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pb.h
1/* Common parts of the nanopb library. Most of these are quite low-level
2 * stuff. For the high-level interface, see pb_encode.h and pb_decode.h.
3 */
4
5#ifndef PB_H_INCLUDED
6#define PB_H_INCLUDED
7
8/*****************************************************************
9* Nanopb compilation time options. You can change these here by *
10* uncommenting the lines, or on the compiler command line. *
11*****************************************************************/
12
13/* Enable support for dynamically allocated fields */
14#define PB_ENABLE_MALLOC 1
15
16/* Define this if your CPU / compiler combination does not support
17 * unaligned memory access to packed structures. Note that packed
18 * structures are only used when requested in .proto options. */
19/* #define PB_NO_PACKED_STRUCTS 1 */
20
21/* Increase the number of required fields that are tracked.
22 * A compiler warning will tell if you need this. */
23/* #define PB_MAX_REQUIRED_FIELDS 256 */
24
25/* Add support for tag numbers > 65536 and fields larger than 65536 bytes. */
26/* #define PB_FIELD_32BIT 1 */
27
28/* Disable support for error messages in order to save some code space. */
29/* #define PB_NO_ERRMSG 1 */
30
31/* Disable support for custom streams (support only memory buffers). */
32/* #define PB_BUFFER_ONLY 1 */
33
34/* Disable support for 64-bit datatypes, for compilers without int64_t
35 * or to save some code space. */
36/* #define PB_WITHOUT_64BIT 1 */
37
38/* Don't encode scalar arrays as packed. This is only to be used when
39 * the decoder on the receiving side cannot process packed scalar arrays.
40 * Such example is older protobuf.js. */
41/* #define PB_ENCODE_ARRAYS_UNPACKED 1 */
42
43/* Enable conversion of doubles to floats for platforms that do not
44 * support 64-bit doubles. Most commonly AVR. */
45/* #define PB_CONVERT_DOUBLE_FLOAT 1 */
46
47/* Check whether incoming strings are valid UTF-8 sequences. Slows down
48 * the string processing slightly and slightly increases code size. */
49/* #define PB_VALIDATE_UTF8 1 */
50
51/* This can be defined if the platform is little-endian and has 8-bit bytes.
52 * Normally it is automatically detected based on __BYTE_ORDER__ macro. */
53/* #define PB_LITTLE_ENDIAN_8BIT 1 */
54
55/* Configure static assert mechanism. Instead of changing these, set your
56 * compiler to C11 standard mode if possible. */
57/* #define PB_C99_STATIC_ASSERT 1 */
58/* #define PB_NO_STATIC_ASSERT 1 */
59
60/******************************************************************
61* You usually don't need to change anything below this line. *
62* Feel free to look around and use the defined macros, though. *
63******************************************************************/
64
65
66/* Version of the nanopb library. Just in case you want to check it in
67 * your own program. */
68#define NANOPB_VERSION "nanopb-0.4.6-dev"
69
70/* Include all the system headers needed by nanopb. You will need the
71 * definitions of the following:
72 * - strlen, memcpy, memset functions
73 * - [u]int_least8_t, uint_fast8_t, [u]int_least16_t, [u]int32_t, [u]int64_t
74 * - size_t
75 * - bool
76 *
77 * If you don't have the standard header files, you can instead provide
78 * a custom header that defines or includes all this. In that case,
79 * define PB_SYSTEM_HEADER to the path of this file.
80 */
81#ifdef PB_SYSTEM_HEADER
82#include PB_SYSTEM_HEADER
83#else
84#include <stdint.h>
85#include <stddef.h>
86#include <stdbool.h>
87#include <string.h>
88#include <limits.h>
89
90#ifdef PB_ENABLE_MALLOC
91#include <stdlib.h>
92#endif
93#endif
94
95#ifdef __cplusplus
96extern "C" {
97#endif
98
99/* Macro for defining packed structures (compiler dependent).
100 * This just reduces memory requirements, but is not required.
101 */
102#if defined(PB_NO_PACKED_STRUCTS)
103/* Disable struct packing */
104# define PB_PACKED_STRUCT_START
105# define PB_PACKED_STRUCT_END
106# define pb_packed
107#elif defined(__GNUC__) || defined(__clang__)
108/* For GCC and clang */
109# define PB_PACKED_STRUCT_START
110# define PB_PACKED_STRUCT_END
111# define pb_packed __attribute__((packed))
112#elif defined(__ICCARM__) || defined(__CC_ARM)
113/* For IAR ARM and Keil MDK-ARM compilers */
114# define PB_PACKED_STRUCT_START _Pragma("pack(push, 1)")
115# define PB_PACKED_STRUCT_END _Pragma("pack(pop)")
116# define pb_packed
117#elif defined(_MSC_VER) && (_MSC_VER >= 1500)
118/* For Microsoft Visual C++ */
119# define PB_PACKED_STRUCT_START __pragma(pack(push, 1))
120# define PB_PACKED_STRUCT_END __pragma(pack(pop))
121# define pb_packed
122#else
123/* Unknown compiler */
124# define PB_PACKED_STRUCT_START
125# define PB_PACKED_STRUCT_END
126# define pb_packed
127#endif
128
129/* Detect endianness */
130#ifndef PB_LITTLE_ENDIAN_8BIT
131#if ((defined(__BYTE_ORDER) && __BYTE_ORDER == __LITTLE_ENDIAN) || \
132 (defined(__BYTE_ORDER__) && __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) || \
133 defined(__LITTLE_ENDIAN__) || defined(__ARMEL__) || \
134 defined(__THUMBEL__) || defined(__AARCH64EL__) || defined(_MIPSEL) || \
135 defined(_M_IX86) || defined(_M_X64) || defined(_M_ARM)) \
136 && CHAR_BIT == 8
137#define PB_LITTLE_ENDIAN_8BIT 1
138#endif
139#endif
140
141/* Handly macro for suppressing unreferenced-parameter compiler warnings. */
142#ifndef PB_UNUSED
143#define PB_UNUSED(x) (void)(x)
144#endif
145
146/* Harvard-architecture processors may need special attributes for storing
147 * field information in program memory. */
148#ifndef PB_PROGMEM
149#ifdef __AVR__
150#include <avr/pgmspace.h>
151#define PB_PROGMEM PROGMEM
152#define PB_PROGMEM_READU32(x) pgm_read_dword(&x)
153#else
154#define PB_PROGMEM
155#define PB_PROGMEM_READU32(x) (x)
156#endif
157#endif
158
159/* Compile-time assertion, used for checking compatible compilation options.
160 * If this does not work properly on your compiler, use
161 * #define PB_NO_STATIC_ASSERT to disable it.
