| /* 7zBuf2.c -- Byte Buffer |
| 2008-10-04 : Igor Pavlov : Public domain */ |
| |
| #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; |
| } |