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Optimized binary encoder.

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pull/13171/head
Joshua Haberman 4 years ago
parent ada28896b9
commit 80441e4eb4
3 changed files with 150 additions and 138 deletions
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  1. 2
      tests/benchmark.cc
  2. 218
      upb/encode.c
  3. 68
      upb/pb/encoder.c

2
tests/benchmark.cc
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@ -83,6 +83,6 @@ static void BM_SerializeDescriptor(benchmark::State& state) {
}
total += size;
}
state.SetBytesProcessed(state.iterations() * descriptor.size);
state.SetBytesProcessed(total);
}
BENCHMARK(BM_SerializeDescriptor);

218
upb/encode.c
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@ -12,10 +12,9 @@
#define UPB_PB_VARINT_MAX_LEN 10
static size_t upb_encode_varint(uint64_t val, char *buf) {
size_t i;
if (val < 128) { buf[0] = val; return 1; }
i = 0;
UPB_NOINLINE
static size_t encode_varint64(uint64_t val, char *buf) {
size_t i = 0;
while (val) {
uint8_t byte = val & 0x7fU;
val >>= 7;
@ -25,8 +24,8 @@ static size_t upb_encode_varint(uint64_t val, char *buf) {
return i;
}
static uint32_t upb_zzencode_32(int32_t n) { return ((uint32_t)n << 1) ^ (n >> 31); }
static uint64_t upb_zzencode_64(int64_t n) { return ((uint64_t)n << 1) ^ (n >> 63); }
static uint32_t encode_zz32(int32_t n) { return ((uint32_t)n << 1) ^ (n >> 31); }
static uint64_t encode_zz64(int64_t n) { return ((uint64_t)n << 1) ^ (n >> 63); }
typedef struct {
jmp_buf err;
@ -44,7 +43,8 @@ static size_t upb_roundup_pow2(size_t bytes) {
UPB_NORETURN static void encode_err(upb_encstate *e) { longjmp(e->err, 1); }
static void upb_encode_growbuffer(upb_encstate *e, size_t bytes) {
UPB_NOINLINE
static void encode_growbuffer(upb_encstate *e, size_t bytes) {
size_t old_size = e->limit - e->buf;
size_t new_size = upb_roundup_pow2(bytes + (e->limit - e->ptr));
char *new_buf = upb_realloc(e->alloc, e->buf, old_size, new_size);
@ -63,92 +63,104 @@ static void upb_encode_growbuffer(upb_encstate *e, size_t bytes) {
/* Call to ensure that at least "bytes" bytes are available for writing at
* e->ptr. Returns false if the bytes could not be allocated. */
static void upb_encode_reserve(upb_encstate *e, size_t bytes) {
UPB_FORCEINLINE
static void encode_reserve(upb_encstate *e, size_t bytes) {
if ((size_t)(e->ptr - e->buf) < bytes) {
upb_encode_growbuffer(e, bytes);
encode_growbuffer(e, bytes);
}
e->ptr -= bytes;
}
/* Writes the given bytes to the buffer, handling reserve/advance. */
static void upb_put_bytes(upb_encstate *e, const void *data, size_t len) {
static void encode_bytes(upb_encstate *e, const void *data, size_t len) {
if (len == 0) return; /* memcpy() with zero size is UB */
upb_encode_reserve(e, len);
encode_reserve(e, len);
memcpy(e->ptr, data, len);
}
static void upb_put_fixed64(upb_encstate *e, uint64_t val) {
static void encode_fixed64(upb_encstate *e, uint64_t val) {
val = _upb_be_swap64(val);
upb_put_bytes(e, &val, sizeof(uint64_t));
encode_bytes(e, &val, sizeof(uint64_t));
}
static void upb_put_fixed32(upb_encstate *e, uint32_t val) {
static void encode_fixed32(upb_encstate *e, uint32_t val) {
val = _upb_be_swap32(val);
upb_put_bytes(e, &val, sizeof(uint32_t));
