summaryrefslogtreecommitdiff
path: root/apt-pkg/contrib/hashsum.cc
diff options
context:
space:
mode:
Diffstat (limited to 'apt-pkg/contrib/hashsum.cc')
-rw-r--r--apt-pkg/contrib/hashsum.cc28
1 files changed, 28 insertions, 0 deletions
diff --git a/apt-pkg/contrib/hashsum.cc b/apt-pkg/contrib/hashsum.cc
new file mode 100644
index 000000000..0edcbb364
--- /dev/null
+++ b/apt-pkg/contrib/hashsum.cc
@@ -0,0 +1,28 @@
+// Cryptographic API Base
+#include <config.h>
+
+#include <unistd.h>
+#include "hashsum_template.h"
+
+// Summation::AddFD - Add content of file into the checksum /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool SummationImplementation::AddFD(int const Fd, unsigned long long Size) {
+ unsigned char Buf[64 * 64];
+ ssize_t Res = 0;
+ int ToEOF = (Size == 0);
+ while (Size != 0 || ToEOF)
+ {
+ unsigned long long n = sizeof(Buf);
+ if (!ToEOF) n = min(Size, n);
+ Res = read(Fd, Buf, n);
+ if (Res < 0 || (!ToEOF && Res != (ssize_t) n)) // error, or short read
+ return false;
+ if (ToEOF && Res == 0) // EOF
+ break;
+ Size -= Res;
+ Add(Buf,Res);
+ }
+ return true;
+}
+ /*}}}*/