4.44 beta

CPP/7zip/Archive/Deb/DebIn.cpp

@@ -0,0 +1,165 @@
+// Archive/DebIn.cpp
+
+#include "StdAfx.h"
+
+#include "DebIn.h"
+#include "DebHeader.h"
+
+#include "Common/StringToInt.h"
+#include "Windows/Defs.h"
+
+#include "../../Common/StreamUtils.h"
+
+namespace NArchive {
+namespace NDeb {
+
+using namespace NHeader;
+
+HRESULT CInArchive::ReadBytes(void *data, UInt32 size, UInt32 &processedSize)
+{
+  RINOK(ReadStream(m_Stream, data, size, &processedSize));
+  m_Position += processedSize;
+  return S_OK;
+}
+
+HRESULT CInArchive::Open(IInStream *inStream)
+{
+  RINOK(inStream->Seek(0, STREAM_SEEK_CUR, &m_Position));
+  char signature[kSignatureLen];
+  UInt32 processedSize;
+  RINOK(ReadStream(inStream, signature, kSignatureLen, &processedSize));
+  m_Position += processedSize;
+  if (processedSize != kSignatureLen)
+    return S_FALSE;
+  if (memcmp(signature, kSignature, kSignatureLen) != 0)
+    return S_FALSE;
+  m_Stream = inStream;
+  return S_OK;
+}
+
+static void MyStrNCpy(char *dest, const char *src, int size)
+{
+  for (int i = 0; i < size; i++)
+  {
+    char c = src[i];
+    dest[i] = c;
+    if (c == 0)
+      break;
+  }
+}
+
+static bool OctalToNumber(const char *s, int size, UInt64 &res)
+{
+  char sz[32];
+  MyStrNCpy(sz, s, size);
+  sz[size] = 0;
+  const char *end;
+  int i;
+  for (i = 0; sz[i] == ' '; i++);
+  res = ConvertOctStringToUInt64(sz + i, &end);
+  return (*end == ' ' || *end == 0);
+}
+
+static bool OctalToNumber32(const char *s, int size, UInt32 &res)
+{
+  UInt64 res64;
+  if (!OctalToNumber(s, size, res64))
+    return false;
+  res = (UInt32)res64;
+  return (res64 <= 0xFFFFFFFF);
+}
+
+static bool DecimalToNumber(const char *s, int size, UInt64 &res)
+{
+  char sz[32];
+  MyStrNCpy(sz, s, size);
+  sz[size] = 0;
+  const char *end;
+  int i;
+  for (i = 0; sz[i] == ' '; i++);
+  res = ConvertStringToUInt64(sz + i, &end);
+  return (*end == ' ' || *end == 0);
+}
+
+static bool DecimalToNumber32(const char *s, int size, UInt32 &res)
+{
+  UInt64 res64;
+  if (!DecimalToNumber(s, size, res64))
+    return false;
+  res = (UInt32)res64;
+  return (res64 <= 0xFFFFFFFF);
+}
+
+#define RIF(x) { if (!(x)) return S_FALSE; }
+
+
+HRESULT CInArchive::GetNextItemReal(bool &filled, CItemEx &item)
+{
+  filled = false;
+
+  char header[NHeader::kHeaderSize];
+  const char *cur = header;
+
+  UInt32 processedSize;
+  item.HeaderPosition = m_Position;
+  RINOK(ReadBytes(header, sizeof(header), processedSize));
+  if (processedSize < sizeof(header))
+    return S_OK;
+  
+  char tempString[kNameSize + 1];
+  MyStrNCpy(tempString, cur, kNameSize);
+  cur += kNameSize;
+  tempString[kNameSize] = '\0';
+  item.Name = tempString;
+  item.Name.Trim();
+
+  for (int i = 0; i < item.Name.Length(); i++)
+    if (((Byte)item.Name[i]) < 0x20)
+      return S_FALSE;
+
+  RIF(DecimalToNumber32(cur, kTimeSize, item.ModificationTime));
+  cur += kTimeSize;
+
+  cur += 6 + 6;
+  
+  RIF(OctalToNumber32(cur, kModeSize, item.Mode));
+  cur += kModeSize;
+
+  RIF(DecimalToNumber(cur, kSizeSize, item.Size));
+  cur += kSizeSize;
+
+  filled = true;
+  return S_OK;
+}
+
+HRESULT CInArchive::GetNextItem(bool &filled, CItemEx &item)
+{
+  for (;;)
+  {
+    RINOK(GetNextItemReal(filled, item));
+    if (!filled)
+      return S_OK;
+    if (item.Name.CompareNoCase("debian-binary") != 0)
+      return S_OK;
+    if (item.Size != 4)
+      return S_OK;
+    SkeepData(item.Size);
+  }
+}
+
+HRESULT CInArchive::Skeep(UInt64 numBytes)
+{
+  UInt64 newPostion;
+  RINOK(m_Stream->Seek(numBytes, STREAM_SEEK_CUR, &newPostion));
+  m_Position += numBytes;
+  if (m_Position != newPostion)
+    return E_FAIL;
+  return S_OK;
+}
+
+HRESULT CInArchive::SkeepData(UInt64 dataSize)
+{
+  return Skeep((dataSize + 1) & (~((UInt64)0x1)));
+}
+
+}}