实现代码：
（1）选择待压缩文件按钮
void CcompressDlg::OnBnClickedButton3() { // TODO: 在此添加控件通知处理程序代码 CString strFile = _T(""); CFileDialog dlgFile(TRUE, NULL, NULL, OFN_HIDEREADONLY, _T("Describe Files (*.cfg)|*.cfg|All Files (*.*)|*.*||"), NULL); if (dlgFile.DoModal()) { strFile = dlgFile.GetPathName(); } UpdateData(true); // 获取数据 path = strFile; UpdateData(false); // 更新数据 }
（2）选择解压缩文件按钮
void CcompressDlg::OnBnClickedButton4() { // TODO: 在此添加控件通知处理程序代码 CString strFile = _T(""); CFileDialog dlgFile(TRUE, NULL, NULL, OFN_HIDEREADONLY, _T("Describe Files (*.cfg)|*.cfg|All Files (*.*)|*.*||"), NULL); if (dlgFile.DoModal()) { strFile = dlgFile.GetPathName(); } UpdateData(true); // 获取数据 path_decompress = strFile; UpdateData(false); // 更新数据 }
（3）压缩按钮
void CcompressDlg::OnBnClickedButton1() { // TODO: 在此添加控件通知处理程序代码 #ifdef _UNICODE LONG len1; len1 = WideCharToMultiByte(CP_ACP, 0, path, -1, NULL, 0, NULL, NULL); char *textPath = (char *)malloc(sizeof(char)*(len1 + 1)); memset(textPath, 0, len1 + 1); WideCharToMultiByte(CP_ACP, 0, path, -1, textPath, len1 + 1, NULL, NULL); #else ptr = new char[str.GetAllocLength() + 1]; #endif err = fopen_s(&ifp, textPath, "rb"); if (err == 0) { printf("Thefile'crt_fopen_s.c'wasopened\n"); } fseek(ifp, 0, SEEK_END); unsigned long len = ftell(ifp); myInLen = len; fseek(ifp, 0, SEEK_SET); cpTemp = (char*)malloc(len * sizeof(char)); fread(cpTemp, sizeof(char), len, ifp); char *in = cpTemp; char *out = (char*)malloc((len + len / 16 + 64 + 3) * sizeof(char)); if (lzo_init() != LZO_E_OK) { printf("internal error - lzo_init() failed !!!\n"); printf("(this usually indicates a compiler bug - try recompiling\nwithout optimizations, and enable '-DLZO_DEBUG' for diagnostics)\n"); } lzo_uint in_len; in_len = len; lzo_memset(in, 0, in_len); lzo_uint out_len; int r; r = lzo1x_1_compress((unsigned char*)in, in_len, (unsigned char*)out, &out_len, wrkmem); char mess[256]; if (r == LZO_E_OK) { sprintf_s(mess, sizeof(mess), "压缩成功！\n\n原文件大小：%lu bytes\n压缩后大小：%lu bytes\n\n解压得到的文件“compress.txt”保存于工程目录下", (unsigned long)in_len, (unsigned long)out_len); MessageBox(CString(mess)); } else { /* this should NEVER happen */ sprintf_s(mess, sizeof(mess), "压缩失败!\n %d\n", r); MessageBox(CString(mess)); } /* check for an incompressible block */ if (out_len >= in_len) { sprintf_s(mess, sizeof(mess), "未压缩！\n"); MessageBox(CString(mess)); } err = fopen_s(&ofp, ".\\compress.txt", "wb"); fwrite(out, sizeof(char), out_len, ofp); fclose(ifp); fclose(ofp); free(cpTemp); free(out); free(textPath); }
（4）解压缩按钮
void CcompressDlg::OnBnClickedButton2() { // TODO: 在此添加控件通知处理程序代码 #ifdef _UNICODE LONG len1; len1 = WideCharToMultiByte(CP_ACP, 0, path_decompress, -1, NULL, 0, NULL, NULL); char *textPath = (char *)malloc(sizeof(char)*(len1 + 1)); memset(textPath, 0, len1 + 1); WideCharToMultiByte(CP_ACP, 0, path_decompress, -1, textPath, len1 + 1, NULL, NULL); #else ptr = new char[str.GetAllocLength() + 1]; #endif err = fopen_s(&ifp, textPath, "rb"); if (err == 0) { printf("Thefile'crt_fopen_s.c'was opened\n"); } fseek(ifp, 0, SEEK_END); unsigned long len = ftell(ifp); fseek(ifp, 0, SEEK_SET); cpTemp = (char*)malloc(len * sizeof(char)); fread(cpTemp, sizeof(char), len, ifp); char *in = cpTemp; char *out = (char *)malloc(len*100* sizeof(char)); memset(out, 0, len * 100 * sizeof(char)); int r; lzo_uint new_len; r = lzo1x_decompress((unsigned char*)in, len, (unsigned char*)out, &new_len, NULL); char mess[256]; if (r == LZO_E_OK && new_len == myInLen) { sprintf_s(mess, sizeof(mess), "解压成功！\n\n待解压文件大小： %lu bytes\n解压后文件大小： %lu bytes\n\n解压得到的文件“decompress.txt”保存于工程目录下", (unsigned long)len, (unsigned long)new_len); MessageBox(CString(mess)); } else { /* this should NEVER happen */ sprintf_s(mess, sizeof(mess), "解压失败！ %d\n", r); MessageBox(CString(mess)); } err = fopen_s(&ofp, ".\\decompress.txt", "wt+"); fwrite(out, sizeof(char), new_len, ofp); fclose(ifp); fclose(ofp); free(cpTemp); free(textPath); free(out); }
