1 files changed, 644 insertions, 0 deletions
diff --git a/src/im_binfile.cpp b/src/im_binfile.cpp
new file mode 100644
index 0000000..670623c
--- /dev/null
+++ b/src/im_binfile.cpp
@@ -0,0 +1,644 @@
+/** \file
+ * \brief Binary File Access
+ *
+ * See Copyright Notice in im_lib.h
+ * $Id: im_binfile.cpp,v 1.1 2008/10/17 06:10:16 scuri Exp $
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <memory.h>
+#include <assert.h>
+#include <stdarg.h>
+
+#include "im_util.h"
+#include "im_binfile.h"
+
+
+/**************************************************
+                imBinMemoryFile
+***************************************************/
+
+class imBinMemoryFile: public imBinFileBase
+{
+protected:
+  unsigned long CurrentSize, BufferSize;  
+  unsigned char* Buffer, *CurPos;
+  int Error;
+  float Reallocate;
+  imBinMemoryFileName* file_name;
+
+  unsigned long ReadBuf(void* pValues, unsigned long pSize);
+  unsigned long WriteBuf(void* pValues, unsigned long pSize);
+
+public:
+  void Open(const char* pFileName);
+  void New(const char* pFileName);
+  void Close() {} // Does nothing, the memory belongs to the user
+
+  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;
+};
+
+static imBinFileBase* iBinMemoryFileNewFunc()
+{
+  return new imBinMemoryFile();
+}
+
+void imBinMemoryRelease(unsigned char *buffer)
+{
+  free(buffer);
+}
+
+void imBinMemoryFile::Open(const char* pFileName)
+{
+  this->file_name = (imBinMemoryFileName*)pFileName;
+
+  InitByteOrder(imBinCPUByteOrder());
+  this->IsNew = 0;
+
+  assert(this->file_name->size);
+
+  this->Buffer = this->file_name->buffer;
+  this->BufferSize = this->file_name->size;
+  this->Reallocate = this->file_name->reallocate;
+  this->CurrentSize = this->BufferSize;
+  this->CurPos = this->Buffer;
+  this->Error = 0;
+}
+
+void imBinMemoryFile::New(const char* pFileName)
+{
+  this->file_name = (imBinMemoryFileName*)pFileName;
+
+  InitByteOrder(imBinCPUByteOrder());
+  this->IsNew = 1;
+
+  assert(this->file_name->size);
+
+  this->Buffer = this->file_name->buffer;
+  this->BufferSize = this->file_name->size;
+  this->Reallocate = this->file_name->reallocate;
+  this->CurrentSize = 0;
+
+  if (!this->Buffer)
+  {
+    this->Buffer = (unsigned char*)malloc(this->BufferSize);
+    this->file_name->buffer = this->Buffer;
+  }
+
+  this->CurPos = this->Buffer;
+  this->Error = 0;
+}
+
+unsigned long imBinMemoryFile::ReadBuf(void* pValues, unsigned long pSize)
+{
+  assert(this->Buffer);
+
+  unsigned long lOffset = this->CurPos - this->Buffer;
+
+  this->Error = 0;
+  if (lOffset + pSize > this->CurrentSize)
+  {
+    this->Error = 1;
+    pSize = this->CurrentSize - lOffset;
+  }
+
+  if (pSize)
+  {
+    memcpy(pValues, this->CurPos, pSize);
+    this->CurPos += pSize;
+  }
+
+  return pSize;
+}
+                             
+unsigned long imBinMemoryFile::WriteBuf(void* pValues, unsigned long pSize)
+{
+  assert(this->Buffer);
+
+  unsigned long lOffset = this->CurPos - this->Buffer;
+
+  this->Error = 0;
+  if (lOffset + pSize > this->BufferSize)
+  {
+    if (this->Reallocate != 0.0)
+    {
+      unsigned long nSize = this->BufferSize;
+      while (lOffset + pSize > nSize)