encode_bytes(e, &val, sizeof(uint32_t));
}
static void upb_put_varint(upb_encstate *e, uint64_t val) {
UPB_NOINLINE
static void encode_longvarint(upb_encstate *e, uint64_t val) {
size_t len;
char *start;
upb_encode_reserve(e, UPB_PB_VARINT_MAX_LEN);
len = upb_encode_varint(val, e->ptr);
encode_reserve(e, UPB_PB_VARINT_MAX_LEN);
len = encode_varint64(val, e->ptr);
start = e->ptr + UPB_PB_VARINT_MAX_LEN - len;
memmove(start, e->ptr, len);
e->ptr = start;
}
static void upb_put_double(upb_encstate *e, double d) {
UPB_FORCEINLINE
static void encode_varint(upb_encstate *e, uint64_t val) {
if (val < 128 && e->ptr != e->buf) {
--e->ptr;
*e->ptr = val;
} else {
encode_longvarint(e, val);
}
}
static void encode_double(upb_encstate *e, double d) {
uint64_t u64;
UPB_ASSERT(sizeof(double) == sizeof(uint64_t));
memcpy(&u64, &d, sizeof(uint64_t));
upb_put_fixed64(e, u64);
encode_fixed64(e, u64);
}
static void upb_put_float(upb_encstate *e, float d) {
static void encode_float(upb_encstate *e, float d) {
uint32_t u32;
UPB_ASSERT(sizeof(float) == sizeof(uint32_t));
memcpy(&u32, &d, sizeof(uint32_t));
upb_put_fixed32(e, u32);
encode_fixed32(e, u32);
}
static void upb_put_tag(upb_encstate *e, int field_number, int wire_type) {
upb_put_varint(e, (field_number << 3) | wire_type);
static void encode_tag(upb_encstate *e, int field_number, int wire_type) {
encode_varint(e, (field_number << 3) | wire_type);
}
static void upb_put_fixedarray(upb_encstate *e, const upb_array *arr,
static void encode_fixedarray(upb_encstate *e, const upb_array *arr,
size_t elem_size, uint32_t tag) {
size_t bytes = arr->len * elem_size;
const char* data = _upb_array_constptr(arr);
const char* ptr = data + bytes - elem_size;
if (tag) {
while (true) {
upb_put_bytes(e, ptr, elem_size);
upb_put_varint(e, tag);
encode_bytes(e, ptr, elem_size);
encode_varint(e, tag);
if (ptr == data) break;
ptr -= elem_size;
}
} else {
upb_put_bytes(e, data, bytes);
upb_put_varint(e, bytes);
encode_bytes(e, data, bytes);
encode_varint(e, bytes);
}
}
static void upb_encode_message(upb_encstate *e, const char *msg,
const upb_msglayout *m, size_t *size);
static void encode_message(upb_encstate *e, const char *msg,
const upb_msglayout *m, size_t *size);
static void upb_encode_scalarfield(upb_encstate *e, const void *_field_mem,
const upb_msglayout *m,
const upb_msglayout_field *f,
bool skip_zero_value) {
static void encode_scalar(upb_encstate *e, const void *_field_mem,
const upb_msglayout *m, const upb_msglayout_field *f,
bool skip_zero_value) {
const char *field_mem = _field_mem;
#define CASE(ctype, type, wire_type, encodeval) do { \
ctype val = *(ctype*)field_mem; \
if (skip_zero_value && val == 0) { \
return; \
} \
upb_put_ ## type(e, encodeval); \
upb_put_tag(e, f->number, wire_type); \
encode_ ## type(e, encodeval); \
encode_tag(e, f->number, wire_type); \
return; \
} while(0)
@ -174,18 +186,18 @@ static void upb_encode_scalarfield(upb_encstate *e, const void *_field_mem,
case UPB_DESCRIPTOR_TYPE_BOOL:
CASE(bool, varint, UPB_WIRE_TYPE_VARINT, val);
case UPB_DESCRIPTOR_TYPE_SINT32:
CASE(int32_t, varint, UPB_WIRE_TYPE_VARINT, upb_zzencode_32(val));
CASE(int32_t, varint, UPB_WIRE_TYPE_VARINT, encode_zz32(val));
case UPB_DESCRIPTOR_TYPE_SINT64:
CASE(int64_t, varint, UPB_WIRE_TYPE_VARINT, upb_zzencode_64(val));