162 *
163 * But before doing that, check carefully the error message / place where it
164 * comes from to see if the error has a real cause. Unfortunately the error
165 * message is not always very clear to read, but you can see the reason better
166 * in the place where the PB_STATIC_ASSERT macro was called.
167 */
168#ifndef PB_NO_STATIC_ASSERT
169# ifndef PB_STATIC_ASSERT
170# if defined(__ICCARM__)
171/* IAR has static_assert keyword but no _Static_assert */
172# define PB_STATIC_ASSERT(COND, MSG) static_assert(COND,#MSG);
173# elif defined(PB_C99_STATIC_ASSERT)
174/* Classic negative-size-array static assert mechanism */
175# define PB_STATIC_ASSERT(COND, MSG) typedef char PB_STATIC_ASSERT_MSG(MSG, __LINE__, __COUNTER__)[(COND)?1:-1];
176# define PB_STATIC_ASSERT_MSG(MSG, LINE, COUNTER) PB_STATIC_ASSERT_MSG_(MSG, LINE, COUNTER)
177# define PB_STATIC_ASSERT_MSG_(MSG, LINE, COUNTER) pb_static_assertion_ ## MSG ## _ ## LINE ## _ ## COUNTER
178# elif defined(__cplusplus)
179/* C++11 standard static_assert mechanism */
180# define PB_STATIC_ASSERT(COND, MSG) static_assert(COND,#MSG);
181# else
182/* C11 standard _Static_assert mechanism */
183# define PB_STATIC_ASSERT(COND, MSG) _Static_assert(COND,#MSG);
184# endif
185# endif
186#else
187/* Static asserts disabled by PB_NO_STATIC_ASSERT */
188# define PB_STATIC_ASSERT(COND, MSG)
189#endif
190
191/* Test that PB_STATIC_ASSERT works
192 * If you get errors here, you may need to do one of these:
193 * - Enable C11 standard support in your compiler
194 * - Define PB_C99_STATIC_ASSERT to enable C99 standard support
195 * - Define PB_NO_STATIC_ASSERT to disable static asserts altogether
196 */
197PB_STATIC_ASSERT(1, STATIC_ASSERT_IS_NOT_WORKING)
198
199/* Number of required fields to keep track of. */
200#ifndef PB_MAX_REQUIRED_FIELDS
201#define PB_MAX_REQUIRED_FIELDS 64
202#endif
203
204#if PB_MAX_REQUIRED_FIELDS < 64
205#error You should not lower PB_MAX_REQUIRED_FIELDS from the default value (64).
206#endif
207
208#ifdef PB_WITHOUT_64BIT
209#ifdef PB_CONVERT_DOUBLE_FLOAT
210/* Cannot use doubles without 64-bit types */
211#undef PB_CONVERT_DOUBLE_FLOAT
212#endif
213#endif
214
215/* List of possible field types. These are used in the autogenerated code.
216 * Least-significant 4 bits tell the scalar type
217 * Most-significant 4 bits specify repeated/required/packed etc.
218 */
219
220typedef uint_least8_t pb_type_t;
221
222/**** Field data types ****/
223
224/* Numeric types */
225#define PB_LTYPE_BOOL 0x00U /* bool */
226#define PB_LTYPE_VARINT 0x01U /* int32, int64, enum, bool */
227#define PB_LTYPE_UVARINT 0x02U /* uint32, uint64 */
228#define PB_LTYPE_SVARINT 0x03U /* sint32, sint64 */
229#define PB_LTYPE_FIXED32 0x04U /* fixed32, sfixed32, float */
230#define PB_LTYPE_FIXED64 0x05U /* fixed64, sfixed64, double */
231
232/* Marker for last packable field type. */
233#define PB_LTYPE_LAST_PACKABLE 0x05U
234
235/* Byte array with pre-allocated buffer.
236 * data_size is the length of the allocated PB_BYTES_ARRAY structure. */
237#define PB_LTYPE_BYTES 0x06U
238
239/* String with pre-allocated buffer.
240 * data_size is the maximum length. */
241#define PB_LTYPE_STRING 0x07U
242
243/* Submessage
244 * submsg_fields is pointer to field descriptions */
245#define PB_LTYPE_SUBMESSAGE 0x08U
246
247/* Submessage with pre-decoding callback
248 * The pre-decoding callback is stored as pb_callback_t right before pSize.
249 * submsg_fields is pointer to field descriptions */
250#define PB_LTYPE_SUBMSG_W_CB 0x09U
251
252/* Extension pseudo-field
253 * The field contains a pointer to pb_extension_t */
254#define PB_LTYPE_EXTENSION 0x0AU
255
256/* Byte array with inline, pre-allocated byffer.
257 * data_size is the length of the inline, allocated buffer.
258 * This differs from PB_LTYPE_BYTES by defining the element as
259 * pb_byte_t[data_size] rather than pb_bytes_array_t. */
260#define PB_LTYPE_FIXED_LENGTH_BYTES 0x0BU
261
262/* Number of declared LTYPES */
263#define PB_LTYPES_COUNT 0x0CU
264#define PB_LTYPE_MASK 0x0FU
265
266/**** Field repetition rules ****/
267
268#define PB_HTYPE_REQUIRED 0x00U
269#define PB_HTYPE_OPTIONAL 0x10U
270#define PB_HTYPE_SINGULAR 0x10U
271#define PB_HTYPE_REPEATED 0x20U
272#define PB_HTYPE_FIXARRAY 0x20U
273#define PB_HTYPE_ONEOF 0x30U
274#define PB_HTYPE_MASK 0x30U
275
276/**** Field allocation types ****/
277
278#define PB_ATYPE_STATIC 0x00U
279#define PB_ATYPE_POINTER 0x80U
280#define PB_ATYPE_CALLBACK 0x40U
281#define PB_ATYPE_MASK 0xC0U
282
283#define PB_ATYPE(x) ((x) & PB_ATYPE_MASK)
284#define PB_HTYPE(x) ((x) & PB_HTYPE_MASK)
285#define PB_LTYPE(x) ((x) & PB_LTYPE_MASK)
286#define PB_LTYPE_IS_SUBMSG(x) (PB_LTYPE(x) == PB_LTYPE_SUBMESSAGE || \
287 PB_LTYPE(x) == PB_LTYPE_SUBMSG_W_CB)
288
289/* Data type used for storing sizes of struct fields
290 * and array counts.
291 */
292#if defined(PB_FIELD_32BIT)
293typedef uint32_t pb_size_t;
294typedef int32_t pb_ssize_t;
295#else
296typedef uint_least16_t pb_size_t;
297typedef int_least16_t pb_ssize_t;
298#endif
299#define PB_SIZE_MAX ((pb_size_t)-1)
300
301/* Data type for storing encoded data and other byte streams.
