OpenDescriptor should autoclose fd always on error

[apt.git] / apt-pkg / contrib / hashsum.cc

diff --git a/apt-pkg/contrib/hashsum.cc b/apt-pkg/contrib/hashsum.cc
index ff3b112bbff98f02df871d1c0e55f40387d43831..289e43aa42ead780a8951d6346244a955a92e1b2 100644 (file)
--- a/apt-pkg/contrib/hashsum.cc
+++ b/apt-pkg/contrib/hashsum.cc
@@ -24,5 +24,27 @@ bool SummationImplementation::AddFD(int const Fd, unsigned long long Size) {
       Add(Buf,Res);
    }
    return true;
+}
+bool SummationImplementation::AddFD(FileFd &Fd, unsigned long long Size) {
+   unsigned char Buf[64 * 64];
+   bool ToEOF = (Size == 0);
+   while (Size != 0 || ToEOF)
+   {
+      unsigned long long n = sizeof(Buf);
+      if (!ToEOF) n = std::min(Size, n);
+      unsigned long long a = 0;
+      if (Fd.Read(Buf, n, &a) == false) // error
+        return false;
+      if (ToEOF == false)
+      {
+        if (a != n) // short read
+           return false;
+      }
+      else if (a == 0) // EOF
+        break;
+      Size -= a;
+      Add(Buf, a);
+   }
+   return true;
 }
                                                                        /*}}}*/