+        nSize += (unsigned long)(this->Reallocate*(float)this->BufferSize);
+
+      this->Buffer = (unsigned char*)realloc(this->Buffer, nSize);
+
+      if (this->Buffer)
+      {
+        this->BufferSize = nSize;
+        this->file_name->buffer = this->Buffer;
+        this->file_name->size = this->BufferSize;
+      }
+      else
+      {
+        this->Buffer = this->file_name->buffer;
+        this->Error = 1;
+        pSize = this->BufferSize - lOffset;
+      }
+      
+      this->CurPos = this->Buffer + lOffset;
+    }
+    else
+    {
+      this->Error = 1;
+      pSize = this->BufferSize - lOffset;
+    }
+  }
+
+  memcpy(this->CurPos, pValues, pSize);
+
+  if (lOffset + pSize > this->CurrentSize)
+    this->CurrentSize = lOffset + pSize;
+
+  this->CurPos += pSize;
+
+  return pSize;
+}
+
+unsigned long imBinMemoryFile::FileSize()
+{
+  assert(this->Buffer);
+  return this->CurrentSize;
+}
+
+int imBinMemoryFile::HasError() const
+{
+  if (!this->Buffer) return 1;
+  return this->Error;
+}
+
+void imBinMemoryFile::SeekTo(unsigned long pOffset)
+{
+  assert(this->Buffer);
+
+  this->Error = 0;
+  if (pOffset > this->BufferSize)
+  {
+    this->Error = 1;
+    return;
+  }
+
+  this->CurPos = this->Buffer + pOffset;
+
+  /* update size if we seek after EOF */
+  if (pOffset > this->CurrentSize)
+    this->CurrentSize = pOffset;
+}
+
+void imBinMemoryFile::SeekFrom(long pOffset)
+{
+  assert(this->Buffer);
+
+  /* remember that offset is usually a negative value in this case */
+
+  this->Error = 0;
+  if (this->CurrentSize + pOffset > this->BufferSize || 
+      (long)this->CurrentSize + pOffset < 0)
+  {
+    this->Error = 1;
+    return;
+  }
+
+  this->CurPos = this->Buffer + this->CurrentSize + pOffset;
+
+  /* update size if we seek after EOF */
+  if (pOffset > 0)
+    this->CurrentSize = this->CurrentSize + pOffset;
+}
+
+void imBinMemoryFile::SeekOffset(long pOffset)
+{
+  assert(this->Buffer);
+  long lOffset = this->CurPos - this->Buffer;
+
+  this->Error = 0;
+  if (lOffset + pOffset < 0 || lOffset + pOffset > (long)this->BufferSize)
+  {
+    this->Error = 1;
+    return;
+  }
+
+  this->CurPos += pOffset;
+
+  /* update size if we seek after EOF */
+  if (lOffset + pOffset > (long)this->CurrentSize)
+    this->CurrentSize = lOffset + pOffset;
+}
+
+unsigned long imBinMemoryFile::Tell() const
+{
+  assert(this->Buffer);
+  unsigned long lOffset = this->CurPos - this->Buffer;
+  return lOffset;
+}
+
+int imBinMemoryFile::EndOfFile() const
+{
+  assert(this->Buffer);
+  unsigned long lOffset = this->CurPos - this->Buffer;
+  return lOffset == this->CurrentSize? 1: 0;
+}
+
+/**************************************************
+                imBinSubFile
+**************************************************/
+
+static imBinFileBase* iBinFileBaseHandle(const char* pFileName);
+
+class imBinSubFile: public imBinFileBase
+{
+protected:
+  imBinFileBase* FileHandle;
+  unsigned long StartOffset;
+
+  unsigned long ReadBuf(void* pValues, unsigned long pSize);
+  unsigned long WriteBuf(void* pValues, unsigned long pSize);
+
+public:
+  void Open(const char* pFileName);
+  void New(const char* pFileName);
+  void Close() {} // Does nothing, the file should be close by the parent file.