302 * This typedef exists to support platforms where uint8_t does not exist.
303 * You can regard it as equivalent on uint8_t on other platforms.
304 */
305typedef uint_least8_t pb_byte_t;
306
307/* Forward declaration of struct types */
308typedef struct pb_istream_s pb_istream_t;
309typedef struct pb_ostream_s pb_ostream_t;
310typedef struct pb_field_iter_s pb_field_iter_t;
311
312/* This structure is used in auto-generated constants
313 * to specify struct fields.
314 */
315typedef struct pb_msgdesc_s pb_msgdesc_t;
316struct pb_msgdesc_s {
317 const uint32_t * field_info;
318 const pb_msgdesc_t *const * submsg_info;
319 const pb_byte_t * default_value;
320
321 bool (*field_callback)(pb_istream_t *istream, pb_ostream_t *ostream, const pb_field_iter_t *field);
322
323 pb_size_t field_count;
324 pb_size_t required_field_count;
325 pb_size_t largest_tag;
326};
327
328/* Iterator for message descriptor */
329struct pb_field_iter_s {
330 const pb_msgdesc_t * descriptor; /* Pointer to message descriptor constant */
331 void * message; /* Pointer to start of the structure */
332
333 pb_size_t index; /* Index of the field */
334 pb_size_t field_info_index; /* Index to descriptor->field_info array */
335 pb_size_t required_field_index; /* Index that counts only the required fields */
336 pb_size_t submessage_index; /* Index that counts only submessages */
337
338 pb_size_t tag; /* Tag of current field */
339 pb_size_t data_size; /* sizeof() of a single item */
340 pb_size_t array_size; /* Number of array entries */
341 pb_type_t type; /* Type of current field */
342
343 void * pField; /* Pointer to current field in struct */
344 void * pData; /* Pointer to current data contents. Different than pField for arrays and pointers. */
345 void * pSize; /* Pointer to count/has field */
346
347 const pb_msgdesc_t * submsg_desc; /* For submessage fields, pointer to field descriptor for the submessage. */
348};
349
350/* For compatibility with legacy code */
351typedef pb_field_iter_t pb_field_t;
352
353/* Make sure that the standard integer types are of the expected sizes.
354 * Otherwise fixed32/fixed64 fields can break.
355 *
356 * If you get errors here, it probably means that your stdint.h is not
357 * correct for your platform.
358 */
359#ifndef PB_WITHOUT_64BIT
360PB_STATIC_ASSERT(sizeof(int64_t) == 2 * sizeof(int32_t), INT64_T_WRONG_SIZE)
361PB_STATIC_ASSERT(sizeof(uint64_t) == 2 * sizeof(uint32_t), UINT64_T_WRONG_SIZE)
362#endif
363
364/* This structure is used for 'bytes' arrays.
365 * It has the number of bytes in the beginning, and after that an array.
366 * Note that actual structs used will have a different length of bytes array.
367 */
368#define PB_BYTES_ARRAY_T(n) struct { pb_size_t size; pb_byte_t bytes[n]; }
369#define PB_BYTES_ARRAY_T_ALLOCSIZE(n) ((size_t)n + offsetof(pb_bytes_array_t, bytes))
370
371struct pb_bytes_array_s {
372 pb_size_t size;
373 pb_byte_t bytes[1];
374};
375typedef struct pb_bytes_array_s pb_bytes_array_t;
376
377/* This structure is used for giving the callback function.
378 * It is stored in the message structure and filled in by the method that
379 * calls pb_decode.
380 *
381 * The decoding callback will be given a limited-length stream
382 * If the wire type was string, the length is the length of the string.
383 * If the wire type was a varint/fixed32/fixed64, the length is the length
384 * of the actual value.
385 * The function may be called multiple times (especially for repeated types,
386 * but also otherwise if the message happens to contain the field multiple
387 * times.)
388 *
389 * The encoding callback will receive the actual output stream.
390 * It should write all the data in one call, including the field tag and
391 * wire type. It can write multiple fields.
392 *
393 * The callback can be null if you want to skip a field.
394 */
395typedef struct pb_callback_s pb_callback_t;
396struct pb_callback_s {
397 /* Callback functions receive a pointer to the arg field.
398 * You can access the value of the field as *arg, and modify it if needed.
399 */
400 union {
401 bool (*decode)(pb_istream_t *stream, const pb_field_t *field, void **arg);
402 bool (*encode)(pb_ostream_t *stream, const pb_field_t *field, void *const *arg);
403 } funcs;
404
405 /* Free arg for use by callback */
406 void *arg;
407};
408
409extern bool pb_default_field_callback(pb_istream_t *istream, pb_ostream_t *ostream, const pb_field_t *field);
410
411/* Wire types. Library user needs these only in encoder callbacks. */
412typedef enum {
413 PB_WT_VARINT = 0,
414 PB_WT_64BIT = 1,
415 PB_WT_STRING = 2,
416 PB_WT_32BIT = 5,
417 PB_WT_PACKED = 255 /* PB_WT_PACKED is internal marker for packed arrays. */
418} pb_wire_type_t;
419
420/* Structure for defining the handling of unknown/extension fields.
421 * Usually the pb_extension_type_t structure is automatically generated,
422 * while the pb_extension_t structure is created by the user. However,
423 * if you want to catch all unknown fields, you can also create a custom
424 * pb_extension_type_t with your own callback.
425 */
426typedef struct pb_extension_type_s pb_extension_type_t;
427typedef struct pb_extension_s pb_extension_t;
428struct pb_extension_type_s {
429 /* Called for each unknown field in the message.
430 * If you handle the field, read off all of its data and return true.
431 * If you do not handle the field, do not read anything and return true.
432 * If you run into an error, return false.
433 * Set to NULL for default handler.
434 */
435 bool (*decode)(pb_istream_t *stream, pb_extension_t *extension, uint32_t tag, pb_wire_type_t wire_type);
436
437 /* Called once after all regular fields have been encoded.
438 * If you have something to write, do so and return true.
439 * If you do not have anything to write, just return true.
440 * If you run into an error, return false.
441 * Set to NULL for default handler.
442 */
443 bool (*encode)(pb_ostream_t *stream, const pb_extension_t *extension);
444
445 /* Free field for use by the callback. */
446 const void * arg;
447};
448
449struct pb_extension_s {
450 /* Type describing the extension field. Usually you'll initialize
451 * this to a pointer to the automatically generated structure. */
452 const pb_extension_type_t * type;
453
454 /* Destination for the decoded data. This must match the datatype
455 * of the extension field. */
456 void * dest;
457
458 /* Pointer to the next extension handler, or NULL.
