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// Protocol Buffers - Google's data interchange format
// Copyright 2023 Google LLC. All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file or at
// https://developers.google.com/open-source/licenses/bsd
#include "upb/reflection/message.h"
#include <string.h>
#include "upb/hash/common.h"
#include "upb/message/accessors.h"
#include "upb/message/map.h"
#include "upb/message/message.h"
#include "upb/mini_table/field.h"
#include "upb/reflection/def.h"
#include "upb/reflection/def_pool.h"
#include "upb/reflection/def_type.h"
#include "upb/reflection/internal/field_def.h"
#include "upb/reflection/message_def.h"
#include "upb/reflection/oneof_def.h"
// Must be last.
#include "upb/port/def.inc"
bool upb_Message_HasFieldByDef(const upb_Message* msg, const upb_FieldDef* f) {
UPB_ASSERT(upb_FieldDef_HasPresence(f));
return upb_Message_HasField(msg, upb_FieldDef_MiniTable(f));
}
const upb_FieldDef* upb_Message_WhichOneof(const upb_Message* msg,
const upb_OneofDef* o) {
const upb_FieldDef* f = upb_OneofDef_Field(o, 0);
if (upb_OneofDef_IsSynthetic(o)) {
UPB_ASSERT(upb_OneofDef_FieldCount(o) == 1);
return upb_Message_HasFieldByDef(msg, f) ? f : NULL;
} else {
const upb_MiniTableField* field = upb_FieldDef_MiniTable(f);
uint32_t oneof_case = upb_Message_WhichOneofFieldNumber(msg, field);
f = oneof_case ? upb_OneofDef_LookupNumber(o, oneof_case) : NULL;
UPB_ASSERT((f != NULL) == (oneof_case != 0));
return f;
}
}
upb_MessageValue upb_Message_GetFieldByDef(const upb_Message* msg,
const upb_FieldDef* f) {
upb_MessageValue default_val = upb_FieldDef_Default(f);
upb_MessageValue ret;
_upb_Message_GetField(msg, upb_FieldDef_MiniTable(f), &default_val, &ret);
return ret;
}
upb_MutableMessageValue upb_Message_Mutable(upb_Message* msg,
const upb_FieldDef* f,
upb_Arena* a) {
UPB_ASSERT(upb_FieldDef_IsSubMessage(f) || upb_FieldDef_IsRepeated(f));
if (upb_FieldDef_HasPresence(f) && !upb_Message_HasFieldByDef(msg, f)) {
// We need to skip the upb_Message_GetFieldByDef() call in this case.
goto make;
}
upb_MessageValue val = upb_Message_GetFieldByDef(msg, f);
if (val.array_val) {
return (upb_MutableMessageValue){.array = (upb_Array*)val.array_val};
}
upb_MutableMessageValue ret;
make:
if (!a) return (upb_MutableMessageValue){.array = NULL};
if (upb_FieldDef_IsMap(f)) {
const upb_MessageDef* entry = upb_FieldDef_MessageSubDef(f);
const upb_FieldDef* key =
upb_MessageDef_FindFieldByNumber(entry, kUpb_MapEntry_KeyFieldNumber);
const upb_FieldDef* value =
upb_MessageDef_FindFieldByNumber(entry, kUpb_MapEntry_ValueFieldNumber);
ret.map =
upb_Map_New(a, upb_FieldDef_CType(key), upb_FieldDef_CType(value));
} else if (upb_FieldDef_IsRepeated(f)) {
ret.array = upb_Array_New(a, upb_FieldDef_CType(f));
} else {
UPB_ASSERT(upb_FieldDef_IsSubMessage(f));
const upb_MessageDef* m = upb_FieldDef_MessageSubDef(f);
ret.msg = upb_Message_New(upb_MessageDef_MiniTable(m), a);
}
val.array_val = ret.array;
upb_Message_SetFieldByDef(msg, f, val, a);
return ret;
}
bool upb_Message_SetFieldByDef(upb_Message* msg, const upb_FieldDef* f,
upb_MessageValue val, upb_Arena* a) {
return _upb_Message_SetField(msg, upb_FieldDef_MiniTable(f), &val, a);
}
void upb_Message_ClearFieldByDef(upb_Message* msg, const upb_FieldDef* f) {
upb_Message_ClearField(msg, upb_FieldDef_MiniTable(f));
}
void upb_Message_ClearByDef(upb_Message* msg, const upb_MessageDef* m) {
upb_Message_Clear(msg, upb_MessageDef_MiniTable(m));
}
bool upb_Message_Next(const upb_Message* msg, const upb_MessageDef* m,
const upb_DefPool* ext_pool, const upb_FieldDef** out_f,
upb_MessageValue* out_val, size_t* iter) {
size_t i = *iter;
size_t n = upb_MessageDef_FieldCount(m);
UPB_UNUSED(ext_pool);
// Iterate over normal fields, returning the first one that is set.
