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protobuf/upb/def.c

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#include "upb/def.h"
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include "google/protobuf/descriptor.upb.h"
#include "upb/port_def.inc"
typedef struct {
size_t len;
char str[1]; /* Null-terminated string data follows. */
} str_t;
static str_t *newstr(upb_alloc *alloc, const char *data, size_t len) {
str_t *ret = upb_malloc(alloc, sizeof(*ret) + len);
if (!ret) return NULL;
ret->len = len;
memcpy(ret->str, data, len);
ret->str[len] = '\0';
return ret;
}
struct upb_fielddef {
const upb_filedef *file;
const upb_msgdef *msgdef;
const char *full_name;
union {
int64_t sint;
uint64_t uint;
double dbl;
float flt;
bool boolean;
str_t *str;
} defaultval;
const upb_oneofdef *oneof;
union {
const upb_msgdef *msgdef;
const upb_enumdef *enumdef;
const google_protobuf_FieldDescriptorProto *unresolved;
} sub;
uint32_t number_;
uint16_t index_;
uint16_t layout_index;
uint32_t selector_base; /* Used to index into a upb::Handlers table. */
bool is_extension_;
bool lazy_;
bool packed_;
upb_descriptortype_t type_;
upb_label_t label_;
};
struct upb_msgdef {
const upb_msglayout *layout;
const upb_filedef *file;
const char *full_name;
uint32_t selector_count;
uint32_t submsg_field_count;
/* Tables for looking up fields by number and name. */
upb_inttable itof;
upb_strtable ntof;
const upb_fielddef *fields;
const upb_oneofdef *oneofs;
int field_count;
int oneof_count;
/* Is this a map-entry message? */
bool map_entry;
upb_wellknowntype_t well_known_type;
/* TODO(haberman): proper extension ranges (there can be multiple). */
};
struct upb_enumdef {
const upb_filedef *file;
const char *full_name;
upb_strtable ntoi;
upb_inttable iton;
int32_t defaultval;
};
struct upb_oneofdef {
const upb_msgdef *parent;
const char *full_name;
uint32_t index;
upb_strtable ntof;
upb_inttable itof;
};
struct upb_filedef {
const char *name;
const char *package;
const char *phpprefix;
const char *phpnamespace;
upb_syntax_t syntax;
const upb_filedef **deps;
const upb_msgdef *msgs;
const upb_enumdef *enums;
const upb_fielddef *exts;
int dep_count;
int msg_count;
int enum_count;
int ext_count;
};
struct upb_symtab {
upb_arena *arena;
upb_strtable syms; /* full_name -> packed def ptr */
upb_strtable files; /* file_name -> upb_filedef* */
};
/* Inside a symtab we store tagged pointers to specific def types. */
typedef enum {
UPB_DEFTYPE_MSG = 0,
UPB_DEFTYPE_ENUM = 1,
UPB_DEFTYPE_FIELD = 2,
UPB_DEFTYPE_ONEOF = 3
} upb_deftype_t;
static const void *unpack_def(upb_value v, upb_deftype_t type) {
uintptr_t num = (uintptr_t)upb_value_getconstptr(v);
return (num & 3) == type ? (const void*)(num & ~3) : NULL;
}
static upb_value pack_def(const void *ptr, upb_deftype_t type) {
uintptr_t num = (uintptr_t)ptr | type;
return upb_value_constptr((const void*)num);
}
/* isalpha() etc. from <ctype.h> are locale-dependent, which we don't want. */
static bool upb_isbetween(char c, char low, char high) {
return c >= low && c <= high;
}
static bool upb_isletter(char c) {
return upb_isbetween(c, 'A', 'Z') || upb_isbetween(c, 'a', 'z') || c == '_';
}
static bool upb_isalphanum(char c) {
return upb_isletter(c) || upb_isbetween(c, '0', '9');
}
static bool upb_isident(upb_strview name, bool full, upb_status *s) {
const char *str = name.data;
size_t len = name.size;
bool start = true;
size_t i;
for (i = 0; i < len; i++) {
char c = str[i];
if (c == '.') {
if (start || !full) {
upb_status_seterrf(s, "invalid name: unexpected '.' (%s)", str);
return false;
}
start = true;
} else if (start) {
if (!upb_isletter(c)) {
upb_status_seterrf(
s, "invalid name: path components must start with a letter (%s)",
str);
return false;
}
start = false;
} else {
if (!upb_isalphanum(c)) {
upb_status_seterrf(s, "invalid name: non-alphanumeric character (%s)",
str);
return false;
}
}
}
return !start;
}
static const char *shortdefname(const char *fullname) {
const char *p;
if (fullname == NULL) {
return NULL;
} else if ((p = strrchr(fullname, '.')) == NULL) {
/* No '.' in the name, return the full string. */
return fullname;
} else {
/* Return one past the last '.'. */
return p + 1;
}
}
/* All submessage fields are lower than all other fields.
* Secondly, fields are increasing in order. */
uint32_t field_rank(const upb_fielddef *f) {
uint32_t ret = upb_fielddef_number(f);
const uint32_t high_bit = 1 << 30;
UPB_ASSERT(ret < high_bit);
if (!upb_fielddef_issubmsg(f))
ret |= high_bit;
return ret;
}
int cmp_fields(const void *p1, const void *p2) {
const upb_fielddef *f1 = *(upb_fielddef*const*)p1;
const upb_fielddef *f2 = *(upb_fielddef*const*)p2;
return field_rank(f1) - field_rank(f2);
}
/* A few implementation details of handlers. We put these here to avoid
* a def -> handlers dependency. */
#define UPB_STATIC_SELECTOR_COUNT 3 /* Warning: also in upb/handlers.h. */
static uint32_t upb_handlers_selectorbaseoffset(const upb_fielddef *f) {
return upb_fielddef_isseq(f) ? 2 : 0;
}
static uint32_t upb_handlers_selectorcount(const upb_fielddef *f) {
uint32_t ret = 1;
if (upb_fielddef_isseq(f)) ret += 2; /* STARTSEQ/ENDSEQ */
if (upb_fielddef_isstring(f)) ret += 2; /* [STRING]/STARTSTR/ENDSTR */
if (upb_fielddef_issubmsg(f)) {
/* ENDSUBMSG (STARTSUBMSG is at table beginning) */
ret += 0;
if (upb_fielddef_lazy(f)) {
/* STARTSTR/ENDSTR/STRING (for lazy) */
ret += 3;
}
}
return ret;
}
static bool assign_msg_indices(upb_msgdef *m, upb_status *s) {
/* Sort fields. upb internally relies on UPB_TYPE_MESSAGE fields having the
* lowest indexes, but we do not publicly guarantee this. */
upb_msg_field_iter j;
upb_msg_oneof_iter k;
int i;
uint32_t selector;
int n = upb_msgdef_numfields(m);
upb_fielddef **fields;
if (n == 0) {
m->selector_count = UPB_STATIC_SELECTOR_COUNT;
m->submsg_field_count = 0;
return true;
}
fields = upb_gmalloc(n * sizeof(*fields));
if (!fields) {
upb_status_setoom(s);
return false;
}
m->submsg_field_count = 0;
for(i = 0, upb_msg_field_begin(&j, m);
!upb_msg_field_done(&j);
upb_msg_field_next(&j), i++) {
upb_fielddef *f = upb_msg_iter_field(&j);
UPB_ASSERT(f->msgdef == m);
if (upb_fielddef_issubmsg(f)) {
m->submsg_field_count++;
