/* 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-0.3.9.9 /* 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; #else typedef 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_START typedef 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_64BIT PB_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