CASE(int64_t, varint, UPB_WIRE_TYPE_VARINT, encode_zz64(val));
case UPB_DESCRIPTOR_TYPE_STRING:
case UPB_DESCRIPTOR_TYPE_BYTES: {
upb_strview view = *(upb_strview*)field_mem;
if (skip_zero_value && view.size == 0) {
return;
}
upb_put_bytes(e, view.data, view.size);
upb_put_varint(e, view.size);
upb_put_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
encode_bytes(e, view.data, view.size);
encode_varint(e, view.size);
encode_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
return;
}
case UPB_DESCRIPTOR_TYPE_GROUP: {
@ -195,9 +207,9 @@ static void upb_encode_scalarfield(upb_encstate *e, const void *_field_mem,
if (submsg == NULL) {
return;
}
upb_put_tag(e, f->number, UPB_WIRE_TYPE_END_GROUP);
upb_encode_message(e, submsg, subm, &size);
upb_put_tag(e, f->number, UPB_WIRE_TYPE_START_GROUP);
encode_tag(e, f->number, UPB_WIRE_TYPE_END_GROUP);
encode_message(e, submsg, subm, &size);
encode_tag(e, f->number, UPB_WIRE_TYPE_START_GROUP);
return;
}
case UPB_DESCRIPTOR_TYPE_MESSAGE: {
@ -207,9 +219,9 @@ static void upb_encode_scalarfield(upb_encstate *e, const void *_field_mem,
if (submsg == NULL) {
return;
}
upb_encode_message(e, submsg, subm, &size);
upb_put_varint(e, size);
upb_put_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
encode_message(e, submsg, subm, &size);
encode_varint(e, size);
encode_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
return;
}
}
@ -217,9 +229,8 @@ static void upb_encode_scalarfield(upb_encstate *e, const void *_field_mem,
UPB_UNREACHABLE();
}
static void upb_encode_array(upb_encstate *e, const char *field_mem,
const upb_msglayout *m,
const upb_msglayout_field *f) {
static void encode_array(upb_encstate *e, const char *field_mem,
const upb_msglayout *m, const upb_msglayout_field *f) {
const upb_array *arr = *(const upb_array**)field_mem;
bool packed = f->label == _UPB_LABEL_PACKED;
@ -235,10 +246,10 @@ static void upb_encode_array(upb_encstate *e, const char *field_mem,
uint32_t tag = packed ? 0 : (f->number << 3) | UPB_WIRE_TYPE_VARINT; \
do { \
ptr--; \
upb_put_varint(e, encode); \
if (tag) upb_put_varint(e, tag); \
encode_varint(e, encode); \
if (tag) encode_varint(e, tag); \
} while (ptr != start); \
if (!tag) upb_put_varint(e, e->limit - e->ptr - pre_len); \
if (!tag) encode_varint(e, e->limit - e->ptr - pre_len); \
} \
break; \
do { \
@ -249,18 +260,18 @@ static void upb_encode_array(upb_encstate *e, const char *field_mem,
switch (f->descriptortype) {
case UPB_DESCRIPTOR_TYPE_DOUBLE:
upb_put_fixedarray(e, arr, sizeof(double), TAG(UPB_WIRE_TYPE_64BIT));
encode_fixedarray(e, arr, sizeof(double), TAG(UPB_WIRE_TYPE_64BIT));
break;
case UPB_DESCRIPTOR_TYPE_FLOAT:
upb_put_fixedarray(e, arr, sizeof(float), TAG(UPB_WIRE_TYPE_32BIT));
encode_fixedarray(e, arr, sizeof(float), TAG(UPB_WIRE_TYPE_32BIT));
break;
case UPB_DESCRIPTOR_TYPE_SFIXED64:
case UPB_DESCRIPTOR_TYPE_FIXED64:
upb_put_fixedarray(e, arr, sizeof(uint64_t), TAG(UPB_WIRE_TYPE_64BIT));
encode_fixedarray(e, arr, sizeof(uint64_t), TAG(UPB_WIRE_TYPE_64BIT));
break;
case UPB_DESCRIPTOR_TYPE_FIXED32:
case UPB_DESCRIPTOR_TYPE_SFIXED32:
upb_put_fixedarray(e, arr, sizeof(uint32_t), TAG(UPB_WIRE_TYPE_32BIT));
encode_fixedarray(e, arr, sizeof(uint32_t), TAG(UPB_WIRE_TYPE_32BIT));
break;
