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1. Unnecessary floating-point number conversions in coordinate handling:
1.1 converting double to string using absl::StrFormat
1.2 converting string back to double using std::stod
each conversion caused precision loss.
2. Byte order handling issue in WKB parsing:
2.1 using machine endian before properly reading WKB byte order flag
2.2 this caused incorrect interpretation of coordinate values
Solution:
1. Remove unnecessary coordinate value conversions:
1.1 directly use S2LatLng's degrees() value without string formatting
1.2 increase output precision in print_s2point to 15 digits
2. Fix WKB byte order handling:
2.1 read byte order flag first
2.2 set correct byte order before parsing coordinates
Result:
before:
POINT (1.461652102e-231 3.34424828009e-59)
after:
POINT(117.194767000297 36.46326301008)
None
Check List (For Author)
Test
Regression test
Unit Test
Manual test (add detailed scripts or steps below)
No need to test or manual test. Explain why:
This is a refactor/code format and no logic has been changed.
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What problem does this PR solve?
Issue Number: close #46619
Root Cause:
Solution:
Result:
before:
after:
None
Check List (For Author)
Test
Behavior changed:
Does this need documentation?
Check List (For Reviewer who merge this PR)