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