53 lines
970 B
C
53 lines
970 B
C
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/* 7zBuf2.c -- Byte Buffer
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2017-04-03 : Igor Pavlov : Public domain */
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#include "Precomp.h"
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#include <string.h>
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#include "7zBuf.h"
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void DynBuf_Construct(CDynBuf *p)
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{
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p->data = 0;
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p->size = 0;
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p->pos = 0;
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}
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void DynBuf_SeekToBeg(CDynBuf *p)
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{
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p->pos = 0;
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}
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int DynBuf_Write(CDynBuf *p, const Byte *buf, size_t size, ISzAllocPtr alloc)
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{
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if (size > p->size - p->pos)
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{
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size_t newSize = p->pos + size;
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Byte *data;
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newSize += newSize / 4;
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data = (Byte *)ISzAlloc_Alloc(alloc, newSize);
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if (!data)
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return 0;
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p->size = newSize;
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if (p->pos != 0)
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memcpy(data, p->data, p->pos);
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ISzAlloc_Free(alloc, p->data);
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p->data = data;
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}
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if (size != 0)
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{
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memcpy(p->data + p->pos, buf, size);
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p->pos += size;
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}
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return 1;
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}
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void DynBuf_Free(CDynBuf *p, ISzAllocPtr alloc)
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{
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ISzAlloc_Free(alloc, p->data);
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p->data = 0;
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p->size = 0;
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p->pos = 0;
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}
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