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<hr><h1>nasb.cpp</h1><div class="fragment"><pre>00001 
00002 
00003 <font class="preprocessor">#include &lt;ctype.h&gt;</font>
00004 <font class="preprocessor">#include &lt;stdio.h&gt;</font>
00005 <font class="preprocessor">#include &lt;fcntl.h&gt;</font>
00006 <font class="preprocessor">#include &lt;errno.h&gt;</font>
00007 
00008 <font class="preprocessor">#ifndef __GNUC__</font>
00009 <font class="preprocessor"></font><font class="preprocessor">#include &lt;io.h&gt;</font>
00010 <font class="preprocessor">#else</font>
00011 <font class="preprocessor"></font><font class="preprocessor">#include &lt;unistd.h&gt;</font>
00012 <font class="preprocessor">#endif</font>
00013 <font class="preprocessor"></font>
00014 <font class="preprocessor">#include &lt;swcomprs.h&gt;</font>
00015 
00016 <font class="keyword">class </font>FileCompress: <font class="keyword">public</font> SWCompress {
00017         <font class="keywordtype">int</font> ifd;
00018         <font class="keywordtype">int</font> ofd;
00019         <font class="keywordtype">int</font> ufd;
00020         <font class="keywordtype">int</font> zfd;
00021 <font class="keyword">public</font>:
00022         FileCompress(<font class="keywordtype">char</font> *);
00023         ~FileCompress();
00024         <font class="keywordtype">int</font> GetChars(<font class="keywordtype">char</font> *, <font class="keywordtype">int</font> len);
00025         <font class="keywordtype">int</font> SendChars(<font class="keywordtype">char</font> *, <font class="keywordtype">int</font> len);
00026         <font class="keywordtype">void</font> Encode();
00027         <font class="keywordtype">void</font> Decode();
00028 };
00029 
00030 
00031 FileCompress::FileCompress(<font class="keywordtype">char</font> *fname) 
00032 {
00033         <font class="keywordtype">char</font> buf[256];
00034 
00035 <font class="preprocessor">#ifndef O_BINARY</font>
00036 <font class="preprocessor"></font><font class="preprocessor">#define O_BINARY 0</font>
00037 <font class="preprocessor"></font><font class="preprocessor">#endif</font>
00038 <font class="preprocessor"></font>
00039         ufd  = open(fname, O_RDWR|O_CREAT|O_BINARY);
00040 
00041         sprintf(buf, <font class="stringliteral">"%s.zzz"</font>, fname);
00042         zfd = open(buf, O_RDWR|O_CREAT|O_BINARY);
00043 }
00044 
00045         
00046 FileCompress::~FileCompress(<font class="keywordtype">char</font> *fname) 
00047 {
00048         close(ufd);
00049         close(zfd);
00050 }
00051 
00052 
00053 <font class="keywordtype">int</font> FileCompress::GetChars(<font class="keywordtype">char</font> *buf, <font class="keywordtype">int</font> len) 
00054 {
00055         <font class="keywordflow">return</font> read(ifd, buf, len);
00056 }
00057 
00058 
00059 <font class="keywordtype">int</font> FileCompress::SendChars(<font class="keywordtype">char</font> *buf, <font class="keywordtype">int</font> len) 
00060 {
00061         <font class="keywordflow">return</font> write(ofd, buf, len);
00062 }
00063 
00064 
00065 <font class="keywordtype">void</font> FileCompress::Encode() 
00066 {
00067         ifd = ufd;
00068         ofd = zfd;
00069 
00070         SWCompress::Encode();
00071 }
00072 
00073 
00074 <font class="keywordtype">void</font> FileCompress::Decode() 
00075 {
00076         ifd = zfd;
00077         ofd = ufd;
00078 
00079         SWCompress::Decode();
00080 }
00081 
00082 
00083 main(<font class="keywordtype">int</font> argc, <font class="keywordtype">char</font> **argv)
00084 {
00085         <font class="keywordtype">int</font> decomp = 0;
00086         SWCompress *fobj;
00087         
00088         <font class="keywordflow">if</font> (argc != 2) {
00089                 fprintf(stderr, <font class="stringliteral">"usage: %s &lt;filename|filename.zzz&gt;\n"</font>, argv[0]);
00090                 exit(1);
00091         }
00092 
00093         <font class="keywordflow">if</font> (strlen(argv[1]) &gt; 4) {
00094                 <font class="keywordflow">if</font> (!strcmp(&amp;argv[1][strlen(argv[1])-4], <font class="stringliteral">".zzz"</font>)) {
00095                         argv[1][strlen(argv[1])-4] = 0;
00096                         decomp = 1;
00097                 }
00098         }
00099                         
00100         fobj = <font class="keyword">new</font> FileCompress(argv[1]);
00101         
00102         <font class="keywordflow">if</font> (decomp)
00103                 fobj-&gt;Decode();
00104         <font class="keywordflow">else</font> fobj-&gt;Encode();
00105 
00106         <font class="keyword">delete</font> fobj;
00107 }
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