459 * If this extension does not match a field, the next handler is
460 * automatically called. */
461 pb_extension_t * next;
462
463 /* The decoder sets this to true if the extension was found.
464 * Ignored for encoding. */
465 bool found;
466};
467
468#define pb_extension_init_zero { NULL, NULL, NULL, false }
469
470/* Memory allocation functions to use. You can define pb_realloc and
471 * pb_free to custom functions if you want. */
472#ifdef PB_ENABLE_MALLOC
473# ifndef pb_realloc
474# define pb_realloc(ptr, size) realloc(ptr, size)
475# endif
476# ifndef pb_free
477# define pb_free(ptr) free(ptr)
478# endif
479#endif
480
481/* This is used to inform about need to regenerate .pb.h/.pb.c files. */
482#define PB_PROTO_HEADER_VERSION 40
483
484/* These macros are used to declare pb_field_t's in the constant array. */
485/* Size of a structure member, in bytes. */
486#define pb_membersize(st, m) (sizeof((st *)0)->m)
487/* Number of entries in an array. */
488#define pb_arraysize(st, m) (pb_membersize(st, m) / pb_membersize(st, m[0]))
489/* Delta from start of one member to the start of another member. */
490#define pb_delta(st, m1, m2) ((int)offsetof(st, m1) - (int)offsetof(st, m2))
491
492/* Force expansion of macro value */
493#define PB_EXPAND(x) x
494
495/* Binding of a message field set into a specific structure */
496#define PB_BIND(msgname, structname, width) \
497 const uint32_t structname ## _field_info[] PB_PROGMEM = \
498 { \
499 msgname ## _FIELDLIST(PB_GEN_FIELD_INFO_ ## width, structname) \
500 0 \
501 }; \
502 const pb_msgdesc_t *const structname ## _submsg_info[] = \
503 { \
504 msgname ## _FIELDLIST(PB_GEN_SUBMSG_INFO, structname) \
505 NULL \
506 }; \
507 const pb_msgdesc_t structname ## _msg = \
508 { \
509 structname ## _field_info, \
510 structname ## _submsg_info, \
511 msgname ## _DEFAULT, \
512 msgname ## _CALLBACK, \
513 0 msgname ## _FIELDLIST(PB_GEN_FIELD_COUNT, structname), \
514 0 msgname ## _FIELDLIST(PB_GEN_REQ_FIELD_COUNT, structname), \
515 0 msgname ## _FIELDLIST(PB_GEN_LARGEST_TAG, structname), \
516 }; \
517 msgname ## _FIELDLIST(PB_GEN_FIELD_INFO_ASSERT_ ## width, structname)
518
519#define PB_GEN_FIELD_COUNT(structname, atype, htype, ltype, fieldname, tag) + 1
520#define PB_GEN_REQ_FIELD_COUNT(structname, atype, htype, ltype, fieldname, tag) \
521 + (PB_HTYPE_ ## htype == PB_HTYPE_REQUIRED)
522#define PB_GEN_LARGEST_TAG(structname, atype, htype, ltype, fieldname, tag) \
523 *0 + tag
524
525/* X-macro for generating the entries in struct_field_info[] array. */
526#define PB_GEN_FIELD_INFO_1(structname, atype, htype, ltype, fieldname, tag) \
527 PB_FIELDINFO_1(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
528 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
529 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
530 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
531 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
532
533#define PB_GEN_FIELD_INFO_2(structname, atype, htype, ltype, fieldname, tag) \
534 PB_FIELDINFO_2(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
535 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
536 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
537 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
538 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
539
540#define PB_GEN_FIELD_INFO_4(structname, atype, htype, ltype, fieldname, tag) \
541 PB_FIELDINFO_4(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
542 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
543 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
544 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
545 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
546
547#define PB_GEN_FIELD_INFO_8(structname, atype, htype, ltype, fieldname, tag) \
548 PB_FIELDINFO_8(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
549 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
550 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
551 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
552 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
553
554#define PB_GEN_FIELD_INFO_AUTO(structname, atype, htype, ltype, fieldname, tag) \
555 PB_FIELDINFO_AUTO2(PB_FIELDINFO_WIDTH_AUTO(_PB_ATYPE_ ## atype, _PB_HTYPE_ ## htype, _PB_LTYPE_ ## ltype), \
556 tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
557 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
558 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
559 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
560 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
561
562#define PB_FIELDINFO_AUTO2(width, tag, type, data_offset, data_size, size_offset, array_size) \
563 PB_FIELDINFO_AUTO3(width, tag, type, data_offset, data_size, size_offset, array_size)
564
565#define PB_FIELDINFO_AUTO3(width, tag, type, data_offset, data_size, size_offset, array_size) \
566 PB_FIELDINFO_ ## width(tag, type, data_offset, data_size, size_offset, array_size)
567
568/* X-macro for generating asserts that entries fit in struct_field_info[] array.
