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#pragma once
#ifdef __cplusplus
extern "C" {
#endif
struct plain32_base64_state {
int eof;
int bytes;
unsigned char carry;
};
/* Wrapper function to encode a plain string of given length. Output is written
* to *out without trailing zero. Output length in bytes is written to *outlen.
* The buffer in `out` has been allocated by the caller and is at least 4/3 the
* size of the input. See above for `flags`; set to 0 for default operation: */
void plain32_base64_encode
( const char *src
, size_t srclen
, char *out
, size_t *outlen
) ;
/* Call this before calling base64_stream_encode() to init the state. See above
* for `flags`; set to 0 for default operation: */
void plain32_base64_stream_encode_init
( struct plain32_base64_state *state
) ;
/* Encodes the block of data of given length at `src`, into the buffer at
* `out`. Caller is responsible for allocating a large enough out-buffer; it
* must be at least 4/3 the size of the in-buffer, but take some margin. Places
* the number of new bytes written into `outlen` (which is set to zero when the
* function starts). Does not zero-terminate or finalize the output. */
void plain32_base64_stream_encode
( struct plain32_base64_state *state
, const char *src
, size_t srclen
, char *out
, size_t *outlen
) ;
/* Finalizes the output begun by previous calls to `base64_stream_encode()`.
* Adds the required end-of-stream markers if appropriate. `outlen` is modified
* and will contain the number of new bytes written at `out` (which will quite
* often be zero). */
void plain32_base64_stream_encode_final
( struct plain32_base64_state *state
, char *out
, size_t *outlen
) ;
/* Wrapper function to decode a plain string of given length. Output is written
* to *out without trailing zero. Output length in bytes is written to *outlen.
* The buffer in `out` has been allocated by the caller and is at least 3/4 the
* size of the input. See above for `flags`, set to 0 for default operation: */
int plain32_base64_decode
( const char *src
, size_t srclen
, char *out
, size_t *outlen
) ;
/* Call this before calling base64_stream_decode() to init the state. See above
* for `flags`; set to 0 for default operation: */
void plain32_base64_stream_decode_init
( struct plain32_base64_state *state
) ;
/* Decodes the block of data of given length at `src`, into the buffer at
* `out`. Caller is responsible for allocating a large enough out-buffer; it
* must be at least 3/4 the size of the in-buffer, but take some margin. Places
* the number of new bytes written into `outlen` (which is set to zero when the
* function starts). Does not zero-terminate the output. Returns 1 if all is
* well, and 0 if a decoding error was found, such as an invalid character.
* Returns -1 if the chosen codec is not included in the current build. Used by
* the test harness to check whether a codec is available for testing. */
int plain32_base64_stream_decode
( struct plain32_base64_state *state
, const char *src
, size_t srclen
, char *out
, size_t *outlen
) ;
#ifdef __cplusplus
}
#endif
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