THUAI6/CAPI/cpp/grpc/include/upb/util/compare.h

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#ifndef UPB_UTIL_COMPARE_H_
#define UPB_UTIL_COMPARE_H_

#include "upb/def.h"

#ifdef __cplusplus
extern "C"
{
#endif

    // Returns true if unknown fields from the two messages are equal when sorted
    // and varints are made canonical.
    //
    // This function is discouraged, as the comparison is inherently lossy without
    // schema data:
    //
    //  1. We don't know whether delimited fields are sub-messages. Unknown
    //     sub-messages will therefore not have their fields sorted and varints
    //     canonicalized.
    //  2. We don't know about oneof/non-repeated fields, which should semantically
    //     discard every value except the last.

    typedef enum
    {
        kUpb_UnknownCompareResult_Equal = 0,
        kUpb_UnknownCompareResult_NotEqual = 1,
        kUpb_UnknownCompareResult_OutOfMemory = 2,
        kUpb_UnknownCompareResult_MaxDepthExceeded = 3,
    } upb_UnknownCompareResult;

    upb_UnknownCompareResult upb_Message_UnknownFieldsAreEqual(const char* buf1, size_t size1, const char* buf2, size_t size2, int max_depth);

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

#endif /* UPB_UTIL_COMPARE_H_ */