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/* 7zBuf2.c -- Byte Buffer
2014-08-22 : Igor Pavlov : Public domain */
#include "Precomp.h"
#include <string.h>
#include "7zBuf.h"
void DynBuf_Construct(CDynBuf *p)
{
p->data = 0;
p->size = 0;
p->pos = 0;
}
void DynBuf_SeekToBeg(CDynBuf *p)
{
p->pos = 0;
}
int DynBuf_Write(CDynBuf *p, const Byte *buf, size_t size, ISzAlloc *alloc)
{
if (size > p->size - p->pos)
{
size_t newSize = p->pos + size;
Byte *data;
newSize += newSize / 4;
data = (Byte *)alloc->Alloc(alloc, newSize);
if (data == 0)
return 0;
p->size = newSize;
memcpy(data, p->data, p->pos);
alloc->Free(alloc, p->data);
p->data = data;
}
if (size != 0)
{
memcpy(p->data + p->pos, buf, size);
p->pos += size;
}
return 1;
}
void DynBuf_Free(CDynBuf *p, ISzAlloc *alloc)
{
alloc->Free(alloc, p->data);
p->data = 0;
p->size = 0;
p->pos = 0;
}
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