tor-browser

The Tor Browser
git clone https://git.dasho.dev/tor-browser.git
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7zBuf2.c (970B)

      1 /* 7zBuf2.c -- Byte Buffer
      2 2017-04-03 : Igor Pavlov : Public domain */
      3 
      4 #include "Precomp.h"
      5 
      6 #include <string.h>
      7 
      8 #include "7zBuf.h"
      9 
     10 void DynBuf_Construct(CDynBuf *p)
     11 {
     12  p->data = 0;
     13  p->size = 0;
     14  p->pos = 0;
     15 }
     16 
     17 void DynBuf_SeekToBeg(CDynBuf *p)
     18 {
     19  p->pos = 0;
     20 }
     21 
     22 int DynBuf_Write(CDynBuf *p, const Byte *buf, size_t size, ISzAllocPtr alloc)
     23 {
     24  if (size > p->size - p->pos)
     25  {
     26    size_t newSize = p->pos + size;
     27    Byte *data;
     28    newSize += newSize / 4;
     29    data = (Byte *)ISzAlloc_Alloc(alloc, newSize);
     30    if (!data)
     31      return 0;
     32    p->size = newSize;
     33    if (p->pos != 0)
     34      memcpy(data, p->data, p->pos);
     35    ISzAlloc_Free(alloc, p->data);
     36    p->data = data;
     37  }
     38  if (size != 0)
     39  {
     40    memcpy(p->data + p->pos, buf, size);
     41    p->pos += size;
     42  }
     43  return 1;
     44 }
     45 
     46 void DynBuf_Free(CDynBuf *p, ISzAllocPtr alloc)
     47 {
     48  ISzAlloc_Free(alloc, p->data);
     49  p->data = 0;
     50  p->size = 0;
     51  p->pos = 0;
     52 }