}
fields[i] = f;
}
qsort(fields, n, sizeof(*fields), cmp_fields);
selector = UPB_STATIC_SELECTOR_COUNT + m->submsg_field_count;
for (i = 0; i < n; i++) {
upb_fielddef *f = fields[i];
f->index_ = i;
f->selector_base = selector + upb_handlers_selectorbaseoffset(f);
selector += upb_handlers_selectorcount(f);
}
m->selector_count = selector;
for(upb_msg_oneof_begin(&k, m), i = 0;
!upb_msg_oneof_done(&k);
upb_msg_oneof_next(&k), i++) {
upb_oneofdef *o = (upb_oneofdef*)upb_msg_iter_oneof(&k);
o->index = i;
}
upb_gfree(fields);
return true;
}
static void assign_msg_wellknowntype(upb_msgdef *m) {
const char *name = upb_msgdef_fullname(m);
if (name == NULL) {
m->well_known_type = UPB_WELLKNOWN_UNSPECIFIED;
return;
}
if (!strcmp(name, "google.protobuf.Any")) {
m->well_known_type = UPB_WELLKNOWN_ANY;
} else if (!strcmp(name, "google.protobuf.FieldMask")) {
m->well_known_type = UPB_WELLKNOWN_FIELDMASK;
} else if (!strcmp(name, "google.protobuf.Duration")) {
m->well_known_type = UPB_WELLKNOWN_DURATION;
} else if (!strcmp(name, "google.protobuf.Timestamp")) {
m->well_known_type = UPB_WELLKNOWN_TIMESTAMP;
} else if (!strcmp(name, "google.protobuf.DoubleValue")) {
m->well_known_type = UPB_WELLKNOWN_DOUBLEVALUE;
} else if (!strcmp(name, "google.protobuf.FloatValue")) {
m->well_known_type = UPB_WELLKNOWN_FLOATVALUE;
} else if (!strcmp(name, "google.protobuf.Int64Value")) {
m->well_known_type = UPB_WELLKNOWN_INT64VALUE;
} else if (!strcmp(name, "google.protobuf.UInt64Value")) {
m->well_known_type = UPB_WELLKNOWN_UINT64VALUE;
} else if (!strcmp(name, "google.protobuf.Int32Value")) {
m->well_known_type = UPB_WELLKNOWN_INT32VALUE;
} else if (!strcmp(name, "google.protobuf.UInt32Value")) {
m->well_known_type = UPB_WELLKNOWN_UINT32VALUE;
} else if (!strcmp(name, "google.protobuf.BoolValue")) {
m->well_known_type = UPB_WELLKNOWN_BOOLVALUE;
} else if (!strcmp(name, "google.protobuf.StringValue")) {
m->well_known_type = UPB_WELLKNOWN_STRINGVALUE;
} else if (!strcmp(name, "google.protobuf.BytesValue")) {
m->well_known_type = UPB_WELLKNOWN_BYTESVALUE;
} else if (!strcmp(name, "google.protobuf.Value")) {
m->well_known_type = UPB_WELLKNOWN_VALUE;
} else if (!strcmp(name, "google.protobuf.ListValue")) {
m->well_known_type = UPB_WELLKNOWN_LISTVALUE;
} else if (!strcmp(name, "google.protobuf.Struct")) {
m->well_known_type = UPB_WELLKNOWN_STRUCT;
} else {
m->well_known_type = UPB_WELLKNOWN_UNSPECIFIED;
}
}
/* upb_enumdef ****************************************************************/
const char *upb_enumdef_fullname(const upb_enumdef *e) {
return e->full_name;
}
const char *upb_enumdef_name(const upb_enumdef *e) {
return shortdefname(e->full_name);
}
const upb_filedef *upb_enumdef_file(const upb_enumdef *e) {
return e->file;
}
int32_t upb_enumdef_default(const upb_enumdef *e) {
UPB_ASSERT(upb_enumdef_iton(e, e->defaultval));
return e->defaultval;
}
int upb_enumdef_numvals(const upb_enumdef *e) {
return upb_strtable_count(&e->ntoi);
}
void upb_enum_begin(upb_enum_iter *i, const upb_enumdef *e) {
/* We iterate over the ntoi table, to account for duplicate numbers. */
upb_strtable_begin(i, &e->ntoi);
}
void upb_enum_next(upb_enum_iter *iter) { upb_strtable_next(iter); }
bool upb_enum_done(upb_enum_iter *iter) { return upb_strtable_done(iter); }
bool upb_enumdef_ntoi(const upb_enumdef *def, const char *name,
size_t len, int32_t *num) {
upb_value v;
if (!upb_strtable_lookup2(&def->ntoi, name, len, &v)) {
return false;
}
if (num) *num = upb_value_getint32(v);
return true;
}
const char *upb_enumdef_iton(const upb_enumdef *def, int32_t num) {
upb_value v;
return upb_inttable_lookup32(&def->iton, num, &v) ?
upb_value_getcstr(v) : NULL;
}
const char *upb_enum_iter_name(upb_enum_iter *iter) {
return upb_strtable_iter_key(iter).data;
}
int32_t upb_enum_iter_number(upb_enum_iter *iter) {
return upb_value_getint32(upb_strtable_iter_value(iter));
}
/* upb_fielddef ***************************************************************/
const char *upb_fielddef_fullname(const upb_fielddef *f) {
return f->full_name;
}
upb_fieldtype_t upb_fielddef_type(const upb_fielddef *f) {
switch (f->type_) {
case UPB_DESCRIPTOR_TYPE_DOUBLE:
return UPB_TYPE_DOUBLE;
case UPB_DESCRIPTOR_TYPE_FLOAT:
return UPB_TYPE_FLOAT;
case UPB_DESCRIPTOR_TYPE_INT64:
case UPB_DESCRIPTOR_TYPE_SINT64:
case UPB_DESCRIPTOR_TYPE_SFIXED64:
return UPB_TYPE_INT64;
case UPB_DESCRIPTOR_TYPE_INT32:
case UPB_DESCRIPTOR_TYPE_SFIXED32:
case UPB_DESCRIPTOR_TYPE_SINT32:
return UPB_TYPE_INT32;
case UPB_DESCRIPTOR_TYPE_UINT64:
case UPB_DESCRIPTOR_TYPE_FIXED64:
return UPB_TYPE_UINT64;
case UPB_DESCRIPTOR_TYPE_UINT32:
case UPB_DESCRIPTOR_TYPE_FIXED32:
return UPB_TYPE_UINT32;
case UPB_DESCRIPTOR_TYPE_ENUM:
return UPB_TYPE_ENUM;
case UPB_DESCRIPTOR_TYPE_BOOL:
return UPB_TYPE_BOOL;
case UPB_DESCRIPTOR_TYPE_STRING:
return UPB_TYPE_STRING;
case UPB_DESCRIPTOR_TYPE_BYTES:
return UPB_TYPE_BYTES;
case UPB_DESCRIPTOR_TYPE_GROUP:
case UPB_DESCRIPTOR_TYPE_MESSAGE:
return UPB_TYPE_MESSAGE;
}
UPB_UNREACHABLE();
}
upb_descriptortype_t upb_fielddef_descriptortype(const upb_fielddef *f) {
return f->type_;
}
uint32_t upb_fielddef_index(const upb_fielddef *f) {
return f->index_;
}
upb_label_t upb_fielddef_label(const upb_fielddef *f) {
return f->label_;
}
uint32_t upb_fielddef_number(const upb_fielddef *f) {
return f->number_;
}
bool upb_fielddef_isextension(const upb_fielddef *f) {
return f->is_extension_;
}
bool upb_fielddef_lazy(const upb_fielddef *f) {
return f->lazy_;
}
bool upb_fielddef_packed(const upb_fielddef *f) {
return f->packed_;
}
const char *upb_fielddef_name(const upb_fielddef *f) {
return shortdefname(f->full_name);
}
uint32_t upb_fielddef_selectorbase(const upb_fielddef *f) {
return f->selector_base;
}
size_t upb_fielddef_getjsonname(const upb_fielddef *f, char *buf, size_t len) {
const char *name = upb_fielddef_name(f);
size_t src, dst = 0;
bool ucase_next = false;
#define WRITE(byte) \
++dst; \
if (dst < len) buf[dst - 1] = byte; \
else if (dst == len) buf[dst - 1] = '\0'
if (!name) {
WRITE('\0');
return 0;
}
/* Implement the transformation as described in the spec:
* 1. upper case all letters after an underscore.
* 2. remove all underscores.
