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protobuf/ruby/ext/google/protobuf_c/encode_decode.c

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// Protocol Buffers - Google's data interchange format
// Copyright 2014 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#include "protobuf.h"
VALUE initialize_rb_class_with_no_args(VALUE klass) {
return rb_funcall(klass, rb_intern("new"), 0);
}
// This function is equivalent to rb_str_cat(), but unlike the real
// rb_str_cat(), it doesn't leak memory in some versions of Ruby.
// For more information, see:
// https://bugs.ruby-lang.org/issues/11328
VALUE noleak_rb_str_cat(VALUE rb_str, const char *str, long len) {
char *p;
size_t oldlen = RSTRING_LEN(rb_str);
rb_str_modify_expand(rb_str, len);
p = RSTRING_PTR(rb_str);
memcpy(p + oldlen, str, len);
rb_str_set_len(rb_str, oldlen + len);
return rb_str;
}
bool is_wrapper(const upb_msgdef* m) {
switch (upb_msgdef_wellknowntype(m)) {
case UPB_WELLKNOWN_DOUBLEVALUE:
case UPB_WELLKNOWN_FLOATVALUE:
case UPB_WELLKNOWN_INT64VALUE:
case UPB_WELLKNOWN_UINT64VALUE:
case UPB_WELLKNOWN_INT32VALUE:
case UPB_WELLKNOWN_UINT32VALUE:
case UPB_WELLKNOWN_STRINGVALUE:
case UPB_WELLKNOWN_BYTESVALUE:
case UPB_WELLKNOWN_BOOLVALUE:
return true;
default:
return false;
}
}
// The code below also comes from upb's prototype Ruby binding, developed by
// haberman@.
/* stringsink *****************************************************************/
static void *stringsink_start(void *_sink, const void *hd, size_t size_hint) {
stringsink *sink = _sink;
sink->len = 0;
return sink;
}
static size_t stringsink_string(void *_sink, const void *hd, const char *ptr,
size_t len, const upb_bufhandle *handle) {
stringsink *sink = _sink;
size_t new_size = sink->size;
UPB_UNUSED(hd);
UPB_UNUSED(handle);
while (sink->len + len > new_size) {
new_size *= 2;
}
if (new_size != sink->size) {
sink->ptr = realloc(sink->ptr, new_size);
sink->size = new_size;
}
memcpy(sink->ptr + sink->len, ptr, len);
sink->len += len;
return len;
}
void stringsink_init(stringsink *sink) {
upb_byteshandler_init(&sink->handler);
upb_byteshandler_setstartstr(&sink->handler, stringsink_start, NULL);
upb_byteshandler_setstring(&sink->handler, stringsink_string, NULL);
upb_bytessink_reset(&sink->sink, &sink->handler, sink);
sink->size = 32;
sink->ptr = malloc(sink->size);
sink->len = 0;
}
void stringsink_uninit(stringsink *sink) {
free(sink->ptr);
}
// -----------------------------------------------------------------------------
// Parsing.
// -----------------------------------------------------------------------------
#define DEREF(msg, ofs, type) *(type*)(((uint8_t *)msg) + ofs)
typedef struct {
size_t ofs;
int32_t hasbit;
} field_handlerdata_t;
// Creates a handlerdata that contains the offset and the hasbit for the field
static const void* newhandlerdata(upb_handlers* h, uint32_t ofs, int32_t hasbit) {
field_handlerdata_t *hd = ALLOC(field_handlerdata_t);
hd->ofs = ofs;
hd->hasbit = hasbit;
upb_handlers_addcleanup(h, hd, xfree);
return hd;
}
typedef struct {
size_t ofs;
int32_t hasbit;
upb_fieldtype_t wrapped_type; // Only for wrappers.
VALUE subklass;
} submsg_handlerdata_t;
// Creates a handlerdata that contains offset and submessage type information.
static const void *newsubmsghandlerdata(upb_handlers* h,
const upb_fielddef *f,
uint32_t ofs,
int32_t hasbit,
VALUE subklass) {
submsg_handlerdata_t *hd = ALLOC(submsg_handlerdata_t);
const upb_msgdef *subm = upb_fielddef_msgsubdef(f);
hd->ofs = ofs;
hd->hasbit = hasbit;
hd->subklass = subklass;
upb_handlers_addcleanup(h, hd, xfree);
if (is_wrapper(subm)) {
const upb_fielddef *value_f = upb_msgdef_itof(subm, 1);
hd->wrapped_type = upb_fielddef_type(value_f);
}
return hd;
}
typedef struct {
size_t ofs; // union data slot
size_t case_ofs; // oneof_case field
uint32_t oneof_case_num; // oneof-case number to place in oneof_case field
VALUE subklass;
} oneof_handlerdata_t;
static const void *newoneofhandlerdata(upb_handlers *h,
uint32_t ofs,
uint32_t case_ofs,
const upb_fielddef *f,
const Descriptor* desc) {
oneof_handlerdata_t *hd = ALLOC(oneof_handlerdata_t);
hd->ofs = ofs;
hd->case_ofs = case_ofs;
// We reuse the field tag number as a oneof union discriminant tag. Note that
// we don't expose these numbers to the user, so the only requirement is that
// we have some unique ID for each union case/possibility. The field tag
// numbers are already present and are easy to use so there's no reason to
// create a separate ID space. In addition, using the field tag number here
// lets us easily look up the field in the oneof accessor.
hd->oneof_case_num = upb_fielddef_number(f);
if (is_value_field(f)) {
hd->oneof_case_num |= ONEOF_CASE_MASK;
}
hd->subklass = field_type_class(desc->layout, f);
upb_handlers_addcleanup(h, hd, xfree);
return hd;
}
// A handler that starts a repeated field. Gets the Repeated*Field instance for
// this field (such an instance always exists even in an empty message).
static void *startseq_handler(void* closure, const void* hd) {
MessageHeader* msg = closure;
const size_t *ofs = hd;
return (void*)DEREF(msg, *ofs, VALUE);
}
// Handlers that append primitive values to a repeated field.
#define DEFINE_APPEND_HANDLER(type, ctype) \
static bool append##type##_handler(void *closure, const void *hd, \
ctype val) { \
VALUE ary = (VALUE)closure; \
RepeatedField_push_native(ary, &val); \
return true; \
}
DEFINE_APPEND_HANDLER(bool, bool)
DEFINE_APPEND_HANDLER(int32, int32_t)
DEFINE_APPEND_HANDLER(uint32, uint32_t)
DEFINE_APPEND_HANDLER(float, float)
DEFINE_APPEND_HANDLER(int64, int64_t)
DEFINE_APPEND_HANDLER(uint64, uint64_t)
DEFINE_APPEND_HANDLER(double, double)
// Appends a string to a repeated field.
static void* appendstr_handler(void *closure,
const void *hd,
size_t size_hint) {
VALUE ary = (VALUE)closure;
VALUE str = rb_str_new2("");
rb_enc_associate(str, kRubyStringUtf8Encoding);
RepeatedField_push_native(ary, &str);
return (void*)str;
}
static void set_hasbit(void *closure, int32_t hasbit) {
if (hasbit > 0) {
uint8_t* storage = closure;
storage[hasbit/8] |= 1 << (hasbit % 8);
}
}
// Appends a 'bytes' string to a repeated field.
static void* appendbytes_handler(void *closure,
const void *hd,
size_t size_hint) {
VALUE ary = (VALUE)closure;
VALUE str = rb_str_new2("");
rb_enc_associate(str, kRubyString8bitEncoding);
RepeatedField_push_native(ary, &str);
return (void*)str;
}
// Sets a non-repeated string field in a message.
static void* str_handler(void *closure,
const void *hd,
size_t size_hint) {
MessageHeader* msg = closure;
const field_handlerdata_t *fieldhandler = hd;
VALUE str = rb_str_new2("");
rb_enc_associate(str, kRubyStringUtf8Encoding);
DEREF(msg, fieldhandler->ofs, VALUE) = str;
set_hasbit(closure, fieldhandler->hasbit);
return (void*)str;
}
// Sets a non-repeated 'bytes' field in a message.
