为什么我使用zlib deflate在源文件上出现错误?

时间:2010-07-16 00:51:35

标签: c debugging file compression zlib

编辑

  // open output file for writing
  if ( ( outfilefd = fopen( file_name, "w+t" ) ) == NULL )
    {
      fprintf(stderr, "Unable to create file\n");
      exit(1);
    }

写入文件,然后需要压缩。

打开.z文件,然后调用def()

FILE *zipFile;

   if ( ( zipFile = fopen( "C:\\LOGS\\test.txt.z", "w+t" ) ) == NULL )
   {
         fprintf(stderr, "Unable to create file\n");
         exit(1);
   }



   int ret = def(outfilefd, zipFile, Z_DEFAULT_COMPRESSION);
        if (ret != Z_OK)
            printf("ZLIB Error");

使用def(),直接来自site

 int def(FILE *source, FILE *dest, int level)
    {
        int ret, flush;
        unsigned have;
        z_stream strm;
        unsigned char in[CHUNK];
        unsigned char out[CHUNK];

        /* allocate deflate state */
        strm.zalloc = Z_NULL;
        strm.zfree = Z_NULL;
        strm.opaque = Z_NULL;
        ret = deflateInit(&strm, level);
        if (ret != Z_OK)
            return ret;

        /* compress until end of file */
        do {

            strm.avail_in = fread(in, 1, CHUNK, source);
      int g = ferror(source);//<---------------- EROR HERE returning 32?
            if (ferror(source)) {
                (void)deflateEnd(&strm);
                return Z_ERRNO;
            }

zipFile不为空,strm.avail_in = 16343,in有数据但ferror(source)返回32?

编辑 - 同样strm.avail_in = 16343引起了我的注意,CHUNK = 16384 ....是吗?

感谢任何想法或帮助。

谢谢。

1 个答案:

答案 0 :(得分:2)

您应该以二进制模式而不是文本模式打开文件:

zipFile = fopen( "C:\\LOGS\\test.txt.z", "w+b" )