*/
for (src = 0; name[src]; src++) {
if (name[src] == '_') {
ucase_next = true;
continue;
}
if (ucase_next) {
WRITE(toupper(name[src]));
ucase_next = false;
} else {
WRITE(name[src]);
}
}
WRITE('\0');
return dst;
#undef WRITE
}
const upb_msgdef *upb_fielddef_containingtype(const upb_fielddef *f) {
return f->msgdef;
}
const upb_oneofdef *upb_fielddef_containingoneof(const upb_fielddef *f) {
return f->oneof;
}
static void chkdefaulttype(const upb_fielddef *f, int ctype) {
UPB_UNUSED(f);
UPB_UNUSED(ctype);
}
int64_t upb_fielddef_defaultint64(const upb_fielddef *f) {
chkdefaulttype(f, UPB_TYPE_INT64);
return f->defaultval.sint;
}
int32_t upb_fielddef_defaultint32(const upb_fielddef *f) {
chkdefaulttype(f, UPB_TYPE_INT32);
return f->defaultval.sint;
}
uint64_t upb_fielddef_defaultuint64(const upb_fielddef *f) {
chkdefaulttype(f, UPB_TYPE_UINT64);
return f->defaultval.uint;
}
uint32_t upb_fielddef_defaultuint32(const upb_fielddef *f) {
chkdefaulttype(f, UPB_TYPE_UINT32);
return f->defaultval.uint;
}
bool upb_fielddef_defaultbool(const upb_fielddef *f) {
chkdefaulttype(f, UPB_TYPE_BOOL);
return f->defaultval.boolean;
}
float upb_fielddef_defaultfloat(const upb_fielddef *f) {
chkdefaulttype(f, UPB_TYPE_FLOAT);
return f->defaultval.flt;
}
double upb_fielddef_defaultdouble(const upb_fielddef *f) {
chkdefaulttype(f, UPB_TYPE_DOUBLE);
return f->defaultval.dbl;
}
const char *upb_fielddef_defaultstr(const upb_fielddef *f, size_t *len) {
str_t *str = f->defaultval.str;
UPB_ASSERT(upb_fielddef_type(f) == UPB_TYPE_STRING ||
upb_fielddef_type(f) == UPB_TYPE_BYTES ||
upb_fielddef_type(f) == UPB_TYPE_ENUM);
if (str) {
if (len) *len = str->len;
return str->str;
} else {
if (len) *len = 0;
return NULL;
}
}
const upb_msgdef *upb_fielddef_msgsubdef(const upb_fielddef *f) {
UPB_ASSERT(upb_fielddef_type(f) == UPB_TYPE_MESSAGE);
return f->sub.msgdef;
}
const upb_enumdef *upb_fielddef_enumsubdef(const upb_fielddef *f) {
UPB_ASSERT(upb_fielddef_type(f) == UPB_TYPE_ENUM);
return f->sub.enumdef;
}
const upb_msglayout_field *upb_fielddef_layout(const upb_fielddef *f) {
return &f->containing_type->layout->fields[f->layout_index];
}
bool upb_fielddef_issubmsg(const upb_fielddef *f) {
return upb_fielddef_type(f) == UPB_TYPE_MESSAGE;
}
bool upb_fielddef_isstring(const upb_fielddef *f) {
return upb_fielddef_type(f) == UPB_TYPE_STRING ||
upb_fielddef_type(f) == UPB_TYPE_BYTES;
}
bool upb_fielddef_isseq(const upb_fielddef *f) {
return upb_fielddef_label(f) == UPB_LABEL_REPEATED;
}
bool upb_fielddef_isprimitive(const upb_fielddef *f) {
return !upb_fielddef_isstring(f) && !upb_fielddef_issubmsg(f);
}
bool upb_fielddef_ismap(const upb_fielddef *f) {
return upb_fielddef_isseq(f) && upb_fielddef_issubmsg(f) &&
upb_msgdef_mapentry(upb_fielddef_msgsubdef(f));
}
bool upb_fielddef_hassubdef(const upb_fielddef *f) {
return upb_fielddef_issubmsg(f) || upb_fielddef_type(f) == UPB_TYPE_ENUM;
}
bool upb_fielddef_haspresence(const upb_fielddef *f) {
if (upb_fielddef_isseq(f)) return false;
if (upb_fielddef_issubmsg(f)) return true;
return f->file->syntax == UPB_SYNTAX_PROTO2;
}
static bool between(int32_t x, int32_t low, int32_t high) {
return x >= low && x <= high;
}
bool upb_fielddef_checklabel(int32_t label) { return between(label, 1, 3); }
bool upb_fielddef_checktype(int32_t type) { return between(type, 1, 11); }
bool upb_fielddef_checkintfmt(int32_t fmt) { return between(fmt, 1, 3); }
bool upb_fielddef_checkdescriptortype(int32_t type) {
return between(type, 1, 18);
}
/* upb_msgdef *****************************************************************/
const char *upb_msgdef_fullname(const upb_msgdef *m) {
return m->full_name;
}
const upb_filedef *upb_msgdef_file(const upb_msgdef *m) {
return m->file;
}
const char *upb_msgdef_name(const upb_msgdef *m) {
return shortdefname(m->full_name);
}
upb_syntax_t upb_msgdef_syntax(const upb_msgdef *m) {
return m->file->syntax;
}
size_t upb_msgdef_selectorcount(const upb_msgdef *m) {
return m->selector_count;
}
uint32_t upb_msgdef_submsgfieldcount(const upb_msgdef *m) {
return m->submsg_field_count;
}
const upb_fielddef *upb_msgdef_itof(const upb_msgdef *m, uint32_t i) {
upb_value val;
return upb_inttable_lookup32(&m->itof, i, &val) ?
upb_value_getconstptr(val) : NULL;
}
const upb_fielddef *upb_msgdef_ntof(const upb_msgdef *m, const char *name,
size_t len) {
upb_value val;
if (!upb_strtable_lookup2(&m->ntof, name, len, &val)) {
return NULL;
}
return unpack_def(val, UPB_DEFTYPE_FIELD);
}
const upb_oneofdef *upb_msgdef_ntoo(const upb_msgdef *m, const char *name,
size_t len) {
upb_value val;
if (!upb_strtable_lookup2(&m->ntof, name, len, &val)) {
return NULL;
}
return unpack_def(val, UPB_DEFTYPE_ONEOF);
}
bool upb_msgdef_lookupname(const upb_msgdef *m, const char *name, size_t len,
const upb_fielddef **f, const upb_oneofdef **o) {
upb_value val;
if (!upb_strtable_lookup2(&m->ntof, name, len, &val)) {
return false;
}
*o = unpack_def(val, UPB_DEFTYPE_ONEOF);
*f = unpack_def(val, UPB_DEFTYPE_FIELD);
UPB_ASSERT((*o != NULL) ^ (*f != NULL)); /* Exactly one of the two should be set. */
return true;
}
int upb_msgdef_numfields(const upb_msgdef *m) {
/* The number table contains only fields. */
return upb_inttable_count(&m->itof);
}
int upb_msgdef_numoneofs(const upb_msgdef *m) {
/* The name table includes oneofs, and the number table does not. */
return upb_strtable_count(&m->ntof) - upb_inttable_count(&m->itof);
}
const upb_msglayout *upb_msgdef_layout(const upb_msgdef *m) {
return m->layout;
}
bool upb_msgdef_mapentry(const upb_msgdef *m) {
return m->map_entry;
}
upb_wellknowntype_t upb_msgdef_wellknowntype(const upb_msgdef *m) {
return m->well_known_type;
}
bool upb_msgdef_isnumberwrapper(const upb_msgdef *m) {
upb_wellknowntype_t type = upb_msgdef_wellknowntype(m);
return type >= UPB_WELLKNOWN_DOUBLEVALUE &&
type <= UPB_WELLKNOWN_UINT32VALUE;
}
void upb_msg_field_begin(upb_msg_field_iter *iter, const upb_msgdef *m) {
upb_inttable_begin(iter, &m->itof);
}
void upb_msg_field_next(upb_msg_field_iter *iter) { upb_inttable_next(iter); }
bool upb_msg_field_done(const upb_msg_field_iter *iter) {
return upb_inttable_done(iter);
}
upb_fielddef *upb_msg_iter_field(const upb_msg_field_iter *iter) {
return (upb_fielddef *)upb_value_getconstptr(upb_inttable_iter_value(iter));
}
void upb_msg_field_iter_setdone(upb_msg_field_iter *iter) {
upb_inttable_iter_setdone(iter);
}
bool upb_msg_field_iter_isequal(const upb_msg_field_iter * iter1,
const upb_msg_field_iter * iter2) {
return upb_inttable_iter_isequal(iter1, iter2);
}
void upb_msg_oneof_begin(upb_msg_oneof_iter *iter, const upb_msgdef *m) {
upb_strtable_begin(iter, &m->ntof);
/* We need to skip past any initial fields. */
while (!upb_strtable_done(iter) &&
!unpack_def(upb_strtable_iter_value(iter), UPB_DEFTYPE_ONEOF)) {
upb_strtable_next(iter);
}
}
void upb_msg_oneof_next(upb_msg_oneof_iter *iter) {
/* We need to skip past fields to return only oneofs. */
do {
upb_strtable_next(iter);
} while (!upb_strtable_done(iter) &&
!unpack_def(upb_strtable_iter_value(iter), UPB_DEFTYPE_ONEOF));
}
bool upb_msg_oneof_done(const upb_msg_oneof_iter *iter) {
return upb_strtable_done(iter);
}
const upb_oneofdef *upb_msg_iter_oneof(const upb_msg_oneof_iter *iter) {
return unpack_def(upb_strtable_iter_value(iter), UPB_DEFTYPE_ONEOF);
}
void upb_msg_oneof_iter_setdone(upb_msg_oneof_iter *iter) {
upb_strtable_iter_setdone(iter);
}
bool upb_msg_oneof_iter_isequal(const upb_msg_oneof_iter *iter1,
const upb_msg_oneof_iter *iter2) {
return upb_strtable_iter_isequal(iter1, iter2);
}
/* upb_oneofdef ***************************************************************/
const char *upb_oneofdef_name(const upb_oneofdef *o) {
return shortdefname(o->full_name);
}
const upb_msgdef *upb_oneofdef_containingtype(const upb_oneofdef *o) {
return o->parent;
}
int upb_oneofdef_numfields(const upb_oneofdef *o) {
return upb_strtable_count(&o->ntof);
}
uint32_t upb_oneofdef_index(const upb_oneofdef *o) {
return o->index;
}
const upb_fielddef *upb_oneofdef_ntof(const upb_oneofdef *o,
const char *name, size_t length) {
upb_value val;
return upb_strtable_lookup2(&o->ntof, name, length, &val) ?