static void* bytes_handler(void *closure,
const void *hd,
size_t size_hint) {
MessageHeader* msg = closure;
const field_handlerdata_t *fieldhandler = hd;
VALUE str = rb_str_new2("");
rb_enc_associate(str, kRubyString8bitEncoding);
DEREF(msg, fieldhandler->ofs, VALUE) = str;
set_hasbit(closure, fieldhandler->hasbit);
return (void*)str;
}
static size_t stringdata_handler(void* closure, const void* hd,
const char* str, size_t len,
const upb_bufhandle* handle) {
VALUE rb_str = (VALUE)closure;
noleak_rb_str_cat(rb_str, str, len);
return len;
}
static bool stringdata_end_handler(void* closure, const void* hd) {
VALUE rb_str = (VALUE)closure;
rb_obj_freeze(rb_str);
return true;
}
static bool appendstring_end_handler(void* closure, const void* hd) {
VALUE rb_str = (VALUE)closure;
rb_obj_freeze(rb_str);
return true;
}
// Appends a submessage to a repeated field (a regular Ruby array for now).
static void *appendsubmsg_handler(void *closure, const void *hd) {
VALUE ary = (VALUE)closure;
const submsg_handlerdata_t *submsgdata = hd;
MessageHeader* submsg;
VALUE submsg_rb = initialize_rb_class_with_no_args(submsgdata->subklass);
RepeatedField_push(ary, submsg_rb);
TypedData_Get_Struct(submsg_rb, MessageHeader, &Message_type, submsg);
return submsg;
}
// Appends a wrapper to a repeated field (a regular Ruby array for now).
static void *appendwrapper_handler(void *closure, const void *hd) {
VALUE ary = (VALUE)closure;
int size = RepeatedField_size(ary);
(void)hd;
RepeatedField_push(ary, Qnil);
return RepeatedField_index_native(ary, size);
}
// Sets a non-repeated submessage field in a message.
static void *submsg_handler(void *closure, const void *hd) {
MessageHeader* msg = closure;
const submsg_handlerdata_t* submsgdata = hd;
VALUE submsg_rb;
MessageHeader* submsg;
if (DEREF(msg, submsgdata->ofs, VALUE) == Qnil) {
DEREF(msg, submsgdata->ofs, VALUE) =
initialize_rb_class_with_no_args(submsgdata->subklass);
}
set_hasbit(closure, submsgdata->hasbit);
submsg_rb = DEREF(msg, submsgdata->ofs, VALUE);
TypedData_Get_Struct(submsg_rb, MessageHeader, &Message_type, submsg);
return submsg;
}
static void* startwrapper(void* closure, const void* hd) {
const submsg_handlerdata_t* submsgdata = hd;
char* msg = closure;
VALUE* field = (VALUE*)(msg + submsgdata->ofs);
set_hasbit(closure, submsgdata->hasbit);
switch (submsgdata->wrapped_type) {
case UPB_TYPE_FLOAT:
case UPB_TYPE_DOUBLE:
*field = DBL2NUM(0);
break;
case UPB_TYPE_BOOL:
*field = Qfalse;
break;
case UPB_TYPE_STRING:
*field = get_frozen_string(NULL, 0, false);
break;
case UPB_TYPE_BYTES:
*field = get_frozen_string(NULL, 0, true);
break;
case UPB_TYPE_ENUM:
case UPB_TYPE_INT32:
case UPB_TYPE_INT64:
case UPB_TYPE_UINT32:
case UPB_TYPE_UINT64:
*field = INT2NUM(0);
break;
case UPB_TYPE_MESSAGE:
rb_raise(rb_eRuntimeError,
"Internal logic error with well-known types.");
}
return field;
}
// Handler data for startmap/endmap handlers.
typedef struct {
size_t ofs;
upb_fieldtype_t key_field_type;
upb_fieldtype_t value_field_type;
VALUE subklass;
} map_handlerdata_t;
// Temporary frame for map parsing: at the beginning of a map entry message, a
// submsg handler allocates a frame to hold (i) a reference to the Map object
// into which this message will be inserted and (ii) storage slots to
// temporarily hold the key and value for this map entry until the end of the
// submessage. When the submessage ends, another handler is called to insert the
// value into the map.
typedef struct {
VALUE map;
const map_handlerdata_t* handlerdata;
char key_storage[NATIVE_SLOT_MAX_SIZE];
char value_storage[NATIVE_SLOT_MAX_SIZE];
} map_parse_frame_t;
static void MapParseFrame_mark(void* _self) {
map_parse_frame_t* frame = _self;
// This shouldn't strictly be necessary since this should be rooted by the
// message itself, but it can't hurt.
rb_gc_mark(frame->map);
native_slot_mark(frame->handlerdata->key_field_type, &frame->key_storage);
native_slot_mark(frame->handlerdata->value_field_type, &frame->value_storage);
}
void MapParseFrame_free(void* self) {
xfree(self);
}
rb_data_type_t MapParseFrame_type = {
"MapParseFrame",
{ MapParseFrame_mark, MapParseFrame_free, NULL },
};
// Handler to begin a map entry: allocates a temporary frame. This is the
// 'startsubmsg' handler on the msgdef that contains the map field.
static void *startmap_handler(void *closure, const void *hd) {
MessageHeader* msg = closure;
const map_handlerdata_t* mapdata = hd;
map_parse_frame_t* frame = ALLOC(map_parse_frame_t);
VALUE map_rb = DEREF(msg, mapdata->ofs, VALUE);
frame->handlerdata = mapdata;
frame->map = map_rb;
native_slot_init(mapdata->key_field_type, &frame->key_storage);
native_slot_init(mapdata->value_field_type, &frame->value_storage);
Map_set_frame(map_rb,
TypedData_Wrap_Struct(rb_cObject, &MapParseFrame_type, frame));
return frame;
}
static bool endmap_handler(void *closure, const void *hd) {
map_parse_frame_t* frame = closure;
Map_set_frame(frame->map, Qnil);
return true;
}
// Handler to end a map entry: inserts the value defined during the message into
// the map. This is the 'endmsg' handler on the map entry msgdef.
static bool endmapentry_handler(void* closure, const void* hd, upb_status* s) {
map_parse_frame_t* frame = closure;
const map_handlerdata_t* mapdata = hd;
VALUE key = native_slot_get(
mapdata->key_field_type, Qnil,
&frame->key_storage);
VALUE value = native_slot_get(
mapdata->value_field_type, mapdata->subklass,
&frame->value_storage);
Map_index_set(frame->map, key, value);
return true;
}
// Allocates a new map_handlerdata_t given the map entry message definition. If
// the offset of the field within the parent message is also given, that is
// added to the handler data as well. Note that this is called *twice* per map
// field: once in the parent message handler setup when setting the startsubmsg
// handler and once in the map entry message handler setup when setting the
// key/value and endmsg handlers. The reason is that there is no easy way to
// pass the handlerdata down to the sub-message handler setup.
static map_handlerdata_t* new_map_handlerdata(
size_t ofs,
const upb_msgdef* mapentry_def,
const Descriptor* desc) {
const upb_fielddef* key_field;
const upb_fielddef* value_field;
map_handlerdata_t* hd = ALLOC(map_handlerdata_t);
hd->ofs = ofs;
key_field = upb_msgdef_itof(mapentry_def, MAP_KEY_FIELD);
assert(key_field != NULL);
hd->key_field_type = upb_fielddef_type(key_field);
value_field = upb_msgdef_itof(mapentry_def, MAP_VALUE_FIELD);
assert(value_field != NULL);
hd->value_field_type = upb_fielddef_type(value_field);
hd->subklass = field_type_class(desc->layout, value_field);
return hd;
}
// Handlers that set primitive values in oneofs.