+
+  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;
+};
+
+static imBinFileBase* iBinSubFileNewFunc()
+{
+  return new imBinSubFile();
+}
+
+void imBinSubFile::Open(const char* pFileName)
+{
+  this->FileHandle = iBinFileBaseHandle(pFileName);
+  this->FileByteOrder = this->FileByteOrder;
+  this->IsNew = 0;
+  
+  StartOffset = this->FileHandle->Tell();
+}
+
+void imBinSubFile::New(const char* pFileName)
+{
+  this->FileHandle = iBinFileBaseHandle(pFileName);
+  this->FileByteOrder = this->FileByteOrder;
+  this->IsNew = 1;
+  
+  StartOffset = this->FileHandle->Tell();
+}
+
+unsigned long imBinSubFile::FileSize()
+{
+  assert(this->FileHandle);
+  return this->FileHandle->FileSize();
+}
+
+unsigned long imBinSubFile::ReadBuf(void* pValues, unsigned long pSize)
+{
+  assert(this->FileHandle);
+  return this->FileHandle->ReadBuf(pValues, pSize);
+}
+                             
+unsigned long imBinSubFile::WriteBuf(void* pValues, unsigned long pSize)
+{
+  assert(this->FileHandle);
+  return this->FileHandle->WriteBuf(pValues, pSize);
+}
+
+int imBinSubFile::HasError() const
+{
+  assert(this->FileHandle);
+  return this->FileHandle->HasError();
+}
+
+void imBinSubFile::SeekTo(unsigned long pOffset)
+{
+  assert(this->FileHandle);
+  this->FileHandle->SeekTo(StartOffset + pOffset);
+}
+
+void imBinSubFile::SeekOffset(long pOffset)
+{
+  assert(this->FileHandle);
+  this->FileHandle->SeekOffset(pOffset);
+}
+
+void imBinSubFile::SeekFrom(long pOffset)
+{
+  assert(this->FileHandle);
+  this->FileHandle->SeekFrom(pOffset);
+}
+
+unsigned long imBinSubFile::Tell() const
+{
+  assert(this->FileHandle);
+  return this->FileHandle->Tell() - StartOffset;
+}
+
+int imBinSubFile::EndOfFile() const
+{
+  assert(this->FileHandle);
+  return this->FileHandle->EndOfFile();
+}
+
+/**************************************************
+                imBinStreamFile
+**************************************************/
+
+class imBinStreamFile: public imBinFileBase
+{
+protected:
+  FILE* FileHandle;
+
+  unsigned long ReadBuf(void* pValues, unsigned long pSize);
+  unsigned long WriteBuf(void* pValues, unsigned long pSize);
+
+public:
+  void Open(const char* pFileName);
+  void New(const char* pFileName);
+  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;
+};
+
+static imBinFileBase* iBinStreamFileNewFunc()
+{
+  return new imBinStreamFile();
+}
+
+void imBinStreamFile::Open(const char* pFileName)
+{
+  this->FileHandle = fopen(pFileName, "rb");
+  InitByteOrder(imBinCPUByteOrder());
+  this->IsNew = 0;
+}
+
+void imBinStreamFile::New(const char* pFileName)
+{
+  this->FileHandle = fopen(pFileName, "wb");
+  InitByteOrder(imBinCPUByteOrder());
+  this->IsNew = 1;
+}
+
+void imBinStreamFile::Close()
+{
+  if (this->FileHandle) fclose(this->FileHandle);
+}
+
+unsigned long imBinStreamFile::FileSize()
+{
+  assert(this->FileHandle);
+  unsigned long lCurrentPosition = ftell(this->FileHandle);
+  fseek(this->FileHandle, 0L, SEEK_END);
+  unsigned long lSize = ftell(this->FileHandle);
+  fseek(this->FileHandle, lCurrentPosition, SEEK_SET);
+  return lSize;
+}
+
+unsigned long imBinStreamFile::ReadBuf(void* pValues, unsigned long pSize)
+{
+  assert(this->FileHandle);
+	return fread(pValues, 1, pSize, this->FileHandle);
+}
+                             
+unsigned long imBinStreamFile::WriteBuf(void* pValues, unsigned long pSize)
+{
+  assert(this->FileHandle);
+	return fwrite(pValues, 1, pSize, this->FileHandle);
+}
+
+int imBinStreamFile::HasError() const
+{
+  if (!this->FileHandle) return 1;
+  return ferror(this->FileHandle) == 0? 0: 1;
+}
+
+void imBinStreamFile::SeekTo(unsigned long pOffset)
+{
+  assert(this->FileHandle);
+  fseek(this->FileHandle, pOffset, SEEK_SET);
+}
+
+void imBinStreamFile::SeekOffset(long pOffset)
+{
+  assert(this->FileHandle);
+  fseek(this->FileHandle, pOffset, SEEK_CUR);
+}
+
+void imBinStreamFile::SeekFrom(long pOffset)
+{
+  assert(this->FileHandle);
+  fseek(this->FileHandle, pOffset, SEEK_END);
+}
+
+unsigned long imBinStreamFile::Tell() const
+{
+  assert(this->FileHandle);
