From c31c1dded85ee1e88231a041aac7e507f2ed426c Mon Sep 17 00:00:00 2001
From: David Kalnischkies <kalnischkies@gmail.com>
Date: Wed, 13 Jul 2011 16:37:15 +0200
Subject: move implementation of checksums around by abstracting even more

---
 apt-pkg/contrib/hashsum.cc | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)
 create mode 100644 apt-pkg/contrib/hashsum.cc

(limited to 'apt-pkg/contrib/hashsum.cc')

diff --git a/apt-pkg/contrib/hashsum.cc b/apt-pkg/contrib/hashsum.cc
new file mode 100644
index 000000000..b97eaf831
--- /dev/null
+++ b/apt-pkg/contrib/hashsum.cc
@@ -0,0 +1,28 @@
+// Cryptographic API Base
+
+#include <unistd.h>
+#include "hashsum_template.h"
+
+// Summation::AddFD - Add content of file into the checksum		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool SummationImplementation::AddFD(int const Fd, unsigned long Size) {
+   unsigned char Buf[64 * 64];
+   int Res = 0;
+   int ToEOF = (Size == 0);
+   unsigned long n = sizeof(Buf);
+   if (!ToEOF)
+      n = std::min(Size, n);
+   while (Size != 0 || ToEOF)
+   {
+      Res = read(Fd, Buf, n);
+      if (Res < 0 || (!ToEOF && (unsigned) Res != n)) // error, or short read
+	 return false;
+      if (ToEOF && Res == 0) // EOF
+	 break;
+      Size -= Res;
+      Add(Buf,Res);
+   }
+   return true;
+}
+									/*}}}*/
-- 
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