11 #include "wvlinklist.h"
299 bool flushmemmem(
const void *inmem,
size_t inlen,
void *outmem,
300 size_t *outlen,
bool finish =
false);
434 {
return WvString::null; }
559 : enc(enc), autofree(autofree) { }
560 ~ChainElem() {
if (autofree)
delete enc; }
562 DeclareWvList(ChainElem);
564 ChainElemList encoders;
646 virtual bool _isok()
const;
702 bool do_encode(
WvBuf &in,
WvBuf &out, ChainElem *start_after,
706 #endif // __WVENCODER_H
void set_autofree(WvEncoder *enc, bool autofree)
Sets the autofree state of a particular encoder in the chain.
A WvFastString acts exactly like a WvString, but can take (const char *) strings without needing to a...
bool flush(WvBuf &inbuf, WvBuf &outbuf, bool finish=false)
Flushes the encoder and optionally finishes it.
void seterror(WVSTRING_FORMAT_DECL)
Sets an error condition, then setnotok().
virtual ~WvEncoderChain()
Destroys the encoder chain.
bool flushbufstr(WvBuf &inbuf, WvString &outstr, bool finish=false)
Flushes data through the encoder from a buffer to a string.
virtual bool _encode(WvBuf &in, WvBuf &out, bool flush)
Passes the data through the entire chain of encoders.
void prepend(WvEncoder *enc, bool autofree)
Prepends an encoder to the head of the chain.
bool flushstrmem(WvStringParm instr, void *outmem, size_t *outlen, bool finish=false)
Flushes data through the encoder from a string to memory.
bool reset()
Asks an encoder to reset itself to its initial state at creation time, if supported.
virtual bool _encode(WvBuf &in, WvBuf &out, bool flush)
Template method implementation of encode().
WvString geterror() const
Returns an error message if any is available.
bool flushmembuf(const void *inmem, size_t inlen, WvBuf &outbuf, bool finish=false)
Flushes data through the encoder from memory to a buffer.
bool isfinished() const
Returns true if the encoder can no longer encode data.
virtual bool _isfinished() const
Template method implementation of isfinished().
A very efficient passthrough encoder that just merges the input buffer into the output buffer...
WvString strflushbuf(WvBuf &inbuf, bool finish=false)
Flushes data through the encoder from a buffer to a string.
bool flushstrbuf(WvStringParm instr, WvBuf &outbuf, bool finish=false)
Flushes data through the encoder from a string to a buffer.
bool isok() const
Returns true if the encoder has not encountered an error.
virtual bool _reset()
Template method implementation of reset().
An encoder chain owns a list of encoders that are used in sequence to transform data from a source bu...
virtual bool _encode(WvBuf &in, WvBuf &out, bool flush)
Template method implementation of encode().
size_t buffered()
Returns true if there is data in an internal buffer.
virtual bool _reset()
Template method implementation of reset().
virtual bool _encode(WvBuf &inbuf, WvBuf &outbuf, bool flush)=0
Template method implementation of encode().
size_t bytes_processed()
Returns the number of bytes processed so far.
virtual ~WvEncoder()
Destroys the encoder.
bool get_autofree(WvEncoder *enc) const
Gets the autofree state of a particular encoder in the chain.
virtual WvString _geterror() const
Template method implementation of geterror().
virtual WvString _geterror() const
Returns the error message, if any.
virtual bool _isok() const
Template method implementation of isok().
virtual bool _finish(WvBuf &outbuf)
Template method implementation of finish().
virtual bool _reset()
Resets the chain of encoders.
bool continue_encode(WvBuf &inbuf, WvBuf &outbuf)
"Continues" encoding a buffer.
bool finish(WvBuf &outbuf)
Tells the encoder that NO MORE DATA will ever be encoded.
WvString strflushstr(WvStringParm instr, bool finish=false)
Flushes data through the encoder from a string to a string.
Specialization of WvBufBase for unsigned char type buffers intended for use with raw memory buffers...
void setnotok()
Sets 'okay' to false explicitly.
void setfinished()
Sets 'finished' to true explicitly.
An encoder that discards all of its input.
void append(WvEncoder *enc, bool autofree)
Appends an encoder to the tail of the chain.
WvString strflushmem(const void *inmem, size_t inlen, bool finish=false)
Flushes data through the encoder from memory to a string.
WvEncoder()
Creates a new WvEncoder.
bool encodebufmem(WvBuf &inbuf, void *outmem, size_t *outlen, bool flush=false, bool finish=false)
Encodes data from a buffer to memory.
void seterror(WvStringParm message)
Sets an error condition, then setnotok().
virtual bool _finish(WvBuf &out)
Finishes the chain of encoders.
virtual bool _isok() const
Returns true if the encoder has not encountered an error.
WvEncoderChain()
Creates an initially empty chain of encoders.
virtual bool _reset()
Template method implementation of reset().
bool encode(WvBuf &inbuf, WvBuf &outbuf, bool flush=false, bool finish=false)
Reads data from the input buffer, encodes it, and writes the result to the output buffer...
WvString is an implementation of a simple and efficient printable-string class.
bool flushbufmem(WvBuf &inbuf, void *outmem, size_t *outlen, bool finish=false)
Flushes data through the encoder from a buffer to memory.
bool encodebufstr(WvBuf &inbuf, WvString &outstr, bool flush=false, bool finish=false)
Encodes data from a buffer to a string.
bool flushstrstr(WvStringParm instr, WvString &outstr, bool finish=false)
Flushes data through the encoder from a string to a string.
void zap()
Clears the encoder chain.
void unlink(WvEncoder *enc)
Unlinks the encoder from the chain.
virtual bool _isfinished() const
Returns true if the encoder can no longer encode data.
bool flushmemmem(const void *inmem, size_t inlen, void *outmem, size_t *outlen, bool finish=false)
Flushes data through the encoder from memory to memory.