specify struct fields.* You can change field sizes if you need structures* larger than 256 bytes or field tags larger than 256.* The compiler should complain if your .proto has such* structures. Fix that by defining PB_FIELD_16BIT or* PB_FIELD_32BIT.*/PB_PACKED_STRUCT_STARTtypedef struct pb_field_s pb_field_t;struct pb_field_s {pb_size_t tag;pb_type_t type;pb_size_t data_offset; /* Offset of field data, relative to previous field. */pb_ssize_t size_offset; /* Offset of array size or has-boolean, relative to data */pb_size_t data_size; /* Data size in bytes for a single item */pb_size_t array_size; /* Maximum number of entries in array *//* Field definitions for submessage* OR default value for all other non-array, non-callback types* If null, then field will zeroed. */const void *ptr;} pb_packed;PB_PACKED_STRUCT_END/* Make sure that the standard integer types are of the expected sizes.* Otherwise fixed32/fixed64 fields can break.** If you get errors here, it probably means that your stdint.h is not* correct for your platform.*/#ifndef PB_WITHOUT_64BITPB_STATIC_ASSERT(sizeof(int64_t) == 2 * sizeof(int32_t), INT64_T_WRONG_SIZE)PB_STATIC_ASSERT(sizeof(uint64_t) == 2 * sizeof(uint32_t), UINT64_T_WRONG_SIZE)#endif/* This structure is used for 'bytes' arrays.* It has the number of bytes in the beginning, and after that an array.* Note that actual structs used will have a different length of bytes array.*/#define PB_BYTES_ARRAY_T(n) struct { pb_size_t size; pb_byte_t bytes[n]; }#define PB_BYTES_ARRAY_T_ALLOCSIZE(n) ((size_t)n + offsetof(pb_bytes_array_t, bytes))struct pb_bytes_array_s {pb_size_t size;pb_byte_t bytes[1];};typedef struct pb_bytes_array_s pb_bytes_array_t;/* This structure is used for giving the callback function.* It is stored in the message structure and filled in by the method that* calls pb_decode.** The decoding callback will be given a limited-length stream* If the wire type was string, the length is the length of the string.* If the wire type was a varint/fixed32/fixed64, the length is the length* of the actual value.* The function may be called multiple times (especially for repeated types,* but also otherwise if the message happens to contain the field multiple* times.)** The encoding callback will receive the actual output stream.* It should write all the data in one call, including the field tag and* wire type. It can write multiple fields.** The callback can be null if you want to skip a field.*/typedef struct pb_istream_s pb_istream_t;typedef struct pb_ostream_s pb_ostream_t;typedef struct pb_callback_s pb_callback_t;struct pb_callback_s {#ifdef PB_OLD_CALLBACK_STYLE/* Deprecated since nanopb-0.2.1 */union {bool (*decode)(pb_istream_t *stream, const pb_field_t *field, void *arg);bool (*encode)(pb_ostream_t *stream, const pb_field_t *field, const void *arg);} funcs;#else/* New function signature, which allows modifying arg contents in callback. */union {bool (*decode)(pb_istream_t *stream, const pb_field_t *field, void **arg);bool (*encode)(pb_ostream_t *stream, const pb_field_t *field, void * const *arg);} funcs;#endif/* Free arg for use by callback */void *arg;};/* Wire types. Library user needs these only in encoder callbacks. */typedef enum {PB_WT_VARINT = 0,PB_WT_64BIT = 1,PB_WT_STRING = 2,PB_WT_32BIT = 5} pb_wire_type_t;/* Structure for defining the handling of unknown/extension fields.* Usually the pb_extension_type_t structure is automatically generated,* while the pb_extension_t structure is created by the user. However,* if you want to catch all unknown fields, you can also create a custom* pb_extension_type_t with your own callback.