protobuf/upb/message/accessors.h

/*
 * Copyright (c) 2009-2022, Google LLC
 * All rights reserved.
 *
 * 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 LLC 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 Google LLC BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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 */

#ifndef UPB_MESSAGE_ACCESSORS_H_
#define UPB_MESSAGE_ACCESSORS_H_

#include "upb/collections/array.h"
#include "upb/message/internal.h"
#include "upb/mini_table/common.h"
#include "upb/mini_table/enum_internal.h"
#include "upb/mini_table/field_internal.h"

// Must be last.
#include "upb/port/def.inc"

#ifdef __cplusplus
extern "C" {
#endif

UPB_INLINE bool _upb_MiniTableField_InOneOf(const upb_MiniTableField* field) {
  return field->presence < 0;
}

UPB_INLINE void _upb_MiniTable_SetPresence(upb_Message* msg,
                                           const upb_MiniTableField* field) {
  if (field->presence > 0) {
    _upb_sethas_field(msg, field);
  } else if (_upb_MiniTableField_InOneOf(field)) {
    *_upb_oneofcase_field(msg, field) = field->number;
  }
}

// EVERYTHING ABOVE THIS LINE IS INTERNAL - DO NOT USE /////////////////////////

void upb_MiniTable_ClearField(upb_Message* msg,
                              const upb_MiniTableField* field);

UPB_INLINE bool upb_MiniTable_HasField(const upb_Message* msg,
                                       const upb_MiniTableField* field) {
  if (_upb_MiniTableField_InOneOf(field)) {
    return _upb_getoneofcase_field(msg, field) == field->number;
  }

  UPB_ASSERT(field->presence > 0);
  return _upb_hasbit_field(msg, field);
}

UPB_INLINE bool upb_MiniTable_GetBool(const upb_Message* msg,
                                      const upb_MiniTableField* field,
                                      bool default_val) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Bool);
  if (default_val && !upb_MiniTable_HasField(msg, field)) return default_val;
  return *UPB_PTR_AT(msg, field->offset, bool);
}

UPB_INLINE void upb_MiniTable_SetBool(upb_Message* msg,
                                      const upb_MiniTableField* field,
                                      bool value) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Bool);
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, bool) = value;
}

UPB_INLINE int32_t upb_MiniTable_GetInt32(const upb_Message* msg,
                                          const upb_MiniTableField* field,
                                          int32_t default_val) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Int32 ||
             field->descriptortype == kUpb_FieldType_SInt32 ||
             field->descriptortype == kUpb_FieldType_SFixed32 ||
             field->descriptortype == kUpb_FieldType_Enum);
  if (default_val && !upb_MiniTable_HasField(msg, field)) return default_val;
  return *UPB_PTR_AT(msg, field->offset, int32_t);
}

UPB_INLINE void upb_MiniTable_SetInt32(upb_Message* msg,
                                       const upb_MiniTableField* field,
                                       int32_t value) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Int32 ||
             field->descriptortype == kUpb_FieldType_SInt32 ||
             field->descriptortype == kUpb_FieldType_SFixed32);
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, int32_t) = value;
}

UPB_INLINE uint32_t upb_MiniTable_GetUInt32(const upb_Message* msg,
                                            const upb_MiniTableField* field,
                                            uint32_t default_val) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_UInt32 ||
             field->descriptortype == kUpb_FieldType_Fixed32);
  if (default_val && !upb_MiniTable_HasField(msg, field)) return default_val;
  return *UPB_PTR_AT(msg, field->offset, uint32_t);
}

UPB_INLINE void upb_MiniTable_SetUInt32(upb_Message* msg,
                                        const upb_MiniTableField* field,
                                        uint32_t value) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_UInt32 ||
             field->descriptortype == kUpb_FieldType_Fixed32);
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, uint32_t) = value;
}

UPB_INLINE void upb_MiniTable_SetEnumProto2(upb_Message* msg,
                                            const upb_MiniTable* msg_mini_table,
                                            const upb_MiniTableField* field,
                                            int32_t value) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Enum);
  UPB_ASSERT(upb_MiniTableEnum_CheckValue(
      upb_MiniTable_GetSubEnumTable(msg_mini_table, field), value));
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, int32_t) = value;
}