case UPB_DESCRIPTOR_TYPE_INT64:
case UPB_DESCRIPTOR_TYPE_UINT64:
@ -273,18 +284,18 @@ static void upb_encode_array(upb_encstate *e, const char *field_mem,
case UPB_DESCRIPTOR_TYPE_BOOL:
VARINT_CASE(bool, *ptr);
case UPB_DESCRIPTOR_TYPE_SINT32:
VARINT_CASE(int32_t, upb_zzencode_32(*ptr));
VARINT_CASE(int32_t, encode_zz32(*ptr));
case UPB_DESCRIPTOR_TYPE_SINT64:
VARINT_CASE(int64_t, upb_zzencode_64(*ptr));
VARINT_CASE(int64_t, encode_zz64(*ptr));
case UPB_DESCRIPTOR_TYPE_STRING:
case UPB_DESCRIPTOR_TYPE_BYTES: {
const upb_strview *start = _upb_array_constptr(arr);
const upb_strview *ptr = start + arr->len;
do {
ptr--;
upb_put_bytes(e, ptr->data, ptr->size);
upb_put_varint(e, ptr->size);
upb_put_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
encode_bytes(e, ptr->data, ptr->size);
encode_varint(e, ptr->size);
encode_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
} while (ptr != start);
return;
}
@ -295,9 +306,9 @@ static void upb_encode_array(upb_encstate *e, const char *field_mem,
do {
size_t size;
ptr--;
upb_put_tag(e, f->number, UPB_WIRE_TYPE_END_GROUP);
upb_encode_message(e, *ptr, subm, &size);
upb_put_tag(e, f->number, UPB_WIRE_TYPE_START_GROUP);
encode_tag(e, f->number, UPB_WIRE_TYPE_END_GROUP);
encode_message(e, *ptr, subm, &size);
encode_tag(e, f->number, UPB_WIRE_TYPE_START_GROUP);
} while (ptr != start);
return;
}
@ -308,9 +319,9 @@ static void upb_encode_array(upb_encstate *e, const char *field_mem,
do {
size_t size;
ptr--;
upb_encode_message(e, *ptr, subm, &size);
upb_put_varint(e, size);
upb_put_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
encode_message(e, *ptr, subm, &size);
encode_varint(e, size);
encode_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
} while (ptr != start);
return;
}
@ -318,13 +329,12 @@ static void upb_encode_array(upb_encstate *e, const char *field_mem,
#undef VARINT_CASE
if (packed) {
upb_put_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
encode_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
}
}
static void upb_encode_map(upb_encstate *e, const char *field_mem,
const upb_msglayout *m,
const upb_msglayout_field *f) {
static void encode_map(upb_encstate *e, const char *field_mem,
const upb_msglayout *m, const upb_msglayout_field *f) {
const upb_map *map = *(const upb_map**)field_mem;
const upb_msglayout *entry = m->submsgs[f->submsg_index];
const upb_msglayout_field *key_field = &entry->fields[0];
@ -343,51 +353,53 @@ static void upb_encode_map(upb_encstate *e, const char *field_mem,
upb_map_entry ent;
_upb_map_fromkey(key, &ent.k, map->key_size);
_upb_map_fromvalue(val, &ent.v, map->val_size);
upb_encode_scalarfield(e, &ent.v, entry, val_field, false);
upb_encode_scalarfield(e, &ent.k, entry, key_field, false);
encode_scalar(e, &ent.v, entry, val_field, false);
encode_scalar(e, &ent.k, entry, key_field, false);
size = (e->limit - e->ptr) - pre_len;
upb_put_varint(e, size);
upb_put_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
encode_varint(e, size);
encode_tag(e, f->number, UPB_WIRE_TYPE_DELIMITED);
}
}
static void upb_encode_message(upb_encstate *e, const char *msg,
const upb_msglayout *m, size_t *size) {
int i;
static void encode_scalarfield(upb_encstate *e, const char *msg,
const upb_msglayout *m,
const upb_msglayout_field *f) {
bool skip_empty = false;