*/typedef struct pb_extension_type_s pb_extension_type_t;typedef struct pb_extension_s pb_extension_t;struct pb_extension_type_s {/* Called for each unknown field in the message.* If you handle the field, read off all of its data and return true.* If you do not handle the field, do not read anything and return true.* If you run into an error, return false.* Set to NULL for default handler.*/bool (*decode)(pb_istream_t *stream, pb_extension_t *extension,uint32_t tag, pb_wire_type_t wire_type);/* Called once after all regular fields have been encoded.* If you have something to write, do so and return true.* If you do not have anything to write, just return true.* If you run into an error, return false.* Set to NULL for default handler.*/bool (*encode)(pb_ostream_t *stream, const pb_extension_t *extension);/* Free field for use by the callback. */const void *arg;};struct pb_extension_s {/* Type describing the extension field. Usually you'll initialize* this to a pointer to the automatically generated structure. */const pb_extension_type_t *type;/* Destination for the decoded data. This must match the datatype* of the extension field. */void *dest;/* Pointer to the next extension handler, or NULL.* If this extension does not match a field, the next handler is* automatically called. */pb_extension_t *next;/* The decoder sets this to true if the extension was found.* Ignored for encoding. */bool found;};/* Memory allocation functions to use. You can define pb_realloc and* pb_free to custom functions if you want. */#ifdef PB_ENABLE_MALLOC# ifndef pb_realloc# define pb_realloc(ptr, size) realloc(ptr, size)# endif# ifndef pb_free# define pb_free(ptr) free(ptr)# endif#endif/* This is used to inform about need to regenerate .pb.h/.pb.c files. */#define PB_PROTO_HEADER_VERSION 30/* These macros are used to declare pb_field_t's in the constant array. *//* Size of a structure member, in bytes. */#define pb_membersize(st, m) (sizeof ((st*)0)->m)/* Number of entries in an array. */#define pb_arraysize(st, m) (pb_membersize(st, m) / pb_membersize(st, m[0]))/* Delta from start of one member to the start of another member. */#define pb_delta(st, m1, m2) ((int)offsetof(st, m1) - (int)offsetof(st, m2))/* Marks the end of the field list */#define PB_LAST_FIELD {0,(pb_type_t) 0,0,0,0,0,0}/* Macros for filling in the data_offset field *//* data_offset for first field in a message */#define PB_DATAOFFSET_FIRST(st, m1, m2) (offsetof(st, m1))/* data_offset for subsequent fields */#define PB_DATAOFFSET_OTHER(st, m1, m2) (offsetof(st, m1) - offsetof(st, m2) - pb_membersize(st, m2))/* data offset for subsequent fields inside an union (oneof) */#define PB_DATAOFFSET_UNION(st, m1, m2) (PB_SIZE_MAX)/* Choose first/other based on m1 == m2 (deprecated, remains for backwards compatibility) */#define PB_DATAOFFSET_CHOOSE(st, m1, m2) (int)(offsetof(st, m1) == offsetof(st, m2) \? PB_DATAOFFSET_FIRST(st, m1, m2) \: PB_DATAOFFSET_OTHER(st, m1, m2))/* Required fields are the simplest. They just have delta (padding) from* previous field end, and the size of the field. Pointer is used for* submessages and default values.