Piotr Grabowski ffd8c8c505 utf8: Print invalid UTF-8 character position ...

Add new validate_with_error_position function
which returns -1 if data is a valid UTF-8 string
or otherwise a byte position of first invalid
character. The position is added to exception
messages of all UTF-8 parsing errors in Scylla.

validate_with_error_position is done in two
passes in order to preserve the same performance
in common case when the string is valid.

2020-09-07 18:11:21 +03:00

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