if (f->presence == 0) {
/* Proto3 presence. */
skip_empty = true;
} else if (f->presence > 0) {
/* Proto2 presence: hasbit. */
if (!_upb_hasbit_field(msg, f)) return;
} else {
/* Field is in a oneof. */
if (_upb_getoneofcase_field(msg, f) != f->number) return;
}
encode_scalar(e, msg + f->offset, m, f, skip_empty);
}
static void encode_message(upb_encstate *e, const char *msg,
const upb_msglayout *m, size_t *size) {
size_t pre_len = e->limit - e->ptr;
const char *unknown;
size_t unknown_size;
const upb_msglayout_field *f = &m->fields[m->field_count];
const upb_msglayout_field *first = &m->fields[0];
unknown = upb_msg_getunknown(msg, &unknown_size);
if (unknown) {
upb_put_bytes(e, unknown, unknown_size);
encode_bytes(e, unknown, unknown_size);
}
for (i = m->field_count - 1; i >= 0; i--) {
const upb_msglayout_field *f = &m->fields[i];
while (f != first) {
f--;
if (_upb_isrepeated(f)) {
upb_encode_array(e, msg + f->offset, m, f);
encode_array(e, msg + f->offset, m, f);
} else if (f->label == _UPB_LABEL_MAP) {
upb_encode_map(e, msg + f->offset, m, f);
encode_map(e, msg + f->offset, m, f);
} else {
bool skip_empty = false;
if (f->presence == 0) {
/* Proto3 presence. */
skip_empty = true;
} else if (f->presence > 0) {
/* Proto2 presence: hasbit. */
if (!_upb_hasbit_field(msg, f)) {
continue;
}
} else {
/* Field is in a oneof. */
if (_upb_getoneofcase_field(msg, f) != f->number) {
continue;
}
}
upb_encode_scalarfield(e, msg + f->offset, m, f, skip_empty);
encode_scalarfield(e, msg, m, f);
}
}
@ -407,7 +419,7 @@ char *upb_encode(const void *msg, const upb_msglayout *m, upb_arena *arena,
return NULL;
}
upb_encode_message(&e, msg, m, size);
encode_message(&e, msg, m, size);
*size = e.limit - e.ptr;

68
upb/pb/encoder.c
Unescape View File

@ -190,7 +190,7 @@ static bool commit(upb_pb_encoder *e) {
}
/* Writes the given bytes to the buffer, handling reserve/advance. */
static bool encode_bytes(upb_pb_encoder *e, const void *data, size_t len) {
static bool encode_bytesval(upb_pb_encoder *e, const void *data, size_t len) {
if (!reserve(e, len)) {
return false;
}
@ -309,24 +309,24 @@ static void new_tag(upb_handlers *h, const upb_fielddef *f, upb_wiretype_t wt,
upb_handlers_addcleanup(h, tag, upb_gfree);
}
static bool encode_tag(upb_pb_encoder *e, const tag_t *tag) {
return encode_bytes(e, tag->tag, tag->bytes);
static bool encode_tagval(upb_pb_encoder *e, const tag_t *tag) {
return encode_bytesval(e, tag->tag, tag->bytes);
}
/* encoding of wire types *****************************************************/
static bool encode_fixed64(upb_pb_encoder *e, uint64_t val) {
static bool doencode_fixed64(upb_pb_encoder *e, uint64_t val) {
/* TODO(haberman): byte-swap for big endian. */
return encode_bytes(e, &val, sizeof(uint64_t));
return encode_bytesval(e, &val, sizeof(uint64_t));
}
static bool encode_fixed32(upb_pb_encoder *e, uint32_t val) {
static bool doencode_fixed32(upb_pb_encoder *e, uint32_t val) {
/* TODO(haberman): byte-swap for big endian. */
return encode_bytes(e, &val, sizeof(uint32_t));
return encode_bytesval(e, &val, sizeof(uint32_t));
}
static bool encode_varint(upb_pb_encoder *e, uint64_t val) {
static bool doencode_varint(upb_pb_encoder *e, uint64_t val) {
if (!reserve(e, UPB_PB_VARINT_MAX_LEN)) {
return false;