*/#define PB_REQUIRED_STATIC(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_STATIC | PB_HTYPE_REQUIRED | ltype, \fd, 0, pb_membersize(st, m), 0, ptr}/* Optional fields add the delta to the has_ variable. */#define PB_OPTIONAL_STATIC(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_STATIC | PB_HTYPE_OPTIONAL | ltype, \fd, \pb_delta(st, has_ ## m, m), \pb_membersize(st, m), 0, ptr}#define PB_SINGULAR_STATIC(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_STATIC | PB_HTYPE_OPTIONAL | ltype, \fd, 0, pb_membersize(st, m), 0, ptr}/* Repeated fields have a _count field and also the maximum number of entries. */#define PB_REPEATED_STATIC(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_STATIC | PB_HTYPE_REPEATED | ltype, \fd, \pb_delta(st, m ## _count, m), \pb_membersize(st, m[0]), \pb_arraysize(st, m), ptr}/* Allocated fields carry the size of the actual data, not the pointer */#define PB_REQUIRED_POINTER(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_POINTER | PB_HTYPE_REQUIRED | ltype, \fd, 0, pb_membersize(st, m[0]), 0, ptr}/* Optional fields don't need a has_ variable, as information would be redundant */#define PB_OPTIONAL_POINTER(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_POINTER | PB_HTYPE_OPTIONAL | ltype, \fd, 0, pb_membersize(st, m[0]), 0, ptr}/* Same as optional fields*/#define PB_SINGULAR_POINTER(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_POINTER | PB_HTYPE_OPTIONAL | ltype, \fd, 0, pb_membersize(st, m[0]), 0, ptr}/* Repeated fields have a _count field and a pointer to array of pointers */#define PB_REPEATED_POINTER(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_POINTER | PB_HTYPE_REPEATED | ltype, \fd, pb_delta(st, m ## _count, m), \pb_membersize(st, m[0]), 0, ptr}/* Callbacks are much like required fields except with special datatype. */#define PB_REQUIRED_CALLBACK(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_CALLBACK | PB_HTYPE_REQUIRED | ltype, \fd, 0, pb_membersize(st, m), 0, ptr}#define PB_OPTIONAL_CALLBACK(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_CALLBACK | PB_HTYPE_OPTIONAL | ltype, \fd, 0, pb_membersize(st, m), 0, ptr}#define PB_SINGULAR_CALLBACK(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_CALLBACK | PB_HTYPE_OPTIONAL | ltype, \fd, 0, pb_membersize(st, m), 0, ptr}#define PB_REPEATED_CALLBACK(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_CALLBACK | PB_HTYPE_REPEATED | ltype, \fd, 0, pb_membersize(st, m), 0, ptr}/* Optional extensions don't have the has_ field, as that would be redundant.* Furthermore, the combination of OPTIONAL without has_ field is used* for indicating proto3 style fields. Extensions exist in proto2 mode only,* so they should be encoded according to proto2 rules. To avoid the conflict,* extensions are marked as REQUIRED instead.*/#define PB_OPTEXT_STATIC(tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_STATIC | PB_HTYPE_REQUIRED | ltype, \0, \0, \pb_membersize(st, m), 0, ptr}#define PB_OPTEXT_POINTER(tag, st, m, fd, ltype, ptr) \PB_OPTIONAL_POINTER(tag, st, m, fd, ltype, ptr)#define PB_OPTEXT_CALLBACK(tag, st, m, fd, ltype, ptr) \PB_OPTIONAL_CALLBACK(tag, st, m, fd, ltype, ptr)/* The mapping from protobuf types to LTYPEs is done using these macros. */#define PB_LTYPE_MAP_BOOL PB_LTYPE_BOOL#define PB_LTYPE_MAP_BYTES PB_LTYPE_BYTES#define PB_LTYPE_MAP_DOUBLE PB_LTYPE_FIXED64#define PB_LTYPE_MAP_ENUM PB_LTYPE_VARINT#define PB_LTYPE_MAP_UENUM PB_LTYPE_UVARINT#define PB_LTYPE_MAP_FIXED32 PB_LTYPE_FIXED32#define PB_LTYPE_MAP_FIXED64 PB_LTYPE_FIXED64#define PB_LTYPE_MAP_FLOAT PB_LTYPE_FIXED32#define PB_LTYPE_MAP_INT32 PB_LTYPE_VARINT#define PB_LTYPE_MAP_INT64 PB_LTYPE_VARINT#define PB_LTYPE_MAP_MESSAGE PB_LTYPE_SUBMESSAGE#define PB_LTYPE_MAP_SFIXED32 PB_LTYPE_FIXED32#define PB_LTYPE_MAP_SFIXED64 PB_LTYPE_FIXED64#define PB_LTYPE_MAP_SINT32 PB_LTYPE_SVARINT#define PB_LTYPE_MAP_SINT64 PB_LTYPE_SVARINT#define PB_LTYPE_MAP_STRING PB_LTYPE_STRING#define PB_LTYPE_MAP_UINT32 PB_LTYPE_UVARINT#define PB_LTYPE_MAP_UINT64 PB_LTYPE_UVARINT#define PB_LTYPE_MAP_EXTENSION PB_LTYPE_EXTENSION#define PB_LTYPE_MAP_FIXED_LENGTH_BYTES PB_LTYPE_FIXED_LENGTH_BYTES/* This is the actual macro used in field descriptions.