#define DEFINE_ONEOF_HANDLER(type, ctype) \
static bool oneof##type##_handler(void *closure, const void *hd, \
ctype val) { \
const oneof_handlerdata_t *oneofdata = hd; \
DEREF(closure, oneofdata->case_ofs, uint32_t) = \
oneofdata->oneof_case_num; \
DEREF(closure, oneofdata->ofs, ctype) = val; \
return true; \
}
DEFINE_ONEOF_HANDLER(bool, bool)
DEFINE_ONEOF_HANDLER(int32, int32_t)
DEFINE_ONEOF_HANDLER(uint32, uint32_t)
DEFINE_ONEOF_HANDLER(float, float)
DEFINE_ONEOF_HANDLER(int64, int64_t)
DEFINE_ONEOF_HANDLER(uint64, uint64_t)
DEFINE_ONEOF_HANDLER(double, double)
#undef DEFINE_ONEOF_HANDLER
// Handlers for strings in a oneof.
static void *oneofstr_handler(void *closure,
const void *hd,
size_t size_hint) {
MessageHeader* msg = closure;
const oneof_handlerdata_t *oneofdata = hd;
VALUE str = rb_str_new2("");
rb_enc_associate(str, kRubyStringUtf8Encoding);
DEREF(msg, oneofdata->case_ofs, uint32_t) =
oneofdata->oneof_case_num;
DEREF(msg, oneofdata->ofs, VALUE) = str;
return (void*)str;
}
static void *oneofbytes_handler(void *closure,
const void *hd,
size_t size_hint) {
MessageHeader* msg = closure;
const oneof_handlerdata_t *oneofdata = hd;
VALUE str = rb_str_new2("");
rb_enc_associate(str, kRubyString8bitEncoding);
DEREF(msg, oneofdata->case_ofs, uint32_t) =
oneofdata->oneof_case_num;
DEREF(msg, oneofdata->ofs, VALUE) = str;
return (void*)str;
}
static bool oneofstring_end_handler(void* closure, const void* hd) {
VALUE rb_str = rb_str_new2("");
rb_obj_freeze(rb_str);
return true;
}
// Handler for a submessage field in a oneof.
static void *oneofsubmsg_handler(void *closure,
const void *hd) {
MessageHeader* msg = closure;
const oneof_handlerdata_t *oneofdata = hd;
uint32_t oldcase = DEREF(msg, oneofdata->case_ofs, uint32_t);
VALUE submsg_rb;
MessageHeader* submsg;
if (oldcase != oneofdata->oneof_case_num ||
DEREF(msg, oneofdata->ofs, VALUE) == Qnil) {
DEREF(msg, oneofdata->ofs, VALUE) =
initialize_rb_class_with_no_args(oneofdata->subklass);
}
// Set the oneof case *after* allocating the new class instance -- otherwise,
// if the Ruby GC is invoked as part of a call into the VM, it might invoke
// our mark routines, and our mark routines might see the case value
// indicating a VALUE is present and expect a valid VALUE. See comment in
// layout_set() for more detail: basically, the change to the value and the
// case must be atomic w.r.t. the Ruby VM.
DEREF(msg, oneofdata->case_ofs, uint32_t) = oneofdata->oneof_case_num;
submsg_rb = DEREF(msg, oneofdata->ofs, VALUE);
TypedData_Get_Struct(submsg_rb, MessageHeader, &Message_type, submsg);
return submsg;
}
static void* oneof_startwrapper(void* closure, const void* hd) {
char* msg = closure;
const oneof_handlerdata_t *oneofdata = hd;
DEREF(msg, oneofdata->case_ofs, uint32_t) = oneofdata->oneof_case_num;
return msg + oneofdata->ofs;
}
// Set up handlers for a repeated field.
static void add_handlers_for_repeated_field(upb_handlers *h,
const Descriptor* desc,
const upb_fielddef *f,
size_t offset) {
upb_handlerattr attr = UPB_HANDLERATTR_INIT;
attr.handler_data = newhandlerdata(h, offset, -1);
upb_handlers_setstartseq(h, f, startseq_handler, &attr);
switch (upb_fielddef_type(f)) {
#define SET_HANDLER(utype, ltype) \
case utype: \
upb_handlers_set##ltype(h, f, append##ltype##_handler, NULL); \
break;
SET_HANDLER(UPB_TYPE_BOOL, bool);
SET_HANDLER(UPB_TYPE_INT32, int32);
SET_HANDLER(UPB_TYPE_UINT32, uint32);
SET_HANDLER(UPB_TYPE_ENUM, int32);
SET_HANDLER(UPB_TYPE_FLOAT, float);
SET_HANDLER(UPB_TYPE_INT64, int64);
SET_HANDLER(UPB_TYPE_UINT64, uint64);
SET_HANDLER(UPB_TYPE_DOUBLE, double);
#undef SET_HANDLER
case UPB_TYPE_STRING:
case UPB_TYPE_BYTES: {
bool is_bytes = upb_fielddef_type(f) == UPB_TYPE_BYTES;
upb_handlers_setstartstr(h, f, is_bytes ?
appendbytes_handler : appendstr_handler,
NULL);
upb_handlers_setstring(h, f, stringdata_handler, NULL);
upb_handlers_setendstr(h, f, appendstring_end_handler, NULL);
break;
}
case UPB_TYPE_MESSAGE: {
VALUE subklass = field_type_class(desc->layout, f);
upb_handlerattr attr = UPB_HANDLERATTR_INIT;
attr.handler_data = newsubmsghandlerdata(h, f, 0, -1, subklass);
if (is_wrapper(upb_fielddef_msgsubdef(f))) {
upb_handlers_setstartsubmsg(h, f, appendwrapper_handler, &attr);
} else {
upb_handlers_setstartsubmsg(h, f, appendsubmsg_handler, &attr);
}
break;
}
}
}
static bool doublewrapper_handler(void* closure, const void* hd, double val) {
VALUE* rbval = closure;
*rbval = DBL2NUM(val);
return true;
}
static bool floatwrapper_handler(void* closure, const void* hd, float val) {
VALUE* rbval = closure;
*rbval = DBL2NUM(val);
return true;
}
static bool int64wrapper_handler(void* closure, const void* hd, int64_t val) {
VALUE* rbval = closure;
*rbval = LL2NUM(val);
return true;
}
static bool uint64wrapper_handler(void* closure, const void* hd, uint64_t val) {
VALUE* rbval = closure;
*rbval = ULL2NUM(val);
return true;
}
static bool int32wrapper_handler(void* closure, const void* hd, int32_t val) {
VALUE* rbval = closure;
*rbval = INT2NUM(val);
return true;
}
static bool uint32wrapper_handler(void* closure, const void* hd, uint32_t val) {
VALUE* rbval = closure;
*rbval = UINT2NUM(val);
return true;
}
static void* startstringwrapper_handler(void* closure, const void* hd,
size_t size_hint) {
VALUE* rbval = closure;
(void)size_hint;
*rbval = rb_str_new(NULL, 0);
rb_enc_associate(*rbval, kRubyStringUtf8Encoding);
return closure;
}
static size_t stringwrapper_handler(void* closure, const void* hd,
const char* ptr, size_t len,
const upb_bufhandle* handle) {
VALUE* rbval = closure;
*rbval = noleak_rb_str_cat(*rbval, ptr, len);
return len;
}
static void* startbyteswrapper_handler(void* closure, const void* hd,
size_t size_hint) {
VALUE* rbval = closure;
(void)size_hint;
*rbval = rb_str_new(NULL, 0);
rb_enc_associate(*rbval, kRubyString8bitEncoding);
return closure;
}
static size_t byteswrapper_handler(void* closure, const void* hd,
const char* ptr, size_t len,
const upb_bufhandle* handle) {
VALUE* rbval = closure;
*rbval = noleak_rb_str_cat(*rbval, ptr, len);
return len;
}
static bool boolwrapper_handler(void* closure, const void* hd, bool val) {
VALUE* rbval = closure;
if (val) {
*rbval = Qtrue;
} else {
*rbval = Qfalse;
}
return true;
}
// Set up handlers for a singular field.
static void add_handlers_for_singular_field(const Descriptor* desc,
upb_handlers* h,
const upb_fielddef* f,
size_t offset, size_t hasbit_off) {
// The offset we pass to UPB points to the start of the Message,
// rather than the start of where our data is stored.