upb_value_getptr(val) : NULL;
}
const upb_fielddef *upb_oneofdef_itof(const upb_oneofdef *o, uint32_t num) {
upb_value val;
return upb_inttable_lookup32(&o->itof, num, &val) ?
upb_value_getptr(val) : NULL;
}
void upb_oneof_begin(upb_oneof_iter *iter, const upb_oneofdef *o) {
upb_inttable_begin(iter, &o->itof);
}
void upb_oneof_next(upb_oneof_iter *iter) {
upb_inttable_next(iter);
}
bool upb_oneof_done(upb_oneof_iter *iter) {
return upb_inttable_done(iter);
}
upb_fielddef *upb_oneof_iter_field(const upb_oneof_iter *iter) {
return (upb_fielddef *)upb_value_getconstptr(upb_inttable_iter_value(iter));
}
void upb_oneof_iter_setdone(upb_oneof_iter *iter) {
upb_inttable_iter_setdone(iter);
}
/* Dynamic Layout Generation. *************************************************/
static bool is_power_of_two(size_t val) {
return (val & (val - 1)) == 0;
}
/* Align up to the given power of 2. */
static size_t align_up(size_t val, size_t align) {
UPB_ASSERT(is_power_of_two(align));
return (val + align - 1) & ~(align - 1);
}
static size_t div_round_up(size_t n, size_t d) {
return (n + d - 1) / d;
}
static size_t upb_msgval_sizeof2(upb_fieldtype_t type) {
switch (type) {
case UPB_TYPE_DOUBLE:
case UPB_TYPE_INT64:
case UPB_TYPE_UINT64:
return 8;
case UPB_TYPE_ENUM:
case UPB_TYPE_INT32:
case UPB_TYPE_UINT32:
case UPB_TYPE_FLOAT:
return 4;
case UPB_TYPE_BOOL:
return 1;
case UPB_TYPE_MESSAGE:
return sizeof(void*);
case UPB_TYPE_BYTES:
case UPB_TYPE_STRING:
return sizeof(upb_strview);
}
UPB_UNREACHABLE();
}
static uint8_t upb_msg_fielddefsize(const upb_fielddef *f) {
if (upb_fielddef_isseq(f)) {
return sizeof(void*);
} else {
return upb_msgval_sizeof2(upb_fielddef_type(f));
}
}
static size_t upb_msglayout_place(upb_msglayout *l, size_t size) {
size_t ret;
l->size = align_up(l->size, size);
ret = l->size;
l->size += size;
return ret;
}
static bool make_layout(const upb_symtab *symtab, const upb_msgdef *m) {
upb_msglayout *l = (upb_msglayout*)m->layout;
upb_msg_field_iter it;
upb_msg_oneof_iter oit;
size_t hasbit;
size_t submsg_count = m->submsg_field_count;
const upb_msglayout **submsgs;
upb_msglayout_field *fields;
upb_alloc *alloc = upb_arena_alloc(symtab->arena);
memset(l, 0, sizeof(*l));
fields = upb_malloc(alloc, upb_msgdef_numfields(m) * sizeof(*fields));
submsgs = upb_malloc(alloc, submsg_count * sizeof(*submsgs));
if ((!fields && upb_msgdef_numfields(m)) ||
(!submsgs && submsg_count)) {
/* OOM. */
return false;
}
l->field_count = upb_msgdef_numfields(m);
l->fields = fields;
l->submsgs = submsgs;
/* Allocate data offsets in three stages:
*
* 1. hasbits.
* 2. regular fields.
* 3. oneof fields.
*
* OPT: There is a lot of room for optimization here to minimize the size.
*/
/* Allocate hasbits and set basic field attributes. */
submsg_count = 0;
for (upb_msg_field_begin(&it, m), hasbit = 0;
!upb_msg_field_done(&it);
upb_msg_field_next(&it)) {
const upb_fielddef* f = upb_msg_iter_field(&it);
upb_msglayout_field *field = &fields[upb_fielddef_index(f)];
field->number = upb_fielddef_number(f);
field->descriptortype = upb_fielddef_descriptortype(f);
field->label = upb_fielddef_label(f);
if (upb_fielddef_issubmsg(f)) {
const upb_msgdef *subm = upb_fielddef_msgsubdef(f);
field->submsg_index = submsg_count++;
submsgs[field->submsg_index] = subm->layout;
}
if (upb_fielddef_haspresence(f) && !upb_fielddef_containingoneof(f)) {
field->presence = (hasbit++);
} else {
field->presence = 0;
}
}
/* Account for space used by hasbits. */
l->size = div_round_up(hasbit, 8);
/* Allocate non-oneof fields. */
for (upb_msg_field_begin(&it, m); !upb_msg_field_done(&it);
upb_msg_field_next(&it)) {
const upb_fielddef* f = upb_msg_iter_field(&it);
size_t field_size = upb_msg_fielddefsize(f);
size_t index = upb_fielddef_index(f);
if (upb_fielddef_containingoneof(f)) {
/* Oneofs are handled separately below. */
continue;
}
fields[index].offset = upb_msglayout_place(l, field_size);
}
/* Allocate oneof fields. Each oneof field consists of a uint32 for the case
* and space for the actual data. */
for (upb_msg_oneof_begin(&oit, m); !upb_msg_oneof_done(&oit);
upb_msg_oneof_next(&oit)) {
const upb_oneofdef* o = upb_msg_iter_oneof(&oit);
upb_oneof_iter fit;
size_t case_size = sizeof(uint32_t); /* Could potentially optimize this. */
size_t field_size = 0;
uint32_t case_offset;
uint32_t data_offset;
/* Calculate field size: the max of all field sizes. */
for (upb_oneof_begin(&fit, o);
!upb_oneof_done(&fit);
upb_oneof_next(&fit)) {
const upb_fielddef* f = upb_oneof_iter_field(&fit);
field_size = UPB_MAX(field_size, upb_msg_fielddefsize(f));
}
/* Align and allocate case offset. */
case_offset = upb_msglayout_place(l, case_size);
data_offset = upb_msglayout_place(l, field_size);
for (upb_oneof_begin(&fit, o);
!upb_oneof_done(&fit);
upb_oneof_next(&fit)) {
const upb_fielddef* f = upb_oneof_iter_field(&fit);
fields[upb_fielddef_index(f)].offset = data_offset;
fields[upb_fielddef_index(f)].presence = ~case_offset;
}
}
/* Size of the entire structure should be a multiple of its greatest
* alignment. TODO: track overall alignment for real? */
l->size = align_up(l->size, 8);
return true;
}
/* Code to build defs from descriptor protos. *********************************/
/* There is a question of how much validation to do here. It will be difficult
* to perfectly match the amount of validation performed by proto2. But since
* this code is used to directly build defs from Ruby (for example) we do need
* to validate important constraints like uniqueness of names and numbers. */
#define CHK(x) if (!(x)) { return false; }
#define CHK_OOM(x) if (!(x)) { upb_status_setoom(ctx->status); return false; }
typedef struct {
const upb_symtab *symtab;
upb_filedef *file; /* File we are building. */
upb_alloc *alloc; /* Allocate defs here. */
upb_alloc *tmp; /* Alloc for addtab and any other tmp data. */
upb_strtable *addtab; /* full_name -> packed def ptr for new defs */
const upb_msglayout **layouts; /* NULL if we should build layouts. */
upb_status *status; /* Record errors here. */
} symtab_addctx;
static char* strviewdup(const symtab_addctx *ctx, upb_strview view) {
return upb_strdup2(view.data, view.size, ctx->alloc);
}
static bool streql2(const char *a, size_t n, const char *b) {
return n == strlen(b) && memcmp(a, b, n) == 0;
}