* It takes these arguments:* - Field tag number* - Field type: BOOL, BYTES, DOUBLE, ENUM, UENUM, FIXED32, FIXED64,* FLOAT, INT32, INT64, MESSAGE, SFIXED32, SFIXED64* SINT32, SINT64, STRING, UINT32, UINT64 or EXTENSION* - Field rules: REQUIRED, OPTIONAL or REPEATED* - Allocation: STATIC, CALLBACK or POINTER* - Placement: FIRST or OTHER, depending on if this is the first field in structure.* - Message name* - Field name* - Previous field name (or field name again for first field)* - Pointer to default value or submsg fields.*/#define PB_FIELD(tag, type, rules, allocation, placement, message, field, prevfield, ptr) \PB_ ## rules ## _ ## allocation(tag, message, field, \PB_DATAOFFSET_ ## placement(message, field, prevfield), \PB_LTYPE_MAP_ ## type, ptr)/* Field description for repeated static fixed count fields.*/#define PB_REPEATED_FIXED_COUNT(tag, type, placement, message, field, prevfield, ptr) \{tag, PB_ATYPE_STATIC | PB_HTYPE_REPEATED | PB_LTYPE_MAP_ ## type, \PB_DATAOFFSET_ ## placement(message, field, prevfield), \0, \pb_membersize(message, field[0]), \pb_arraysize(message, field), ptr}/* Field description for oneof fields. This requires taking into account the* union name also, that's why a separate set of macros is needed.*/#define PB_ONEOF_STATIC(u, tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_STATIC | PB_HTYPE_ONEOF | ltype, \fd, pb_delta(st, which_ ## u, u.m), \pb_membersize(st, u.m), 0, ptr}#define PB_ONEOF_POINTER(u, tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_POINTER | PB_HTYPE_ONEOF | ltype, \fd, pb_delta(st, which_ ## u, u.m), \pb_membersize(st, u.m[0]), 0, ptr}#define PB_ONEOF_FIELD(union_name, tag, type, rules, allocation, placement, message, field, prevfield, ptr) \PB_ONEOF_ ## allocation(union_name, tag, message, field, \PB_DATAOFFSET_ ## placement(message, union_name.field, prevfield), \PB_LTYPE_MAP_ ## type, ptr)#define PB_ANONYMOUS_ONEOF_STATIC(u, tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_STATIC | PB_HTYPE_ONEOF | ltype, \fd, pb_delta(st, which_ ## u, m), \pb_membersize(st, m), 0, ptr}#define PB_ANONYMOUS_ONEOF_POINTER(u, tag, st, m, fd, ltype, ptr) \{tag, PB_ATYPE_POINTER | PB_HTYPE_ONEOF | ltype, \fd, pb_delta(st, which_ ## u, m), \pb_membersize(st, m[0]), 0, ptr}#define PB_ANONYMOUS_ONEOF_FIELD(union_name, tag, type, rules, allocation, placement, message, field, prevfield, ptr) \PB_ANONYMOUS_ONEOF_ ## allocation(union_name, tag, message, field, \PB_DATAOFFSET_ ## placement(message, field, prevfield), \PB_LTYPE_MAP_ ## type, ptr)/* These macros are used for giving out error messages.* They are mostly a debugging aid; the main error information* is the true/false return value from functions.* Some code space can be saved by disabling the error* messages if not used.** PB_SET_ERROR() sets the error message if none has been set yet.* msg must be a constant string literal.* PB_GET_ERROR() always returns a pointer to a string.* PB_RETURN_ERROR() sets the error and returns false from current* function.*/#ifdef PB_NO_ERRMSG#define PB_SET_ERROR(stream, msg) PB_UNUSED(stream)#define PB_GET_ERROR(stream) "(errmsg disabled)"#else#define PB_SET_ERROR(stream, msg) (stream->errmsg = (stream)->errmsg ? (stream)->errmsg : (msg))#define PB_GET_ERROR(stream) ((stream)->errmsg ? (stream)->errmsg : "(none)")#endif#define PB_RETURN_ERROR(stream, msg) return PB_SET_ERROR(stream, msg), false#endif