int32_t hasbit = -1;
if (hasbit_off != MESSAGE_FIELD_NO_HASBIT) {
hasbit = hasbit_off + sizeof(MessageHeader) * 8;
}
switch (upb_fielddef_type(f)) {
case UPB_TYPE_BOOL:
case UPB_TYPE_INT32:
case UPB_TYPE_UINT32:
case UPB_TYPE_ENUM:
case UPB_TYPE_FLOAT:
case UPB_TYPE_INT64:
case UPB_TYPE_UINT64:
case UPB_TYPE_DOUBLE:
upb_msg_setscalarhandler(h, f, offset, hasbit);
break;
case UPB_TYPE_STRING:
case UPB_TYPE_BYTES: {
bool is_bytes = upb_fielddef_type(f) == UPB_TYPE_BYTES;
upb_handlerattr attr = UPB_HANDLERATTR_INIT;
attr.handler_data = newhandlerdata(h, offset, hasbit);
upb_handlers_setstartstr(h, f,
is_bytes ? bytes_handler : str_handler,
&attr);
upb_handlers_setstring(h, f, stringdata_handler, &attr);
upb_handlers_setendstr(h, f, stringdata_end_handler, &attr);
break;
}
case UPB_TYPE_MESSAGE: {
upb_handlerattr attr = UPB_HANDLERATTR_INIT;
attr.handler_data = newsubmsghandlerdata(
h, f, offset, hasbit, field_type_class(desc->layout, f));
if (is_wrapper(upb_fielddef_msgsubdef(f))) {
upb_handlers_setstartsubmsg(h, f, startwrapper, &attr);
} else {
upb_handlers_setstartsubmsg(h, f, submsg_handler, &attr);
}
}
}
}
// Adds handlers to a map field.
static void add_handlers_for_mapfield(upb_handlers* h,
const upb_fielddef* fielddef,
size_t offset,
const Descriptor* desc) {
const upb_msgdef* map_msgdef = upb_fielddef_msgsubdef(fielddef);
map_handlerdata_t* hd = new_map_handlerdata(offset, map_msgdef, desc);
upb_handlerattr attr = UPB_HANDLERATTR_INIT;
upb_handlers_addcleanup(h, hd, xfree);
attr.handler_data = hd;
upb_handlers_setstartsubmsg(h, fielddef, startmap_handler, &attr);
upb_handlers_setendsubmsg(h, fielddef, endmap_handler, &attr);
}
// Adds handlers to a map-entry msgdef.
static void add_handlers_for_mapentry(const upb_msgdef* msgdef, upb_handlers* h,
const Descriptor* desc) {
const upb_fielddef* key_field = map_entry_key(msgdef);
const upb_fielddef* value_field = map_entry_value(msgdef);
map_handlerdata_t* hd = new_map_handlerdata(0, msgdef, desc);
upb_handlerattr attr = UPB_HANDLERATTR_INIT;
upb_handlers_addcleanup(h, hd, xfree);
attr.handler_data = hd;
upb_handlers_setendmsg(h, endmapentry_handler, &attr);
add_handlers_for_singular_field(
desc, h, key_field,
offsetof(map_parse_frame_t, key_storage),
MESSAGE_FIELD_NO_HASBIT);
add_handlers_for_singular_field(
desc, h, value_field,
offsetof(map_parse_frame_t, value_storage),
MESSAGE_FIELD_NO_HASBIT);
}
static void add_handlers_for_wrapper(const upb_msgdef* msgdef,
upb_handlers* h) {
const upb_fielddef* f = upb_msgdef_itof(msgdef, 1);
switch (upb_msgdef_wellknowntype(msgdef)) {
case UPB_WELLKNOWN_DOUBLEVALUE:
upb_handlers_setdouble(h, f, doublewrapper_handler, NULL);
break;
case UPB_WELLKNOWN_FLOATVALUE:
upb_handlers_setfloat(h, f, floatwrapper_handler, NULL);
break;
case UPB_WELLKNOWN_INT64VALUE:
upb_handlers_setint64(h, f, int64wrapper_handler, NULL);
break;
case UPB_WELLKNOWN_UINT64VALUE:
upb_handlers_setuint64(h, f, uint64wrapper_handler, NULL);
break;
case UPB_WELLKNOWN_INT32VALUE:
upb_handlers_setint32(h, f, int32wrapper_handler, NULL);
break;
case UPB_WELLKNOWN_UINT32VALUE:
upb_handlers_setuint32(h, f, uint32wrapper_handler, NULL);
break;
case UPB_WELLKNOWN_STRINGVALUE:
upb_handlers_setstartstr(h, f, startstringwrapper_handler, NULL);
upb_handlers_setstring(h, f, stringwrapper_handler, NULL);
break;
case UPB_WELLKNOWN_BYTESVALUE:
upb_handlers_setstartstr(h, f, startbyteswrapper_handler, NULL);
upb_handlers_setstring(h, f, byteswrapper_handler, NULL);
break;
case UPB_WELLKNOWN_BOOLVALUE:
upb_handlers_setbool(h, f, boolwrapper_handler, NULL);
return;
default:
rb_raise(rb_eRuntimeError,
"Internal logic error with well-known types.");
}
}
// Set up handlers for a oneof field.
static void add_handlers_for_oneof_field(upb_handlers *h,
const upb_fielddef *f,
size_t offset,
size_t oneof_case_offset,
const Descriptor* desc) {
upb_handlerattr attr = UPB_HANDLERATTR_INIT;
attr.handler_data =
newoneofhandlerdata(h, offset, oneof_case_offset, f, desc);
switch (upb_fielddef_type(f)) {
#define SET_HANDLER(utype, ltype) \
case utype: \
upb_handlers_set##ltype(h, f, oneof##ltype##_handler, &attr); \
break;
SET_HANDLER(UPB_TYPE_BOOL, bool);
SET_HANDLER(UPB_TYPE_INT32, int32);
SET_HANDLER(UPB_TYPE_UINT32, uint32);
SET_HANDLER(UPB_TYPE_ENUM, int32);
SET_HANDLER(UPB_TYPE_FLOAT, float);
SET_HANDLER(UPB_TYPE_INT64, int64);
SET_HANDLER(UPB_TYPE_UINT64, uint64);
SET_HANDLER(UPB_TYPE_DOUBLE, double);
#undef SET_HANDLER
case UPB_TYPE_STRING:
case UPB_TYPE_BYTES: {
bool is_bytes = upb_fielddef_type(f) == UPB_TYPE_BYTES;
upb_handlers_setstartstr(h, f, is_bytes ?
oneofbytes_handler : oneofstr_handler,
&attr);
upb_handlers_setstring(h, f, stringdata_handler, NULL);
upb_handlers_setendstr(h, f, oneofstring_end_handler, &attr);
break;
}
case UPB_TYPE_MESSAGE: {
if (is_wrapper(upb_fielddef_msgsubdef(f))) {
upb_handlers_setstartsubmsg(h, f, oneof_startwrapper, &attr);
} else {
upb_handlers_setstartsubmsg(h, f, oneofsubmsg_handler, &attr);
}
break;
}
}
}
static bool unknown_field_handler(void* closure, const void* hd,
const char* buf, size_t size) {
MessageHeader* msg = (MessageHeader*)closure;
UPB_UNUSED(hd);
if (msg->unknown_fields == NULL) {
msg->unknown_fields = malloc(sizeof(stringsink));
stringsink_init(msg->unknown_fields);
}
stringsink_string(msg->unknown_fields, NULL, buf, size, NULL);
return true;
}
size_t get_field_offset(MessageLayout* layout, const upb_fielddef* f) {
return layout->fields[upb_fielddef_index(f)].offset + sizeof(MessageHeader);
}
void add_handlers_for_message(const void *closure, upb_handlers *h) {
const VALUE descriptor_pool = (VALUE)closure;
const upb_msgdef* msgdef = upb_handlers_msgdef(h);
Descriptor* desc =
ruby_to_Descriptor(get_msgdef_obj(descriptor_pool, msgdef));
upb_msg_field_iter i;
upb_handlerattr attr = UPB_HANDLERATTR_INIT;
// Ensure layout exists. We may be invoked to create handlers for a given
// message if we are included as a submsg of another message type before our
// class is actually built, so to work around this, we just create the layout
// (and handlers, in the class-building function) on-demand.
