89 lines
1.5 KiB
C++
89 lines
1.5 KiB
C++
/*
|
|
* Copyright 2005, Haiku.
|
|
* Distributed under the terms of the MIT License.
|
|
*
|
|
* Authors:
|
|
* Michael Lotz <mmlr@mlotz.ch>
|
|
*/
|
|
|
|
/* A BMallocIO similar structure but with less overhead */
|
|
|
|
#ifndef _SIMPLE_MALLOC_IO_H_
|
|
#define _SIMPLE_MALLOC_IO_H_
|
|
|
|
#include <malloc.h>
|
|
|
|
namespace BPrivate {
|
|
|
|
class BSimpleMallocIO {
|
|
public:
|
|
BSimpleMallocIO(size_t size)
|
|
: fSize(size)
|
|
{
|
|
fBuffer = (char *)malloc(size);
|
|
}
|
|
|
|
~BSimpleMallocIO()
|
|
{
|
|
free(fBuffer);
|
|
}
|
|
|
|
void Read(void *buffer)
|
|
{
|
|
memcpy(buffer, fBuffer, fSize);
|
|
}
|
|
|
|
void Read(void *buffer, size_t size)
|
|
{
|
|
memcpy(buffer, fBuffer, size);
|
|
}
|
|
|
|
void ReadAt(off_t pos, void *buffer, size_t size)
|
|
{
|
|
memcpy(buffer, fBuffer + pos, size);
|
|
}
|
|
|
|
void Write(const void *buffer)
|
|
{
|
|
memcpy(fBuffer, buffer, fSize);
|
|
}
|
|
|
|
void Write(const void *buffer, size_t size)
|
|
{
|
|
memcpy(fBuffer, buffer, size);
|
|
}
|
|
|
|
void WriteAt(off_t pos, const void *buffer, size_t size)
|
|
{
|
|
memcpy(fBuffer + pos, buffer, size);
|
|
}
|
|
|
|
status_t SetSize(off_t size)
|
|
{
|
|
fBuffer = (char *)realloc(fBuffer, size);
|
|
if (!fBuffer)
|
|
return B_NO_MEMORY;
|
|
|
|
fSize = size;
|
|
return B_OK;
|
|
}
|
|
|
|
char *Buffer()
|
|
{
|
|
return fBuffer;
|
|
}
|
|
|
|
size_t BufferLength()
|
|
{
|
|
return fSize;
|
|
}
|
|
|
|
private:
|
|
char *fBuffer;
|
|
size_t fSize;
|
|
};
|
|
|
|
} // namespace BPivate
|
|
|
|
#endif // _SIMPLE_MALLOC_IO_H_
|