compress_dummy.c

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//***************************************************************************
//
// File:
//   $HeadURL$
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// Purpose:
//   [The purpose of this file]
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// Description:
//   [The set of functions, macros, etc. defined in the file]
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#include "../support-lean/compress.h"

#define CHUNK 1024

/* Compress from file source to file dest until EOF on source.
It returns:
     COMPRESS_OK on success,
     COMPRESS_FAIL if the inflate data is invalid or the version is
       incorrect,
     COMPRESS_IO_ERROR is there is an error reading or writing the file
     COMPRESS_NONE if compression is not needed.

   The compression level must be Z_DEFAULT_COMPRESSION,
   or between 0 and 9: 1 gives best speed, 9 gives best compression,
   0 gives no compression at all (the input data is simply copied a
   block at a time). Z_DEFAULT_COMPRESSION requests a default compromise
   between speed and compression (currently equivalent to level 6).
 */
int compress_deflate(FILE *source, FILE *dest, int level)
{
  char buffer[CHUNK];

  for(;;) {
    ssize_t byteRead = read(source, buffer, sizeof(buffer));

    if (byteRead <= 0)
      break;

    fwrite(dest, buffer, byteRead);
  }
  return COMPRESS_NONE;
}

/* Decompress from file source to file dest until stream ends or EOF.
   It returns:
     DECOMPRESS_OK on success,
     DECOMPRESS_FAIL if the deflate data is invalid or the version is
       incorrect,
     DECOMPRESS_IO_ERROR is there is an error reading or writing the file
     DECOMPRESS_NONE if decompression is not needed.
 */
int
compress_inflate(FILE *source, FILE *dest)
{
  return COMPRESS_NONE;
}