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#include <ctype.h>
#include <stdio.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#ifndef __GNUC__
#include <io.h>
#else
#include <unistd.h>
#endif
#include <lzsscomprs.h>
class FileCompress: public LZSSCompress {
int ifd;
int ofd;
int ufd;
int zfd;
public:
FileCompress(char *);
~FileCompress();
unsigned long GetChars(char *, unsigned long len);
unsigned long SendChars(char *, unsigned long len);
void Encode();
void Decode();
};
FileCompress::FileCompress(char *fname)
{
char buf[256];
#ifndef O_BINARY
#define O_BINARY 0
#endif
ufd = open(fname, O_RDWR|O_CREAT|O_BINARY, 00644);
sprintf(buf, "%s.lzs", fname);
zfd = open(buf, O_RDWR|O_CREAT|O_BINARY, 00644);
}
FileCompress::~FileCompress()
{
close(ufd);
close(zfd);
}
unsigned long FileCompress::GetChars(char *buf, unsigned long len)
{
return read(ifd, buf, len);
}
unsigned long FileCompress::SendChars(char *buf, unsigned long len)
{
return write(ofd, buf, len);
}
void FileCompress::Encode()
{
ifd = ufd;
ofd = zfd;
LZSSCompress::Encode();
}
void FileCompress::Decode()
{
ifd = zfd;
ofd = ufd;
LZSSCompress::Decode();
}
int main(int argc, char **argv)
{
int decomp = 0;
SWCompress *fobj;
if (argc != 2) {
fprintf(stderr, "usage: %s <filename|filename.lzs>\n", argv[0]);
exit(1);
}
if (strlen(argv[1]) > 4) {
if (!strcmp(&argv[1][strlen(argv[1])-4], ".lzs")) {
argv[1][strlen(argv[1])-4] = 0;
decomp = 1;
}
}
fobj = new FileCompress(argv[1]);
if (decomp)
fobj->Decode();
else fobj->Encode();
delete fobj;
}
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