355 lines
7.6 KiB
C++
355 lines
7.6 KiB
C++
#include "stdafx.h"
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#ifdef _WIN32
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#include <io.h>
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#define USE_WINDOWS_API
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#include <Windows.h>
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#else
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#include <unistd.h>
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#endif
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#if defined(ANDROID)
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#include <android/log.h>
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#define printf(...) __android_log_print(ANDROID_LOG_VERBOSE, "UI-Console", __VA_ARGS__)
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#endif
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#if defined(_MSC_VER)
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#include <crtdbg.h>
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#else
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#define _ASSERTE(expr) ((void)0)
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#endif
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CFile::CFile() :
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#ifdef USE_WINDOWS_API
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m_hFile(INVALID_HANDLE_VALUE),
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#else
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m_hFile(NULL),
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#endif
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m_bCloseOnDelete(false)
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{
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}
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CFile::CFile(void * hFile) :
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m_hFile(hFile),
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m_bCloseOnDelete(true)
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{
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if (hFile == 0)
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{
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_ASSERTE(hFile != 0);
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}
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}
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CFile::CFile(const char * lpszFileName, uint32_t nOpenFlags) :
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#ifdef USE_WINDOWS_API
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m_hFile(INVALID_HANDLE_VALUE),
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#else
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m_hFile(NULL),
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#endif
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m_bCloseOnDelete(true)
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{
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Open(lpszFileName, nOpenFlags);
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}
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CFile::~CFile()
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{
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#ifdef USE_WINDOWS_API
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if (m_hFile != INVALID_HANDLE_VALUE && m_bCloseOnDelete)
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#else
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if (m_hFile != NULL && m_bCloseOnDelete)
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#endif
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{
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Close();
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}
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}
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bool CFile::Open(const char * lpszFileName, uint32_t nOpenFlags)
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{
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if (!Close())
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{
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return false;
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}
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if (lpszFileName == NULL || strlen(lpszFileName) == 0)
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{
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return false;
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}
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m_bCloseOnDelete = true;
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#ifdef USE_WINDOWS_API
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m_hFile = INVALID_HANDLE_VALUE;
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ULONG dwAccess = 0;
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switch (nOpenFlags & 3)
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{
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case modeRead:
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dwAccess = GENERIC_READ;
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break;
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case modeWrite:
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dwAccess = GENERIC_WRITE;
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break;
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case modeReadWrite:
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dwAccess = GENERIC_READ | GENERIC_WRITE;
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break;
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default:
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_ASSERTE(false);
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}
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// map share mode
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ULONG dwShareMode = 0;
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dwShareMode = FILE_SHARE_READ | FILE_SHARE_WRITE;
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if ((nOpenFlags & shareDenyWrite) == shareDenyWrite) { dwShareMode &= ~FILE_SHARE_WRITE; }
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if ((nOpenFlags & shareDenyRead) == shareDenyRead) { dwShareMode &= ~FILE_SHARE_READ; }
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if ((nOpenFlags & shareExclusive) == shareExclusive) { dwShareMode = 0; }
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// map modeNoInherit flag
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SECURITY_ATTRIBUTES sa;
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sa.nLength = sizeof(sa);
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sa.lpSecurityDescriptor = NULL;
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sa.bInheritHandle = (nOpenFlags & modeNoInherit) == 0;
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// map creation flags
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ULONG dwCreateFlag = OPEN_EXISTING;
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if (nOpenFlags & modeCreate)
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{
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dwCreateFlag = ((nOpenFlags & modeNoTruncate) != 0) ? OPEN_ALWAYS : CREATE_ALWAYS;
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}
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// attempt file creation
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HANDLE hFile = ::CreateFile(lpszFileName, dwAccess, dwShareMode, &sa, dwCreateFlag, FILE_ATTRIBUTE_NORMAL, NULL);
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if (hFile == INVALID_HANDLE_VALUE)
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{ //#define ERROR_PATH_NOT_FOUND 3L
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//ULONG err = GetLastError();
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return false;
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}
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m_hFile = hFile;
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#else
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if ((nOpenFlags & CFileBase::modeCreate) != CFileBase::modeCreate)
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{
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printf("Checking if %s exists...\n",lpszFileName);
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if (!CPath(lpszFileName).Exists())
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{
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printf("%s does not exist.\n",lpszFileName);
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return false;
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}
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}
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if ((nOpenFlags & CFileBase::modeCreate) == CFileBase::modeCreate)
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{
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CPath file(lpszFileName);
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if (!file.Exists())
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{
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FILE * fp = fopen(lpszFileName,"wb");
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if (fp)
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{
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fclose(fp);
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}
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if (!file.Exists())
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{
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return false;
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}
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}
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}
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if ((nOpenFlags & CFileBase::modeWrite) == CFileBase::modeWrite ||
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(nOpenFlags & CFileBase::modeReadWrite) == CFileBase::modeReadWrite)
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{
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printf("tryinng to open %s (rb+)\n",lpszFileName);
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m_hFile = fopen(lpszFileName, "rb+");
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if (m_hFile != NULL)
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{
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SeekToBegin();
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}
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}
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else if ((nOpenFlags & CFileBase::modeRead) == CFileBase::modeRead)
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{
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printf("tryinng to open %s (rb)\n",lpszFileName);
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m_hFile = fopen(lpszFileName, "rb");
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if (m_hFile != NULL)
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{
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SeekToBegin();
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}
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}
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else