569 * The structure of macros here must match the structure above in PB_GEN_FIELD_INFO_x(),
570 * but it is not easily reused because of how macro substitutions work. */
571#define PB_GEN_FIELD_INFO_ASSERT_1(structname, atype, htype, ltype, fieldname, tag) \
572 PB_FIELDINFO_ASSERT_1(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
573 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
574 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
575 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
576 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
577
578#define PB_GEN_FIELD_INFO_ASSERT_2(structname, atype, htype, ltype, fieldname, tag) \
579 PB_FIELDINFO_ASSERT_2(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
580 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
581 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
582 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
583 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
584
585#define PB_GEN_FIELD_INFO_ASSERT_4(structname, atype, htype, ltype, fieldname, tag) \
586 PB_FIELDINFO_ASSERT_4(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
587 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
588 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
589 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
590 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
591
592#define PB_GEN_FIELD_INFO_ASSERT_8(structname, atype, htype, ltype, fieldname, tag) \
593 PB_FIELDINFO_ASSERT_8(tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
594 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
595 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
596 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
597 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
598
599#define PB_GEN_FIELD_INFO_ASSERT_AUTO(structname, atype, htype, ltype, fieldname, tag) \
600 PB_FIELDINFO_ASSERT_AUTO2(PB_FIELDINFO_WIDTH_AUTO(_PB_ATYPE_ ## atype, _PB_HTYPE_ ## htype, _PB_LTYPE_ ## ltype), \
601 tag, PB_ATYPE_ ## atype | PB_HTYPE_ ## htype | PB_LTYPE_MAP_ ## ltype, \
602 PB_DATA_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
603 PB_DATA_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
604 PB_SIZE_OFFSET_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname), \
605 PB_ARRAY_SIZE_ ## atype(_PB_HTYPE_ ## htype, structname, fieldname))
606
607#define PB_FIELDINFO_ASSERT_AUTO2(width, tag, type, data_offset, data_size, size_offset, array_size) \
608 PB_FIELDINFO_ASSERT_AUTO3(width, tag, type, data_offset, data_size, size_offset, array_size)
609
610#define PB_FIELDINFO_ASSERT_AUTO3(width, tag, type, data_offset, data_size, size_offset, array_size) \
611 PB_FIELDINFO_ASSERT_ ## width(tag, type, data_offset, data_size, size_offset, array_size)
612
613#define PB_DATA_OFFSET_STATIC(htype, structname, fieldname) PB_DO ## htype(structname, fieldname)
614#define PB_DATA_OFFSET_POINTER(htype, structname, fieldname) PB_DO ## htype(structname, fieldname)
615#define PB_DATA_OFFSET_CALLBACK(htype, structname, fieldname) PB_DO ## htype(structname, fieldname)
616#define PB_DO_PB_HTYPE_REQUIRED(structname, fieldname) offsetof(structname, fieldname)
617#define PB_DO_PB_HTYPE_SINGULAR(structname, fieldname) offsetof(structname, fieldname)
618#define PB_DO_PB_HTYPE_ONEOF(structname, fieldname) offsetof(structname, PB_ONEOF_NAME(FULL, fieldname))
619#define PB_DO_PB_HTYPE_OPTIONAL(structname, fieldname) offsetof(structname, fieldname)
620#define PB_DO_PB_HTYPE_REPEATED(structname, fieldname) offsetof(structname, fieldname)
621#define PB_DO_PB_HTYPE_FIXARRAY(structname, fieldname) offsetof(structname, fieldname)
622
623#define PB_SIZE_OFFSET_STATIC(htype, structname, fieldname) PB_SO ## htype(structname, fieldname)
624#define PB_SIZE_OFFSET_POINTER(htype, structname, fieldname) PB_SO_PTR ## htype(structname, fieldname)
625#define PB_SIZE_OFFSET_CALLBACK(htype, structname, fieldname) PB_SO_CB ## htype(structname, fieldname)
626#define PB_SO_PB_HTYPE_REQUIRED(structname, fieldname) 0
627#define PB_SO_PB_HTYPE_SINGULAR(structname, fieldname) 0
628#define PB_SO_PB_HTYPE_ONEOF(structname, fieldname) PB_SO_PB_HTYPE_ONEOF2(structname, PB_ONEOF_NAME(FULL, fieldname), PB_ONEOF_NAME(UNION, fieldname))
629#define PB_SO_PB_HTYPE_ONEOF2(structname, fullname, unionname) PB_SO_PB_HTYPE_ONEOF3(structname, fullname, unionname)
630#define PB_SO_PB_HTYPE_ONEOF3(structname, fullname, unionname) pb_delta(structname, fullname, which_ ## unionname)
631#define PB_SO_PB_HTYPE_OPTIONAL(structname, fieldname) pb_delta(structname, fieldname, has_ ## fieldname)
632#define PB_SO_PB_HTYPE_REPEATED(structname, fieldname) pb_delta(structname, fieldname, fieldname ## _count)
633#define PB_SO_PB_HTYPE_FIXARRAY(structname, fieldname) 0
634#define PB_SO_PTR_PB_HTYPE_REQUIRED(structname, fieldname) 0
635#define PB_SO_PTR_PB_HTYPE_SINGULAR(structname, fieldname) 0
636#define PB_SO_PTR_PB_HTYPE_ONEOF(structname, fieldname) PB_SO_PB_HTYPE_ONEOF(structname, fieldname)
637#define PB_SO_PTR_PB_HTYPE_OPTIONAL(structname, fieldname) 0
638#define PB_SO_PTR_PB_HTYPE_REPEATED(structname, fieldname) PB_SO_PB_HTYPE_REPEATED(structname, fieldname)
639#define PB_SO_PTR_PB_HTYPE_FIXARRAY(structname, fieldname) 0
640#define PB_SO_CB_PB_HTYPE_REQUIRED(structname, fieldname) 0
641#define PB_SO_CB_PB_HTYPE_SINGULAR(structname, fieldname) 0
642#define PB_SO_CB_PB_HTYPE_ONEOF(structname, fieldname) PB_SO_PB_HTYPE_ONEOF(structname, fieldname)
643#define PB_SO_CB_PB_HTYPE_OPTIONAL(structname, fieldname) 0
644#define PB_SO_CB_PB_HTYPE_REPEATED(structname, fieldname) 0
645#define PB_SO_CB_PB_HTYPE_FIXARRAY(structname, fieldname) 0
646
647#define PB_ARRAY_SIZE_STATIC(htype, structname, fieldname) PB_AS ## htype(structname, fieldname)
648#define PB_ARRAY_SIZE_POINTER(htype, structname, fieldname) PB_AS_PTR ## htype(structname, fieldname)
