| 1 | /* 7zBuf2.c -- Byte Buffer\r |
| 2 | 2014-08-22 : Igor Pavlov : Public domain */\r |
| 3 | \r |
| 4 | #include "Precomp.h"\r |
| 5 | \r |
| 6 | #include <string.h>\r |
| 7 | \r |
| 8 | #include "7zBuf.h"\r |
| 9 | \r |
| 10 | void DynBuf_Construct(CDynBuf *p)\r |
| 11 | {\r |
| 12 | p->data = 0;\r |
| 13 | p->size = 0;\r |
| 14 | p->pos = 0;\r |
| 15 | }\r |
| 16 | \r |
| 17 | void DynBuf_SeekToBeg(CDynBuf *p)\r |
| 18 | {\r |
| 19 | p->pos = 0;\r |
| 20 | }\r |
| 21 | \r |
| 22 | int DynBuf_Write(CDynBuf *p, const Byte *buf, size_t size, ISzAlloc *alloc)\r |
| 23 | {\r |
| 24 | if (size > p->size - p->pos)\r |
| 25 | {\r |
| 26 | size_t newSize = p->pos + size;\r |
| 27 | Byte *data;\r |
| 28 | newSize += newSize / 4;\r |
| 29 | data = (Byte *)alloc->Alloc(alloc, newSize);\r |
| 30 | if (data == 0)\r |
| 31 | return 0;\r |
| 32 | p->size = newSize;\r |
| 33 | memcpy(data, p->data, p->pos);\r |
| 34 | alloc->Free(alloc, p->data);\r |
| 35 | p->data = data;\r |
| 36 | }\r |
| 37 | if (size != 0)\r |
| 38 | {\r |
| 39 | memcpy(p->data + p->pos, buf, size);\r |
| 40 | p->pos += size;\r |
| 41 | }\r |
| 42 | return 1;\r |
| 43 | }\r |
| 44 | \r |
| 45 | void DynBuf_Free(CDynBuf *p, ISzAlloc *alloc)\r |
| 46 | {\r |
| 47 | alloc->Free(alloc, p->data);\r |
| 48 | p->data = 0;\r |
| 49 | p->size = 0;\r |
| 50 | p->pos = 0;\r |
| 51 | }\r |