if (desc->layout == NULL) {
create_layout(desc);
}
// If this is a mapentry message type, set up a special set of handlers and
// bail out of the normal (user-defined) message type handling.
if (upb_msgdef_mapentry(msgdef)) {
add_handlers_for_mapentry(msgdef, h, desc);
return;
}
// If this is a wrapper type, use special handlers and bail.
if (is_wrapper(msgdef)) {
add_handlers_for_wrapper(msgdef, h);
return;
}
upb_handlers_setunknown(h, unknown_field_handler, &attr);
for (upb_msg_field_begin(&i, desc->msgdef);
!upb_msg_field_done(&i);
upb_msg_field_next(&i)) {
const upb_fielddef *f = upb_msg_iter_field(&i);
const upb_oneofdef* oneof = upb_fielddef_realcontainingoneof(f);
size_t offset = get_field_offset(desc->layout, f);
if (oneof) {
size_t oneof_case_offset =
desc->layout->oneofs[upb_oneofdef_index(oneof)].case_offset +
sizeof(MessageHeader);
add_handlers_for_oneof_field(h, f, offset, oneof_case_offset, desc);
} else if (is_map_field(f)) {
add_handlers_for_mapfield(h, f, offset, desc);
} else if (upb_fielddef_isseq(f)) {
add_handlers_for_repeated_field(h, desc, f, offset);
} else {
add_handlers_for_singular_field(
desc, h, f, offset,
desc->layout->fields[upb_fielddef_index(f)].hasbit);
}
}
}
// Constructs the handlers for filling a message's data into an in-memory
// object.
const upb_handlers* get_fill_handlers(Descriptor* desc) {
DescriptorPool* pool = ruby_to_DescriptorPool(desc->descriptor_pool);
return upb_handlercache_get(pool->fill_handler_cache, desc->msgdef);
}
static const upb_pbdecodermethod *msgdef_decodermethod(Descriptor* desc) {
DescriptorPool* pool = ruby_to_DescriptorPool(desc->descriptor_pool);
return upb_pbcodecache_get(pool->fill_method_cache, desc->msgdef);
}
static const upb_json_parsermethod *msgdef_jsonparsermethod(Descriptor* desc) {
DescriptorPool* pool = ruby_to_DescriptorPool(desc->descriptor_pool);
return upb_json_codecache_get(pool->json_fill_method_cache, desc->msgdef);
}
static const upb_handlers* msgdef_pb_serialize_handlers(Descriptor* desc) {
DescriptorPool* pool = ruby_to_DescriptorPool(desc->descriptor_pool);
return upb_handlercache_get(pool->pb_serialize_handler_cache, desc->msgdef);
}
static const upb_handlers* msgdef_json_serialize_handlers(
Descriptor* desc, bool preserve_proto_fieldnames) {
DescriptorPool* pool = ruby_to_DescriptorPool(desc->descriptor_pool);
if (preserve_proto_fieldnames) {
return upb_handlercache_get(pool->json_serialize_handler_preserve_cache,
desc->msgdef);
} else {
return upb_handlercache_get(pool->json_serialize_handler_cache,
desc->msgdef);
}
}
// Stack-allocated context during an encode/decode operation. Contains the upb
// environment and its stack-based allocator, an initial buffer for allocations
// to avoid malloc() when possible, and a template for Ruby exception messages
// if any error occurs.
#define STACK_ENV_STACKBYTES 4096
typedef struct {
upb_arena *arena;
upb_status status;
const char* ruby_error_template;
char allocbuf[STACK_ENV_STACKBYTES];
} stackenv;
static void stackenv_init(stackenv* se, const char* errmsg);
static void stackenv_uninit(stackenv* se);
static void stackenv_init(stackenv* se, const char* errmsg) {
se->ruby_error_template = errmsg;
se->arena =
upb_arena_init(se->allocbuf, sizeof(se->allocbuf), &upb_alloc_global);
upb_status_clear(&se->status);
}
static void stackenv_uninit(stackenv* se) {
upb_arena_free(se->arena);
if (!upb_ok(&se->status)) {
// TODO(haberman): have a way to verify that this is actually a parse error,
// instead of just throwing "parse error" unconditionally.
VALUE errmsg = rb_str_new2(upb_status_errmsg(&se->status));
rb_raise(cParseError, se->ruby_error_template, errmsg);
}
}
/*
* call-seq:
* MessageClass.decode(data) => message
*
* Decodes the given data (as a string containing bytes in protocol buffers wire
* format) under the interpretration given by this message class's definition
* and returns a message object with the corresponding field values.
*/
VALUE Message_decode(VALUE klass, VALUE data) {
VALUE descriptor = rb_ivar_get(klass, descriptor_instancevar_interned);
Descriptor* desc = ruby_to_Descriptor(descriptor);
VALUE msgklass = Descriptor_msgclass(descriptor);
VALUE msg_rb;
MessageHeader* msg;
if (TYPE(data) != T_STRING) {
rb_raise(rb_eArgError, "Expected string for binary protobuf data.");
}
msg_rb = initialize_rb_class_with_no_args(msgklass);
TypedData_Get_Struct(msg_rb, MessageHeader, &Message_type, msg);
{
const upb_pbdecodermethod* method = msgdef_decodermethod(desc);
const upb_handlers* h = upb_pbdecodermethod_desthandlers(method);
const upb_msgdef* m = upb_handlers_msgdef(h);
VALUE wrapper = Qnil;
void* ptr = msg;
stackenv se;
upb_sink sink;
upb_pbdecoder* decoder;
stackenv_init(&se, "Error occurred during parsing: %" PRIsVALUE);
if (is_wrapper(m)) {
ptr = &wrapper;
}
upb_sink_reset(&sink, h, ptr);
decoder = upb_pbdecoder_create(se.arena, method, sink, &se.status);
upb_bufsrc_putbuf(RSTRING_PTR(data), RSTRING_LEN(data),
upb_pbdecoder_input(decoder));
stackenv_uninit(&se);
if (is_wrapper(m)) {
msg_rb = ruby_wrapper_type(msgklass, wrapper);
}
}
return msg_rb;
}
/*
* call-seq:
* MessageClass.decode_json(data, options = {}) => message
*
* Decodes the given data (as a string containing bytes in protocol buffers wire
* format) under the interpretration given by this message class's definition
* and returns a message object with the corresponding field values.
*
* @param options [Hash] options for the decoder
* ignore_unknown_fields: set true to ignore unknown fields (default is to
* raise an error)
*/
VALUE Message_decode_json(int argc, VALUE* argv, VALUE klass) {
VALUE descriptor = rb_ivar_get(klass, descriptor_instancevar_interned);
Descriptor* desc = ruby_to_Descriptor(descriptor);
VALUE msgklass = Descriptor_msgclass(descriptor);
VALUE msg_rb;
VALUE data = argv[0];
VALUE ignore_unknown_fields = Qfalse;
MessageHeader* msg;
if (argc < 1 || argc > 2) {
rb_raise(rb_eArgError, "Expected 1 or 2 arguments.");
}
if (argc == 2) {
VALUE hash_args = argv[1];
if (TYPE(hash_args) != T_HASH) {
rb_raise(rb_eArgError, "Expected hash arguments.");
}
ignore_unknown_fields = rb_hash_lookup2(
hash_args, ID2SYM(rb_intern("ignore_unknown_fields")), Qfalse);
}
if (TYPE(data) != T_STRING) {
rb_raise(rb_eArgError, "Expected string for JSON data.");
}
// TODO(cfallin): Check and respect string encoding. If not UTF-8, we need to
// convert, because string handlers pass data directly to message string
// fields.
msg_rb = initialize_rb_class_with_no_args(msgklass);
TypedData_Get_Struct(msg_rb, MessageHeader, &Message_type, msg);
{
const upb_json_parsermethod* method = msgdef_jsonparsermethod(desc);
const upb_handlers* h = get_fill_handlers(desc);
const upb_msgdef* m = upb_handlers_msgdef(h);
stackenv se;
upb_sink sink;
upb_json_parser* parser;
DescriptorPool* pool = ruby_to_DescriptorPool(generated_pool);
stackenv_init(&se, "Error occurred during parsing: %" PRIsVALUE);
if (is_wrapper(m)) {
rb_raise(
rb_eRuntimeError,
"Parsing a wrapper type from JSON at the top level does not work.");
}
upb_sink_reset(&sink, h, msg);
parser = upb_json_parser_create(se.arena, method, pool->symtab, sink,
&se.status, RTEST(ignore_unknown_fields));
upb_bufsrc_putbuf(RSTRING_PTR(data), RSTRING_LEN(data),
upb_json_parser_input(parser));
stackenv_uninit(&se);
}
return msg_rb;
}
// -----------------------------------------------------------------------------
// Serializing.
