repo sync | baa3858 | 2013-07-26 17:53:31 -0700 | [diff] [blame] | 1 | /* 7zBuf2.c -- Byte Buffer
|
| 2 | 2008-10-04 : Igor Pavlov : Public domain */
|
| 3 |
|
| 4 | #include <string.h>
|
| 5 | #include "7zBuf.h"
|
| 6 |
|
| 7 | void DynBuf_Construct(CDynBuf *p)
|
| 8 | {
|
| 9 | p->data = 0;
|
| 10 | p->size = 0;
|
| 11 | p->pos = 0;
|
| 12 | }
|
| 13 |
|
| 14 | void DynBuf_SeekToBeg(CDynBuf *p)
|
| 15 | {
|
| 16 | p->pos = 0;
|
| 17 | }
|
| 18 |
|
| 19 | int DynBuf_Write(CDynBuf *p, const Byte *buf, size_t size, ISzAlloc *alloc)
|
| 20 | {
|
| 21 | if (size > p->size - p->pos)
|
| 22 | {
|
| 23 | size_t newSize = p->pos + size;
|
| 24 | Byte *data;
|
| 25 | newSize += newSize / 4;
|
| 26 | data = (Byte *)alloc->Alloc(alloc, newSize);
|
| 27 | if (data == 0)
|
| 28 | return 0;
|
| 29 | p->size = newSize;
|
| 30 | memcpy(data, p->data, p->pos);
|
| 31 | alloc->Free(alloc, p->data);
|
| 32 | p->data = data;
|
| 33 | }
|
| 34 | memcpy(p->data + p->pos, buf, size);
|
| 35 | p->pos += size;
|
| 36 | return 1;
|
| 37 | }
|
| 38 |
|
| 39 | void DynBuf_Free(CDynBuf *p, ISzAlloc *alloc)
|
| 40 | {
|
| 41 | alloc->Free(alloc, p->data);
|
| 42 | p->data = 0;
|
| 43 | p->size = 0;
|
| 44 | p->pos = 0;
|
| 45 | }
|