UPB_INLINE int64_t upb_MiniTable_GetInt64(const upb_Message* msg,
                                          const upb_MiniTableField* field,
                                          uint64_t default_val) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Int64 ||
             field->descriptortype == kUpb_FieldType_SInt64 ||
             field->descriptortype == kUpb_FieldType_SFixed64);
  if (default_val && !upb_MiniTable_HasField(msg, field)) return default_val;
  return *UPB_PTR_AT(msg, field->offset, int64_t);
}

UPB_INLINE void upb_MiniTable_SetInt64(upb_Message* msg,
                                       const upb_MiniTableField* field,
                                       int64_t value) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Int64 ||
             field->descriptortype == kUpb_FieldType_SInt64 ||
             field->descriptortype == kUpb_FieldType_SFixed64);
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, int64_t) = value;
}

UPB_INLINE uint64_t upb_MiniTable_GetUInt64(const upb_Message* msg,
                                            const upb_MiniTableField* field,
                                            uint64_t default_val) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_UInt64 ||
             field->descriptortype == kUpb_FieldType_Fixed64);
  if (default_val && !upb_MiniTable_HasField(msg, field)) return default_val;
  return *UPB_PTR_AT(msg, field->offset, uint64_t);
}

UPB_INLINE void upb_MiniTable_SetUInt64(upb_Message* msg,
                                        const upb_MiniTableField* field,
                                        uint64_t value) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_UInt64 ||
             field->descriptortype == kUpb_FieldType_Fixed64);
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, uint64_t) = value;
}

UPB_INLINE float upb_MiniTable_GetFloat(const upb_Message* msg,
                                        const upb_MiniTableField* field,
                                        float default_val) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Float);
  if (default_val && !upb_MiniTable_HasField(msg, field)) return default_val;
  return *UPB_PTR_AT(msg, field->offset, float);
}

UPB_INLINE void upb_MiniTable_SetFloat(upb_Message* msg,
                                       const upb_MiniTableField* field,
                                       float value) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Float);
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, float) = value;
}

UPB_INLINE double upb_MiniTable_GetDouble(const upb_Message* msg,
                                          const upb_MiniTableField* field,
                                          double default_val) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Double);
  if (default_val && !upb_MiniTable_HasField(msg, field)) return default_val;
  return *UPB_PTR_AT(msg, field->offset, double);
}

UPB_INLINE void upb_MiniTable_SetDouble(upb_Message* msg,
                                        const upb_MiniTableField* field,
                                        double value) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Double);
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, double) = value;
}

UPB_INLINE upb_StringView
upb_MiniTable_GetString(const upb_Message* msg, const upb_MiniTableField* field,
                        upb_StringView def_val) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Bytes ||
             field->descriptortype == kUpb_FieldType_String);
  if (def_val.size && !upb_MiniTable_HasField(msg, field)) return def_val;
  return *UPB_PTR_AT(msg, field->offset, upb_StringView);
}

UPB_INLINE void upb_MiniTable_SetString(upb_Message* msg,
                                        const upb_MiniTableField* field,
                                        upb_StringView value) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Bytes ||
             field->descriptortype == kUpb_FieldType_String);
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, upb_StringView) = value;
}

UPB_INLINE const upb_Message* upb_MiniTable_GetMessage(
    const upb_Message* msg, const upb_MiniTableField* field,
    upb_Message* default_val) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Message ||
             field->descriptortype == kUpb_FieldType_Group);
  if (default_val && !upb_MiniTable_HasField(msg, field)) return default_val;
  return *UPB_PTR_AT(msg, field->offset, const upb_Message*);
}

UPB_INLINE void upb_MiniTable_SetMessage(upb_Message* msg,
                                         const upb_MiniTable* mini_table,
                                         const upb_MiniTableField* field,
                                         upb_Message* sub_message) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Message ||
             field->descriptortype == kUpb_FieldType_Group);
  UPB_ASSERT(mini_table->subs[field->submsg_index].submsg);
  _upb_MiniTable_SetPresence(msg, field);
  *UPB_PTR_AT(msg, field->offset, const upb_Message*) = sub_message;
}

UPB_INLINE upb_Message* upb_MiniTable_GetMutableMessage(
    upb_Message* msg, const upb_MiniTable* mini_table,
    const upb_MiniTableField* field, upb_Arena* arena) {
  UPB_ASSERT(field->descriptortype == kUpb_FieldType_Message ||
             field->descriptortype == kUpb_FieldType_Group);
  upb_Message* sub_message = *UPB_PTR_AT(msg, field->offset, upb_Message*);
  if (!sub_message) {
    const upb_MiniTable* sub_mini_table =
        mini_table->subs[field->submsg_index].submsg;
    UPB_ASSERT(sub_mini_table);
    sub_message = _upb_Message_New(sub_mini_table, arena);
    *UPB_PTR_AT(msg, field->offset, upb_Message*) = sub_message;
    _upb_MiniTable_SetPresence(msg, field);
  }
  return sub_message;
}