// -----------------------------------------------------------------------------
/* msgvisitor *****************************************************************/
static void putmsg(VALUE msg, const Descriptor* desc, upb_sink sink, int depth,
bool emit_defaults, bool is_json, bool open_msg);
static upb_selector_t getsel(const upb_fielddef *f, upb_handlertype_t type) {
upb_selector_t ret;
bool ok = upb_handlers_getselector(f, type, &ret);
UPB_ASSERT(ok);
return ret;
}
static void putstr(VALUE str, const upb_fielddef *f, upb_sink sink) {
upb_sink subsink;
if (str == Qnil) return;
assert(BUILTIN_TYPE(str) == RUBY_T_STRING);
// We should be guaranteed that the string has the correct encoding because
// we ensured this at assignment time and then froze the string.
if (upb_fielddef_type(f) == UPB_TYPE_STRING) {
assert(rb_enc_from_index(ENCODING_GET(str)) == kRubyStringUtf8Encoding);
} else {
assert(rb_enc_from_index(ENCODING_GET(str)) == kRubyString8bitEncoding);
}
upb_sink_startstr(sink, getsel(f, UPB_HANDLER_STARTSTR), RSTRING_LEN(str),
&subsink);
upb_sink_putstring(subsink, getsel(f, UPB_HANDLER_STRING), RSTRING_PTR(str),
RSTRING_LEN(str), NULL);
upb_sink_endstr(sink, getsel(f, UPB_HANDLER_ENDSTR));
}
static void putsubmsg(VALUE submsg, const upb_fielddef *f, upb_sink sink,
int depth, bool emit_defaults, bool is_json) {
upb_sink subsink;
VALUE descriptor;
Descriptor* subdesc;
if (submsg == Qnil) return;
descriptor = rb_ivar_get(submsg, descriptor_instancevar_interned);
subdesc = ruby_to_Descriptor(descriptor);
upb_sink_startsubmsg(sink, getsel(f, UPB_HANDLER_STARTSUBMSG), &subsink);
putmsg(submsg, subdesc, subsink, depth + 1, emit_defaults, is_json, true);
upb_sink_endsubmsg(sink, subsink, getsel(f, UPB_HANDLER_ENDSUBMSG));
}
static void putary(VALUE ary, const upb_fielddef* f, upb_sink sink, int depth,
bool emit_defaults, bool is_json) {
upb_sink subsink;
upb_fieldtype_t type = upb_fielddef_type(f);
upb_selector_t sel = 0;
int size;
int i;
VALUE type_class = ruby_to_RepeatedField(ary)->field_type_class;
if (ary == Qnil) return;
if (!emit_defaults && NUM2INT(RepeatedField_length(ary)) == 0) return;
size = NUM2INT(RepeatedField_length(ary));
if (size == 0 && !emit_defaults) return;
upb_sink_startseq(sink, getsel(f, UPB_HANDLER_STARTSEQ), &subsink);
if (upb_fielddef_isprimitive(f)) {
sel = getsel(f, upb_handlers_getprimitivehandlertype(f));
}
for (i = 0; i < size; i++) {
void* memory = RepeatedField_index_native(ary, i);
switch (type) {
#define T(upbtypeconst, upbtype, ctype) \
case upbtypeconst: \
upb_sink_put##upbtype(subsink, sel, *((ctype*)memory)); \
break;
T(UPB_TYPE_FLOAT, float, float)
T(UPB_TYPE_DOUBLE, double, double)
T(UPB_TYPE_BOOL, bool, int8_t)
case UPB_TYPE_ENUM:
T(UPB_TYPE_INT32, int32, int32_t)
T(UPB_TYPE_UINT32, uint32, uint32_t)
T(UPB_TYPE_INT64, int64, int64_t)
T(UPB_TYPE_UINT64, uint64, uint64_t)
case UPB_TYPE_STRING:
case UPB_TYPE_BYTES:
putstr(*((VALUE *)memory), f, subsink);
break;
case UPB_TYPE_MESSAGE: {
VALUE val = native_slot_get(UPB_TYPE_MESSAGE, type_class, memory);
putsubmsg(val, f, subsink, depth, emit_defaults, is_json);
break;
}
#undef T
}
}
upb_sink_endseq(sink, getsel(f, UPB_HANDLER_ENDSEQ));
}
static void put_ruby_value(VALUE value, const upb_fielddef* f, VALUE type_class,
int depth, upb_sink sink, bool emit_defaults,
bool is_json) {
upb_selector_t sel = 0;
if (depth > ENCODE_MAX_NESTING) {
rb_raise(rb_eRuntimeError,
"Maximum recursion depth exceeded during encoding.");
}
if (upb_fielddef_isprimitive(f)) {
sel = getsel(f, upb_handlers_getprimitivehandlertype(f));
}
switch (upb_fielddef_type(f)) {
case UPB_TYPE_INT32:
upb_sink_putint32(sink, sel, NUM2INT(value));
break;
case UPB_TYPE_INT64:
upb_sink_putint64(sink, sel, NUM2LL(value));
break;
case UPB_TYPE_UINT32:
upb_sink_putuint32(sink, sel, NUM2UINT(value));
break;
case UPB_TYPE_UINT64:
upb_sink_putuint64(sink, sel, NUM2ULL(value));
break;
case UPB_TYPE_FLOAT:
upb_sink_putfloat(sink, sel, NUM2DBL(value));
break;
case UPB_TYPE_DOUBLE:
upb_sink_putdouble(sink, sel, NUM2DBL(value));
break;
case UPB_TYPE_ENUM: {
if (TYPE(value) == T_SYMBOL) {
value = rb_funcall(type_class, rb_intern("resolve"), 1, value);
}
upb_sink_putint32(sink, sel, NUM2INT(value));
break;
}
case UPB_TYPE_BOOL:
upb_sink_putbool(sink, sel, value == Qtrue);
break;
case UPB_TYPE_STRING:
case UPB_TYPE_BYTES:
putstr(value, f, sink);
break;
case UPB_TYPE_MESSAGE:
putsubmsg(value, f, sink, depth, emit_defaults, is_json);
}
}
static void putmap(VALUE map, const upb_fielddef* f, upb_sink sink, int depth,
bool emit_defaults, bool is_json) {
Map* self;
upb_sink subsink;
const upb_fielddef* key_field;
const upb_fielddef* value_field;
Map_iter it;
if (map == Qnil) return;
if (!emit_defaults && Map_length(map) == 0) return;
self = ruby_to_Map(map);
upb_sink_startseq(sink, getsel(f, UPB_HANDLER_STARTSEQ), &subsink);
assert(upb_fielddef_type(f) == UPB_TYPE_MESSAGE);
key_field = map_field_key(f);
value_field = map_field_value(f);
for (Map_begin(map, &it); !Map_done(&it); Map_next(&it)) {
VALUE key = Map_iter_key(&it);
VALUE value = Map_iter_value(&it);
upb_status status;
upb_sink entry_sink;
upb_sink_startsubmsg(subsink, getsel(f, UPB_HANDLER_STARTSUBMSG),
&entry_sink);
upb_sink_startmsg(entry_sink);
put_ruby_value(key, key_field, Qnil, depth + 1, entry_sink, emit_defaults,
is_json);
put_ruby_value(value, value_field, self->value_type_class, depth + 1,
entry_sink, emit_defaults, is_json);
upb_sink_endmsg(entry_sink, &status);
upb_sink_endsubmsg(subsink, entry_sink, getsel(f, UPB_HANDLER_ENDSUBMSG));
}
upb_sink_endseq(sink, getsel(f, UPB_HANDLER_ENDSEQ));
}
static const upb_handlers* msgdef_json_serialize_handlers(
Descriptor* desc, bool preserve_proto_fieldnames);
