53 lines
970 B
C
Executable File
53 lines
970 B
C
Executable File
/* 7zBuf2.c -- Byte Buffer
|
|
2017-04-03 : 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, ISzAllocPtr alloc)
|
|
{
|
|
if (size > p->size - p->pos)
|
|
{
|
|
size_t newSize = p->pos + size;
|
|
Byte *data;
|
|
newSize += newSize / 4;
|
|
data = (Byte *)ISzAlloc_Alloc(alloc, newSize);
|
|
if (!data)
|
|
return 0;
|
|
p->size = newSize;
|
|
if (p->pos != 0)
|
|
memcpy(data, p->data, p->pos);
|
|
ISzAlloc_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, ISzAllocPtr alloc)
|
|
{
|
|
ISzAlloc_Free(alloc, p->data);
|
|
p->data = 0;
|
|
p->size = 0;
|
|
p->pos = 0;
|
|
}
|