/* 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: dk4rle.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 DK4RLE_H_INCLUDED /** Avoid multiple inclusions. */ #define DK4RLE_H_INCLUDED 1 #line 10 "dk4rle.ctr" /** @file dk4rle.h Run length encoder as described in the PS and PDF specifications. Use the dk4rle_init() function to initialize the encoder first. Add binary data byte by byte, use dk4rle_add(). If this function returns DK4_EDSTM_ACCEPT, the byte was successfully stored in the encoder, no further action is necessary. If the function returns DK4_EDSTM_FINISHED, either a run or a sequence of literal bytes was completed; use dk4rle_output() to retrieve the output data. After passing all bytes to the encoder there is probably data in the encoder not yet retrieved. Use the dk4rle_finish() function to check. If the function returns DK4_EDSTM_FINISHED, use dk4rle_output() to retrieve the final output data. */ #include "dk4error.h" /** Run-length encoder. */ typedef struct { unsigned char ob[144]; /**< Buffer for both input and output. */ unsigned char *ib; /**< Pointer to ob[1], input buffer. */ size_t oused; /**< Output buffer size. */ size_t iused; /**< Number of input bytes available. */ size_t ao_si; /**< Index to save bytes from after output. */ size_t ao_ss; /**< Size of buffer part to save after out. */ size_t ao_iu; /**< Number of input bytes after output. */ int ao_st; /**< New state after output. */ int st; /**< Current state. */ int lwo; /**< Flag: Last operation was output. */ int weod; /**< Flag: Write EOD marker at end. */ } dk4_rl_enc_t; #ifdef __cplusplus extern "C" { #endif /** Initialize encoder before using it. @param enc Encoder to initialize. @param weod Flag: Write EOD marker at end of data. @param erp Error report, may be NULL. Error codes: - DK4_E_INVALID_ARGUMENTS if enc is NULL. */ void dk4rle_init(dk4_rl_enc_t *enc, int weod, dk4_er_t *erp); /** Add a single byte to the encoder. @param enc Encoder. @param ibyte Input byte to process. @param erp Error report, may be NULL. @return Action to take, one from: - DK4_EDSTM_ACCEPT
if the input byte was successfully stored in the internal data structures without completing a run. No further action necessary. - DK4_EDSTM_FINISHED
if a run was completed. Use dk4rle_output() to obtain the output data. - DK4_EDSTM_ERROR
if an error occured. Error codes: - DK4_E_INVALID_ARGUMENTS if enc is NULL. */ int dk4rle_add(dk4_rl_enc_t *enc, unsigned char ibyte, dk4_er_t *erp); /** Finish data stream, process final data still stored in the encoder. @param enc Encoder. @param erp Error report, may be NULL. @return Action to take, one from: - DK4_EDSTM_ACCEPT
if the input byte was successfully stored in the internal data structures without completing a run. No further action necessary. - DK4_EDSTM_FINISHED
if a run was completed. Use dk4rle_output() to obtain the output data. - DK4_EDSTM_ERROR
if an error occured. Error codes: - DK4_E_INVALID_ARGUMENTS if enc is NULL. */ int dk4rle_finish(dk4_rl_enc_t *enc, dk4_er_t *erp); /** Retrieve encoder output. @param dptr Address of pointer to set to output bytes, should be initialized to NULL. @param szptr Address of size variable for buffer length, should be initialized to 0. @param enc Encoder. @param erp Error report, may be NULL. @return 1 if there is data available, 0 otherwise. Error codes: - DK4_E_INVALID_ARGUMENTS if enc is NULL. */ int dk4rle_output( const unsigned char **dptr, size_t *szptr, dk4_rl_enc_t *enc, dk4_er_t *erp ); #ifdef __cplusplus } #endif #endif