while (++i < n) {
const upb_FieldDef* f = upb_MessageDef_Field(m, i);
const upb_MiniTableField* field = upb_FieldDef_MiniTable(f);
upb_MessageValue val = upb_Message_GetFieldByDef(msg, f);
// Skip field if unset or empty.
if (upb_MiniTableField_HasPresence(field)) {
if (!upb_Message_HasFieldByDef(msg, f)) continue;
} else {
switch (upb_FieldMode_Get(field)) {
case kUpb_FieldMode_Map:
if (!val.map_val || upb_Map_Size(val.map_val) == 0) continue;
break;
case kUpb_FieldMode_Array:
if (!val.array_val || upb_Array_Size(val.array_val) == 0) continue;
break;
case kUpb_FieldMode_Scalar:
if (!_upb_MiniTable_ValueIsNonZero(&val, field)) continue;
break;
}
}
*out_val = val;
*out_f = f;
*iter = i;
return true;
}
if (ext_pool) {
// Return any extensions that are set.
size_t count;
const upb_Message_Extension* ext = _upb_Message_Getexts(msg, &count);
if (i - n < count) {
ext += count - 1 - (i - n);
memcpy(out_val, &ext->data, sizeof(*out_val));
*out_f = upb_DefPool_FindExtensionByMiniTable(ext_pool, ext->ext);
*iter = i;
return true;
}
}
*iter = i;
return false;
}
bool _upb_Message_DiscardUnknown(upb_Message* msg, const upb_MessageDef* m,
int depth) {
size_t iter = kUpb_Message_Begin;
const upb_FieldDef* f;
upb_MessageValue val;
bool ret = true;
if (--depth == 0) return false;
_upb_Message_DiscardUnknown_shallow(msg);
while (upb_Message_Next(msg, m, NULL /*ext_pool*/, &f, &val, &iter)) {
const upb_MessageDef* subm = upb_FieldDef_MessageSubDef(f);
if (!subm) continue;
if (upb_FieldDef_IsMap(f)) {
const upb_FieldDef* val_f = upb_MessageDef_FindFieldByNumber(subm, 2);
const upb_MessageDef* val_m = upb_FieldDef_MessageSubDef(val_f);
upb_Map* map = (upb_Map*)val.map_val;
size_t iter = kUpb_Map_Begin;
if (!val_m) continue;
upb_MessageValue map_key, map_val;
while (upb_Map_Next(map, &map_key, &map_val, &iter)) {
if (!_upb_Message_DiscardUnknown((upb_Message*)map_val.msg_val, val_m,
depth)) {
ret = false;
}
}
} else if (upb_FieldDef_IsRepeated(f)) {
const upb_Array* arr = val.array_val;
size_t i, n = upb_Array_Size(arr);
for (i = 0; i < n; i++) {
upb_MessageValue elem = upb_Array_Get(arr, i);
if (!_upb_Message_DiscardUnknown((upb_Message*)elem.msg_val, subm,
depth)) {
ret = false;
}
}
} else {
if (!_upb_Message_DiscardUnknown((upb_Message*)val.msg_val, subm,
depth)) {
ret = false;
}
}
}
return ret;
}
bool upb_Message_DiscardUnknown(upb_Message* msg, const upb_MessageDef* m,
int maxdepth) {
return _upb_Message_DiscardUnknown(msg, m, maxdepth);
}
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