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<hr><h1>nasb.cpp</h1><div class="fragment"><pre>00001
00002
00003 <font class="preprocessor">#include <ctype.h></font>
00004 <font class="preprocessor">#include <stdio.h></font>
00005 <font class="preprocessor">#include <fcntl.h></font>
00006 <font class="preprocessor">#include <errno.h></font>
00007
00008 <font class="preprocessor">#ifndef __GNUC__</font>
00009 <font class="preprocessor"></font><font class="preprocessor">#include <io.h></font>
00010 <font class="preprocessor">#else</font>
00011 <font class="preprocessor"></font><font class="preprocessor">#include <unistd.h></font>
00012 <font class="preprocessor">#endif</font>
00013 <font class="preprocessor"></font>
00014 <font class="preprocessor">#include <swcomprs.h></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 <filename|filename.zzz>\n"</font>, argv[0]);
00090 exit(1);
00091 }
00092
00093 <font class="keywordflow">if</font> (strlen(argv[1]) > 4) {
00094 <font class="keywordflow">if</font> (!strcmp(&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->Decode();
00104 <font class="keywordflow">else</font> fobj->Encode();
00105
00106 <font class="keyword">delete</font> fobj;
00107 }
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