/* WARNING: This file was generated by dkct. Changes you make here will be lost if dkct is run again! You should modify the original source and run dkct on it. Original source: dk4rld.ctr */ /* Copyright (C) 2015-2017, Dirk Krause Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. * Redistributions in binary form must reproduce the above opyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. * Neither the name of the author nor the names of contributors may be used to endorse or promote products derived from this software without specific prior written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ #ifndef DK4RLD_H_INCLUDED /** Avoid multiple inclusions. */ #define DK4RLD_H_INCLUDED 1 #line 9 "dk4rld.ctr" /** @file dk4rld.h Run-length decoder. Use dk4rld_init() to initialize the decoder before feeding data to it. Feed the encoded data into the decoder byte by byte, use the dk4rld_add() function. If the function returns DK4_EDSTM_ACCEPT, the input was successfully stored into the internal data structures, not need for further action. If the function returns DK4_EDSTM_FINISHED, an output secquence was completed, either a run or a literal byte sequence. Use dk4rld_output() to retrieve output data. If the dk4rld_add function returns DK4_EDSTM_STOP, an end of data (EOD) marker was found; do not feed further bytes into the decoder. After feeding all input bytes into the decoder, use dk4rld_finish() to check syntax. If the function returns DK4_EDSTM_ERROR, the input data stream was not properly run-length encoded. */ #include "dk4error.h" /** Run length decoder. */ typedef struct { unsigned char ob[128]; /**< Output buffer. */ size_t oused; /**< Number of used bytes in ob. */ size_t ll; /**< Number of expected bytes. */ int st; /**< Current state. */ } dk4_rl_dec_t; #ifdef __cplusplus extern "C" { #endif /** Initialize decoder. @param dec Decoder to initialize. @param erp Error report, may be NULL. Error codes: - DK4_E_INVALID_ARGUMENTS if enc is NULL. */ void dk4rld_init(dk4_rl_dec_t *dec, dk4_er_t *erp); /** Add one encoded byte to decoder. @param dec Decoder. @param inbyte Byte to process. @param erp Error report, may be NULL. @return Action to take, one from: - DK4_EDSTM_ACCEPT
if the byte was successfully added to the internal data structures, no further action necessary. - DK4_EDSTM_FINISHED
if output is available, use dk4rld_output() to retrieve output. - DK4_EDSTM_STOP
if an EOD marker was detected. Do not feed further bytes to the decoder. - DK4_EDSTM_ERROR
if an error occured. Error codes: - DK4_E_INVALID_ARGUMENTS if enc is NULL. */ int dk4rld_add(dk4_rl_dec_t *dec, unsigned char inbyte, dk4_er_t *erp); /** Finish decoding. @param dec Decoder. @param erp Error report, may be NULL. @return Action to take, one from: - DK4_EDSTM_ACCEPT
if no remaining data is stored in the decoder, no further action necessary. - DK4_EDSTM_FINISHED
if output is available, use dk4rld_output() to retrieve output. - DK4_EDSTM_ERROR
if an error occured. Error codes: - DK4_E_INVALID_ARGUMENTS
if enc is NULL. - DK4_E_SYNTAX
if data indicated by the run-length byte or literally-length byte is missing. */ int dk4rld_finish(dk4_rl_dec_t *dec, dk4_er_t *erp); /** Retrieve decoder output. @param dptr Address of pointer to set to decoder output, should be initialized to NULL. @param szptr Address of variable to receive buffer size, should be initialized to 0. @param dec Decoder. @param erp Error report, may be NULL. @return 1 if data is available, 0 otherwise. Error codes: - DK4_E_INVALID_ARGUMENTS if enc is NULL. */ int dk4rld_output( const unsigned char **dptr, size_t *szptr, dk4_rl_dec_t *dec, dk4_er_t *erp ); #ifdef __cplusplus } #endif #endif