Alexander Suvorov
45 lines
927 B
C++
45 lines
927 B
C++
/* 7zBuf2.c -- Byte Buffer
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2008-10-04 : Igor Pavlov : Public domain */
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#include "crn_core.h"
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#include <string.h>
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#include "lzma_7zBuf.h"
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namespace crnlib {
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void DynBuf_Construct(CDynBuf* p) {
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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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p->pos = 0;
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}
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int DynBuf_Write(CDynBuf* p, const Byte* buf, size_t size, ISzAlloc* alloc) {
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if (size > p->size - p->pos) {
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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*)alloc->Alloc(alloc, newSize);
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if (data == 0)
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return 0;
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p->size = newSize;
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memcpy(data, p->data, p->pos);
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alloc->Free(alloc, p->data);
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p->data = data;
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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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return 1;
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}
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void DynBuf_Free(CDynBuf* p, ISzAlloc* alloc) {
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alloc->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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}
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