Visual.C.实例代码 01_BinaryView

#include <windows.h> #include <stdio.h> #include <tchar.h> #include "resource.h" //支持文件的尺寸上限 #define SIZE_LIMIT (1024*1024) //全局变量申明 HINSTANCE g_hInst; HWND g_hDlg; TCHAR g_szFile[MAX_PATH]; //函数申明 BOOL WINAPI MainDlgProc(HWND hDlg, UINT uMsg, WPARAM wp, LPARAM lp); BOOL OnCommand(UINT nID); void OnBtnOpen(); void OnBtnSave(); void ErrorBox(LPCTSTR lpMsg, DWORD dwErr); void AppendText(HWND hEdit, LPCTSTR lpText); inline BOOL IsHex(TCHAR ch); //应用程序入口 int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) { //初始化全局变量 g_hInst = hInstance; g_hDlg = NULL; *g_szFile = _T('\0'); //显示对话框 DialogBox(hInstance, MAKEINTRESOURCE(IDD_MAIN), NULL, MainDlgProc); return 0; } //对话框过程 BOOL WINAPI MainDlgProc(HWND hDlg, UINT uMsg, WPARAM wp, LPARAM lp) { BOOL bRet = TRUE; switch(uMsg) { case WM_INITDIALOG: g_hDlg = hDlg; break; case WM_CLOSE: EndDialog(hDlg, 0); break; case WM_COMMAND: bRet = OnCommand(LOWORD(wp)); default: bRet = FALSE; } return bRet; } //按钮事件处理 BOOL OnCommand(UINT nID) { switch(nID) { case IDC_BTN_OPEN: OnBtnOpen(); break; case IDC_BTN_SAVE: OnBtnSave(); break; default: return FALSE; } return TRUE; } //打开文件 void OnBtnOpen() { //初始化打开文件描述结构 OPENFILENAME of = {0}; of.lStructSize = sizeof(of); of.hwndOwner = g_hDlg; of.lpstrFilter = _T("*.*\0*.*\0"); of.lpstrFile = g_szFile; of.nMaxFile = MAX_PATH; of.Flags = OFN_FILEMUSTEXIST; //调用打开对话框选择文件 if(!GetOpenFileName(&of)) return; //打开文件准备读取内容 HANDLE hFile = CreateFile( g_szFile, GENERIC_READ, //只需要读取权限 FILE_SHARE_READ, //允许外部程序读取文件 NULL, OPEN_EXISTING, //只打开已存在的文件 0, NULL); if(hFile == INVALID_HANDLE_VALUE) { ErrorBox(_T("读取文件时发生错误："), GetLastError()); return; } //清空文本框内容 SetDlgItemText(g_hDlg, IDC_EDT_BIN, NULL); SetDlgItemText(g_hDlg, IDC_EDT_CHAR, NULL); //获取文件大小 DWORD dwHi = 0; DWORD dwLo = GetFileSize(hFile, &dwHi); if(dwHi > 0 || dwLo > SIZE_LIMIT) { CloseHandle(hFile); ErrorBox(_T("所选文件太大！"), 0); return; } DWORD dwFileSize = dwLo; //创建缓冲区 byte *pBuffer = new byte[dwLo]; //读取文件到缓冲区 DWORD dwRead = 0; byte *p = pBuffer; while(dwLo > 0 && ReadFile(hFile, p, dwLo, &dwRead, NULL)) { if(dwRead == 0) break; p += dwRead; dwLo -= dwRead; } //获取文本框句柄 HWND hBin = GetDlgItem(g_hDlg, IDC_EDT_BIN); HWND hChar = GetDlgItem(g_hDlg, IDC_EDT_CHAR); //设置文本框最大容纳字符数为不限制 SendMessage(hBin, EM_LIMITTEXT, 0, 0); SendMessage(hChar, EM_LIMITTEXT, 0, 0); //禁止文本框重绘，提高速度 SendMessage(hBin, WM_SETREDRAW, 0, 0); SendMessage(hChar, WM_SETREDRAW, 0, 0); //循环格式化缓冲区 TCHAR szTemp[4096 + 10]; LPTSTR lpTemp = szTemp; TCHAR szChar[4096]; ZeroMemory(szChar, sizeof(szChar)); int nChar = 0; for(UINT i=0; i<dwFileSize; i++) { //只显示可见ascii字符 if(pBuffer[i] <= 20 || pBuffer[i] > 127) szChar[nChar] = _T('.'); else szChar[nChar] = pBuffer[i]; nChar ++; //格式化缓冲字节 _stprintf(lpTemp, _T("%.2X "), pBuffer[i]); lpTemp += 3; if(lpTemp - szTemp >= 4096) { //发送临时文本到文本框 AppendText(hBin, szTemp); lpTemp = szTemp; *szTemp = _T('\0'); AppendText(hChar, szChar); ZeroMemory(szChar, sizeof(szChar)); nChar = 0; } //每16个字符换行 if((i+1) % 16 == 0) { _tcscat(szChar, _T("\r\n")); nChar += 2; _tcscat(lpTemp, _T("\r\n")); lpTemp += 2; } } //释放缓冲区 delete []pBuffer; //添加最后的文本到文本框 AppendText(hBin, szTemp); AppendText(hChar, szChar); //允许文本框重绘，让其显示内容 SendMessage(hBin, WM_SETREDRAW, 1, 0); SendMessage(hChar, WM_SETREDRAW, 1, 0); //关闭文件 CloseHandle(hFile); } //保存文件 void OnBtnSave() { //得到二进制文本框句柄 HWND hEdit = GetDlgItem(g_hDlg, IDC_EDT_BIN); //获取文本长度 int nLen = SendMessage(hEdit, WM_GETTEXTLENGTH, 0, 0); if(nLen == 0) return; //得到要保存的文件 OPENFILENAME of = {0}; of.lStructSize = sizeof(of); of.hwndOwner = g_hDlg; of.lpstrFilter = _T("*.*\0*.*\0"); of.lpstrFile = g_szFile; of.lpstrDefExt = _T("*.txt"); of.nMaxFile = MAX_PATH; of.Flags = OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT; if(!GetSaveFileName(&of)) return; //创建文件，如果文件存在，则覆盖 HANDLE hFile = CreateFile( g_szFile, GENERIC_WRITE, //需要写入权限 0, NULL, CREATE_ALWAYS, //强制创建文件 0, NULL); if(hFile == INVALID_HANDLE_VALUE) { ErrorBox(_T("创建文件时发生错误："), GetLastError()); return; } //将文本保存到缓冲 TCHAR *pBuf = new TCHAR[nLen + 1]; int nGet = SendMessage(hEdit, WM_GETTEXT, nLen, (LPARAM)pBuf); if(nGet != nLen - 1) DebugBreak(); pBuf[nGet] = _T('\0'); //循环将缓冲区文本格式化为二进制字节 TCHAR szChar[3]; TCHAR *pTemp = pBuf; szChar[2] = _T('\0'); TCHAR *pEnd = &szChar[2]; byte nTemp; int i=0; DWORD dwWrite; while(pTemp - pBuf < nLen) { szChar[0] = *pTemp; pTemp ++; szChar[1] = *pTemp; pTemp ++; if(IsHex(szChar[0]) && IsHex(szChar[1])) nTemp = (byte)strtol(szChar, &pEnd, 16); dwWrite = 0; //将字节写入文件 if(!WriteFile(hFile, &nTemp, sizeof(byte), &dwWrite, NULL)) { break; } while((!IsHex(*pTemp)) && pTemp - pBuf < nLen ) pTemp ++; } //释放缓冲区 delete []pBuf; //关闭文件 CloseHandle(hFile); } //格式化错误，并弹出错误对话框 void ErrorBox(LPCTSTR lpMsg, DWORD dwErr) { if(dwErr > 0) { TCHAR szErr[1024] = {0}; _tcscpy(szErr, lpMsg); int nLen = _tcslen(szErr); LPTSTR lpBuf = szErr + nLen; //将错误代码格式化为描述 FormatMessage( FORMAT_MESSAGE_FROM_SYSTEM, NULL, dwErr, LANG_SYSTEM_DEFAULT, lpBuf, sizeof(szErr)/sizeof(*szErr) - nLen, NULL); MessageBox(g_hDlg, szErr, _T("错误"), MB_OK | MB_ICONWARNING); } else { MessageBox(g_hDlg, lpMsg, _T("错误"), MB_OK | MB_ICONWARNING); } } //向文本框追加字符 void AppendText(HWND hEdit, LPCTSTR lpText) { int nTotleLen = SendMessage(hEdit, WM_GETTEXTLENGTH, 0, 0); SendMessage(hEdit, EM_SETSEL, nTotleLen, nTotleLen + 1); SendMessage(hEdit, EM_REPLACESEL, FALSE, (LPARAM)lpText); } //判断一个字符是否为16进制字符 inline BOOL IsHex(TCHAR ch) { return (ch >= _T('0') && ch <= _T('9')) || (ch >= _T('A') && ch <= _T('F')) ; }