+  return ftell(this->FileHandle);
+}
+
+int imBinStreamFile::EndOfFile() const
+{
+  assert(this->FileHandle);
+  return feof(this->FileHandle) == 0? 0: 1;
+}
+
+/**************************************************
+                 NewFuncModules
+**************************************************/
+
+/* implemented in "im_sysfile*.cpp" */
+imBinFileBase* iBinSystemFileNewFunc();
+imBinFileBase* iBinSystemFileHandleNewFunc();
+
+#define MAX_MODULES 10
+
+static imBinFileNewFunc iBinFileModule[MAX_MODULES] = 
+{
+  iBinSystemFileNewFunc,
+  iBinStreamFileNewFunc, 
+  iBinMemoryFileNewFunc,
+  iBinSubFileNewFunc,
+  iBinSystemFileHandleNewFunc
+};
+static int iBinFileModuleCount = 5;
+static int iBinFileModuleCurrent = 0; // default module is the first
+
+int imBinFileSetCurrentModule(int pModule)
+{
+  int old_module = iBinFileModuleCurrent;
+
+  if (pModule >= iBinFileModuleCount)
+    return -1;
+
+  iBinFileModuleCurrent = pModule;
+
+  return old_module;
+}
+
+int imBinFileRegisterModule(imBinFileNewFunc pNewFunc)
+{
+  if (iBinFileModuleCount == MAX_MODULES) return -1;
+  int id = iBinFileModuleCount;
+  iBinFileModule[id] = pNewFunc;
+  iBinFileModuleCount++;
+  return id;
+}
+
+/**************************************************
+                 imBinFile
+**************************************************/
+
+struct _imBinFile
+{
+  imBinFileBase* binfile;
+};
+
+imBinFile* imBinFileOpen(const char* pFileName)
+{
+  assert(pFileName);
+
+  assert(iBinFileModuleCurrent < iBinFileModuleCount);
+  assert(iBinFileModuleCurrent < MAX_MODULES);
+
+  imBinFileNewFunc NewFunc = iBinFileModule[iBinFileModuleCurrent];
+  imBinFileBase* binfile = NewFunc();
+
+  binfile->Open(pFileName);
+  if (binfile->HasError())
+  {
+    delete binfile;
+    return NULL;
+  }
+
+  imBinFile* bfile = new imBinFile;
+  bfile->binfile = binfile;
+
+  return bfile;
+}
+
+imBinFile* imBinFileNew(const char* pFileName)
+{
+  assert(pFileName);
+
+  imBinFileNewFunc NewFunc = iBinFileModule[iBinFileModuleCurrent];
+  imBinFileBase* binfile = NewFunc();
+
+  binfile->New(pFileName);
+  if (binfile->HasError())
+  {
+    delete binfile;
+    return NULL;
+  }
+
+  imBinFile* bfile = new imBinFile;
+  bfile->binfile = binfile;
+
+  return bfile;
+}
+
+void imBinFileClose(imBinFile* bfile)
+{
+  assert(bfile);
+  bfile->binfile->Close();
+  delete bfile->binfile;
+  delete bfile;
+}
+
+int imBinFileByteOrder(imBinFile* bfile, int pByteOrder)
+{
+  assert(bfile);
+  return bfile->binfile->InitByteOrder(pByteOrder);
+}
+
+int imBinFileError(imBinFile* bfile)
+{
+  assert(bfile);
+  return bfile->binfile->HasError();
+}
+
+unsigned long imBinFileSize(imBinFile* bfile)
+{
+  assert(bfile);
+  return bfile->binfile->FileSize();
+}
+
+unsigned long imBinFileRead(imBinFile* bfile, void* pValues, unsigned long pCount, int pSizeOf)
+{
+  assert(bfile);
+  return bfile->binfile->Read(pValues, pCount, pSizeOf);
+}
+
+unsigned long imBinFileWrite(imBinFile* bfile, void* pValues, unsigned long pCount, int pSizeOf)
+{
+  assert(bfile);
+  return bfile->binfile->Write(pValues, pCount, pSizeOf);
+}
+
+void imBinFileSeekTo(imBinFile* bfile, unsigned long pOffset)
+{
+  assert(bfile);
+  bfile->binfile->SeekTo(pOffset);
+}
+
+void imBinFileSeekOffset(imBinFile* bfile, long pOffset)
+{
+  assert(bfile);
+  bfile->binfile->SeekOffset(pOffset);
+}
+
+void imBinFileSeekFrom(imBinFile* bfile, long pOffset)
+{
+  assert(bfile);
+  bfile->binfile->SeekFrom(pOffset);
+}
+
+unsigned long imBinFileTell(imBinFile* bfile)
+{
+  assert(bfile);
+  return bfile->binfile->Tell();
+}
+
+int imBinFileEndOfFile(imBinFile* bfile)
+{
+  assert(bfile);
+  return bfile->binfile->EndOfFile();
+}
+
+unsigned long imBinFilePrintf(imBinFile* bfile, char *format, ...)
+{
+  va_list arglist;
+  va_start(arglist, format);
+  char buffer[4096];
+  int size = vsprintf(buffer, format, arglist);
+  return imBinFileWrite(bfile, buffer, size, 1);
+}
+
+static imBinFileBase* iBinFileBaseHandle(const char* pFileName)
+{
+  imBinFile* bfile = (imBinFile*)pFileName;
+  return (imBinFileBase*)bfile->binfile;
+}