49 lines
860 B
C
49 lines
860 B
C
/* 7zBuf2.c -- Byte Buffer
|
|
2013-11-12 : 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;
|
|
}
|
|
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;
|
|
}
|