649#define PB_ARRAY_SIZE_CALLBACK(htype, structname, fieldname) 1
650#define PB_AS_PB_HTYPE_REQUIRED(structname, fieldname) 1
651#define PB_AS_PB_HTYPE_SINGULAR(structname, fieldname) 1
652#define PB_AS_PB_HTYPE_OPTIONAL(structname, fieldname) 1
653#define PB_AS_PB_HTYPE_ONEOF(structname, fieldname) 1
654#define PB_AS_PB_HTYPE_REPEATED(structname, fieldname) pb_arraysize(structname, fieldname)
655#define PB_AS_PB_HTYPE_FIXARRAY(structname, fieldname) pb_arraysize(structname, fieldname)
656#define PB_AS_PTR_PB_HTYPE_REQUIRED(structname, fieldname) 1
657#define PB_AS_PTR_PB_HTYPE_SINGULAR(structname, fieldname) 1
658#define PB_AS_PTR_PB_HTYPE_OPTIONAL(structname, fieldname) 1
659#define PB_AS_PTR_PB_HTYPE_ONEOF(structname, fieldname) 1
660#define PB_AS_PTR_PB_HTYPE_REPEATED(structname, fieldname) 1
661#define PB_AS_PTR_PB_HTYPE_FIXARRAY(structname, fieldname) pb_arraysize(structname, fieldname[0])
662
663#define PB_DATA_SIZE_STATIC(htype, structname, fieldname) PB_DS ## htype(structname, fieldname)
664#define PB_DATA_SIZE_POINTER(htype, structname, fieldname) PB_DS_PTR ## htype(structname, fieldname)
665#define PB_DATA_SIZE_CALLBACK(htype, structname, fieldname) PB_DS_CB ## htype(structname, fieldname)
666#define PB_DS_PB_HTYPE_REQUIRED(structname, fieldname) pb_membersize(structname, fieldname)
667#define PB_DS_PB_HTYPE_SINGULAR(structname, fieldname) pb_membersize(structname, fieldname)
668#define PB_DS_PB_HTYPE_OPTIONAL(structname, fieldname) pb_membersize(structname, fieldname)
669#define PB_DS_PB_HTYPE_ONEOF(structname, fieldname) pb_membersize(structname, PB_ONEOF_NAME(FULL, fieldname))
670#define PB_DS_PB_HTYPE_REPEATED(structname, fieldname) pb_membersize(structname, fieldname[0])
671#define PB_DS_PB_HTYPE_FIXARRAY(structname, fieldname) pb_membersize(structname, fieldname[0])
672#define PB_DS_PTR_PB_HTYPE_REQUIRED(structname, fieldname) pb_membersize(structname, fieldname[0])
673#define PB_DS_PTR_PB_HTYPE_SINGULAR(structname, fieldname) pb_membersize(structname, fieldname[0])
674#define PB_DS_PTR_PB_HTYPE_OPTIONAL(structname, fieldname) pb_membersize(structname, fieldname[0])
675#define PB_DS_PTR_PB_HTYPE_ONEOF(structname, fieldname) pb_membersize(structname, PB_ONEOF_NAME(FULL, fieldname)[0])
676#define PB_DS_PTR_PB_HTYPE_REPEATED(structname, fieldname) pb_membersize(structname, fieldname[0])
677#define PB_DS_PTR_PB_HTYPE_FIXARRAY(structname, fieldname) pb_membersize(structname, fieldname[0][0])
678#define PB_DS_CB_PB_HTYPE_REQUIRED(structname, fieldname) pb_membersize(structname, fieldname)
679#define PB_DS_CB_PB_HTYPE_SINGULAR(structname, fieldname) pb_membersize(structname, fieldname)
680#define PB_DS_CB_PB_HTYPE_OPTIONAL(structname, fieldname) pb_membersize(structname, fieldname)
681#define PB_DS_CB_PB_HTYPE_ONEOF(structname, fieldname) pb_membersize(structname, PB_ONEOF_NAME(FULL, fieldname))
682#define PB_DS_CB_PB_HTYPE_REPEATED(structname, fieldname) pb_membersize(structname, fieldname)
683#define PB_DS_CB_PB_HTYPE_FIXARRAY(structname, fieldname) pb_membersize(structname, fieldname)
684
685#define PB_ONEOF_NAME(type, tuple) PB_EXPAND(PB_ONEOF_NAME_ ## type tuple)
686#define PB_ONEOF_NAME_UNION(unionname, membername, fullname) unionname
687#define PB_ONEOF_NAME_MEMBER(unionname, membername, fullname) membername
688#define PB_ONEOF_NAME_FULL(unionname, membername, fullname) fullname
689
690#define PB_GEN_SUBMSG_INFO(structname, atype, htype, ltype, fieldname, tag) \
691 PB_SUBMSG_INFO_ ## htype(_PB_LTYPE_ ## ltype, structname, fieldname)
692
693#define PB_SUBMSG_INFO_REQUIRED(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
694#define PB_SUBMSG_INFO_SINGULAR(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
695#define PB_SUBMSG_INFO_OPTIONAL(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
696#define PB_SUBMSG_INFO_ONEOF(ltype, structname, fieldname) PB_SUBMSG_INFO_ONEOF2(ltype, structname, PB_ONEOF_NAME(UNION, fieldname), PB_ONEOF_NAME(MEMBER, fieldname))
697#define PB_SUBMSG_INFO_ONEOF2(ltype, structname, unionname, membername) PB_SUBMSG_INFO_ONEOF3(ltype, structname, unionname, membername)
698#define PB_SUBMSG_INFO_ONEOF3(ltype, structname, unionname, membername) PB_SI ## ltype(structname ## _ ## unionname ## _ ## membername ## _MSGTYPE)
699#define PB_SUBMSG_INFO_REPEATED(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
700#define PB_SUBMSG_INFO_FIXARRAY(ltype, structname, fieldname) PB_SI ## ltype(structname ## _ ## fieldname ## _MSGTYPE)
701#define PB_SI_PB_LTYPE_BOOL(t)
702#define PB_SI_PB_LTYPE_BYTES(t)
703#define PB_SI_PB_LTYPE_DOUBLE(t)
704#define PB_SI_PB_LTYPE_ENUM(t)
705#define PB_SI_PB_LTYPE_UENUM(t)
706#define PB_SI_PB_LTYPE_FIXED32(t)
707#define PB_SI_PB_LTYPE_FIXED64(t)
708#define PB_SI_PB_LTYPE_FLOAT(t)
709#define PB_SI_PB_LTYPE_INT32(t)
710#define PB_SI_PB_LTYPE_INT64(t)
711#define PB_SI_PB_LTYPE_MESSAGE(t) PB_SUBMSG_DESCRIPTOR(t)
712#define PB_SI_PB_LTYPE_MSG_W_CB(t) PB_SUBMSG_DESCRIPTOR(t)
713#define PB_SI_PB_LTYPE_SFIXED32(t)
714#define PB_SI_PB_LTYPE_SFIXED64(t)
715#define PB_SI_PB_LTYPE_SINT32(t)
716#define PB_SI_PB_LTYPE_SINT64(t)
717#define PB_SI_PB_LTYPE_STRING(t)
718#define PB_SI_PB_LTYPE_UINT32(t)
719#define PB_SI_PB_LTYPE_UINT64(t)
720#define PB_SI_PB_LTYPE_EXTENSION(t)
721#define PB_SI_PB_LTYPE_FIXED_LENGTH_BYTES(t)
722#define PB_SUBMSG_DESCRIPTOR(t) & (t ## _msg),
723
724/* The field descriptors use a variable width format, with width of either
725 * 1, 2, 4 or 8 of 32-bit words. The two lowest bytes of the first byte always
726 * encode the descriptor size, 6 lowest bits of field tag number, and 8 bits
727 * of the field type.
728 *
729 * Descriptor size is encoded as 0 = 1 word, 1 = 2 words, 2 = 4 words, 3 = 8 words.
730 *
731 * Formats, listed starting with the least significant bit of the first word.
