1 files changed, 207 insertions, 0 deletions
diff --git a/im/src/im_sysfile_win32.cpp b/im/src/im_sysfile_win32.cpp
new file mode 100755
index 0000000..1daf85b
--- /dev/null
+++ b/im/src/im_sysfile_win32.cpp
@@ -0,0 +1,207 @@
+/** \file
+ * \brief System Dependent Binary File Access.
+ *
+ * See Copyright Notice in im_lib.h
+ * $Id: im_sysfile_win32.cpp,v 1.2 2009/10/01 16:12:24 scuri Exp $
+ */
+
+#include <windows.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <memory.h>
+#include <assert.h>
+
+#include "im_util.h"
+#include "im_binfile.h"
+
+/* not defined in VC6 */
+#ifndef INVALID_SET_FILE_POINTER
+#define INVALID_SET_FILE_POINTER ((DWORD)-1)
+#endif
+
+class imBinSystemFile: public imBinFileBase
+{
+protected:
+  HANDLE FileHandle;
+  int Error;
+
+  unsigned long ReadBuf(void* pValues, unsigned long pSize);
+  unsigned long WriteBuf(void* pValues, unsigned long pSize);
+
+public:
+  virtual void Open(const char* pFileName);
+  virtual void New(const char* pFileName);
+  virtual void Close();
+
+  unsigned long FileSize();
+  int HasError() const;
+  void SeekTo(unsigned long pOffset);
+  void SeekOffset(long pOffset);
+  void SeekFrom(long pOffset);
+  unsigned long Tell() const;
+  int EndOfFile() const;
+};
+
+imBinFileBase* iBinSystemFileNewFunc()
+{
+  return new imBinSystemFile();
+}
+
+void imBinSystemFile::Open(const char* pFileName)
+{
+  this->FileHandle = CreateFile(pFileName, GENERIC_READ, 
+                                           FILE_SHARE_READ, 
+                                           NULL, 
+                                           OPEN_EXISTING,
+                                           FILE_ATTRIBUTE_NORMAL,
+                                           NULL);
+  this->Error = (this->FileHandle == INVALID_HANDLE_VALUE)? 1: 0;
+  SetLastError(NO_ERROR);
+  InitByteOrder(imBinCPUByteOrder());
+  this->IsNew = 0;
+}
+
+void imBinSystemFile::New(const char* pFileName)
+{
+  this->FileHandle = CreateFile(pFileName, GENERIC_READ | GENERIC_WRITE, 
+                                           0, 
+                                           NULL, 
+                                           CREATE_ALWAYS,
+                                           FILE_ATTRIBUTE_NORMAL,
+                                           NULL);
+  this->Error = (this->FileHandle == INVALID_HANDLE_VALUE)? 1: 0;
+  SetLastError(NO_ERROR);
+  InitByteOrder(imBinCPUByteOrder());
+  this->IsNew = 1;
+}
+
+void imBinSystemFile::Close()
+{
+  if (this->FileHandle != INVALID_HANDLE_VALUE) 
+    CloseHandle(this->FileHandle);
+
+  this->FileHandle = INVALID_HANDLE_VALUE;
+  this->Error = 1;
+}
+
+unsigned long imBinSystemFile::FileSize()
+{
+  assert(this->FileHandle != INVALID_HANDLE_VALUE);
+  this->Error = 0;
+  DWORD Size = GetFileSize(this->FileHandle, NULL);
+  if (Size == INVALID_FILE_SIZE)
+    this->Error = 1;
+  return Size;
+}
+
+unsigned long imBinSystemFile::ReadBuf(void* pValues, unsigned long pSize)
+{
+  assert(this->FileHandle != INVALID_HANDLE_VALUE);
+  this->Error = 0;
+  DWORD dwSize = 0;
+  ReadFile(this->FileHandle, pValues, pSize, &dwSize, NULL);
+  if (dwSize != pSize)
+    this->Error = 1;
+  return dwSize;
+}
+                             
+unsigned long imBinSystemFile::WriteBuf(void* pValues, unsigned long pSize)
+{
+  assert(this->FileHandle != INVALID_HANDLE_VALUE);
+  this->Error = 0;
+  DWORD dwSize = 0;
+  WriteFile(this->FileHandle, pValues, pSize, &dwSize, NULL);
+  if (dwSize != pSize)
+    this->Error = 1;
+  return dwSize;
+}
+
+int imBinSystemFile::HasError() const
+{
+  return this->Error;
+}
+        
+void imBinSystemFile::SeekTo(unsigned long pOffset)
+{
+  assert(this->FileHandle != INVALID_HANDLE_VALUE);
+  this->Error = 0;
+  DWORD ret = SetFilePointer(this->FileHandle, pOffset, NULL, FILE_BEGIN);
+  if (ret == INVALID_SET_FILE_POINTER)
+    this->Error = 1;
+}
+
+void imBinSystemFile::SeekOffset(long pOffset)
+{
+  assert(this->FileHandle != INVALID_HANDLE_VALUE);
+  this->Error = 0;
+  DWORD ret = SetFilePointer(this->FileHandle, pOffset, NULL, FILE_CURRENT);
+  if (ret == INVALID_SET_FILE_POINTER)
+    this->Error = 1;
+}
+
+void imBinSystemFile::SeekFrom(long pOffset)
+{
+  assert(this->FileHandle != INVALID_HANDLE_VALUE);
+  this->Error = 0;
+  DWORD ret = SetFilePointer(this->FileHandle, pOffset, NULL, FILE_END);
+  if (ret == INVALID_SET_FILE_POINTER)
+    this->Error = 1;
+}
+
+unsigned long imBinSystemFile::Tell() const
+{
+  assert(this->FileHandle != INVALID_HANDLE_VALUE);
+  return SetFilePointer(this->FileHandle, 0, NULL, FILE_CURRENT);
+}
+
+int imBinSystemFile::EndOfFile() const
+{
+  assert(this->FileHandle != INVALID_HANDLE_VALUE);
+  DWORD cur_pos = SetFilePointer(this->FileHandle, 0, NULL, FILE_CURRENT);
+  DWORD end_pos = SetFilePointer(this->FileHandle, 0, NULL, FILE_END);
+  SetFilePointer(this->FileHandle, cur_pos, NULL, FILE_CURRENT);
+  return (cur_pos == end_pos)? 1: 0;
+}
+
+
+
+class imBinSystemFileHandle: public imBinSystemFile
+{
+public:
+  virtual void Open(const char* pFileName);
+  virtual void New(const char* pFileName);
+  virtual void Close();
+};
+
+imBinFileBase* iBinSystemFileHandleNewFunc()
+{
+  return new imBinSystemFileHandle();
+}
+
+void imBinSystemFileHandle::Open(const char* pFileName)
+{
+  // the file was successfully opened already the client 
+
+  HANDLE file_handle = (HANDLE)pFileName;
+  this->FileHandle = file_handle;
+  InitByteOrder(imBinCPUByteOrder());
+  this->IsNew = 0;
+  this->Error = 0;
+}
+
+void imBinSystemFileHandle::New(const char* pFileName)
+{
+  // the file was successfully opened already the client 
+
+  HANDLE file_handle = (HANDLE)pFileName;
+  this->FileHandle = file_handle;
+  InitByteOrder(imBinCPUByteOrder());
+  this->IsNew = 1;
+  this->Error = 0;
+}
+
+void imBinSystemFileHandle::Close()
+{
+  // does nothing, the client must close the file
+}