zlib.inc

本代码为LZW算法的C语言实现程序

      *  ZLIB.INC - Interface to the general purpose compression library
      *
      *  ILE RPG400 version by Patrick Monnerat, DATASPHERE.
      *  Version 1.2.2
      *
      *
      *  WARNING:
      *     Procedures inflateInit(), inflateInit2(), deflateInit(),
      *         deflateInit2() and inflateBackInit() need to be called with
      *         two additional arguments:
      *         the package version string and the stream control structure.
      *         size. This is needed because RPG lacks some macro feature.
      *         Call these procedures as:
      *             inflateInit(...: ZLIB_VERSION: %size(z_stream))
      *
      /if not defined(ZLIB_H_)
      /define ZLIB_H_
      *
      **************************************************************************
      *                               Constants
      **************************************************************************
      *
     D ZLIB_VERSION    C                   '1.2.2'                            Header's version
     D ZLIB_VERNUM     C                   X'1220'
      *
     D Z_NO_FLUSH      C                   0
     D Z_SYNC_FLUSH    C                   2
     D Z_FULL_FLUSH    C                   3
     D Z_FINISH        C                   4
     D Z_BLOCK         C                   5
      *
     D Z_OK            C                   0
     D Z_STREAM_END    C                   1
     D Z_NEED_DICT     C                   2
     D Z_ERRNO         C                   -1
     D Z_STREAM_ERROR  C                   -2
     D Z_DATA_ERROR    C                   -3
     D Z_MEM_ERROR     C                   -4
     D Z_BUF_ERROR     C                   -5
     DZ_VERSION_ERROR  C                   -6
      *
     D Z_NO_COMPRESSION...
     D                 C                   0
     D Z_BEST_SPEED    C                   1
     D Z_BEST_COMPRESSION...
     D                 C                   9
     D Z_DEFAULT_COMPRESSION...
     D                 C                   -1
      *
     D Z_FILTERED      C                   1
     D Z_HUFFMAN_ONLY  C                   2
     D Z_RLE           C                   3
     D Z_DEFAULT_STRATEGY...
     D                 C                   0
      *
     D Z_BINARY        C                   0
     D Z_ASCII         C                   1
     D Z_UNKNOWN       C                   2
      *
     D Z_DEFLATED      C                   8
      *
     D Z_NULL          C                   0
      *
      **************************************************************************
      *                                 Types
      **************************************************************************
      *
     D z_streamp       S               *                                        Stream struct ptr
     D gzFile          S               *                                        File pointer
     D z_off_t         S             10i 0                                      Stream offsets
      *
      **************************************************************************
      *                               Structures
      **************************************************************************
      *
      *  The GZIP encode/decode stream support structure.
      *
     D z_stream        DS                  align based(z_streamp)
     D  zs_next_in                     *                                        Next input byte
     D  zs_avail_in                  10U 0                                      Byte cnt at next_in
     D  zs_total_in                  10U 0                                      Total bytes read
     D  zs_next_out                    *                                        Output buffer ptr
     D  zs_avail_out                 10U 0                                      Room left @ next_out
     D  zs_total_out                 10U 0                                      Total bytes written
     D  zs_msg                         *                                        Last errmsg or null
     D  zs_state                       *                                        Internal state
     D  zs_zalloc                      *   procptr                              Int. state allocator
     D  zs_free                        *   procptr                              Int. state dealloc.
     D  zs_opaque                      *                                        Private alloc. data
     D  zs_data_type                 10i 0                                      ASC/BIN best guess
     D  zs_adler                     10u 0                                      Uncompr. adler32 val
     D                               10U 0                                      Reserved
     D                               10U 0                                      Ptr. alignment
      *
      **************************************************************************
      *                     Utility function prototypes
      **************************************************************************
      *
     D compress        PR            10I 0 extproc('compress')
     D  dest                      32767    options(*varsize)                    Destination buffer
     D  destLen                      10U 0                                      Destination length
     D  source                    32767    const options(*varsize)              Source buffer
     D  sourceLen                    10u 0 value                                Source length
      *
     D compress2       PR            10I 0 extproc('compress2')
     D  dest                      32767    options(*varsize)                    Destination buffer
     D  destLen                      10U 0                                      Destination length
     D  source                    32767    const options(*varsize)              Source buffer
     D  sourceLen                    10U 0 value                                Source length
     D  level                        10I 0 value                                Compression level
      *
     D compressBound   PR            10U 0 extproc('compressBound')
     D  sourceLen                    10U 0 value
      *
     D uncompress      PR            10I 0 extproc('uncompress')
     D  dest                      32767    options(*varsize)                    Destination buffer
     D  destLen                      10U 0                                      Destination length
     D  source                    32767    const options(*varsize)              Source buffer
     D  sourceLen                    10U 0 value                                Source length
      *
     D gzopen          PR                  extproc('gzopen')
     D                                     like(gzFile)
     D  path                           *   value options(*string)               File pathname
     D  mode                           *   value options(*string)               Open mode
      *
     D gzdopen         PR                  extproc('gzdopen')
     D                                     like(gzFile)
     D  fd                           10i 0 value                                File descriptor
     D  mode                           *   value options(*string)               Open mode
      *
     D gzsetparams     PR            10I 0 extproc('gzsetparams')
     D  file                               value like(gzFile)                   File pointer
     D  level                        10I 0 value
     D  strategy                     10i 0 value
      *
     D gzread          PR            10I 0 extproc('gzread')
     D  file                               value like(gzFile)                   File pointer
     D  buf                       32767    options(*varsize)                    Buffer
     D  len                          10u 0 value                                Buffer length
      *
     D gzwrite         PR            10I 0 extproc('gzwrite')
     D  file                               value like(gzFile)                   File pointer
     D  buf                       32767    const options(*varsize)              Buffer
     D  len                          10u 0 value                                Buffer length
      *
     D gzputs          PR            10I 0 extproc('gzputs')
     D  file                               value like(gzFile)                   File pointer
     D  s                              *   value options(*string)               String to output
      *
     D gzgets          PR              *   extproc('gzgets')
     D  file                               value like(gzFile)                   File pointer
     D  buf                       32767    options(*varsize)                    Read buffer
     D  len                          10i 0 value                                Buffer length
      *
     D gzflush         PR            10i 0 extproc('gzflush')
     D  file                               value like(gzFile)                   File pointer
     D  flush                        10I 0 value                                Type of flush
      *
     D gzseek          PR                  extproc('gzseek')
     D                                     like(z_off_t)
     D  file                               value like(gzFile)                   File pointer
     D  offset                             value like(z_off_t)                  Offset
     D  whence                       10i 0 value                                Origin
      *