732 * 1 word: [2-bit len] [6-bit tag] [8-bit type] [8-bit data_offset] [4-bit size_offset] [4-bit data_size]
733 *
734 * 2 words: [2-bit len] [6-bit tag] [8-bit type] [12-bit array_size] [4-bit size_offset]
735 * [16-bit data_offset] [12-bit data_size] [4-bit tag>>6]
736 *
737 * 4 words: [2-bit len] [6-bit tag] [8-bit type] [16-bit array_size]
738 * [8-bit size_offset] [24-bit tag>>6]
739 * [32-bit data_offset]
740 * [32-bit data_size]
741 *
742 * 8 words: [2-bit len] [6-bit tag] [8-bit type] [16-bit reserved]
743 * [8-bit size_offset] [24-bit tag>>6]
744 * [32-bit data_offset]
745 * [32-bit data_size]
746 * [32-bit array_size]
747 * [32-bit reserved]
748 * [32-bit reserved]
749 * [32-bit reserved]
750 */
751
752#define PB_FIELDINFO_1(tag, type, data_offset, data_size, size_offset, array_size) \
753 (0 | (((tag) << 2) & 0xFF) | ((type) << 8) | (((uint32_t)(data_offset) & 0xFF) << 16) | \
754 (((uint32_t)(size_offset) & 0x0F) << 24) | (((uint32_t)(data_size) & 0x0F) << 28)),
755
756#define PB_FIELDINFO_2(tag, type, data_offset, data_size, size_offset, array_size) \
757 (1 | (((tag) << 2) & 0xFF) | ((type) << 8) | (((uint32_t)(array_size) & 0xFFF) << 16) | (((uint32_t)(size_offset) & 0x0F) << 28)), \
758 (((uint32_t)(data_offset) & 0xFFFF) | (((uint32_t)(data_size) & 0xFFF) << 16) | (((uint32_t)(tag) & 0x3c0) << 22)),
759
760#define PB_FIELDINFO_4(tag, type, data_offset, data_size, size_offset, array_size) \
761 (2 | (((tag) << 2) & 0xFF) | ((type) << 8) | (((uint32_t)(array_size) & 0xFFFF) << 16)), \
762 ((uint32_t)(int_least8_t)(size_offset) | (((uint32_t)(tag) << 2) & 0xFFFFFF00)), \
763 (data_offset), (data_size),
764
765#define PB_FIELDINFO_8(tag, type, data_offset, data_size, size_offset, array_size) \
766 (3 | (((tag) << 2) & 0xFF) | ((type) << 8)), \
767 ((uint32_t)(int_least8_t)(size_offset) | (((uint32_t)(tag) << 2) & 0xFFFFFF00)), \
768 (data_offset), (data_size), (array_size), 0, 0, 0,
769
770/* These assertions verify that the field information fits in the allocated space.
771 * The generator tries to automatically determine the correct width that can fit all
772 * data associated with a message. These asserts will fail only if there has been a
773 * problem in the automatic logic - this may be worth reporting as a bug. As a workaround,
774 * you can increase the descriptor width by defining PB_FIELDINFO_WIDTH or by setting
775 * descriptorsize option in .options file.
776 */
777#define PB_FITS(value, bits) ((uint32_t)(value) < ((uint32_t)1 << bits))
778#define PB_FIELDINFO_ASSERT_1(tag, type, data_offset, data_size, size_offset, array_size) \
779 PB_STATIC_ASSERT(PB_FITS(tag, 6) && PB_FITS(data_offset, 8) && PB_FITS(size_offset, 4) && PB_FITS(data_size, 4) && PB_FITS(array_size, 1), FIELDINFO_DOES_NOT_FIT_width1_field ## tag)
780
781#define PB_FIELDINFO_ASSERT_2(tag, type, data_offset, data_size, size_offset, array_size) \
782 PB_STATIC_ASSERT(PB_FITS(tag, 10) && PB_FITS(data_offset, 16) && PB_FITS(size_offset, 4) && PB_FITS(data_size, 12) && PB_FITS(array_size, 12), FIELDINFO_DOES_NOT_FIT_width2_field ## tag)
783
784#ifndef PB_FIELD_32BIT
785/* Maximum field sizes are still 16-bit if pb_size_t is 16-bit */
786#define PB_FIELDINFO_ASSERT_4(tag, type, data_offset, data_size, size_offset, array_size) \
787 PB_STATIC_ASSERT(PB_FITS(tag, 16) && PB_FITS(data_offset, 16) && PB_FITS((int_least8_t)size_offset, 8) && PB_FITS(data_size, 16) && PB_FITS(array_size, 16), FIELDINFO_DOES_NOT_FIT_width4_field ## tag)
788
789#define PB_FIELDINFO_ASSERT_8(tag, type, data_offset, data_size, size_offset, array_size) \
790 PB_STATIC_ASSERT(PB_FITS(tag, 16) && PB_FITS(data_offset, 16) && PB_FITS((int_least8_t)size_offset, 8) && PB_FITS(data_size, 16) && PB_FITS(array_size, 16), FIELDINFO_DOES_NOT_FIT_width8_field ## tag)
791#else
792/* Up to 32-bit fields supported.
793 * Note that the checks are against 31 bits to avoid compiler warnings about shift wider than type in the test.
794 * I expect that there is no reasonable use for >2GB messages with nanopb anyway.
795 */
796#define PB_FIELDINFO_ASSERT_4(tag, type, data_offset, data_size, size_offset, array_size) \
797 PB_STATIC_ASSERT(PB_FITS(tag, 30) && PB_FITS(data_offset, 31) && PB_FITS(size_offset, 8) && PB_FITS(data_size, 31) && PB_FITS(array_size, 16), FIELDINFO_DOES_NOT_FIT_width4_field ## tag)
798
799#define PB_FIELDINFO_ASSERT_8(tag, type, data_offset, data_size, size_offset, array_size) \
800 PB_STATIC_ASSERT(PB_FITS(tag, 30) && PB_FITS(data_offset, 31) && PB_FITS(size_offset, 8) && PB_FITS(data_size, 31) && PB_FITS(array_size, 31), FIELDINFO_DOES_NOT_FIT_width8_field ## tag)
801#endif
802
803
804/* Automatic picking of FIELDINFO width:
805 * Uses width 1 when possible, otherwise resorts to width 2.
806 * This is used when PB_BIND() is called with "AUTO" as the argument.
807 * The generator will give explicit size argument when it knows that a message
808 * structure grows beyond 1-word format limits.
