encdec.cpp

来自「非常好用的五子棋游戏源码」· C++ 代码 · 共 78 行

// Created:10-31-98
// By Jeff Connelly

// The simplest program that uses ComprLib

// Compile: gcc encdec.cpp -o encdec.exe -lcompr

// Include the ComprLib header file
#include "comprlib.h"

// Other header files
#include <stdio.h>

int main (int argc, char* argv[])
{
    if (argc != 4)
    {
        printf ("Encodes a file, a simple ComprLib example\n"
                "\tSIMPLE source encoded decoded\n"
                "SOURCE is encoded as ENCODED\n"
                "ENCODED is is decoded as DECODED\n");
        exit (0);
   }

    // I/O is accomplished by 4 function pointers: 'read_byte', 'write_byte',
    // 'end_of_data', and 'stream_size'.  These can be set directly or
    // via the 'Set()' member function in 'ComprLibFileIO' or 'ComprLibMemIO'
    // C++ classes.
    ComprLibFileIO::Set();      // We are using file I/O

    // Open the files
    ComprLibFileIO::source_file = fopen(argv[1], "rb");
    ComprLibFileIO::dest_file = fopen(argv[2], "wb");

    // See if they were actually opened
    if (!ComprLibFileIO::source_file || !ComprLibFileIO::dest_file)
    {
        printf ("Cannot open file(s)\n");
        exit (1);
    }

    printf ("Encoding...\n");

    // The meat of the program: encode the file.  There are over 40 encoding,
    // decoding, and other functions that can be used.
    lzss_encode();      // LZSS -> Lempel-Ziv-Storer-Szymanski compression

    // The files are not closed automatically, so do it now
    fclose(ComprLibFileIO::source_file);
    fclose(ComprLibFileIO::dest_file);

    // Open the file pointers
    ComprLibFileIO::source_file = fopen(argv[2], "rb");
    ComprLibFileIO::dest_file = fopen(argv[3], "wb");

    // Validate...
    if (!ComprLibFileIO::source_file || !ComprLibFileIO::dest_file)
    {
        printf ("Cannot open file(s)\n");
        exit (2);
    }

    // Decompress
    printf ("Decoding...\n");
    lzss_decode();

    // Finally, close the files again
    fclose(ComprLibFileIO::source_file);
    fclose(ComprLibFileIO::dest_file);

    // End of program!
    return 0;
}