static void putjsonany(VALUE msg_rb, const Descriptor* desc, upb_sink sink,
int depth, bool emit_defaults) {
upb_status status;
MessageHeader* msg = NULL;
const upb_fielddef* type_field = upb_msgdef_itof(desc->msgdef, UPB_ANY_TYPE);
const upb_fielddef* value_field = upb_msgdef_itof(desc->msgdef, UPB_ANY_VALUE);
size_t type_url_offset;
VALUE type_url_str_rb;
const upb_msgdef *payload_type = NULL;
TypedData_Get_Struct(msg_rb, MessageHeader, &Message_type, msg);
upb_sink_startmsg(sink);
/* Handle type url */
type_url_offset = desc->layout->fields[upb_fielddef_index(type_field)].offset;
type_url_str_rb = DEREF(Message_data(msg), type_url_offset, VALUE);
if (RSTRING_LEN(type_url_str_rb) > 0) {
putstr(type_url_str_rb, type_field, sink);
}
{
const char* type_url_str = RSTRING_PTR(type_url_str_rb);
size_t type_url_len = RSTRING_LEN(type_url_str_rb);
DescriptorPool* pool = ruby_to_DescriptorPool(generated_pool);
if (type_url_len <= 20 ||
strncmp(type_url_str, "type.googleapis.com/", 20) != 0) {
rb_raise(rb_eRuntimeError, "Invalid type url: %s", type_url_str);
return;
}
/* Resolve type url */
type_url_str += 20;
type_url_len -= 20;
payload_type = upb_symtab_lookupmsg2(
pool->symtab, type_url_str, type_url_len);
if (payload_type == NULL) {
rb_raise(rb_eRuntimeError, "Unknown type: %s", type_url_str);
return;
}
}
{
uint32_t value_offset;
VALUE value_str_rb;
size_t value_len;
value_offset = desc->layout->fields[upb_fielddef_index(value_field)].offset;
value_str_rb = DEREF(Message_data(msg), value_offset, VALUE);
value_len = RSTRING_LEN(value_str_rb);
if (value_len > 0) {
VALUE payload_desc_rb = get_msgdef_obj(generated_pool, payload_type);
Descriptor* payload_desc = ruby_to_Descriptor(payload_desc_rb);
VALUE payload_class = Descriptor_msgclass(payload_desc_rb);
upb_sink subsink;
bool is_wellknown;
VALUE payload_msg_rb = Message_decode(payload_class, value_str_rb);
is_wellknown =
upb_msgdef_wellknowntype(payload_desc->msgdef) !=
UPB_WELLKNOWN_UNSPECIFIED;
if (is_wellknown) {
upb_sink_startstr(sink, getsel(value_field, UPB_HANDLER_STARTSTR), 0,
&subsink);
}
subsink.handlers =
msgdef_json_serialize_handlers(payload_desc, true);
subsink.closure = sink.closure;
putmsg(payload_msg_rb, payload_desc, subsink, depth, emit_defaults, true,
is_wellknown);
}
}
upb_sink_endmsg(sink, &status);
}
static void putjsonlistvalue(
VALUE msg_rb, const Descriptor* desc,
upb_sink sink, int depth, bool emit_defaults) {
upb_status status;
upb_sink subsink;
MessageHeader* msg = NULL;
const upb_fielddef* f = upb_msgdef_itof(desc->msgdef, 1);
uint32_t offset =
desc->layout->fields[upb_fielddef_index(f)].offset +
sizeof(MessageHeader);
VALUE ary;
TypedData_Get_Struct(msg_rb, MessageHeader, &Message_type, msg);
upb_sink_startmsg(sink);
ary = DEREF(msg, offset, VALUE);
if (ary == Qnil || RepeatedField_size(ary) == 0) {
upb_sink_startseq(sink, getsel(f, UPB_HANDLER_STARTSEQ), &subsink);
upb_sink_endseq(sink, getsel(f, UPB_HANDLER_ENDSEQ));
} else {
putary(ary, f, sink, depth, emit_defaults, true);
}
upb_sink_endmsg(sink, &status);
}
static void putmsg(VALUE msg_rb, const Descriptor* desc,
upb_sink sink, int depth, bool emit_defaults,
bool is_json, bool open_msg) {
MessageHeader* msg;
upb_msg_field_iter i;
upb_status status;
bool json_wrapper = is_wrapper(desc->msgdef) && is_json;
if (is_json &&
upb_msgdef_wellknowntype(desc->msgdef) == UPB_WELLKNOWN_ANY) {
putjsonany(msg_rb, desc, sink, depth, emit_defaults);
return;
}
if (is_json &&
upb_msgdef_wellknowntype(desc->msgdef) == UPB_WELLKNOWN_LISTVALUE) {
putjsonlistvalue(msg_rb, desc, sink, depth, emit_defaults);
return;
}
if (open_msg) {
upb_sink_startmsg(sink);
}
// Protect against cycles (possible because users may freely reassign message
// and repeated fields) by imposing a maximum recursion depth.
if (depth > ENCODE_MAX_NESTING) {
rb_raise(rb_eRuntimeError,
"Maximum recursion depth exceeded during encoding.");
}
TypedData_Get_Struct(msg_rb, MessageHeader, &Message_type, msg);
if (desc != msg->descriptor) {
rb_raise(rb_eArgError,
"The type of given msg is '%s', expect '%s'.",
upb_msgdef_fullname(msg->descriptor->msgdef),
upb_msgdef_fullname(desc->msgdef));
}
for (upb_msg_field_begin(&i, desc->msgdef);
!upb_msg_field_done(&i);
upb_msg_field_next(&i)) {
upb_fielddef *f = upb_msg_iter_field(&i);
const upb_oneofdef* oneof = upb_fielddef_realcontainingoneof(f);
bool is_matching_oneof = false;
uint32_t offset =
desc->layout->fields[upb_fielddef_index(f)].offset +
sizeof(MessageHeader);
if (oneof) {
uint32_t oneof_case =
slot_read_oneof_case(desc->layout, Message_data(msg), oneof);
// For a oneof, check that this field is actually present -- skip all the
// below if not.
if (oneof_case != upb_fielddef_number(f)) {
continue;
}
// Otherwise, fall through to the appropriate singular-field handler
// below.
is_matching_oneof = true;
}
if (is_map_field(f)) {
VALUE map = DEREF(msg, offset, VALUE);
if (map != Qnil || emit_defaults) {
putmap(map, f, sink, depth, emit_defaults, is_json);
}
} else if (upb_fielddef_isseq(f)) {
VALUE ary = DEREF(msg, offset, VALUE);
if (ary != Qnil) {
putary(ary, f, sink, depth, emit_defaults, is_json);
}
} else if (upb_fielddef_isstring(f)) {
VALUE str = DEREF(msg, offset, VALUE);
bool is_default = false;
if (upb_msgdef_syntax(desc->msgdef) == UPB_SYNTAX_PROTO2) {
is_default = layout_has(desc->layout, Message_data(msg), f) == Qfalse;
} else if (upb_msgdef_syntax(desc->msgdef) == UPB_SYNTAX_PROTO3) {
is_default = RSTRING_LEN(str) == 0;
}
if (is_matching_oneof || emit_defaults || !is_default || json_wrapper) {
putstr(str, f, sink);
}
} else if (upb_fielddef_issubmsg(f)) {
// OPT: could try to avoid the layout_get() (which will expand lazy
// wrappers).