}
@ -370,14 +370,14 @@ static bool endmsg(void *c, const void *hd, upb_status *status) {
}
static void *encode_startdelimfield(void *c, const void *hd) {
bool ok = encode_tag(c, hd) && commit(c) && start_delim(c);
bool ok = encode_tagval(c, hd) && commit(c) && start_delim(c);
return ok ? c : UPB_BREAK;
}
static bool encode_unknown(void *c, const void *hd, const char *buf,
size_t len) {
UPB_UNUSED(hd);
return encode_bytes(c, buf, len) && commit(c);
return encode_bytesval(c, buf, len) && commit(c);
}
static bool encode_enddelimfield(void *c, const void *hd) {
@ -386,11 +386,11 @@ static bool encode_enddelimfield(void *c, const void *hd) {
}
static void *encode_startgroup(void *c, const void *hd) {
return (encode_tag(c, hd) && commit(c)) ? c : UPB_BREAK;
return (encode_tagval(c, hd) && commit(c)) ? c : UPB_BREAK;
}
static bool encode_endgroup(void *c, const void *hd) {
return encode_tag(c, hd) && commit(c);
return encode_tagval(c, hd) && commit(c);
}
static void *encode_startstr(void *c, const void *hd, size_t size_hint) {
@ -402,32 +402,32 @@ static size_t encode_strbuf(void *c, const void *hd, const char *buf,
size_t len, const upb_bufhandle *h) {
UPB_UNUSED(hd);
UPB_UNUSED(h);
return encode_bytes(c, buf, len) ? len : 0;
return encode_bytesval(c, buf, len) ? len : 0;
}
#define T(type, ctype, convert, encode) \
static bool encode_scalar_##type(void *e, const void *hd, ctype val) { \
return encode_tag(e, hd) && encode(e, (convert)(val)) && commit(e); \
} \
static bool encode_packed_##type(void *e, const void *hd, ctype val) { \
UPB_UNUSED(hd); \
return encode(e, (convert)(val)); \
#define T(type, ctype, convert, encode) \
static bool encode_scalar_##type(void *e, const void *hd, ctype val) { \
return encode_tagval(e, hd) && encode(e, (convert)(val)) && commit(e); \
} \
static bool encode_packed_##type(void *e, const void *hd, ctype val) { \
UPB_UNUSED(hd); \
return encode(e, (convert)(val)); \
}
T(double, double, dbl2uint64, encode_fixed64)
T(float, float, flt2uint32, encode_fixed32)
T(int64, int64_t, uint64_t, encode_varint)
T(int32, int32_t, int64_t, encode_varint)
T(fixed64, uint64_t, uint64_t, encode_fixed64)
T(fixed32, uint32_t, uint32_t, encode_fixed32)
T(bool, bool, bool, encode_varint)
T(uint32, uint32_t, uint32_t, encode_varint)
T(uint64, uint64_t, uint64_t, encode_varint)
T(enum, int32_t, uint32_t, encode_varint)
T(sfixed32, int32_t, uint32_t, encode_fixed32)
T(sfixed64, int64_t, uint64_t, encode_fixed64)
T(sint32, int32_t, upb_zzenc_32, encode_varint)
T(sint64, int64_t, upb_zzenc_64, encode_varint)
T(double, double, dbl2uint64, doencode_fixed64)
T(float, float, flt2uint32, doencode_fixed32)
T(int64, int64_t, uint64_t, doencode_varint)
T(int32, int32_t, int64_t, doencode_varint)
T(fixed64, uint64_t, uint64_t, doencode_fixed64)
T(fixed32, uint32_t, uint32_t, doencode_fixed32)
T(bool, bool, bool, doencode_varint)
T(uint32, uint32_t, uint32_t, doencode_varint)
T(uint64, uint64_t, uint64_t, doencode_varint)
T(enum, int32_t, uint32_t, doencode_varint)
T(sfixed32, int32_t, uint32_t, doencode_fixed32)
T(sfixed64, int64_t, uint64_t, doencode_fixed64)
T(sint32, int32_t, upb_zzenc_32, doencode_varint)
T(sint64, int64_t, upb_zzenc_64, doencode_varint)
#undef T

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