a UTF-8 encoded string
the length of the string, or -1 if the string is nul-terminated[1].
location to store the number of bytes in the input string that were successfully converted, or NULL. Even if the conversion was successful, this may be less than len if there were partial characters at the end of the input. If the error G_CONVERT_ERROR_ILLEGAL_SEQUENCE occurs, the value stored will the byte offset after the last valid input sequence.
the number of bytes stored in the output buffer (not including the terminating nul).
The converted string, or NULL on an error.
GException on failure.
Converts a string from UTF-8 to the encoding used for strings by the C runtime (usually the same as that used by the operating system) in the current locale. On Windows this means the system codepage.