# encoding_c
[](https://crates.io/crates/encoding_c)
[](https://docs.rs/encoding_c/)
[](https://github.com/hsivonen/encoding_c/blob/master/COPYRIGHT)
encoding_c is an FFI wrapper for [encoding_rs](https://github.com/hsivonen/encoding_rs).
## Bindings for `encoding_rs::mem`
See the [`encoding_c_mem` crate](https://crates.io/crates/encoding_c_mem)
for bindings for `encoding_rs::mem`.
## Licensing
Please see the file named
[COPYRIGHT](https://github.com/hsivonen/encoding_c/blob/master/COPYRIGHT).
## No Unwinding Support!
This crate is meant for use in binaries compiled with `panic = 'abort'`, which
is _required_ for correctness! Unwinding across FFI is Undefined Behavior, and
this crate does nothing to try to prevent unwinding across the FFI if
compiled with unwinding enabled.
## C/C++ Headers
`include/encoding_rs.h` and `include/encoding_rs_statics.h` are needed for C
usage.
`include/encoding_rs_cpp.h` is a sample C++ API built on top of the C API using
GSL and the C++ standard library. Since C++ project typically roll their own
string classes, etc., it's probably necessary for C++ projects to manually
adapt the header to their replacements of standard-library types.
There's a [write-up](https://hsivonen.fi/modern-cpp-in-rust/) about the C++
wrappers.
## Release Notes
### 0.9.6
* Fix a bug in the C++ header.
### 0.9.5
* Adjust documentation for encoding_rs 0.8.20.
### 0.9.4
* Fix bogus C header.
### 0.9.3
* Fix bogus C++ header.
### 0.9.2
* Wrap `Decoder::latin1_byte_compatible_up_to`.
### 0.9.1
* Wrap `Encoding::is_single_byte()`.
* Pass through new feature flags introduced in encoding_rs 0.8.11.
### 0.9.0
* Update to encoding_rs 0.8.0.
### 0.8.0
* Update to encoding_rs 0.7.0.
* Drop `encoding_for_name()`.
* Deal correctly with the `data()` method of `gsl::span` returning `nullptr`.
### 0.7.6
* Rename `ENCODING_RS_NON_NULL_CONST_ENCODING_PTR` to
`ENCODING_RS_NOT_NULL_CONST_ENCODING_PTR`. (Not a breaking change,
because defining that macro broke the build previously, so the
macro couldn't have been used.)
* Use the macro only for statics and not for return values.
### 0.7.5
* Annotate the encoding pointers that should be wrapped with a
same-representation not-null type in C++ as
`ENCODING_RS_NON_NULL_CONST_ENCODING_PTR`.
### 0.7.4
* Wrap `has_pending_state()`.
### 0.7.3
* Use C preprocessor definitions for encoding constant declarations.
### 0.7.2
* Parametrize the struct type names behind C preprocessor definitions.
* Leave it to the user to provide `char16_t`. Avoid including a header for it.
### 0.7.1
* Fix documentation for pointers that get used in
`std::slice::from_raw_parts()`.
### 0.7.0
* Map `None` to `SIZE_MAX` in the max length calculation functions.
### 0.6.0
* Check in the `cheddar`-generated header and comment out the `cheddar`-using
`build.rs`.
### 0.5.0
* Initial release of encoding_c. (I.e. first release with FFI in a distinct
crate.)