UPB_INLINE const upb_Array* upb_MiniTable_GetArray(
    const upb_Message* msg, const upb_MiniTableField* field) {
  return (const upb_Array*)*UPB_PTR_AT(msg, field->offset, upb_Array*);
}

UPB_INLINE upb_Array* upb_MiniTable_GetMutableArray(
    upb_Message* msg, const upb_MiniTableField* field) {
  return (upb_Array*)*UPB_PTR_AT(msg, field->offset, upb_Array*);
}

void* upb_MiniTable_ResizeArray(upb_Message* msg,
                                const upb_MiniTableField* field, size_t len,
                                upb_Arena* arena);
typedef enum {
  kUpb_GetExtension_Ok,
  kUpb_GetExtension_NotPresent,
  kUpb_GetExtension_ParseError,
  kUpb_GetExtension_OutOfMemory,
} upb_GetExtension_Status;

typedef enum {
  kUpb_GetExtensionAsBytes_Ok,
  kUpb_GetExtensionAsBytes_NotPresent,
  kUpb_GetExtensionAsBytes_EncodeError,
} upb_GetExtensionAsBytes_Status;

// Returns a message extension or promotes an unknown field to
// an extension.
//
// TODO(ferhat): Only supports extension fields that are messages,
// expand support to include non-message types.
upb_GetExtension_Status upb_MiniTable_GetOrPromoteExtension(
    upb_Message* msg, const upb_MiniTableExtension* ext_table,
    int decode_options, upb_Arena* arena,
    const upb_Message_Extension** extension);

// Returns a message extension or unknown field matching the extension
// data as bytes.
//
// If an extension has already been decoded it will be re-encoded
// to bytes.
upb_GetExtensionAsBytes_Status upb_MiniTable_GetExtensionAsBytes(
    const upb_Message* msg, const upb_MiniTableExtension* ext_table,
    int encode_options, upb_Arena* arena, const char** extension_data,
    size_t* len);

typedef enum {
  kUpb_FindUnknown_Ok,
  kUpb_FindUnknown_NotPresent,
  kUpb_FindUnknown_ParseError,
} upb_FindUnknown_Status;

typedef struct {
  upb_FindUnknown_Status status;
  // Start of unknown field data in message arena.
  const char* ptr;
  // Size of unknown field data.
  size_t len;
} upb_FindUnknownRet;

// Finds first occurrence of unknown data by tag id in message.
upb_FindUnknownRet upb_MiniTable_FindUnknown(const upb_Message* msg,
                                             uint32_t field_number);

typedef enum {
  kUpb_UnknownToMessage_Ok,
  kUpb_UnknownToMessage_ParseError,
  kUpb_UnknownToMessage_OutOfMemory,
  kUpb_UnknownToMessage_NotFound,
} upb_UnknownToMessage_Status;

typedef struct {
  upb_UnknownToMessage_Status status;
  upb_Message* message;
} upb_UnknownToMessageRet;

// Promotes unknown data inside message to a upb_Message parsing the unknown.
//
// The unknown data is removed from message after field value is set
// using upb_MiniTable_SetMessage.
upb_UnknownToMessageRet upb_MiniTable_PromoteUnknownToMessage(
    upb_Message* msg, const upb_MiniTable* mini_table,
    const upb_MiniTableField* field, const upb_MiniTable* sub_mini_table,
    int decode_options, upb_Arena* arena);

// Promotes all unknown data that matches field tag id to repeated messages
// in upb_Array.
//
// The unknown data is removed from message after upb_Array is populated.
// Since repeated messages can't be packed we remove each unknown that
// contains the target tag id.
upb_UnknownToMessage_Status upb_MiniTable_PromoteUnknownToMessageArray(
    upb_Message* msg, const upb_MiniTableField* field,
    const upb_MiniTable* mini_table, int decode_options, upb_Arena* arena);

#ifdef __cplusplus
} /* extern "C" */
#endif

#include "upb/port/undef.inc"

#endif  // UPB_MESSAGE_ACCESSORS_H_