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 } 46
