upb/message/compare.h

0001 // Protocol Buffers - Google's data interchange format
0002 // Copyright 2023 Google LLC.  All rights reserved.
0003 //
0004 // Use of this source code is governed by a BSD-style
0005 // license that can be found in the LICENSE file or at
0006 // https://developers.google.com/open-source/licenses/bsd
0007
0008 #ifndef UPB_MESSAGE_COMPARE_H_
0009 #define UPB_MESSAGE_COMPARE_H_
0010
0011 #include <stddef.h>
0012
0013 #include "upb/base/descriptor_constants.h"
0014 #include "upb/message/message.h"
0015 #include "upb/message/value.h"
0016 #include "upb/mini_table/extension.h"
0017 #include "upb/mini_table/field.h"
0018 #include "upb/mini_table/message.h"
0019
0020 // Must be last.
0021 #include "upb/port/def.inc"
0022
0023 enum {
0024   // If set, upb_Message_IsEqual() will attempt to compare unknown fields.
0025   // By its very nature this comparison is inexact.
0026   kUpb_CompareOption_IncludeUnknownFields = (1 << 0)
0027 };
0028
0029 #ifdef __cplusplus
0030 extern "C" {
0031 #endif
0032
0033 // Returns true if no known fields or extensions are set in the message.
0034 UPB_API bool upb_Message_IsEmpty(const upb_Message* msg,
0035                                  const upb_MiniTable* m);
0036
0037 UPB_API bool upb_Message_IsEqual(const upb_Message* msg1,
0038                                  const upb_Message* msg2,
0039                                  const upb_MiniTable* m, int options);
0040
0041 // If |ctype| is a message then |m| must point to its minitable.
0042 UPB_API_INLINE bool upb_MessageValue_IsEqual(upb_MessageValue val1,
0043                                              upb_MessageValue val2,
0044                                              upb_CType ctype,
0045                                              const upb_MiniTable* m,
0046                                              int options) {
0047   switch (ctype) {
0048     case kUpb_CType_Bool:
0049       return val1.bool_val == val2.bool_val;
0050
0051     case kUpb_CType_Float:
0052     case kUpb_CType_Int32:
0053     case kUpb_CType_UInt32:
0054     case kUpb_CType_Enum:
0055       return val1.int32_val == val2.int32_val;
0056
0057     case kUpb_CType_Double:
0058     case kUpb_CType_Int64:
0059     case kUpb_CType_UInt64:
0060       return val1.int64_val == val2.int64_val;
0061
0062     case kUpb_CType_String:
0063     case kUpb_CType_Bytes:
0064       return upb_StringView_IsEqual(val1.str_val, val2.str_val);
0065
0066     case kUpb_CType_Message:
0067       return upb_Message_IsEqual(val1.msg_val, val2.msg_val, m, options);
0068
0069     default:
0070       UPB_UNREACHABLE();
0071       return false;
0072   }
0073 }
0074
0075 #ifdef __cplusplus
0076 } /* extern "C" */
0077 #endif
0078
0079 #include "upb/port/undef.inc"
0080
0081 #endif  // UPB_MESSAGE_COMPARE_H_