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{
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return false;
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}
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#endif
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m_bCloseOnDelete = true;
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return true;
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}
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bool CFile::Close()
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{
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bool bError = true;
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#ifdef USE_WINDOWS_API
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if (m_hFile != INVALID_HANDLE_VALUE)
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{
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bError = !::CloseHandle(m_hFile);
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}
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m_hFile = INVALID_HANDLE_VALUE;
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#else
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if (m_hFile != NULL)
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{
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fclose((FILE *)m_hFile);
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m_hFile = NULL;
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}
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#endif
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m_bCloseOnDelete = false;
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return bError;
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}
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uint32_t CFile::SeekToEnd(void)
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{
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return Seek(0, CFile::end);
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}
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void CFile::SeekToBegin(void)
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{
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Seek(0, CFile::begin);
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}
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bool CFile::IsOpen(void) const
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{
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#ifdef USE_WINDOWS_API
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return m_hFile != INVALID_HANDLE_VALUE;
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#else
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return m_hFile != NULL;
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#endif
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}
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bool CFile::Flush()
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{
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#ifdef USE_WINDOWS_API
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if (m_hFile == INVALID_HANDLE_VALUE)
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{
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return true;
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}
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return ::FlushFileBuffers(m_hFile) != 0;
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#else
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return fflush((FILE *)m_hFile) == 0;
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#endif
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}
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bool CFile::Write(const void* lpBuf, uint32_t nCount)
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{
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if (nCount == 0)
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{
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return true; // avoid Win32 "null-write" option
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}
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#ifdef USE_WINDOWS_API
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ULONG nWritten = 0;
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if (!::WriteFile(m_hFile, lpBuf, nCount, &nWritten, NULL))
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{
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return false;
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}
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if (nWritten != nCount)
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{
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// Win32s will not return an error all the time (usually DISK_FULL)
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return false;
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}
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#else
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if (fwrite(lpBuf, 1, nCount, (FILE *)m_hFile) != nCount)
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{
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return false;
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}
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#endif
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return true;
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}
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uint32_t CFile::Read(void* lpBuf, uint32_t nCount)
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{
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if (nCount == 0)
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{
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return 0; // avoid Win32 "null-read"
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}
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#ifdef USE_WINDOWS_API
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DWORD dwRead = 0;
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if (!::ReadFile(m_hFile, lpBuf, nCount, &dwRead, NULL))
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{
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return 0;
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}
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return (uint32_t)dwRead;
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#else
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uint32_t res = fread(lpBuf, sizeof(uint8_t), nCount, (FILE *)m_hFile);
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return res;
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#endif
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}
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int32_t CFile::Seek(int32_t lOff, SeekPosition nFrom)
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{
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#ifdef USE_WINDOWS_API
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ULONG dwNew = ::SetFilePointer(m_hFile, lOff, NULL, (ULONG)nFrom);
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if (dwNew == (ULONG)-1)
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{
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return -1;
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}
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return dwNew;
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#else
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if (m_hFile == NULL)
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{
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return -1;
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}
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int origin;
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switch (nFrom)
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{
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case begin: origin = SEEK_SET; break;
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case current: origin = SEEK_CUR; break;
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case end: origin = SEEK_END; break;
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default:
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return -1;
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}
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Flush();
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int res = fseek((FILE *)m_hFile, lOff, origin);
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return res;
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#endif
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}
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uint32_t CFile::GetPosition() const
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{
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#ifdef USE_WINDOWS_API
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return ::SetFilePointer(m_hFile, 0, NULL, FILE_CURRENT);
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#else
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return (uint32_t)ftell((FILE *)m_hFile);
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#endif
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}
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bool CFile::SetLength(uint32_t dwNewLen)
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{
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Seek((int32_t)dwNewLen, begin);
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return SetEndOfFile();
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}
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uint32_t CFile::GetLength() const
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{
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#ifdef USE_WINDOWS_API
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return GetFileSize(m_hFile, 0);
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#else
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uint32_t pos = GetPosition();
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fseek((FILE *)m_hFile, 0, SEEK_END);
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uint32_t FileSize = GetPosition();
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fseek((FILE *)m_hFile, (int32_t)pos, SEEK_SET);
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return FileSize;
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#endif
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}
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bool CFile::SetEndOfFile()
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{
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#ifdef USE_WINDOWS_API
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return ::SetEndOfFile(m_hFile) != 0;
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#else
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Flush();
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#ifdef _WIN32
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return _chsize(_fileno((FILE *)m_hFile),GetPosition()) == 0;
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#else
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return ftruncate(fileno((FILE *)m_hFile),GetPosition()) == 0;
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#endif
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#endif
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} |