809 */
810#define PB_FIELDINFO_WIDTH_AUTO(atype, htype, ltype) PB_FI_WIDTH ## atype(htype, ltype)
811#define PB_FI_WIDTH_PB_ATYPE_STATIC(htype, ltype) PB_FI_WIDTH ## htype(ltype)
812#define PB_FI_WIDTH_PB_ATYPE_POINTER(htype, ltype) PB_FI_WIDTH ## htype(ltype)
813#define PB_FI_WIDTH_PB_ATYPE_CALLBACK(htype, ltype) 2
814#define PB_FI_WIDTH_PB_HTYPE_REQUIRED(ltype) PB_FI_WIDTH ## ltype
815#define PB_FI_WIDTH_PB_HTYPE_SINGULAR(ltype) PB_FI_WIDTH ## ltype
816#define PB_FI_WIDTH_PB_HTYPE_OPTIONAL(ltype) PB_FI_WIDTH ## ltype
817#define PB_FI_WIDTH_PB_HTYPE_ONEOF(ltype) PB_FI_WIDTH ## ltype
818#define PB_FI_WIDTH_PB_HTYPE_REPEATED(ltype) 2
819#define PB_FI_WIDTH_PB_HTYPE_FIXARRAY(ltype) 2
820#define PB_FI_WIDTH_PB_LTYPE_BOOL 1
821#define PB_FI_WIDTH_PB_LTYPE_BYTES 2
822#define PB_FI_WIDTH_PB_LTYPE_DOUBLE 1
823#define PB_FI_WIDTH_PB_LTYPE_ENUM 1
824#define PB_FI_WIDTH_PB_LTYPE_UENUM 1
825#define PB_FI_WIDTH_PB_LTYPE_FIXED32 1
826#define PB_FI_WIDTH_PB_LTYPE_FIXED64 1
827#define PB_FI_WIDTH_PB_LTYPE_FLOAT 1
828#define PB_FI_WIDTH_PB_LTYPE_INT32 1
829#define PB_FI_WIDTH_PB_LTYPE_INT64 1
830#define PB_FI_WIDTH_PB_LTYPE_MESSAGE 2
831#define PB_FI_WIDTH_PB_LTYPE_MSG_W_CB 2
832#define PB_FI_WIDTH_PB_LTYPE_SFIXED32 1
833#define PB_FI_WIDTH_PB_LTYPE_SFIXED64 1
834#define PB_FI_WIDTH_PB_LTYPE_SINT32 1
835#define PB_FI_WIDTH_PB_LTYPE_SINT64 1
836#define PB_FI_WIDTH_PB_LTYPE_STRING 2
837#define PB_FI_WIDTH_PB_LTYPE_UINT32 1
838#define PB_FI_WIDTH_PB_LTYPE_UINT64 1
839#define PB_FI_WIDTH_PB_LTYPE_EXTENSION 1
840#define PB_FI_WIDTH_PB_LTYPE_FIXED_LENGTH_BYTES 2
841
842/* The mapping from protobuf types to LTYPEs is done using these macros. */
843#define PB_LTYPE_MAP_BOOL PB_LTYPE_BOOL
844#define PB_LTYPE_MAP_BYTES PB_LTYPE_BYTES
845#define PB_LTYPE_MAP_DOUBLE PB_LTYPE_FIXED64
846#define PB_LTYPE_MAP_ENUM PB_LTYPE_VARINT
847#define PB_LTYPE_MAP_UENUM PB_LTYPE_UVARINT
848#define PB_LTYPE_MAP_FIXED32 PB_LTYPE_FIXED32
849#define PB_LTYPE_MAP_FIXED64 PB_LTYPE_FIXED64
850#define PB_LTYPE_MAP_FLOAT PB_LTYPE_FIXED32
851#define PB_LTYPE_MAP_INT32 PB_LTYPE_VARINT
852#define PB_LTYPE_MAP_INT64 PB_LTYPE_VARINT
853#define PB_LTYPE_MAP_MESSAGE PB_LTYPE_SUBMESSAGE
854#define PB_LTYPE_MAP_MSG_W_CB PB_LTYPE_SUBMSG_W_CB
855#define PB_LTYPE_MAP_SFIXED32 PB_LTYPE_FIXED32
856#define PB_LTYPE_MAP_SFIXED64 PB_LTYPE_FIXED64
857#define PB_LTYPE_MAP_SINT32 PB_LTYPE_SVARINT
858#define PB_LTYPE_MAP_SINT64 PB_LTYPE_SVARINT
859#define PB_LTYPE_MAP_STRING PB_LTYPE_STRING
860#define PB_LTYPE_MAP_UINT32 PB_LTYPE_UVARINT
861#define PB_LTYPE_MAP_UINT64 PB_LTYPE_UVARINT
862#define PB_LTYPE_MAP_EXTENSION PB_LTYPE_EXTENSION
863#define PB_LTYPE_MAP_FIXED_LENGTH_BYTES PB_LTYPE_FIXED_LENGTH_BYTES
864
865/* These macros are used for giving out error messages.
866 * They are mostly a debugging aid; the main error information
867 * is the true/false return value from functions.
868 * Some code space can be saved by disabling the error
869 * messages if not used.
870 *
871 * PB_SET_ERROR() sets the error message if none has been set yet.
872 * msg must be a constant string literal.
873 * PB_GET_ERROR() always returns a pointer to a string.
874 * PB_RETURN_ERROR() sets the error and returns false from current
875 * function.
876 */
877#ifdef PB_NO_ERRMSG
878#define PB_SET_ERROR(stream, msg) PB_UNUSED(stream)
879#define PB_GET_ERROR(stream) "(errmsg disabled)"
880#else
881#define PB_SET_ERROR(stream, msg) (stream->errmsg = (stream)->errmsg ? (stream)->errmsg : (msg))
882#define PB_GET_ERROR(stream) ((stream)->errmsg ? (stream)->errmsg : "(none)")
883#endif
884
885#define PB_RETURN_ERROR(stream, msg) return PB_SET_ERROR(stream, msg), false
886
887#ifdef __cplusplus
888} /* extern "C" */
889#endif
890
891#ifdef __cplusplus
892#if __cplusplus >= 201103L
893#define PB_CONSTEXPR constexpr
894#else // __cplusplus >= 201103L
895#define PB_CONSTEXPR
896#endif // __cplusplus >= 201103L
897
898#if __cplusplus >= 201703L
899#define PB_INLINE_CONSTEXPR inline constexpr
900#else // __cplusplus >= 201703L
901#define PB_INLINE_CONSTEXPR PB_CONSTEXPR
902#endif // __cplusplus >= 201703L
903
904namespace nanopb {
905// Each type will be partially specialized by the generator.
906template <typename GenMessageT> struct MessageDescriptor;
907} // namespace nanopb
908#endif /* __cplusplus */
909
910#endif
pb_bytes_array_s
Definition: pb.h:371
pb_callback_s
Definition: pb.h:396
pb_extension_s
Definition: pb.h:449
pb_extension_type_s
Definition: pb.h:428
pb_field_iter_s
Definition: pb.h:329
pb_istream_s
Definition: pb_decode.h:28
pb_msgdesc_s
Definition: pb.h:316
pb_ostream_s
Definition: pb_encode.h:27
stream
Definition: streams.h:14
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