static bool streql_view(upb_strview view, const char *b) {
return streql2(view.data, view.size, b);
}
static const char *makefullname(const symtab_addctx *ctx, const char *prefix,
upb_strview name) {
if (prefix) {
/* ret = prefix + '.' + name; */
size_t n = strlen(prefix);
char *ret = upb_malloc(ctx->alloc, n + name.size + 2);
CHK_OOM(ret);
strcpy(ret, prefix);
ret[n] = '.';
memcpy(&ret[n + 1], name.data, name.size);
ret[n + 1 + name.size] = '\0';
return ret;
} else {
return strviewdup(ctx, name);
}
}
static bool symtab_add(const symtab_addctx *ctx, const char *name,
upb_value v) {
upb_value tmp;
if (upb_strtable_lookup(ctx->addtab, name, &tmp) ||
upb_strtable_lookup(&ctx->symtab->syms, name, &tmp)) {
upb_status_seterrf(ctx->status, "duplicate symbol '%s'", name);
return false;
}
CHK_OOM(upb_strtable_insert3(ctx->addtab, name, strlen(name), v, ctx->tmp));
return true;
}
/* Given a symbol and the base symbol inside which it is defined, find the
* symbol's definition in t. */
static bool resolvename(const upb_strtable *t, const upb_fielddef *f,
const char *base, upb_strview sym,
upb_deftype_t type, upb_status *status,
const void **def) {
if(sym.size == 0) return NULL;
if(sym.data[0] == '.') {
/* Symbols starting with '.' are absolute, so we do a single lookup.
* Slice to omit the leading '.' */
upb_value v;
if (!upb_strtable_lookup2(t, sym.data + 1, sym.size - 1, &v)) {
return false;
}
*def = unpack_def(v, type);
if (!*def) {
upb_status_seterrf(status,
"type mismatch when resolving field %s, name %s",
f->full_name, sym.data);
return false;
}
return true;
} else {
/* Remove components from base until we find an entry or run out.
* TODO: This branch is totally broken, but currently not used. */
(void)base;
UPB_ASSERT(false);
return false;
}
}
const void *symtab_resolve(const symtab_addctx *ctx, const upb_fielddef *f,
const char *base, upb_strview sym,
upb_deftype_t type) {
const void *ret;
if (!resolvename(ctx->addtab, f, base, sym, type, ctx->status, &ret) &&
!resolvename(&ctx->symtab->syms, f, base, sym, type, ctx->status, &ret)) {
if (upb_ok(ctx->status)) {
upb_status_seterrf(ctx->status, "couldn't resolve name '%s'", sym.data);
}
return false;
}
return ret;
}
static bool create_oneofdef(
const symtab_addctx *ctx, upb_msgdef *m,
const google_protobuf_OneofDescriptorProto *oneof_proto) {
upb_oneofdef *o;
upb_strview name = google_protobuf_OneofDescriptorProto_name(oneof_proto);
upb_value v;
o = (upb_oneofdef*)&m->oneofs[m->oneof_count++];
o->parent = m;
o->full_name = makefullname(ctx, m->full_name, name);
v = pack_def(o, UPB_DEFTYPE_ONEOF);
CHK_OOM(symtab_add(ctx, o->full_name, v));
CHK_OOM(upb_strtable_insert3(&m->ntof, name.data, name.size, v, ctx->alloc));
CHK_OOM(upb_inttable_init2(&o->itof, UPB_CTYPE_CONSTPTR, ctx->alloc));
CHK_OOM(upb_strtable_init2(&o->ntof, UPB_CTYPE_CONSTPTR, ctx->alloc));
return true;
}
static bool parse_default(const symtab_addctx *ctx, const char *str, size_t len,
upb_fielddef *f) {
char *end;
char nullz[64];
errno = 0;
switch (upb_fielddef_type(f)) {
case UPB_TYPE_INT32:
case UPB_TYPE_INT64:
case UPB_TYPE_UINT32:
case UPB_TYPE_UINT64:
case UPB_TYPE_DOUBLE:
case UPB_TYPE_FLOAT:
/* Standard C number parsing functions expect null-terminated strings. */
if (len >= sizeof(nullz) - 1) {
return false;
}
memcpy(nullz, str, len);
nullz[len] = '\0';
str = nullz;
break;
default:
break;
}
switch (upb_fielddef_type(f)) {
case UPB_TYPE_INT32: {
long val = strtol(str, &end, 0);
CHK(val <= INT32_MAX && val >= INT32_MIN && errno != ERANGE && !*end);
f->defaultval.sint = val;
break;
}
case UPB_TYPE_ENUM: {
const upb_enumdef *e = f->sub.enumdef;
int32_t val;
CHK(upb_enumdef_ntoi(e, str, len, &val));
f->defaultval.sint = val;
break;
}
case UPB_TYPE_INT64: {
/* XXX: Need to write our own strtoll, since it's not available in c89. */
long long val = strtol(str, &end, 0);
CHK(val <= INT64_MAX && val >= INT64_MIN && errno != ERANGE && !*end);
f->defaultval.sint = val;
break;
}
case UPB_TYPE_UINT32: {
unsigned long val = strtoul(str, &end, 0);
CHK(val <= UINT32_MAX && errno != ERANGE && !*end);
f->defaultval.uint = val;
break;
}
case UPB_TYPE_UINT64: {
/* XXX: Need to write our own strtoull, since it's not available in c89. */
unsigned long long val = strtoul(str, &end, 0);
CHK(val <= UINT64_MAX && errno != ERANGE && !*end);
f->defaultval.uint = val;
break;
}
case UPB_TYPE_DOUBLE: {
double val = strtod(str, &end);
CHK(errno != ERANGE && !*end);
f->defaultval.dbl = val;
break;
}
case UPB_TYPE_FLOAT: {
/* XXX: Need to write our own strtof, since it's not available in c89. */
float val = strtod(str, &end);
CHK(errno != ERANGE && !*end);
f->defaultval.flt = val;
break;
}
case UPB_TYPE_BOOL: {
if (streql2(str, len, "false")) {
f->defaultval.boolean = false;
} else if (streql2(str, len, "true")) {
f->defaultval.boolean = true;
} else {
return false;
}
break;
}
case UPB_TYPE_STRING:
f->defaultval.str = newstr(ctx->alloc, str, len);
break;
case UPB_TYPE_BYTES:
/* XXX: need to interpret the C-escaped value. */
f->defaultval.str = newstr(ctx->alloc, str, len);
break;
case UPB_TYPE_MESSAGE:
/* Should not have a default value. */
return false;
}
return true;
}
static void set_default_default(const symtab_addctx *ctx, upb_fielddef *f) {
switch (upb_fielddef_type(f)) {
case UPB_TYPE_INT32:
case UPB_TYPE_INT64:
case UPB_TYPE_ENUM:
f->defaultval.sint = 0;
break;
case UPB_TYPE_UINT64:
case UPB_TYPE_UINT32:
f->defaultval.uint = 0;
break;
case UPB_TYPE_DOUBLE:
case UPB_TYPE_FLOAT:
f->defaultval.dbl = 0;
break;
case UPB_TYPE_STRING:
case UPB_TYPE_BYTES:
f->defaultval.str = newstr(ctx->alloc, NULL, 0);
break;
case UPB_TYPE_BOOL:
f->defaultval.boolean = false;
break;
case UPB_TYPE_MESSAGE:
break;
}
}
static bool create_fielddef(
const symtab_addctx *ctx, const char *prefix, upb_msgdef *m,
const google_protobuf_FieldDescriptorProto *field_proto) {
upb_alloc *alloc = ctx->alloc;
upb_fielddef *f;
const google_protobuf_FieldOptions *options;
upb_strview name;
const char *full_name;
const char *shortname;
uint32_t field_number;
if (!google_protobuf_FieldDescriptorProto_has_name(field_proto)) {
upb_status_seterrmsg(ctx->status, "field has no name");
return false;
}
name = google_protobuf_FieldDescriptorProto_name(field_proto);
CHK(upb_isident(name, false, ctx->status));
full_name = makefullname(ctx, prefix, name);