VALUE val = layout_get(desc->layout, Message_data(msg), f);
putsubmsg(val, f, sink, depth, emit_defaults, is_json);
} else {
upb_selector_t sel = getsel(f, upb_handlers_getprimitivehandlertype(f));
#define T(upbtypeconst, upbtype, ctype, default_value) \
case upbtypeconst: { \
ctype value = DEREF(msg, offset, ctype); \
bool is_default = false; \
if (upb_fielddef_haspresence(f)) { \
is_default = layout_has(desc->layout, Message_data(msg), f) == Qfalse; \
} else if (upb_msgdef_syntax(desc->msgdef) == UPB_SYNTAX_PROTO3) { \
is_default = default_value == value; \
} \
if (is_matching_oneof || emit_defaults || !is_default || json_wrapper) { \
upb_sink_put##upbtype(sink, sel, value); \
} \
} break;
switch (upb_fielddef_type(f)) {
T(UPB_TYPE_FLOAT, float, float, 0.0)
T(UPB_TYPE_DOUBLE, double, double, 0.0)
T(UPB_TYPE_BOOL, bool, uint8_t, 0)
case UPB_TYPE_ENUM:
T(UPB_TYPE_INT32, int32, int32_t, 0)
T(UPB_TYPE_UINT32, uint32, uint32_t, 0)
T(UPB_TYPE_INT64, int64, int64_t, 0)
T(UPB_TYPE_UINT64, uint64, uint64_t, 0)
case UPB_TYPE_STRING:
case UPB_TYPE_BYTES:
case UPB_TYPE_MESSAGE: rb_raise(rb_eRuntimeError, "Internal error.");
}
#undef T
}
}
{
stringsink* unknown = msg->unknown_fields;
if (unknown != NULL) {
upb_sink_putunknown(sink, unknown->ptr, unknown->len);
}
}
if (open_msg) {
upb_sink_endmsg(sink, &status);
}
}
/*
* call-seq:
* MessageClass.encode(msg) => bytes
*
* Encodes the given message object to its serialized form in protocol buffers
* wire format.
*/
VALUE Message_encode(VALUE klass, VALUE msg_rb) {
VALUE descriptor = rb_ivar_get(klass, descriptor_instancevar_interned);
Descriptor* desc = ruby_to_Descriptor(descriptor);
stringsink sink;
stringsink_init(&sink);
{
const upb_handlers* serialize_handlers =
msgdef_pb_serialize_handlers(desc);
stackenv se;
upb_pb_encoder* encoder;
VALUE ret;
stackenv_init(&se, "Error occurred during encoding: %" PRIsVALUE);
encoder = upb_pb_encoder_create(se.arena, serialize_handlers, sink.sink);
putmsg(msg_rb, desc, upb_pb_encoder_input(encoder), 0, false, false, true);
ret = rb_str_new(sink.ptr, sink.len);
stackenv_uninit(&se);
stringsink_uninit(&sink);
return ret;
}
}
/*
* call-seq:
* MessageClass.encode_json(msg, options = {}) => json_string
*
* Encodes the given message object into its serialized JSON representation.
* @param options [Hash] options for the decoder
* preserve_proto_fieldnames: set true to use original fieldnames (default is to camelCase)
* emit_defaults: set true to emit 0/false values (default is to omit them)
*/
VALUE Message_encode_json(int argc, VALUE* argv, VALUE klass) {
VALUE descriptor = rb_ivar_get(klass, descriptor_instancevar_interned);
Descriptor* desc = ruby_to_Descriptor(descriptor);
VALUE msg_rb;
VALUE preserve_proto_fieldnames = Qfalse;
VALUE emit_defaults = Qfalse;
stringsink sink;
if (argc < 1 || argc > 2) {
rb_raise(rb_eArgError, "Expected 1 or 2 arguments.");
}
msg_rb = argv[0];
if (argc == 2) {
VALUE hash_args = argv[1];
if (TYPE(hash_args) != T_HASH) {
rb_raise(rb_eArgError, "Expected hash arguments.");
}
preserve_proto_fieldnames = rb_hash_lookup2(
hash_args, ID2SYM(rb_intern("preserve_proto_fieldnames")), Qfalse);
emit_defaults = rb_hash_lookup2(
hash_args, ID2SYM(rb_intern("emit_defaults")), Qfalse);
}
stringsink_init(&sink);
{
const upb_handlers* serialize_handlers =
msgdef_json_serialize_handlers(desc, RTEST(preserve_proto_fieldnames));
upb_json_printer* printer;
stackenv se;
VALUE ret;
stackenv_init(&se, "Error occurred during encoding: %" PRIsVALUE);
printer = upb_json_printer_create(se.arena, serialize_handlers, sink.sink);
putmsg(msg_rb, desc, upb_json_printer_input(printer), 0,
RTEST(emit_defaults), true, true);
ret = rb_enc_str_new(sink.ptr, sink.len, rb_utf8_encoding());
stackenv_uninit(&se);
stringsink_uninit(&sink);
return ret;
}
}
static void discard_unknown(VALUE msg_rb, const Descriptor* desc) {
MessageHeader* msg;
upb_msg_field_iter it;
TypedData_Get_Struct(msg_rb, MessageHeader, &Message_type, msg);
{
stringsink* unknown = msg->unknown_fields;
if (unknown != NULL) {
stringsink_uninit(unknown);
msg->unknown_fields = NULL;
}
}
for (upb_msg_field_begin(&it, desc->msgdef);
!upb_msg_field_done(&it);
upb_msg_field_next(&it)) {
upb_fielddef *f = upb_msg_iter_field(&it);
const upb_oneofdef* oneof = upb_fielddef_realcontainingoneof(f);
uint32_t offset =
desc->layout->fields[upb_fielddef_index(f)].offset +
sizeof(MessageHeader);
if (oneof) {
uint32_t oneof_case =
slot_read_oneof_case(desc->layout, Message_data(msg), oneof);
// For a oneof, check that this field is actually present -- skip all the
// below if not.
if (oneof_case != upb_fielddef_number(f)) {
continue;
}
// Otherwise, fall through to the appropriate singular-field handler
// below.
}
if (!upb_fielddef_issubmsg(f)) {
continue;
}
if (is_map_field(f)) {
VALUE map;
Map_iter map_it;
if (!upb_fielddef_issubmsg(map_field_value(f))) continue;
map = DEREF(msg, offset, VALUE);
if (map == Qnil) continue;
for (Map_begin(map, &map_it); !Map_done(&map_it); Map_next(&map_it)) {
VALUE submsg = Map_iter_value(&map_it);
VALUE descriptor = rb_ivar_get(submsg, descriptor_instancevar_interned);
const Descriptor* subdesc = ruby_to_Descriptor(descriptor);
discard_unknown(submsg, subdesc);
}
} else if (upb_fielddef_isseq(f)) {
VALUE ary = DEREF(msg, offset, VALUE);
int size;
int i;
if (ary == Qnil) continue;
size = NUM2INT(RepeatedField_length(ary));
for (i = 0; i < size; i++) {
void* memory = RepeatedField_index_native(ary, i);
VALUE submsg = *((VALUE *)memory);
VALUE descriptor = rb_ivar_get(submsg, descriptor_instancevar_interned);
const Descriptor* subdesc = ruby_to_Descriptor(descriptor);
discard_unknown(submsg, subdesc);
}
} else {
VALUE submsg = DEREF(msg, offset, VALUE);
VALUE descriptor;
const Descriptor* subdesc;
if (submsg == Qnil) continue;
descriptor = rb_ivar_get(submsg, descriptor_instancevar_interned);
subdesc = ruby_to_Descriptor(descriptor);
discard_unknown(submsg, subdesc);
}
}
}
/*
* call-seq:
* Google::Protobuf.discard_unknown(msg)
*
* Discard unknown fields in the given message object and recursively discard
* unknown fields in submessages.
*/
VALUE Google_Protobuf_discard_unknown(VALUE self, VALUE msg_rb) {
VALUE klass = CLASS_OF(msg_rb);
VALUE descriptor = rb_ivar_get(klass, descriptor_instancevar_interned);
Descriptor* desc = ruby_to_Descriptor(descriptor);
if (klass == cRepeatedField || klass == cMap) {
rb_raise(rb_eArgError, "Expected proto msg for discard unknown.");
} else {
discard_unknown(msg_rb, desc);
}
return Qnil;
}