pub fn convert_with_fallback(
str_: &[u8],
to_codeset: impl IntoGStr,
from_codeset: impl IntoGStr,
fallback: Option<impl IntoGStr>,
) -> Result<(Slice<u8>, usize), CvtError>Expand description
Converts a string from one character set to another, possibly including fallback sequences for characters not representable in the output. Note that it is not guaranteed that the specification for the fallback sequences in @fallback will be honored. Some systems may do an approximate conversion from @from_codeset to @to_codeset in their iconv() functions, in which case GLib will simply return that approximate conversion.
Note that you should use g_iconv() for streaming conversions. Despite the fact that @bytes_read can return information about partial characters, the g_convert_… functions are not generally suitable for streaming. If the underlying converter maintains internal state, then this won’t be preserved across successive calls to g_convert(), g_convert_with_iconv() or g_convert_with_fallback(). (An example of this is the GNU C converter for CP1255 which does not emit a base character until it knows that the next character is not a mark that could combine with the base character.)
§str
the string to convert.§to_codeset
name of character set into which to convert @str
§from_codeset
character set of @str.
§fallback
UTF-8 string to use in place of characters not
present in the target encoding. (The string must be
representable in the target encoding).
If None, characters not in the target encoding will
be represented as Unicode escapes \uxxxx or \Uxxxxyyyy.
§Returns
If the conversion was successful, a newly allocated buffer
containing the converted string, which must be freed with g_free().
Otherwise [`None`] and @error will be set.§bytes_read
location to store the number of bytes in
the input string that were successfully converted, or None.
Even if the conversion was successful, this may be
less than @len if there were partial characters
at the end of the input.
Converts a string from one character set to another, possibly
including fallback sequences for characters not representable
in the output. Note that it is not guaranteed that the specification
for the fallback sequences in @fallback will be honored. Some
systems may do an approximate conversion from @from_codeset
to @to_codeset in their iconv() functions,
in which case GLib will simply return that approximate conversion.
Note that you should use g_iconv() for streaming conversions. Despite the fact that @bytes_read can return information about partial characters, the g_convert_… functions are not generally suitable for streaming. If the underlying converter maintains internal state, then this won’t be preserved across successive calls to g_convert(), g_convert_with_iconv() or g_convert_with_fallback(). (An example of this is the GNU C converter for CP1255 which does not emit a base character until it knows that the next character is not a mark that could combine with the base character.)
§str
the string to convert.§to_codeset
name of character set into which to convert @str
§from_codeset
character set of @str.
§fallback
UTF-8 string to use in place of characters not
present in the target encoding. (The string must be
representable in the target encoding).
If None, characters not in the target encoding will
be represented as Unicode escapes \uxxxx or \Uxxxxyyyy.
§Returns
If the conversion was successful, a newly allocated buffer
containing the converted string, which must be freed with g_free().
Otherwise [`None`] and @error will be set.§bytes_read
location to store the number of bytes in
the input string that were successfully converted, or None.
Even if the conversion was successful, this may be
less than @len if there were partial characters
at the end of the input.