shortname = shortdefname(full_name);
field_number = google_protobuf_FieldDescriptorProto_number(field_proto);
if (field_number == 0 || field_number > UPB_MAX_FIELDNUMBER) {
upb_status_seterrf(ctx->status, "invalid field number (%u)", field_number);
return false;
}
if (m) {
/* direct message field. */
upb_value v, packed_v;
f = (upb_fielddef*)&m->fields[m->field_count++];
f->msgdef = m;
f->is_extension_ = false;
packed_v = pack_def(f, UPB_DEFTYPE_FIELD);
v = upb_value_constptr(f);
if (!upb_strtable_insert3(&m->ntof, name.data, name.size, packed_v, alloc)) {
upb_status_seterrf(ctx->status, "duplicate field name (%s)", shortname);
return false;
}
if (!upb_inttable_insert2(&m->itof, field_number, v, alloc)) {
upb_status_seterrf(ctx->status, "duplicate field number (%u)",
field_number);
return false;
}
} else {
/* extension field. */
f = (upb_fielddef*)&ctx->file->exts[ctx->file->ext_count];
f->is_extension_ = true;
CHK_OOM(symtab_add(ctx, full_name, pack_def(f, UPB_DEFTYPE_FIELD)));
}
f->full_name = full_name;
f->file = ctx->file;
f->type_ = (int)google_protobuf_FieldDescriptorProto_type(field_proto);
f->label_ = (int)google_protobuf_FieldDescriptorProto_label(field_proto);
f->number_ = field_number;
f->oneof = NULL;
/* We can't resolve the subdef or (in the case of extensions) the containing
* message yet, because it may not have been defined yet. We stash a pointer
* to the field_proto until later when we can properly resolve it. */
f->sub.unresolved = field_proto;
if (f->label_ == UPB_LABEL_REQUIRED && f->file->syntax == UPB_SYNTAX_PROTO3) {
upb_status_seterrf(ctx->status, "proto3 fields cannot be required (%s)",
f->full_name);
return false;
}
if (google_protobuf_FieldDescriptorProto_has_oneof_index(field_proto)) {
int oneof_index =
google_protobuf_FieldDescriptorProto_oneof_index(field_proto);
upb_oneofdef *oneof;
upb_value v = upb_value_constptr(f);
if (upb_fielddef_label(f) != UPB_LABEL_OPTIONAL) {
upb_status_seterrf(ctx->status,
"fields in oneof must have OPTIONAL label (%s)",
f->full_name);
return false;
}
if (!m) {
upb_status_seterrf(ctx->status,
"oneof_index provided for extension field (%s)",
f->full_name);
return false;
}
if (oneof_index >= m->oneof_count) {
upb_status_seterrf(ctx->status, "oneof_index out of range (%s)",
f->full_name);
return false;
}
oneof = (upb_oneofdef*)&m->oneofs[oneof_index];
f->oneof = oneof;
CHK(upb_inttable_insert2(&oneof->itof, f->number_, v, alloc));
CHK(upb_strtable_insert3(&oneof->ntof, name.data, name.size, v, alloc));
} else {
f->oneof = NULL;
}
if (google_protobuf_FieldDescriptorProto_has_options(field_proto)) {
options = google_protobuf_FieldDescriptorProto_options(field_proto);
f->lazy_ = google_protobuf_FieldOptions_lazy(options);
f->packed_ = google_protobuf_FieldOptions_packed(options);
} else {
f->lazy_ = false;
f->packed_ = false;
}
return true;
}
static bool create_enumdef(
const symtab_addctx *ctx, const char *prefix,
const google_protobuf_EnumDescriptorProto *enum_proto) {
upb_enumdef *e;
const google_protobuf_EnumValueDescriptorProto *const *values;
upb_strview name;
size_t i, n;
name = google_protobuf_EnumDescriptorProto_name(enum_proto);
CHK(upb_isident(name, false, ctx->status));
e = (upb_enumdef*)&ctx->file->enums[ctx->file->enum_count++];
e->full_name = makefullname(ctx, prefix, name);
CHK_OOM(symtab_add(ctx, e->full_name, pack_def(e, UPB_DEFTYPE_ENUM)));
CHK_OOM(upb_strtable_init2(&e->ntoi, UPB_CTYPE_INT32, ctx->alloc));
CHK_OOM(upb_inttable_init2(&e->iton, UPB_CTYPE_CSTR, ctx->alloc));
e->file = ctx->file;
e->defaultval = 0;
values = google_protobuf_EnumDescriptorProto_value(enum_proto, &n);
if (n == 0) {
upb_status_seterrf(ctx->status,
"enums must contain at least one value (%s)",
e->full_name);
return false;
}
for (i = 0; i < n; i++) {
const google_protobuf_EnumValueDescriptorProto *value = values[i];
upb_strview name = google_protobuf_EnumValueDescriptorProto_name(value);
char *name2 = strviewdup(ctx, name);
int32_t num = google_protobuf_EnumValueDescriptorProto_number(value);
upb_value v = upb_value_int32(num);
if (i == 0 && e->file->syntax == UPB_SYNTAX_PROTO3 && num != 0) {
upb_status_seterrf(ctx->status,
"for proto3, the first enum value must be zero (%s)",
e->full_name);
return false;
}
if (upb_strtable_lookup(&e->ntoi, name2, NULL)) {
upb_status_seterrf(ctx->status, "duplicate enum label '%s'", name2);
return false;
}
CHK_OOM(name2)
CHK_OOM(
upb_strtable_insert3(&e->ntoi, name2, strlen(name2), v, ctx->alloc));
if (!upb_inttable_lookup(&e->iton, num, NULL)) {
upb_value v = upb_value_cstr(name2);
CHK_OOM(upb_inttable_insert2(&e->iton, num, v, ctx->alloc));
}
}
upb_inttable_compact2(&e->iton, ctx->alloc);
return true;
}
static bool create_msgdef(symtab_addctx *ctx, const char *prefix,
const google_protobuf_DescriptorProto *msg_proto) {
upb_msgdef *m;
const google_protobuf_MessageOptions *options;
const google_protobuf_OneofDescriptorProto *const *oneofs;
const google_protobuf_FieldDescriptorProto *const *fields;
const google_protobuf_EnumDescriptorProto *const *enums;
const google_protobuf_DescriptorProto *const *msgs;
size_t i, n;
upb_strview name;
name = google_protobuf_DescriptorProto_name(msg_proto);
CHK(upb_isident(name, false, ctx->status));
m = (upb_msgdef*)&ctx->file->msgs[ctx->file->msg_count++];
m->full_name = makefullname(ctx, prefix, name);
CHK_OOM(symtab_add(ctx, m->full_name, pack_def(m, UPB_DEFTYPE_MSG)));
CHK_OOM(upb_inttable_init2(&m->itof, UPB_CTYPE_CONSTPTR, ctx->alloc));
CHK_OOM(upb_strtable_init2(&m->ntof, UPB_CTYPE_CONSTPTR, ctx->alloc));
m->file = ctx->file;
m->map_entry = false;
options = google_protobuf_DescriptorProto_options(msg_proto);
if (options) {
m->map_entry = google_protobuf_MessageOptions_map_entry(options);
}
if (ctx->layouts) {
m->layout = *ctx->layouts;
ctx->layouts++;
} else {
/* Allocate now (to allow cross-linking), populate later. */
m->layout = upb_malloc(ctx->alloc, sizeof(*m->layout));
}
oneofs = google_protobuf_DescriptorProto_oneof_decl(msg_proto, &n);
m->oneof_count = 0;
m->oneofs = upb_malloc(ctx->alloc, sizeof(*m->oneofs) * n);
for (i = 0; i < n; i++) {
CHK(create_oneofdef(ctx, m, oneofs[i]));
}
fields = google_protobuf_DescriptorProto_field(msg_proto, &n);
m->field_count = 0;
m->fields = upb_malloc(ctx->alloc, sizeof(*m->fields) * n);
for (i = 0; i < n; i++) {
CHK(create_fielddef(ctx, m->full_name, m, fields[i]));
}
CHK(assign_msg_indices(m, ctx->status));
assign_msg_wellknowntype(m);
upb_inttable_compact2(&m->itof, ctx->alloc);
/* This message is built. Now build nested messages and enums. */
enums = google_protobuf_DescriptorProto_enum_type(msg_proto, &n);
for (i = 0; i < n; i++) {
CHK(create_enumdef(ctx, m->full_name, enums[i]));
}
msgs = google_protobuf_DescriptorProto_nested_type(msg_proto, &n);
for (i = 0; i < n; i++) {
CHK(create_msgdef(ctx, m->full_name, msgs[i]));
}
return true;
}
typedef struct {
int msg_count;
int enum_count;
int ext_count;
} decl_counts;
static void count_types_in_msg(const google_protobuf_DescriptorProto *msg_proto,
decl_counts *counts) {
const google_protobuf_DescriptorProto *const *msgs;
size_t i, n;
counts->msg_count++;
msgs = google_protobuf_DescriptorProto_nested_type(msg_proto, &n);
for (i = 0; i < n; i++) {
count_types_in_msg(msgs[i], counts);
}
google_protobuf_DescriptorProto_enum_type(msg_proto, &n);
counts->enum_count += n;
google_protobuf_DescriptorProto_extension(msg_proto, &n);
counts->ext_count += n;
}
static void count_types_in_file(
const google_protobuf_FileDescriptorProto *file_proto,
decl_counts *counts) {
const google_protobuf_DescriptorProto *const *msgs;
size_t i, n;
msgs = google_protobuf_FileDescriptorProto_message_type(file_proto, &n);
for (i = 0; i < n; i++) {
count_types_in_msg(msgs[i], counts);
}
google_protobuf_FileDescriptorProto_enum_type(file_proto, &n);
counts->enum_count += n;
google_protobuf_FileDescriptorProto_extension(file_proto, &n);
counts->ext_count += n;
}
static bool resolve_fielddef(const symtab_addctx *ctx, const char *prefix,
upb_fielddef *f) {
upb_strview name;
const google_protobuf_FieldDescriptorProto *field_proto = f->sub.unresolved;
if (f->is_extension_) {
if (!google_protobuf_FieldDescriptorProto_has_extendee(field_proto)) {
upb_status_seterrf(ctx->status,
"extension for field '%s' had no extendee",
f->full_name);
return false;
}
name = google_protobuf_FieldDescriptorProto_extendee(field_proto);
f->msgdef = symtab_resolve(ctx, f, prefix, name, UPB_DEFTYPE_MSG);
CHK(f->msgdef);
}
if ((upb_fielddef_issubmsg(f) || f->type_ == UPB_DESCRIPTOR_TYPE_ENUM) &&
!google_protobuf_FieldDescriptorProto_has_type_name(field_proto)) {
upb_status_seterrf(ctx->status, "field '%s' is missing type name",
f->full_name);
return false;
}
name = google_protobuf_FieldDescriptorProto_type_name(field_proto);
if (upb_fielddef_issubmsg(f)) {
f->sub.msgdef = symtab_resolve(ctx, f, prefix, name, UPB_DEFTYPE_MSG);
CHK(f->sub.msgdef);
} else if (f->type_ == UPB_DESCRIPTOR_TYPE_ENUM) {
f->sub.enumdef = symtab_resolve(ctx, f, prefix, name, UPB_DEFTYPE_ENUM);
CHK(f->sub.enumdef);
}
/* Have to delay resolving of the default value until now because of the enum
* case, since enum defaults are specified with a label. */
if (google_protobuf_FieldDescriptorProto_has_default_value(field_proto)) {
upb_strview defaultval =
google_protobuf_FieldDescriptorProto_default_value(field_proto);
if (f->file->syntax == UPB_SYNTAX_PROTO3) {
upb_status_seterrf(ctx->status,
"proto3 fields cannot have explicit defaults (%s)",
f->full_name);
return false;
}
if (upb_fielddef_issubmsg(f)) {
upb_status_seterrf(ctx->status,
"message fields cannot have explicit defaults (%s)",
f->full_name);
return false;
}
if (!parse_default(ctx, defaultval.data, defaultval.size, f)) {
upb_status_seterrf(ctx->status,
"couldn't parse default '" UPB_STRVIEW_FORMAT
"' for field (%s)",
UPB_STRVIEW_ARGS(defaultval), f->full_name);
return false;
}
} else {
set_default_default(ctx, f);
}
return true;
}
static bool build_filedef(
symtab_addctx *ctx, upb_filedef *file,
const google_protobuf_FileDescriptorProto *file_proto) {
upb_alloc *alloc = ctx->alloc;
const google_protobuf_FileOptions *file_options_proto;
const google_protobuf_DescriptorProto *const *msgs;
const google_protobuf_EnumDescriptorProto *const *enums;
const google_protobuf_FieldDescriptorProto *const *exts;
const upb_strview* strs;
size_t i, n;
decl_counts counts = {0};
count_types_in_file(file_proto, &counts);
file->msgs = upb_malloc(alloc, sizeof(*file->msgs) * counts.msg_count);
file->enums = upb_malloc(alloc, sizeof(*file->enums) * counts.enum_count);
file->exts = upb_malloc(alloc, sizeof(*file->exts) * counts.ext_count);
CHK_OOM(counts.msg_count == 0 || file->msgs);
CHK_OOM(counts.enum_count == 0 || file->enums);
CHK_OOM(counts.ext_count == 0 || file->exts);
/* We increment these as defs are added. */
file->msg_count = 0;
file->enum_count = 0;
file->ext_count = 0;
if (!google_protobuf_FileDescriptorProto_has_name(file_proto)) {
upb_status_seterrmsg(ctx->status, "File has no name");
return false;
}
file->name =
strviewdup(ctx, google_protobuf_FileDescriptorProto_name(file_proto));
file->phpprefix = NULL;
file->phpnamespace = NULL;
if (google_protobuf_FileDescriptorProto_has_package(file_proto)) {
upb_strview package =
google_protobuf_FileDescriptorProto_package(file_proto);
CHK(upb_isident(package, true, ctx->status));
file->package = strviewdup(ctx, package);
} else {
file->package = NULL;
}
if (google_protobuf_FileDescriptorProto_has_syntax(file_proto)) {
upb_strview syntax =
google_protobuf_FileDescriptorProto_syntax(file_proto);
if (streql_view(syntax, "proto2")) {
file->syntax = UPB_SYNTAX_PROTO2;
} else if (streql_view(syntax, "proto3")) {
file->syntax = UPB_SYNTAX_PROTO3;
} else {
upb_status_seterrf(ctx->status, "Invalid syntax '%s'", syntax);
return false;
}
} else {
file->syntax = UPB_SYNTAX_PROTO2;
}
/* Read options. */
file_options_proto = google_protobuf_FileDescriptorProto_options(file_proto);
if (file_options_proto) {
if (google_protobuf_FileOptions_has_php_class_prefix(file_options_proto)) {
file->phpprefix = strviewdup(
ctx,
google_protobuf_FileOptions_php_class_prefix(file_options_proto));
}
if (google_protobuf_FileOptions_has_php_namespace(file_options_proto)) {
file->phpnamespace = strviewdup(
ctx, google_protobuf_FileOptions_php_namespace(file_options_proto));
}
}
/* Verify dependencies. */
strs = google_protobuf_FileDescriptorProto_dependency(file_proto, &n);
file->deps = upb_malloc(alloc, sizeof(*file->deps) * n) ;
CHK_OOM(n == 0 || file->deps);
for (i = 0; i < n; i++) {
upb_strview dep_name = strs[i];
upb_value v;
if (!upb_strtable_lookup2(&ctx->symtab->files, dep_name.data,
dep_name.size, &v)) {
upb_status_seterrf(ctx->status,
"Depends on file '" UPB_STRVIEW_FORMAT
"', but it has not been loaded",
UPB_STRVIEW_ARGS(dep_name));
return false;
}
file->deps[i] = upb_value_getconstptr(v);
}
/* Create messages. */
msgs = google_protobuf_FileDescriptorProto_message_type(file_proto, &n);
for (i = 0; i < n; i++) {
CHK(create_msgdef(ctx, file->package, msgs[i]));
}
/* Create enums. */
enums = google_protobuf_FileDescriptorProto_enum_type(file_proto, &n);
for (i = 0; i < n; i++) {
CHK(create_enumdef(ctx, file->package, enums[i]));
}
/* Create extensions. */
exts = google_protobuf_FileDescriptorProto_extension(file_proto, &n);
file->exts = upb_malloc(alloc, sizeof(*file->exts) * n);
CHK_OOM(n == 0 || file->exts);
for (i = 0; i < n; i++) {
CHK(create_fielddef(ctx, file->package, NULL, exts[i]));
}
/* Now that all names are in the table, build layouts and resolve refs. */
for (i = 0; i < file->ext_count; i++) {
CHK(resolve_fielddef(ctx, file->package, (upb_fielddef*)&file->exts[i]));
}
for (i = 0; i < file->msg_count; i++) {
const upb_msgdef *m = &file->msgs[i];
int j;
for (j = 0; j < m->field_count; j++) {
CHK(resolve_fielddef(ctx, m->full_name, (upb_fielddef*)&m->fields[j]));
}
}
for (i = 0; i < file->msg_count; i++) {
const upb_msgdef *m = &file->msgs[i];
make_layout(ctx->symtab, m);
}
return true;
}
static bool upb_symtab_addtotabs(upb_symtab *s, symtab_addctx *ctx,
upb_status *status) {
const upb_filedef *file = ctx->file;
upb_alloc *alloc = upb_arena_alloc(s->arena);
upb_strtable_iter iter;
CHK_OOM(upb_strtable_insert3(&s->files, file->name, strlen(file->name),
upb_value_constptr(file), alloc));
upb_strtable_begin(&iter, ctx->addtab);
for (; !upb_strtable_done(&iter); upb_strtable_next(&iter)) {
upb_strview key = upb_strtable_iter_key(&iter);
upb_value value = upb_strtable_iter_value(&iter);
CHK_OOM(upb_strtable_insert3(&s->syms, key.data, key.size, value, alloc));
}
return true;
}
/* upb_filedef ****************************************************************/
const char *upb_filedef_name(const upb_filedef *f) {
return f->name;
}
const char *upb_filedef_package(const upb_filedef *f) {
return f->package;
}
const char *upb_filedef_phpprefix(const upb_filedef *f) {
return f->phpprefix;
}
const char *upb_filedef_phpnamespace(const upb_filedef *f) {
return f->phpnamespace;
}
upb_syntax_t upb_filedef_syntax(const upb_filedef *f) {
return f->syntax;
}
int upb_filedef_msgcount(const upb_filedef *f) {
return f->msg_count;
}
int upb_filedef_depcount(const upb_filedef *f) {
return f->dep_count;
}
int upb_filedef_enumcount(const upb_filedef *f) {
return f->enum_count;
}
const upb_filedef *upb_filedef_dep(const upb_filedef *f, int i) {
return i < 0 || i >= f->dep_count ? NULL : f->deps[i];
}
const upb_msgdef *upb_filedef_msg(const upb_filedef *f, int i) {
return i < 0 || i >= f->msg_count ? NULL : &f->msgs[i];
}
const upb_enumdef *upb_filedef_enum(const upb_filedef *f, int i) {
return i < 0 || i >= f->enum_count ? NULL : &f->enums[i];
}
void upb_symtab_free(upb_symtab *s) {
upb_arena_free(s->arena);
upb_gfree(s);
}
upb_symtab *upb_symtab_new(void) {
upb_symtab *s = upb_gmalloc(sizeof(*s));
upb_alloc *alloc;
if (!s) {
return NULL;
}
s->arena = upb_arena_new();
alloc = upb_arena_alloc(s->arena);
if (!upb_strtable_init2(&s->syms, UPB_CTYPE_CONSTPTR, alloc) ||
!upb_strtable_init2(&s->files, UPB_CTYPE_CONSTPTR, alloc)) {
upb_arena_free(s->arena);
upb_gfree(s);
s = NULL;
}
return s;
}
const upb_msgdef *upb_symtab_lookupmsg(const upb_symtab *s, const char *sym) {
upb_value v;
return upb_strtable_lookup(&s->syms, sym, &v) ?
unpack_def(v, UPB_DEFTYPE_MSG) : NULL;
}
const upb_msgdef *upb_symtab_lookupmsg2(const upb_symtab *s, const char *sym,
size_t len) {
upb_value v;
return upb_strtable_lookup2(&s->syms, sym, len, &v) ?
unpack_def(v, UPB_DEFTYPE_MSG) : NULL;
}
const upb_enumdef *upb_symtab_lookupenum(const upb_symtab *s, const char *sym) {
upb_value v;
return upb_strtable_lookup(&s->syms, sym, &v) ?
unpack_def(v, UPB_DEFTYPE_ENUM) : NULL;
}
const upb_filedef *upb_symtab_lookupfile(const upb_symtab *s, const char *name) {
upb_value v;
return upb_strtable_lookup(&s->files, name, &v) ? upb_value_getconstptr(v)
: NULL;
}
static const upb_filedef *_upb_symtab_addfile(
upb_symtab *s, const google_protobuf_FileDescriptorProto *file_proto,
const upb_msglayout **layouts, upb_status *status) {
upb_arena *tmparena = upb_arena_new();
upb_strtable addtab;
upb_alloc *alloc = upb_arena_alloc(s->arena);
upb_filedef *file = upb_malloc(alloc, sizeof(*file));
bool ok;
symtab_addctx ctx;
ctx.file = file;
ctx.symtab = s;
ctx.alloc = alloc;
ctx.tmp = upb_arena_alloc(tmparena);
ctx.addtab = &addtab;
ctx.layouts = layouts;
ctx.status = status;
ok = file &&
upb_strtable_init2(&addtab, UPB_CTYPE_CONSTPTR, ctx.tmp) &&
build_filedef(&ctx, file, file_proto) &&
upb_symtab_addtotabs(s, &ctx, status);
upb_arena_free(tmparena);
return ok ? file : NULL;
}
const upb_filedef *upb_symtab_addfile(
upb_symtab *s, const google_protobuf_FileDescriptorProto *file_proto,
upb_status *status) {
return _upb_symtab_addfile(s, file_proto, NULL, status);
}
/* Include here since we want most of this file to be stdio-free. */
#include <stdio.h>
bool _upb_symtab_loaddefinit(upb_symtab *s, const upb_def_init *init) {
/* Since this function should never fail (it would indicate a bug in upb) we
* print errors to stderr instead of returning error status to the user. */
upb_def_init **deps = init->deps;
google_protobuf_FileDescriptorProto *file;
upb_arena *arena;
upb_status status;
upb_status_clear(&status);
if (upb_strtable_lookup(&s->files, init->filename, NULL)) {
return true;
}
arena = upb_arena_new();
for (; *deps; deps++) {
if (!_upb_symtab_loaddefinit(s, *deps)) goto err;
}
file = google_protobuf_FileDescriptorProto_parse(
init->descriptor.data, init->descriptor.size, arena);
if (!file) {
upb_status_seterrf(
&status,
"Failed to parse compiled-in descriptor for file '%s'. This should "
"never happen.",
init->filename);
goto err;
}
if (!_upb_symtab_addfile(s, file, init->layouts, &status)) goto err;
upb_arena_free(arena);
return true;
err:
fprintf(stderr, "Error loading compiled-in descriptor: %s\n",
upb_status_errmsg(&status));
upb_arena_free(arena);
return false;
}
#undef CHK
#undef CHK_OOM